CN102813537B - Circular purse-string forceps capable of automatically beating purse-strings - Google Patents

Abstract

The invention relates to circular purse-string forceps capable of automatically beating purse-strings. The forceps comprise a forceps body, a suture needle assembly, a suture needle driving device and a safety device, wherein an annular suture needle chute is arranged in the head of the forceps body; the suture needle assembly is installed in the annular suture needle chute in a slideable manner; the safety device is installed at the tail end of the forceps body and comprises a safety knob, a safety shaft and a locking block; the safety shaft is fixedly connected with the safety knob; the locking block is fixed on the safety shaft; the suture needle driving device is installed in the forceps body in a rotatable manner; the head of the suture needle driving device drives the suture needle assembly to move around the annular suture needle chute; and a clamp slot corresponding to the locking block of the safety device is arranged at the tail of the suture needle driving device. The circular purse-string forceps can ensure a defined amount of tissues on the purse-strings, and can automatically, conveniently and reliably beat the purse-strings.

Description

A kind of circular purse pliers capable of automatically packing purse

technical field

The invention relates to the field of medical instruments, in particular to a circular purse pliers capable of automatically making a purse.

Background technique

In surgical operations, since the invention of the first staple product in the 1960s, medical staplers have become an indispensable medical device in the process of assisting incision suturing.

With the development of medicine and the research and development of medical device products, more and more staple products are being used clinically. The scope of application of this type of product has involved gastrointestinal surgery, hepatobiliary surgery, thoracic surgery, urology, obstetrics and gynecology, and has become one of the indispensable tools for doctors. For patients, the application of such tools has the advantages of less intraoperative bleeding and shorter operation time, and the use of instruments instead of manual work can reduce errors and infections caused by manual work, thereby enabling patients to recover faster after surgery.

Doctors often use tubular staplers to perform end-to-end anastomosis of the digestive tract. Before the anastomosis, the tissue must be sutured at one end to implant the anvil of the tubular stapler, so that it can be firmly ligated after the central rod is placed, and then the tissue anastomosis can be performed. At present, many doctors sew the purse by hand, which cannot guarantee whether the amount of tissue in the purse is appropriate. If there is too much residual tissue, the stapler will fail to fire; if there is too little tissue, there will be a risk of fistula after anastomosis. Therefore, in the process of use, doctors are more and more using purse forceps to suture the purse. The performance of the instrument directly affects the operation process and plays a very important role in the operation effect.

There are mainly two types of purse pliers in actual use at present, one is a straight-line all-metal manual purse plier, and the other is a straight-line staple-type automatic purse plier.

For straight manual purse string forceps, a needle with a suture at the end is required to pass through the clamped jaws for manual purse string suture. During the operation, first clamp the tissue with the jaws, and then lock the notch, the human tissue will be clamped naturally and some tissues will be squeezed into the gap of the notch. Insert the needle into the upper round hole of the purse pliers, pull it out from the other side, then turn the needle around, and then pass through the lower round hole of the purse pliers, and finally tie the two ends of the purse string on one side, This requires at least twice the length of the purse-string forceps to complete the operation (needle requires a lot of space to operate), however for limited surgical sites such as rectal resection or esophagectomy, use this purse-string forceps to open The purse bag cannot complete the operation or there is a great risk of surgery. Due to the lack of a good surgical field of view and manual stitching, it is easy to injure other adjacent tissues and organs, and there is a huge risk of surgery.

The other is the straight-line staple-type automatic purse forceps. During the operation, the tissue is first clamped with the jaws, and then the notch is locked. The human tissue will be clamped naturally and a part of the tissue will be squeezed into the gap of the notch. At the same time, the staples press the purse string on the tissue. At this time, the notch is released and the instrument is pulled, and the purse string will be lifted along the track nailed by the staple for a certain length with the instrument (a wire compartment is built in the instrument, which can store 600mm long sutures) and purse. This instrument has great disadvantages for surgical sites with limited positions such as rectal resection or esophagectomy: firstly, the purse string can only be pulled along the transverse plane of the organ tissue, which requires a suitable operating space, otherwise it is easy The oblique force causes the staples to separate from the tissue, resulting in the failure of the purse bag. For the part with limited position, it is impossible to have a suitable operating space, so the risk of surgery in this kind of part is extremely high; If the pulling force is too large, the staples may fall into the human body. Due to the limited position and the small size of the staples, it is not easy to find the fallen staples, which may eventually cause the staples to remain in the human body, which may threaten the life of the patient.

