An automatic intraperitoneal vascular ligation device

Abstract

The present invention discloses an automatic intraperitoneal blood vessel ligation device, belonging to the field of blood vessel ligation auxiliary tools. An automatic intraperitoneal blood vessel ligation device includes a ligation thread, an internal wire member, an external wire member, a wire winding member, and a blocking member; the internal wire member, the external wire member, and the wire winding member are sequentially distributed from inside to outside; the head end of the ligation thread is provided with a fixed point, and the tail end is clamped at the front end of the internal wire member; after the ligation thread starts from the fixed point and evenly winds around the outside of the external wire member for several turns to form a winding coil, it extends into the first gap between the external wire member and the winding coil and returns to the fixed point to extend out; the winding coil and the wire winding member are sleeved in parallel on the outside of the external wire member, and the fixed point is located on the side far from the wire winding member. It uses a brand-new ligation thread ligation method to replace titanium clips, greatly reducing the cost, and at the same time solving problems such as foreign body sensation, falling off, and patient psychology.

Description

Technical Field

[0001] The present invention relates to the field of vascular ligation assisting tools, and more specifically, to an automatic intraperitoneal vascular ligation device. Background Art

[0002] In laparoscopic minimally invasive surgery, after partial organs are resected, the blood vessels supplying the organs need to be permanently ligated. Especially in laparoscopic cholecystectomy, after the gallbladder is removed, the cystic duct and the cystic artery need to be ligated. Different from open surgery, the surgeon can manually ligate the blood vessels with ligature. In laparoscopic minimally invasive surgery, since the operations all rely on specific surgical instruments, and there is currently no suitable instrument. Currently, according to the material and use, doctors are used to classifying them into metal titanium ligating clips, hem-o-lok polymer plastic ligating clips, and absorbable biological ligating clips for ligating and anastomosing blood vessels and tissues in the body.

[0003] Due to the characteristics of its metal material, the metal titanium ligating clip will bring many disadvantages after use. For example: when encountering electrocoagulation with an electrocoagulator during the operation, it is easy to conduct current and damage tissues; after the tissue clamped swells and gradually subsides after the operation, the ligating clip is prone to loosening, wandering, premature detachment and other phenomena, failing to play the due ligating and closing role, resulting in bile leakage or bleeding and causing abdominal infection; it is easy to cause interference in imaging examinations and affect diagnosis; and the potential harm caused by foreign bodies remaining in the body; the psychological impact on patients, etc. Therefore, the metal titanium ligating clip is gradually withdrawing from the market. The hem-o-lok polymer plastic ligating clip can well overcome the problems caused by the material, but its cost is relatively high, and there are still problems such as foreign bodies, detachment, and patient psychology. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an automatic intraperitoneal vascular ligation device, which can realize replacing disposable ligating clips with a brand-new ligature ligation method, greatly reducing the cost, and at the same time solving problems such as foreign body sensation, detachment, and patient psychology.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] An automatic intraperitoneal blood vessel ligation device, comprising a ligation thread, an internal wire member, an external wire member, a wire take-up member and a blocking member; the internal wire member, the external wire member and the wire take-up member are distributed in sequence from inside to outside; the head end of the ligation thread is provided with a fixed point, and the tail end is clamped at the front end of the internal wire member; after the ligation thread starts from the fixed point and evenly winds around the outside of the external wire member for several turns to form a winding coil, it extends into the first gap between the external wire member and the winding coil and returns to the fixed point to extend out; the winding coil and the wire take-up member are sleeved in parallel on the outside of the external wire member, the fixed point is located on the side away from the wire take-up member, and the second gap between the wire take-up member and the external wire member is smaller than the first gap, so that the wire take-up member can push the ligation thread along the outer wall of the external wire member to complete the wire take-up operation; a switching mechanism is arranged between the internal wire member and the external wire member; when the tail end of the ligation thread is at the front end of the external wire member, an "L"-shaped entry channel is formed between the front ends of the internal wire member and the external wire member; when the tail end of the ligation thread is switched to the front end of the internal wire member through the switching mechanism, the entry channel is closed; the blocking member is fixedly connected to the wire take-up member, and the blocking member is located outside the winding coil, and the blocking member is used to prevent blood vessels from entering the inside of the winding coil.

