A plasma tissue dissociation knife

Abstract

This invention discloses a plasma tissue dissection knife, relating to the field of medical device technology. To address the problem of reduced surgical efficiency caused by frequent instrument switching during endoscopic surgery involving multiple instruments, the following technical solution is proposed: It includes a blade head, a blade shaft, a handle, and a cable connected in sequence. The blade head includes a blade telescopic assembly located at the tip. The handle houses an endoscope guide tube and a blade telescopic control mechanism, which drives the blade extension and retraction of the blade telescopic assembly via a transmission component. A positive electrode cable extends to the blade head and connects to the blade telescopic assembly, while a negative electrode steel pipe connects to a negative electrode cable, forming a dual-frequency polarized cutting pattern at the blade. A suction channel within the blade shaft is used for surgical field irrigation and intraoperative fluid aspiration. This invention significantly improves upon traditional cold instruments in terms of cutting efficiency, bleeding control, surgical field clarity, optimized blade shaft size, cutting flexibility, sealing performance, and ease of operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a plasma tissue dissociation knife. Background Technology

[0002] Endoscopic surgery is a minimally invasive surgical procedure performed through small incisions or natural body openings. Endoscopic surgery typically involves using specialized equipment and remotely controlled instruments to indirectly visualize the surgical area via an endoscope or similar device. Compared to open surgery, endoscopic surgery may reduce surgical trauma and shorten hospital stays.

[0003] Carpal tunnel syndrome is a median neuropathy caused by compression of the median nerve within the carpal tunnel. Symptoms include tingling, numbness, weakness, or pain in the fingers or palm innervated by the median nerve. Repetitive tasks, forces, postures, and vibrations have been identified as contributing factors to carpal tunnel syndrome. Conservative treatment for carpal tunnel syndrome includes direct injection of corticosteroids, splinting, oral corticosteroids, and / or behavioral modifications.

[0004] Typically, endoscopic surgery involves multiple steps and multiple instruments. For successful cannulation, the central lumen of the cannula must be filled with a device, such as an occluder. The occluder is then removed, and an endoscope or arthroscopy is inserted into the cannula for visualization. The endoscope is then withdrawn from the cannula, or a scalpel is advanced into the cannula for dissection, or a specialized scalpel assembly is attached to the endoscope, and then the scalpel / endoscope assembly is advanced into the cannula for dissection.

[0005] Currently, there is still a lack of medical devices for efficient manipulation of tissues such as the carpal tube under endoscopy. Summary of the Invention

[0006] The purpose of this invention is to provide a plasma tissue dissociation knife to solve the problem that existing endoscopic surgeries involve multiple instruments and require frequent switching of instruments, which reduces surgical efficiency.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] A plasma tissue dissection knife includes: a blade head, a blade shaft, a handle, and a cable connected in sequence; the blade head includes a blade telescopic assembly disposed at the head, the blade shaft includes a negative electrode steel tube, a transmission component is disposed inside the negative electrode steel tube, and an endoscope guide tube and a blade telescopic control mechanism are disposed inside the handle, the blade telescopic control mechanism drives the blade in the blade telescopic assembly to telescopically extend and retract via the transmission component; a positive electrode cable is wound around the outside of the endoscope guide tube, the positive electrode cable extends to the blade head and connects to the blade telescopic assembly, the negative electrode steel tube is connected to the negative electrode cable, forming a dual-frequency polarized cutting at the blade telescopic assembly; an aspiration channel disposed inside the blade shaft irrigates the surgical field through an irrigation tube connected by the cable, and aspiration channel aspirates intraoperative turbid fluid through a negative pressure suction tube connected by the cable.

[0009] Preferably, the blade telescopic assembly includes a shaft, the blade is rotatably connected to the transmission component via the shaft, and the blade is connected to the positive cable. The front end of the blade head is provided with a ceramic head, and a track is provided inside the ceramic head. The shaft moves back and forth within the track.

[0010] Preferably, the blade telescopic assembly also includes a second shaft, a second track is provided inside the blade, the second shaft passes through the second track and is fixed to the ceramic head, and the blade reciprocates and extends along the second shaft.

[0011] Preferably, the blade extension control mechanism includes a button, the lower end of which is connected to a limiting member, a spring is provided inside the limiting member, the spring is sleeved on the outside of the negative electrode steel tube, a sealing member is provided inside the negative electrode steel tube, the sealing member is fixed to the limiting member, and the sealing member is connected to the transmission member.

[0012] Preferably, an outer sealing ring is provided outside the sealing element, and the negative electrode steel pipe and the sealing element are sealed by the outer sealing ring.

[0013] Preferably, an inner sealing ring is provided between the sealing element and the endoscope guide tube, and the sealing element and the endoscope guide tube are sealed by the inner sealing ring.

[0014] Preferably, the cable includes a water supply pipe and a power cable, with the end of the water supply pipe splitting into two via a T-junction, which are respectively connected to a negative pressure suction pipe and an injection pipe.

[0015] Preferably, the front end of the spring is provided with a liquid inlet / outlet, which is connected to the water supply pipe.

