CN110680465B - Semi-open and close type blade end for internal tissue excision - Google Patents

Abstract

The invention relates to a medical instrument, in particular to a semi-open type blade end for cutting internal tissues, which has an open state and a closed state, wherein when the blade end is in the closed state, a containing cavity is formed in the blade end, the containing cavity is communicated with the inner space of a catheter of an internal tissue cutter, the blade end also comprises a plurality of blades, and when the blade end is switched from the open state to the closed state, the blades scratch through tissues to be cut in a patient body to cut the tissues to be cut. The cutting edge end head directly avoids the risk that cut tissues remain in a patient body when the tissues are resected; in addition, the incision healing is facilitated, the subsequent operation is facilitated, and the operation quality is improved; on the other hand, the assistant cleaning step is saved, and the risk of infection in the patient is reduced; in addition, the excision process is fast, the efficiency is high, and the operation time is shortened.

Description

A half-opening blade tip for excision of internal tissue

technical field

The invention relates to a medical device, in particular to a half-opening and closing blade end used for cutting internal tissues.

Background technique

In the field of medical surgery technology, in vivo tissue resection is a common surgical method. By removing the diseased tissue, it prevents the further spread of the diseased tissue, so as to achieve the purpose of treatment. Minimally invasive surgery is increasingly widely used because of small surgical incisions, less pain during the operation, and faster recovery of patients.

In minimally invasive surgery, when tissue resection is involved, the current surgical method is to cut the tissue with a minimally invasive scalpel, surgical scissors, and a minimally invasive electric knife, and then separate the tissue from the body. Although this method is widely used , but in further research work, the inventor found that such a method still has shortcomings, specifically as follows:

With the current cutting surgical equipment, when tissue cutting is performed, the separation of the tissue is not completed in one cutting or shearing action, but multiple times of cutting or cutting are required to cut off the tissue that needs to be cut. In the process of cutting or cutting, tissue fragments are very likely to be formed. Although laparoscopy is assisted, the tissues in the body are complex, and there is usually blood or even interstitial fluid during the operation. Any blind spots still exist, so that these tissue fragments are likely to enter between the tissues or the mucous membrane between the tissues, and the follow-up cleaning work is extremely difficult, which greatly increases the difficulty of the operation and greatly prolongs the operation time, which is not conducive to The quality of the operation; more seriously, if the tissue fragments are left in the body, it will lead to early major medical accidents such as infection. Therefore, it is currently necessary to design an in vivo tissue resection device that can facilitate the collection and cleaning of tissue fragments and reduce the risk of remaining tissue fragments during tissue resection in vivo.

Contents of the invention

The purpose of the present invention is to provide a method that can facilitate the collection and cleaning of tissue fragments and reduce the risk of tissue fragments remaining in the prior art in view of the problems that tissue fragments are not easy to collect and have great residual risks in internal tissue resection surgery. In vivo tissue resection device.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A semi-openable blade end for internal tissue resection, the blade end has an open state and a closed state, and when the blade end is in the closed state, an accommodating cavity is formed in the blade end, The accommodating cavity communicates with the internal space of the catheter of the internal tissue cutter, and the blade end also includes several blades. When the blade end is switched from an open state to a closed state, the blades pass The tissue to be resected in the patient's body realizes the cutting of the tissue to be resected.

For the blade end of the present application, when performing tissue resection, the blade end is pushed to the tissue to be resected, so that the blade end is in an open state, and each blade is on the required resection and separation path, and then the The tip of the blade is switched from the open state to the closed state, and in this process, the tissue to be resected is resected. In this way, when the tissue is resected, the resected and separated tissue will naturally fall into the accommodation cavity in the tip of the blade, directly avoiding the risk of the resected tissue remaining in the patient's body; greatly reducing the surgical risk; moreover, For the incision of the same blade, the separation can be achieved by one cutting action, which avoids the risk of repeated cutting of a certain cutting place by conventional surgical scissors and other components to form small tissue fragments; further, it also makes the incision smooth, which is beneficial While the incision is healing, it is also beneficial to follow-up hemostatic clip clamping, tissue suturing and other surgical operations, improving the quality of the operation; The lower tissue is relatively large, and the current conventional surgical scissors can be used to penetrate into the accommodation cavity to fragment the excised tissue. The fragmentation process is carried out in the closed blade end accommodation cavity, first of all, it avoids the impact of the fragmentation process on the tissue. Damage to surrounding normal tissues further improves the quality of surgery, and also reduces or avoids the inflow of interstitial fluid or blood into the patient's body, saves the cleaning steps of assistants, and reduces the risk of infection in the patient's body;

Furthermore, when the cut tissue is a tissue with a relatively independent shape such as cysts and polyps, the tip of the blade completely covers the cut tissue to achieve rapid overall resection and removal; when the cut tissue is large in size , The operation can be carried out in a step-by-step resection method, and each resection process is fast and efficient, which is beneficial to shorten the operation time.

