CN114343823A - Cryoablation needle with adjustable target area - Google Patents
Cryoablation needle with adjustable target area Download PDFInfo
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- CN114343823A CN114343823A CN202210275285.4A CN202210275285A CN114343823A CN 114343823 A CN114343823 A CN 114343823A CN 202210275285 A CN202210275285 A CN 202210275285A CN 114343823 A CN114343823 A CN 114343823A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0231—Characteristics of handpieces or probes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0293—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument interstitially inserted into the body, e.g. needle
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Abstract
The invention provides a cryoablation needle with an adjustable target area, which comprises: an adjusting component and a fixing component; the adjusting assembly comprises: preceding thermal-insulated pipe and adjusting device, fixed subassembly includes: the cutter shell, the air inlet pipe fitting and the rear heat insulation pipe are arranged on the cutter shell; the far end of the front heat insulation pipe penetrates through the cutter shell, and a section of area between the far end of the front heat insulation pipe and the cutter point is a targeting area; the near end of the front heat insulation pipe is positioned in the far end of the rear heat insulation pipe; the air inlet pipe fitting is arranged in the rear heat insulation pipe in a penetrating manner and arranged in the front heat insulation pipe in a penetrating manner, and the far end of the air inlet pipe fitting extends out of the far end of the front heat insulation pipe; the front insulated tube is switchable between at least two adjustment positions relative to the fixation assembly to adjust the length of the target zone. The invention has simple structure and low process realization difficulty, the position of the cutter head cannot be changed along with the adjustment of the target area, and the operation risk is low.
Description
Technical Field
The invention relates to the technical field of cryoablation, in particular to a cryoablation needle with an adjustable target area.
Background
The size and the shape of the ice hockey are determined by the length of the target area of the cryoablation needle, the length of the target area can be automatically adjusted by the cryoablation needle with the adjustable target area according to the size of the tumor, so that excessive ablation, incomplete ablation or frostbite of peripheral organs and blood vessels can be avoided, and the cryoablation needle with the adjustable target area has great clinical significance for focuses of prostate cancer, breast cancer, thyroid nodule, pancreatic cancer and the like. In addition, since most ablation procedures are performed by CT scanning in clinic, the size of the scanning window of CT is limited, which requires that the handle of the cryoablation needle be right-angled so that the rear delivery line does not interfere with the CT window. Therefore, the adjustable target area cryoablation needle of the bent handle is the specification with the highest clinical application value.
In the prior art, the adjustment scheme of the target area is that the vacuum wall is fixed and the needle rod is adjusted forwards and backwards. The length of the target area is adjusted by the back-and-forth movement of the needle rod, and in order to ensure that the ice hockey can cover the needle point all the time, the position of the air outlet of the J-T groove relative to the needle rod is required to be fixed. Although the technical structure is simple, the realization process difficulty is higher, and the position of the needle head is changed along with the adjustment of the target area, which brings inconvenience to the adjustment in the operation and has high operation risk.
Disclosure of Invention
The invention provides a cryoablation needle with an adjustable target area, which aims to solve the problems of high implementation difficulty, inconvenience in adjustment of the target area during operation and high operation risk of the cryoablation needle in the prior art.
The invention provides a cryoablation needle with an adjustable target area, which comprises: an adjusting component and a fixing component;
the adjustment assembly includes: a front heat insulation pipe and an adjusting device,
the fixing assembly includes: the cutter shell, the air inlet pipe fitting and the rear heat insulation pipe are arranged on the cutter shell;
the relative positions of the knife shell, the air inlet pipe fitting and the rear heat insulation pipe are fixed;
the far end of the knife shell is provided with a knife tip;
the far end of the front heat insulation pipe penetrates through the cutter shell, the far end of the front heat insulation pipe is the end, close to the cutter point, of the front heat insulation pipe, and a section of area between the far end of the front heat insulation pipe and the cutter point is a target area;
the near end of the front heat insulation pipe is positioned in the far end of the rear heat insulation pipe, and the far end of the rear heat insulation pipe is the end, close to the tool nose, of the rear heat insulation pipe;
the air inlet pipe fitting penetrates through the rear heat insulation pipe and the front heat insulation pipe, the far end of the air inlet pipe fitting extends out of the far end of the front heat insulation pipe, the near end of the air inlet pipe fitting extends out of the near end of the rear heat insulation pipe, and the far end of the air inlet pipe fitting is the end, close to the tool nose, of the air inlet pipe fitting;
the front insulated tube is switchable between at least two adjustment positions relative to the fixation assembly to adjust the length of the target zone;
the adjusting device is directly or indirectly connected with the front heat insulation pipe and can be controlled to drive the front heat insulation pipe to move along the axis direction of the front heat insulation pipe so as to switch the adjusting position of the front heat insulation pipe.
Preferably, the contact point of the front heat insulation pipe and the adjusting device is located at an outer leakage front heat insulation pipe, and the outer leakage front heat insulation pipe is a part of the front heat insulation pipe which leaks from the cutter housing and the rear heat insulation pipe;
the adjusting device comprises: and a roller unit, wherein part of the roller unit can be controlled to rotate, and friction force is generated between the roller unit and the front heat insulation pipe so as to drive the front heat insulation pipe to move along the axis direction of the front heat insulation pipe.
