Ligator and ligature nail for operationTechnical Field
The invention relates to the field of medical instruments, in particular to a surgical ligator and a ligator nail, which are applied to ligating internal hemorrhoid tissues and partial small blood vessels and tubular tissues (such as cholecyst tubes) clinically.
Background
Common methods for hemorrhoid surgical treatment include hemorrhoidectomy, exoincision and anastomotic suprahemorrhoidal cut nailing (PPH), cryohemorrhoid therapy, elastic band ligation hemorrhoid therapy, and the like. In clinical treatment of internal hemorrhoids, a rubber ring ligation hemorrhoid treatment method is generally adopted, and is suitable for small hemorrhoids, and a special rubber ring is sleeved at the root of the hemorrhoids, so that the hemorrhoids can be necrotized and shed about 1 week. The whole process of the ligation treatment realizes automation, time saving, labor saving, practicability, simplicity, convenience and rapidness, and effectively controls two symptoms of hemorrhoids, namely bleeding and prolapse. The operation can be completed by one person, and the time consumption is short; the operation is basically painless, hospitalization is not needed, and the price is moderate; the pain is slight and complications are rare. The procedure is therefore widely used in surgery. After the elastic ring is placed in the ligation treatment, the hemorrhoid blocks can only be necrotized and shed after the patient returns home by himself or herself for about 1 week. However, before the hemorrhoid is removed, the elastic ring is likely to be removed, and the ligation performance is unreliable, so that the treatment cannot be achieved. Moreover, for internal hemorrhoidal tissues, severed small blood vessels, and tubular tissues, there is currently no instrument that facilitates the aspiration or pulling of tissue while ligating tissue. Therefore, it is an object of the present invention to design a surgical ligator which can facilitate the suction or pulling of a tissue and simultaneously perform a ligature operation continuously, and which has high ligature reliability, and a ligature nail which can be inserted into a tissue, by breaking the conventional thought of the prior art.
Disclosure of Invention
The invention provides a ligator and a ligature nail for operation, which solve the problem that the elastic ring ligation reliability is not high in the current treatment process of the elastic ring ligation hemorrhoid.
In order to achieve the above purpose, the technical scheme of the ligator for operation adopted by the invention is as follows: a ligator for operation, which comprises a shell, a hood, an outer tube, a nail supporting seat, a nail bin, a nail pushing sheet and a driving device; defining one end of the ligator close to the operator as the front end of the ligator, and the other end of the ligator close to the operator as the rear end of the ligator, wherein the rear end of the outer tube is positioned and connected with the front end of the shell, and the head cover is detachably fixed at the front end of the outer tube; the nail pushing seat and the nail bin are arranged in the hood, the nail pushing sheet is arranged in the outer tube, the driving device is arranged in the shell and is provided with a driving end, the rear end of the nail pushing sheet is connected with the driving end, and the driving device can drive the nail pushing sheet to move forwards and backwards along the axial direction of the outer tube;
the main body of the nail pushing seat is a plate body, a first nail pushing guide groove and a second nail pushing guide groove are respectively arranged on two sides of the width direction of the plate body of the nail pushing seat along the rear end of the nail pushing seat to the front end direction of the nail pushing seat, each of the first nail pushing guide groove and the second nail pushing guide groove is composed of a straight line section and an arc section, the straight line section of the first nail pushing guide groove is parallel to the straight line section of the second nail pushing guide groove along the length direction of the plate body of the nail pushing seat, and the arc sections of the first nail pushing guide groove and the arc section of the second nail pushing guide groove are both positioned at the front end of the nail pushing seat and are arranged in parallel in the thickness direction of the plate body of the nail pushing seat to form a spiral groove for forming a ligature nail; the front ends of the nail pushing pieces are inserted into the inserted sections of the first nail pushing guide grooves and the second nail pushing guide grooves and are in sliding connection with the nail pushing seat, a section, located between the spiral grooves and the inserted sections, of the first nail pushing guide grooves and the second nail pushing guide grooves is used as a nail dropping opening, and the nail bin is abutted against the nail dropping opening; a first operation port for accommodating tissue of an affected part is formed in the plate body of the nail supporting seat and is close to the spiral groove; the side part of the head cover is provided with a second operation opening corresponding to the first operation opening of the nail propping seat.
