Plasma tissue dissociation knife

Abstract

The invention discloses a plasma tissue dissociation knife, and relates to the technical field of medical instruments. In order to solve the problems that when an existing endoscopic surgery relates to a plurality of instruments, the instruments need to be frequently switched for surgical operation, and the surgical efficiency is reduced, the following technical scheme is provided: the endoscopic surgical instrument comprises a tool bit, a tool bar, a handle and a cable which are connected in sequence; the cutter head comprises a blade telescopic assembly arranged on the head portion, an endoscope guide tube and a cutter head telescopic control mechanism are arranged in the handle, and the cutter head telescopic control mechanism drives a blade in the blade telescopic assembly to stretch out and draw back through a transmission piece. The positive cable extends to the tool bit to be connected with the blade telescopic assembly, the negative steel pipe is connected with the negative cable, and double-frequency emitter cutting is formed at the blade; the suction channel arranged in the cutter bar is used for flushing the surgical field and sucking turbid liquid in the operation. Compared with a traditional cold instrument, cutting efficiency, bleeding amount control, clear surgical field, cutter bar size optimization, cutting flexibility, sealing performance, operation convenience and the like are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a plasma tissue dissociation knife. Background Art

[0002] Endoscopic surgery is a minimally invasive surgical procedure performed through a small incision or natural body opening. Endoscopic surgery typically involves the use of specialized equipment and remotely controlled instruments, with indirect visualization of the surgical field through an endoscope or similar device. Endoscopic surgery may be less invasive than open surgery, as well as shorten hospital stays.

[0003] Carpal tunnel syndrome is an entrapment median neuropathy caused by compression of the median nerve at the wrist in the carpal tunnel. Symptoms of carpal tunnel syndrome include tingling, numbness, weakness, or pain in the fingers or hand innervated by the median nerve. Repetitive tasks, forces, posture, and vibration have been implicated as causative or contributing factors to carpal tunnel syndrome. Conservative treatments for carpal tunnel syndrome include direct corticosteroid injections, splints, oral corticosteroids, and / or behavioral modification.

[0004] Typically, endoscopic surgery involves multiple instruments in multiple steps. To facilitate insertion of the cannula, the central lumen of the cannula must be filled with a device, such as an obturator. The obturator is then removed and an endoscope or arthroscope is inserted into the cannula for visualization. The endoscope is then withdrawn from the cannula and either a knife is advanced into the cannula to perform the dissection, or a specialized knife assembly is affixed to the endoscope and the knife / endoscope assembly is advanced into the cannula to perform the dissection.

[0005] Currently, there is still a lack of medical devices for efficient operations related to endoscopic carpal tunnel and other tissue release. Summary of the invention

[0006] The purpose of the present invention is to provide a plasma tissue dissociation knife to solve the problem that when existing endoscopic surgery involves multiple instruments, the instruments need to be frequently switched to perform the surgery, thereby reducing the efficiency of the surgery.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: A plasma tissue dissociation knife comprises: a knife head, a knife rod, a handle and a cable connected in sequence; the knife head comprises a blade telescopic assembly arranged at the head, the knife rod comprises a negative steel tube, a transmission member is arranged inside the negative steel tube, an endoscope guide tube and a knife head telescopic control mechanism are arranged inside the handle, and the knife head telescopic control mechanism drives the blade in the blade telescopic assembly to telescope through the transmission member; a positive cable is wrapped around the outer side of the endoscope guide tube, the positive cable extends to the knife head to connect the blade telescopic assembly, the negative steel tube is connected to the negative cable, and dual-frequency emitter cutting is formed at the blade telescopic assembly; a suction channel arranged in the knife rod is used for rinsing the surgical field through an infusion tube connected to the cable, and the suction channel is used for intraoperative turbid liquid suction through a negative pressure suction tube connected to the cable.