Preferably, the roller unit includes: the first gear fixing plate, the first main roller, the first auxiliary roller, the first gear, the second gear, the third gear, the first internal gear, the first synchronizing wheel, the second synchronizing wheel, the first gear connecting shaft, the first synchronizing belt and the first synchronizing wheel rotating shaft are arranged on the first gear fixing plate; wherein the content of the first and second substances,
the first main roller and the first auxiliary roller are respectively arranged on the first gear fixing plate, and are respectively arranged on two opposite sides of the front heat insulation pipe;
the first gear connecting shaft is fixed on the first gear fixing plate;
the first gear and the second gear are respectively installed on two opposite sides of the first main roller in a tight fit manner, the third gear is installed on the first auxiliary roller in a tight fit manner, the first gear is meshed with the third gear, and the second gear is meshed with the first inner gear;
the first synchronous wheel and the second synchronous wheel are respectively arranged on the inner sides of two ends of the first synchronous belt, the first synchronous wheel and the first internal gear are sleeved on the first gear connecting shaft, the first synchronous wheel and the first internal gear are coaxially fixed, and the second synchronous wheel is sleeved on a first synchronous wheel rotating shaft;
the first synchronous belt can be controlled to drive the first synchronous wheel and the second synchronous wheel to rotate so as to drive the first inner gear to rotate, further drive the second gear, the first main roller and the first gear to be linked, further drive the third gear to rotate, further drive the first auxiliary roller to rotate, wherein the rotation direction of the first auxiliary roller is opposite to that of the first main roller, and the front heat insulation pipe is driven to move along the axis direction through friction among the first main roller, the first auxiliary roller and the front heat insulation pipe.
Preferably, the first synchronous belt is provided with scales.
Preferably, the roller unit includes: the second gear fixing plate, the second main roller, the second auxiliary roller, the fourth gear, the fifth gear, the sixth gear, the second internal gear and the second gear connecting shaft are arranged on the first gear fixing plate; wherein the content of the first and second substances,
the second main roller and the second auxiliary roller are respectively arranged on the second gear fixing plate and are respectively arranged on two opposite sides of the front heat insulation pipe;
the second gear connecting shaft is fixed on the second gear fixing plate;
the fourth gear and the fifth gear are respectively and tightly installed on two opposite sides of the second main roller wheel, the sixth gear is tightly installed on the second auxiliary roller wheel, the fourth gear is meshed with the sixth gear, and the fifth gear is meshed with the second inner gear;
the second internal gear can be controlled to drive the fifth gear, the second main roller and the fourth gear are linked to further drive the sixth gear to rotate so as to drive the second auxiliary roller to rotate, the rotation direction of the second auxiliary roller is opposite to that of the second main roller, and the front heat insulation pipe is driven to move along the axis direction through friction force between the second main roller and the second auxiliary roller and the front heat insulation pipe.
Preferably, the roller unit further includes: the third synchronous wheel, the fourth synchronous wheel, the second synchronous belt and the second synchronous wheel rotating shaft are arranged on the frame; wherein the content of the first and second substances,
the third synchronous wheel and the fourth synchronous wheel are respectively arranged on the inner sides of two ends of the second synchronous belt, the third synchronous wheel and the second internal gear are sleeved on the second gear connecting shaft, the third synchronous wheel and the second internal gear are coaxially fixed, and the fourth synchronous wheel is sleeved on the second synchronous wheel rotating shaft;
the second internal gear can be controlled to drive the third synchronous wheel to link, so that the second synchronous belt is driven to rotate, and the fourth synchronous wheel is driven to rotate;
and scales are arranged on the second synchronous belt.
Preferably, the rear heat insulation pipe comprises: the first straight pipe, the bent pipe and the second straight pipe are distributed in sequence from the far end to the near end of the rear heat insulation pipe;
the part, which is the farthest away from the proximal end of the front heat insulation pipe, does not exceed the proximal end of the first straight pipe, and the proximal end of the first straight pipe is the end, far away from the knife tip, of the first straight pipe.
Preferably, the method further comprises the following steps: the handle, the back heat insulation pipe wears to locate in the handle.
Preferably, the fixing assembly further comprises: an air return pipe;
the muffler is arranged in the rear heat insulation pipe in a penetrating mode, the far end of the muffler is located in the rear heat insulation pipe, the near end of the muffler extends out of the rear heat insulation pipe, and the far end of the muffler is the end, close to the tool nose, of the muffler.
Preferably, the fixing assembly further comprises: a handle rear end cap covering a proximal end of the handle;
the air inlet pipe fitting, the air return pipe and the rear heat insulation pipe are connected with the handle rear end cover in a sealing mode.
Preferably, the fixing assembly further comprises: a front sealing device and a rear sealing device; wherein the content of the first and second substances,
the front sealing device is used for dynamically sealing between the cutter shell and the front heat insulation pipe; the rear sealing device is used for dynamic sealing between the front heat insulation pipe and the rear heat insulation pipe.
Preferably, the front sealing means comprises: the first sealing ring front baffle, the first sealing ring rear baffle and the first sealing ring; and/or, the rear sealing device comprises: the front baffle of the second sealing ring, the rear baffle of the second sealing ring and the second sealing ring; wherein the content of the first and second substances,
the front baffle of the first sealing ring and the rear baffle of the first sealing ring are positioned at two opposite sides of the first sealing ring, the first sealing ring is sleeved on the outer wall of the front heat-insulation pipe, the inner wall of the first sealing ring is hermetically connected with the outer wall of the front heat-insulation pipe, and the outer wall of the first sealing ring is hermetically connected with the inner wall of the cutter shell;
the baffle before the second sealing washer, second sealing washer backplate is located the relative both sides of second sealing washer, the second sealing washer cover is located the outer wall of preceding thermal-insulated pipe, the inner wall of second sealing washer with the outer wall sealing connection of preceding thermal-insulated pipe, the outer wall of second sealing washer with the inner wall sealing connection of back thermal-insulated pipe.