In order to achieve the above purpose, the technical scheme of the ligator for operation adopted by the invention is as follows: a ligator for operation, which comprises a shell, a hood, an outer tube, a nail supporting seat, a nail bin, a nail pushing sheet and a driving device; defining one end of the ligator close to the operator as the front end of the ligator, and the other end of the ligator close to the operator as the rear end of the ligator, wherein the rear end of the outer tube is positioned and connected with the front end of the shell, and the head cover is detachably fixed at the front end of the outer tube; the nail pushing seat and the nail bin are arranged in the hood, the nail pushing sheet is arranged in the outer tube, the driving device is arranged in the shell and is provided with a driving end, the rear end of the nail pushing sheet is connected with the driving end, and the driving device can drive the nail pushing sheet to move forwards and backwards along the axial direction of the outer tube;
the main body of the nail pushing seat is a plate body, a first nail pushing guide groove and a second nail pushing guide groove are respectively arranged on two sides of the width direction of the plate body of the nail pushing seat along the rear end of the nail pushing seat to the front end direction of the nail pushing seat, each of the first nail pushing guide groove and the second nail pushing guide groove is composed of a straight line section and an arc section, the straight line section of the first nail pushing guide groove is parallel to the straight line section of the second nail pushing guide groove along the length direction of the plate body of the nail pushing seat, and the arc sections of the first nail pushing guide groove and the arc section of the second nail pushing guide groove are both positioned at the front end of the nail pushing seat and are arranged in parallel in the thickness direction of the plate body of the nail pushing seat to form a spiral groove for forming a ligature nail; the front ends of the nail pushing pieces are inserted into the inserted sections of the first nail pushing guide grooves and the second nail pushing guide grooves and are in sliding connection with the nail pushing seat, a section, located between the spiral grooves and the inserted sections, of the first nail pushing guide grooves and the second nail pushing guide grooves is used as a nail dropping opening, and the nail bin is abutted against the nail dropping opening; a first operation opening for accommodating tissue of an affected part is formed in the plate body of the nail supporting seat, which is close to the spiral groove, and a first notch is formed in the end face of one side of the plate body of the nail supporting seat, which is close to the spiral groove, and is communicated with the first operation opening; the side part of the head cover is provided with a first operation opening and a second opening corresponding to the nail supporting seat, and the second operation opening and the second opening are communicated.
The content explanation in the first and second aspects is as follows:
1. in the above first technical scheme, only the first operation port is provided on the plate body of the nail supporting seat, and the second operation port is provided on the side portion of the hood corresponding to the first operation port, and the structural design is suitable for internal hemorrhoid tissues, and negative pressure suction can be performed on the internal hemorrhoid tissues at the first operation port and the second operation port through vacuum negative pressure.
In the second technical scheme, the plate body of the nail supporting seat is provided with a first operation opening and a first notch, and the side part of the head cover is provided with a second operation opening and a second notch with a cover corresponding to the first operation opening and the first notch respectively. The structure can be used for carrying out negative pressure suction on tissues to be ligated or carrying out traction on auxiliary instruments. That is, in the case of internal hemorrhoid, the internal hemorrhoid can be sucked under negative pressure by using only the first operation port and the second operation port on the premise of closing the cover on the second notch, and the cover on the second notch can be opened, so that the internal hemorrhoid can be pulled into the first operation port and the second operation port through the first notch and the second notch by using the auxiliary instrument. For small blood vessels or other tubular tissue (e.g., a cholecyst tube), the cap is opened over the second incision and the small blood vessel or other tubular tissue is pulled through the first and second incision into the first and second access ports with an auxiliary instrument.
2. In the two schemes, the head cover is a transparent cover body.
3. In the above two schemes, drive arrangement includes inner tube, push away pipe support, connecting rod and spanner, inner tube, push away pipe support and connecting rod setting are in the casing, the front end of inner tube and the rear end fixed connection of push away the nail piece, the inner tube in its axial relatively push away the pipe support location, the one end of connecting rod with push away the pipe support articulated, the other end of connecting rod with one point on the spanner tip articulates, another point on its tip with the casing articulates, corresponds the spanner arch on the casing and is equipped with the handle.