As a preferred technical solution, the end of the blade includes several blades, the blades are sheet-like structures that bulge outward, and the blades are arranged on the blades. The blade bulges outwards to form the accommodating cavity inside the blade, and the sheet structure is adopted to make the weight of the end of the blade lighter, which further facilitates the control of the end of the blade.

As a preferred technical solution, the blades are uniformly distributed in the circumferential direction. During the opening process of each blade, good consistency can be ensured, which is beneficial for the operator to grasp and predict the position of the blade.

As a preferred technical solution, when the ends of the blades are in an open state, the blades are separated from each other, and when the ends of the blades are in a closed state, the blades are connected to form the accommodating cavity.

As a preferred technical solution, when the end of the blade is in a closed state, the blade is surrounded by a spherical structure or a spherical crown structure, and the accommodating cavity is located inside the spherical structure or spherical crown structure.

As another preferred technical solution, when the end of the blade is in a closed state, the blade is surrounded by an ellipsoidal structure or an ellipsoidal crown structure, and the accommodating cavity is located inside the ellipsoidal structure or the ellipsoidal crown structure .

In the above scheme, a spherical structure or a spherical crown structure or an ellipsoidal structure or an ellipsoidal crown structure is formed, and its external structure is smooth, which avoids scratching the surrounding tissue during the entry of the blade end, and can also facilitate the opening of the blade end. The tissue on the surface further facilitates the operation and simplifies the operation steps.

As another preferred technical solution, when the end of the blade is in a closed state, the blade encloses a cone-shaped structure or a truncated cone-shaped structure, and the accommodating cavity is located inside the cone-shaped structure or the truncated cone-shaped structure . The blade is surrounded by a cone-shaped structure or a truncated cone-shaped structure. Because of its edge structure, it is convenient for the surgeon to reliably grasp the shape of the blade end, avoiding the twisting of the blade end during the operation and pulling the tissue, causing tissue damage. Moreover, the blade The end edge can also be used as a position reference.

As a preferred technical solution, the tapered structure at the end of the blade is conical or pyramidal, and the frustum-shaped structure at the end of the blade is followed by a truncated-conical structure or a truncated-pyramidal structure.

As a preferred technical solution, the outer wall of the end of the blade facing the tissue to be resected is arc-shaped. The arc shape here is to round the outer wall of the end, so that the outer end surface of the blade end is a smooth transition structure, which is beneficial for the blade end to enter the tissue to be resected, and avoids scratching the patient during the entry process other tissues in the body. By means of this scheme, the risk of scratching other tissues in the patient's body by the tip of the blade is further reduced, and it is further convenient for the tip of the blade to stretch the tissue in the patient's body to reach the affected area.

As a preferred technical solution, the end of the blade is divided along the direction of the generatrix to form each of the blades.

As a preferred technical solution, the blade is provided with a blade along the direction of the generatrix of the blade end on the sides of the blade along the generatrix of the blade end.

Through the above method, the blade is switched towards the closed state, and the cutting action is that the end of the blade is closed in a linear state where the blade is gradually approaching, ensuring a smooth and linear tissue cutting process, which is convenient for the surgeon to control the state of the operation process.

As another preferred technical solution, the blade is along the side of the generatrix at the end of the blade, wherein one side is a blade edge, and the other side plate is a retaining edge, and the blade edge is provided with a For the cutting edge in the direction of the generatrix of the terminal, the rib is a flat side, and the edge of the blade is opposite to the rib of the adjacent blade. In this way, the cutting of the tissue is realized through the cooperation between the blade and the side of the connected blade, avoiding the misalignment of the blade when facing each other, and ensuring a good airtight effect at the end of the blade.