This shows that there are obvious defects and deficiencies in the existing purse forceps, and how to create a purse stapler that can automatically, conveniently and reliably play the purse at the narrow part of the operation is one of the current important research and development issues.

Contents of the invention

The technical problem to be solved by the present invention is to provide a circular purse forceps that can automatically pack a purse, so that it can automatically, conveniently and reliably perform purse-packing when operations are performed on a limited position such as rectal resection or esophagus resection, thereby Overcome the deficiencies of the prior art.

In order to solve the above-mentioned technical problems, the present invention provides a circular purse pliers that can automatically pack a purse, including a pliers body, a sewing needle assembly, a sewing needle driving device and a safety device, wherein: an annular needle chute is arranged in the head of the pliers body The sewing needle assembly is slidably installed in the circular sewing needle chute; the safety device is installed at the tail end of the caliper body, including the safety knob, the safety shaft fixedly connected with the safety knob, and the locking mechanism fixed on the safety shaft block; the needle driving device is rotatably installed in the caliper, and its head drives the needle assembly to move around the annular needle chute, and a slot corresponding to the locking block of the safety device is provided at the tail.

As a further improvement of the present invention, the middle part of the needle driving device is a rotating shaft that is rotatably installed in the caliper body. The tail end of the rotating shaft is fixed with a driving knob, and the front end is fixed with a transmission gear. The transmission gear passes through the swing arm gear and The swing arm drives the needle assembly to move.

The locking slot is arranged at the tail of the rotating shaft of the needle driving device.

The cross-section of the tail of the rotating shaft is more than semicircular, and the clamping groove is a notch in the cross-section.

The locking block is a cubic structure.

A positioning pin is also fixed inside the safety knob, and a groove is provided on the pliers body to cooperate with the positioning pin to limit the rotation range of the safety knob.

After adopting the above design, the present invention has the following beneficial effects compared with the prior art: the circular automatic purse forceps is suitable for narrow surgical sites such as rectal resection or esophagectomy, and can ensure the right amount of tissue in the purse, automatic and convenient , Reliable packing.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

The above is only an overview of the technical solution of the present invention. In order to understand the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of the circular purse pliers capable of automatically packing purse according to the present invention.

Fig. 2 is a schematic diagram of the disassembled structure of the circular purse pliers capable of automatically packing purse according to the present invention.

Fig. 3 is a schematic diagram of an exploded structure of the fixed pliers body part of the present invention.

Fig. 4 is a schematic diagram of an exploded structure of the movable pliers body part of the present invention.

Fig. 5 is a schematic diagram of the structure of the sewing needle inserted into the needle cover in the closed state of the jaws of the present invention.

Fig. 6 is a schematic structural view of the needle assembly of the present invention.

Fig. 7 is a schematic diagram of an exploded structure of the needle driving device of the present invention.

Fig. 8 is a structural schematic diagram of the locking state of the safety device of the present invention.

Fig. 9 is a structural schematic diagram of the unlocked state of the safety device of the present invention.

Detailed ways

Please refer to Fig. 1 and Fig. 2 , a circular purse pliers capable of automatically making a purse according to the present invention includes a pliers body, a sewing needle assembly 3 , a sewing needle driving device 4 and a safety device 5 . In order to clearly describe the product structure of the present invention, the right side in Fig. 1 is used as the front side and the head, and the left side is used as the rear side and tail for illustration.

There is an annular needle chute in the head of the pliers, the needle assembly 3 is slidably installed in the annular needle chute, the safety device 5 is installed at the tail end of the pliers, and the needle driving device 4 is rotatable Installed in the body of the pliers, its head drives the needle assembly 3 to move around the annular needle chute, and a slot is provided at the tail.

