CN115444491B - Clamping assembly and hemostatic device for endoscope - Google Patents
Clamping assembly and hemostatic device for endoscope Download PDFInfo
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- CN115444491B CN115444491B CN202211239673.3A CN202211239673A CN115444491B CN 115444491 B CN115444491 B CN 115444491B CN 202211239673 A CN202211239673 A CN 202211239673A CN 115444491 B CN115444491 B CN 115444491B
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- 230000002439 hemostatic effect Effects 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 230000000670 limiting effect Effects 0.000 claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000011148 porous material Substances 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 210000005069 ears Anatomy 0.000 description 14
- 206010052428 Wound Diseases 0.000 description 8
- 208000027418 Wounds and injury Diseases 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000023597 hemostasis Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 230000003872 anastomosis Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
- A61B17/1285—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
- A61B17/12013—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot for use in minimally invasive surgery, e.g. endoscopic surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B2017/12004—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for haemostasis, for prevention of bleeding
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Clamps And Clips (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to the technical field of medical equipment, and provides a clamping assembly, and in addition, the invention also relates to a hemostatic device for an endoscope, which comprises the clamping assembly, wherein the clamping assembly comprises a sleeve, a jaw frame, a connecting shaft and a transmission mechanism, the rear end of the jaw frame can be arranged in an inner hole of the sleeve in a back-and-forth moving way, and a positioning piece is embedded into a positioning groove, so that the connecting shaft axially positions a limiting bulge between a step surface and the front end part of the connecting shaft; and at least a portion of the arm is positioned outside the inner bore to allow the arm to rotate in the opening direction when the operating wire moves forward; when the clamp head frame is in the release position, the two clamp arms are closed to clamp human tissues, the inner holes are sleeved outside the clamp arms to prevent the clamp arms from rotating along the opening direction, and the locating piece can locate the clamp head frame in the operation position and can control the clamp head frame in the release position, so that the structure is simplified, the failure rate is reduced, the cost is reduced, and the success rate of clamping and closing is improved.
Description
Technical Field
The invention relates to the technical field of medical equipment, and provides a clamping assembly, and in addition, relates to a hemostatic device for an endoscope, which comprises the clamping assembly.
Background
The anastomosis clip is usually matched with an endoscope for use, is used for clamping various bleeding, fistulae, perforations and the like on the wall of the alimentary canal, has the advantages of quick suture, simple and convenient operation, low side effect, less operation complications and the like, can effectively relieve the pain of patients and shortens the hospitalization time. Compared with the hemostatic clip for the endoscope, the hemostatic clip is particularly suitable for hemostasis and anastomosis of large wounds, and the wound which can be clamped by 3 to 5 hemostatic clips is usually clamped by 1 hemostatic clip, so that the surgical time of a patient can be greatly shortened, and the pain of the patient is reduced.
Chinese patent publication No. CN111481304a discloses a three-arm clamp, which includes a clamping assembly and a release member that are connected to each other, the clamping assembly includes a fixed arm and two movable arms that are respectively connected to the fixed arm by rotation through pins, and when a target is confirmed, the movable arms are driven to rotate, and the distal ends of the movable arms are closed toward the fixed arm to clamp the target; the proximal end of the movable arm is also provided with a spring piece, and when the movable arm rotates along the pin shaft to clamp and close with the fixed arm, the spring piece is gradually folded in the inner cavity and props against the release piece; finally, the elastic propping between the elastic sheet and the inner wall of the inner cavity effectively ensures that the elastic sheet is kept in the clamping component part in the body after the operation is finished.
According to the above description, the elastic piece of the three-arm clamp is always abutted against the release piece, so that certain friction force exists between the elastic piece and the release piece, and the friction force can influence the movement of the release piece, so that the release piece is not smooth to operate when the movable arm needs to be opened and closed, and meanwhile, the elastic piece of the movable wall and the release piece are easy to be severely worn or blocked.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that the operation is not smooth when the movable arm of the hemostatic device for the endoscope is opened and closed in the prior art, the invention provides a clamping assembly and also provides the hemostatic device for the endoscope, which comprises the clamping assembly.
The technical scheme adopted for solving the technical problems is as follows: a pinch-off assembly, comprising:
a sleeve, an inner hole with a step surface is formed in the sleeve, and a positioning piece capable of elastically deforming is arranged at the rear side of the step surface in the inner hole;
the rear end of the clamp head frame can be arranged in the inner hole in a back-and-forth moving way and is provided with a limiting bulge; the front end of the clamp head frame is hinged with two clamping arms;
the front end of the connecting shaft can be arranged in the inner hole in a back-and-forth movable way, and a positioning groove is formed in the outer peripheral wall of the front end of the connecting shaft;
the transmission mechanism is used for converting the movement of the operation wire into rotation of the driving clamping arm;
when the clamp head frame is in an operation position, the positioning piece is embedded into the positioning groove, so that the connecting shaft axially positions the limiting protrusion between the step surface and the front end part of the connecting shaft; and at least a portion of the clip arm is located outside the bore to permit the clip arm to rotate in an opening direction when the operating wire is moved forward or in a closing direction when the operating wire is moved rearward;
when the clamp head frame is in the release position, the two clamp arms are closed to clamp human tissues, the clamp head frame is driven by the operation wire backwards to overcome the resistance of the positioning sheet until the positioning sheet abuts against the front end face of the limiting boss, and the inner hole is sleeved outside the clamp arms to prevent the clamp arms from rotating in the opening direction.
