A medical water jet device

Abstract

The application discloses a medical water jet device, which comprises a water jet assembly and a transmission assembly. The water jet assembly comprises a water jet and a built-in gear. The water jet is connected to the built-in gear. The water jet comprises a body and a fluid channel in the body. The fluid channel extends axially along the body. The transmission assembly comprises a motor and a gear assembly. The motor drives the gear assembly to rotate. The gear assembly is engaged with the built-in gear to drive the water jet to rotate around the axis of the body. The medical water jet device has higher operation flexibility and can reduce the complexity of water jet surgery.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a medical water jet device. BACKGROUND

[0002] The medical water jet is a kind of medical equipment which enters the lesion area through the natural cavity of the human body for resection surgery, for example, a medical water jet used for entering the prostate lesion area through the urethra for resecting the hyperplasia part of the prostate. The medical water jet is a new type of non-invasive surgical equipment, which usually needs to be assisted by modern medical equipment such as endoscopes and minimally invasive surgical tools for surgery. Non-invasive surgery has the advantages of strong practicability and high precision compared with traditional medical equipment, which can reduce the difficulty of surgery. In addition, by using non-invasive surgical instruments, the pressure on the doctor during the implementation of the surgery can be greatly reduced, so that the surgery can be completed more easily and quickly, the accuracy and success rate of the surgery can be improved, and a better treatment experience can be obtained. Therefore, as a non-invasive surgical equipment, the medical water jet has been widely used in many departments of hospitals.

[0003] The current medical water jet is generally a hollow slender cylindrical structure, and high-pressure fluid is sprayed to the lesion area by the water jet. Generally, the medical water jet can be advanced or retreated along its axial direction under the operation control of the doctor or the surgical robot. However, due to the large difference in size and shape of different lesions, many times the medical water jet cannot be completely scraped off the lesion even by repeated forward and backward movement, or the doctor needs to master more difficult operation skills and spend more time to completely scrape off the lesion, thereby increasing the complexity of the surgery and the surgery process time, and also increasing the pain and potential risk of the patient. SUMMARY

[0004] The main purpose of the present application is to provide a medical water jet device with higher operation flexibility to reduce the complexity of using the medical water jet for surgery.

[0005] A medical water jet device, comprising: a water jet assembly and a transmission assembly, the water jet assembly comprising a water jet and an internal gear, the water jet being connected to the internal gear, wherein the water jet comprises a body and a fluid channel located inside the body, the fluid channel extending axially along the body, the transmission assembly comprising a motor and a gear assembly, the motor driving the gear assembly to rotate, the gear assembly engaging with the internal gear to drive the water jet to rotate around the axial direction of the body.

[0006] The medical water jet device further comprises an endoscope assembly and a guide, the water jet assembly and the endoscope assembly being assembled into an integral structure through the guide.

[0007] The guide comprises a water jet channel and an endoscope channel, the water jet channel and the endoscope channel are not interfered with each other, the water jet passes through the water jet channel, and the endoscope assembly passes through the endoscope channel.

[0008] The water jet channel is a groove structure extending along the length direction of the guide and penetrating through the guide, and the endoscope channel is a through hole extending along the length direction of the guide and penetrating through the guide.

[0009] The groove structure and the through hole are not communicated with each other.

[0010] The water jet assembly further comprises a water return rod, the water return rod is a structure with a semicircular cross section, the water return rod cooperates with the groove structure to cover the water jet, and the water return rod is detachably mounted to the guide.

[0011] The water return rod comprises a plurality of water return openings, the water return openings are located at the end of the water return rod and face the side of the water jet.

[0012] The medical water jet device further comprises a tower joint, the proximal end of the water return rod is connected to a return pipe through the tower joint, and the return pipe is connected to a peristaltic pump.

[0013] The endoscope assembly comprises a carbon fiber pipe, a flexible joint, and an endoscope, the endoscope is connected to the end of the flexible joint, the flexible joint is connected to the carbon fiber pipe and located between the end of the carbon fiber pipe and the endoscope.