Preferably, the fixing assembly further comprises: and the limiting device is arranged on the inner wall of the cutter shell and used for limiting the farthest distance of the front heat insulation pipe moving towards the direction of the cutter point.
Preferably, the air inlet pipe member includes: J-T grooves, finned tubes and air inlet pipes; wherein the content of the first and second substances,
the J-T grooves, the finned tubes and the air inlet pipe are distributed in sequence from the far end to the near end of the air inlet pipe fitting;
the two ends of the finned tube are respectively connected with the near end of the J-T groove and the far end of the air inlet pipe, the near end of the J-T groove is the end, far away from the tool tip, of the J-T groove, and the far end of the air inlet pipe is the end, close to the tool tip, of the air inlet pipe.
Preferably, the fixing assembly further comprises: a mandrel inserted from a proximal end of the rear heat shield pipe;
the finned tube is wound into a plurality of spiral coils, and the mandrel penetrates through the spiral coils of the finned tube.
Preferably, glue is poured into the mandrel for sealing.
Preferably, the method further comprises the following steps: a temperature measuring line;
the far end of the temperature measuring line is a temperature measuring point; the far end of the temperature measuring line is the end of the temperature measuring line close to the cutter tip;
the temperature measuring point is arranged at the far end of the front heat insulation pipe and is used for measuring the temperature at the far end of the front heat insulation pipe.
The cryoablation needle with the adjustable target area, provided by the invention, has the advantages that the front heat insulation pipe is adjusted forwards and backwards through the scheme that the cutter shell is not moved, the structure is simple, the process realization difficulty is low, the position of the cutter head cannot be changed along with the adjustment of the target area, and the operation risk is low.
In an alternative scheme of the invention, the friction roller mechanism of the roller unit drives the front heat insulation pipe to be adjusted back and forth, the heat insulation pipe which leaks outside is shortened to the shortest, and the heat insulation pipe which is coaxial with the cutter shell is shortened greatly, so that the interference probability of a cryoablation needle and a CT window can be reduced in clinical application, and the risk of cutter head displacement and organ tearing can also be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a cryoablation needle with an adjustable target area according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cryoablation needle with a shortest target zone in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged view of the interior of the blade housing with the shortest target zone in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of a cryoablation needle with a longest target area according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the interior of the housing of an embodiment of the present invention with the target area at its longest;
FIG. 6 is a schematic view of an adjustment assembly in accordance with a preferred embodiment of the present invention;
FIG. 7 is a partial internal view of FIG. 6;
FIG. 8 is a schematic view of an adjustment assembly in accordance with another preferred embodiment of the present invention;
fig. 9 is a partial internal view of fig. 8.
Description of reference numerals:
11-a front heat-insulating pipe,
111-the inner tube of the vacuum wall,
112-vacuum wall outer tube;
12-a means for adjusting the position of the device,
1201-a first gear fixing plate,
1202-a first main roller wheel,
1203-a first auxiliary wheel,
1204-the first gear wheel of the gear wheel,
1205-the second gear wheel is,
1206-a third gear wheel, the third gear wheel,
1207-the first internal gear wheel,
1208-a first one of the synchronization wheels,
1209-a second synchronizing wheel,
1210-a first gear connecting shaft,
1211 — a first synchronization belt,
1212-first synchronizing wheel rotation axis;
1213-second gear fixing plate,
1214-a second main roller wheel,
1215-a second auxiliary wheel, and,
1216-a fourth gear wheel, the number of which is two,
1217-the fifth gear wheel(s),
1218-a sixth gear wheel,
1219-the second internal gear wheel,
1220-a second gear connecting shaft,
1221-a third synchronizing wheel, and,
1222-a fourth synchronizing wheel, which is,
1223-a second timing belt,
1224-second synchronizer wheel rotational axis;
13-a targeting region;
21-the knife shell is arranged on the knife handle,
211-the tip of the knife,
22-a gas inlet pipe fitting, the gas inlet pipe fitting,
a 221-J-T groove is formed in the groove,
222-a finned tube, wherein the finned tube is,
223-an air inlet pipe,
23-a rear heat-insulating pipe,
231-the first straight tube, and the second straight tube,
232-a bent pipe, namely a pipe,
233-second straight pipe;
24-a front seal assembly for the front seal assembly,
241-the front baffle of the first sealing ring,
242-the first sealing ring is then placed in the chamber,
243-first seal ring tailgate;
25-a rear sealing assembly, the rear sealing assembly,
251-a second sealing ring front baffle plate,
252-a second sealing ring, which is,
253-second seal ring tailgate;
26-a handle, wherein the handle is provided with a handle,
261-handle rear end cap;
27-an air return pipe, wherein the air return pipe is arranged on the air return pipe,
28-a mandrel for the production of a plastic part,
29-a temperature measuring line, wherein,
291-temperature measuring point.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "upper surface", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, "a plurality" means a plurality, e.g., two, three, four, etc., unless specifically limited otherwise.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In one embodiment, a cryoablation needle with an adjustable target area is provided, comprising: an adjusting component and a fixing component; the adjusting assembly comprises: preceding insulating tube 11 and adjusting device 12, fixed subassembly includes: a knife housing 21, an air inlet pipe 22 and a rear heat insulation pipe 23, please refer to fig. 1. The relative positions of the knife shell 21, the air inlet pipe fitting 22 and the rear heat insulation pipe 23 are fixed; the distal end of the blade housing 21 has a blade tip 211. The distal end of the front heat insulation pipe 11 penetrates through the cutter housing 21, the distal end of the front heat insulation pipe 11 is the end of the front heat insulation pipe 11 close to the cutter point 21, and a section of region between the distal end of the front heat insulation pipe 11 and the cutter point 211 is a target region 13. The proximal end of the front heat insulation pipe 11 is located in the distal end of the rear heat insulation pipe 23, and the distal end of the rear heat insulation pipe 23 is the end of the rear heat insulation pipe 23 close to the knife tip 211. The air inlet pipe 22 is arranged in the rear heat insulation pipe 23 and in the front heat insulation pipe 11 in a penetrating manner, the far end of the air inlet pipe 22 extends out of the far end of the front heat insulation pipe 11, the near end of the air inlet pipe 22 extends out of the near end of the rear heat insulation pipe 23, and the far end of the air inlet pipe 22 is the end, close to the knife tip 211, of the air inlet pipe 22.