4. In the above two schemes, a negative pressure pipe for passing negative pressure is arranged in the shell, the front end of the negative pressure pipe is communicated with the rear end of the outer pipe or the inner pipe, and the rear end of the negative pressure pipe is arranged outside the shell in a penetrating way.
5. In both of the above-mentioned versions, reference is made to "forward", "rearward", "front end" and "rear end" with respect to the end of the entire hemorrhoid ligation cutter that is adjacent to the operator (i.e., the patient) at the time of the surgical procedure as the front and the end of the entire hemorrhoid ligation cutter that is adjacent to the operator (i.e., the surgeon) as the rear.
In order to achieve the above object, according to the first and second ligators for operation, the present invention adopts a technical scheme that: the ligature nail consists of a connecting part and two nail feet, wherein the two nail feet are respectively arranged on two end parts of the connecting part; the sum of the lengths of the two nail feet is larger than the length of the connecting part and smaller than twice the length of the connecting part, and the length of a single nail foot is smaller than the length of the connecting part; in the assembled state of the ligator, a plurality of ligating nails are arranged in the nail bin, and the ends of the nail feet of the ligating nails face to the spiral groove. The ligature nail is made of metal (such as stainless steel and titanium alloy) meeting the requirements of an implant, can have different surface shapes and cross-section states, and is safer and more reliable to ligature compared with the current elastic ring in clinic.
The working principle of the invention is as follows: aiming at the problems that the reliability of the elastic ring ligation hemorrhoids is not high and the patients are painful in the process of waiting for the elastic ring to fall off by themselves in the prior clinic, the invention provides a ligator for operation and a ligature nail matched with the ligator for use. First, according to the different hood structures of the above two technical schemes, namely, the hood of the first technical scheme is only provided with an operation opening at the side part, and the hood of the second technical scheme is provided with an operation opening and a notch with a cover at the side part, and by selecting different hoods, the ligator can conveniently draw and pull tissues to be ligatured and cut through vacuum negative pressure or draw tissues to be ligatured and cut through auxiliary instruments.
Second, after the tissue is sucked or pulled to the foremost end of the ligator, the next step is to ligate the tissue. The nail bin is positioned on the nail falling opening of the nail supporting seat, a plurality of ligature nails are arranged in the nail bin, a nail supporting spring is arranged in the nail bin, and on the premise that the ligature nails are arranged in the nail bin, one ligature nail is always supported on the nail falling opening, and the end parts of two nail feet of the ligature nails face to the spiral groove on the premise that the ligature nails are arranged in the nail bin; the straight line section of the first nail pushing guide groove and the second nail pushing guide groove is equivalent to the sliding guide groove of the nail pushing sheet, the circular arc sections of the first nail pushing guide groove and the second nail pushing guide groove are arranged in parallel in the thickness direction of the plate body of the nail pushing seat to form a spiral groove, the structural design of the spiral groove is ingenious, the straight line section is communicated with the circular arc sections, when the nail pushing sheet slides to push nails towards the front end of the nail pushing seat until the ligature nails are pushed to the spiral groove, the ligature nails are formed at the spiral groove, at the moment, the ligature nails are mutually held by the two legs and the connecting parts of the two legs, and the formed ligature nails firmly tie tissues. The rear end of the nail pushing sheet is connected with the driving end, the driving device can drive the nail pushing sheet to move forwards and backwards along the axial direction of the outer tube, and then the wrench is fired once again, so that ligation can be performed again, that is, the invention can ligate tissues continuously and repeatedly.
Compared with the prior art, the invention has the beneficial effects that:
(1) The front end structure of the nail supporting seat and the side opening structure of the hood can conveniently attract or pull tissues to the hemorrhoid ligation cutter;
(2) The structure of the ligature nail and the structure of the front end for forming the ligature nail, namely the spiral groove structure, are ingenious in design, can firmly tie tissues, and ensure the reliability of the ligature performance;
(3) After the tissue is ligated, the ligature nail is left on the tissue, and falls off along with the scab at the tissue cutting part to be discharged out of the body, so that the phenomenon of bleeding at the wound part is avoided after the ligature.
In a word, the ligator for operation of the invention has high ligature reliability on hemorrhoids and even other tubular tissues, can ligate continuously and repeatedly, has reliable treatment for patients, and has simple and labor-saving operation for doctors.
