Medical water jet instruments and medical water jet systems

Abstract

The present disclosure provides a medical water jet instrument and a medical water jet system. The medical water jet instrument comprises an outer tube, a nozzle, a nozzle and a fluid driving device. The nozzle extends through the outer tube and is configured to input medical liquid at the proximal end. There is a gap between the outer wall of the nozzle and the inner wall of the outer tube. The nozzle is fixed at the distal end of the nozzle and is configured to output medical liquid. The fluid driving device comprises a fluid inlet, a moving part, a cavity and a shell surrounding the cavity, at least part of the moving part is built into the cavity, the fluid inlet is for fluid to flow in and is connected with the cavity so that the fluid flows into the cavity, the moving part is connected to the nozzle and the moving part is driven to move by the fluid flowing in the cavity, driving the nozzle to rotate or swing. The medical water jet instrument disclosed in the present disclosure drives the nozzle in the outer tube to move by a fluid driving method, which can not only realize automatic scanning, but also has the advantages of light weight, low cost, small size, low noise and no need for electrical connection.

Description

Technical Field

[0001] The present invention relates to a medical water jet instrument and a medical water jet system. Background Art

[0002] Current treatments for liver cancer include surgery, local ablation, transcatheter arterial chemoembolization and radiotherapy. Surgery is still the preferred method for treating liver cancer.

[0003] For example, the methods commonly used in surgical treatment of liver interruption include: first, separation of liver parenchyma and preservation of blood vessels, such as CUSA and water knife; second, separation of liver parenchyma and simultaneous sealing and cutting of blood vessels and bile ducts, such as ultrasonic scalpel, stapler and Ligasure; third, coagulation of the liver parenchyma resection surface and removal with a scalpel, such as Habib.

[0004] As the field of medical surgery develops towards minimally invasive and sophisticated treatment, it is imperative to innovate existing medical technologies because none of the many liver resection methods can fully meet the surgical needs of liver resection, effectively control postoperative complications, and improve the five-year survival rate after surgery. Summary of the invention

[0005] At least one embodiment of the present disclosure provides a medical water jet instrument, including an outer tube, a nozzle, a nozzle and a fluid driving device. The nozzle extends through the outer tube and is configured to input medical liquid at the proximal end, and a gap is provided between the outer wall of the nozzle and the inner wall of the outer tube. The nozzle is disposed at the distal end of the nozzle and is configured to output the medical liquid. The fluid driving device includes a fluid inlet, a fluid outlet, a moving part, a cavity and a shell surrounding the cavity. The fluid outlet is connected to the cavity and the fluid outlet is configured to allow fluid to be discharged from the cavity. At least a portion of the moving part is built into the cavity, the fluid inlet is configured to allow fluid to flow in, and the fluid inlet is connected to the cavity so that fluid flows into the cavity, the moving part is connected to the nozzle, and the moving part is configured to drive the nozzle to rotate or swing around the central axis of the nozzle through the fluid flowing in the cavity.

[0006] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the moving part includes a rotating member, which is disposed in a cavity and is configured to rotate by being driven by a fluid flowing in the cavity, thereby driving the nozzle to rotate around the central axis of the nozzle.

[0007] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the rotating part includes a rotor and a rotor blade group, the nozzle extends through the through hole of the rotor and is fixedly connected to the rotor, the rotor blade group is connected to the rotor and the rotor blade group is configured to be driven to rotate by the fluid flowing in the cavity, driving the rotor to rotate around the central axis of the nozzle to drive the nozzle to rotate.

[0008] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the rotor blade assembly includes a plurality of rotor blades arranged along the circumferential direction of the rotor.

[0009] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, a plurality of rotor blades of the rotor blade assembly are fixedly connected to the rotor.

[0010] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the inlet direction of the fluid inlet and / or the outlet direction of the fluid outlet are perpendicular to the axial direction of the rotor, and the extension direction of the multiple rotor blades is not perpendicular to the axial direction of the rotor.

[0011] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the rotor is provided with a plurality of slots extending radially along the rotor, a plurality of rotor blades are respectively arranged in the slots and are configured to be radially slidable in the slots, and the rotor is eccentrically arranged in the cavity.

[0012] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the diameter of the cavity is greater than the diameter of the rotor, and the center position of the rotor is not coaxial with the center position of the cavity.

[0013] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the inlet direction of the fluid inlet and / or the outlet direction of the fluid outlet are parallel to the axial direction of the rotor, and the extension direction of the multiple rotor blades does not coincide with the axial direction of the rotor.

[0014] For example, in a medical water jet instrument provided by at least one embodiment of the present disclosure, the fluid drive device further includes a partition plate located in the cavity, and the partition plate is configured to separate the cavity into a first cavity and a second cavity. The first cavity and the second cavity are respectively located on both sides of the partition plate along the axial direction of the rotor, the first cavity is connected to the fluid inlet, the second cavity is connected to the fluid outlet, and the rotor and the rotor blade group are located in the second cavity. The partition plate is provided with at least one guide hole in the axial direction parallel to the rotor, and the second cavity is connected to the first cavity through at least one guide hole, so that the fluid flows from the first cavity to the second cavity through at least one guide hole.

[0015] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the partition plate is integrally formed with the shell.

[0016] For example, in a medical waterjet instrument provided in at least one embodiment of the present disclosure, the rotating member includes one or more rotor blade groups, the fluid driving device also includes at least one stator blade group, each stator blade group includes a plurality of stator blades arranged along the circumference of the rotor, each rotor blade group includes a plurality of rotor blades arranged along the circumference of the rotor, and the stator blade group and the rotor blade group are arranged alternately along the axial direction of the rotor, the stator blade group is arranged in the cavity, and the stator blade group is fixedly connected to the inner side wall of the shell in the radial direction of the rotor. The number and position of the plurality of stator blades of the stator blade group correspond to the number and position of the plurality of rotor blades of the rotor blade group, wherein the width direction of the rotor blade and the stator blade is along the radial direction of the rotor, and the rotor blade and the stator blade are bent along the circumference of the rotor so that the length direction of the rotor blade and the stator blade is not parallel to the axial direction of the rotor. The blade bending direction of the rotor blade is opposite to the blade bending direction of the stator blade, a stator groove is formed between two adjacent stator blades of the stator blade group, and a rotor groove is formed between two adjacent rotor blades of the rotor blade group.

[0017] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the rotating part includes a rotor and a driving gear pair, the driving gear pair includes two meshing gears, the rotor includes two rotating shafts corresponding to the two gears one by one and the gears are fixed on the rotating shafts, the nozzle extends through the through hole of any one of the two rotating shafts and is fixedly connected, and the driving gear pair is configured to be driven to rotate by the fluid flowing in the cavity, driving the two rotating shafts of the rotor to rotate to drive the nozzle to rotate around the central axis of the nozzle.

[0018] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the moving part includes a cam shaft and a cam assembly. The axial direction of the cam shaft is along the radial direction of the nozzle, and the two axial ends of the cam shaft are respectively connected to the housing. The cam assembly includes an eccentric cam and blades arranged around the periphery of the eccentric cam. The eccentric cam is sleeved on the outer side of the cam shaft and is eccentrically arranged relative to the cam shaft. The eccentric cam abuts against the first side of the nozzle in the first direction, and the first direction is perpendicular to the axial direction of the cam shaft and perpendicular to the axial direction of the nozzle. The blades are configured to be driven to rotate by the fluid flowing in the cavity, driving the eccentric cam to rotate around the cam shaft, so that the eccentric cam drives the nozzle to swing back and forth in the first direction.

[0019] For example, in a medical water jet instrument provided by at least one embodiment of the present disclosure, the fluid driving device further comprises a nozzle shaft, the axial direction of the nozzle shaft is along the radial direction of the nozzle and parallel to the axial direction of the cam shaft, the two axial ends of the nozzle shaft are respectively connected to the housing, the nozzle shaft is configured to be rotatable around the axial direction of the nozzle shaft, and the nozzle shaft is located on one side of the cam shaft along the axial direction of the nozzle. The nozzle shaft comprises a first section shaft, an intermediate ring, and a second section shaft sequentially connected in the axial direction of the nozzle shaft, and the intermediate ring is configured for the nozzle to extend through.

[0020] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the fluid driving device also includes a nozzle reed, at least a portion of which is configured to abut against a second side of the nozzle in the first direction so that the nozzle is clamped between the nozzle reed and the eccentric cam in the first direction, and the second side and the first side are respectively opposite sides of the nozzle in the first direction.