[0016] The present invention has the following beneficial effects:

[0017] High-efficiency cutting and low bleeding: The bipolar radiofrequency design makes the cutting process faster and more precise. Dual-frequency radiofrequency cutting technology effectively reduces bleeding during surgery, minimizes surgical risks, and improves surgical safety.

[0018] Clear surgical field and convenient cleaning: The shared channel for infusion and suction not only simplifies the surgical procedure but also significantly improves the cleaning and clarity of the surgical field. This design allows for the immediate flushing away of blood and tissue debris during the procedure, maintaining a clear surgical view and thus improving surgical efficiency and quality.

[0019] Optimized scalpel size: The common channel design effectively reduces the overall size of the scalpel, making the device more compact and lightweight. This not only facilitates the surgeon's operation during surgery but also reduces invasiveness to the patient, improving patient comfort.

[0020] The high efficiency of dual-frequency anemometer cutting: By creating dual-frequency anemometer cutting at the blade telescopic assembly, highly efficient and precise cutting results are achieved. This technology provides more stable and uniform cutting energy, reduces thermal damage, and further improves surgical precision and safety.

[0021] The blade telescopic assembly offers flexibility: the blade is rotatably connected to the transmission mechanism via a pivot and reciprocates within a track, providing flexible cutting capabilities. This design allows for more precise surgical procedures and can adapt to tissues of different shapes and sizes.

[0022] Improved sealing performance: The use of outer and inner sealing rings effectively enhances the equipment's sealing performance. This prevents liquid or gas leakage, protects internal electronic components, and ensures long-term stable operation of the equipment.

[0023] Ease of use: The blade extension and 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 ease of use into account, reducing cable complexity and operation difficulty. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the plasma tissue dissociation knife structure of the present invention;

[0025] Figure 2 This is a cross-sectional view of the handle of the present invention;

[0026] Figure 3 This is a cross-sectional view of the cutter head telescopic control mechanism of the present invention;

[0027] Figure 4 This is a cross-sectional view of the cutting head of the present invention;

[0028] Figures 1 to 4The reference numerals in the attached drawings represent: cutter head 1, blade 11, ceramic head 12, cutter groove 121, shaft one 13, shaft two 14, track one 15, track two 16, cutter bar 2, transmission component 21, suction channel 22, suction channel opening 23, handle 3, handle housing 31, endoscope guide tube 32, cutter head telescopic control mechanism 33, positive cable 34, negative cable 35, liquid inlet / outlet 36, button 331, limit component 332, spring 333, seal 334, negative steel pipe 335, outer sealing ring 336, inner sealing ring 337, cable 4, water supply pipe 41, cable 42, negative pressure suction pipe 6, and injection pipe 5. Detailed Implementation

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1 The present invention provides a plasma tissue dissociation knife, comprising a knife head 1, a knife bar 2, a handle 3 and a cable 4 connected in sequence; wherein the cable 4 includes a water supply pipe 41 and a cable 42, and the end of the water supply pipe 41 is split into two by a three-way interface, which are respectively connected to a negative pressure suction pipe 6 and an infusion pipe 5.

[0031] Reference Figure 2 It includes a handle housing 31, an endoscope guide tube 32, and a blade extension and retraction control mechanism 33. The endoscope guide tube 32 serves as the insertion channel for the endoscope, passing through the entire handle 3 and blade 2 to observe the field of view at the blade 1.

[0032] Reference Figure 3The mechanism is located at the connection between the handle 3 and the tool holder 2, and includes a button 331, a limiting member 332, a spring 333, and a seal 334. The lower end of the button 331 contacts the limiting member 332, which is restricted to move within a limiting groove. A spring 333 is installed inside the limiting member 332 and is sleeved on the outside of the negative electrode steel tube 335. The seal 334 is installed inside the negative electrode steel tube 335 and is fixed to the limiting member 332. Pressing and releasing the button 331 can drive the limiting member 332 and the seal 334 to move synchronously. The seal 334 is located at the negative electrode... The steel pipe 335 slides within the pipe. Meanwhile, an outer sealing ring 336 is provided outside the sealing element 334 to achieve a seal between the negative steel pipe 335 and the sealing element 334. An inner sealing ring 337 is provided between the sealing element 334 and the endoscope guide tube 32 to achieve a seal between the sealing element 334 and the endoscope guide tube 32. A positive cable 34 is wrapped around the outside of the endoscope guide tube 32 so that the positive cable 34 will not be pulled during the sliding of the sealing element 334. The positive cable 34 extends all the way to the blade head 1 to connect to the blade 11. The negative cable 35 is connected to the negative steel pipe 335.

[0033] In addition, a liquid inlet / outlet 36 is provided at the front end of the spring 333, which is connected to the water supply pipe 41. The gap between the negative electrode steel pipe 335 and the endoscope guide tube 32 serves as a suction channel 22 for liquid inlet / outlet, and extends to the cutter head 1 to complete the suction and infusion closed loop.