Drawings
FIG. 1 is a schematic view of the overall construction of the ligator of example 1 with a hood;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic view of the ligator of example 1 without a hood and outer tube;
FIG. 4 is an exploded view of the ligator of example 1;
FIG. 5 is a schematic diagram showing the assembly of the abutment, the cartridge and the pusher in the ligator of example 1;
FIG. 6 is a schematic view of a cutter blade in the ligator of example 1;
FIG. 7 is an assembly schematic diagram of the abutment, the cartridge, the pusher and the knife of the ligator of example 1;
FIG. 8 is an exploded view of the cutter blade, stop support, positive stop, stop spring and lever of the ligator of example 1;
FIG. 9 is a schematic view of a staple holder without a staple and without a first notch in the ligator of example 1;
FIG. 10 is a schematic view of a staple holder with a staple in the ligator of example 1;
FIG. 11 is a schematic view of a pin abutment with a first notch in the ligator of example 2;
FIG. 12 is a schematic view of a hood with a second notch in the ligator of example 2;
FIG. 13 is a schematic view showing the internal structure of a housing of the ligator of example 1;
FIG. 14 is a schematic view showing the structure of the ligation nail according to example 1 before ligation;
FIG. 15 is a schematic view showing the structure of the ligature nail of example 1 after ligation;
FIG. 16 is a schematic view of the ligation nail of example 1 ligated to internal hemorrhoidal tissue.
In the above figures: 1. a housing; 2. a head cover; 3. an outer tube; 4. a nail supporting seat; 5. a staple cartridge; 6. nail pushing sheets; 7. a first push pin guide slot; 8. a second push pin guide groove; 9. a spiral groove; 10. a nail falling opening; 11. a first operation port; 12. a second operation port; 13. an inner tube; 14. pushing the pipe rack; 15. a connecting rod; 16. a wrench; 17. a handle; 18. a negative pressure pipe; 19. a first notch; 20. a second notch; 21. ligature nails; 22. internal hemorrhoid tissue; 23. a connection part; 24. nailing feet; 25. a cutting blade; 26. a blade spring; 27. a limit stop; 28. a stop block supporting seat; 29. a stop spring; 30. a deflector rod; 31. a cutter head; 32. a limiting end face; 33. unlocking the hole; 34. an inclined plane; 35. blade guide slots; 36. a bump; 37. a first section of rod body; 38. a second section of rod body; 39. a yielding port; 40. and a negative pressure start-stop switch.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
example 1: ligator and ligature nail for operation
Referring to fig. 1-10 and 13-16, the surgical ligator can automatically cut after ligating tissues, and comprises a shell 1, a hood 2, an outer tube 3, a nail supporting seat 4, a nail bin 5, a nail pushing sheet 6, a cutting blade 25, a blade spring 26, a limit stop 27, a stop supporting seat 28, a stop spring 29, a deflector rod 30 and a driving device;
defining one end of the surgical ligator close to the operator (generally referred to as a patient requiring an operation) as a front end of the surgical ligator, and the other end of the surgical ligator close to the operator (generally referred to as a surgeon) as a rear end of the surgical ligator, the rear end of the outer tube 3 being positioned and connected to the front end of the housing 1, i.e., the outer tube 3 being positioned in its axial direction with respect to the front end of the housing 1, the outer tube 3 being rotatable about its center with respect to the front end of the housing 1, the head cover 2 being detachably fixed to the front end of the outer tube 3; the nail pushing seat 4 and the nail bin 5 are arranged in the hood 2, and the nail pushing sheet 6, the cutting blade 25, the blade spring 26, the limit stop 27, the stop block supporting seat 28, the stop block spring 29 and the deflector rod are all positioned in the outer tube 3; the driving device is arranged in the shell 1;
the main body of the nail pushing seat 4 is a plate body, a first nail pushing guide groove 7 and a second nail pushing guide groove 8 are respectively arranged on two sides of the plate body of the nail pushing seat 4 in the width direction along the direction from the rear end to the front end of the nail pushing seat 4, the first nail pushing guide groove 7 and the second nail pushing guide groove 8 are respectively composed of straight line sections and circular arc sections, the straight line sections of the first nail pushing guide groove 7 are parallel to the straight line sections of the second nail pushing guide groove 8 along the length direction of the plate body of the nail pushing seat 4, and the circular arc sections of the first nail pushing guide groove 7 and the circular arc sections of the second nail pushing guide groove 8 are both positioned at the front end of the nail pushing seat 4 and are arranged in parallel in the thickness direction of the plate body of the nail pushing seat 4 to form a spiral groove 9 for forming ligature nails; the front ends of the nail pushing pieces 6 are inserted into the inserted sections of the first nail pushing guide grooves 7 and the second nail pushing guide grooves 8 and are in sliding connection with the nail pushing seat 4, the sections of the first nail pushing guide grooves 7 and the second nail pushing guide grooves 8, which are positioned between the spiral grooves 9 and the inserted sections, are used as nail falling openings 10, and the nail bins 5 are abutted against the nail falling openings 10; a first operation opening 11 for accommodating tissue of an affected part is formed in the plate body of the nail supporting seat 4 and is adjacent to the spiral groove 9; a second operation opening 12 is arranged on the side part of the head cover 2 corresponding to the first operation opening 11 of the nail propping seat 4; for facilitating surgical observation, the hood 2 is a transparent hood body;