[0021] For example, in a medical water jet instrument provided by at least one embodiment of the present disclosure, the nozzle spring includes a first part and a second part connected to each other. The first part is in contact with the inner wall of the housing on one side in the first direction, and the first part extends from the end connected to the second part to the side away from the fluid inlet in the axial direction of the nozzle. The second part includes a first strip, a second strip, and a third strip arranged in sequence in the axial direction of the cam shaft. The second strip is configured to abut against the second side of the nozzle in the first direction and the second strip extends from the end connected to the first part to the side away from the fluid inlet in the axial direction of the nozzle, and the elastic force generated by the compression deformation of the second strip causes the nozzle to abut against the eccentric cam. The first strip and the third strip extend from the end connected to the first part to the side away from the fluid inlet, respectively, and the extension directions of the first strip and the third strip are respectively at an acute angle to the extension direction of the second strip, so as to guide the fluid to the first side, thereby driving the eccentric cam to rotate.

[0022] For example, at least one embodiment of the present disclosure provides a medical water jet instrument further comprising a suction tube, wherein the suction tube is configured to be provided with negative pressure by a negative pressure suction machine. The gap between the outer wall of the nozzle and the inner wall of the outer tube serves as a suction channel, the fluid inlet is located at the distal end of the suction channel, the distal end of the cavity is connected to the suction channel, the fluid outlet is located at the proximal end of the cavity, and the suction tube is connected to the proximal end of the fluid outlet.

[0023] For example, a medical water jet instrument provided by at least one embodiment of the present disclosure also includes a liquid supply connecting pipe, one end of which is connected to the proximal end of the nozzle, and the other end of the liquid supply connecting pipe is configured to be connected to the output end of the pressure pump to input medical liquid.

[0024] For example, a medical water jet instrument provided in at least one embodiment of the present disclosure also includes a handle, a fluid drive device is disposed inside the handle, and the handle is sleeved on the outside of the proximal end of the outer tube and fixedly connected to the proximal end of the outer tube.

[0025] At least one embodiment of the present disclosure further provides a medical water jet system, comprising a liquid supply unit, a pressure pump, and any of the medical water jet instruments described above. The liquid supply unit is configured to provide medical liquid. The pressure pump is configured to apply pressure to the medical liquid to input the medical liquid into the nozzle.

[0026] Compared with the prior art, the beneficial effects of at least one embodiment of the present invention include at least: the medical water jet of the present invention automatically drives the movement of the nozzle limited in the outer tube through a fluid-driven method, which can replace the rapid shaking action of the doctor when manually operating the medical water jet, and realize the automatic scanning of the medical water jet, which greatly reduces the difficulty of operation, improves the surgical efficiency of water jet selective separation, and improves the effect of tissue selective separation and the accuracy of surgery. In addition, the medical water jet of the present invention adopts a fluid-driven method and has the advantages of light weight, low cost, small size, low noise and no need for electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A cross-sectional view of a medical water jet instrument provided for some embodiments of the present disclosure;

[0029] Figure 2 A schematic diagram of the reciprocating swing of the nozzle of a medical water jet device provided in some embodiments of the present disclosure;

[0030] Figure 3A A front cross-sectional view of a medical water jet instrument provided for some embodiments of the present disclosure;

[0031] Figure 3B Some embodiments of the present disclosure provide Figure 3A A top cross-sectional view of a medical water jet instrument;

[0032] Figure 3C Some embodiments of the present disclosure provide Figure 3A A partial enlarged view of

[0033] Figure 3D Some embodiments of the present disclosure provide Figure 3A A partial stereogram of

[0034] Figure 3E A perspective view of a nozzle reed provided for some embodiments of the present disclosure;

[0035] Figure 4 A schematic diagram of the rotation of the nozzle of a medical water jet device provided in some embodiments of the present disclosure;

[0036] Figure 5A-Figure 5B A schematic diagram of a nozzle rotating inside an outer tube provided in some embodiments of the present disclosure;

[0037] Figure 6-6A A schematic diagram of a blade-type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure;

[0038] Figure 7-Figure 7A A schematic diagram of a sliding vane type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure;

[0039] Figure 8-Figure 8A A schematic diagram of an axial flow fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure;

[0040] Figure 9-9A A schematic diagram of a turbine-type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure;

[0041] Figure 10-10A A schematic diagram of a gear-type fluid drive device for driving a nozzle to rotate provided in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present disclosure explicitly define such meanings.

[0044] The words "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections or communication connections, whether direct or indirect. Flowcharts are used in the embodiments of the present disclosure to illustrate the steps of the method according to the embodiments of the present disclosure. It should be understood that the previous or subsequent steps are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously, unless the embodiments of the present disclosure clearly define. At the same time, other operations can also be added to these processes, or one or more steps can be removed from these processes.

[0045] The liver is an organ with a very complex structure and rich blood supply. The liver mainly consists of two different types of tissues, one is the liver parenchyma and the other is the luminal tissue. The liver parenchyma is soft and the luminal tissue is tough. The mechanical strength of these two tissues is very different. Therefore, under the impact of the jet of the medical water jet instrument, the liver parenchyma is broken and fragmented and removed, while the luminal tissue remains intact and is retained, so that the medical water jet instrument can achieve the selective separation function.

[0046] The ideal liver resection method should have the following characteristics: fast speed, no thermal damage, protection of the lumen, fine separation, minimal blood loss, easy operation under laparoscopy, not prone to bile leakage and effusion, low cost, and ideal operating environment.

[0047] The inventors of the present disclosure have found that the application of medical waterjet instrument technology in the field of liver amputation has great potential. For example, when working, the medical waterjet instrument can complete the cutting or removal of liver parenchyma in a cutting band with a certain width and length, and at the same time retain and expose luminal tissue. This method does not cause thermal damage to luminal tissue and parenchymal tissue. Closing and disconnection operations can also protect luminal tissue and reduce surgical risks when luminal tissue is clearly visible. There is very little bleeding during the process, and it is not easy to cause bile leakage and effusion. However, the slow speed of medical waterjet instruments and the disadvantages of difficult operation under laparoscopy are pain points that most doctors find difficult to accept and urgently need to be solved.

[0048] In this regard, at least one embodiment of the present disclosure provides a medical water jet instrument, including an outer tube, a nozzle, a nozzle and a fluid driving device. The nozzle extends through the outer tube and is configured to input medical liquid at the proximal end, and a gap is provided between the outer wall of the nozzle and the inner wall of the outer tube. The nozzle is disposed at the distal end of the nozzle and is configured to output the medical liquid. The fluid driving device includes a fluid inlet, a moving part, a cavity and a shell surrounding the cavity. At least a portion of the moving part is built into the cavity, the fluid inlet is configured to allow fluid to flow in and the fluid inlet is connected to the cavity so that the fluid flows into the cavity, the moving part is connected to the nozzle and the moving part is configured to be driven to move by the fluid flowing in the cavity, and the moving part drives the nozzle to rotate or swing.

[0049] The medical water jet instrument of the above-mentioned embodiment of the present invention automatically drives the movement of the nozzle confined in the outer tube by fluid drive, such as swinging or rotating, so that the nozzle of the medical water jet instrument produces a rapid scanning movement, which is used to replace the rapid shaking action when the doctor manually operates the medical water jet instrument, and realizes the automatic scanning of the medical water jet instrument. It not only greatly reduces the difficulty of operation, improves the surgical efficiency of water jet selective separation, and improves the effect of tissue selective separation and the accuracy of surgery, but also the medical water jet instrument has the advantages of light weight, low cost, small size, low noise and no need for electrical connection.

[0050] The embodiments and examples of the present disclosure are described in detail below with reference to the accompanying drawings.

[0051] For the convenience of description, the embodiments of the present disclosure are Figure 1 One axial end of the outer tube 300 of the medical water jet instrument 1000 is recorded as the proximal end and the other axial end of the outer tube 300 is recorded as the distal end. For example, the proximal end of the outer tube 300 is the side close to the operator, and the distal end of the outer tube 300 is the side away from the operator. At least one embodiment of the present disclosure regards the side close to the operator as the proximal end or the proximal side, and the side away from the operator as the distal end or the distal side. It should be noted that the distal end and the proximal end of the embodiments of the present disclosure are relative positions. For example, they represent the two opposite sides of some components themselves, or they represent the two opposite sides in a certain direction, that is, the proximal end of the embodiments of the present disclosure represents one side, and the distal end represents the other side opposite to the proximal end.

