CN114470480B - Adjustable curved sheath pipe with accurate control of curve - Google Patents
Adjustable curved sheath pipe with accurate control of curve Download PDFInfo
- Publication number
- CN114470480B CN114470480B CN202210060801.1A CN202210060801A CN114470480B CN 114470480 B CN114470480 B CN 114470480B CN 202210060801 A CN202210060801 A CN 202210060801A CN 114470480 B CN114470480 B CN 114470480B
- Authority
- CN
- China
- Prior art keywords
- sheath
- developing
- distal end
- sheath tube
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005452 bending Methods 0.000 claims abstract description 33
- 238000010586 diagram Methods 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000013152 interventional procedure Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000004789 organ system Anatomy 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0136—Handles therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0108—Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
- A61M2025/015—Details of the distal fixation of the movable mechanical means
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses an adjustable bent sheath tube with accurate bending control, wherein a connection node between a stay wire in the adjustable bent sheath tube and the distal end of the sheath tube can slide around the wall of the distal end of the sheath tube; the adjustable curved sheath tube is provided with a developing ring with a directional directivity mark, and the developing ring can display the curved state of the distal end of the sheath tube under X rays. The invention solves the problem that the distal end of the sheath tube rotates to a certain extent when being bent.
Description
Technical Field
The invention belongs to the technical field of interventional medical instruments, and particularly relates to an adjustable bending sheath tube capable of accurately controlling bending.
Background
Minimally invasive interventional procedures are used for diagnosis and treatment in almost every organ system of the human body, and the main procedure is to perform the operation by delivering diagnostic and therapeutic instruments to a target site with the aid of X-ray images, and then delivering the diagnostic and therapeutic instruments to the target site through a guide wire, sheath, etc.
In a typical pull-wire controlled bend sheath, a pull-wire ring is secured to the distal end of the sheath, and a pull-wire is secured to the pull-wire ring in a symmetrical position and extends to the proximal end of the sheath, with movement of the pull-wire being controlled by a proximal handle to control deflection of the distal sheath.
For example, chinese patent document CN109984823a discloses a method of using at least one section of traction wire to be free outside the sheath tube body to solve the controllability of the distal end bending of the sheath tube, so as to improve the easiness of bending control.
In current practice, to avoid increasing the overall outer diameter profile of the sheath and to improve the passage of the sheath within the vessel, one or more pull wires extend proximally from the distal end of the sheath through the tubing in the body of the tube. When the sheath tube body is in a natural state, the stay wire on one side is shortened, and the distal end of the sheath tube is bent towards the stay wire on the shortened side. Because the human blood vessel is tortuous, under certain circumstances, the operator can apply certain moment of torsion for the sheath, and the stay wire also can appear turning to the moment, and when the rethread stay wire was controlled to bend, the bending of sheath distal end can take place the rotation of certain degree to lead to the operator unable accurate accuse bending direction of sheath distal end, bring the difficulty for the accuracy of operation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an adjustable bent sheath tube with accurate bending control for overcoming the defects in the prior art, and the problem that the distal end of the sheath tube rotates to a certain extent when being bent is solved.
In order to solve the technical problems, the invention adopts the following technical scheme: an adjustable bent sheath tube with accurate bending control, wherein a connection node between a stay wire in the adjustable bent sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube; the adjustable curved sheath tube is provided with a developing ring with a directional directivity mark, and the developing ring can display the curved state of the distal end of the sheath tube under X rays.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, act as go-between and sheath pipe distal end is through acting as go-between the ring connection, the waist of acting as go-between has annular groove, the distal end of acting as go-between has arc slider, and arc slider inlays in the recess of acting as go-between ring waist.
The adjustable curved sheath tube with accurate bending control is characterized in that two ends of a bendable section of the adjustable curved sheath tube are respectively provided with one developing ring.
The adjustable curved sheath tube with the accurate bending control function is characterized in that the developing ring comprises an annular part and a developing mark part fixed at the middle position of one side of the annular part, and the developing mark part is perpendicular to the annular part.
The adjustable curved sheath tube with accurate bending control is characterized in that the developing mark parts of the two developing rings are positioned at the rear side of the annular part, and the rear side refers to one side of the annular part far away from the distal end of the sheath tube.
The adjustable curved sheath tube with accurate control of the curvature is characterized in that the developing mark parts of the two developing rings are positioned at the front side of the annular part, and the front side refers to one side of the annular part close to the distal end of the sheath tube.
The above-mentioned accurate curved adjustable sheath pipe of accuse, one developing ring's developing mark portion is located its annular portion's front side, another developing ring's developing mark portion is located its annular portion's rear side, the rear side refers to one side that annular portion kept away from the sheath pipe distal end, the front side refers to one side that annular portion is close to the sheath pipe distal end.