[0014] The endoscope assembly further comprises a steel wire, one end of the steel wire passes through the inside of the carbon fiber pipe and is connected to the flexible joint.

[0015] The medical water jet device further comprises a handle controller, the handle controller comprises a transmission wheel and a control rod, the other end of the steel wire is wound around the transmission wheel, and the transmission wheel is driven to rotate by pushing the control rod to control the bending of the flexible joint.

[0016] The flexible joint comprises a plurality of hyoid connection blocks, the hyoid connection blocks comprise grooves and bosses, and adjacent hyoid connection blocks are connected in front and back combination through the cooperation of the grooves and the bosses.

[0017] The water jet comprises a cutter head, the cutter head is located at the end of the body, and the built-in gear is nested outside the water jet and located at the end opposite to the cutter head.

[0018] The transmission assembly comprises a motor control layer and a transmission layer, the motor is located in the motor control layer, and the built-in gear is located in the transmission layer.

[0019] The gear assembly comprises a shaft coupling, a control layer gear, a transmission layer gear and a long column gear, wherein the shaft coupling and the control layer gear are located in the motor control layer, the transmission layer gear and the long column gear are located in the transmission layer, the motor is connected to the control layer gear through the shaft coupling, the control layer gear is engaged with the transmission layer gear, the transmission layer gear is engaged with the long column gear, and the long column gear is engaged with the built-in gear.

[0020] The medical water jet device of the embodiment of the present application generates power through a motor and transmits the power to the water jet through the engagement of the gear assembly and the built-in gear, so that the water jet generates rotary motion, the fluid jet range generated through the fluid passage inside the water jet is increased, the removal of the lesion is more complete, and the operation is simpler, thereby reducing the complexity of the operation and the operation process time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0022] The various features and embodiments mentioned in the above aspects with respect to the present application, as appropriate, can be applied to other aspects with appropriate modifications. Therefore, the specific features in one aspect can be appropriately combined with the specific features in other aspects.

[0023] Other advantages, objects, and features of the present application will be understood by those skilled in the art from the following description, and will be partly apparent from the description, and will be partly understood by those skilled in the art from the study and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0025] Figure 1 is a schematic diagram of the overall structure of the medical water jet device of an embodiment of the present application;

[0026] Figure 2 is Figure 1 is a schematic diagram of the disassembled state of the handle controller and the endoscope assembly in the medical water jet device shown;

[0027] Figure 3 is a schematic diagram of the endoscope assembly of the medical water jet device of an embodiment of the present application;

[0028] Figure 4 is Figure 3A partial enlarged view of the B part shown in the figure;

[0029] Figure 5 A structure schematic view of a water jet assembly and an endoscope assembly combined into an actuator of an embodiment of the medical water jet device of the present application;

[0030] Figure 6 A Figure 5 A partial enlarged view of the A1 part shown in the figure;

[0031] Figure 7 A Figure 5 A partial enlarged view of the A2 part shown in the figure;

[0032] Figure 8 A schematic view of a water jet assembly of an embodiment of the medical water jet device of the present application;

[0033] Figure 9 A Figure 8 A partial enlarged view of the C part shown in the figure;

[0034] Figure 10 A structure schematic view of an actuator of an embodiment of the medical water jet device of the present application from another perspective;

[0035] Figure 11 An exploded schematic view of a transmission assembly and an actuator of an embodiment of the medical water jet device of the present application;

[0036] Figure 12 A simplified schematic view of a water jet rotation transmission of an embodiment of the medical water jet device of the present application.