[0052] For the sake of clarity and conciseness of this article, the following mainly uses the flexible tissue as liver parenchymal tissue and the elastic tissue as luminal tissue as an example for explanation, but the embodiments of the present disclosure do not limit the types of applicable flexible tissues and elastic tissues, that is, the present disclosure can also be applied to other biological tissues with similar needs and characteristics, such as other human organs (such as lungs, kidneys, spleen, etc.) corresponding to parenchymal tissues and luminal tissues (such as blood vessels, bile ducts, ureters, bronchi, etc.), which can be determined according to actual conditions, and the embodiments of the present disclosure are not limited to this.

[0053] Figure 1 A cross-sectional view of a medical water jet instrument provided for some embodiments of the present disclosure.

[0054] For example, Figure 1 As shown, at least one embodiment of the present disclosure provides a medical water jet instrument 1000 comprising a nozzle 100, a nozzle 200, an outer tube 300 and a fluid driving device 400. The nozzle 200 extends through the outer tube 300 and is configured to input medical liquid at the proximal end. The nozzle 200 is used for the circulation of the medical liquid. There is a gap between the outer wall of the nozzle 200 and the inner wall of the outer tube 300. The nozzle 200 can also be called an inner tube.

[0055] For example, Figure 1 As shown, the fluid driving device 400 includes a fluid inlet 410, a moving part 420, a cavity 430, and a housing 440 surrounding the cavity 430. At least a portion of the moving part 420 is built into the cavity 430. The fluid inlet 410 is configured to allow fluid to flow in, and the fluid inlet 410 is connected to the cavity 430 so that the fluid flows into the cavity 430. The moving part 420 is connected to the nozzle 200, and the moving part 420 is configured to be driven to move by the fluid flowing in the cavity 430, so as to drive the nozzle 200 to move. For example, the following Figure 3A-3E In the example, the moving part 420 drives the nozzle 200 to swing back and forth, or Figure 6-Figure 10 In the example, the moving part 420 drives the nozzle 200 to rotate around the central axis of the nozzle 200, that is, to rotate on its own.

[0056] In some examples, the fluid flowing into the fluid inlet 410 may be gas or liquid.

[0057] For example, Figure 1 As shown, the fluid driving device 400 further includes a fluid outlet 450 , which is in communication with the cavity 430 , and the fluid outlet 450 is configured to allow the fluid to be discharged from the cavity 430 .

[0058] For example, Figure 1 As shown, the nozzle 100 is disposed at the distal end of the nozzle tube 200 and is configured to spray medical liquids. For example, one or more nozzle holes opened on the nozzle 100 generate a high-pressure jet of the medical liquid, and the jet is used to achieve selective separation of, for example, liver parenchyma and, for example, blood vessels and bile ducts in the body.

[0059] In some examples, the inner diameter of the outer tube 300 is greater than the outer diameter of the nozzle 120. For example, the inner diameter of the nozzle 200 is about 1.5 mm to 5 mm, the outer diameter of the nozzle 200 is about 2 mm to 6 mm, and the diameter of the nozzle hole of the nozzle 200 is about 0.05 mm to 0.15 mm. For example, the jet velocity of the medical liquid ejected from the nozzle 100 is 50 m / s to 100 m / s. This is merely exemplary and is not a limitation of the present disclosure.

[0060] For example, the medical water jet instrument 1000 is a disposable surgical instrument that can be operated by a doctor with one hand.

[0061] In some examples, the medical water jet instrument 1000 may further include a handle 500, the driving device 400 is disposed in the handle 500, and the handle 500 is sleeved on the outside of the proximal end of the outer tube 300 and fixedly connected to the proximal end of the outer tube 300. It should be noted that this is merely exemplary and is not a limitation of the present disclosure. For example, in some other embodiments, the driving device 400 may also be located on the outside of the handle 500, which is not the focus of the present disclosure and will not be described here.

[0062] In some examples, the medical waterjet instrument 1000 further includes a liquid supply connection pipe 620, for example, the liquid supply connection pipe 620 is a high-pressure hose, the first end of the liquid supply connection pipe 620 is connected to the proximal end of the nozzle 200, and the second end of the liquid supply connection pipe 620 is connected to the output end of the pressure pump (not shown). The pressure pump can be used to apply pressure to the medical liquid supplied by the liquid supply unit (not shown). The nozzle 200 has a space for the circulation of the medical liquid. Under the pressure of the pressure pump 300, the medical liquid can flow into the nozzle 200 through the liquid supply connection pipe 620, and the medical liquid is then ejected from the nozzle hole of the nozzle 100 through the inner cavity of the nozzle 200, and the formed water jet can efficiently complete the selective separation of flexible tissue and elastic tissue. For example, the medical liquid can include physiological saline. This is only exemplary and is not a limitation of the present disclosure.

[0063] In some examples, the high-pressure jet ejected by the medical water jet instrument 1000 sequentially sweeps across the cutting zone area in a Z-shaped path to complete the selective separation of the flexible tissue and elastic tissue within the entire cutting zone, thereby facilitating the doctor to perform the next step of precisely coagulating the blood vessels.

[0064] In some examples, the fluid driving device 400 drives the nozzle 200 to move by driving the nozzle 200 to move the distal end of the nozzle 200, so that the nozzle 100 fixed at the distal end of the nozzle 200 moves accordingly, that is, the movement of the nozzle 100 is consistent with the movement of the distal end of the nozzle 200. For example, the nozzle 200 rotates or reciprocates under the driving action of the fluid driving device 400, and the rotation or swing is transmitted to the nozzle 100 at the distal end of the nozzle 200, so that the nozzle 100 swings or rotates accordingly, and the rotating or swinging nozzle 100 causes the high-pressure jet ejected from its nozzle hole to achieve automatic scanning.

[0065] In some examples, the handle 500 is configured to be driven by an external drive source to move along the direction of the central axis of the outer tube 300, such as longitudinal linear movement, and the fluid drive device 400 drives the nozzle 200 to rotate or reciprocate around the central axis of the nozzle 200 to achieve lateral reciprocating motion. For example, the external drive source can be manually operated by a doctor. This is only exemplary and is not a limitation of the present disclosure. For example, the handle 500 can also be driven by automated driving in other cases, which will not be repeated here.

[0066] In this way, the medical water jet instrument of the embodiment disclosed in the present invention can not only realize a Z-shaped scanning path, realize full coverage of the cutting band, and effectively complete selective separation, but also realize the lateral scanning movement of the nozzle on the nozzle through the fluid drive device, which replaces the high-frequency shaking action when the doctor manually operates the medical water jet instrument, so that the doctor can only manually complete the slow longitudinal linear movement, simplifying the operation, improving the surgical efficiency of selective separation, improving the surgical effect and accuracy, and avoiding the jet staying in a certain position for too long and causing damage to tissues such as blood vessels. In addition, the fluid drive device has the advantages of light weight, low cost, small size and low noise while realizing automated scanning. Furthermore, since manual lateral swing is not required when using the medical water jet instrument, the outer tube can have no lateral relative movement with the liver in the cutting edge slit, eliminating the risk of the blood vessel being pulled and broken after the outer tube collides with the side wall of the tissue cutting edge.

[0067] As mentioned above, when the nozzle 100 on the nozzle 200 adopts a Z-shaped total path to achieve selective separation of tissues, the total path can be decomposed into reciprocating motion and linear motion, such as the above-mentioned transverse reciprocating motion and longitudinal linear motion. For example, the transverse reciprocating motion is driven by the fluid drive device 400, and the longitudinal linear motion can be manually completed by the doctor, thereby avoiding the technical problem that the medical water jet instrument under the laparoscope cannot achieve accurate and fast transverse scanning motion, which seriously affects the realization of the laparoscopic water jet selective separation function. It should be noted that the above-mentioned transverse and longitudinal directions are relative positions, indicating two perpendicular directions, which can be determined according to the position of the tissue to be selectively separated, and will not be repeated here.

[0068] In some examples, the longitudinal linear motion can be carried out along the cutting edge with a safe distance from the tissue to be selectively separated, which can be planned and manually controlled by the doctor. The transverse reciprocating motion can also be called transverse scanning motion, which can make the cutting edge band have a sufficient width for subsequent treatment of the blood vessel. The width of the cutting band is generated by the transverse scanning motion of the high-pressure jet of the nozzle of the medical water jet instrument, that is, the width of the cutting band is equal to the transverse distance of the scanning motion.