[0007] Further, the ligation thread includes a thread head and a thread body which are fixedly connected; the thread head is made of a hard material, the thread body is made of a soft material, and the thread head is clamped in a clamping hole opened on the external wire member; a torsion spring is connected between the end of the thread head away from the thread body and the switching mechanism.

[0008] Further, the internal wire member includes an inner sleeve and a wire guide block which are integrally connected, the inner sleeve is located inside the external wire member, and the switching mechanism is connected to the side of the wire guide block away from the inner sleeve.

[0009] Further, the external wire member includes an outer sleeve, a wire lead block and a partition which are integrally connected, the outer sleeve is located between the internal wire member and the wire take-up member, one side of the wire lead block close to the central axis of the outer sleeve is provided with an inclined surface, the tail end of the ligation thread is clamped on the inclined surface, and the switching mechanism is located on the side of the inclined surface close to the central axis of the outer sleeve; the partition is fixedly connected to the inner side wall of the outer sleeve, a slideway matching with the partition is opened on the side wall of the internal wire member, and the partition is inserted into the slideway and extends into the inside of the internal wire member.

[0010] Further, a limit convex ring is arranged at the outer end of the outer sleeve, and the limit convex ring is located on the outer sleeve close to the wire lead block, and the fixed point is located between the limit convex ring and the wire take-up member.

[0011] Further, a positioning column is fixedly connected to the outer wall of the external wire member, and the positioning column is located on the side of the wire take-up member away from the ligation thread, and a sleeve buckle is connected to the outer wall of the wire take-up member through a rotating shaft, and a through hole matching with the positioning column is opened on the sleeve buckle.

[0012] Further, the switching mechanism includes a first positioning portion and a second positioning portion. The second positioning portion is connected to an external wire member and is hook-shaped. The first positioning portion is fixed to an internal wire member and is provided with a perforation matching the hook shape. The first positioning portion is located on the side of the second positioning portion away from the ligation thread, and the first positioning portion and the second positioning portion can be engaged with each other.

[0013] Further, at least one redundant portion is provided on the ligation thread, and the redundant portion is located between two adjacent winding turns.

[0014] Further, when the thread end is in a vertical state, the partition is located between the thread end and the inclined surface.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] First, this solution replaces the blood vessel ligation method in minimally invasive laparoscopic surgery with a new ligation method of the ligation thread, effectively avoiding the problems existing in the existing disposable ligation clips and reducing the cost.

[0017] Second, the ligation thread of this solution has completed a special winding method through various mechanical structures, and the ligation is more firm and the ligation thread is not easy to fall off. Specifically, by setting a fixed point, starting from the fixed point, winding evenly for several turns, then looping back from the inside to the fixed point and extending out, then passing through the outside of the place where the blood vessel needs to be ligated and extending out of the loop, and finally tightening and cutting off the redundant part. Because the fixed point and the blood vessel are firmly clamped and not easy to loosen, the ligation is very firm.