Compared with the prior art, the invention has the following advantages: according to the adjustable bending sheath, the connection node of the stay wire and the distal end of the sheath can slide around the wall of the distal end of the sheath, namely, the stay wire is fixed on the stay wire ring at the distal end of the sheath in a mode that the head end of the stay wire is movably embedded in the groove on the stay wire ring wall, so that when the bending is controlled by operation, the head end of the stay wire can slide along the groove on the stay wire ring wall, and when the sheath body is distorted, the torque energy stored on the stay wire is released through the sliding of the distal end of the stay wire, and the direction consistent with the bending control direction of the handle is realized. In addition, by designing a developable mark on the circumference of the sheath, the operator can be helped to recognize the bending control direction in the three-dimensional space of the sheath under the two-dimensional X-ray image. Further helping the operator to judge whether the distal end of the sheath tube generates in-plane torsion and control bending, thereby realizing accurate control.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of an adjustable bend sheath of the present invention.
FIG. 2 is a schematic view of the sheath twisting and bending control when the distal end of the pull wire is not movably fixed to the pull wire ring.
FIG. 3 is a schematic view of an example of a pull wire with a distal end slidably mounted on a pull wire annular wall.
Fig. 4 is a schematic view of controlling bending of the sheath tube when the end of the pull wire is slidably embedded in the pull wire annular wall.
Fig. 5 is a position diagram of the developing ring in the normal state of the sheath.
Fig. 6 is a position diagram of the developing ring in the bent state of the sheath.
Fig. 7 is a structural view of a developing ring having directional directivity.
Fig. 8 is a view showing the relative positions of two developing rings after the sheath management is expected to bend, as seen in an X-ray two-dimensional image.
Fig. 9 is a diagram showing the relative positions of two developing rings after a twisting and bending of the sheath tube, which is seen under an X-ray two-dimensional image.
Fig. 10 is a diagram showing the relative positions of two developing rings after another twisting and bending of the sheath tube, which is seen under an X-ray two-dimensional image.
Reference numerals illustrate 1-stay wire; 2-sheath; 3-a handle; 4-pulling a wire loop; 5-an annular groove; 6-sliding blocks; 7-developing ring; 7-1-a ring portion; 7-2-developing mark portion.
Detailed Description
The precise bending control adjustable sheath tube provided by the invention is further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, so that the same similar parts of each embodiment are referred to each other.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
An adjustable bent sheath tube with accurate bending control, wherein a connection node of a stay wire 1 in the adjustable bent sheath tube and the distal end of the sheath tube 2 can slide around the wall of the distal end of the sheath tube 2.
Specifically, as shown in fig. 1 and 3, the adjustable bent sheath tube comprises a handle 3 and a sheath tube 2, two sides of the sheath tube 2 are respectively provided with a stay wire 1, the stay wire 1 is a round wire or a flat wire, the distal end of the sheath tube 2 is provided with a stay wire ring 4, the distal end of the stay wire 1 is slidably connected to the stay wire ring 4, and the proximal end of the stay wire 1 extends to the handle 3 through a cavity in the tube body of the sheath tube 2 to be fixed.
In the conventional wire 1 for controlling the bending of the sheath 2, the wire 1 is under tension when the bending is controlled, and when an operator further applies a certain torque to the sheath 2, the distal end of the wire 1 is fixed to the distal end of the sheath 2, so that the wire 1 is twisted and rotated in the circumferential direction of the sheath 2 in the sheath 2, and the distal end of the sheath 2 is deflected in three dimensions along with the bending control operation, so that the state shown in fig. 2 is generated. In order to solve the problem, in this embodiment, as shown in fig. 3, an annular groove 5 is formed on the pull wire ring 4, a sliding block 6 capable of sliding along the annular groove 5 is disposed in the annular groove 5, and the distal end of the pull wire 1 is fixed on the sliding block 6, so that when the sheath 2 is twisted, the sliding block 6 slides to enable the pull wire 1 to release torque energy, thereby avoiding the problem of fig. 2, and the state of the pull wire 1 is shown in fig. 4. The distal end of the stay wire 1 and the stay wire ring 4 can be slidably connected in various manners, and the stay wire can be in a key ring hanging piece similar structure, or can be in a curtain hanging piece similar structure and can be expanded.
As shown in fig. 5 and 6, in the present embodiment, both ends of the bendable section of the bendable sheath tube 2 are provided with developing rings 7 having directional directivity. The structure of the developing ring 7 is specifically shown in fig. 7.
In this embodiment, the developing ring 7 includes an annular portion 7-1 and a developing mark portion 7-2 fixed at an intermediate position on one side of the annular portion 7-1.
The developing mark can be made of metal (gold, tungsten, tantalum and bismuth) or powder (tungsten powder, barium sulfate and bismuth oxide) thermoplastic polymer. The developed indicia may be in a variety of distinguishable shapes. The developing marks having directional directivity may be various distinguishable shapes. In this example, the direction perpendicular to the annular portion of the developing ring may be a triangle, an arrow, or the like, which can distinguish directivity under X-rays.
In this embodiment, the developing ring 7 has a "T" shape under an X-ray two-dimensional image, and the twisting of the sheath tube 2 is recognized based on the relative positions of the two protruding portions.
In this embodiment, the developing marks 7-2 of the two developing rings 7 are located at the rear side of the annular portion 7-1, and the rear side refers to the side of the annular portion 7-1 away from the distal end of the sheath tube 2.