Further, when the clamp head frame is in the operation position, the locating piece is propped against the locating groove forwards, and the front end face of the limiting protrusion is propped against the step face.
Further, a part of the bottom end of the peripheral wall of the sleeve is bent inwards to form a positioning sheet capable of being elastically deformed.
Further, the inner hole comprises a restraining hole section, a fine hole section and a rough hole section which are coaxially arranged;
the cross-sectional area of the constraint hole section gradually becomes smaller from front to back, the front end of the pore section is connected with the rear end of the constraint hole section, the rear end of the pore section is connected with the front end of the rough hole section, the cross-sectional area of the constraint hole section is more than or equal to the cross-sectional area of the pore section, and the cross-sectional area of the pore section is less than the cross-sectional area of the rough hole section; a step surface is formed at the joint between the fine pore section and the coarse pore section;
when the clamp head frame is in an operation position, the rear end of the clamp head frame is connected with the fine hole section, and the limiting bulge and the connecting shaft are connected with the coarse hole section;
the restraining hole section is used for being abutted by the clamping arm so as to prevent the clamping arm from rotating along the opening direction.
Further, the inner bore further comprises a pilot bore section;
the rear end of the guide hole section is coaxially connected with the front end of the constraint hole section, the guide hole section and the constraint hole section are tapered, and the taper of the guide hole section is larger than that of the constraint hole section.
Further, an intermediate arm is also included;
the middle arm is arranged on the clamp head frame and is positioned between the front ends of the two clamp arms;
the front end part of the clamping arm is provided with a head part which is bent inwards, the clamping arm rotates along the closing direction until the head part is aligned with the front end part of the middle arm, the rear end part of the head part is positioned at the front side of the front end part of the middle arm, and a gap is reserved between the rear end part of the head part and the front end part of the middle arm.
Further, the number of the clamping arms is two, the transmission mechanism comprises two transmission lines, the operation lines are in one-to-one correspondence with the clamping arms, each operation line is connected to a corresponding clamping arm through one transmission line, one end of each transmission line is fixedly connected with the operation line, and the other end of each transmission line is fixedly connected with the corresponding clamping arm;
the transmission line is set to be automatically disconnected when the tensile force received by the transmission line exceeds a preset value;
the front end of the clamp head frame extends forwards to form two side ears, the two clamping arms are located between the two side ears, and the clamping arms are hinged with the side ears of the clamp head frame.
Further, the transmission mechanism comprises two pull rods with detachable structures, the two operation wires are respectively and fixedly connected with one pull rod, and the pull rods are in one-to-one correspondence with the clamping arms;
a connecting rod is arranged between each pull rod and a corresponding clamping arm, one end of the connecting rod is hinged with the pull rod, and the other end of the connecting rod is hinged with the clamping arm.
The detachable structure is used for enabling the pull rod to be disconnected when the pulling force to which the pull rod reaches exceeds a preset value;
the front end of the clamp head frame extends forwards to form two side ears, the two clamping arms are located between the two side ears, and the clamping arms are hinged with the side ears of the clamp head frame.
Further, the transmission mechanism comprises two transmission lines, the operation lines are two and correspond to the clamping arms one by one, and each operation line is connected to a corresponding clamping arm through one transmission line;
the transmission line is set to be automatically disconnected when the tensile force received by the transmission line exceeds a preset value;
the clamp head frame is fixedly provided with a mounting plate, the mounting plate is positioned between two clamping arms, and the clamping arms are hinged with the mounting plate of the clamp head frame;
one side of the rear end of the clamping arm in the left-right direction is hinged with the mounting plate, the other side of the rear end of the clamping arm is fixedly connected with the front end of the transmission line, and the rear end of the transmission line is connected with the operation line.
The invention also provides a hemostatic device for an endoscope, which comprises the clamping assembly.
The beneficial effects of the invention are as follows:
on one hand, the positioning piece is embedded into the positioning groove of the connecting shaft, and the design of the limiting bulge on the clamp head frame is combined, so that the clamp head frame can be axially positioned in the inner hole of the sleeve with a certain binding force, and the positioning piece can not interfere the opening and closing of the clamp arm before the clamp arm is closed to clamp human tissues, thereby improving the smoothness of operation and better grasping tissue closure;
on the other hand, after the locating piece passes over the connecting shaft and the limiting bulge, the locating piece automatically butts against the limiting surface of the limiting bulge, so that the clamping arm is maintained in a closed state by the interference caused by the opening of the sleeve to the clamping arm; that is, the positioning piece not only can position the clamp head frame at the operation position, but also can control the clamp head frame at the release position, thereby simplifying the structure, reducing the failure rate, reducing the cost and improving the clamping success rate.