[0037] Explanation of reference signs:

[0038] 1: medical water jet device; 10: water jet assembly; 20: transmission assembly; 30: endoscope assembly; 40: handle controller; 50: peristaltic pump; 60: high pressure pump; 601: 101: water jet; 102: guide; 103: water return rod; 103a: water return opening; 110: body; 111: front end of the blade body; 112: tail end of the blade body; 116: fluid passage; 201: motor control layer; 203: transmission layer; 211: motor; 212: coupling; 213: control layer gear; 230: built-in gear; 231: transmission layer gear; 232: long column type gear; 301: carbon fiber tube; 302: steel wire; 303: flexible joint; 305: endoscope; 330: hyoid connection block; 331: groove; 332: boss; 351: LED lamp; 352: lens; 401: control rod; 403: button; 405: Luer connector; 407: image data output interface; 410: installation groove; 411: slot; 413: spring; 414: transmission wheel; 70: pagoda joint; 701: return pipe. DETAILED DESCRIPTION

[0039] In order to make the purposes, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with the aid of the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0040] The terms “first” and “second” and the like in the specification of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first accommodating cavity and the second accommodating cavity are used to distinguish different accommodating cavities, rather than to describe a specific order of the accommodating cavities. The terms “inner”, “middle”, “bottom”, “upper”, and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In the embodiments of the present application, the words “exemplary” or “for example” are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of “exemplary” or “for example” is intended to present concepts in a particular manner.

[0042] It should be noted that, in this document, the terms “comprise”, “contain” or any other variant thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that contains a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0043] The specific embodiments of the present application are further described below with reference to the accompanying drawings.

[0044] Please refer to Figure 1Figure 1 is a schematic diagram of the overall structure of a medical water jet device according to an embodiment of the present application. The medical water jet device 1 comprises a water jet assembly 10 and a transmission assembly 20. The water jet assembly 10 can be driven by the transmission assembly 20 to rotate around the longitudinal axis of the water jet assembly 10, so that the high-pressure fluid ejected from the water jet assembly 10 can expand the fluid ejection range and improve the operation flexibility of the medical water jet device 1. The medical water jet device 1 further comprises an endoscope assembly 30 and a handle controller 40. One end of the endoscope assembly 30 is connected to the handle controller, and the other end passes through the transmission assembly 20 and is combined with the water jet assembly 10 into an integral execution mechanism to enter the human body. The handle controller 40 can be used to operate the movement of the endoscope assembly 30 in the human body, so as to reach the lesion area and obtain the image of the lesion area. The high-pressure pump 60 can pressurize the surgical fluid such as normal saline to form high-pressure fluid, which is injected into the water jet assembly 10 through the high-pressure pump injection pipe, and then ejected from the nozzle of the water jet assembly 10 to the lesion area for scraping. The waste liquid and the scraped lesion tissue generated in this process can be discharged in time to the waste water tank through the peristaltic pump 50 connected to the water jet assembly 10, so as to avoid the waste liquid flowing to the floor of the operating room and ensure the cleanliness of the operating room.

[0045] The transmission assembly 20 is a rectangular box as a whole. As an example, the transmission assembly adopts a layered design structure, and the upper layer is a motor control layer 201, and the lower layer is a transmission layer 203. The motor control layer 201 contains a motor, and the transmission layer 203 contains a gear assembly. The motor can drive the gear assembly to rotate the water jet assembly 10.

[0046] The handle controller 40 comprises a control rod 401, by which the position of the endoscope assembly 30 connected thereto can be adjusted. The handle controller 40 can further comprise at least one button (or key) 403, which can be used to adjust the image parameters of the endoscope assembly 30 and can support the configuration of multiple image function items. The upper part of the handle controller 40 can further be provided with a luer joint 405, which can serve as an insertion port for external instruments and can support multiple medical devices. For example, endoscopic diagnosis and treatment accessories can be inserted and pulled out from the luer joint 405 for operation. The handle controller 40 can further comprise an image data output interface 407 for an adapted image data acquisition card to acquire the image collected by the endoscope assembly. The structure of the handle controller 40 can also be designed according to ergonomics to avoid hand pain, fatigue and other symptoms caused by long-time holding by the doctor.