As a further preferred solution, the ribs are provided with grooves for matching with the corresponding blades, and when the ends of the blades are in a closed state, the blades are located in the corresponding grooves . The setting of the groove further improves the cutting action of the blade, and further ensures the airtight effect of the end of the blade.

As a further preferred solution, the groove is a V-shaped groove. When the blade slides along the side wall of the V-shaped groove, the effect of cutting and separation can be realized more reliably, which further ensures the smoothness of the incision and improves the quality of operation.

As a preferred technical solution, a ring-shaped knife seat is also provided at the lower end of the blade, and the knife seat is made of flexible silicone material, and the lower ends of each of the blades are embedded in the knife seat. The arrangement of the knife seat ensures that the ends of the knife edges formed by each knife edge have good integrity, and at the same time, it is beneficial to form a reliable sealing fit with other structures.

The present application also discloses a cutter using the above-mentioned blade tip,

A resectator for internal tissue resection, comprising the above-mentioned half-opening blade end.

As a preferred technical solution, the resectator also includes a catheter, one end of the catheter is an insertion end used to extend into the patient's body, and the other end is an operating end located outside the patient's body, and the insertion end is provided with The blade end, the cutter also includes an operating part for driving the blade end to switch between the open state and the closed state, one end of the operating part is arranged at the operating end of the catheter, and the other end is connected to the match the tip of the blade.

The resectator of the present application can be used independently during the tissue resection operation, and can also be used in conjunction with the current conventional laparoscopic camera system. The surgical operation is performed with the assistance of the laparoscopic camera system. During the operation, the catheter is cut through the patient's abdominal wall The channel at the opening enters the patient's body, and the tip of the blade is pushed to the tissue to be resected by the catheter. The catheter is a hollow catheter with open ends. The catheter is made of medical silicone material or hospital rubber material. The material and mechanics of the catheter The performance can be the same as that of the current conventional laparoscopic catheter, and it can be used to enter the patient's body, and it also has certain strength and deformation ability. For example, it is made of the current conventional endoscopic catheter material. The end of the blade, so that the end of the blade is in an open state, and then adjust the position and angle of the end of the blade through the catheter, so that each blade is on the required cutting and separation path, and then control the end of the blade through the operating end of the operating part head, so that the tip of the blade is switched from the open state to the closed state, and in this process, the resection of the tissue to be resected is realized. Due to the use of the above-mentioned blade tip, the risk of resected tissue remaining in the patient's body is directly avoided when the tissue is resected; the operation risk is greatly reduced; moreover, it is beneficial to the healing of the incision, and it is also beneficial to the subsequent application of the hemostatic clip, Surgical operations such as tissue suture improve the quality of the operation; on the other hand, it also saves the cleaning steps of assistants and reduces the risk of infection in the patient's body; moreover, the excision process is fast and efficient, which is conducive to shortening the operation time.

As a preferred technical solution, a first film sleeve is also sealed and connected between the knife seat and the outer wall of the operating part, and a second film sleeve is also sealed and connected between the operating part and the conduit.

The first film cover and the second film cover are made of medical resin film, and the two ends thereof are open hollow cover-like structures, which have good sealing effect and deformation ability. Through the first film cover and the second film cover, a well-sealed channel is formed between the tip of the blade and the catheter, further preventing the outflow of interstitial fluid and blood of the resected tissue, and preventing tissue fragments from falling into the patient's body.

As a preferred technical solution, a hanging lug is fixedly connected to the blade, a connecting rod is connected to the middle or middle and lower pin of the hanging lug, and the other end of the connecting rod is connected to the guide pin, The operation part includes a push rod and a push part connected with the push rod, the push part is connected with the pin shaft at the lower end of the hanging ear, and when the push rod pushes the push part to move toward the end of the blade, , the end of the blade gradually opens, and when the push rod pulls the pushing member to move in a direction away from the end of the blade, the end of the blade gradually closes.

As a preferred technical solution, the hanging lug is in the shape of an arc bulging outward.

As a preferred technical solution, several notches are provided on the pushing member. A gap is provided on the pushing part, and other surgical instruments, such as minimally invasive surgical scissors and a minimally invasive camera system, can enter the interior of the accommodating cavity through the catheter to perform surgical auxiliary work, further improving the convenience and safety of the operation.

As another preferred technical solution, the pushing member is a ring structure. The ring structure is adopted, so that there is a large space on the pushing part, which further facilitates the operation.

