A bile duct cutter specially used for laparoscopic surgery

Abstract

The present invention discloses a bile duct cutter for laparoscopic surgery, and relates to the technical field of bile duct cutters. The present invention comprises a sleeve, an electrocoagulation hook and a push rod, wherein the electrocoagulation hook has a threading hole; the tail end of the electrocoagulation hook is hinged to the end of the push rod, and the push rod is slidably fitted in the sleeve; an adjuster is installed on the sleeve, and a pull wire is provided on the adjuster, and the pull wire is fastened to the threading hole; a retaining ring is provided in the sleeve, and the retaining ring divides the sleeve into a driving cavity and a contraction cavity for contracting the electrocoagulation hook, and a bevel ring is provided at the port of the contraction cavity, and the bevel of the bevel ring faces the inside of the contraction cavity, and a wire hole corresponding to the adjuster is opened on the sleeve. The present invention vertically contracts the electrocoagulation hook in the sleeve to avoid accidental damage to other organs when the electrocoagulation hook enters the abdomen.

Description

Technical Field

[0001] The invention belongs to the technical field of bile duct cutters, and in particular relates to a bile duct cutter specially used for laparoscopic surgery. Background Art

[0002] During laparoscopic common bile duct incision, there are currently two conventional ways to incise the common bile duct. One is to suspend hook needles on both sides of the incision and cut with a sharp knife in the middle, and the other is to directly coagulate the incision with an electrocoagulation hook head. These two methods have the following disadvantages: one requires suspending the two needle hooks of the common bile duct first, which wastes operation time. The needle hole of the common bile duct has potential bile leakage damage, the incision made by the knife is prone to bleeding, which interferes with the surgical field of view, and repeated incisions result in uneven incisions. The other method uses direct electrocoagulation hooks to coagulate, which is prone to contracture of the bile duct cut edge tissue, severe thermal damage to the bile duct cut edge tissue, and hinders the suture healing of the cut bile duct, resulting in postoperative bile leakage or bile duct stenosis. When the electrocoagulation hook is used for incision, the bile gushes out at the moment, which is easy to cause the electrocoagulation to fail, the cut edge is prone to bleeding, and further incisions with scissors also result in uneven incisions. Summary of the invention

[0003] The purpose of the present invention is to provide a bile duct cutter specially used for laparoscopic surgery, which can avoid accidental damage to other organs when the electrocoagulation hook is inserted into the abdomen by vertically contracting the electrocoagulation hook in a sleeve.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a bile duct cutter specially used for laparoscopic surgery, comprising a sleeve, an electrocoagulation hook and a push rod, wherein the electrocoagulation hook has a threading hole;

[0006] The tail end of the electrocoagulation hook is hinged to the end of the push rod, and the push rod is slidably fitted in the sleeve;

[0007] An adjuster is installed on the sleeve, a pull wire is arranged on the adjuster, and the pull wire is fastened to the threading hole.

[0008] Furthermore, a retaining ring is provided in the sleeve, and the retaining ring divides the sleeve into a driving chamber and a contraction chamber for contracting the electrocoagulation hook.

[0009] Furthermore, a bevel ring is provided at the port of the contraction cavity, and the bevel of the bevel ring faces the interior of the contraction cavity.

[0010] Furthermore, a wire hole corresponding to the regulator is opened on the sleeve.

[0011] Furthermore, a baffle is provided on the push rod, and a spring is sleeved on the push rod. One end of the spring is lower than the baffle, and the other end is in contact with the baffle ring. A sliding claw sleeve is installed at the tail end of the driving cavity. One end of the sliding claw sleeve is connected to the push rod, and the other end is installed with a pressing head.

[0012] Furthermore, the sliding claw sleeve and the push rod are connected through a change-direction joint, which includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are hinged, the first connecting rod is connected to one end of the sliding claw sleeve, and the second connecting rod is connected to the push rod.

[0013] Furthermore, a handle is installed at the rear end of the sleeve, and a control power interface is installed on the handle.

[0014] The present invention has the following beneficial effects:

[0015] The present invention vertically retracts the electrocoagulation hook in the sleeve to reduce the abdominal opening, and extends out to a limited position through a sliding claw sleeve. The port of the retraction cavity is provided with a bevel ring, and the bevel of the bevel ring faces the inside of the retraction cavity. The electrocoagulation hook extends outward against the inclined surface of the bevel ring, and the depth angle of the electrocoagulation hook can be adjusted by a pull rope. In clinical applications, compared with traditional suspended needle hooks and electrocoagulation forceps surgeries,

[0016] The invention has the advantages of protecting sharp objects from accidentally damaging abdominal organs when entering the abdomen; accurate incision without suspension, good hemostasis effect of incision, neat incision, little thermal damage to tissues, and easy control of incision length, which can greatly reduce the operation time.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the cutting knife;

[0020] Figure 2 is a schematic diagram of the structure of the sleeve;

[0021] Figure 3 It is a schematic diagram of the structure of the push rod, the change-of-direction joint, the sliding claw sleeve and the electrocoagulation hook;

[0022] Figure 4 It is a structural schematic diagram of the change-direction joint;

[0023] Figure 5 It is a schematic diagram of the structure of the cutting knife;

[0024] Figure 6 It is a structural schematic diagram of the electrocoagulation hook;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Electric coagulation hook; 2. Sleeve; 3. Spring; 4. Push rod; 5. Change knuckle; 6. Regulator; 7. Sliding claw sleeve; 8. Press head; 9. Pull wire; 10. Handle; 101. Threading hole; 201. Bevel ring; 202. Contraction chamber; 203. Retaining ring; 204. Drive chamber; 205. Wire hole; 501. First connecting rod; 502. Second connecting rod; 503. Bayonet; 504. Card plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] See also Figure 1-6 As shown, the present invention is a bile duct cutter for laparoscopic surgery, comprising an electrocoagulation hook 1. After the electrocoagulation hook 1 penetrates the bile duct, the bile duct is broken by energizing the electrocoagulation hook 1. The electrocoagulation hook 1 has a threading hole 101.