It will be appreciated by those skilled in the art that the development mark portions of both of the development rings may also be located on the front side of the annular portion, which is the side of the annular portion that is adjacent to the distal end of the sheath; or the developing mark part of one developing ring is positioned at the front side of the annular part of the developing ring, and the developing mark part of the other developing ring is positioned at the rear side of the annular part of the developing ring.
In practical use, in an ideal state, after the distal end of the sheath tube 2 is bent, the relative positions of the two developing rings 7 are shown in fig. 8 under the X-ray two-dimensional image, and when the conditions shown in fig. 9 and 10 appear, the sheath tube 2 is illustrated to be twisted when being bent, and an operator can correct the deflection of the sheath tube 2 according to the requirement, so that more accurate bending control is realized.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (5)
1. An adjustable curved sheath pipe of accurate accuse bending, its characterized in that: the connecting node of the stay wire in the adjustable bent sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube, the stay wire is connected with the distal end of the sheath tube through a stay wire ring, the waist of the stay wire ring is provided with an annular groove, the distal end of the stay wire is provided with an arc-shaped sliding block, the arc-shaped sliding block is embedded in the groove of the waist of the stay wire ring, and the stay wire extends to the proximal end through a tube body cavity; the developing ring with the directional directivity mark is arranged in the bendable sheath tube, the developing ring can display the bending state of the distal end of the sheath tube under X rays, and two ends of the bendable section of the bendable sheath tube are respectively provided with one developing ring.
2. An adjustable bend sheath with precisely controlled bending as set forth in claim 1, wherein: the developing ring comprises an annular part and a developing mark part fixed at the middle position of one side of the annular part, and the developing mark part is perpendicular to the annular part.
3. An adjustable bend sheath for precisely controlling bending according to claim 2, wherein: the developing mark parts of the two developing rings are positioned at the rear side of the annular part, and the rear side refers to one side of the annular part far away from the distal end of the sheath tube.
4. An adjustable bend sheath for precisely controlling bending as set forth in claim 3, wherein: the developing mark parts of the two developing rings are positioned at the front side of the annular part, and the front side refers to one side of the annular part close to the distal end of the sheath tube.
5. An adjustable bend sheath for precisely controlling bending as set forth in claim 4, wherein: the developing mark part of one developing ring is positioned at the front side of the annular part of the developing ring, the developing mark part of the other developing ring is positioned at the rear side of the annular part of the developing ring, the rear side refers to one side of the annular part far away from the distal end of the sheath, and the front side refers to one side of the annular part near the distal end of the sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060801.1A CN114470480B (en) | 2022-01-19 | 2022-01-19 | Adjustable curved sheath pipe with accurate control of curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060801.1A CN114470480B (en) | 2022-01-19 | 2022-01-19 | Adjustable curved sheath pipe with accurate control of curve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114470480A CN114470480A (en) | 2022-05-13 |
| CN114470480B true CN114470480B (en) | 2024-06-11 |
Family
ID=81473238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060801.1A Active CN114470480B (en) | 2022-01-19 | 2022-01-19 | Adjustable curved sheath pipe with accurate control of curve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114470480B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863079A (en) * | 1994-08-18 | 1996-03-08 | Ricoh Co Ltd | Rotary developing device |
| US5904667A (en) * | 1997-03-17 | 1999-05-18 | C.R. Bard, Inc. | Rotatable control mechanism for steerable catheter |
| CN109984823A (en) * | 2018-01-03 | 2019-07-09 | 杭州启明医疗器械股份有限公司 | It is a kind of to adjust curved sheath and the transportation system using the curved sheath of the tune |
| CN213283248U (en) * | 2020-06-22 | 2021-05-28 | 康沣生物科技(上海)有限公司 | Adjustable bent sheath pipe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381198B2 (en) * | 2000-08-23 | 2008-06-03 | Revascular Therapeutics, Inc. | Steerable distal support system |
| US8029461B2 (en) * | 2008-01-11 | 2011-10-04 | Joseph Michael Thielen | Closable loop access guide catheter |
| JP5245138B2 (en) * | 2008-03-19 | 2013-07-24 | 哲丸 宮脇 | Endoscope |
| US8894610B2 (en) * | 2012-11-28 | 2014-11-25 | Hansen Medical, Inc. | Catheter having unirail pullwire architecture |
-
2022
- 2022-01-19 CN CN202210060801.1A patent/CN114470480B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863079A (en) * | 1994-08-18 | 1996-03-08 | Ricoh Co Ltd | Rotary developing device |
| US5904667A (en) * | 1997-03-17 | 1999-05-18 | C.R. Bard, Inc. | Rotatable control mechanism for steerable catheter |
| CN109984823A (en) * | 2018-01-03 | 2019-07-09 | 杭州启明医疗器械股份有限公司 | It is a kind of to adjust curved sheath and the transportation system using the curved sheath of the tune |
| CN213283248U (en) * | 2020-06-22 | 2021-05-28 | 康沣生物科技(上海)有限公司 | Adjustable bent sheath pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114470480A (en) | 2022-05-13 |
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