A tubular tissue ligator

Abstract

The present invention relates to a tubular tissue ligator, which comprises a needle head, a catheter, an operating tube and a guide needle. The needle head, the catheter and the operating tube are connected in sequence from front to back. The needle head is in a spiral hook shape, and its hook body can wind around the tubular tissue to be ligated for at least one week. A guide needle accommodating cavity is arranged at the front part of the needle head. The catheter is provided with a guide needle outlet corresponding to the position of the guide needle accommodating cavity. One end of the guide needle is arranged in the operating tube and is connected with a guide needle pushing mechanism also arranged in the operating tube. The other end of the guide needle is arranged in the catheter and a detachable connecting part is arranged at the end part. A ligating thread is connected to the connecting part. The binding force between the guide needle and the connecting part is less than the binding force between the guide needle accommodating cavity and the connecting part. The structure of the present invention is simple, easy to manufacture and has a wide application range. At the same time, compared with conventional equipment and means, the present invention has less surgical trauma, is more convenient to implement, causes less pain to patients, has less possibility of making mistakes and less surgical risk.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a tubular tissue ligator. Background Art

[0002] In current surgeries, the ligation steps for human tubular tissues (such as the great saphenous vein, fallopian tube, vas deferens, etc.) are usually as follows: First, the human tissue is incised, then the tubular tissue to be ligated is clamped out, ligated with a suture thread or a ligation ring, and then the ligated tissue is put back into the human body, and the human wound is sutured. This step is not only cumbersome, requires high skills, has poor ligation firmness, but also causes large surgical trauma and increases the pain of patients. At the same time, because each patient has different body builds, the depth of the incised tissue also varies from person to person, increasing the uncertainty of the surgery and also increasing the surgical risk. Summary of the Invention

[0003] The present invention overcomes the deficiencies of the prior art and provides a tubular tissue ligator with less pain for patients and less surgical trauma.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A tubular tissue ligator is provided, which is characterized in that it includes a needle head, a catheter, an operating tube, and a guide needle. The needle head, the catheter, and the operating tube are connected in sequence from front to back. The needle head is in a spiral hook shape, and its hook body can wind around the tubular tissue to be ligated for at least one week. A guide needle accommodation cavity is provided at the front part of the needle head. The catheter is provided with a guide needle outlet corresponding to the position of the guide needle accommodation cavity. The internal spaces of the catheter and the operating tube are connected. One end of the guide needle is arranged in the operating tube and is connected to a guide needle pushing mechanism also arranged in the operating tube. The other end of the guide needle is arranged in the catheter and a detachable connecting part is provided at the end. A suture thread is connected to the connecting part. The end of the guide needle provided with the connecting part can extend out from the guide needle outlet under the push of the guide needle pushing mechanism, and the connecting part is inserted into the guide needle accommodation cavity. The binding force between the guide needle and the connecting part is less than the binding force between the guide needle accommodation cavity and the connecting part.

[0005] As a preferred solution, the guide needle pushing mechanism includes a push block, a push rod, and a push handle connected in sequence. The push block is connected to the guide needle, and the push handle extends out from the rear opening of the operating tube. The push handle can push the push rod and move along the axial direction of the operating tube.

[0006] As a more preferred solution, the push rod is rotatably connected to the push block, and the push handle is fixedly connected to the push rod; the push rod can rotate around its central axis within the operation tube under the action of the push handle; a first stopper is arranged on the push rod, and a second stopper that does not partition the operation tube is arranged inside the operation tube, and the gap between the second stopper and the inner wall of the operation tube is larger than the first stopper; by rotating the push rod around its central axis and moving the push rod along the axial direction of the operation tube, the first stopper can be made to abut against the second stopper or pass through the gap between the second stopper and the inner wall of the operation tube.

[0007] As a more preferred solution, the push block is of a columnar structure, and a rubber layer is arranged on its side surface so that the push block fits closely against the inner wall of the operation tube.