[0030] It also includes a sleeve 2 and a push rod 4. The tail end of the electrocoagulation hook 1 is hinged to the end of the push rod 4, and the push rod 4 is slidably fitted in the sleeve 2. Specifically, a retaining ring 203 is provided in the sleeve 2. The retaining ring 203 divides the sleeve 2 into a driving chamber 204 and a retraction chamber 202 for retracting the electrocoagulation hook 1. The electrocoagulation hook 1 is extended and retracted in the retraction chamber 202 by the push of the push rod 4.

[0031] The push rod 4 is powered by pressing the pressing head 8 .

[0032] Specifically, a baffle is provided on the push rod 4, and a spring 3 is sleeved on the push rod 4. One end of the spring 3 is lower than the baffle, and the other end is in contact with the baffle ring 203. A sliding claw sleeve 7 is installed at the tail end of the driving chamber 204. One end of the sliding claw sleeve 7 is connected to the push rod 4, and the other end is installed with a pressing head 8. The sliding claw sleeve 7 is used to limit the push rod 4. Pressing the pressing head 8 twice allows the electrocoagulation hook 1 to complete a retraction and extension in the retraction chamber 202.

[0033] The electrocoagulation hook 1 extends outward along the arc of the electrocoagulation hook 1 , and a bevel ring 201 is provided at the end of the contraction cavity 202 . The bevel of the bevel ring 201 faces the inside of the contraction cavity 202 , and the electrocoagulation hook 1 extends outward against the inclined surface of the bevel ring 201 .

[0034] Preferably, when the electrocoagulation hook 1 is tilted and unfolded, the push rod 4 tilts and moves, and the tilting of the push rod 4 is achieved by the direction-changing joint 5;

[0035] Specifically, the sliding claw sleeve 7 and the push rod 4 are connected through a change-direction joint 5, and the change-direction joint 5 includes a first connecting rod 501 and a second connecting rod 502. The first connecting rod 501 and the second connecting rod 502 are hinged, the first connecting rod 501 is connected to one end of the sliding claw sleeve 7, and the second connecting rod 502 is connected to the push rod 4. Specifically, both ends of the second connecting rod 502 are provided with a bayonet 503, and the ends of the push rod 4 and the first connecting rod 501 are provided with a clamping plate 504. The corresponding clamping plate 504 and the bayonet 503 are provided with through holes and are fixed by a pin, that is, a three-link rod is formed by the first connecting rod 501, the second connecting rod 502 and the push rod 4.

[0036] An adjuster 6 is installed on the sleeve 2, and a pull wire 9 is provided on the adjuster 6. The pull wire 9 is tied to the threading hole 101. A wire hole corresponding to the adjuster 6 is opened on the sleeve 2. After the electrocoagulation hook 1 extends out of the sleeve 2, the push rod 4 contacts the inclined surface of the bevel ring 201, and then the angle of the electrocoagulation hook 1 is adjusted by pulling the pull wire 9. The adjuster 6 includes a threaded barrel and a threaded rod. The end of the pull wire 9 is set at the end of the threaded rod. The pull wire 9 is pulled by twisting the threaded rod to change the position of the threaded rod on the threaded barrel, thereby fine-tuning the direction of the electrocoagulation hook.

[0037] A handle 10 is installed at the tail end of the sleeve 2, and a control power supply interface and a power switch of an external high-frequency electrosurgical generator are installed on the handle 10. The power supply interface and the electrocoagulation hook 1 are connected by a wire, and the power on and off of the electrocoagulation hook is controlled by the switch.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bile duct cutter for laparoscopic surgery, comprising a sleeve (2), characterized in that: An electrocoagulation hook (1), the electrocoagulation hook (1) having a threading hole (101); A push rod (4), the tail end of the electrocoagulation hook (1) is hinged to the end of the push rod (4), and the push rod (4) is slidably fitted in the sleeve (2); A regulator (6) is installed on the sleeve (2), a pull wire (9) is arranged on the regulator (6), and the pull wire (9) is fastened to the threading hole (101); A retaining ring (203) is provided inside the sleeve (2), and the retaining ring (203) divides the sleeve (2) into a driving chamber (204) and a contraction chamber (202) for contracting the electrocoagulation hook (1); A bevel ring (201) is provided at the port of the contraction cavity (202), and the bevel of the bevel ring (201) faces the interior of the contraction cavity (202); The sleeve (2) is provided with a wire hole (205) corresponding to the regulator (6); A baffle is provided on the push rod (4), a spring (3) is sleeved on the push rod (4), one end of the spring (3) is lower than the baffle, and the other end abuts against the baffle ring (203), a sliding claw sleeve (7) is installed at the tail end of the driving chamber (204), one end of the sliding claw sleeve (7) is connected to the push rod (4), and the other end is installed with a pressing head (8); The sliding claw sleeve (7) and the push rod (4) are connected via a change-direction joint (5), and the change-direction joint (5) comprises a first connecting rod (501) and a second connecting rod (502), the first connecting rod (501) and the second connecting rod (502) are hinged, the first connecting rod (501) is connected to one end of the sliding claw sleeve (7), and the second connecting rod (502) is connected to the push rod (4); A handle (10) is installed at the rear end of the sleeve (2), and a control power interface is installed on the handle (10).

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