Wherein the front insulating tube 11 can be switched between at least two adjustment positions relative to the fixation assembly to adjust the length of the target zone 13. The adjusting device 12 is directly or indirectly connected with the front heat insulation pipe 11, and the adjusting device 12 can be controlled to drive the front heat insulation pipe 11 to move along the axis direction of the front heat insulation pipe 11 so as to switch the adjusting position of the front heat insulation pipe.
In the following, two adjustment positions of the heat insulation tube 11 are taken as an example, in the first adjustment position, the length MIN of the target zone 13 is the shortest, fig. 2 shows a schematic view of the cryoablation needle with the shortest target zone, fig. 3 shows an enlarged view of the inside of the blade housing with the shortest target zone, and the right side of fig. 2 shows an enlarged view of the portion a. In the second adjustment position, the length of the target area 13 is at its maximum MAX, as shown in FIG. 4, which is a schematic view of the cryoablation needle with the largest target area, as shown in FIG. 5, which is an enlarged view of the interior of the blade housing with the largest target area, and as shown in FIG. 4, which is an enlarged view of portion B, to the right.
In different embodiments, the adjusting positions of the front insulating pipe 11 may also include more than two, one adjusting position is the shortest length position of the target area in the above embodiments, another adjusting position is the longest length position of the target area in the above embodiments, and the rest adjusting positions are one or more positions set between the two adjusting positions, or may stop at any position between the two adjusting positions.
In one embodiment, the contact point between the front heat insulation pipe 11 and the adjusting device 12 is located at the outer front heat insulation pipe, which is the part of the front heat insulation pipe that leaks from the knife housing and the rear heat insulation pipe, please refer to fig. 1. The adjusting device 12 includes: and the roller units, some of which can be controlled to rotate, generate friction force with the front heat insulation pipe to drive the front heat insulation pipe 11 to move along the axis direction of the front heat insulation pipe.
If the thermal insulation pipe is exposed behind the knife shell and then adjusted through the shifting block fixed on the exposed thermal insulation pipe, the thermal insulation pipe needs to move backwards and extend into the handle section in the process of adjusting the targeted area from small to large, and therefore the exposed length of the thermal insulation pipe and the length of the thermal insulation pipe inserted into the handle section are not less than the maximum adjusting length of the targeted area. For example, the target area is adjustable in 10-40 mm, the maximum adjustment length of the target area is 30mm, so that the exposed length of the heat insulation pipe is at least 30mm, the length of the handle section coaxial with the heat insulation pipe is at least 30mm, and in practical application, the exposed section of the heat insulation pipe and the handle section are integrally a handle, so that the length of the handle coaxial with the knife shell is at least 60 mm. If the technology is applied to the ablation needle with the bent handle, the handle with the length of 60mm cannot be avoided, the longer the handle coaxial with the knife shell, the higher the probability of interference between the handle and the CT window, and the larger the moment of the needle which is dragged by the gravity of the handle and the delivery pipe, so the higher the risk of the needle shifting and organ tearing in the operation. In the embodiment, the friction force between the roller unit and the front heat insulation pipe is used for driving the front heat insulation pipe to be adjusted back and forth, the outer leakage heat insulation pipe can be shortened to the shortest length, the outer leakage is no longer required to be 30mm, the length of the rear heat insulation pipe (or the handle) coaxial with the cutter shell can be shortened to half of the original scheme, and therefore, the interference probability of the rear heat insulation pipe (or the handle) and a CT window can be reduced in clinical application, and the risk of cutter tip displacement and organ tearing can also be reduced.
In one embodiment, the driving force of the roller rotation of the roller unit and the synchronization among the plurality of rollers are realized by preferably adopting gear driving, the driving force of the gear rotation can be realized by directly poking a gear with a finger or poking a mechanism coaxial with the gear to rotate, and a belt driving gear can also be arranged.
In one embodiment, the roller unit includes: the first gear fixing plate 1201, the first main roller 1202, the first auxiliary roller 1203, the first gear 1204, the second gear 1205, the third gear 1206, the first internal gear 1207, the first synchronizing wheel 1208, the second synchronizing wheel 1209, the first gear connecting shaft 1210, the first synchronizing belt 1211, and the first synchronizing wheel rotating shaft 1212 are shown in fig. 6. The first main roller 1202 and the first auxiliary roller 1203 are respectively installed on the first gear fixing plate 1201, and the first main roller 1202 and the first auxiliary roller 1203 are respectively installed on two opposite sides of the outer wall of the front heat insulation pipe 11; the first gear connecting shaft 1210 is fixed to the first gear fixing plate 1201. The first gear 1204 and the second gear 1205 are respectively and tightly fitted on two opposite sides of the first main roller 1202, the third gear 1206 is tightly fitted on the first auxiliary roller 1203, the first gear 1204 is engaged with the third gear 1206, and the second gear 1205 is engaged with the first internal gear 1207, please refer to fig. 7. The first synchronizing wheel 1208 and the second synchronizing wheel 1209 are respectively installed at the inner sides of the two ends of the first synchronizing belt 1211, the first synchronizing wheel 1208 and the first internal gear 1207 are sleeved on the first gear connecting shaft 1210, the first synchronizing wheel 1208 and the first internal gear 1207 are coaxially fixed, and the second synchronizing wheel 1209 is sleeved on the first synchronizing wheel rotating shaft 1212.