[0008] As a preferred solution, a barbed tip is arranged at the front part of the connecting portion; an elastic piece is arranged on the inner wall of the needle accommodating cavity; the barbed tip can penetrate into the needle accommodating cavity and be stuck on the elastic piece.

[0009] As a more preferred solution, the rear part of the connecting portion is sleeved on the guide needle.

[0010] The beneficial technical effects of the present invention mainly lie in: providing a tubular tissue ligator with less pain for patients and less surgical trauma. The present invention can effectively and with less trauma perform the ligation of tubular tissues by means of the needle rotating and winding the tubular tissue, the suture line connecting to form a closed loop, rotating in the reverse direction to separate the needle and making the suture line wind around the tubular tissue, and tying and delivering the knot; the structure of the present invention is simple and easy to manufacture, and it can be applied to the ligation of human tubular tissues such as the great saphenous vein, fallopian tube, vas deferens, and even the intestine, with a wide range of applications; at the same time, compared with conventional equipment and means, the present invention has less surgical trauma, is more convenient to implement, causes less pain to patients, has a lower possibility of making mistakes, and also has less surgical risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention.

[0013] Figure 2 is a schematic position diagram (front view) of the needle of the present invention and the tubular tissue to be ligated during the operation.

[0014] Figure 3 is a schematic position diagram (top view) of the needle of the present invention and the tubular tissue to be ligated during the operation.

[0015] Figure 4 is a schematic structural diagram of the guide needle, the connecting portion and the needle accommodating cavity of the present invention.

[0016] In the figure: 1 is the needle, 11 is the hook body, 11a is the first part, 11b is the second part, 11c is the third part, 12 is the tip, 13 is the guide needle receiving cavity, 131 is the elastic piece, 2 is the catheter, 21 is the guide needle outlet, 3 is the operating tube, 31 is the push block, 32 is the push rod, 33 is the push handle, 34 is the first stop block, 35 is the second stop block, 4 is the guide needle, 41 is the connecting part, 411 is the barbed tip, 5 is the suture thread, and 6 is the tubular tissue to be sutured. Detailed implementation mode

[0017] Now, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention. It should be noted that the words "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0018] As Figures 1-4 shown, a tubular tissue suture device includes a needle 1, a catheter 2, an operating tube 3 and a guide needle 4; wherein the needle 1, the catheter 2 and the operating tube 3 are connected in sequence from front to back (with the direction of the suture device entering the body as the front, the same below); both the catheter 2 and the operating tube 3 are tube bodies with a circular cross-section, and the internal spaces of the two are connected.

[0019] The needle 1 has a spiral hook-like structure and is composed of a hook body 11 and a tip 12, which are integrally formed; wherein the hook body 11 is sequentially provided with a first part 11a, a second part 11b and a third part 11c from front to back; the first part 11a is also connected to the tip 12, and the third part 11c is also connected to the front end of the catheter 2; the hook body 11 can be obtained by performing a first lateral bend on the third part 11c to form a certain angle with the catheter 2 laterally; then performing a second lateral bend on the second part 11b in the direction opposite to the bending direction of the third part 11c; and then performing a third lateral bend on the first part 11a in the direction opposite to the bending direction of the second part 11b; after the hook body 11 enters the human tissue, it can wind around the tubular tissue 6 to be sutured for one week through rotational operation; the setting of the tip 12 can cut some connective tissues of the human body during the surgical operation to facilitate the operation; a guide needle receiving cavity 13 is also provided at the front end of the hook body 11 behind the tip 12 of the needle; at the same time, a guide needle outlet 21 corresponding to the position of the guide needle receiving cavity 13 is provided at the front part of the catheter 2, so that after the hook body 11 winds around the tubular tissue 6 to be sutured for one week, the guide needle outlet 21 can be directly opposite to the guide needle receiving cavity 13 and is not blocked by the tubular tissue 6 to be sutured in the middle.

