CN115444491A - Clip assembly and hemostatic device for endoscope - Google Patents
Clip assembly and hemostatic device for endoscope Download PDFInfo
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- CN115444491A CN115444491A CN202211239673.3A CN202211239673A CN115444491A CN 115444491 A CN115444491 A CN 115444491A CN 202211239673 A CN202211239673 A CN 202211239673A CN 115444491 A CN115444491 A CN 115444491A
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- 230000002439 hemostatic effect Effects 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 69
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000023597 hemostasis Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000452 restraining 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
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 206010016717 Fistula Diseases 0.000 description 1
- 208000032843 Hemorrhage Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003890 fistula Effects 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 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
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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 instruments, and provides a clamping assembly, and further relates to a hemostatic device for an endoscope, which comprises the clamping assembly, wherein the clamping assembly comprises a sleeve, a forceps head frame, a connecting shaft and a transmission mechanism, the rear end of the forceps head frame can be arranged in an inner hole of the sleeve in a forward and backward moving mode, and a positioning sheet is embedded into a positioning groove, so that a limiting bulge is axially positioned between a step surface and the front end part of the connecting shaft by the connecting shaft; at least one part of the clamping arm is positioned outside the inner hole so as to allow the clamping arm to rotate along the opening direction when the operating line moves forwards; when the forceps head frame is at the release position, the two clamping arms are closed to clamp human tissues, and the inner hole is sleeved outside the clamping arms to prevent the clamping arms from rotating along the opening direction.
Description
Technical Field
The invention relates to the technical field of medical instruments, provides a clamping assembly and further 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 clipping various hemorrhage, fistula, perforation and the like on the wall of the digestive tract tube, has the advantages of quick suture, simple and convenient operation, low side effect, less operation complication and the like, can effectively relieve the pain of patients and shortens the hospitalization time. Compared with a hemostatic clamp for an endoscope, the hemostatic clamp is particularly suitable for hemostasis and anastomosis of large wound surfaces, 3 to 5 hemostatic clamps can clamp the wound surfaces, and generally 1 hemostatic clamp can be used for clamping, so that the operation time of a patient can be greatly shortened, and the pain of the patient can be reduced.
Chinese patent publication No. CN111481304a discloses a three-arm clamp, which includes a clamping assembly and a release member connected to each other, the clamping assembly includes a fixed arm and two movable arms rotatably connected to the fixed arm through pin shafts, respectively, when a target is confirmed, the movable arms are driven to rotate, and the distal ends of the movable arms close toward the fixed arm to clamp the target; the near end of the movable arm is also provided with an elastic sheet, when the movable arm rotates along the pin shaft to be clamped and closed with the fixed arm, the elastic sheet is gradually folded in the inner cavity and is abutted against the release piece; finally, the elastic sheet is propped against the inner wall of the inner cavity through elasticity, so that the situation that the clamping component part in the body is kept after the operation is finished is effectively guaranteed.
According to the above description, the elastic sheet of the three-arm clamp is always abutted to the release piece, so that a certain friction force exists between the elastic sheet and the release piece, and the friction force can influence the movement of the release piece, so that the release piece is not smoothly operated when the movable arm needs to be opened and closed, and meanwhile, the elastic sheet of the movable arm and the release piece are also easily seriously abraded or blocked.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem that the operation is not smooth easily when the movable arm of the hemostatic device for the endoscope is opened and closed in the prior art, a clamping assembly and a hemostatic device for the endoscope comprising the clamping assembly are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a clip closure assembly comprising:
the inner part of the sleeve is provided with an inner hole with a step surface, and an elastically deformable positioning sheet is arranged at the rear side of the step surface in the inner hole;
the rear end of the forceps head frame can be arranged in the inner hole in a back-and-forth moving mode and is provided with a limiting bulge; the front end of the forceps head frame is hinged with two clamping arms;
the front end of the connecting shaft can be arranged in the inner hole in a forward and backward moving mode, and a positioning groove is formed in the peripheral wall of the front end of the connecting shaft;
the transmission mechanism is used for converting the movement of the operating line into the rotation of the driving clamping arm;
when the forceps head frame is positioned at the operation position, the positioning sheet is embedded into the positioning groove, so that the limiting bulge is axially positioned between the step surface and the front end part of the connecting shaft by the connecting shaft; and at least one part of the clamping arm is positioned outside the inner hole so as to allow the clamping arm to rotate along the opening direction when the operating line moves forwards or rotate along the closing direction when the operating line moves backwards;
when the forceps head frame is in the release position, the two clamping arms are closed to clamp human tissues, the forceps head frame is driven backwards by the operating wire to overcome the resistance of the positioning piece until the positioning piece abuts against the front end face of the limiting protrusion, and the inner hole is sleeved outside the clamping arms to prevent the clamping arms from rotating in the opening direction.