the cutting blade 25 is located on the nail pushing plate 6 and is slidably connected with the nail pushing plate 6, and the specific sliding connection mode is that a blade guide groove 35 is arranged on the nail pushing plate 6 along the axial direction of the outer tube 3, a convex block 36 is arranged on the contact surface of the cutting blade 25, which is slidably connected with the nail pushing plate 6, of the cutting blade 25, corresponding to the blade guide groove 35, and the convex block 36 is matched with the blade guide groove 35 to enable the cutting blade 25 to be slidably connected with the nail pushing plate 6;
the cutting blade 25 is a plate body, the front end of the plate body of the cutting blade 25 is provided with a cutter head 31 with a forward cutting edge, the plate body of the cutting blade 25 is provided with a yielding port 39 corresponding to the nail bin 5 and the stop block supporting seat 28, the nail bin 5 is located in the yielding port 39, the stop block supporting seat 28 is arranged on the yielding port 39 of the cutting blade 25, and the nail bin 5 is located in front of the stop block supporting seat 28; the limit stop 27 is slidably connected with the stop support seat 28 in a direction perpendicular to the plate body of the cutting blade 25, the end face of the rear end of the yielding port 39 is used as a limit end face 32, in the assembled state, the limit stop 27 is in contact fit with the limit end face 32 so that the cutting blade 25 is positioned relative to the outer tube 3, one end of the stop spring 29 is abutted against the limit stop 27, and the other end of the stop spring 29 is abutted against the outer tube 3; the limit stop 27 is provided with an unlocking hole 33;
the deflector rod 30 is positioned behind the stop block supporting seat 28, the deflector rod 30 is a rod body, the rod body is supported on the plate body of the cutting blade 25 along the axial direction of the outer tube 3, an inclined surface 34 is arranged on the rod body corresponding to the unlocking hole 33, and the inclined surface 34 can be in contact fit with the unlocking hole 33; in order for the shifter lever 30 to be more firmly supported on the cutting blade 25, the shifter lever 30 may have a specific structure: the rod body of the deflector rod 30 is mainly formed by integrally connecting a first section of rod body 37 and a second section of rod body 38, the diameter of the first section of rod body 37 is larger than that of the second section of rod body 38, the diameter of the second section of rod body 38 is smaller than that of the unlocking hole 33, the inclined plane 34 is arranged at the joint of the first section of rod body 37 and the second section of rod body 38, the first section of rod body 37 is supported on the plate body of the cutting blade 25, and the front end surface of the second section of rod body 38 faces the unlocking hole 33 and is supported on the stop block supporting seat 28;
the driving device comprises an inner tube 13, a push tube rack 14, a connecting rod 15 and a spanner 16, wherein the inner tube 13, the push tube rack 14 and the connecting rod 15 are arranged in the shell 1, the first driving end, the second driving end and the third driving end are arranged in the front end area of the inner tube 13, the inner tube 13 is positioned relative to the push tube rack 14 in the axial direction of the inner tube 13, the inner tube 13 can rotate relative to the push tube rack 14 around the central axis of the inner tube 13, one end of the connecting rod 15 is hinged with the push tube rack 14, the other end of the connecting rod 15 is hinged with one point on the end part of the spanner 16, the other point on the end part of the spanner 16 is hinged with the shell 1, and a handle 17 is arranged on the shell 1 corresponding to the spanner 16 in a protruding manner; the rear end of the nail pushing piece 6 is connected with the first driving end; the rear end of the deflector rod 30 is connected with the second driving end; one end of the blade spring 26 abuts against the third driving end, and the other end of the blade spring 26 abuts against the rear end of the plate body of the cutting blade 25;
a negative pressure pipe 18 for introducing negative pressure is arranged in the shell 1, the front end of the negative pressure pipe 18 is communicated with the rear end of the inner pipe 13, the rear end of the negative pressure pipe 18 is arranged outside the shell 1 in a penetrating way, and the rear end of the negative pressure pipe 18 can be used as a negative pressure suction interface to be connected with a negative pressure suction device; the middle part of the negative pressure pipe 18 is also provided with a negative pressure start-stop switch 40 for controlling the on and off of the negative pressure, and the negative pressure start-stop switch 40 is actually a valve.