As a preferred technical solution, the push rod is a deformable elongated rod structure. The strength of the push rod ensures that the pushing part can be pushed forward smoothly, and the push rod also has a certain degree of elasticity, which ensures that it can provide enough bending deformation to push the end of the blade to the tissue part to be resected.

As a preferred technical solution, a guide plate is also provided in the operating end of the catheter, and several through holes are provided on the guide plate, wherein the inner wall of one of the through holes is in a sliding fit with the push rod. Through the setting of the guide plate, the push rod at the operating end is supported to reduce the interference between the push rod and other equipment.

As a preferred technical solution, the position and shape of at least one through hole on the guide plate corresponds to the notch on the pushing component. Such setting further facilitates the entry of surgical equipment.

As a preferred technical solution, the resectator further includes a sleeve, and the inner wall of the sleeve is in clearance fit with the catheter and the blade end in a closed state. The sleeve is made of medical silicone material. During the operation, the catheter and the end of the blade are set in the sleeve, and together with the sleeve, enter the affected area through the incision of the patient's abdominal wall, and then push the end of the blade through the catheter to the tissue to be resected, and then through the push rod Control the resection action of the tip of the blade. When the resection is completed, or multiple resections are required, or a single resection is completed, use other surgical equipment to clean the excised tissue in the tip of the blade out of the body, or keep the sleeve still. Pull the catheter out from the cannula to the outside of the body, and after cleaning the tissue in the cavity at the end of the blade, extend the cannula into the affected area for the next layer of cutting; after the entire tissue to be resected is resected, the catheter and the end of the blade Take it out, and then use other surgical instruments to perform subsequent operations, and finally take out the cannula.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

For the blade end of the present application, when performing tissue resection, the blade end is pushed to the tissue to be resected, so that the blade end is in an open state, and each blade is on the required resection and separation path, and then the The tip of the blade is switched from the open state to the closed state, and in this process, the tissue to be resected is resected. In this way, when the tissue is resected, the resected and separated tissue will naturally fall into the accommodation cavity in the tip of the blade, directly avoiding the risk of the resected tissue remaining in the patient's body; greatly reducing the surgical risk; moreover, For the incision of the same blade, the separation can be achieved by one cutting action, which avoids the risk of repeated cutting of a certain cutting place by conventional surgical scissors and other components to form small tissue fragments; further, it also makes the incision smooth, which is beneficial While the incision is healing, it is also beneficial to follow-up hemostatic clip clamping, tissue suturing and other surgical operations, improving the quality of the operation; The lower tissue is relatively large, and the current conventional surgical scissors can be used to penetrate into the accommodation cavity to fragment the excised tissue. The fragmentation process is carried out in the closed blade end accommodation cavity, first of all, it avoids the impact of the fragmentation process on the tissue. Damage to surrounding normal tissues further improves the quality of surgery, and also reduces or avoids the inflow of interstitial fluid or blood into the patient's body, saves the cleaning steps of assistants, and reduces the risk of infection in the patient's body;

Furthermore, when the cut tissue is a tissue with a relatively independent shape such as cysts and polyps, the tip of the blade completely covers the cut tissue to achieve rapid overall resection and removal; when the cut tissue is large in size , the operation can be carried out in a step-by-step manner, and each resection process is fast and efficient, which is beneficial to shorten the operation time;

The resectator of the present application, when performing tissue resection, directly avoids the risk of the resected tissue remaining in the patient's body; greatly reduces the risk of surgery; moreover, it is beneficial to the healing of the incision, and it is also beneficial to the subsequent application of hemostatic clips, tissue suturing, etc. Surgical operation improves the quality of the operation; on the other hand, it also saves the cleaning steps of the assistant and reduces the risk of infection in the patient; moreover, the excision process is fast and efficient, which is beneficial to shorten the operation time.