[0047] Please refer to Figure 2 , which is Figure 1The handle controller 40 and the endoscope assembly 30 are disassembled in the medical water jet device. The shell part of the handle controller 40 is connected by the snap buckle slot connection method composed of the upper shell (not marked) and the lower shell (not marked). The inside of the handle controller 40, for example, the lower shell is provided with a mounting groove 410, which can be a circular groove, and the bottom center is provided with a protruding positioning hollow cylinder. The mounting groove 410 is used to install the spring 413 and the transmission wheel 414, which are elastically connected, and the transmission wheel 414 is fixedly connected with the mounting groove 410 through the positioning hollow cylinder, and the spring 413 and the transmission wheel 414 are clamped between the upper shell and the lower shell. The slot 411 is opened on the mounting groove 410, one end of the steel wire 302 enters the handle controller 40, passes through the cavity surrounded by the upper shell and the lower shell, and is wound on the transmission wheel 414 through the slot 411, and the other end of the steel wire 302 passes through the carbon fiber pipe 301 of the endoscope assembly 30 and is connected with the flexible joint 303. The end or side of the handle control 40 is provided with a control rod 401, which is in the shape of "L" as a whole. The control rod 401 is hingedly connected to the inner center of the transmission wheel 414 through a pin shaft, and the rotation of the transmission wheel 414 can be controlled by pushing the control rod 401, so as to adjust the tension of the steel wire 301 wound on the transmission wheel 414, and the flexible joint 303 can be bent left and right by pulling the steel wire 302. According to the force of the operator, the flexible joint 303 can be bent to different degrees, and the endoscope connected to the end of the flexible joint 303 can also be flexibly bent and deflected, so that the doctor can maximize the view of the lesion.

[0048] In some embodiments, in addition to using a steel wire transmission layout to control the bending of the endoscope, the handle controller 40 also has a pre-tightening screw (not shown in the figure) in the control rod 401, so that the steel wire 302 can be pre-tightened directly through the pre-tightening screw, and the problem of the steel wire 302 being elongated after being stressed for a long time can be solved.

[0049] Please further refer to Figure 3This is a schematic diagram of the endoscope assembly of a medical water jet device according to one embodiment of this application. The endoscope assembly 30 includes a carbon fiber tube 301, a flexible joint 303, and an endoscope 305. The carbon fiber tube 301 is a rigid hollow tube, through which various wires can pass, such as data cables and power cables connecting to the endoscope 305. The flexible joint 303 can be a flexible wrist joint, which is connected to the end of the carbon fiber tube 301. The endoscope 305 is connected to the end of the flexible joint 303. A steel wire 302 extending from the end of the handle controller 40 is wrapped in the carbon fiber tube 301 and passes through and connects to the flexible joint 303, so that the flexible joint 303 can be bent by the movement of the steel wire 302. Compared to the traditional rigid rod solution where the endoscope 305 is directly connected to the end of the carbon fiber tube 301, the medical water jet device 1 of this application has a flexible joint 303 between the carbon fiber tube 301 and the endoscope 305. This flexible joint 303 allows the endoscope 305 to bend freely, reducing blind spots and facilitating doctors' observation of the patient's lesions, thus providing more reliable and accurate tissue removal. At the same time, this combined design avoids the operational difficulties caused by an entirely flexible endoscope design, balancing operational flexibility and convenience.

[0050] Please refer to further details. Figure 4 ,yes Figure 3 The diagram shows a partially enlarged view of part B. The flexible joint 303 includes multiple hyoid bone connecting blocks 330, which are connected together as unit joints to form a flexible joint. The hyoid bone connecting blocks 330 ensure the synchronicity of the angular changes during the movement of each unit joint, avoiding rotational errors caused by inconsistent rotation directions, thus giving the flexible wrist joint a certain degree of stability during bending. Each hyoid bone connecting block 330 has a groove 332 and a boss 331 on its upper and lower surfaces, respectively. When multiple hyoid bone connecting blocks are combined front and back, adjacent hyoid bone connecting blocks 330 are combined through the cooperation of the groove 332 and the boss 331. The boss 331 of the preceding joint unit can rotate in a certain direction on the groove 332 of the following unit, completing the bending action of the flexible joint 303.