[0069] It should be noted that the above embodiments of the present disclosure Figure 1 The medical water jet device 1000 is illustrated by taking the solution that can drive the nozzle 200 to swing back and forth as an example, but this is only an illustration and is not a limitation of the embodiments of the present disclosure. Figure 1 The described content is applicable to driving the nozzle 200 to swing, and is also applicable to driving the nozzle 200 to rotate around the central axis of the nozzle 200. Those skilled in the art should understand the technical solution of the present disclosure in conjunction with the text of the above embodiments.

[0070] In some examples, the lateral reciprocating motion is a lateral reciprocating linear motion, such as Figure 2 The schematic diagram of the reciprocating oscillation of the nozzle of the medical water jet instrument is shown.

[0071] For example, Figure 2 As shown, the nozzle 200 is inside the outer tube 300. The solid line circle on the left and the dashed line circle on the right inside the outer tube 300 respectively represent the possible positions of the nozzle 100 at the far end of the nozzle 200 at two movement moments. The dot-dash line and the arrow represent the scanning path and movement direction of the nozzle 100. "M" can be used to represent the direction of the nozzle 100 itself. Figure 2 The direction of the nozzle 100 itself is not deflected, that is, the nozzle 100 does not rotate.

[0072] Figure 3A A front cross-sectional view of a medical water jet instrument provided in accordance with some embodiments of the present disclosure. Figure 3B Some embodiments of the present disclosure provide Figure 3A A top cross-sectional view of a medical water jet instrument. Figure 3C Some embodiments of the present disclosure provide Figure 3A A partial enlarged view of . Figure 3D Some embodiments of the present disclosure provide Figure 3A A partial stereogram of . Figure 3E A three-dimensional view of a nozzle reed provided for some embodiments of the present disclosure.

[0073] For example, Figure 3A to Figure 3E As shown, the moving part 420 of the fluid driving device 400 includes a cam shaft 710 and a cam assembly 720 . The cam assembly 720 includes an eccentric cam 721 and a blade arranged around the periphery of the eccentric cam 721 . The blade can be called a cam blade 722 .

[0074] For example, in Figure 3A to Figure 3E In the example, the axial direction of the cam shaft 710 is along a radial direction of the nozzle 200, and the axial ends of the cam shaft 710 are respectively connected to the housing 440. For example, the axial direction of the cam shaft 710 is along Figure 3AThe eccentric cam 721 is sleeved on the outer side of the cam shaft 710 and is eccentrically arranged relative to the cam shaft 710. The eccentric cam 721 can rotate around the cam shaft 710. The eccentric cam 721 abuts against a first side of the nozzle 200 in a first direction, and the first direction is perpendicular to the axial direction of the cam shaft 710 and the axial direction of the nozzle 200. For example, the first direction is Figure 3A The cam blade 722 is configured to be driven by the fluid flowing in the cavity 430 to rotate the eccentric cam 721 around the cam shaft 710, so that the eccentric cam 721 drives the nozzle 200 to swing back and forth in the first direction.

[0075] For example, Figure 3A to Figure 3C As shown, when the eccentric cam 721 rotates upward, the proximal end of the nozzle 200 moves upward, and the distal end of the nozzle 200 moves downward. Conversely, when the eccentric cam 721 rotates downward, the distal end of the nozzle 200 moves upward, and the proximal end of the nozzle 200 moves downward. Therefore, when the eccentric cam 721 and the cam blade 722 continue to rotate under the action of the fluid flowing in the cavity 430, the spray head 100 on the nozzle 200 will reciprocate up and down.

[0076] The embodiment of the present disclosure realizes the reciprocating swinging motion of the nozzle through the fluid driving device, thereby realizing a Z-shaped scanning path, which can effectively complete the selective separation, and the fluid driving device has the advantages of light weight, low cost, small size and low noise.

[0077] It should be noted that the implementation of the present disclosure introduces the orientation of the drawings, such as up, down, left and right directions, which is only for the convenience of expression and to help understanding, and does not limit the embodiments of the present disclosure. The orientations of the embodiments of the present disclosure are all relative positions and are not actual orientations.

[0078] For example, Figure 3A As shown, the distal end of the shell 440 of the fluid driving device 400 is connected to the outer tube 300 through the adapter 910, and the first end of the liquid supply connecting pipe 620 is connected to the proximal end of the shell 440 of the fluid driving device 400 through the adapter 920, so that the channel can be kept well sealed.

[0079] In some examples, the fluid driving device 400 further includes a nozzle shaft 490, the axial direction of the nozzle shaft 490 is along the radial direction of the nozzle 200 and parallel to the axial direction of the cam shaft. Figure 3AAs shown in the direction perpendicular to the paper, both ends of the nozzle shaft 490 are connected to the housing 440, and the nozzle shaft 490 is configured to be rotatable around the axial direction of the nozzle shaft 490. The nozzle shaft 490 is located on one side of the cam shaft 710 along the axial direction of the nozzle 200.

[0080] It should be noted that the connection between the two axial ends of the nozzle shaft 490 and the housing 440 may be a movable connection or a fixed connection, as long as it does not affect the rotation of the nozzle shaft 490 itself. For example, the two axial ends of the nozzle shaft 490 are inserted into the positioning holes provided on the housing 440 to retain the rotation degree of the nozzle shaft 490. For another example, the two axial ends of the nozzle shaft 490 are fixedly connected to the rotatable part on the housing 440 so that the nozzle shaft 490 can rotate around the axial direction of the nozzle shaft 490. Since this is not the focus of the embodiment of the present disclosure, it will not be repeated.

[0081] For example, both ends of the nozzle shaft 490 in the axial direction are fixedly connected to the housing 440 by being fixedly connected to the adapter 910. This is merely exemplary and is not a limitation of the present disclosure.

[0082] As mentioned above, the nozzle shaft 490 serves as a positioning fulcrum, and the nozzle 200 can swing up and down around the nozzle shaft 490 at the fulcrum. For example, when one side of the nozzle shaft 490 moves upward, the other side of the nozzle shaft 490 can move downward stably, or, for example, when one side of the nozzle shaft 490 moves downward, the other side of the nozzle shaft 490 can move upward stably. In this way, the embodiment of the present disclosure can keep the nozzle 100 on the nozzle 200 smoothly and stably reciprocating. It should be noted that the nozzle shaft 490 can be located on the left side of the cam shaft 710, or on the right side of the cam shaft 710, and the embodiment of the present disclosure does not limit this.

[0083] For example, Figure 3D As shown, the nozzle shaft 490 includes a first shaft section 491, an intermediate ring 493, and a second shaft section 492 which are sequentially connected in the axial direction of the nozzle shaft 490. The axial direction of the intermediate ring 493 is parallel to or coaxial with the axial direction of the nozzle 200, and the intermediate ring 493 is configured to allow the nozzle 200 to extend through. Therefore, the embodiment of the present disclosure can smoothly and stably realize the reciprocating swing of the nozzle head 100 on the nozzle 200 through the nozzle shaft 490, and the setting of the nozzle shaft 490 will not damage the surface of the nozzle 200 and affect the sealing performance of the nozzle 200.

[0084] For example, in Figure 3A to Figure 3EIn the example, the cavity 430 can be a positive pressure or a negative pressure, and the embodiments of the present disclosure are not limited to this. The embodiments of the present disclosure also do not limit the volume size and shape of the cavity 430. As long as the fluid in the cavity 430 can drive the cam assembly 720 to move, it will not be repeated here.

[0085] In some examples, when the cavity 430 is a positive pressure cavity, the fluid inlet 410 is located at the distal side of the cavity 430 and the fluid outlet 450 is located at the proximal side of the cavity 430, or the fluid inlet 410 is located at the proximal side of the cavity 430 and the fluid outlet 450 is located at the distal side of the cavity, and the embodiments of the present disclosure do not limit this. For example, when the cavity 430 is a positive pressure cavity, not only can a separate pump and its circuit be set to provide fluid for the fluid inlet 410 and the cavity 430 (that is, the driving fluid and the medical liquid provided by the pressure pump connected to the liquid supply connection pipe 620 are independent, and the driving fluid does not come from the medical liquid provided by the pressure pump), but also the fluid can be obtained by sharing the pressure pump connected to the liquid supply connection pipe 620 (that is, the driving fluid comes from the medical liquid provided by the pressure pump connected to the liquid supply connection pipe 620). The embodiments of the present disclosure do not limit the material and source of the fluid.