Wherein, the first synchronous belt 1211 drives each mechanism linkage, specifically: the first synchronizing belt 1211 can be controlled to drive the first synchronizing wheel 1208 and the second synchronizing wheel 1209 to rotate, so as to drive the first inner gear 1207 to rotate, and further drive the second gear 1205, the first main roller 1202 and the first gear 1204 to link, and further drive the third gear 1206 to rotate, and further drive the first auxiliary roller 1203 to rotate. The rotation direction of the first auxiliary roller 1203 is opposite to the rotation direction of the first main roller 1202, so that the front heat insulation pipe 11 is driven to move along the axial direction by the friction force among the first main roller 1202, the first auxiliary roller 1203 and the front heat insulation pipe 11.
In a preferred embodiment, the first synchronous belt 1211 is provided with a scale for precisely displaying the adjusted length of the target area 13.
In another embodiment, the roller unit includes: a second gear fixing plate 1213, a second main roller 1214, a second auxiliary roller 1215, a fourth gear 1216, a fifth gear 1217, a sixth gear 1218, a second internal gear 1219, and a second gear connecting shaft 1220, please refer to fig. 8. Wherein, the second main roller 1214 and the second auxiliary roller 1215 are respectively mounted on the second gear fixing plate 1213, and the second main roller 1214 and the second auxiliary roller 1215 are respectively disposed on two opposite sides of the outer wall of the front heat insulation pipe 11; the second gear connecting shaft 1220 is fixed to the second gear fixing plate 1213. A fourth gear 1216 and a fifth gear 1217 are respectively and tightly fitted on two opposite sides of the second main roller 1214, a sixth gear 1218 is tightly fitted on the second auxiliary roller 1215, the fourth gear 1216 is engaged with the sixth gear 1218, and the fifth gear 1217 is engaged with the second internal gear 1219, please refer to fig. 9.
The second internal gear 1219 drives the mechanisms to link, specifically: the second internal gear 1219 can be controlled to drive the fifth gear 1217, the second main roller 1214 and the fourth gear 1216 to link, so as to drive the sixth gear 1218 to rotate, so as to drive the second auxiliary roller 1215 to rotate, wherein the rotation direction of the second auxiliary roller 1215 is opposite to the rotation direction of the second main roller 1214, so as to drive the front heat insulation pipe 11 to move along the axis direction through the friction among the second main roller 1214, the second auxiliary roller 1215 and the front heat insulation pipe 11.
In a preferred embodiment, on the basis of the above embodiment using the second internal gear as the driving mechanism, the roller unit further includes: a third synchronizing wheel 1221, a fourth synchronizing wheel 1222, a second synchronizing belt 1223, and a second synchronizing wheel rotating shaft 1224, please refer to fig. 8. The third synchronous wheel 1221 and the fourth synchronous wheel 1222 are respectively installed at the inner sides of the two ends of the second synchronous belt 1223, the third synchronous wheel 1221 and the second internal gear 1219 are sleeved on the second gear connecting shaft 1220, the third synchronous wheel 1221 and the second internal gear 1219 are coaxially fixed, and the fourth synchronous wheel 1222 is sleeved on the second synchronous wheel rotating shaft 1224. The second internal gear 1219 can be controlled to drive the third synchronous wheel 1221 to link, so as to drive the second synchronous belt 1223 to rotate, and further drive the fourth synchronous wheel 1222 to rotate; the second timing belt 1223 is provided with scales. The second timing belt 1223 in this embodiment is driven by the third timing wheel 1221 and the fourth timing wheel 1222, and the driven timing belt is provided for marking the length of the target area 13 by the scale on the driven timing belt.
In one embodiment, the rear heat shield pipe 23 includes: the first straight tube 231, the bent tube 232, and the second straight tube 233 are sequentially distributed from the distal end to the proximal end of the rear heat insulation tube 23, that is, the first straight tube 231 is a rear heat insulation tube coaxial with the cutter housing 21, please refer to fig. 1. The proximal end of the front insulating tube 21 does not move the farthest beyond the proximal end of the first straight tube 231, and the proximal end of the first straight tube 231 is the end of the first straight tube 231 away from the knife edge 211.
In one embodiment, the securing assembly further comprises: a front seal 24 and a rear seal 25; wherein, the front sealing device 24 is used for dynamically sealing between the cutter shell and the front heat insulation pipe 11; the rear sealing device 25 is used for sealing between the front heat insulation pipe 11 and the rear heat insulation pipe 23, please refer to fig. 1.
In one embodiment, the front seal assembly 24 includes: a first seal ring front baffle 241, a first seal ring 242, and a first seal ring rear baffle 243; and/or, the rear sealing device 25 comprises: a second front seal ring shield 251, a second seal ring 252, and a second rear seal ring shield 253, please refer to fig. 2 and 4. The front baffle 241 and the rear baffle 243 of the first sealing ring are located at two opposite sides of the first sealing ring 242, the first sealing ring 242 is sleeved on the outer wall of the front heat insulation pipe 11, the inner wall of the first sealing ring 242 is connected with the outer wall of the front heat insulation pipe 11 in a sealing manner, and the outer wall of the first sealing ring 242 is connected with the inner wall of the cutter housing in a sealing manner. The second front seal ring baffle 251 and the second rear seal ring baffle 253 are located on two opposite sides of the second seal ring 252, the second seal ring 252 is sleeved on the outer wall of the front heat insulation pipe 11, the inner wall of the second seal ring 252 is connected with the outer wall of the front heat insulation pipe 11 in a sealing manner, and the outer wall of the second seal ring 252 is connected with the inner wall of the rear heat insulation pipe 23 in a sealing manner.