Further, when the forceps head frame is located at the operation position, the positioning piece is forwards abutted against the positioning groove, and the front end face of the limiting protrusion is abutted against the step face.
Furthermore, a part of the bottom end of the outer peripheral wall of the sleeve is bent inwards to form an elastically deformable positioning sheet.
Furthermore, the inner hole comprises a constraint hole section, a fine hole section and a coarse hole section which are coaxially arranged;
the cross section area of the restraining hole section is gradually reduced from front to back, the front end of the fine hole section is connected with the rear end of the restraining hole section, the rear end of the fine hole section is connected with the front end of the coarse hole section, the cross section area of the restraining hole section is larger than or equal to the cross section area of the fine hole section, and the cross section area of the fine hole section is smaller than the cross section area of the coarse hole section; a step surface is formed at the connecting part between the fine hole section and the coarse hole section;
when the forceps head frame is in the operation position, the rear end of the forceps 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 restriction hole section is used for supplying the arm lock butt to prevent the arm lock and rotate along opening the direction.
Further, the inner hole further comprises a guide hole 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 both conical, and the conical degree of the guide hole section is larger than that of the constraint hole section.
Further, the device also comprises a middle arm;
the middle arm is arranged on the forceps head frame and is positioned between the front ends of the two clamping arms;
the front end of the clamping arm is provided with a head which is bent inwards, the clamping arm rotates along the closing direction until the head is aligned with the front end of the middle arm, the rear end of the head is positioned on the front side of the front end of the middle arm, and a gap is formed between the rear end of the head and the front end of the middle arm.
Furthermore, the number of the clamping arms is two, the transmission mechanism comprises two transmission lines, the two operation lines correspond to the clamping arms one to one, each operation line is connected to one corresponding clamping arm through one transmission line, one end of each transmission line is fixedly connected with the corresponding 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 received pulling force exceeds a preset value;
the front end of the forceps head frame extends forwards to form two side lugs, the two clamping arms are located between the two side lugs, and the clamping arms are hinged to the side lugs of the forceps head frame.
Furthermore, the transmission mechanism comprises two pull rods with detachable structures, the two operating lines are respectively and fixedly connected with one pull rod, and the pull rods correspond to the clamping arms one by one;
and a connecting rod is arranged between each pull rod and one corresponding clamping arm, one end of each connecting rod is hinged with the pull rod, and the other end of each connecting rod is hinged with the corresponding clamping arm.
The detachable structure is used for disconnecting the pull rod when the pulling force of the pull rod exceeds a preset value;
the front end of the forceps head frame extends forwards to form two side lugs, the two clamping arms are located between the two side lugs, and the clamping arms are hinged to the side lugs of the forceps head frame.
Furthermore, the transmission mechanism comprises two transmission lines, the two operation lines are provided and correspond to the clamping arms one by one, and each operation line is connected to one corresponding clamping arm through one transmission line;
the transmission line is set to be automatically disconnected when the received pulling force exceeds a preset value;
the clamp head frame is fixedly provided with an installation plate, the installation plate is positioned between the two clamping arms, and the clamping arms are hinged with the installation 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 operating line.
The invention also provides a hemostatic device for the endoscope, which comprises the clamping and closing assembly.
The beneficial effects of the invention are:
on one hand, the positioning sheet is embedded into the positioning groove of the connecting shaft, and the design of the limiting bulge on the forceps head frame is combined, so that the forceps head frame can be axially positioned in the inner hole of the sleeve with a certain binding force, and the positioning sheet can not interfere with the opening and closing of the clamping arm before the clamping arm finishes closing and clamping human tissues, thereby improving the smoothness of operation and better grasping tissue closing;
on the other hand, after the positioning sheet passes over the connecting shaft and the limiting bulge, the positioning sheet automatically props against the limiting surface of the limiting bulge, so that the clamping arm is maintained in a closed state by means of interference caused by the opening of the sleeve on the clamping arm; that is to say, the spacer not only can be with binding clip frame location in the operating position, can also be with binding clip frame control in the release position to simplify the structure, reduce the fault rate, reduce the cost and improve and press from both sides and close the success rate height.