Description of drawings

Fig. 1 is a schematic structural view of one of the embodiments of the resectator;

Fig. 2 is the schematic diagram of the structure after removing the drop film cover, the second film cover and the sleeve pipe from the end of the blade;

Fig. 3 is a schematic diagram of the split structure of Fig. 2;

Markings in the figure: 1-blade end, 2-blade, 3-blade, 4-guide, 5-groove, 6-knife seat, 7-first film cover, 8-second film cover, 9-pushing part , 10-hanging ear, 11-notch, 12-guide plate, 13-through hole, 14-sleeve, 15-push rod, 16-connecting rod.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in detail.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment 1, as shown in Figure 1-3,

A semi-openable blade end for internal tissue resection, the blade end has an open state and a closed state, when the blade end is in the closed state, an accommodation cavity is formed in the blade end 1 , the accommodating cavity communicates with the inner space of the catheter 4 of the internal tissue cutter, and the blade end 1 also includes several blades 3, when the blade end 1 is switched from an open state to a closed state, The blade 3 passes through the tissue to be resected in the patient's body to realize the cutting of the tissue to be resected.

For the blade end 1 of this embodiment, when tissue resection is performed, the blade end 1 is pushed to the tissue to be resected, so that the blade end 1 is in an open state, and each blade 3 is in the required cutting and separation position. On the path, the blade tip 1 is then switched from the open state to the closed state, and in this process, the resection of the tissue to be resected is realized. In this way, when the tissue is resected, the resected and separated tissue naturally falls into the accommodation cavity in the blade end 1, directly avoiding the risk of the resected tissue remaining in the patient's body; greatly reducing the surgical risk; and , for the 3 incisions of the same blade, the separation can be achieved by one cutting action, which avoids the risk of repeated cutting of a certain cutting place by conventional surgical scissors and other components to form small tissue fragments; further, it also makes the incision smooth, While facilitating incision healing, it is also beneficial to follow-up hemostatic clip clamping, tissue suturing and other surgical operations, improving the quality of surgery; on the other hand, when the tissue of the blade 3 is cut off and falls into the accommodation cavity, the blade end 1 is in a closed state at this time If the excised tissue is relatively large, conventional surgical scissors can be used to penetrate into the accommodation chamber to fragment the excised tissue. The fragmentation process is carried out in the accommodation chamber of the closed blade end 1. It avoids damage to surrounding normal tissues during the fragmentation process, further improves the quality of surgery, and also reduces or avoids the inflow of interstitial fluid or blood into the patient's body, saves the cleaning steps of assistants, and reduces the risk of infection in the patient's body;

Furthermore, when the tissue to be cut is a tissue with a relatively independent shape such as cysts and polyps, the blade end 1 completely covers the tissue to be cut, so as to realize rapid resection and removal of the whole; when the tissue to be cut is large in size When the operation can be performed step by step, each resection process is fast and efficient, which is conducive to shortening the operation time.

As a preferred embodiment, the blade end 1 includes several blades 2 , the blades 2 are sheet-like structures that bulge outward, and the blades 3 are arranged on the blades 2 . The outward bulging of the blade 2 forms the accommodating cavity inside the blade 2 , and adopts a sheet structure, which makes the blade end 1 lighter in weight and further facilitates the control of the blade end 1 .

As a preferred embodiment, the blades 3 are evenly distributed in the circumferential direction. During the opening process of each blade 3 , good consistency can be ensured, which is beneficial for the surgeon to grasp and predict the position of the blade 3 .

As a preferred embodiment, when the blade end 1 is in an open state, each of the blades 2 is spaced apart; when the blade end 1 is in a closed state, each blade 2 is connected to form the accommodating cavity.

As a preferred embodiment, when the blade end 1 is in a closed state, the blade 2 is surrounded by a spherical structure or a spherical crown structure, and the accommodating cavity is located inside the spherical structure or spherical crown structure.

As another preferred embodiment, when the blade end 1 is in a closed state, the blade 2 is surrounded by an ellipsoidal structure or an ellipsoidal crown structure, and the accommodating cavity is located in the ellipsoidal structure or ellipsoidal crown structure. internal.

In the above scheme, a spherical structure or a spherical crown structure or an ellipsoidal structure or an ellipsoidal crown structure is formed, and its external structure is smooth, which prevents the blade end 1 from scratching the surrounding tissue during the entry process, and can also facilitate the blade end 1 to be stretched. Access to tissues on the path further facilitates surgical operations and simplifies surgical steps.

As another preferred embodiment, when the blade end 1 is in a closed state, the blade 2 is surrounded by a conical structure or a frustum-shaped structure, and the accommodating cavity is located in the conical structure or a frustum-shaped structure. internal. The blade 2 is surrounded by a cone-shaped structure or a truncated cone-shaped structure. Because of its edge structure, it is convenient for the surgeon to reliably grasp the shape of the blade end 1, so as to avoid pulling the tissue due to the twisting of the blade end 1 during the operation, causing tissue damage. Moreover, the edge of the blade tip 1 can also be used as a position reference.