[0018] Third, this solution realizes a series of complex wire winding methods mainly through an internal wire member, an external wire member, a wire take-up member, a switching mechanism and a blocking member. The external wire member is used to send the thread end to the blood vessel ligation site. At this time, the internal wire member and the external wire member are separated to facilitate the opening of the channel and the entry of the blood vessel. After entry, the thread end is transposed to the internal wire member through the switching mechanism so that the thread end can pass through the outside of the blood vessel, and then the internal wire member is pulled to make the thread end inside the loop, and then the external wire member is withdrawn. Finally, the wire body is tightened through the blocking member and the wire take-up member to complete the ligation. When trimming, the redundant wire body is cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention after removing the blocking member;

[0020] Figure 2 is Figure 1 the structural schematic diagram at position A in

[0021] Figure 3 is a three-dimensional structural schematic diagram of the ligation thread of the present invention;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the card hole position of the present invention;

[0023] Figure 5 Schematic three-dimensional structure diagram of the internal wire part of the present invention;

[0024] Figure 6 Schematic three-dimensional structure diagram of the external wire part of the present invention;

[0025] Figure 7 is Figure 6 Schematic structure diagram at position B in

[0026] Figure 8 Schematic three-dimensional structure diagram of the buckle part of the present invention;

[0027] Figure 9 Schematic three-dimensional structure diagram of the present invention;

[0028] Figure 10 Schematic structure diagram of the L-shaped channel of the present invention;

[0029] Figure 11 Schematic structure diagram when the wire head of the present invention is in a vertical state (the dotted line is the blood vessel);

[0030] Figure 12 Schematic structure diagram when the ligating wire of the present invention is ligated (the dotted line is the blood vessel).

[0031] Explanation of the reference numerals in the figure:

[0032] 1 Ligating wire, 1a Fixing point, 10 Redundant part, 11 Wire head, 12 Wire body, 13 Torsion spring;

[0033] 2 Internal wire part, 21 Inner sleeve, 22 Wire block, 23 Slideway;

[0034] 3 External wire part, 3a Card slot, 30 Positioning post, 31 Outer sleeve, 310 Blocking ring, 32 Lead block, 33 Partition;

[0035] 4 Wire collecting part, 40 Buckle;

[0036] 5 Switching mechanism, 51 First positioning part, 52 Second positioning part;

[0037] 6 Blocking part. Detailed implementation mode

[0038] Example 1:

[0039] Please refer to Figures 1-12, An automatic ligation device for intraperitoneal blood vessels, which mainly includes a ligation thread 1, an internal wire member 2, an external wire member 3, a wire take-up member 4, and a blocking member 6. The internal wire member 2, the external wire member 3, and the wire take-up member 4 are distributed from the inside to the outside. The ligation thread 1 is sleeved outside the external wire member 3 and is sleeved in parallel with the wire take-up member 4. The gap between the wire take-up member 4 and the external wire member 3 is smaller than the minimum gap between the ligation thread 1 and the external wire member 3, so that when the wire take-up member 4 is pushed along the external wire member 3, the wire take-up member 4 can push the ligation thread 1. The outer shapes of the wire take-up member 4 and the blocking member 6 are both cylindrical tubes.

[0040] Please refer to Figures 1-3 , The ligation thread 1 is wound around the outside of the external wire member 3 in a special way. The ligation thread 1 includes a thread head 11 and a thread body 12 that are fixedly connected; the thread head 11 is made of a hard material, and the thread body 12 is made of a soft material. The head end of the thread body 12 has a fixed point 1a. After starting from the fixed point 1a, it winds around the outside of the external wire member 3 several times in the direction close to the wire take-up member 4. The circles do not overlap with each other and are evenly distributed. When winding the last circle, it passes back through the first gap between the ligation thread 1 and the external wire member 3 to the fixed point 1a and extends out. After extending out, it is fixed to the thread head 11 clamped in the clamping hole 3a. The clamping hole 3a is opened on the inclined surface of the lead block 32. In this figure, the ligation thread 1 is formed by folding a single thread into a double thread. In actual situations, the appropriate number of threads can be selected according to the ligation needs. The fixed point 1a is generated by the self-fixation of the head end of the thread body 12 and its winding, which is beneficial to always clamp the head end of the thread body 12 after the winding circles are tightened (see Figure 12 ). One end of the thread head 11 far from the thread body 12 is connected to the second positioning portion 52 through a torsion spring 13. The shape of the groove corresponding to the torsion spring 13 opened at the lower end of the second positioning portion 52 can be set, so as to limit the rotation range of the thread head 11. The maximum included angle between the thread head 11 and the inclined surface is preferably an acute angle, which can be 30 degrees, so that the center line of the included angle is vertical. In this way, it is convenient for the thread head 11 to move upward without pulling the blood vessel, and it is also convenient for the inclined surface of the lead block 32 to move upward without dragging the blood vessel, which is more beneficial to the withdrawal of the external wire member 3.