[0086] In other examples, when the cavity 430 is a negative pressure cavity, the medical water jet instrument 1000 may further include a suction tube 610, such as Figure 3A As shown, the suction pipe 610 is configured to be provided with negative pressure by a negative pressure suction machine (not shown) so that the cavity 430 is a negative pressure cavity. The suction pipe 610 is connected to the proximal end of the cavity 430, and the distal end of the cavity 430 is connected to the suction channel. The negative pressure suction machine can also be connected to a waste liquid tank (not shown), and the gap between the outer wall of the nozzle 200 and the inner wall of the outer tube 300 serves as the suction channel.

[0087] In this way, the negative pressure provided by the negative pressure suction machine passes through the waste liquid tank, the suction tube 610, the adapter 920, the cavity 430, the adapter 910 and then reaches the outer tube 300, so that the port at the distal end of the outer tube 300 has a suction capacity, so that waste liquid or tissue debris can be sucked for discharge and collection, thereby avoiding affecting the selective separation effect of the medical water jet instrument. In the embodiment of the present disclosure, the sucked waste liquid or tissue debris can be used as a fluid to drive the cam assembly 720 in the cavity 430, and the fluid inlet 410 is a port located at the distal end of the suction channel, that is, the fluid inlet 410 is located on the distal side of the cavity 430. Correspondingly, the fluid outlet 450 is located at the proximal end of the cavity 430, and the suction tube 610 is connected to the proximal end of the fluid outlet 450, so that the waste liquid or tissue debris used as a fluid to drive the cam assembly 720 flows out from the fluid outlet 450 and is discharged through the suction tube 610 to the waste liquid tank for collection.

[0088] Therefore, the embodiments of the present disclosure can utilize the energy of the fluid in the above-mentioned suction channel (such as sucked waste liquid or tissue debris, etc.) during the negative pressure suction process, and convert it into mechanical energy to drive the cam assembly 720 in the cavity 430, thereby driving the nozzle 300 on the nozzle 200. In this way, the nozzle 300 can continuously swing up and down under the action of negative pressure suction, which can not only complete the discharge and collection of waste liquid or tissue debris to avoid adverse effects on the selective separation of the medical water jet instrument, but also simplify the structure of the entire medical system, save energy, reduce costs, and make the medical water jet instrument lighter and quieter.

[0089] It should be noted that the outer tube 300 of the embodiment of the present disclosure does not need to be shaken laterally, so that the outer tube 300 can be in a position that is more conducive to negative pressure suction in the horizontal direction and depth direction of the cutting edge slit, thereby improving the suction effect in the slit, which is significantly helpful for improving the exposure depth and work efficiency of selective separation of medical water jet instruments.

[0090] For example, Figure 3A to Figure 3E As shown, the fluid driving device 400 further includes a nozzle reed 480, at least a portion of which is configured to abut against a second side of the nozzle 200 in the first direction, the second side of the nozzle 200 in the first direction being a side opposite to the side where the eccentric cam 721 is located, for example Figure 3A The nozzle 200 is positioned above the nozzle 200 so that the nozzle 200 is clamped between the nozzle reed 480 and the eccentric cam 721 in the first direction. The second side of the first direction and the first side of the first direction are the two opposite sides of the nozzle in the first direction. In this way, the nozzle 200 is always clamped between the nozzle reed 480 and the eccentric cam 721 by contacting with the nozzle reed 480 and receiving the elastic pressure provided by the nozzle reed 480, that is, the nozzle 200 can always maintain contact with the eccentric cam 721, so that the reciprocating swing of the nozzle head 100 on the nozzle 200 can be continuously and smoothly realized.

[0091] For example, in Figure 3A to Figure 3E In the example of FIG. 4 , the nozzle reed 480 includes a first portion 481 and a second portion 482 connected to each other. The first portion 481 is in contact with the inner wall of the housing 440 on one side in the first direction, for example, the first portion 481 is in contact with the inner wall of the upper side of the housing 440. The first portion 481 extends along the axial direction of the nozzle 200, and the first portion 481 extends from the end connected to the second portion 482 in the axial direction of the nozzle 200 to the side away from the fluid inlet 410. For example, Figure 3D As shown, the first portion 481 extends rightward from one end connected to the second portion 482 .

[0092] For example, in Figure 3A to Figure 3EIn the example of FIG. 4 , the second portion 482 includes a first strip 482a, a second strip 482b, and a third strip 482c sequentially arranged in the axial direction of the cam shaft 710. The second strip 482b is configured to abut against the second side of the nozzle 200 in the first direction and the second strip 482b extends from the end connected to the first portion 481 to the side away from the fluid inlet 410 in the axial direction of the nozzle 200, for example, Figure 3C As shown, the second strip 482b extends rightward from one end connected to the first portion 481. In this way, the second strip 482b of the nozzle reed 480 can contact the nozzle 200 to provide elastic pressure to the nozzle 200, so that the nozzle 200 can always keep in contact with the eccentric cam 721, so that the elastic force generated by the compression deformation of the second strip 482b can make the nozzle 200 abut against the eccentric cam 721.

[0093] For example, Figure 3A to Figure 3E As shown, the first strip body 482a and the third strip body 482c respectively extend from one end connected to the first part 481 to the side away from the fluid inlet 410, and the extension directions of the first strip body 482a and the third strip body 482c are respectively at an acute angle to the extension direction of the second strip body 482b. For example, the first strip body 482a and the third strip body 482c both extend from one end connected to the first part 481 to the lower right, so that the fluid can be guided to the lower half of the cavity 430, thereby generating a larger flow rate and dynamic pressure, thereby forming an uneven incoming flow.

[0094] For example, Figure 3E As shown, the three strips (the first strip 482 a , the second strip 482 b , and the third strip 482 c ) of the second portion 482 of the nozzle reed 480 are connected to the first portion 481 via a rounded connecting portion Q.

[0095] Thus, in some embodiments of the present disclosure, after the fluid enters the housing 440 and sequentially passes through the nozzle reed 480 and the eccentric cam 721, it flows out of the housing 440. The second portion 482 of the nozzle reed 480 utilizes the rounded connecting portion and the acute angle guide portion (e.g. Figure 3E The first strip body 482a and the third strip body 482c in the cavity 430 push the uniform incoming flow to the first side in the first direction in the cavity 430, so that the flow velocity on the first side in the first direction is much greater than the flow velocity on the second side in the first direction, forming an uneven incoming flow. When the uneven incoming flow acts on the cam blade 722, the cam blade 722 rotates continuously due to the uneven force on the first side and the second side in the first direction.

[0096] In some examples, the lateral reciprocating motion is a lateral circular motion, such as Figure 4The schematic diagram of the rotation of the nozzle of the medical water jet instrument is shown.

[0097] For example, Figure 4 As shown, the nozzle 200 is inside the outer tube 300. The solid circle on the left and the dashed circle on the right inside the outer tube 300 respectively represent the possible positions of the nozzle 100 at the far end of the nozzle 200 at two movement moments. The dotted line and the arrow represent the scanning path and movement direction of the nozzle 100. "M" can be used to represent the direction of the nozzle 100 itself. For example, Figure 4 In the example, the nozzle 200 rotates around the central axis of the nozzle 200, that is, the direction of the nozzle head 300 itself has been deflected, and the distal end of the nozzle 200 revolves around the central axis of the outer tube 300, thereby realizing lateral reciprocating motion. When the nozzle 200 rotates, the nozzle head 100 moves accordingly along with the movement of the nozzle 200.

[0098] Figure 5A-Figure 5B A schematic diagram of a nozzle rotating inside an outer tube provided in some embodiments of the present disclosure, Figure 5A-Figure 5B They are Figure 4 A top view of the . Figure 5A and Figure 5B In FIG. 1 , the dotted line inside the outer tube 300 indicates the possible position of the nozzle 200 after the rotation.

[0099] In some examples, the nozzle 200 is configured to generate a curved arc as a whole and make the nozzle head 100 of the nozzle 200 close to the inner wall of the outer tube 300, such as Figure 5A and Figure 5B As shown, Figure 5A The nozzle 200 shown is more curved than Figure 5B The nozzle 200 shown has a large degree of curvature. The nozzle 200 has a degree of freedom of rotation in the outer tube 300, for example, the fluid drive device 400 drives the nozzle 200 to rotate around its own central axis. Due to the overall curvature of the nozzle 200, the rotation of the nozzle 200 will cause the motion trajectory of the distal end of the nozzle 200 to form a ring around the central axis of the outer tube 300, that is, the distal end of the nozzle 200 realizes orbital revolution around the central axis of the outer tube 300.

[0100] Therefore, the embodiment of the present disclosure can drive the nozzle 200 to rotate through the fluid driving device 400 to achieve the scanning width required for the high-pressure jet of the nozzle 100, and can allow the nozzle 200 to have a certain degree of bending. It has lower processing requirements for the nozzle 200 and the outer tube 300, has a wider range of applications, and has higher practical application value.