As a preferred embodiment, the tapered structure of the blade end 1 is conical or pyramidal, and the frustum-shaped structure of the blade end 1 is followed by a truncated-conical structure or a truncated-pyramidal structure.

As a preferred embodiment, the outer wall of the blade end 1 facing the tissue to be resected is arc-shaped. The arc shape here is that the outer wall of the end is rounded, so that the outer end surface of the blade end 1 is a smooth transition structure, which is beneficial for the blade end 1 to enter the tissue to be resected, and avoids scratches during the entry process. Other tissues in the injured patient's body. By means of this scheme, the risk of scratching other tissues in the patient's body by the blade end 1 is further reduced, and it is further convenient for the blade end 1 to stretch the tissues in the patient's body to reach the affected area.

As a preferred embodiment, the blade end 1 is divided along the direction of the generatrix to form each of the blades 2 .

As a preferred embodiment, the blade 2 is provided with a blade 3 along the generatrix of the blade end 1 on the side of the blade 2 along the generatrix of the blade end 1 .

Through the above method, the blade 2 is switched towards the closed state, and when the cutting action is performed, the blade end 1 is closed into a linear state in which the blade 3 gradually approaches, ensuring the smooth linearity of the tissue cutting process, and making it convenient for the surgeon to control the state of the surgical process. .

As another preferred embodiment, the blade 2 is along the sides of the generatrix of the blade end 1, wherein one side is a blade edge, and the other side plate is a retaining edge, and the blade edge is provided with a Referring to the blade 3 in the direction of the generatrix of the blade end 1, the rib is a flat side surface, and the edge of the blade 2 is opposite to the rib of the adjacent blade 2 . In this way, the cutting of the tissue is realized through the cooperation between the blade 3 and the side of the connected blade 2 , avoiding the misalignment of the blade 3 when facing the blade 3 , and ensuring a good airtight effect of the blade end 1 .

As a further preferred solution, grooves 5 for matching with respective corresponding blades 3 are provided on the ribs, and when the blade ends 1 are in a closed state, the blades 3 are located at the respective corresponding blades. inside the groove 5. The setting of the groove 5 further improves the cutting action of the blade 3 and further ensures the sealing effect of the blade end 1 .

As a further preferred solution, the groove 5 is a V-shaped groove 5 . When the blade 3 slides along the side wall of the V-shaped groove, the effect of cutting and separating can be realized more reliably, and the smoothness of the incision can be further ensured to improve the quality of operation.

As a preferred embodiment, an annular knife seat 6 is also provided at the lower end of the blade 3, and the knife seat 6 is made of flexible silicone material, and the lower ends of each blade 2 are embedded in the knife seat 6 . The setting of the knife seat 6 makes the knife edge end 1 formed by each knife edge 3 have good integrity, and at the same time, it is beneficial to form a reliable sealing fit with other structures.

Embodiment 2, as shown in Figure 1-3,

A resectator for internal tissue resection, comprising the semi-openable blade end 1 described in any one of the implementations of Example 1, and also includes a catheter 4, one end of which is used to extend into the patient's body The protruding end, the other end is the operating end located outside the body of the patient, a blade end 1 is arranged on the protruding end, and the cutter also includes a device for driving the blade end 1 in the open state and the closed state An operating part for switching between, one end of the operating part is set at the operating end of the conduit 4 , and the other end is matched with the blade end 1 .