Further features of the invention and advantages thereof are in particular described in the following detailed description of exemplary embodiments.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
FIG. 1 is a three-dimensional schematic view of a clamping assembly employing a first type of actuator;
FIG. 2 is a schematic front view of a pinch closure assembly using a first actuator;
FIG. 3 is a schematic view of the clamping assembly employing the first type of actuator with the sleeve, connecting shaft and spring tube broken away when the jawshead frame is in the operative position;
FIG. 4 is an enlarged partial view of A in FIG. 3;
FIG. 5 is a schematic view of the clamping assembly with the two clamping arms opened, using a first transmission mechanism;
FIG. 6 is an enlarged partial schematic view of B in FIG. 5;
FIG. 7 is a schematic view of the clamping assembly employing the first type of actuator with the sleeve, link shaft, jaw frame and spring tube broken away when the jaw frame is in the release position;
FIG. 8 is a partial enlarged 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 view of the engagement of the intermediate wall with the two clamp arms;
FIG. 11 is a schematic view of a sleeve;
FIG. 12 is a schematic view of a first transmission;
FIG. 13 is a three-dimensional schematic view of a jaw assembly employing a first actuator having its jaws mounted on a jaw frame;
FIG. 14 is a cross-sectional view of the sleeve, link shaft, jaw frame and spring tube of the clamping assembly with the second drive mechanism in the operative position of the jaw frame;
FIG. 15 is a three-dimensional schematic view of a jaw assembly employing a second actuator mechanism with the clamping arms mounted on the jawarm;
FIG. 16 is a schematic view of a second intermediate transmission;
FIG. 17 is a front view of the clamping assembly employing the third actuator with the two clamping arms open;
FIG. 18 is a front view of the clip closing assembly employing the third actuator with the two clip arms closed;
figure 19 is a three-dimensional schematic view of a jaw assembly employing a third actuator having its jaws mounted on a jawarm.
In the figure: 1. 1-1 parts of a sleeve, 1-2 parts of a guide hole section, 1-2 parts of a constraint hole section, 1-3 parts of a fine hole section, 1-4 parts of a step surface, 1-5 parts of a coarse hole section, 1-6 parts of a positioning sheet, 1-7 parts of a flange;
2. 2-1 parts of a forceps head frame, 2-11 parts of a limiting bulge, 2-2 parts of a limiting surface, 2-21 parts of a side lug, 2-3 parts of a stop bulge and a mounting plate;
3. a clamping arm 3-1 and 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 line;
9. a pull rod 9-1 and a notch;
10. a spring tube;
11. a connecting rod.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The figures are simplified schematic diagrams that illustrate the basic structure of the invention in a schematic manner only, and thus show only the components that are relevant to the invention, and directions and references (e.g., up, down, left, right, etc.) may be used only to help describe the features in the figures. 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 forceps head frame 2, a connecting shaft 4 and a transmission mechanism;
as shown in fig. 11, the sleeve 1 is internally penetrated in a stepped manner, that is, the sleeve 1 is provided with an inner hole with step surfaces 1-4, and an elastically deformable positioning piece 1-6 is arranged at the rear side of the step surfaces 1-4 in the inner hole;
as shown in fig. 3 and 4, the rear end of the forceps head frame 2 is disposed in the inner hole in a manner of moving back and forth, for example, the rear end of the forceps head frame 2 can be slidably connected with the inner hole in a back and forth direction, the cross section of the inner hole can be circular, and correspondingly, the cross section of the part where the forceps head frame 2 is slidably connected with the inner hole is also circular; the rear end of the forceps head frame 2 is provided with a limiting bulge 2-1, and the front end face of the limiting bulge 2-1 is provided with a limiting surface 2-11 which is used for being connected with a step surface 1-4 or a positioning sheet 1-6; as shown in fig. 4, the rear end of the limiting projection 2-1 may have a tapered surface with a larger front end and a smaller rear end, and the tapered surface is used to guide the spacer 1-6 to the limiting surface 2-11 relatively easily during the backward movement of the limiting projection 2-1, compared to when no tapered surface is provided, i.e. the rear end of the limiting projection 2-1 is still shaped as a straight prism; the front end of the forceps head frame 2 is hinged with two clamping arms 3, and the clamping arms 3 are used for clamping and closing tissues so as to close a large wound;
the front end of the connecting shaft 4 is arranged in the inner hole in a back-and-forth moving mode, 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 operation assembly, so that the situation that the clamp head frame 2 and the clamp arm 3 cannot be released due to the fact that the connecting shaft 4 is not blocked by the front end of the operation assembly in the process of moving backwards occurs;
the transmission mechanism is used for converting the movement of the operating line 8 into the rotation for driving the clamping arm 3, and the operating line 8 can be a steel wire, but not limited to the steel wire, and can also adopt the operating line 8 in the prior art;
as shown in fig. 2-6, when the forceps head frame 2 is at the initial operation position (the clamping arm 3 is not yet clamped or released), the positioning piece 1-6 is embedded into the positioning groove 4-1 at this time, so that the connecting shaft 4 relatively connects the forceps head frame 2 and the operation assembly, the limiting protrusion 2-1 is axially positioned between the step surface 1-4 and the front end of the connecting shaft 4 at this time, and the positioning groove 4-1 may be specifically an annular groove and surrounds the outer peripheral wall of the connecting shaft 4, so that the positioning piece 1-6 and the positioning groove 4-1 can be conveniently installed in a matching manner, and in the process that the forceps head frame 2 and the clamping arm 3 are retracted to the sleeve 1 until being released, alignment assembly does not need to be considered, and the operation is simplified; at least one part of the clamping arm 3 is positioned outside the inner hole so as to allow the clamping arm 3 to rotate along the opening direction when the operating wire 8 moves forwards, and tissues can be accommodated at the moment; or when the operating wire 8 moves backwards, it rotates in the closing direction, at this time, the tissue is clamped and ready for separation;
as shown in figures 7-8, when the forceps head frame 2 is in the operable release position, the two clamping arms 3 are closed to clamp human tissue, the forceps head frame 2 is driven backwards by the operating wire 8 to overcome the resistance of the positioning pieces 1-6 until the positioning pieces 1-6 abut against the front end face of the limiting protrusion 2-1, and the inner hole is sleeved outside the clamping arms 3 to prevent the clamping arms 3 from rotating in the opening direction.