[0051] Figure 5 This is a schematic diagram of the structure of the actuator, which combines the water jet assembly and endoscope assembly of one embodiment of the medical water jet device of this application. The actuator is controlled by the transmission assembly 20 and the handle controller 40 to perform the function of viewing and scraping lesions during surgery. The actuator structure includes the water jet assembly 10, the endoscope assembly 30, and the guide 102. The guide 102 tightly integrates the water jet 101 and the endoscope assembly 30 into a compact actuator, facilitating its entry into the human body to reach the lesion. The water jet assembly 10 includes the water jet 101 and the return rod 103. The water jet 101 is used to spray high-speed fluid, and the return rod 103 is used to collect waste fluid and shed tissue.

[0052] Please refer to Figure 6 , is Figure 5 A1 part of the local enlarged schematic view. As an example, the guide 102 is a metal element with a water knife channel, which can be a groove structure extending along the length of the guide 102 and penetrating the guide 102, and the cross section of the guide 102 can be, for example, an arc structure similar to C shape. The water return rod 103 can be a structure with a semicircular cross section, and at least part of the water knife 101 is placed in the groove of the guide 102, and the water return rod 103 is matched with the groove structure of the guide 102 up and down to cover the water knife 101. The water return rod 103 is detachably mounted on the guide 102, so that the water return rod as a consumable can be easily disassembled. The guide 102 also has an endoscope channel inside, which can be a through hole with a diameter of 2mm penetrating the guide 102, extending along the length of the guide 102, and the endoscope assembly 30 is embedded in the endoscope channel to pass through the guide 102 to reach the lesion area. The endoscope channel can be located below and adjacent to the water knife channel, and the endoscope channel and the water knife channel can be arranged in parallel with each other, and the water knife channel and the endoscope channel do not interfere with each other, for example, they are not connected, or even if they are connected, it does not affect the operation of the water knife 101 and the endoscope assembly 30 in each channel. Under this structure, the carbon fiber tube 301 of the endoscope assembly 30 and the water knife assembly 10 are adjacent but pass through the guide 102 via independent channels to reach the lesion area, so that the actuator has the advantages of compactness, easy operation and high flexibility. In addition, the water knife channel and the endoscope channel of the guide 102 have a certain clearance space, which ensures enough space for the water knife 101 to rotate around the shaft, and on the other hand makes it easier for the endoscope assembly 30 to turn.

[0053] Please refer to Figure 7 , is Figure 5 A2 part of the local enlarged schematic view. The end part of the water return rod 103 towards the side (inner side) of the water knife 101 includes a plurality of water return openings 103a, which are used to absorb liquid such as tissue and water during the operation, and the absorbed liquid is transmitted to the outside through the water return channel inside the water return rod 103. As Figure 7 indicated, the water knife 101 assembly and the endoscope assembly 30 are combined into a whole tubular actuator through the guide 102, which is convenient for the doctor to operate and stretch into the human body.

[0054] Please refer to Figure 8 and Figure 9 , Figure 8 is a schematic view of the water knife assembly of the medical water knife device of an embodiment of the present application, Figure 9 is Figure 8A partially enlarged schematic diagram of part C is shown. The waterjet assembly includes a waterjet 101 and an internal gear 230, with the waterjet 101 connected to the internal gear 230. The waterjet 101 includes a body 110 and a fluid channel 116 located inside the body 110, the fluid channel 116 being axially aligned with the body 110. Figure 9 (Extending in the direction of the dashed line). In one example, the body 110 of the water jet 101 is a slender cylindrical structure with a diameter of approximately 2.5 mm, while the fluid channel 116 is a slender through-hole extending axially inside the body 110, meaning the water jet 101 is a hollow cylindrical structure. The opening at the front end 111 of the water jet 101 serves as the nozzle (also called the water jet head) of the water jet 101. The tail end 112 of the water jet 101 is connected to the high-pressure pump jet pipe, and then connected to the high-pressure pump 60 through the high-pressure pump jet pipe. The high-pressure pump 60 pressurizes the externally supplied saline solution and sprays it through the high-pressure pump jet pipe, such as the fluid channel 116 of the water jet 101, and finally through the nozzle into the lesion area in a bundle shape. As an example, the built-in gear 230 is fitted outside the water jet body 110 of the water jet 101 and near the tail end 112 of the blade, i.e., the end opposite to the head. The built-in gear 230 is fastened to the water jet 101 so that the water jet 101 rotates with the built-in gear 230.