[0041] Please refer to Figures 4-5 , A switching mechanism 5 is provided between the internal wire member 2 and the external wire member 3. The switching mechanism 5 includes a first positioning portion 51 and a second positioning portion 52. The second positioning portion 52 is hook-shaped and is detachably connected to the external wire member 3; the first positioning portion 51 is fixed to the internal wire member 2 and is provided with a perforation matching the hook shape; the first positioning portion 51 is located on the side of the second positioning portion 52 far from the thread body 12 of the ligation thread 1.

[0042] Please refer to Figure 5, the internal wire member 2 includes an inner sleeve 21 and a wire block 22 that are integrally connected. The inner sleeve 21 is located inside the outer wire member 3, and the first positioning portion 51 is connected to the side of the wire block 22 away from the inner sleeve 21.

[0043] Please refer to Figures 6-7 , the outer wire member 3 includes an outer sleeve 31, a lead block 32, and a partition 33 that are integrally connected. The outer sleeve 31 is located between the internal wire member 2 and the wire take-up member 4. A limiting convex ring 310 is provided at the outer end of the outer sleeve 31, and the limiting convex ring 310 is located on the outer sleeve 31 near the lead block 32. The limiting convex ring 310 can prevent the winding coil from disengaging from the outside of the outer wire member 3 when the wire take-up member 4 does not push the winding coil, and the winding coil can cross the limiting convex ring 310 when pushed. The fixing point 1a is located between the limiting convex ring 310 and the wire take-up member 4. The side of the lead block 32 close to the central axis of the outer sleeve 31 is set as an inclined surface. The end of the ligation wire 1 is clamped in the clamping hole 3a on the inclined surface. The second positioning portion 52 is located on the side of the inclined surface close to the central axis of the outer sleeve 31; the partition 33 is fixedly connected to the inner side wall of the outer sleeve 31. A slideway 23 matching the partition 33 is provided on the internal wire member 2, and the partition 33 is inserted into the slideway 23 and extends into the internal wire member 2.

[0044] Please refer to Figure 1 , a positioning post 30 is fixedly connected to the outer wall of the outer wire member 3, and the positioning post 30 is located on the side of the wire take-up member 4 away from the ligation wire 1. A sleeve buckle 40 is connected to the outer wall of the wire take-up member 4 through a rotating shaft. A through hole matching the positioning post 30 is provided on the sleeve buckle 40. Putting the sleeve buckle 40 on the positioning post 30 can relatively position the outer wire member 3 and the wire take-up member 4. Similarly, the internal wire member 2 can also be positioned, so that the internal wire member 2, the outer wire member 3, and the wire take-up member 4 are restricted from moving randomly before use. The internal wire member 2 and the outer wire member 3 can also be restricted to linearly slide in the length direction of the inner wall of the wire take-up member 4 through a chute and a slider, so as to prevent the internal wire member 2, the outer wire member 3, and the wire take-up member 4 from rotating relative to each other and affecting the engagement of the first positioning portion 51 and the second positioning portion 52. At the same time, the movement length of the slider can be restricted by the chute, thereby restricting the maximum and minimum degrees of relative sliding between the internal wire member 2, the outer wire member 3, and the wire take-up member 4. This part can be set according to the actual use situation and will not be elaborated here.