It should be noted that the rotation of the clip arm 3 in the closing direction and the rotation in the opening direction in the present embodiment are defined as follows: the pin joint between arm lock 3 and binding clip frame 2 is first pin joint, and the position that lies in first pin joint front side on arm lock 3 is the front end of arm lock 3, and the position that lies in first pin joint rear side on arm lock 3 is the rear end of arm lock 3, and arbitrary arm lock 3 rotates along closed direction and can show that the interval between two arm lock 3 front ends diminishes gradually, and arbitrary arm lock 3 rotates along opening the direction and can show that the interval between two arm lock 3 front ends enlarges gradually.
When the clamping assembly is used:
in an initial state, as shown in fig. 2-4, the positioning piece 1-6 is embedded into the positioning groove 4-1 of the connecting shaft 4, the forceps head frame 2 is located at an operating position, as shown in fig. 5 and 6, when the operating wire 8 is pulled to move backwards, the clamping arm 3 rotates along a closing direction until human tissues are clamped; if the tissue needs to be clamped again, the operating wire 8 can be pushed to move forwards, and the clamping arm 3 can rotate along the opening and closing direction to realize the opening again;
as shown in fig. 7 and 8, in a state that the clamping arms 3 are closed to clamp human tissue, once the human tissue is clamped, the clamping arms 3 cannot rotate continuously in the closing direction, and as the pulling force applied to the operating wire 8 to move the forceps head frame 2 backward is increased, the forceps head frame 2 drives the connecting shaft 4 to move backward against the resistance of the positioning pieces 1 to 6 until the forceps head frame 2 moves backward until the limiting protrusions 2-1 pass the positioning pieces 1 to 6, and the positioning pieces 1 to 6 abut against the limiting surfaces 2 to 11 of the limiting protrusions 2 to 1 to prevent the forceps head frame 2 from moving forward, so as to maintain the clamping arms 3 in the closed state, and at this time, the sleeve 1 is sleeved outside the clamping arms 3 to prevent the clamping arms 3 from rotating in the opening direction.
According to the clamping and closing assembly, on one hand, the positioning pieces 1-6 are embedded into the positioning grooves 4-1 of the connecting shaft 4, and the design of the limiting protrusions 2-1 on the forceps head frame 2 is combined, so that the forceps head frame 2 can be axially positioned in the inner hole of the sleeve 1 with a certain binding force, and the positioning pieces 1-6 can not interfere with the opening and closing of the clamping arms 3 before the clamping arms 3 finish closing and clamping human tissues, so that the smoothness of operation is improved, and the tissues can be better clamped and closed; on the other hand, after the positioning pieces 1-6 pass over the connecting shaft 4 and the limiting bulges 2-1, the positioning pieces automatically abut against the limiting surfaces 2-11 of the limiting bulges 2-1, so that the clamping arms 3 are maintained in a closed state by means of interference caused by the sleeve 1 to the opening of the clamping arms 3; that is, the positioning pieces 1 to 6 can not only position the forceps head holder 2 at the operation position, but also control the forceps head holder 2 at the release position, thereby simplifying the structure, reducing the failure rate, reducing the cost, and improving the success rate of clamping.
To better understand the clamping assembly of this embodiment, it is further explained and illustrated below;
in some embodiments, as shown in fig. 4, when the forceps head frame 2 is in the operating position, the positioning plate 1-6 is pressed forwards against the positioning groove 4-1, and the front end surface of the limiting protrusion 2-1 is abutted against the step surface 1-4; thereby achieving axial positioning of the jaw head 2 within the sleeve 1.