[0034] Reference Figure 4 The cutter head 1 includes a blade 11, a ceramic head 12, a first shaft 13, and a second shaft 14. A transmission component 21 is provided inside the cutter shank. A cutter groove 121 is formed inside the ceramic head 12. A seal 334 is connected to the transmission component 21 by a snap-fit ​​at the end of the cutter shank 2 near the handle 3. The transmission component 21 is rotatably connected to the blade 11 at one end of the cutter head 1 via the first shaft 13. A first track 15 is provided inside the blade 11, and the first shaft 13 is restricted to move within the first track 15. The second shaft 14 passes through the second track 16 and is fixed on the ceramic head 12.

[0035] Working principle:

[0036] When button 331 is pressed, limiter 332 drives seal 334, and through transmission 21, shaft 13 pulls blade 11. At this time, shaft 13 slides in track 15, shaft 2 14 restricts blade 11, and under the trajectory of track 2 16, blade 11 extends out of the cutter groove 121, and the entire assembly is pulled back and forth, and blade 11 can perform reciprocating cutting. When button 331 is reset, transmission 21 is pulled back under the action of spring 333, and blade 11 will return to cutter groove 121.

[0037] During use, the endoscope is inserted into the endoscope guide tube 32. When it is necessary to clean the endoscopic field of view, the irrigation function is turned on, and physiological saline will enter the water inlet tube 41 along the drip channel, enter the suction channel 22 through the liquid inlet / outlet 36, and finally enter the knife groove 121 at the suction channel opening 23 to rinse the surgical field. At the same time, it can also enhance the efficiency of plasma excitation. When it is necessary to clean the intraoperative turbid fluid, the suction function is turned on, and the fluid can be drawn out of the negative pressure suction tube 6 along the same path.

[0038] During the surgery, with button 331 in its natural state, the blade 11 is retracted into the blade slot 121. After inserting it into the carpal tunnel to be cut, button 331 is pressed, the blade 11 extends, and the main unit is turned on to supply energy. Under bipolar cutting, the carpal tunnel can be cut quickly and effectively coagulates blood.

[0039] 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plasma tissue dissociation knife, characterized in that, include: The cutter head (1), cutter bar (2), handle (3) and cable (4) are connected in sequence. The blade head (1) includes a blade telescopic assembly located at the head. The blade handle (2) includes a negative electrode steel tube (335). A transmission component (21) is provided inside the negative electrode steel tube (335). An endoscope guide tube (32) and a blade telescopic control mechanism (33) are provided inside the handle (3). The blade telescopic control mechanism (33) drives the blade (11) in the blade telescopic assembly to telescopically extend and retract through the transmission component (21). A positive electrode cable (34) is wrapped around the outside of the endoscope guide tube (32). The positive electrode cable (34) extends to the blade head (1) and connects to the blade telescopic assembly. The negative electrode steel tube (335) is connected to the negative electrode cable (35). A dual-frequency polarized cutting is formed at the blade telescopic assembly. The suction channel (22) inside the blade (2) is used for irrigation of the surgical field through the irrigation tube (5) connected by the cable (4), and the suction channel (22) is used for suction of intraoperative turbid fluid through the negative pressure suction tube (6) connected by the cable (4); the blade telescopic assembly includes a shaft (13), the blade (11) is rotatably connected to the transmission component (21) through the shaft (13), and the blade (11) is connected to the positive electrode cable (34); the front end of the blade head (1) is provided with a ceramic head (12), and the ceramic head (12) is provided with a rail. The first track (15) and the first shaft (13) reciprocate within the first track (15). The cutter head extension control mechanism (33) includes a button (331). The lower end of the button (331) is connected to a limiting member (332). A spring (333) is provided inside the limiting member (332). The spring (333) is sleeved on the outside of the negative electrode steel pipe (335). A sealing member (334) is provided inside the negative electrode steel pipe (335). The sealing member (334) is fixed to the limiting member (332). The sealing member (334) is connected to the transmission member (21).

2. The plasma tissue dissociation knife according to claim 1, characterized in that, The blade telescopic assembly also includes a second shaft (14), and a second track (16) is provided inside the blade (11). The second shaft (14) passes through the second track (16) and is fixed on the ceramic head (12). The blade (11) reciprocates along the second shaft (14).

3. The plasma tissue dissociation knife according to claim 1, characterized in that, An outer sealing ring (336) is provided outside the sealing element (334), and the negative electrode steel pipe (335) and the sealing element (334) are sealed by the outer sealing ring (336).

4. The plasma tissue dissociation knife according to claim 1, characterized in that, An inner sealing ring (337) is provided between the sealing element (334) and the endoscope guide tube (32), and the sealing element (334) and the endoscope guide tube (32) are sealed by the inner sealing ring (337).

5. The plasma tissue dissociation knife according to claim 1, characterized in that, The cable (4) includes a water supply pipe (41) and an electric cable (42). The end of the water supply pipe (41) is split into two through a three-way interface. One end of the three-way interface is connected to the negative pressure suction pipe (6), and the other end of the three-way interface is connected to the injection pipe (5).

6. The plasma tissue dissociation knife according to claim 5, characterized in that, The spring (333) has a liquid inlet / outlet (36) at its front end, and the liquid inlet / outlet (36) is connected to the water pipe (41).

Images