[0101] It should be noted that the embodiments of the present disclosure are not limited to the above-mentioned method of generating a bending arc through the nozzle 200 as a whole to realize the rotation and revolution of the nozzle head 100 on the nozzle 200. For example, the distal side of the nozzle 200 can be bent or the distal side of the nozzle 200 can be partially bent. As long as the distal side of the nozzle 200 can have two sections with different axes to enable the nozzle head 100 to rotate and revolution, it will not be repeated here.

[0102] Figure 6-6A A schematic diagram of a blade-type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure, Figure 6 This is a partial front view of the medical water jet instrument. Fig. 6A for Figure 6 Left section of the fluid drive device. Figure 7-Figure 7A A schematic diagram of a vane-type fluid drive device for driving a nozzle to rotate provided in some embodiments of the present disclosure, Figure 7 This is a partial front view of the medical water jet instrument. Fig. 7A for Figure 7 Left section of the fluid drive device. Figure 8-Figure 8A A schematic diagram of an axial flow fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure, Figure 8 This is the main cross-sectional view of the medical water jet instrument. Fig. 8A for Figure 8 A partial stereoscopic view of a fluid drive device. Figure 9-9A A schematic diagram of a turbine-type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure, Fig. 9 This is the main cross-sectional view of the medical water jet instrument. Fig.9A for Fig. 9 A three-dimensional diagram of a fluid drive device. Figure 10-10A A schematic diagram of a gear-type fluid driving device for driving a nozzle to rotate provided in some embodiments of the present disclosure, Fig.10 This is a schematic diagram of the disassembly of the parts of a medical water jet instrument. Fig. 10A for Fig.10 It should be noted that, unless otherwise specified, the rotation of each component or part described below refers to the rotation of each component or part around its own axis.

[0103] For example, Figure 6-6A , Figure 7-7A , Figure 8-8A , Figure 9-9A and Figure 10-10AAs shown, the moving part 420 of the fluid driving device 400 includes a rotating member 421, which is disposed in the cavity 430 and is configured to be driven to rotate by the fluid flowing in the cavity 430, thereby driving the nozzle 200 to rotate, for example, driving the nozzle 200 to rotate, so that the distal end of the nozzle 200 revolves around the central axis of the outer tube 300. For details, please refer to the above content, which will not be repeated here. In this way, the fluid driving device 400 of the embodiment of the present disclosure can realize the automatic scanning of the nozzle 200 of the medical water jet instrument, thereby realizing a Z-shaped scanning path, and can effectively complete selective separation. In addition, the medical water jet instrument using the fluid driving method also has the advantages of light weight, low cost, small size and low noise.

[0104] For example, Figure 6-Figure 10 The fluid driving device 400 in the example can be located in the handle 500, which is convenient for surgical operation. This is only exemplary and is not a limitation of the present disclosure.

[0105] For example, in Figure 6-Figure 10 In the example, the medical liquid is a high-pressure fluid, and the medical liquid can be provided with pressure by a pressure pump, and connected to the nozzle 200 via the liquid supply connection pipe 620 and the adapter 920, so that the medical liquid is ejected from the nozzle 100 on the nozzle 200 to form a jet. The adapter 920 can be called a high-pressure adapter, and the liquid supply connection pipe 620 can be a high-pressure hose. For example, the high-pressure hose can be fixed relative to the handle 500, and the nozzle 200 is driven by the fluid drive device 400 to rotate around its own axis, and the high-pressure adapter can play a dynamic sealing role.

[0106] For example, in Figure 6-Figure 10 In the example, the rotating member 421 of the fluid driving device 400 includes a rotor 510 and a rotor blade group 520, the nozzle 200 extends through the through hole of the rotor 510 and is fixedly connected to the rotor 510, the rotor blade group 520 is connected to the rotor 510 and the rotor blade group 520 is configured to be driven to rotate by the fluid flowing in the cavity 430, driving the rotor 510 to rotate, thereby driving the nozzle 200 to rotate. Therefore, the moving part 420 of the fluid driving device 400 of the present disclosure is designed as a rotating member 421 with blades, which is conducive to the rotation of the rotating member 421 driven by the fluid, thereby facilitating the rotation of the nozzle 200.

[0107] In some examples, such as Figure 6-Figure 9 As shown, the rotor blade assembly 520 includes a plurality of rotor blades 521 arranged along the circumference of the rotor 510. For example, Figure 6 , Figure 8 and Fig. 9 As shown, the plurality of rotor blades 521 of the rotor blade assembly 520 are fixedly connected to the rotor 510. For another example, Figure 7As shown, the plurality of rotor blades 521 of the rotor blade assembly 520 and the rotor 510 can slide relative to each other.

[0108] In some examples, the inlet direction of the fluid inlet 410 and / or the outlet direction of the fluid outlet 450 may be perpendicular to the axial direction of the rotor 520, and the extension direction of the plurality of rotor blades 521 is not perpendicular to the axial direction of the rotor 510. In this way, the rotor blades 521 of the rotating member 421 can obtain greater power and torque, which is conducive to the fluid driving the rotation of the rotating member 421, thereby facilitating the rotation of the nozzle 200, but this will also reduce the flow rate and pressure difference of the fluid to a certain extent. For example, Fig. 6A and Fig. 7A As shown, the inlet direction of the fluid inlet 410 and the outlet direction of the fluid outlet 450 are perpendicular to the axial direction of the rotor 520 .

[0109] In other examples, the inlet direction of the fluid inlet 410 and / or the outlet direction of the fluid outlet 450 may be parallel to the axial direction of the rotor 510, and the extension direction of the plurality of rotor blades 521 does not coincide with the axial direction of the rotor 510. Figure 8 and Fig. 9 As shown, the inlet direction of the fluid inlet 410 and the outlet direction of the fluid outlet 450 are parallel to the axial direction of the rotor 510. In this way, the flow resistance of the fluid is small, and the flow rate and pressure difference of the fluid will not be reduced.

[0110] It should be noted that the embodiments of the present disclosure do not limit the inlet direction of the fluid inlet 410 and the outlet direction of the fluid outlet 450. The above embodiments are merely exemplary and are not limitations of the present disclosure, that is, the inlet direction of the fluid inlet 410 and the outlet direction of the fluid outlet 450 in the embodiments of the present disclosure can be in any direction, as long as the fluid can smoothly flow into the cavity and the fluid can smoothly flow out of the cavity. For example, the fluid inlet 410 and the fluid outlet 450 can also be located on the opposite side of the orientation shown in the figure, respectively, and will not be exhaustively listed or repeated here. It should also be noted that the embodiments of the present disclosure do not limit the positions of the fluid inlet 410 and the fluid outlet 450 on the fluid drive device 400, and they can be located at any position on the fluid drive device, for example, they can be located on the end face or side face of the fluid drive device, etc., and will not be exhaustively listed or repeated here.

[0111] In some examples, such as Figure 6 and Fig. 6AAs shown, the fluid drive device 400 includes a fluid inlet 410, a fluid outlet 450, a rotating member 421, a cavity 430 and a housing 440. The rotating member 421 includes a rotor 510 and a rotor blade assembly 520. For example, the rotor 510 can be a rotating wheel. The multiple rotor blades 521 of the rotor blade assembly 520 are fixed in the grooves in the circumferential direction of the rotor 510 to achieve a fixed connection between the rotor 510 and the rotor blade assembly 520. For example, the rotor 510 can be integrally formed with the rotor blade assembly 520. Figure 6 and Fig. 6A In the example, the nozzle 200 extends through the central hole of the rotor 510 and is fixed to the central hole of the rotor 510. Thus, the fluid enters the cavity 430 of the fluid driving device 400 from the fluid inlet 410, and the fluid drives the rotor 510 and the rotor blades 521 of the rotating member 421 by its kinetic energy, thereby rotating the nozzle 200, so that the nozzle 100 can achieve automatic scanning action.

[0112] In some examples, such as Figure 7 and Fig. 7A As shown, the fluid driving device 400 includes a fluid inlet 410, a fluid outlet 450, a rotating member 421, a cavity 430 and a housing 440. The rotating member 421 includes a rotor 510 and a rotor blade assembly 520. The rotor 510 is provided with a plurality of slots 511 extending in the radial direction of the rotor 510. The plurality of rotor blades 521 of the rotor blade assembly 520 are respectively arranged in the slots 511 on the inner side of the rotor 510 and are configured to be radially slidable along the slots 511. The rotor 510 is eccentrically arranged in the cavity 430.