In some embodiments, as shown in fig. 4 and 8, a portion of the bottom end of the outer peripheral wall of the sleeve 1 is bent inward to form elastically deformable positioning tabs 1-6; therefore, after the positioning pieces 1-6 pass over the connecting shaft 4 and the limiting protrusions 2-1, the forceps head frame 2 can be allowed to have certain axial displacement deviation, and within the range of the axial displacement deviation, the positioning pieces 1-6 can automatically abut against the limiting surfaces 2-11 of the limiting protrusions 2-1, so that the clamping arms 3 can be stably and firmly maintained in a closed state after clamping tissues with different sizes, and the clamping arms 3 are prevented from loosening;
specifically, as shown in fig. 4, in order to facilitate bending to form the positioning piece 1-6, a window is formed in the bottom end of the outer circumferential wall of the sleeve 1, a part of the outer circumferential wall of the sleeve 1, where the window is located, is bent inward to form the positioning piece 1-6 capable of elastically deforming, one end of the positioning piece 1-6 is connected with the inner wall of the front side of the window, and the positioning piece 1-6 can be inclined inward gradually from front to back, so that the positioning piece is beneficial to passing over the positioning groove 4-1 and stably abutting against the front section end face of the limiting protrusion 2-1; as for the number of the positioning pieces 1-6, the number can be determined according to the actual situation, for example, the positioning pieces 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 bore segments 1-2, fine bore segments 1-3, and coarse bore segments 1-5, the cross-sections of constraining bore segments 1-2, fine bore segments 1-3, and coarse bore segments 1-5 are preferably circular;
the cross section area of the constraint hole section 1-2 is gradually reduced from front to back, the front end of the fine hole section 1-3 is connected with the back end of the constraint hole section 1-2, the back end of the fine hole section 1-3 is connected with the front end of the coarse hole section 1-5, the cross section area of the constraint hole section 1-2 is larger than or equal to that of the fine hole section 1-3, and the cross section area of the fine hole section 1-3 is smaller than that of the coarse hole section 1-5; a step surface 1-4 is formed at the connecting part between the fine hole section 1-3 and the coarse hole section 1-5;
as shown in fig. 4, when the forceps head frame 2 is in the operating position, the rear end of the forceps head frame 2 is connected with the fine hole section 1-3, and the limiting bulge 2-1 and the connecting shaft 4 are both connected with the coarse hole section 1-5;
the restriction hole section 1-2 is used for the clamping arm 3 to abut against so as to prevent the clamping arm 3 from rotating along the opening direction; through the design of the constraint hole sections 1-2, the clamping arms 3 can adapt to clamping tissues with different sizes.
In some embodiments, as shown in FIG. 11, the inner bore further comprises 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 restraint hole section 1-2, the guide hole section 1-1 and the restraint hole section 1-2 are conical, the conical degree of the guide hole section 1-1 is larger than that of the restraint hole section 1-2, and the clamping arm 3 for clamping larger tissues can be smoothly guided into the restraint hole section 1-2 through the guiding effect of the guide hole section 1-1.
In some embodiments, as shown in fig. 10, further comprises an intermediate arm 5;
the middle arm 5 is arranged on the forceps head 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 along 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 on 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; therefore, when clamping the tissues, the clamping arms 3 can press the tissues into the space between the head 3-1 and the front end part of the middle arm 5, and the clamping effect is improved.
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 clamp comprises two transmission lines 7, two operation lines 8 are arranged and correspond to the clamp arms 3 one by one, each operation line 8 is connected to one corresponding clamp 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 7 is fixedly connected with the corresponding clamp arm 3;
the transmission line 7 is set to be automatically disconnected when the received tension exceeds a preset value; the transmission line 7 can be formed by a single steel wire or by winding two or more steel wires, and furthermore, a groove can be formed in the transmission line 7, so that the transmission line 7 can be easily disconnected from the groove after the forceps head holder 2 reaches the release position, and the transmission relation between the operation line 8 and the forceps arm 3 is further released.
The front end of the forceps head frame 2 extends forwards to form two side lugs 2-2, two clamping arms 3 are located between the two side lugs 2-2, the clamping arms 3 can be hinged with the side lugs 2-2 of the forceps 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 lugs 2-2.
When the clamping arm is used, the operating wire 8 drives the transmission wire 7 to move back and forth, and the transmission wire 7 pushes and pulls the clamping arm 3, so that the clamping arm 3 is opened or closed.