The resectator of this embodiment can be used independently when performing tissue resection surgery, and can also be used in conjunction with the current conventional laparoscopic camera system. The surgical operation is performed under the assistance of the laparoscopic camera system. During the operation, the catheter 4 is used by the patient. The opening channel at the incision of the abdominal wall enters the patient's body, and the blade tip 1 is pushed to the tissue to be resected by the catheter 4. The catheter 4 is a hollow catheter 4 with both ends open, and the catheter 4 is made of medical silicone material or hospital rubber material. Therefore, the material and mechanical properties of the catheter 4 can be the same as the current conventional laparoscopic catheter 4, can be used to enter the patient's body, and also have a certain strength and deformability, for example, it can be made of the current conventional endoscopic catheter 4 material , the surgeon controls the blade end 1 through the operating end of the operating part, so that the blade end 1 is in an open state, and then adjusts the position and angle of the blade end 1 through the catheter 4, so that each blade 3 is in the desired cutting position. On the separation path, the blade tip 1 is controlled by the operating end of the operating component, so that the blade tip 1 is switched from an open state to a closed state. In this process, the tissue to be resected is resected. Because the blade end 1 mentioned above is used, the risk of the excised tissue remaining in the patient's body is directly avoided when the tissue is resected; the risk of the operation is greatly reduced; moreover, it is conducive to the healing of the incision and the application of the subsequent hemostatic clip , tissue suture and other surgical operations to improve the quality of surgery; on the other hand, it also saves the cleaning steps of assistants and reduces the risk of infection in the patient's body; moreover, the excision process is fast and efficient, which is conducive to shortening the operation time.

As a preferred embodiment, a first film sleeve 7 is also sealed between the knife seat 6 and the outer wall of the operating part, and a second film is also sealed between the operating part and the conduit 4 Set of 8.

The first film cover 7 and the second film cover 8 are made of medical resin film, both ends of which are open hollow cover-like structures, which have good sealing effect and deformation ability. Through the first film cover 7 and the second film cover 8, a well-sealed channel is formed between the blade end 1 and the catheter 4, further avoiding the outflow of interstitial fluid and blood of the resected tissue, and preventing tissue fragments from falling in inside the patient.

As a preferred embodiment, a hanging lug 10 is fixedly connected to the blade 2, and a connecting rod 16 is connected to the middle or middle and lower part of the hanging lug 10, and the other end of the connecting rod 16 is connected to the The conduit 4 is pin-connected, the operating part includes a push rod 15 and a push part 9 connected with the push rod 15, the push part 9 is pin-connected with the lower end of the hanging ear 10, and the push rod 15 pushes When the pushing member 9 moves toward the blade end 1, the blade end 1 gradually opens, and when the push rod pulls the pushing member 9 to move away from the blade end 1, the The blade end 1 is gradually closed.

As a preferred embodiment, the hanging lug 10 is in the shape of an arc bulging outward.

As a preferred embodiment, several notches 11 are provided on the pushing member 9 . A notch 11 is provided on the pushing part 9, and other surgical instruments, such as minimally invasive surgical scissors and a minimally invasive camera system, can enter the interior of the accommodating cavity through the catheter 4 to perform surgical auxiliary work, further improving the convenience and safety of the operation.

As another preferred embodiment, the pushing member 9 is a ring structure. The ring structure is adopted, so that there is a larger space on the pushing part 9, which further facilitates the operation.

As a preferred embodiment, the push rod 15 is a deformable elongated rod structure. The strength of the push rod 15 ensures that the pushing member 9 can be pushed forward smoothly, and the push rod 15 also has a certain degree of elasticity, which ensures that it can provide sufficient bending deformation to push the blade tip 1 to the tissue to be resected.

As a preferred embodiment, a guide plate 12 is also provided in the operating end of the guide tube 4, and a plurality of through holes 13 are provided on the guide plate 12, and the inner wall of one of the through holes 13 is connected to the push rod 15. There is a sliding fit between them. Through the setting of the guide plate 12, the push rod 15 at the operating end is supported, and the interference between the push rod 15 and other equipment is reduced.

As a preferred embodiment, the position and shape of the through hole 13 on the guide plate 12 correspond to the notch 11 on the pushing member 9 . Such setting further facilitates the entry of surgical equipment.

As a preferred embodiment, the resectator further includes a sleeve 14 , and the inner wall of the sleeve 14 is in clearance fit with the catheter 4 and the blade end 1 in the closed state. The sleeve 14 is made of medical silicone material. During the operation, the catheter 4 and the blade end 1 are set in the sleeve 14, and together with the sleeve 14, they enter the affected area through the patient's abdominal wall incision, and then push the blade end 1 to the waiting area through the catheter 4. At the place where the tissue is resected, the resection action of the blade end 1 is controlled by the push rod 15. When the resection is completed, or when multiple resections are required, or a single resection is completed, other surgical equipment is used to remove the cut tissue in the blade end 1. Clean it out of the body, or keep the sleeve 14 still, pull the catheter 4 out of the sleeve 14 to the outside of the body, and then extend the sleeve 14 into the affected area after cleaning the tissue in the cavity of the blade end 1 for the next layer Cutting: After the entire tissue to be resected is resected, the catheter 4 and the blade end 1 are taken out, and then other surgical instruments are used to perform subsequent operations, and finally the cannula 14 is taken out.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (7)