Wherein, please refer to Fig. 8 and shown in Fig. 9, the safety device 5 of the present invention includes a safety knob 51, a safety shaft 52 fixedly connected with the safety knob 51, and a locking block 53 fixed on the safety shaft 52, the sewing needle The locking slot at the tail of the driving device 4 is set corresponding to the locking block 53 .

In addition, a positioning pin 54 can be fixed inside the safety knob 51 to cooperate with the groove on the fixed handle 11 to limit the rotation range of the safety knob 51 so that the locking block 53 can be accurately and quickly snapped into the slot.

Please refer to shown in Figure 7, the middle part of the sewing needle driving device 4 is a rotating shaft 41 that is rotatably installed in the pliers, the tail of the rotating shaft 41 is fixed with a driving knob 42, the head is fixed with a transmission gear 43, and the transmission gear 43 Mesh with swing arm gear 44, swing arm gear 44 is fixedly connected with sewing needle assembly 3 by swing arm 45, swing arm gear 44 is axially positioned by the boss at two ends, swing arm 45 one end links to each other with swing arm gear 44 by bolt, and the other One end is connected with the sewing needle assembly by a bolt. When the driving knob 42 rotates, the torsional force is transmitted to the swing arm 45 through the rotating shaft 41, the transmission gear 43, and the swing arm gear 44, and the swing arm 45 drives the sewing needle to move in the annular packaging chute.

The cooperation between the swing arm gear 44 and the transmission gear 43 can make the axis of the rotating shaft 41 offset relative to the axis of the swing arm gear 44, thereby providing space for the scissors to cut tissue during the operation. During the operation, after the process of inserting the needle and threading the purse forceps is completed, it is necessary to cut the tissue and loosen the jaws. At this time, the doctor can use scissors to cut the tissue from the side and front of the forceps body. Therefore, the design of the axis offset is very necessary.

Further, the cross-section of the tail of the rotating shaft 41 of the suture driving device can be designed to be more semicircular, and the slot is the gap in the cross-section, and the locking block 53 of the safety device 5 adopts a cubic structure to fit with the gap. Better stuck.

When the safety device 5 is in the locked state, the locking block 53 presses the draw-in groove of the rotating shaft 41, so that the rotating shaft 41 cannot be rotated by the driving knob 42, so that the sewing needle cannot move, which plays a role of insurance.

When using purse pliers, rotate the safety knob 51 to separate the locking block 53 from the draw-in groove of the rotating shaft 41. At this time, the locking state is released, and the driving knob 42 is turned, and the rotating shaft 41 can rotate with the driving knob 42, thereby driving the seam. Needle movement, carry out purse bag operation.

In addition, the pliers body of the present invention may consist of a fixed pliers body 1 and a movable pliers body 2 . Please refer to FIG. 3 , the fixed pliers body 1 includes a fixed handle 11 and a fixed head, and one side of the fixed head is provided with an arc-shaped toothed edge.

The fixed head is mainly assembled by the fixed pliers body front plate 12, the fixed pliers body rear plate 13, the top cover plate 14, the head bottom plate 15 and the head baffle plate 16 by bolts. Wherein, one side of the rear plate 13 of the fixed pliers body and the front plate 12 of the fixed pliers body is an arc-shaped toothed edge, and the angle corresponding to the toothed structure is not more than 180°. A circular needle chute is formed between them. The top cover plate 14 is fan-shaped, and is installed on the front surface of the front plate 12 of the fixed pliers body, corresponding to the part of the non-toothed structure. The head bottom plate 15 is a semicircle or more than semicircle, and is installed on the rear side of the fixed pliers body rear plate 13, corresponding to the part of the non-toothed structure. Head baffle plate 16 is installed on one side of fixed pliers body rear plate 13, cooperates with head base plate 15, closes the rear side space of fixed pliers body rear plate 13 non-toothed parts.