As shown in fig. 14-16, the second transmission mechanism is: the transmission mechanism comprises two pull rods 9 with detachable structures, the operating lines 8 are provided with two and are respectively fixedly connected with one pull rod 9, and the pull rods 9 correspond to the clamping arms 3 one by one;
a connecting rod 11 is arranged between each pull rod 9 and one corresponding clamping arm 3, one end of each connecting rod 11 is hinged with the pull rod 9, and the other end of each connecting rod 11 is hinged with the corresponding clamping arm 3.
The detachable structure is used for disconnecting the pull rod 9 when the pulling force of the pull rod 9 exceeds a preset value; the disengageable structure can be, but is not limited to, a notch 9-1 provided at the front end of the pull rod 9, and the notch 9-1 is preferably located at the hinge joint between the connecting rod 11 and the pull rod 9, so that the pull rod 9 can be easily disconnected from the notch 9-1 after the jaw frame 2 reaches the release position.
The front end of the forceps head frame 2 extends forwards to form two side lugs 2-2, two clamping arms 3 are located between the two side lugs 2-2, the clamping arms 3 can be hinged with the side lugs 2-2 of the forceps 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 lugs 2-2.
When the clamping arm is used, the operating wire 8 drives the pull rod 9 to move back and forth, 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, the two operation lines 8 correspond to the clamping arms 3 one by one, and each operation line 8 is connected to one corresponding clamping arm 3 through one transmission line 7;
the transmission line 7 is set to be automatically disconnected when the received tension exceeds a preset value; the transmission line 7 can be formed by a single steel wire or by winding two or more steel wires, and further, a groove can be formed in the transmission line 7, so that the transmission line 7 can be easily disconnected from the groove after the forceps head frame 2 reaches the release position, and the transmission relation between the operation line 8 and the clamping arm 3 is released
The clamp head frame 2 is fixed with a mounting plate 2-3, the mounting plate 2-3 is positioned between the two clamp arms 3, and the clamp arms 3 can be respectively hinged with the mounting plate 2-3 of the clamp head frame 2 through a pin shaft;
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 of the rear end of the clamping arm 3 is fixedly connected with the front end of the transmission line 7, the rear end of the transmission line 7 is connected with the operating line 8, the joint between the transmission line 7 and the clamping arm 3 is marked as a first connecting point, and the hinge 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 jointly 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 in a more labor-saving manner;
to increase the compactness of the structure and to facilitate the mounting, the intermediate arm 5 is integrally formed with or fixedly connected to the mounting plate 2-3.
When the clamping arm is used, the operating wire 8 drives the transmission wire 7 to move back and forth, and the transmission wire 7 pushes and pulls the clamping arm 3, so that the clamping arm 3 is opened or closed.
In some embodiments, a hemostatic device for an endoscope includes the above-described clipping assembly.
Taking the clipping assembly using the first transmission mechanism as an example, how the clipping assembly and the hemostatic device for endoscope in the above embodiment achieve the functions will be described as follows:
the operation assembly comprises an operation wire 8, and the operation wire 8 can be matched with the handle assembly 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, an operating wire 8 or a transmission wire 7 penetrates through the central through hole, the connecting shaft 4 can move back and forth along the spring tube 10, but the front end of the connecting shaft 4 is connected with the sleeve 1, specifically, the positioning sheets 1-6 are embedded into the positioning grooves 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 sheets 1-6 are embedded into the positioning grooves 4-1 and are limited, the front end of the spring tube 10 is provided with a limiting structure, the rear end of the sleeve 1 is abutted against the front end of the spring tube 10 to prevent the connecting shaft 4 from moving forwards and being separated from the spring tube 10, wherein the sleeve 1 is generally thin in wall thickness, in order to enable the tong head frame 2 to move backwards, the sleeve 1 can firmly abut against the front end of the spring tube 10, the rear end of the sleeve 1 can be provided with flanges 1-7 for abutting against the front end of the spring tube 10, and the flange 1 can be prevented from being damaged in the use process of the sleeve 1, and the front end of the spring tube 10 is prevented from being punctured;
the rear end of the spring tube 10 is connected with the handle assembly, the operating wire 8 penetrates through the spring tube 10, the handle assembly is provided with a handle and two sliding blocks which are slidably installed on the handle, and the two operating wires 8 are respectively fixed on the two sliding rings, so that when the sliding blocks are moved back and forth, the operating wire 8 can be driven to move back and forth, and medical staff can use the sliding rings to operate and control;
during initial operation, the tong head frame 2 is in an operation position, the positioning piece 1-6 is embedded into the positioning groove 4-1 of the connecting shaft 4, and the tong head frame 2 is axially positioned between the positioning piece 1-6 and the step surface 1-4; as shown in fig. 5 and 6, the driving wire 8 is driven to move backwards, the driving wire 7 drives the clamping arm 3 backwards, and the clamping arm 3 rotates in the closing direction until the front end of the clamping arm 3 is matched with the middle arm 5 to clamp the human tissue; as shown in fig. 3 and 4, the operating wire 8 is driven to move forwards, the transmission wire 7 drives the clamping arm 3 backwards, and the clamping arm 3 rotates along the opening direction so as to clamp and close the human tissue again;