[0008] Preferably, the blade retractable assembly includes shaft one, the blade is rotatably connected to the transmission member through shaft one, and the blade is connected to the positive cable. A ceramic head is provided at the front end of the blade head, and a track one is provided in the ceramic head. Shaft one reciprocates in track one.

[0009] Preferably, the blade telescopic assembly also includes shaft two, track two is opened in the blade, shaft two passes through track two and is fixed on the ceramic head, and the blade moves back and forth along shaft two.

[0010] Preferably, the blade extension and retraction control mechanism includes a button, the lower end of the button is connected to a limit piece, a spring is provided in the limit piece, the spring sleeve is arranged on the outside of the negative steel tube, a seal is provided in the negative steel tube, the seal is fixed to the limit piece, and the seal is connected to the transmission piece.

[0011] Preferably, an outer sealing ring is provided outside the sealing member, and the negative electrode steel tube and the sealing member are sealed by the outer sealing ring.

[0012] Preferably, an inner sealing ring is provided between the sealing member and the endoscope guide tube, and the sealing member and the endoscope guide tube are sealed by the inner sealing ring.

[0013] Preferably, the cable includes a water pipe and an electric cable, and the end of the water pipe is divided into two by a three-way interface, which are respectively connected to the negative pressure suction tube and the perfusion tube.

[0014] Preferably, a liquid inlet and outlet is provided at the front end of the spring, and the liquid inlet and outlet are connected to the water pipe.

[0015] The present invention has the following beneficial effects: Efficient cutting and low bleeding: The bipolar radio frequency design makes the cutting process faster and more accurate. The dual-frequency radio frequency cutting technology effectively reduces the amount of bleeding during the operation, reduces the surgical risk, and improves the safety of the operation.

[0016] Clear surgical field and convenient cleaning: The design of the same channel for instillation and suction not only simplifies the surgical process, but also significantly improves the cleaning and clearness of the surgical field. This design allows blood and tissue fragments to be immediately washed away during surgery, keeping the surgical field clear, thereby improving surgical efficiency and quality.

[0017] Optimized blade size: The common channel design also effectively reduces the overall size of the blade, making the device more compact and lightweight. This not only facilitates the doctor's operation during surgery, but also reduces the invasiveness of the surgery to the patient's body and improves the patient's comfort.

[0018] High efficiency of dual-frequency emitter cutting: By forming dual-frequency emitter cutting at the blade telescopic assembly, efficient and precise cutting effects are achieved. This technology provides more stable and uniform cutting energy, reduces thermal damage, and further improves surgical accuracy and safety.

[0019] Flexibility of the blade retractable assembly: The blade is connected to the transmission member through a rotating shaft and reciprocates in the track, providing flexible cutting capabilities. This design makes surgical operations more delicate and can adapt to tissues of different shapes and sizes.

[0020] Improved sealing performance: The setting of the outer sealing ring and the inner sealing ring effectively improves the sealing performance of the equipment. This prevents the leakage of liquid or gas, protects the internal electronic components, and ensures the long-term stable operation of the equipment.

[0021] Convenience of operation: The blade retraction control mechanism simplifies the doctor's operation process through the design of buttons and limiters. At the same time, the cable design also takes into account the convenience of use, reducing the complexity of the cable and the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the plasma tissue dissociation knife of the present invention; Figure 2 is an inner cross-sectional view of the handle of the present invention; Figure 3 It is a cross-sectional view of the cutter head telescopic control mechanism of the present invention; Figure 4 is a cross-sectional view of a cutter head of the present invention; Figures 1 to 4 The reference numerals shown in the figure respectively represent: a cutter head 1, a blade 11, a ceramic head 12, a cutter groove 121, an axis 13, an axis 2 14, a track 1 15, a track 2 16, a cutter rod 2, a transmission member 21, a suction channel 22, a suction channel opening 23, a handle 3, a handle housing 31, an endoscope guide tube 32, a cutter head telescopic control mechanism 33, a positive cable 34, a negative cable 35, a liquid inlet and outlet 36, a button 331, a limit member 332, a spring 333, a seal 334, a negative steel pipe 335, an outer sealing ring 336, an inner sealing ring 337, a cable 4, a water pipe 41, an electrical cable 42, a negative pressure suction tube 6, and an irrigation tube 5. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1 The present invention provides a plasma tissue dissociation knife, comprising a knife head 1, a knife rod 2, a handle 3 and a cable 4 connected in sequence; wherein the cable 4 comprises a water pipe 41 and an electric cable 42, and the end of the water pipe 41 is divided into two by a three-way interface, which are respectively connected to a negative pressure suction tube 6 and an irrigation tube 5.