Other features of the present invention and its advantages are described in detail below in the detailed description of the exemplary embodiments.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a three-dimensional schematic view of a clamping assembly employing a first type of transmission mechanism;
FIG. 2 is a schematic front view of a clamping assembly employing a first type of transmission mechanism;
FIG. 3 is a schematic view of the sleeve, connecting shaft and spring tube in section of the clamping assembly employing the first transmission mechanism with the head frame in the operative position;
FIG. 4 is an enlarged partial schematic view of FIG. 3A;
FIG. 5 is a schematic illustration of a clamping assembly employing a first type of transmission mechanism with two clamping arms open;
FIG. 6 is an enlarged partial schematic view of B in FIG. 5;
FIG. 7 is a schematic illustration of the sleeve, connecting shaft, jaw housing and spring tube in section with the jaw housing in a released position using a first type of transmission mechanism;
FIG. 8 is an enlarged partial schematic view of C in FIG. 7;
FIG. 9 is a schematic view of the spring tube separated from the sleeve;
FIG. 10 is a schematic illustration of the cooperation of an intermediate wall with two clamp arms;
FIG. 11 is a schematic view of a sleeve;
FIG. 12 is a schematic illustration of a first transmission;
FIG. 13 is a three-dimensional schematic view of a clamping assembly employing a first type of transmission mechanism with a clamping arm mounted on a jaw frame;
FIG. 14 is a schematic view of the sleeve, connecting shaft, jaw housing and spring tube in section with the jaw housing in an operative position using a second type of drive mechanism;
FIG. 15 is a three-dimensional schematic view of a clamping assembly employing a second type of transmission mechanism with a clamping arm mounted on a jaw frame;
FIG. 16 is a schematic illustration of a second intermediate drive mechanism;
FIG. 17 is a schematic front view of a clamping assembly employing a third transmission mechanism with two clamping arms open;
FIG. 18 is a schematic front view of a clamp assembly employing a third drive mechanism with two clamp arms closed;
fig. 19 is a three-dimensional schematic view of a clamping assembly employing a third transmission mechanism with a clamping arm mounted on a jaw frame.
In the figure: 1. 1-1 parts of sleeve, 1-2 parts of guide hole section, 1-3 parts of constraint hole section, 1-3 parts of pore section, 1-4 parts of step surface, 1-5 parts of rough hole section, 1-6 parts of locating piece, 1-7 parts of flange;
2. 2-1 parts of a clamp head frame, 2-11 parts of a limiting projection, 2-2 parts of a limiting surface, 2-21 parts of a side lug, 2-3 parts of a stop projection and a mounting plate;
3. a clamping arm, 3-1, a head;
4. a connecting shaft, 4-1 and a positioning groove;
5. a middle arm;
6. a gap;
7. a drive line;
8. an operation wire;
9. a pull rod, 9-1, a notch;
10. a spring tube;
11. and a connecting rod.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
As shown in fig. 1-19, a clamping assembly comprises a sleeve 1, a jaw frame 2, a connecting shaft 4 and a transmission mechanism;
as shown in fig. 11, the inside of the sleeve 1 is penetrated in a step manner, namely, the sleeve 1 is provided with an inner hole with a step surface 1-4, and a positioning piece 1-6 which is elastically deformable is arranged at the rear side of the step surface 1-4 in the inner hole;
as shown in fig. 3 and 4, the rear end of the jaw frame 2 is movably disposed in the inner hole, for example, the rear end of the jaw frame 2 can be slidably connected with the inner hole along the front-rear direction, the cross section of the inner hole can be circular, and correspondingly, the cross section of the part where the jaw frame 2 is slidably connected with the inner hole is also circular; the rear end of the clamp head frame 2 is provided with a limiting bulge 2-1, and the front end surface of the limiting bulge 2-1 is a limiting surface 2-11 which is used for being connected with a step surface 1-4 or a locating piece 1-6; as shown in fig. 4, the rear end of the limiting protrusion 2-1 may have a tapered surface with a large front end and a small rear end, and the tapered surface is used for guiding the positioning sheet 1-6 to the limiting surface 2-11 relatively easily in the process that the limiting protrusion 2-1 moves backward, compared with the process that the tapered surface is not provided, that is, the rear end of the limiting protrusion 2-1 is still in a straight prism shape; the front end of the jaw frame 2 is hinged with two clamping arms 3, and the clamping arms 3 are used for clamping tissues so as to close a large wound;
the front end of the connecting shaft 4 can move back and forth and is configured in the inner hole, a positioning groove 4-1 is formed in the peripheral wall of the front end of the connecting shaft 4, and the rear end of the connecting shaft 4 is in clearance fit with the operating component, so that the connecting shaft 4 cannot be blocked by the front end of the operating component in the backward moving process, and the condition that the jaw frame 2 and the clamping arm 3 cannot be released is caused;
the transmission mechanism is used for converting the movement of the operation wire 8 into the rotation of the driving clamp arm 3, the operation wire 8 can be, but not limited to, a steel wire, and the operation wire 8 of the type in the prior art can also be adopted;
as shown in fig. 2-6, when the jaw frame 2 is in an initial operation position (the clamping arm 3 has not completed tissue clamping or releasing), the positioning piece 1-6 is embedded into the positioning groove 4-1 at this time, so that the connecting shaft 4 connects the jaw frame 2 and the operation assembly together relatively, at this time, the limiting protrusion 2-1 is axially positioned between the step surface 1-4 and the front end of the connecting shaft 4, the positioning groove 4-1 can be specifically an annular groove and surrounds the peripheral wall of the connecting shaft 4, thus, the positioning piece 1-6 and the positioning groove 4-1 can be conveniently assembled in a matched manner, and in the process that the jaw frame 2 and the clamping arm 3 are retracted to the sleeve 1 until releasing, the alignment assembly is not needed, and the operation is simplified; at least a portion of the arm 3 is located outside the bore to allow the arm 3 to rotate in the opening direction as the wire 8 moves forward, in which case tissue is received; or rotates in the closing direction when the operating wire 8 moves backward, at which time the tissue is clamped, ready for separation;
as shown in fig. 7-8, when the clip head frame 2 is in the operable release position, the two clip arms 3 are closed to clip human tissue, and the clip head frame 2 is driven by the operating wire 8 backward to overcome the resistance of the positioning sheet 1-6 until the positioning sheet 1-6 abuts against the front end face of the limiting projection 2-1, and the inner hole is sleeved outside the clip arms 3 to prevent the clip arms 3 from rotating in the opening direction.