In one embodiment, the securing assembly further comprises: the handle 26 and the rear heat insulation pipe 23 are arranged in the handle 26 in a penetrating way, please refer to fig. 1.
In one embodiment, the securing assembly further comprises: the muffler 27 is shown in fig. 1. The air return pipe 27 penetrates through the rear heat insulation pipe 23, the far end of the air return pipe 27 is located in the rear heat insulation pipe 23, the near end of the air return pipe 27 extends out of the rear heat insulation pipe 23, and the far end of the air return pipe 27 is the end of the air return pipe 27 close to the knife tip 211.
In various embodiments, when the air return pipe 27 is not included, the air return can also be discharged from the gap between the air inlet pipe 22 and the heat insulation pipe.
In one embodiment, the securing assembly further comprises: a handle rear end cover 261, the handle rear end cover 261 covers the proximal end of the handle 26, please refer to fig. 2 and 4. The proximal ends of the air inlet pipe 22, the air return pipe 27 and the rear heat insulation pipe 23 are hermetically connected with the handle rear end cover 261.
In one embodiment, the securing assembly further comprises: and the limiting device is fixed on the inner wall of the cutter shell and used for limiting the farthest distance of the front heat insulation pipe moving towards the direction of the cutter point.
In one embodiment, the air inlet pipe member 22 includes: J-T grooves 221, finned tubes 222 and air inlet pipes 223, please refer to FIGS. 2 and 4. Wherein, from the far end to the near end of the air inlet pipe fitting 22, the J-T groove 221, the finned tube 222 and the air inlet pipe 223 are distributed in sequence. Two ends of the finned tube 222 are respectively connected with the near end of the J-T groove 221 and the far end of the air inlet pipe 223, the near end of the J-T groove 221 is the end of the J-T groove 221 far away from the tool nose 211, and the far end of the air inlet pipe 223 is the end of the air inlet pipe 223 close to the tool nose 211.
In one embodiment, the securing assembly further comprises: a mandrel 28, the mandrel 28 being inserted from the proximal end of the rear heat insulation pipe 23; the finned tube 222 is wound into a plurality of turns, and the mandrel 28 is threaded through the turns of the finned tube 222, see fig. 2 and 4.
In a preferred embodiment, the mandrel 28 is filled with glue for sealing.
In one embodiment, the securing assembly further comprises: a temperature measurement line 29; the far end of the temperature measuring line 29 is a temperature measuring point 291; the far end of the temperature measuring line 291 is the end of the temperature measuring line close to the knife tip; the temperature measuring point 291 is provided at the distal end of the front heat insulation pipe 11, and is used for measuring the temperature at the distal end of the front heat insulation pipe, please refer to fig. 2 and 4.
In one embodiment, the front insulation pipe 11 includes: please refer to fig. 2 and 4, the vacuum wall inner tube 111 and the vacuum wall outer tube 112. The vacuum wall inner tube 111 is inserted into the vacuum wall outer tube 112, and an interlayer is formed between the vacuum wall inner tube 111 and the vacuum wall outer tube 112, and the interlayer is a vacuum interlayer and plays a role in heat insulation. The rear heat insulating pipe 23 may also adopt the same structure: the vacuum wall inner pipe is arranged in the vacuum wall outer pipe in a penetrating way, and a vacuum interlayer is formed between the vacuum wall inner pipe and the vacuum wall outer pipe.
In the description herein, reference to the terms "an implementation," "an embodiment," "a specific implementation," "an example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (17)
1. A cryoablation needle with an adjustable target area, comprising: an adjusting component and a fixing component;
the adjustment assembly includes: a front heat insulation pipe and an adjusting device,
the fixing assembly includes: the cutter shell, the air inlet pipe fitting and the rear heat insulation pipe are arranged on the cutter shell;
the relative positions of the knife shell, the air inlet pipe fitting and the rear heat insulation pipe are fixed;
the far end of the knife shell is provided with a knife tip;
the far end of the front heat insulation pipe penetrates through the cutter shell, the far end of the front heat insulation pipe is the end, close to the cutter point, of the front heat insulation pipe, and a section of area between the far end of the front heat insulation pipe and the cutter point is a target area;
the near end of the front heat insulation pipe is positioned in the far end of the rear heat insulation pipe, and the far end of the rear heat insulation pipe is the end, close to the tool nose, of the rear heat insulation pipe;
the air inlet pipe fitting penetrates through the rear heat insulation pipe and the front heat insulation pipe, the far end of the air inlet pipe fitting extends out of the far end of the front heat insulation pipe, the near end of the air inlet pipe fitting extends out of the near end of the rear heat insulation pipe, and the far end of the air inlet pipe fitting is the end, close to the tool nose, of the air inlet pipe fitting;
the front insulated tube is switchable between at least two adjustment positions relative to the fixation assembly to adjust the length of the target zone;
the adjusting device is directly or indirectly connected with the front heat insulation pipe and can be controlled to drive the front heat insulation pipe to move along the axis direction of the front heat insulation pipe so as to switch the adjusting position of the front heat insulation pipe.