[0055] In the treatment of diseases such as benign prostatic hyperplasia, a number of instruments are required because the pathological condition of the lesion needs to be detected during the treatment process and a water jet needs to be used to cut the lesion inside the body. The medical water jet instrument of this application assembles the water jet 101, endoscope assembly 30 and return water rod 103 into an integrated actuator through the guide 102, so that these instruments can be smoothly inserted into the body as a whole.

[0056] Please refer to Figure 10 This is a schematic diagram of the actuator of a medical water jet device according to one embodiment of this application from another perspective. The endoscope 305 located at the end of the flexible joint 303 includes an LED light 351 and a lens 352. The LED light 351 is used to illuminate the lesion area, and the lens 352 is used to capture images of the lesion area. The imaging information can be transmitted to an external display screen in real time so that doctors can observe the specific condition of the lesion area, providing important basis and guidance for treatment and increasing the safety of the operation.

[0057] Please refer to Figure 11 and Figure 12 , Figure 11 This is an exploded view of the transmission components and actuator of a medical water jet device according to one embodiment of this application. Figure 12is a simplified schematic diagram of the water jet rotation transmission of the medical water jet device according to an embodiment of the present application. The carbon fiber tube 301 of the endoscope assembly 30 is wrapped outside the steel wire 302 leading out from the handle controller 40, and the steel wire 302 is inserted into the transmission layer 203 from the endoscope channel opening on the proximal side of the outer shell of the transmission layer 203, and is led out of the transmission layer 203 from the distal end of the outer shell. The built-in gear 230 is located inside the transmission layer 203 and is nested on the periphery of the water jet 101, and as an example, the built-in gear 230 is located near the tail end 112 of the blade body. The tail end 112 of the blade body is connected to the high-pressure pump through the high-pressure pump jet pipe 601, and high-pressure physiological saline is obtained through the high-pressure pump jet pipe 601. The water jet assembly 10 can be connected to the high-pressure pump jet pipe 601 in a manner such as bonding, which can achieve stable connection and quick connection, and at the same time, the water jet assembly 10 and the high-pressure pump jet pipe 601 can also be quickly disassembled. A bomb joint 70 is provided near the distal end of the outer shell of the transmission layer 203, the bomb joint 70 is sleeved outside the water return rod 103 and located at the proximal end of the water return rod 103, wherein the proximal end is the other end opposite to the distal end. The bomb joint 70 has an opening. The water return rod 103 has an opening corresponding to the opening of the bomb joint, and the two openings are aligned and communicated, and the water return opening 103a of the water return rod 103 is in communication with the internal water return channel. The return pipe 701 is connected at the opening of the bomb joint 70, and the peristaltic pump 50 is connected through the return pipe 701, so that a complete channel for waste liquid return is formed. The connection between the bomb joint 70 and the return pipe 701 is screw connection, quick connector connection or bonding.