It should be noted that, in this embodiment, the rotation of the arm 3 in the closing direction and the rotation in the opening direction are defined as follows: the hinge point between the clamp arm 3 and the clamp head frame 2 is a first hinge point, the part, located at the front side of the first hinge point, of the clamp arm 3 is the front end of the clamp arm 3, the part, located at the rear side of the first hinge point, of the clamp arm 3 is the rear end of the clamp arm 3, rotation of any one clamp arm 3 along the closing direction can be represented as gradually decreasing the distance between the front ends of the two clamp arms 3, and rotation of any one clamp arm 3 along the opening direction can be represented as gradually increasing the distance between the front ends of the two clamp arms 3.
The clamping assembly is used when:
in the initial state, as shown in fig. 2-4, the positioning sheet 1-6 is embedded into the positioning groove 4-1 of the connecting shaft 4, the clamp head frame 2 is positioned at the operation position, as shown in fig. 5 and 6, when the operation wire 8 is pulled to move backwards, the clamp arm 3 rotates along the closing direction until the human tissue is clamped; if the tissue is required to be clamped again, the operation wire 8 can be pushed to move forwards, and the clamping arm 3 can rotate along the opening and closing direction to realize re-opening;
as shown in fig. 7 and 8, in a state that the clamp arm 3 is closed to clamp the human tissue, once the human tissue is clamped, the clamp arm 3 cannot continue to rotate in the closing direction, and as the pulling force applied to the operation wire 8 to move the jaw frame 2 backward is increased, the jaw frame 2 drives the connecting shaft 4 to move backward against the resistance of the positioning piece 1-6 until the jaw frame 2 moves backward until the limiting boss 2-1 passes over the positioning piece 1-6, the positioning piece 1-6 abuts against the limiting surface 2-11 of the limiting boss 2-1 to prevent the jaw frame 2 from moving forward, and the clamp arm 3 is maintained in the closed state, and at this time, the sleeve 1 is sleeved outside the clamp arm 3 to prevent the clamp arm 3 from rotating in the opening direction.
According to the clamping assembly, on one hand, the positioning piece 1-6 is embedded into the positioning groove 4-1 of the connecting shaft 4, and the design of the limiting protrusion 2-1 on the clamp head frame 2 is combined, so that the clamp head frame 2 can be axially positioned in the inner hole of the sleeve 1 with a certain binding force, and the clamp arm 3 can be ensured not to interfere the opening and closing of the clamp arm 3 before the closing of the clamp arm 3 to clamp human tissues is completed, so that the smoothness of operation is improved, and the tissue can be better clamped and closed; on the other hand, after the locating piece 1-6 passes over the connecting shaft 4 and the limiting bulge 2-1, the locating piece automatically butts against the limiting surface 2-11 of the limiting bulge 2-1, so that the clamping arm 3 is maintained in a closed state by interference caused by the sleeve 1 on the opening of the clamping arm 3; that is, the positioning pieces 1 to 6 are capable of positioning the jaw frame 2 not only in the operation position but also in the release position, thereby simplifying the structure, reducing the failure rate, reducing the cost, and improving the success rate of the clamping.
For a better understanding of the clamping assembly of the present embodiment, it is further explained and illustrated below;
in some embodiments, as shown in fig. 4, when the jaw frame 2 is in the operation position, the positioning piece 1-6 is propped against the positioning groove 4-1 forward, and the front end face of the limiting protrusion 2-1 is propped against the step face 1-4; thereby enabling the jaw housing 2 to be positioned axially within the sleeve 1.
In some embodiments, as shown in fig. 4 and 8, a part of the bottom end of the peripheral wall of the sleeve 1 is folded inwards to form a positioning sheet 1-6 capable of elastic deformation; therefore, after the locating piece 1-6 passes through the connecting shaft 4 and the limiting bulge 2-1, the clamp head frame 2 can be allowed to have certain axial displacement deviation, and in the axial displacement deviation range, the locating piece 1-6 can automatically prop against the limiting surface 2-11 of the limiting bulge 2-1, so that the clamp arm 3 can be stably and firmly maintained in a closed state after clamping tissues with different sizes, and the clamp arm 3 is prevented from loosening;
specifically, as shown in fig. 4, in order to facilitate bending to form the positioning sheet 1-6, a window is formed on the bottom end of the peripheral wall of the sleeve 1, a part of the peripheral wall of the sleeve 1, where the window is located, is bent inwards to form the positioning sheet 1-6 capable of elastically deforming, one end of the positioning sheet 1-6 is connected with the inner wall of the front side of the window, and the positioning sheet 1-6 can be gradually inclined inwards from front to back, so that the positioning sheet is beneficial to crossing the positioning groove 4-1 and stably propping against the front end face of the limiting protrusion 2-1; the number of the positioning sheets 1-6 can be determined according to practical situations, for example, the positioning sheets 1-6 can be two or more and can be uniformly distributed along the circumferential direction of the sleeve 1, so that the stress uniformity is improved.