2. The targeted area adjustable cryoablation needle of claim 1, wherein the contact point of the front heat insulation tube with the adjusting device is located at an outer leakage front heat insulation tube, and the outer leakage front heat insulation tube is a part of the front heat insulation tube which leaks from the blade shell and the rear heat insulation tube;
the adjusting device comprises: and a roller unit, wherein part of the roller unit can be controlled to rotate, and friction force is generated between the roller unit and the front heat insulation pipe so as to drive the front heat insulation pipe to move along the axis direction of the front heat insulation pipe.
3. The targeted area adjustable cryoablation needle of claim 2 wherein the roller unit comprises: the first gear fixing plate, the first main roller, the first auxiliary roller, the first gear, the second gear, the third gear, the first internal gear, the first synchronizing wheel, the second synchronizing wheel, the first gear connecting shaft, the first synchronizing belt and the first synchronizing wheel rotating shaft are arranged on the first gear fixing plate; wherein the content of the first and second substances,
the first main roller and the first auxiliary roller are respectively arranged on the first gear fixing plate, and are respectively arranged on two opposite sides of the front heat insulation pipe;
the first gear connecting shaft is fixed on the first gear fixing plate;
the first gear and the second gear are respectively installed on two opposite sides of the first main roller in a tight fit manner, the third gear is installed on the first auxiliary roller in a tight fit manner, the first gear is meshed with the third gear, and the second gear is meshed with the first inner gear;
the first synchronous wheel and the second synchronous wheel are respectively arranged on the inner sides of two ends of the first synchronous belt, the first synchronous wheel and the first internal gear are sleeved on the first gear connecting shaft, the first synchronous wheel and the first internal gear are coaxially fixed, and the second synchronous wheel is sleeved on a first synchronous wheel rotating shaft;
the first synchronous belt can be controlled to drive the first synchronous wheel and the second synchronous wheel to rotate so as to drive the first inner gear to rotate, further drive the second gear, the first main roller and the first gear to be linked, further drive the third gear to rotate, further drive the first auxiliary roller to rotate, wherein the rotation direction of the first auxiliary roller is opposite to that of the first main roller, and the front heat insulation pipe is driven to move along the axis direction through friction among the first main roller, the first auxiliary roller and the front heat insulation pipe.
4. The targeted area adjustable cryoablation needle of claim 3 wherein the first synchronization strip has graduations disposed thereon.
5. The targeted area adjustable cryoablation needle of claim 2 wherein the roller unit comprises: the second gear fixing plate, the second main roller, the second auxiliary roller, the fourth gear, the fifth gear, the sixth gear, the second internal gear and the second gear connecting shaft are arranged on the first gear fixing plate; wherein the content of the first and second substances,
the second main roller and the second auxiliary roller are respectively arranged on the second gear fixing plate and are respectively arranged on two opposite sides of the front heat insulation pipe;
the second gear connecting shaft is fixed on the second gear fixing plate;
the fourth gear and the fifth gear are respectively and tightly installed on two opposite sides of the second main roller wheel, the sixth gear is tightly installed on the second auxiliary roller wheel, the fourth gear is meshed with the sixth gear, and the fifth gear is meshed with the second inner gear;
the second internal gear can be controlled to drive the fifth gear, the second main roller and the fourth gear are linked to further drive the sixth gear to rotate so as to drive the second auxiliary roller to rotate, the rotation direction of the second auxiliary roller is opposite to that of the second main roller, and the front heat insulation pipe is driven to move along the axis direction through friction force between the second main roller and the second auxiliary roller and the front heat insulation pipe.
6. The targeted area adjustable cryoablation needle of claim 5, wherein the roller unit further comprises: the third synchronous wheel, the fourth synchronous wheel, the second synchronous belt and the second synchronous wheel rotating shaft are arranged on the frame; wherein the content of the first and second substances,
the third synchronous wheel and the fourth synchronous wheel are respectively arranged on the inner sides of two ends of the second synchronous belt, the third synchronous wheel and the second internal gear are sleeved on the second gear connecting shaft, the third synchronous wheel and the second internal gear are coaxially fixed, and the fourth synchronous wheel is sleeved on the second synchronous wheel rotating shaft;
the second internal gear can be controlled to drive the third synchronous wheel to link, so that the second synchronous belt is driven to rotate, and the fourth synchronous wheel is driven to rotate;
and scales are arranged on the second synchronous belt.
7. The targeted area adjustable cryoablation needle of any one of claims 1 to 6, wherein the posterior heat insulating tube comprises: the first straight pipe, the bent pipe and the second straight pipe are distributed in sequence from the far end to the near end of the rear heat insulation pipe;
the part, which is the farthest away from the proximal end of the front heat insulation pipe, does not exceed the proximal end of the first straight pipe, and the proximal end of the first straight pipe is the end, far away from the knife tip, of the first straight pipe.
8. The targeted area adjustable cryoablation needle of any of claims 1 to 6, further comprising: the handle, the back heat insulation pipe wears to locate in the handle.
9. The targeted area adjustable cryoablation needle of claim 8, wherein the fixation assembly further comprises: an air return pipe;
the muffler is arranged in the rear heat insulation pipe in a penetrating mode, the far end of the muffler is located in the rear heat insulation pipe, the near end of the muffler extends out of the rear heat insulation pipe, and the far end of the muffler is the end, close to the tool nose, of the muffler.
10. The targeted area adjustable cryoablation needle of claim 9, wherein the fixation assembly further comprises: a handle rear end cap covering a proximal end of the handle;
the air inlet pipe fitting, the air return pipe and the rear heat insulation pipe are connected with the handle rear end cover in a sealing mode.