[0113] The diameter of the cavity 430 is greater than the diameter of the rotor 510 , so that the volume of the cavity 430 is greater than the volume of the rotor 510 , the center position of the rotor 510 is not coaxial with the center position of the cavity 430 , and one side of the rotor 510 remains in contact with the inner wall of the cavity 430 .

[0114] In this way, there is a gap between the rotor blade 521 and the rotor 510, and during the process of rotating the rotating member 421, there is a relative movement between the rotor blade 521 and the rotor 510, and the rotor blade 521 slides inward or outward in the chute according to the eccentric position of the rotor blade 521. For example, due to the gap between the rotor blade 521 and the rotor 510, when the rotor blade 521 is retracted into the rotor 510, the airflow will push the rotor blade 521 out of the gap between the rotor 510, and since the rotor blade 521 itself has a certain weight, most of the airflow flows in the radial direction, and the rotor blade 521 will be thrown out instantly after being pushed.

[0115] For example, Figure 7 and Fig. 7AAs shown, the pressure of the fluid inlet 410 is configured to be greater than the pressure of the fluid outlet 450. For example, the volume gap on the fluid inlet side is a high-pressure chamber, and the volume gap on the fluid outlet side is a low-pressure chamber. In this way, the fluid enters the cavity 430 of the fluid drive device 400 from the fluid inlet 410, and can rely on the pressure difference between the high-pressure chamber and the low-pressure chamber to drive the rotor blades 521 to rotate, so as to drive 510 to rotate, thereby rotating the nozzle 200, so that the nozzle 100 can achieve automatic scanning action. It should be noted that the embodiments of the present disclosure do not limit the pressure of the high-pressure chamber and the low-pressure chamber. The high pressure and low pressure are relative, as long as there is a pressure difference between the two.

[0116] For example, the high pressure chamber and the low pressure chamber are realized by connecting the fluid inlet 410 to the outlet of the high pressure source, and connecting the fluid outlet 450 to the inlet of the high pressure source or connecting the fluid outlet 450 to the atmosphere. This is only exemplary and not a limitation of the present disclosure.

[0117] In some examples, such as Figure 8 and Fig. 8A As shown, the fluid driving device 400 includes a fluid inlet 410, a fluid outlet 450, a rotating member 421, a cavity 430 and a housing 440, and the rotating member 421 includes a rotor 510 and a rotor blade assembly 520. The fluid driving device 400 may further include a partition plate 460 located in the cavity 430, and the partition plate 460 is configured to separate the cavity 430 into a first cavity 431 and a second cavity 432. The first cavity 431 and the second cavity 432 are respectively located on both sides of the partition plate 460 along the axial direction of the rotor 510, for example, Figure 8 As shown, the first cavity 431 and the second cavity 432 are respectively located on the left and right sides of the partition plate 460, the first cavity 431 is connected to the fluid inlet 410 and the second cavity 432 is connected to the fluid outlet 450, and the rotor 510 and the rotor blade assembly 520 are located in the second cavity 432, for example, the rotor 510 can be a wheel.

[0118] For example, Figure 8 and Fig. 8A As shown, the spacer plate 460 has at least one guide hole 461, for example, a plurality of guide holes 461, in the axial direction parallel to the rotor 510. The second chamber 432 is connected to the first chamber 431 through the guide hole 461, so that the fluid flows from the first chamber 431 to the second chamber 432 through the guide hole 461. Figure 8In the example, the first chamber 431 can also be called a pressure-stabilizing chamber, which is conducive to distributing a stream of fluid into multiple streams and passing through the guide hole 461 to the second chamber 432 where the sub-510 and the rotor blade group 520 are located, so that the multiple rotor blades 521 can be as balanced as possible. Thus, the fluid enters the pressure-stabilizing chamber of the cavity 430 of the fluid driving device 400 from the fluid inlet 410, and enters each guide hole 461 after distribution. The fluid is adjusted to an axial horizontal speed in the guide hole 461, and the fluid is deflected at a speed on the rotor blade 521 fixed on the rotor 510, thereby driving the rotor 510 to rotate, and then the nozzle 200 rotates, so that the nozzle 100 can achieve automatic scanning action.

[0119] In some examples, such as Fig. 9 and Fig.9A As shown, the fluid driving device 400 includes a fluid inlet 410, a fluid outlet 450, a rotating member 421, a cavity 430 and a housing 440. The rotating member 421 includes a rotor 510 and a rotor blade set 520. The fluid driving device 400 also includes at least one stator blade set 470, such as Fig. 9 The plurality of stator blade groups 470 are shown, each of which includes a plurality of stator blades 471 arranged along the circumference of the rotor 510. The number of the rotor blade group 520 is one or more, for example Fig. 9 A plurality of rotor blade assemblies 520 are shown. A plurality of rotor blades 521 of the rotor blade assembly 520 are arranged along the circumferential direction of the rotor 510 .

[0120] In some examples, the stator blade set 470 and the rotor blade set 520 are arranged alternately in the axial direction of the rotor 510, the stator blade set 470 is arranged in the cavity 430, the rotor blade set 520 is fixed on the rotor 510, and the stator blade set 470 is fixedly connected to the inner side wall of the housing 440 in the radial direction of the rotor 510. The multiple stator blades 471 of the stator blade set 470 correspond one-to-one with the multiple rotor blades 521 of the rotor blade set 520. For example, the number and position of the multiple stator blades 471 and the multiple rotor blades 521 correspond one-to-one. It should be noted that the embodiments of the present disclosure are mainly described by taking the fluid drive device 400 including multiple rotor blade groups 520 and multiple stator blade groups 470 as an example, but the embodiments of the present disclosure are not limited to this, and may also include one rotor blade group 520 and one stator blade group 470, or may include two stator blade groups 470 and a rotor blade group 520 located between the two stator blade groups 470, which will not be repeated here.

[0121] For example, for ease of description, the multiple stator blade groups 470 may be divided into multiple stages, for example, from the side close to the fluid inlet 410 to the side away from the fluid inlet 410, the values ​​i of each stage are sequentially recorded as 1, 2...N, and N is an integer greater than or equal to 2. Correspondingly, the multiple rotor blade groups 520 may also be divided into multiple stages, for example, from the side close to the fluid inlet 410 to the side away from the fluid inlet 410, the values ​​j of each stage are sequentially recorded as 1, 2...M, and M is an integer greater than or equal to 2. For example, for the fluid drive device 400 including multiple rotor blade groups 520 and multiple stator blade groups 470, the driving torque can be increased exponentially, and the fluid drive effect is better.

[0122] For example, in Fig.9A In the example, the rotor blade 521 and the stator blade 471 are bent along the circumferential direction of the rotor 510 so that the length directions of the rotor blade 521 and the stator blade 471 are not parallel to the axial direction of the rotor 510. The blade bending direction of the rotor blade 521 is opposite to the blade bending direction of the stator blade 471, and two adjacent stator blades 471 of the stator blade group 470 form a stator groove 472a, and two adjacent rotor blades 511 of the rotor blade group 520 form a rotor groove 512a, that is, the bending direction of the stator groove 472a is opposite to that of the rotor groove 512a. Thus, the fluid enters the cavity 430 of the fluid driving device 400 of the above embodiment from the fluid inlet 410, and is deflected in the stator groove 472a of the curved stator blade group 470 of the first-stage stator blade group 470, generating angular momentum such as counterclockwise rotation, and then the fluid pushes the rotor blade 521 and the rotor 510 to rotate when entering the reverse curved rotor groove 512a of the first-stage rotor blade group 520. Similarly, when entering the stator groove 472a of the second-stage stator blade group 470, the angular momentum of counterclockwise rotation is obtained again, and then when entering the rotor groove 512a of the second-stage rotor blade group 520, the rotor blade 521 and the rotor 510 are pushed to rotate again, thereby rotating the nozzle 200, so that the nozzle 100 can achieve automatic scanning action.

[0123] In some examples, a gap is provided between the right end of the stator groove 472a of the first-stage stator blade assembly 470 and the inner side wall of the right end of the housing 440, that is, a gap is provided between the right end of the stator groove 472a of the first-stage stator blade assembly 470 and the left end of the fluid inlet 410, such as Fig. 9 As shown, this is beneficial for distributing the fluid at the fluid inlet to the stator groove 472a of the downstream stator blade group 470, thereby improving the utilization rate of the fluid kinetic energy and reducing the eccentric torque.