In some embodiments, as shown in FIG. 11, the inner bore includes coaxially disposed constraining-hole sections 1-2, fine-hole sections 1-3, and coarse-hole sections 1-5, the constraining-hole sections 1-2, fine-hole sections 1-3, and coarse-hole sections 1-5 each preferably being circular in cross section;
the cross-sectional area of the constraint hole section 1-2 gradually becomes smaller from front to back, the front end of the pore section 1-3 is connected with the rear end of the constraint hole section 1-2, the rear end of the pore section 1-3 is connected with the front end of the rough hole section 1-5, the cross-sectional area of the constraint hole section 1-2 is larger than or equal to the cross-sectional area of the pore section 1-3, and the cross-sectional area of the pore section 1-3 is smaller than the cross-sectional area of the rough hole section 1-5; the junction between the fine pore section 1-3 and the coarse pore section 1-5 forms a step surface 1-4;
as shown in fig. 4, when the jaw frame 2 is in the operation position, the rear end of the jaw frame 2 is connected with the fine hole section 1-3, and the limit projection 2-1 and the connecting shaft 4 are connected with the rough hole section 1-5;
the restriction hole section 1-2 is used for abutting the clamping arm 3 so as to prevent the clamping arm 3 from rotating along the opening direction; by the design of the restriction orifice section 1-2, the clamping arm 3 can be adapted to clamp tissues of different sizes.
In some embodiments, as shown in FIG. 11, the bore further includes a pilot bore segment 1-1;
the rear end of the guide hole section 1-1 is coaxially connected with the front end of the constraint hole section 1-2, the guide hole section 1-1 and the constraint hole section 1-2 are both tapered, the taper of the guide hole section 1-1 is larger than that of the constraint hole section 1-2, and the clamping arm 3 for clamping larger tissues can be smoothly guided into the constraint hole section 1-2 through the guiding function of the guide hole section 1-1.
In some embodiments, as shown in fig. 10, further comprising an intermediate arm 5;
the middle arm 5 is arranged on the clamp head frame 2, and the middle arm 5 is positioned between the front ends of the two clamp arms 3;
the front end part of the clamping arm 3 is provided with a head part 3-1 which is bent inwards, the clamping arm 3 rotates in the closing direction until the head part 3-1 is aligned with the front end part of the middle arm 5, the rear end part of the head part 3-1 is positioned at the front side of the front end part of the middle arm 5, and a gap 6 is formed between the rear end part of the head part 3-1 and the front end part of the middle arm 5; in this way, the clip arm 3 can press the tissue between the head 3-1 and the distal end of the intermediate arm 5 when clipping the tissue, thereby improving the clipping effect.
The transmission mechanism in the invention can adopt but is not limited to the following three types:
as shown in fig. 12 and 13, the first transmission mechanism is: the device comprises two driving wires 7, two operation wires 8 and clamping arms 3, wherein each operation wire 8 is in one-to-one correspondence, each operation wire 8 is connected to a corresponding clamping arm 3 through one driving wire 7, one end of each driving wire 7 is fixedly connected with each operation wire 8, and the other end of each driving wire 7 is fixedly connected with each clamping arm 3;
the transmission line 7 is set to be automatically disconnected when the tensile force received exceeds a preset value; the driving wire 7 may be formed by a single steel wire or by winding two or more steel wires, and further, a groove may be provided on the driving wire 7, so that the driving wire 7 can be easily disconnected from the groove after the jaw frame 2 reaches the release position, thereby releasing the driving relationship between the operation wire 8 and the clamping arm 3.
The front end of the clamp head frame 2 extends forwards to form two side ears 2-2, two clamping arms 3 are positioned between the two side ears 2-2, the clamping arms 3 can be hinged with the side ears 2-2 of the clamp head frame 2 through pin shafts, the two clamping arms 3 can share one pin shaft, the middle arm 5 can be fixed on the pin shaft, and the pin shaft can be fixedly connected with the side ears 2-2.
When in use, the operating wire 8 can drive the driving wire 7 to move back and forth, and the driving wire 7 pushes and pulls the clamping arm 3, thereby realizing the opening or closing of the clamping arm 3.
As shown in fig. 14-16, the second transmission mechanism is: the transmission mechanism comprises two pull rods 9 with detachable structures, the operation wires 8 are two and are fixedly connected with one pull rod 9 respectively, and the pull rods 9 are in one-to-one correspondence with the clamping arms 3;
a connecting rod 11 is arranged between each pull rod 9 and a corresponding clamping arm 3, one end of the connecting rod 11 is hinged with the pull rod 9, and the other end is hinged with the clamping arm 3.
The disengageable structure is used for breaking the pull rod 9 when the pulling force to which the pull rod 9 is subjected exceeds a predetermined value; the disengageable structure may be, but is not limited to, a notch 9-1 provided at the front end of the pull rod 9, the notch 9-1 preferably being located at the hinge between the link 11 and the pull rod 9 so that the pull rod 9 can be easily broken from the notch 9-1 after the clamp head frame 2 reaches the release position.
The front end of the clamp head frame 2 extends forwards to form two side ears 2-2, two clamping arms 3 are positioned between the two side ears 2-2, the clamping arms 3 can be hinged with the side ears 2-2 of the clamp head frame 2 through pin shafts, the two clamping arms 3 can share one pin shaft, the middle arm 5 can be fixed on the pin shaft, and the pin shaft can be fixedly connected with the side ears 2-2.