[0020] One end of the guide pin 4 is arranged in the operating tube 3 and is connected to a guide pin pushing mechanism also arranged in the operating tube 3; the guide pin pushing mechanism includes a push block 31, a push rod 32 and a push handle 33. Among them, the push block 31 is connected to the guide pin 4. The push block 31 is of a cylindrical structure, and a rubber layer is arranged on its side surface so that the push block 31 is closely attached to the inner wall of the operating tube 3; the push rod 32 is of a cylindrical structure, one end of which is connected to the push block 31 and the other end is connected to the push handle 33; the push handle 33 is also of a cylindrical structure, and the end not connected to the push rod 32 extends out from the rear opening of the operating tube 3, which can be used for the operator to perform pushing, pulling and rotating operations; the operator can push and pull the push handle 33 to make the push rod 32 move along the axial direction of the operating tube 3 in the operating tube 3, thereby driving the push block 31 to also move along the axial direction of the operating tube 3.

[0021] The other end of the guide pin 4 is arranged in the catheter 2 and a detachable connecting part 41 is arranged at the end. A suture 5 is connected to the connecting part 41 (the other end of the suture 5 passes through the catheter 2 and extends out from the front of the operating tube 3); when the operator pushes the push handle 33, through the transmission of the push rod 32 and the push block 31, one end of the guide pin 4 provided with the connecting part 41 can extend out from the guide pin outlet 21, and the connecting part 41 can be inserted into the guide pin receiving cavity 13; a barbed tip 411 is arranged at the front of the connecting part 41, and an elastic piece 131 is arranged on the inner wall of the guide pin receiving cavity 13; the barbed tip 411 can penetrate into the guide pin receiving cavity 13 and be stuck on the elastic piece 131; in addition, the rear part of the connecting part 41 is sleeved on the guide pin 4 in a conventional manner; the binding force between the guide pin 4 and the connecting part 41 is less than the binding force between the guide pin receiving cavity 13 and the connecting part 41 (that is, the binding force between the barbed tip 411 and the elastic piece 131). Therefore, when the guide pin 4 is inserted into the guide pin receiving cavity 13 and then withdrawn, the connecting part 41 is detached from the guide pin 4, and the connecting part 41 stays in the guide pin receiving cavity 13 with the suture 5.

[0022] In addition, it should be noted that: in the guide needle pushing mechanism, the connection method between the push handle 33 and the push rod 32 is: the end surface center of the push handle 33 is fixedly connected to the end surface center of the push rod 32; and the connection method between the push block 31 and the push rod 32 is: the end surface center of the push rod 32 is rotatably connected to the end surface center of the push block 31 through a connecting shaft or other conventional means; so that the operator can push and pull the push handle 33 to make the push rod 32 and the push block 31 move synchronously along the axial direction of the operating tube 3, and when the operator rotates the push handle 33 with the central axis of the push handle 33 as the rotating axis, the push rod 32 can rotate around its central axis, while the push block 31 does not rotate. At the same time, a first stopper 34 is arranged on the push rod 32, and a second stopper 35 which does not block the operating tube 3 is arranged on the inner wall of the operating tube 3, and the gap between the second stopper 35 and the inner wall of the operating tube 3 is larger than the first stopper 34; by rotating the push rod 32 around its central axis, the first stopper 34 can face the second stopper 35 or face the gap between the second stopper 35 and the inner wall of the operating tube 3; pushing and pulling the push rod 32 again can make the first stopper 34 and the second stopper 35 abut against each other or make the first stopper 34 pass through the gap between the second stopper 35 and the inner wall of the operating tube 3; this arrangement mainly constitutes a safety mechanism to prevent the operator from pushing the push handle 31 by mistake, causing the guide needle 4 to extend out of the catheter 2 at the wrong time.