In the use state, the first driving end drives the nail pushing plate 6 to move forward along the axial direction of the outer tube 3 until the nail pushing plate 6 pushes out the ligature nails in the nail bin 5, meanwhile, the second driving end drives the deflector rod 30 to slide forward along the axial direction of the outer tube 3 on the cutting blade 25, the third driving end pre-presses the blade spring 26, when the inclined surface 34 on the deflector rod 30 slides to the unlocking hole 33, the deflector rod 30 can force the limit stop 27 to slide upwards relative to the stop block supporting seat 28 in the direction vertical to the plate body of the cutting blade 25 until the limit end surface 32 is separated, and at the moment, the cutting blade 25 slides forward along the axial direction of the outer tube 3 on the nail pushing plate 6 and is launched out.
In a use state, a ligature nail 21 is arranged in the nail bin 5 of the hemorrhoid ligature cutter, the ligature nail 21 consists of a connecting part 23 and two nail feet 24, and the two nail feet 24 are respectively arranged on two end parts of the connecting part 23; the sum of the lengths of the two nail feet 24 is larger than the length of the connecting part 23 and smaller than twice the length of the connecting part 23, the length of a single nail foot 24 is smaller than the length of the connecting part 23, and the lengths of the nail feet 24 and the connecting part 23 are required to meet the three conditions at the same time, so that the two nail feet 24 can be staggered with each other and the nail feet and the connecting part are cohesive together after the ligature nail is formed; a plurality of ligature nails 21 are installed in the nail bin 5, a nail abutting spring is arranged in the nail bin 5, one end of the nail abutting spring abuts against the nail bin 5, the other end of the nail abutting spring abuts against the ligature nails 21, and the end parts of the nail feet 24 of the ligature nails 21 face the spiral groove 9.
The overall appearance of the ligator can be designed into a gun-type appearance, ethylene oxide sterilization is needed as a product, and the material of the product meets the requirements of GB/T16886.1. The ligating nail 21 material is made of a metal (e.g., stainless steel, titanium alloy) that meets the requirements of the implant. 6 to 8 ligature nails 21 can be arranged in the nail bin 5, and ligature cutting can be continuously carried out for 6 to 8 times.
Immediately after ligating the tissue, the tissue needs to be cut, and the specific structural design of the embodiment can realize continuous ligating and cutting actions. Namely, the continuous two actions of ligation and then cutting can be completed by firing the wrench once, and the specific structural design is that three driving ends are arranged on the same area position of the driving device in the shell 1 and are divided into three paths to respectively act on the nail pushing sheet 6, the deflector rod 30 and the cutting blade 25. The cutting blade 25 is located on the nail pushing sheet 6 and is connected with the nail pushing sheet 6 in a sliding way, the nail pushing sheet 6 is equivalent to a blade seat of the cutting blade, the stop block supporting seat 28 and the deflector rod 30 are supported on the cutting blade 25, a yielding port 39 is arranged on the cutting blade 25, the nail bin 5 is located in the yielding port 39, the cutting blade 25 is equivalent to the outside of the nail bin 5, in the assembled state, the limit stop block 27 on the stop block supporting seat 28 is abutted against the end face of the rear end of the yielding port 39, namely the limit end face 32, and the nail bin 5 is located at the forefront, the stop block supporting seat 28 is located in the middle and the deflector rod 30 is located at the rear, when the distance between the three is calculated, when the three driving ends are simultaneously pushed forward, the nail pushing sheet 6 acts on the ligature nail 21 in the nail bin 5, ligation is finished firstly, the third driving end always pre-presses the blade spring 26 to store ejection force for the emission of the cutting blade 25 in advance, when the second driving end drives the deflector rod 30 to slide forward on the cutting blade 25 along the axial direction of the outer tube 3 until the inclined surface is contacted with the unlocking hole 33, the deflector rod 30 forces the limit stop 27 to slide upwards relative to the stop support seat 28 in the direction perpendicular to the plate body of the cutting blade 25 until the limit stop face 32 is separated, and at the moment, the cutting blade 25 emits out to finish cutting tissues. The wrench is fired once again, so that two continuous actions of ligature cutting can be performed again, that is, the embodiment can continuously and repeatedly perform ligature cutting on tissues.