When in use, the operating wire 8 drives the pull rod 9 to move forwards and backwards, and the connecting rod 11 pushes and pulls the clamping arm 3, so that the clamping arm 3 is opened or closed.
As shown in fig. 17-19, the third transmission mechanism is: the transmission mechanism comprises two transmission lines 7, two operation lines 8 are arranged and correspond to the clamping arms 3 one by one, and each operation line 8 is connected to a corresponding clamping arm 3 through one transmission line 7;
the transmission line 7 is set to be automatically disconnected when the tensile force received exceeds a preset value; the driving wire 7 can be formed by a single steel wire or two or more steel wires which are wound, and further, a groove can be arranged on the driving wire 7, so that the driving wire 7 can be easily disconnected from the groove after the jaw frame 2 reaches the release position, and the driving relation between the operation wire 8 and the clamping arm 3 is further relieved
The clamp head frame 2 is fixedly provided with a mounting plate 2-3, the mounting plate 2-3 is positioned between the two clamping arms 3, and the clamping arms 3 can be hinged with the mounting plate 2-3 of the clamp head frame 2 through a pin shaft respectively;
one side of the rear end of the clamping arm 3 in the left-right direction is hinged with the mounting plate 2-3, the other side is fixedly connected with the front end of the driving wire 7, the rear end of the driving wire 7 is connected with the operating wire 8, the joint between the driving wire 7 and the clamping arm 3 is marked as a first connecting point, and the hinging point between the clamping arm 3 and the mounting plate 2-3 is marked as a second connecting point; the layout has the advantages that the two clamping arms 3 can be hinged on the mounting plate 2-3 with uniform wall thickness, so that the offset distance between the first connecting point and the second connecting point can be enlarged in the radial direction of the sleeve 1, and the transmission line 7 can drive the clamping arms 3 to rotate more labor-saving;
in order to promote the compactness of the structure and to facilitate the installation, the intermediate arm 5 is integrally formed with or fixedly connected to the mounting plate 2-3.
When in use, the operating wire 8 can drive the driving wire 7 to move back and forth, and the driving wire 7 pushes and pulls the clamping arm 3, thereby realizing the opening or closing of the clamping arm 3.
In some embodiments, a hemostatic device for an endoscope includes the above-described clamping assembly.
Taking a clamping assembly using a first transmission mechanism as an example, how the clamping assembly and the hemostatic device for an endoscope in the above embodiment achieve functions is described as follows:
the operation component comprises an operation wire 8, and the operation wire 8 can be matched with the handle component for use;
the front end of the spring tube 10 is sleeved outside the rear end of the connecting shaft 4, the connecting shaft 4 is provided with a central through hole, the operation wire 8 or the transmission wire 7 passes through the central through hole, the connecting shaft 4 can move forwards and backwards along the spring tube 10, but the front end of the connecting shaft 4 is connected with the sleeve 1, specifically, the positioning piece 1-6 is embedded into the positioning groove 4-1 at the moment, the front end of the connecting shaft 4 moves forwards and is limited by the set stroke of the handle assembly, the positioning piece 1-6 is embedded into the positioning groove 4-1 and is limited by the backward movement, the front end of the spring tube 10 is provided with a limiting structure, the rear end of the sleeve 1 is abutted with the front end of the spring tube 10 so as to prevent the connecting shaft 4 from moving forwards and separating from the spring tube 10, wherein the sleeve 1 is generally thinner in wall thickness, the sleeve 1 can firmly abut against the front end of the spring tube 10 when the clamp head frame 2 moves backwards, the rear end of the sleeve 1 can be provided with a flange 1-7 for abutting against the front end of the spring tube 10, so that the sleeve 1 can be prevented from abutting the front end of the spring tube 10 through the flange 1-7 and abutting the front end of the spring tube 10, and the front end of the sleeve 1 is prevented from being in the process of abutting against the front end of the spring tube 10, and the front end of the sleeve 1 is prevented from being damaged;
the rear end of the spring tube 10 is connected with a handle assembly, the operation wire 8 passes through the spring tube 10, the handle assembly is provided with a handle and two sliding blocks which are slidably arranged on the handle, the two operation wires 8 are respectively fixed on the two sliding rings, so that when the sliding blocks are moved forwards and backwards, the operation wire 8 can be driven to move forwards and backwards, and medical staff can use the sliding rings to control;
when the pliers are initially controlled, the pliers head frame 2 is in an operation position, the positioning sheet 1-6 is embedded into the positioning groove 4-1 of the connecting shaft 4, and the pliers head frame 2 is axially positioned between the positioning sheet 1-6 and the step surface 1-4; as shown in fig. 5 and 6, by driving the operation wire 8 to move backward, the clamp arm 3 is driven backward by the driving wire 7, and the clamp arm 3 rotates in the closing direction until the front end thereof cooperates with the intermediate arm 5 to clamp human tissue; as shown in fig. 3 and 4, by driving the operation wire 8 to move forward, the clamp arm 3 is driven backward by the driving wire 7, and the clamp arm 3 rotates in the opening direction so as to facilitate re-clamping of human tissue;
as shown in fig. 7 and 8, after the two clamp arms 3 clamp human tissue, as the pulling force applied on the operation wire 8 is increased, the clamp head frame 2 drives the connecting shaft 4 to overcome the resistance of the positioning piece 1-6 and move backwards, the positioning piece 1-6 is firstly separated from the positioning groove 4-1 and then is lapped on the peripheral wall of the limiting boss 2-1, and finally the positioning piece 1-6 is self-adaptively abutted against the limiting surface 2-11 of the limiting boss 2-1 after passing over the limiting boss 2-1 so as to prevent the clamp head frame 2 from moving forwards, maintain the clamp arm 3 in a closed state, and the clamp arm 3 clamping the tissue is abutted against the constraint hole section 1-2 and cannot move backwards, so that the clamp head frame 2 can be locked in a release position, and at the moment, the sleeve 1 is sleeved outside the clamp arm 3 to prevent the clamp arm 3 from rotating along the opening direction; the front end of the sleeve 1 on the jaw frame 2 is also provided with a stop protrusion 2-21, and the stop protrusion 2-21 can play a role in safety, namely if the clamped tissue is small, the abutting force between the clamping arm 3 and the constraint hole section 1-2 is insufficient to resist the force of the operation wire 8 driving the jaw frame 2 to move backwards, so that the jaw frame 2 moves backwards, and at the moment, the stop protrusion 2-21 can abut against the guide hole section 1-1, the front end part of the sleeve 1 or the constraint hole section 1-2, so that the jaw frame 2 is prevented from sliding out of the sleeve 1 backwards; the stop projections 2-21 preferably taper outwardly from front to back so that the front end of the jaw frame 2 can be easily assembled forwardly through the sleeve 1.