[0045] Please refer to Figure 3 , at least one redundant portion 10 is provided on the ligation wire 1, and the redundant portion 10 is located between two adjacent winding coils. When the wire head 11 is pulled back, there is enough wire body 12 to pass through the winding coil, so as to prevent the wire head 11 from still being in the winding coil when the winding coil is pushed down from the outer sleeve 31 by the wire take-up member 4, affecting the tightening of the winding coil.

[0046] Please refer to Figures 9-10, the blocking member 6 is fixedly connected to the wire winding member 4, and the blocking member 6 is located outside the winding coil. When the internal wire member 2 and the external wire member 3 are pulled back, the blocking member 6 can block the blood vessel from entering the winding coil.

[0047] Please refer to Figure 11 , when the head end 11 of the wire is in a vertical state, the head of the head end 11 is located on the side of the partition 33 away from the inclined surface, overcoming the restoring force of the torsion spring 13, so that in the L-shaped channel, the tail of the head end 11 is not easily tilted too much due to the elastic force and touch the blood vessel.

[0048] During operation, please refer to Figure 10 , the blood vessel can enter through the L-shaped channel without obstruction. When it is necessary to wind the wire after entering, first unlock the internal wire member 2 so that it can be pulled back. Hold the wire winding member 4 and pull back the internal wire member 2. The first positioning portion 51 moves towards the direction close to the partition 33 along with the internal wire member 2 until the first positioning portion 51 engages with the second positioning portion 52 and drives the second positioning portion 52 and the head end 11 to move together. The torsion spring 13 always has a force that makes the tail of the head end 11 rotate towards the external wire member 3. When the head of the head end 11 is driven to move by the second positioning portion 52, the part in the positioning hole 3a moves and rotates gradually and disengages from the positioning hole 3a. Since the minimum distance between the positioning hole 3a and the partition 33 is set to be less than the length of the head end 11, when the tail of the head end 11 disengages from the positioning hole 3a, the head enters the side of the partition 33 away from the inclined surface at the torsion spring 13. Due to the limiting effect of the partition 33, the head end 11 is continuously pressed and is not easily rebounded to touch the blood vessel, that is Figure 11 In this state, continue to move until the head end 11 crosses the partition 33. The head end 11 will return to an inclined state only under the elastic force of the torsion spring 13, and it is not easy to move back to the inclined surface under the block of the rear end of the partition 33. At this time, the external wire member 3 can be unlocked so that it can be pulled back (here, the pull-back prompt can be carried out through the above-mentioned limitation of the lengths of the slider and the sliding groove). Due to the setting of the inclined surface and the blocking effect of the blocking member 6, it is not easy to bring the blood vessel back.

[0049] While holding the wire winding member 4 and pulling back the external wire member 3, since the second gap is smaller than the first gap, the wire winding member 4 can push the wire body 12 to slowly disengage from the external wire member 3. At the same time, the head end 11 is pulled back to drive the wire body 12 to tighten. When the wire body 12 is completely disengaged from the external wire member 3 and gradually tightens, as Figure 12 shown, the wire body 12 ligates the blood vessel, and finally the redundant part at the tail of the wire body 12 is cut off. Since the winding coil tightens and clamps the head end of the wire body 12, the tighter the winding coil, the firmer the clamping of the head end of the wire body 12, which is not easy to cause the wire body 12 to become loose and the ligation is more firm.