In addition, in the fixed head of the fixed pliers body 1 (for example, on the back piece 13 of the fixed pliers body), a wire slot 17 and a thimble baffle 18 are provided at one end of the toothed structure, and the outside of the wire slot 17 is covered by a wire slot baffle 19. Closed, absorbable sutures are housed in the wire groove 17, and the wire groove baffle plate 19 is plugged on the back piece 13 of the fixed forceps body through the slot.

Please refer to FIG. 4 , the movable pliers body 2 includes a handle portion 21, a fork portion 22 and an arc-shaped head 23, wherein the arc-shaped head 23 corresponds to the toothed edge of the fixed head of the fixed pliers body 1, A tooth-shaped structure that can be closed with the fixed head is provided, and the fork-shaped part 22 is fixedly connected with both ends of the arc-shaped head 23 .

Specifically, the outer side of the handle portion 21 can be covered with a handle sleeve 24 by using an interference fit. The arc-shaped head 23 of the movable pliers body 2 also can be assembled by bolts from the front and rear panels, and an arc-shaped sewing needle chute is provided between the front and the rear panels. The hollow structure of the fork has enough space for scissors to cut tissue during operation.

Preferably, between the front piece 12 of the fixed pliers body and the back piece 13 of the fixed pliers body, between the back piece 13 of the fixed pliers body and the head bottom plate 15, and between the front and back pieces of the curved head 23 of the movable pliers body 2 There are corresponding arc-shaped protrusions and grooves between them to ensure the accuracy of the connection position and improve the assembly efficiency.

The fixed handle 11 of the fixed pliers body 1 passes through the fork 22 of the movable pliers body 2, and is rotatably connected by a fixed pin 25. A jaw locking hook 26 is correspondingly provided. The jaw locking hook 26 can be an L-shaped barb as shown in Figure 4, when the handle portion 21 of the movable pliers body 2 is pressed down, the two L-shaped barbs are hooked together, and the fixed head of the fixed pliers body 1 and the The arc-shaped head of the movable pliers body 2 is closed and locked. If the movable pliers body is to be loosened, it must be ensured that the sewing needle returns to the initial position, and then a certain lateral force is applied on the handle portion 21 of the movable pliers body 2, and the L-shaped barbs are disengaged from each other, and the jaws can be opened.

Please refer to Figure 5, the fixed head of the fixed pliers body 1 and the arc-shaped head of the movable pliers body 2 are closed to form a complete circle, the diameter of which is between 30-80mm, and the purse-string pliers after closing There is a complete circular sewing needle chute in the head, and the sewing needle assembly 3 is installed in the circular sewing needle chute.

Please refer to FIG. 6, the needle assembly 3 includes a needle seat slider 31 and an inner sewing needle 32 and an outer sewing needle 33 that are inserted into the needle seat slider 31 and locked by screws. The needle seat slider 31 is an arc Block, the needle bodies of the inner and outer sewing needles are arc-shaped, the cross-section of the needle body is a circle of 0.6-3mm, and the head is tapered and provided with barbs.

Correspondingly, please refer to Fig. 5 and Fig. 6. The circular needle chute is two thinner and parallel inner and outer needle chute in the section corresponding to the toothed structure, and the section corresponding to the non-toothed structure Then it is a wider slider chute. And two sutures should also be accommodated in the wire groove 17, and the suture ends protrude from the thimble baffle plate 18, and are connected with the inner needle cover 34 and the outer needle cover 35 respectively. The interior of the inner and outer needle covers is hollow, which is equivalent to the cross-sectional diameter of the inner and outer needle bodies. The edges are chamfered and in the shape of an inverted cone, and the head is slotted so that the needle can be inserted smoothly. There can also be a transition section between the connecting needle and the needle body. At the transition section, the needle forms an obvious boss to hang the slot on the head of the needle sleeve. After the needle rotates in place, it will squeeze into the needle sleeve and hook the needle sleeve tightly. , enabling the needle sheath to be brought back.

The initial position of the sewing needle is located at one end of the toothed structure of the purse pliers head, and the needle cover is located at the other end. The tunnel is wound in the wire groove 17 . The needle passes through the tissue clamped between the fixed pliers body 1 and the movable pliers body 2 along the annular needle chute, and moves to the needle cover, the needle head is inserted into the needle cover, and then the needle is rotated reversely, and the barb handle of the needle The needle sheath is brought back, allowing the suture to pass through the tissue.