The operation flow is used: opening the sterile package; a negative pressure suction device is connected to the rear end of the negative pressure pipe 18; under the guidance of an auxiliary instrument anorectal scope, the ligator is adjusted or rotated; aligning the second operation port 12 of the head cap 2 with the tissue of the affected part; pressing the negative pressure start-stop switch 40, observing the attracted tissue from the transparent hood 2; the firing wrench 16 is held to the bottom to complete one ligation cut. The negative pressure start-stop switch 40 can be reset automatically. A second ligature pin 21 is in place and a further ligature cut can be made.
Some variations on example 1 illustrate:
(1) Regarding the sliding connection mode of the cutting blade 25 and the ejector pin sheet 6, the positions of the blade guide groove 35 and the protruding block 36 can be exchanged, that is, the ejector pin sheet 6 is provided with the protruding block 36, and the cutting blade 25 is provided with the blade guide groove 35 matched with the protruding block 36.
(2) The above-mentioned driving lever 30 is designed to be formed by integrally connecting a first segment of lever body 37 and a second segment of lever body 38, and the front end surface of the second segment of lever body 38 is supported on the stop support seat 28 toward the unlocking hole 33, which is an optimal solution, so that the driving lever 30 can be more stably supported on the cutting blade 25. The shift lever 30 may be designed to have only one segment of lever body, and the lever body must be provided with an inclined surface 34 corresponding to the unlocking hole 33.
(3) The specific structural form of the driving device belongs to the prior art, and other common structures in the prior art can be adopted.
Example 2: ligator for operation
Referring to fig. 11 and 12, the difference between embodiment 2 and embodiment 1 is the opening structure of the nail holder and the head cover, and the other structures of embodiment 2 are the same as those of embodiment 1. A first operation opening 11 for accommodating tissue of an affected part is formed on the plate body of the nail supporting seat 4 adjacent to the spiral groove 9 in embodiment 2, a first notch 19 is formed on the end surface of one side of the plate body of the nail supporting seat 4 adjacent to the spiral groove, and the first notch 19 is communicated with the first operation opening 11; the side part of the head cover 2 is provided with a second operation opening 12 and a second notch 20 corresponding to the first operation opening 11 and the first notch 19 of the nail supporting seat 4, and the second operation opening 12 and the second notch 20 are communicated. The structure can be used for carrying out negative pressure suction on tissues to be ligated or carrying out traction on auxiliary instruments, namely the structure can be used for two purposes. In the case of internal hemorrhoids, the internal hemorrhoids may be sucked under negative pressure by using only the first operation port 11 and the second operation port 12 with the cover provided on the second notch 20 closed, or the cover provided on the second notch 20 may be opened, and the internal hemorrhoids may be pulled into the first operation port 11 and the second operation port 12 through the first notch 19 and the second notch 20 by using an auxiliary instrument. For small blood vessels or other tubular tissue (e.g., a cholecyst tube), the cap on the second notch 20 is opened and the small blood vessels or other tubular tissue is pulled into the first and second ports 11 and 12 through the first and second notches 19 and 20 with an auxiliary instrument. In addition, embodiment 2 may be designed without a negative pressure tube 18, in which case the ligator of embodiment 2 is only suitable for pulling tissue into hood 2 with auxiliary instruments.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.