as shown in fig. 7 and 8, after the two clamping arms 3 clamp human tissues, as the pulling force applied to the operating line 8 is increased, the forceps head frame 2 drives the connecting shaft 4 to move backwards by overcoming the resistance of the positioning piece 1-6, the positioning piece 1-6 falls off from the positioning groove 4-1, and then is put on the outer peripheral wall of the limiting protrusion 2-1, and finally, after the positioning piece 1-6 passes over the limiting protrusion 2-1, the positioning piece 1-6 self-adaptively supports against the limiting surface 2-11 of the limiting protrusion 2-1 to prevent the forceps head frame 2 from moving forwards, so as to maintain the clamping arms 3 in a closed state, and the clamping arms 3 clamping the tissues can support against the constraining hole sections 1-2 and cannot move backwards, so that the forceps head frame 2 can be locked at a release position, and at the moment, the sleeve 1 is sleeved outside the clamping arms 3 to prevent the clamping arms 3 from rotating in an opening direction; the front end of the sleeve 1 on the forceps head frame 2 can be provided with a stop bulge 2-21, and the stop bulge 2-21 can play a safety role, namely if the clamped tissue is small, the abutting force between the clamping arm 3 and the constraint hole section 1-2 is not enough to resist the force of the operating line 8 driving the forceps head frame 2 to move backwards, so that the forceps head frame 2 moves backwards, and at the moment, the stop bulge 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 forceps head frame 2 is prevented from sliding backwards out of the sleeve 1; the stop projections 2-21 are preferably tapered outwardly from front to rear so as to facilitate the forward passage of the front end of the head 2 through the sleeve 1 when assembled.
As shown in fig. 9, after the clamping arm 3 clamping the tissue abuts against the restriction hole section 1-2, the pulling force applied to the operation 8 is increased again until the transmission line 7 is disconnected, and then the transmission relation between the operation line 8 and the clamping 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 and closing assembly and the endoscope hemostatic device using the same of the present embodiment can utilize the positioning piece 1-6 to be embedded into the positioning groove 4-1 of the connecting shaft 4, and in combination with the design of the limiting protrusion 2-1 on the forceps head frame 2, so that the forceps head frame 2 can be axially positioned in the inner hole of the sleeve 1 with a certain binding force, and it can be ensured that the positioning piece 1-6 does not interfere with the opening and closing of the forceps arm 3 before the forceps arm 3 completes the closing and clamping of the forceps head to clamp the human tissue, thereby improving the smoothness of the operation and better grasping the tissue closure;
on the other hand, after the positioning pieces 1-6 pass over the connecting shaft 4 and the limiting bulges 2-1, the positioning pieces automatically abut against the limiting surfaces of the limiting bulges 2-1, so that the clamping arms 3 are maintained in a closed state by means of interference caused by the sleeve 1 to the opening of the clamping arms 3; that is, the positioning pieces 1 to 6 can not only position the forceps head holder 2 at the operation position, but also control the forceps head holder 2 at the release position, thereby simplifying the structure, reducing the failure rate, reducing the cost, and improving the success rate of clamping. In the aspect of wound closure hemostasis of the big surface of a wound of alimentary canal, clinical application effect is splendid, compares traditional disposable hemostatic clamp, can carry out closure hemostasis to the wound of bigger surface of a wound and handle, and for designs such as three-arm clamp among the prior art, can guarantee the smooth and easy of operation again, can not form the interference to opening closure of arm lock.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A clip closure assembly, comprising: the method comprises the following steps:
the inner part of the sleeve (1) is provided with an inner hole of a step surface (1-4), and the rear side of the inner hole positioned on the step surface (1-4) is provided with an elastically deformable positioning sheet (1-6);
the back end of the forceps head frame (2) can be arranged in the inner hole in a back-and-forth moving mode and is provided with a limiting bulge (2-1); the front end of the forceps head frame (2) is hinged with at least two clamping arms (3);
the front end of the connecting shaft (4) can be arranged in the inner hole in a front-and-back moving mode, and a positioning groove (4-1) is formed in the outer peripheral wall of the front end of the connecting shaft (4);
the transmission mechanism is used for converting the movement of the operating line (8) into the rotation of the driving clamping arm (3);
when the forceps head frame (2) is located at an operation position, the positioning sheet (1-6) is embedded into the positioning groove (4-1), so that the limiting protrusion (2-1) is axially positioned between the step surface (1-4) and the front end of the connecting shaft (4) by 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 along the opening direction when the operating line (8) moves forwards or rotate along the closing direction when the operating line (8) moves backwards;
when the forceps head frame (2) is located at the release position, the two clamping arms (3) are closed to clamp human tissues, the forceps head frame (2) is driven backwards by the operating wire (8) to overcome the resistance of the positioning pieces (1-6) until the positioning pieces (1-6) abut against the front end face of the limiting protrusion (2-1), and the inner hole is sleeved outside the clamping arms (3) to prevent the clamping arms (3) from rotating in the opening direction.