[0025] Reference Figure 2 , including a handle shell 31, an endoscope guide tube 32 and a knife head telescopic control mechanism 33. The endoscope guide tube 32 serves as an insertion channel for the endoscope and passes through the entire handle 3 and the knife rod 2 to observe the field of view at the knife head 1.

[0026] Reference Figure 3 The mechanism is arranged at the connection position between the handle 3 and the knife rod 2, and includes a button 331, a limiter 332, a spring 333 and a seal 334; the lower end of the button 331 contacts the limiter 332, the limiter 332 is restricted to move in the limiter groove, a spring 333 is arranged in the limiter 332, the spring 333 is sleeved on the outside of the negative electrode steel tube 335, the seal 334 is arranged in the negative electrode steel tube 335, the seal 334 is fixed to the limiter 332, the pressing and restoring of the button 331 can drive the limiter 332 and the seal 334 to move synchronously, and the seal 334 is in the negative electrode The steel tube 335 is slidable. At the same time, an outer sealing ring 336 is arranged outside the sealing member 334 to achieve sealing between the negative steel tube 335 and the sealing member 334. An inner sealing ring 337 is arranged between the sealing member 334 and the endoscope guide tube 32 to achieve sealing between the sealing member 334 and the endoscope guide tube 32. A positive cable 34 is wrapped around the outer side of the endoscope guide tube 32 so that the positive cable 34 will not be pulled during the sliding process of the sealing member 334. The positive cable 34 extends all the way to the cutter head 1 to connect the blade 11. The negative cable 35 is connected to the negative steel tube 335. In addition, a liquid inlet and outlet 36 is provided at the front end of the spring 333, which is connected to the water pipe 41. The gap between the negative steel pipe 335 and the endoscope guide tube 32 serves as a suction channel 22 for liquid in and out, and extends to the blade 1 to complete the closed-loop suction and perfusion passage.

[0027] Reference Figure 4 The cutter head 1 comprises a blade 11, a ceramic head 12, an axis 13 and an axis 2 14, a transmission member 21 is arranged in the cutter bar; a cutter groove 121 is provided in the ceramic head 12. The seal 334 is connected to the transmission member 21 by snapping at the end of the cutter bar 2 near the handle 3, the transmission member 21 is rotatably connected to the blade 11 at one end of the cutter head 1 through the axis 13, a track 15 is arranged in the blade 11, the axis 13 is restricted to move in the track 15, and the axis 2 14 passes through the track 2 16 and is fixed on the ceramic head 12; Working principle: When the button 331 is pressed, the stopper 332 drives the sealing member 334, and the shaft 13 pulls the blade 11 through the transmission member 21. At this time, the shaft 13 slides in the track 15, and the shaft 2 14 limits the blade 11. Under the track of the track 2 16, the blade 11 extends out of the knife groove 121, and the whole assembly is reciprocated. The blade 11 can perform reciprocating cutting. When the button 331 is restored, the transmission member 21 is pulled back under the action of the spring 333, and the blade 11 will return to the knife groove 121. When in use, the endoscope will be inserted into the endoscope guide tube 32. When the endoscope field of view needs to be cleaned, the perfusion function is turned on, and the physiological saline will go along the drip channel, enter the water pipe 41, pass through the liquid inlet and outlet 36, enter the suction channel 22, and finally enter the knife groove 121 at the suction channel opening 23 to flush the surgical field, while also enhancing the plasma excitation efficiency; when it is necessary to clean the turbid liquid during the operation, the suction function is turned on, and the liquid can be drawn out of the negative pressure suction tube 6 along the same pathway.