11. The targeted region adjustable cryoablation needle of any of claims 1 to 6, wherein the fixation assembly further comprises: a front sealing device and a rear sealing device; wherein the content of the first and second substances,
the front sealing device is used for dynamically sealing between the cutter shell and the front heat insulation pipe; the rear sealing device is used for dynamic sealing between the front heat insulation pipe and the rear heat insulation pipe.
12. The targeted area adjustable cryoablation needle of claim 11 wherein the front sealing means comprises: the first sealing ring front baffle, the first sealing ring rear baffle and the first sealing ring; and/or, the rear sealing device comprises: the front baffle of the second sealing ring, the rear baffle of the second sealing ring and the second sealing ring; wherein the content of the first and second substances,
the front baffle of the first sealing ring and the rear baffle of the first sealing ring are positioned at two opposite sides of the first sealing ring, the first sealing ring is sleeved on the outer wall of the front heat-insulation pipe, the inner wall of the first sealing ring is hermetically connected with the outer wall of the front heat-insulation pipe, and the outer wall of the first sealing ring is hermetically connected with the inner wall of the cutter shell;
the baffle before the second sealing washer, second sealing washer backplate is located the relative both sides of second sealing washer, the second sealing washer cover is located the outer wall of preceding thermal-insulated pipe, the inner wall of second sealing washer with the outer wall sealing connection of preceding thermal-insulated pipe, the outer wall of second sealing washer with the inner wall sealing connection of back thermal-insulated pipe.
13. The targeted region adjustable cryoablation needle of any of claims 1 to 6, wherein the fixation assembly further comprises: and the limiting device is arranged on the inner wall of the cutter shell and used for limiting the farthest distance of the front heat insulation pipe moving towards the direction of the cutter point.
14. The targeted region adjustable cryoablation needle of any of claims 1 to 6, wherein the air inlet tube comprises: J-T grooves, finned tubes and air inlet pipes; wherein the content of the first and second substances,
the J-T grooves, the finned tubes and the air inlet pipe are distributed in sequence from the far end to the near end of the air inlet pipe fitting;
the two ends of the finned tube are respectively connected with the near end of the J-T groove and the far end of the air inlet pipe, the near end of the J-T groove is the end, far away from the tool tip, of the J-T groove, and the far end of the air inlet pipe is the end, close to the tool tip, of the air inlet pipe.
15. The targeted area adjustable cryoablation needle of claim 14, wherein the fixation assembly further comprises: a mandrel inserted from a proximal end of the rear heat shield pipe;
the finned tube is wound into a plurality of spiral coils, and the mandrel penetrates through the spiral coils of the finned tube.
16. The targeted area adjustable cryoablation needle of claim 15 wherein the mandrel is filled with glue for sealing.
17. The targeted area adjustable cryoablation needle of any of claims 1 to 6, further comprising: a temperature measuring line;
the far end of the temperature measuring line is a temperature measuring point; the far end of the temperature measuring line is the end of the temperature measuring line close to the cutter tip;
the temperature measuring point is arranged at the far end of the front heat insulation pipe and is used for measuring the temperature at the far end of the front heat insulation pipe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210275285.4A CN114343823A (en) | 2022-03-21 | 2022-03-21 | Cryoablation needle with adjustable target area |
| CN202211721162.5A CN116098696A (en) | 2022-03-21 | 2022-12-30 | Cryoablation needle with adjustable targeting zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210275285.4A CN114343823A (en) | 2022-03-21 | 2022-03-21 | Cryoablation needle with adjustable target area |
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| Publication Number | Publication Date |
|---|---|
| CN114343823A true CN114343823A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210275285.4A Pending CN114343823A (en) | 2022-03-21 | 2022-03-21 | Cryoablation needle with adjustable target area |
| CN202211721162.5A Pending CN116098696A (en) | 2022-03-21 | 2022-12-30 | Cryoablation needle with adjustable targeting zone |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211721162.5A Pending CN116098696A (en) | 2022-03-21 | 2022-12-30 | Cryoablation needle with adjustable targeting zone |
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| CN (2) | CN114343823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115192173A (en) * | 2022-07-07 | 2022-10-18 | 上海市胸科医院 | Ablation needle with adjustable needle head position |
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| CN110604613A (en) * | 2019-08-13 | 2019-12-24 | 上海导向医疗***有限公司 | Curved adjustable cryoablation needle |
| CN113729966A (en) * | 2021-09-06 | 2021-12-03 | 上海交通大学 | Parallel progressive replaceable cardiovascular interventional operation robot and control method |
| CN113768610A (en) * | 2021-11-11 | 2021-12-10 | 上海导向医疗***有限公司 | Cryoablation needle with adjustable vacuum wall position |
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2022
- 2022-03-21 CN CN202210275285.4A patent/CN114343823A/en active Pending
- 2022-12-30 CN CN202211721162.5A patent/CN116098696A/en active Pending
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| US20120310230A1 (en) * | 2011-06-01 | 2012-12-06 | Angiodynamics, Inc. | Coaxial dual function probe and method of use |
| US20180310977A1 (en) * | 2017-04-28 | 2018-11-01 | Kyphon SÀRL | Introducer and cryoprobe |
| CN110478028A (en) * | 2019-08-13 | 2019-11-22 | 上海导向医疗***有限公司 | A kind of curved adjustable freezing ablation needle |
| CN110604613A (en) * | 2019-08-13 | 2019-12-24 | 上海导向医疗***有限公司 | Curved adjustable cryoablation needle |
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| Publication number | Publication date |
|---|---|
| CN116098696A (en) | 2023-05-12 |
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Application publication date: 20220415 |