1. A resectator for internal tissue resection, characterized in that: it comprises a half-openable blade end for internal tissue resection, the blade end has an open state and a closed state, and the blade end has an open state and a closed state. When the end is in a closed state, an accommodating cavity is formed in the blade end, and the accommodating cavity communicates with the inner space of the catheter of the internal tissue cutter, and the blade end also includes several blades. When the tip of the blade is switched from the open state to the closed state, the blade cuts across the tissue to be resected in the patient's body to realize the cutting of the tissue to be resected; The end of the blade includes several blades, the blades are sheet-like structures that bulge outward, and the blades are arranged on the blades; An annular knife seat is also provided at the lower end of the blade, The cutter for internal tissue resection also includes a catheter, one end of the catheter is an insertion end used to extend into the patient's body, and the other end is an operation end located outside the patient's body, and the insertion end is provided with There is a blade end, and the cutter also includes an operating part for driving the blade end to switch between the open state and the closed state. One end of the operating part is arranged at the operating end of the catheter, and the other end is connected to the The end of the blade is matched, and a first film sleeve is also sealed and connected between the knife seat and the outer wall of the operating part, and a second film sleeve is also sealed and connected between the operating part and the conduit , a hanging lug is fixedly connected to the blade, a connecting rod is connected to the middle or middle and lower part of the hanging lug, and the other end of the connecting rod is connected to the guide pin, and the operating part includes A push rod and a push part connected with the push rod, the push part is connected with the pin shaft at the lower end of the hanging ear, and when the push rod pushes the push part to move toward the end of the blade, the end of the blade The head is gradually opened, and when the push rod pulls the pushing part to move away from the end of the blade, the end of the blade is gradually closed, and the lug is in the shape of an arc bulging outward. A number of notches are provided on the pushing part, and a guide plate is provided in the operation end of the catheter, and a number of through holes are arranged on the guide plate, wherein a slide is provided between the inner wall of one of the through holes and the push rod. Cooperate, the position and shape of at least one through hole on the guide plate correspond to the notch on the pushing part, so as to facilitate the entry of surgical equipment. The conduit and the blade end in the closed state are clearance fit. 2 . The resectator for internal tissue resection according to claim 1 , wherein the blades are evenly distributed in the circumferential direction. 3 . 3. The resectator for internal tissue resection according to claim 2, characterized in that: when the ends of the blades are in an open state, each of the blades is spaced apart, and the ends of the blades are closed In the state, each blade is connected to form the accommodating cavity. 4. The resectator for internal tissue resection according to claim 3, characterized in that: when the tip of the blade is in a closed state, the blade is surrounded by a spherical structure or a spherical crown structure, and the accommodating cavity is located at the the interior of the spherical structure or spherical crown structure; Or, when the end of the blade is in a closed state, the blade is surrounded by an ellipsoidal structure or an ellipsoidal crown structure, and the accommodating cavity is located inside the ellipsoidal structure or the ellipsoidal crown structure; Alternatively, when the end of the blade is in a closed state, the blade encloses a conical structure or a truncated cone structure, and the accommodating cavity is located inside the conical structure or the truncated cone structure. 5 . The resectator for internal tissue resection according to claim 4 , characterized in that: the tip of the blade is divided along the direction of the generatrix to form each of the blades. 6 . 6 . The resectator for internal tissue resection according to claim 5 , wherein the blade is provided with a cutting edge along the generatrix of the blade end on the sides of the blade along the generatrix of the blade end. 6 . 7. The resectator for internal tissue resection according to claim 6, characterized in that: the blade is along the side of the generatrix of the blade end, wherein one side is a blade edge, and the other side plate is a stopper Edge, the edge is provided with a blade along the direction of the generatrix of the blade end, the edge is a flat side, the edge of the blade is opposite to the edge of the adjacent blade, on the edge There are grooves for cooperating with the corresponding blades. When the ends of the blades are closed, the blades are located in the corresponding grooves. The grooves are V-shaped grooves. The knife seat is made of flexible silicone material, and the lower end of each blade is embedded in the knife seat.