As shown in fig. 9, after the clamp arm 3 for clamping the tissue is abutted against the restraint hole section 1-2, the pulling force applied to the operation 8 is again increased until the transmission line 7 is disconnected, and the transmission relationship between the operation line 8 and the clamp arm 3 is released, and the connecting shaft 4 and the spring tube 10 are separated from the sleeve 1.
As can be seen from the foregoing, the clamping assembly and the hemostatic device for endoscope using the same according to the present embodiment can utilize the positioning sheet 1-6 to be embedded into the positioning groove 4-1 of the connecting shaft 4, and combine with the design of the limiting protrusion 2-1 on the jaw frame 2, so that the jaw frame 2 can be axially positioned in the inner hole of the sleeve 1 with a certain binding force, and the positioning sheet 1-6 can not interfere the opening and closing of the clamping arm 3 before the clamping arm 3 is closed to clamp the human tissue, thereby improving the smoothness of operation and better grasping tissue closure;
on the other hand, after the locating piece 1-6 passes over the connecting shaft 4 and the limiting bulge 2-1, the locating piece automatically butts against the limiting surface of the limiting bulge 2-1, so that the clamping arm 3 is maintained in a closed state by the interference caused by the sleeve 1 on the opening of the clamping arm 3; that is, the positioning pieces 1 to 6 are capable of positioning the jaw frame 2 not only in the operation position but also in the release position, thereby simplifying the structure, reducing the failure rate, reducing the cost, and improving the success rate of the clamping. In the aspect of wound closure hemostasis of large wounds of the alimentary canal, the clinical application effect is excellent, compared with the traditional disposable hemostatic clamp, the hemostatic clamp can carry out closure hemostasis treatment on wounds of larger wounds, and compared with the designs of the three-arm clamp and the like in the prior art, the hemostatic clamp can ensure smooth operation and can not interfere the opening and closing of the clamp arms.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A clamping assembly, characterized in that: comprising the following steps:
the sleeve (1) is internally provided with an inner hole with a step surface (1-4), and a positioning sheet (1-6) which can elastically deform is arranged at the rear side of the step surface (1-4) in the inner hole;
the rear end of the clamp head frame (2) can be arranged in the inner hole in a back-and-forth moving way and is provided with a limiting bulge (2-1); at least two clamping arms (3) are hinged at the front end of the clamp head frame (2);
the front end of the connecting shaft (4) can be arranged in the inner hole in a back-and-forth movable way, and a positioning groove (4-1) is formed in the peripheral wall of the front end of the connecting shaft (4); the rear end of the connecting shaft (4) is connected with the front end of the spring tube (10), the rear end of the spring tube (10) is connected with the handle assembly, and the front end of the spring tube (10) is sleeved outside the rear end of the connecting shaft (4);
the transmission mechanism is used for converting the movement of the operation wire (8) into rotation for driving the clamping arm (3);
when the clamp head frame (2) is in an operation position, the positioning piece (1-6) is embedded into the positioning groove (4-1), so that the connecting shaft (4) axially positions the limiting boss (2-1) between the step surface (1-4) and the front end part of the connecting shaft (4); and at least a part of the clamping arm (3) is positioned outside the inner hole so as to allow the clamping arm (3) to rotate in the opening direction when the operation wire (8) moves forwards or in the closing direction when the operation wire (8) moves backwards;
when the clamp head frame (2) is in a release position, the two clamp arms (3) are closed to clamp human tissues, the clamp head frame (2) is driven by the operation wire (8) backwards to overcome the resistance of the positioning sheet (1-6) until the positioning sheet (1-6) abuts against the front end face of the limiting boss (2-1), and the inner hole is sleeved outside the clamp arms (3) to prevent the clamp arms (3) from rotating in the opening direction.
2. The clamp assembly of claim 1, wherein: when the clamp head frame (2) is in an operation position, the locating piece (1-6) is propped against the locating groove (4-1) forwards, and the front end face of the limiting protrusion (2-1) is propped against the step face (1-4).