[0028] During the operation, when the button 331 is in the natural state, the blade 11 is retracted into the blade groove 121. After being inserted into the carpal tunnel to be cut, the button 331 is pressed, the blade 11 is extended, and the host is turned on to supply energy. Under bipolar cutting, the carpal tunnel can be cut quickly and blood coagulation can be effectively achieved.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plasma tissue dissociation knife, characterized in that: include: A cutter head (1), a cutter bar (2), a handle (3) and a cable (4) connected in sequence; The cutter head (1) comprises a blade telescopic assembly arranged at the head, the cutter rod (2) comprises a negative steel tube (335), a transmission member (21) is arranged inside the negative steel tube (335), an endoscope guide tube (32) and a cutter head telescopic control mechanism (33) are arranged inside the handle (3), the cutter head telescopic control mechanism (33) drives the blade (11) in the blade telescopic assembly to telescope through the transmission member (21); a positive cable (34) is wrapped around the outside of the endoscope guide tube (32), the positive cable (34) extends to the cutter head (1) and is connected to the blade telescopic assembly, the negative steel tube (335) is connected to the negative cable (35), and dual-frequency emitter cutting is formed at the blade telescopic assembly; The suction channel (22) provided in the knife rod (2) is used to flush the surgical field through the irrigation tube (5) connected to the cable (4), and the suction channel (22) is used to suction turbid fluid during surgery through the negative pressure suction tube (6) connected to the cable (4).

2. The plasma tissue dissociation knife according to claim 1, characterized in that: The blade telescopic assembly comprises a shaft (13), the blade (11) is rotatably connected to the transmission member (21) via the shaft (13), and the blade (11) is connected to the positive cable (34). A ceramic head (12) is provided at the front end of the blade head (1), a track (15) is provided in the ceramic head (12), and the shaft (13) reciprocates in the track (15).

3. The plasma tissue dissociation knife according to claim 2, characterized in that: The blade telescopic assembly further comprises a second shaft (14), a second track (16) is provided in the blade (11), the second shaft (14) passes through the second track (16) and is fixed on the ceramic head (12), and the blade (11) reciprocates and telescopes along the second shaft (14).

4. The plasma tissue dissociation knife according to claim 1, characterized in that: The blade extension and retraction control mechanism (33) comprises a button (331), the lower end of the button (331) is connected to a limiter (332), a spring (333) is provided in the limiter (332), the spring (333) is sleeved on the outside of the negative electrode steel tube (335), a sealing member (334) is provided in the negative electrode steel tube (335), the sealing member (334) is fixed to the limiter (332), and the sealing member (334) is connected to the transmission member (21).

5. The plasma tissue dissociation knife according to claim 4, characterized in that: An outer sealing ring (336) is arranged outside the sealing member (334), and the negative electrode steel tube (335) and the sealing member (334) are sealed by the outer sealing ring (336).

6. The plasma tissue dissociation knife according to claim 4, characterized in that: An inner sealing ring (337) is provided between the sealing member (334) and the endoscope guide tube (32), and the sealing member (334) and the endoscope guide tube (32) are sealed via the inner sealing ring (337).

7. The plasma tissue dissociation knife according to claim 4, characterized in that: The cable (4) comprises a water pipe (41) and an electric cable (42); the end of the water pipe (41) is divided into two parts via a three-way interface; one end of the three-way interface is connected to the negative pressure suction tube (6), and the other end of the three-way interface is connected to the perfusion tube (5).

8. The plasma tissue dissociation knife according to claim 7, characterized in that: A liquid inlet and outlet (36) is provided at the front end of the spring (333), and the liquid inlet and outlet (36) is in communication with the water delivery pipe (41).

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