[0058] The transmission assembly 20 comprises at least one motor 211 and a gear assembly, the motor 211 drives the gear assembly to rotate, the gear assembly is engaged with the built-in gear 230 to drive the water knife 101 to rotate around the axial direction of the body 110. The motor 211 is located in the motor control layer 201, and can provide driving force after being powered on. The specific form of the gear assembly can be arranged according to different needs, and the type, size and number of gears contained in the gear assembly can be designed according to needs. As an example, the gear assembly can comprise a shaft coupling 212 located in the motor control layer 201, a control layer gear 213, and a transmission layer gear 231 and a long column type gear 232 located in the transmission layer 203. The output shaft of the motor 211 is connected to one end of the shaft coupling 212, the other end of the shaft coupling 212 is connected to the control layer gear 213, and the power and torque of the motor 211 are transmitted through the shaft coupling 212 to drive the control layer gear 213. The control layer gear 213 and the transmission layer gear 231 are located near the proximal end of the shell, and since the motor control layer 201 and the transmission layer 203 are stacked from top to bottom, the control layer gear 213 is engaged with the transmission layer gear 231 from top to bottom, thereby transmitting the power generated by the motor control layer 201 located in the upper layer to the transmission layer 203 located in the lower layer. The transmission layer gear 231 in the transmission layer 203 is further engaged with the long column type gear 232, and the built-in gear 230 obtains power from the motor 211 by engaging with the long column type gear 232, and finally drives the rotation of the water knife 101, so that the fluid injection range of the water knife 101 is increased, and sufficient pressure is generated in the lesion area to cut, peel and remove the lesion such as prostate hyperplasia, so as to achieve the purpose of eliminating the lesion tissue. The increased fluid injection range generated by the rotation of the water knife 101 makes the removal of the lesion more simple and complete, reduces the complexity of the operation and the operation time, and also reduces the pain and potential risk of the patient. In addition, the rotation of the water knife 101 adopts a gear engagement transmission mode, which has high transmission efficiency and compact structure, and the smooth movement of the water knife 101 can further reduce the risk of operation.

[0059] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, similar structure and embodiments can be designed without creative design, which should belong to the protection scope of the present application.

Claims

1. A medical water jet device, characterized in that The medical water jet device comprises: a water jet assembly, which comprises a water jet and an internal gear, the water jet being connected to the internal gear, wherein the water jet comprises a body and a fluid channel inside the body, the fluid channel extending along the axial direction of the body; a transmission assembly, which comprises a motor and a gear assembly, the motor driving the gear assembly to rotate, the gear assembly engaging with the internal gear to drive the water jet to rotate around the axial direction of the body; the medical water jet device further comprises an endoscope assembly and a guide piece; the guide piece comprises a water jet channel, the water jet passing through the water jet channel, the water jet channel being a groove structure extending along the length direction of the guide piece and penetrating through the guide piece; the water jet assembly further comprises a water return rod, the water return rod being a semi-arc structure, the water return rod being matched with the groove structure to cover the water jet, the water return rod being detachably installed to the guide piece; the water jet assembly and the endoscope assembly are assembled into an execution structure through the guide piece.

2. The medical water jet device according to claim 1, characterized in that the guide piece comprises an endoscope channel, the water jet channel and the endoscope channel not interfering with each other, the endoscope assembly passing through the endoscope channel.

3. The medical water jet device according to claim 2, characterized in that the endoscope channel is a through hole extending along the length direction of the guide piece and penetrating through the guide piece.

4. The medical water jet device according to claim 3, characterized in that the medical water jet device further comprises a tower joint, the proximal end of the water return rod being connected to a return pipe through the tower joint, wherein the return pipe is connected to a peristaltic pump.

5. The medical water jet device according to claim 1, characterized in that the endoscope assembly comprises a carbon fiber tube, a flexible joint and an endoscope, the endoscope being connected to the end of the flexible joint, the flexible joint being connected to the carbon fiber tube and located between the end of the carbon fiber tube and the endoscope.

6. The medical water jet device according to claim 5, characterized in that the endoscope assembly further comprises a steel wire, one end of the steel wire passing through the inside of the carbon fiber tube and being connected to the flexible joint.

7. The medical water jet device according to any one of claims 1 to 6, characterized in that the water jet further comprises a head, the head being located at the end of the body, the internal gear being nested outside the water jet and located at the end opposite to the head.

8. The medical water jet device according to any one of claims 1 to 6, characterized in that the transmission assembly comprises a motor control layer and a transmission layer, wherein the motor is located in the motor control layer, the internal gear is located in the transmission layer, the gear assembly comprises a coupling, a control layer gear, a transmission layer gear and a long column gear, wherein the coupling and the control layer gear are located in the motor control layer, the transmission layer gear and the long column gear are located in the transmission layer, the motor is connected to the control layer gear through the coupling, the control layer gear engages with the transmission layer gear, the transmission layer gear engages with the long column gear, and the long column gear engages with the internal gear.

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