3. The clamp assembly of claim 1, wherein: a part of the bottom end of the peripheral wall of the sleeve (1) is inwards bent to form a positioning sheet (1-6) capable of elastically deforming.
4. The clamp assembly of claim 1, wherein: the inner hole comprises a restraining hole section (1-2), a fine hole section (1-3) and a rough hole section (1-5) which are coaxially arranged;
the cross-sectional area of the constraint hole section (1-2) gradually becomes smaller from front to back, the front end of the pore section (1-3) is connected with the rear end of the constraint hole section (1-2), the rear end of the pore section (1-3) is connected with the front end of the rough hole section (1-5), the cross-sectional area of the constraint hole section (1-2) is more than or equal to the cross-sectional area of the pore section (1-3), and the cross-sectional area of the pore section (1-3) is less than the cross-sectional area of the rough hole section (1-5); the junction between the fine pore section (1-3) and the coarse pore section (1-5) forms a step surface (1-4);
when the clamp head frame (2) is in an operation position, the rear end of the clamp head frame (2) is connected with the fine hole section (1-3), and the limiting bulge (2-1) and the connecting shaft (4) are connected with the rough hole section (1-5);
the constraint hole section (1-2) is used for abutting the clamping arm (3) so as to prevent the clamping arm (3) from rotating along the opening direction.
5. The clamp assembly of claim 4, wherein: the inner hole also comprises a guide hole section (1-1);
the rear end of the guide hole section (1-1) is coaxially connected with the front end of the constraint hole section (1-2), the guide hole section (1-1) and the constraint hole section (1-2) are tapered, and the taper of the guide hole section (1-1) is greater than that of the constraint hole section (1-2).
6. The clamp assembly of claim 1, wherein: also comprises an intermediate arm (5);
the middle arm (5) is arranged on the jaw frame (2), and the middle arm (5) is positioned between the front ends of the two clamping arms (3);
the front end part of the clamping arm (3) is provided with a head part (3-1) which is bent inwards, the clamping arm (3) rotates in the closing direction until the head part (3-1) is aligned with the front end part of the middle arm (5), the rear end part of the head part (3-1) is positioned at the front side of the front end part of the middle arm (5), and a gap (6) is formed between the rear end part of the head part (3-1) and the front end part of the middle arm (5).
7. The clamp assembly of claim 1, wherein: the two clamping arms (3) are arranged, the transmission mechanism comprises two transmission lines (7), the two operation lines (8) are in one-to-one correspondence with the clamping arms (3), each operation line (8) is connected to the corresponding clamping arm (3) through one transmission line (7), one end of each transmission line (7) is fixedly connected with the corresponding operation line (8), and the other end of each transmission line is fixedly connected with the corresponding clamping arm (3);
the transmission line (7) is arranged to be automatically disconnected when the tensile force applied to the transmission line exceeds a preset value;
the front end of the clamp head frame (2) extends forwards to form two side lugs (2-2), two clamp arms (3) are located between the two side lugs (2-2), and the clamp arms (3) are hinged with the side lugs (2-2) of the clamp head frame (2).
8. The clamp assembly of claim 1, wherein: the transmission mechanism comprises two pull rods (9) with detachable structures, the two operation wires (8) are respectively and fixedly connected with one pull rod (9), and the pull rods (9) are in one-to-one correspondence with the clamping arms (3);
a connecting rod (11) is arranged between each pull rod (9) and a corresponding clamping arm (3), one end of the connecting rod (11) is hinged with the pull rod (9), and the other end is hinged with the clamping arm (3);
the detachable structure is used for enabling the pull rod (9) to be disconnected when the pulling force to which the pull rod (9) is pulled exceeds a preset value;
the front end of the clamp head frame (2) extends forwards to form two side lugs (2-2), two clamp arms (3) are located between the two side lugs (2-2), and the clamp arms (3) are hinged with the side lugs (2-2) of the clamp head frame (2).
9. The clamp assembly of claim 1, wherein: the transmission mechanism comprises two transmission lines (7), the operation lines (8) are two and correspond to the clamping arms (3) one by one, and each operation line (8) is connected to the corresponding clamping arm (3) through one transmission line (7);
the transmission line (7) is arranged to be automatically disconnected when the tensile force applied to the transmission line exceeds a preset value;
the clamp head frame (2) is fixedly provided with a mounting plate (2-3), the mounting plate (2-3) is positioned between the two clamp arms (3), and the clamp arms (3) are hinged with the mounting plate (2-3) of the clamp head frame (2);
one side of the rear end of the clamping arm (3) in the left-right direction is hinged with the mounting plate (2-3), the other side is fixedly connected with the front end of the transmission line (7), and the rear end of the transmission line (7) is connected with the operation line (8).
10. A hemostatic device for an endoscope, characterized in that: comprising a clamping assembly according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211239673.3A CN115444491B (en) | 2022-10-11 | 2022-10-11 | Clamping assembly and hemostatic device for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211239673.3A CN115444491B (en) | 2022-10-11 | 2022-10-11 | Clamping assembly and hemostatic device for endoscope |
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| Publication Number | Publication Date |
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| CN115444491A CN115444491A (en) | 2022-12-09 |
| CN115444491B true CN115444491B (en) | 2024-01-30 |
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| CN202211239673.3A Active CN115444491B (en) | 2022-10-11 | 2022-10-11 | Clamping assembly and hemostatic device for endoscope |
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|---|---|
| CN115444491A (en) | 2022-12-09 |
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