[0023] During operation: the operator only needs to make a small hole to insert the suture device into the patient's body; the needle 1 is placed obliquely at the lower part of the tubular tissue 6 to be sutured, and the needle 1 is rotated and wrapped around the tubular tissue 6 to be sutured by rotating the suture device as a whole; then the push handle 33 is rotated to open the "safety mechanism" so that the first stopper 34 faces the gap between the second stopper 35 and the inner wall of the operating tube 3; then the push handle 33 is pushed to make the push block 31 move forward and push the guide needle 4 out of the guide needle outlet 21; when the connecting portion 41 is inserted into the guide needle accommodating cavity 13, the push handle 33 is operated to retract the guide needle 4; at this time, the connecting portion 41 is detached from the guide needle 4, and the connecting portion 41 with the suture thread 5 remains in the guide needle accommodating cavity 13; after completing this operation, the hook body 11 equivalent to the needle head 1 is wrapped around the tubular tissue 6 to be sutured, and the head and tail of the hook body 11 are connected by the suture thread 5, thereby forming a closed loop; then, the needle head 1 is rotated in the opposite direction and gradually detached from the tubular tissue 6 to be sutured by the overall reverse rotation of the suture device; during the process of rotation and detachment, the suture thread 5 is wrapped around the tubular tissue 6 to be sutured; then, the suture device is taken out of the human body, and the ends of the suture thread 5 are knotted, and the suture of the tubular tissue 6 to be sutured is completed by sending the knot.

[0024] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A tubular tissue ligator, characterized in that: it includes a needle, a catheter, an operating tube and a guide needle. The needle, the catheter and the operating tube are connected in sequence from front to back. The needle is in a spiral hook shape, and its hook body can wind around the tubular tissue to be ligated for at least one week. A guide needle receiving cavity is arranged at the front part of the needle. The catheter is provided with a guide needle outlet corresponding to the position of the guide needle receiving cavity. The internal spaces of the catheter and the operating tube are communicated. One end of the guide needle is arranged in the operating tube and is connected with a guide needle pushing mechanism also arranged in the operating tube. The other end of the guide needle is arranged in the catheter and a detachable connecting part is arranged at the end. A ligature thread is connected to the connecting part. The end of the guide needle provided with the connecting part can extend out of the guide needle outlet under the push of the guide needle pushing mechanism, and the connecting part is inserted into the guide needle receiving cavity. The binding force between the guide needle and the connecting part is less than the binding force between the guide needle receiving cavity and the connecting part.

2. The tubular tissue ligator according to claim 1, characterized in that: the guide needle pushing mechanism includes a push block, a push rod and a push handle which are connected in sequence. The push block is connected with the guide needle, and the push handle extends out from the rear opening of the operating tube. The push handle can push the push rod and move along the axial direction of the operating tube within the operating tube.

3. The tubular tissue ligator according to claim 2, characterized in that: the push rod is rotatably connected with the push block, and the push handle is fixedly connected with the push rod. The push rod can rotate around the central axis of the push rod within the operating tube under the action of the push handle. A first stop block is arranged on the push rod, and a second stop block that does not partition the operating tube is arranged inside the operating tube. The gap between the second stop block and the inner wall of the operating tube is larger than the first stop block. By rotating the push rod around its central axis and moving the push rod along the axial direction of the operating tube, the first stop block can be made to abut against the second stop block or pass through the gap between the second stop block and the inner wall of the operating tube.

4. The tubular tissue ligator according to claim 3, characterized in that: the push block is in a columnar structure, and a rubber layer is arranged on its side surface to make the push block closely fit with the inner wall of the operating tube.

5. The tubular tissue ligator according to claim 1, characterized in that: a barbed tip is arranged at the front part of the connecting part. Elastic pieces are arranged on the inner wall of the guide needle receiving cavity. The barbed tip can penetrate into the guide needle receiving cavity and be stuck on the elastic pieces.

6. The tubular tissue ligator according to claim 5, characterized in that: the rear part of the connecting part is sleeved on the guide needle.

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