During use, first the jaw locking hook 26 is opened, the intestinal tract that needs to be purged is put into the jaw, the handle part 21 of the movable pliers body 2 is closed, the jaw locking hook 26 is blocked, and the wallet jaw is kept The closed and locked state keeps the intestinal tissue in a compressed state.

Toggle the safety knob 51 to open the safety so that the driving knob 42 can rotate. When the driving knob 42 rotates about one-half of the circle, the torsional force is transmitted to the needle seat slider 31 through the rigidly connected needle driving device 4, thereby pushing the needles 32, 33 on the needle seat slider 31 to move in a circle. The needle moves in the chute, and the needle pierces the human tissue in the gap between the jaws. When the needle point rotates to the needle sleeve at the other end of the chute, the needle is inserted into the needle sleeve and locked by the barb, and at the same time, the needle will push the needle sleeve against the On the thimble stopper 18, the driving knob 42 cannot be further rotated to ensure that the needle head and the needle cover are connected in place.

Afterwards, the driving knob 42 is reversely rotated, and the needle cover is brought back by the sewing needle, and the suture at the tail of the needle cover is passed through the human tissue through the part where the jaws are closed. When the needle cover is pulled to the other side of the jaws by the needle, the needle cover and the sutures connected at the back pass through the tightened human tissue, and the two purse strings pass through the two sides of the tissue respectively. The tooth shape action makes the purse string through the tissue section by section. After rotating the driving knob 42 for about 1/2 of the circle, the hand has a shock feeling that the hook is stuck, and the sewing needle assembly 3 returns to the initial position at this moment.

Finally, open the jaws to lock the hook 26, pull the purse pliers to release the sewing money, and when the released thread is enough, cut the sutures on both sides, take out the purse pliers, stretch the sutures on both sides, adjust the position, and insert the stapler The head of the stapler is placed in the tissue, the sutures on both sides are tightened, and the sutures are tied to the central rod of the head of the circular stapler to tighten manually, and the purse bag is completed.

The round automatic purse forceps are suitable for narrow surgical sites with limited positions such as rectal resection or esophagectomy, and can also be used for operations on other parts with large operating space.

The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Those skilled in the art make some simple modifications, equivalent changes or modifications by using the technical content disclosed above, all of which fall within the scope of the present invention. within the scope of protection of the invention.

Claims (5)

1. automatically can beat a circular purse string clamp for pocket, it is characterized in that comprising caliper, suture needle assembly, suture needle driving device and safety, wherein:

Annular suture needle chute is provided with in caliper head;

Suture needle assembly is slidably arranged in described annular suture needle chute;

Safety are arranged on caliper tail end, comprise insurance knob, the safety axis be fixedly connected with insurance knob and the latch segment be fixed on safety axis;

Suture needle driving device is rotating to be arranged in caliper, and its head drives suture needle assembly to move around annular suture needle chute, and is provided with the draw-in groove corresponding with the latch segment of safety at afterbody;

The middle part of described suture needle driving device is the rotating rotating shaft be arranged in caliper, and rotating shaft tail end is fixed with drive knob, and front end is fixed with travelling gear, and travelling gear drives suture needle assembly to move by swing arm gear and swing arm.

2. the circular purse string clamp automatically can playing pocket according to claim 1, is characterized in that described draw-in groove is arranged on the afterbody of the rotating shaft of suture needle driving device.

3. the circular purse string clamp automatically can playing pocket according to claim 2, it is characterized in that the cross section of described rotating shaft afterbody is for mostly circular, described draw-in groove is the breach of this cross section.

4. the circular purse string clamp automatically can playing pocket according to claim 3, is characterized in that described latch segment is cube structure.

5. the circular purse string clamp automatically can playing pocket according to any one of claim 1-4, is characterized in that also being fixed with alignment pin inside described insurance knob, and is provided with on caliper and limits with this detent fit the groove insuring knob scope.