2. A clip closure assembly as defined in claim 1, wherein: when the forceps head frame (2) is located at an operation position, the positioning piece (1-6) is forwards abutted against the positioning groove (4-1), and the front end face of the limiting bulge (2-1) is abutted against the step face (1-4).
3. A clip closure assembly as defined in claim 1, wherein: and a part of the bottom end of the outer peripheral wall of the sleeve (1) is bent inwards to form an elastically deformable positioning sheet (1-6).
4. A clip closure assembly as defined in claim 1, wherein: the inner hole comprises a constraint hole section (1-2), a fine hole section (1-3) and a coarse hole section (1-5) which are coaxially arranged;
the cross section area of the restraint hole section (1-2) is gradually reduced from front to back, the front end of the fine hole section (1-3) is connected with the back end of the restraint hole section (1-2), the back end of the fine hole section (1-3) is connected with the front end of the coarse hole section (1-5), the cross section area of the restraint hole section (1-2) is larger than or equal to that of the fine hole section (1-3), and the cross section area of the fine hole section (1-3) is smaller than that of the coarse hole section (1-5); a step surface (1-4) is formed at the connecting part between the fine hole section (1-3) and the coarse hole section (1-5);
when the forceps head frame (2) is located at an operation position, the rear end of the forceps 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 coarse hole section (1-5);
the restriction hole section (1-2) is used for enabling the clamping arm (3) to abut against, so that the clamping arm (3) is prevented from rotating along the opening direction.
5. A clip closure assembly as defined in 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 both conical, and the conical degree of the guide hole section (1-1) is larger than that of the constraint hole section (1-2).
6. A pinch closure assembly as claimed in claim 1, wherein: further comprising an intermediate arm (5);
the middle arm (5) is arranged on the forceps head 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 along 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 on 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. A clip closure assembly as defined in claim 1, wherein: the number of the clamping arms (3) is two, the transmission mechanism comprises two transmission lines (7), the two operation lines (8) correspond to the clamping arms (3) one by one, each operation line (8) is connected to one 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 (7) is fixedly connected with the corresponding clamping arm (3);
the transmission line (7) is arranged to be automatically disconnected when the applied tension exceeds a predetermined value;
the front end of the forceps head frame (2) extends forwards to form two side lugs (2-2), the two clamping arms (3) are located between the two side lugs (2-2), and the clamping arms (3) are hinged with the side lugs (2-2) of the forceps head frame (2).
8. A pinch closure assembly as claimed in claim 1, wherein: the transmission mechanism comprises two pull rods (9) with detachable structures, the operating lines (8) are provided with two and are respectively fixedly connected with one pull rod (9), and the pull rods (9) correspond to the clamping arms (3) one by one;
a connecting rod (11) is arranged between each pull rod (9) and one corresponding clamping arm (3), one end of each connecting rod (11) is hinged to the pull rod (9), and the other end of each connecting rod is hinged to the corresponding clamping arm (3).
The detachable structure is used for disconnecting the pull rod (9) when the pulling force of the pull rod (9) exceeds a preset value;
the front end of the forceps head frame (2) extends forwards to form two side lugs (2-2), the two clamping arms (3) are located between the two side lugs (2-2), and the clamping arms (3) are hinged with the side lugs (2-2) of the forceps head frame (2).
9. A clip closure assembly as defined in claim 1, wherein: the transmission mechanism comprises two transmission lines (7), the two operation lines (8) correspond to the clamping arms (3) one by one, and each operation line (8) is connected to one corresponding clamping arm (3) through one transmission line (7);
the transmission line (7) is arranged to be automatically disconnected when the applied tension exceeds a predetermined 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 clamping arms (3), and the clamping 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 of the rear end of the clamping arm 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 operating line (8).
10. A hemostatic device for an endoscope, comprising: comprising a clip closure assembly according to any one of claims 1 to 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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| CN115444491A true CN115444491A (en) | 2022-12-09 |
| CN115444491B CN115444491B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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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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|---|---|
| CN115444491B (en) | 2024-01-30 |
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