Claims

1. An automatic intraperitoneal blood vessel ligation device, characterized in that: it includes a ligation thread (1), an internal wire member (2), an external wire member (3), a wire take-up member (4) and a blocking member (6); The internal wire member (2), the external wire member (3) and the wire take-up member (4) are distributed in sequence from inside to outside; The head end of the ligation thread (1) is provided with a fixed point (1a), and the tail end is clamped at the front end of the internal wire member (2); After the ligation thread (1) starts from the fixed point (1a) and evenly winds around the outside of the external wire member (3) for several turns to form a winding coil, it then extends into the first gap between the external wire member (3) and the winding coil and returns to the fixed point (1a) to extend out; The winding coil and the wire take-up member (4) are sleeved in parallel on the outside of the external wire member (3), the fixed point (1a) is located on the side away from the wire take-up member (4), and the second gap between the wire take-up member (4) and the external wire member (3) is smaller than the first gap, so that the wire take-up member (4) can push the ligation thread (1) along the outer wall of the external wire member (3) to complete the wire take-up operation; A switching mechanism (5) is provided between the internal wire member (2) and the external wire member (3); when the tail end of the ligation thread (1) is at the front end of the external wire member (3), an "L"-shaped entry channel is formed between the front ends of the internal wire member (2) and the external wire member (3); when the tail end of the ligation thread (1) is switched to the front end of the internal wire member (2) through the switching mechanism (5), the entry channel is closed; The blocking member (6) is fixedly connected to the wire take-up member (4), and the blocking member (6) is located outside the winding coil, and the blocking member (6) is used to prevent blood vessels from entering the inside of the winding coil; The ligation thread (1) includes a wire head (11) and a wire body (12) fixedly connected; the wire head (11) is made of a hard material, the wire body (12) is made of a soft material, and the wire head (11) is clamped in a positioning hole (3a) opened on the external wire member (3); a torsion spring (13) is connected between the end of the wire head (11) away from the wire body (12) and the switching mechanism (5); The external wire member (3) includes an integrally connected outer sleeve (31), a lead block (32) and a partition plate (33), the outer sleeve (31) is located between the internal wire member (2) and the wire take-up member (4), one side of the lead block (32) close to the central axis of the outer sleeve (31) is set as an inclined surface, the tail end of the ligation thread (1) is clamped on the inclined surface, and the switching mechanism (5) is located on the side of the inclined surface close to the central axis of the outer sleeve (31); the partition plate (33) is fixedly connected to the inner side wall of the outer sleeve (31); When the wire head (11) is in a vertical state, the partition plate (33) is located between the wire head (11) and the inclined surface; the minimum distance between the positioning hole (3a) and the partition plate (33) is smaller than the length of the wire head (11); The switching mechanism (5) includes a first positioning portion (51) and a second positioning portion (52). The second positioning portion (52) is connected to the external wire member (3) and is hook-shaped. The first positioning portion (51) is fixed to the internal wire member (2) and is provided with a perforation matching the hook shape. The first positioning portion (51) is located on the side of the second positioning portion (52) away from the ligation thread (1), and the first positioning portion (51) and the second positioning portion (52) can be engaged with each other.

2. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: The internal wire member (2) includes an inner sleeve (21) and a wire block (22) integrally connected. The inner sleeve (21) is located inside the external wire member (3), and the switching mechanism (5) is connected to the side of the wire block (22) away from the inner sleeve (21).

3. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: A slideway (23) matching the partition plate (33) is provided on the side wall of the internal wire member (2), and the partition plate (33) is inserted into the slideway (23) and extends into the internal wire member (2).

4. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: The maximum angle between the thread end (11) and the inclined surface is an acute angle.

5. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: A limiting convex ring (310) is provided at the outer end of the outer sleeve (31), and the limiting convex ring (310) is located on the outer sleeve (31) near the lead block (32). The fixed point (1a) is located between the limiting convex ring (310) and the wire take-up member (4).

6. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: A positioning post (30) is fixedly connected to the outer wall of the external wire member (3), and the positioning post (30) is located on the side of the wire take-up member (4) away from the ligation thread (1). A sleeve buckle (40) is connected to the outer wall of the wire take-up member (4) through a rotating shaft, and a through hole matching the positioning post (30) is provided on the sleeve buckle (40).

7. An automatic intraperitoneal blood vessel ligation device according to claim 1, characterized in that: At least one redundant portion (10) is provided on the ligation thread (1), and the redundant portion (10) is located between adjacent winding turns.

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