[0124] In some examples, such as Fig.10 and Fig. 10AAs shown, the fluid driving device 400 includes a fluid inlet 410, a fluid outlet 450, a rotating member 421, a cavity 430 and a housing 440. The rotating member 421 includes a rotor 810 and a driving gear pair 820, the driving gear pair 820 includes two meshing gears 821, the rotor 810 includes two rotating shafts 811 corresponding to the two gears 821, and the gears 821 are fixed on the rotating shafts 811. The nozzle 200 extends through the through hole of any one of the two rotating shafts 811 and is fixedly connected, and the driving gear pair 820 is configured to be driven to rotate by the fluid flowing in the cavity 430, driving the two rotating shafts 811 of the rotor 810 to rotate to drive the nozzle 200 to rotate.

[0125] For example, Fig. 10A As shown, the driving gear pair 820 is arranged on the inner side of the housing 440, and the cavity 430 of the fluid driving device 400 is formed by opening a long and narrow gap in the housing 440, and the fluid inlet 410 is an opening on the injection piece that can be embedded in the port of the cavity 430. Thus, the fluid enters the cavity 430 of the fluid driving device 400 from the fluid inlet 410, pushing the two driving gears 821 to rotate, driving the two rotating shafts 811 to rotate, thereby rotating the nozzle 200, so that the nozzle 100 can achieve automatic scanning action. It should be noted that the above is only exemplary and is not a limitation of the present disclosure. For example, the embodiments of the present disclosure do not limit the inlet direction of the fluid inlet 410 of the gear-type fluid driving device and the outlet direction and position of the fluid outlet 450, as long as the inflow and outflow of the fluid and the connection with the cavity can be achieved, which will not be repeated here.

[0126] It should be noted that the present disclosure Figure 6-Figure 10 The cavity 430 in the example can be positive pressure or negative pressure, and the embodiments of the present disclosure do not limit this. In addition, the embodiments of the present disclosure do not limit the volume and shape of the cavity 430, as long as the fluid in the cavity 430 can drive the rotating member 421 to rotate. It should also be noted that the embodiments of the present disclosure Figure 6-Figure 10 The source of the fluid provided by the fluid drive device 400 in the example is not limited. For example, a separate pump and its circuit can be set to provide fluid for the fluid inlet 410 and the cavity 430, or the fluid can be obtained by sharing the pressure pump connected to the liquid supply connection pipe 620. It should be noted that the above Figure 3A-3C The corresponding suction scheme is also applicable to the present disclosure. Figure 6-Figure 10 For examples, please refer to the above description and will not be repeated here.

[0127] For example, in Figure 6-Figure 10In the example, the fluid includes gas and / or liquid, which is merely exemplary and is not limited in the embodiments of the present disclosure. As long as the conversion between the flow of the fluid and the mechanical rotation can be achieved so that the moving part 420 of the fluid driving device moves to move the nozzle 200, it will not be repeated here.

[0128] At least one embodiment of the present disclosure further provides a medical water jet system, comprising a liquid supply unit, a pressure pump, and a medical water jet instrument. The liquid supply unit is configured to provide a medical liquid. The pressure pump is configured to apply pressure to the medical liquid to input the medical liquid into the nozzle. The medical water jet instrument of the medical water jet system can be the medical water jet instrument of any embodiment described above, which will not be described in detail here. The technical effects of the medical water jet system of the embodiment of the present disclosure can refer to the description of the medical water jet instrument above, which will not be described in detail here.

[0129] There are a few points to note:

[0130] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures may refer to the general design.

[0131] (2) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0132] The above description is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A medical water jet instrument, characterized in that: include: External pipe; A nozzle extending through the outer tube and configured to input the medical liquid proximally, with a gap between the outer wall of the nozzle and the inner wall of the outer tube; a nozzle, disposed at the distal end of the nozzle tube, and configured to output the medical liquid; A fluid driving device comprises a fluid inlet, a fluid outlet, a moving part, a cavity and a shell surrounding the cavity, wherein the fluid outlet is connected to the cavity and is configured to allow the fluid to be discharged from the cavity, at least a portion of the moving part is built into the cavity, the fluid inlet is configured to allow fluid to flow in, and the fluid inlet is connected to the cavity so that the fluid flows into the cavity, the moving part is connected to the nozzle, and the moving part is configured to drive the nozzle to rotate around the central axis of the nozzle through the fluid flowing in the cavity or the moving part is configured to drive the nozzle to swing through the fluid flowing in the cavity, so that the nozzle rotates or swings accordingly.

2. The medical water jet instrument according to claim 1, characterized in that: The moving part includes a rotating member, which is disposed in the cavity and configured to be driven to rotate by the fluid flowing in the cavity, thereby driving the nozzle to rotate around the central axis of the nozzle.

3. The medical water jet instrument according to claim 2, characterized in that: The rotating member includes a rotor and a rotor blade group, the nozzle extends through the through hole of the rotor and is fixedly connected to the rotor, the rotor blade group is connected to the rotor and the rotor blade group is configured to be driven to rotate by the fluid flowing in the cavity, driving the rotor to rotate around the central axis of the nozzle to drive the nozzle to rotate.

4. The medical water jet instrument according to claim 3, characterized in that: The rotor blade group includes a plurality of rotor blades arranged along a circumferential direction of the rotor.

5. The medical water jet instrument according to claim 4, characterized in that: The plurality of rotor blades of the rotor blade assembly are fixedly connected to the rotor.

6. The medical water jet instrument according to claim 5, characterized in that: An inlet direction of the fluid inlet and / or an outlet direction of the fluid outlet is perpendicular to the axial direction of the rotor, and an extension direction of the plurality of rotor blades is not perpendicular to the axial direction of the rotor.

7. The medical water jet instrument according to claim 6, characterized in that: The rotor is provided with a plurality of slots extending in a radial direction of the rotor, the plurality of rotor blades are respectively arranged in the slots and are configured to be radially slidable in the slots, and the rotor is eccentrically arranged in the cavity.

8. The medical water jet instrument according to claim 7, characterized in that: The diameter of the cavity is greater than the diameter of the rotor, and the center position of the rotor is not coaxial with the center position of the cavity.

9. The medical water jet instrument according to claim 6, characterized in that: An inlet direction of the fluid inlet and / or an outlet direction of the fluid outlet are parallel to the axial direction of the rotor, and an extension direction of the plurality of rotor blades does not coincide with the axial direction of the rotor.

10. The medical water jet instrument according to claim 9, characterized in that: The fluid driving device further includes a partition plate located in the cavity, the partition plate being configured to separate the cavity into a first cavity and a second cavity; The first cavity and the second cavity are respectively located on both sides of the partition plate in the axial direction of the rotor, the first cavity is communicated with the fluid inlet, the second cavity is communicated with the fluid outlet, and the rotor and the rotor blade assembly are located in the second cavity; The partition plate has at least one guide hole formed in an axial direction parallel to the rotor, and the second cavity is connected with the first cavity through the at least one guide hole, so that the fluid flows from the first cavity to the second cavity through the at least one guide hole.

11. The medical water jet instrument according to claim 4, characterized in that: The rotating member includes one or more rotor blade groups, the fluid driving device also includes at least one stator blade group, each stator blade group includes a plurality of stator blades arranged along the circumference of the rotor, each rotor blade group includes a plurality of rotor blades arranged along the circumference of the rotor, the stator blade groups and the rotor blade groups are arranged alternately in the axial direction of the rotor, the stator blade group is arranged in the cavity and the stator blade group is fixedly connected to the inner side wall of the housing in the radial direction of the rotor; The plurality of stator blades of the stator blade group correspond one-to-one to the plurality of rotor blades of the rotor blade group, wherein the rotor blades and the stator blades are bent along the circumferential direction of the rotor so that the length directions of the rotor blades and the stator blades are not parallel to the axial direction of the rotor; The blade bending direction of the rotor blade is opposite to the blade bending direction of the stator blade, a stator groove is formed between two adjacent stator blades of the stator blade group, and a rotor groove is formed between two adjacent rotor blades of the rotor blade group.

12. The medical water jet instrument according to claim 2, characterized in that: The rotating member includes a rotor and a driving gear pair, the driving gear pair includes two meshing gears, the rotor includes two rotating shafts corresponding to the two gears one by one and the gears are fixed on the rotating shafts, the nozzle extends through the through holes of any one of the two rotating shafts and is fixedly connected, and the driving gear pair is configured to be driven to rotate by the fluid flowing in the cavity, driving the two rotating shafts to rotate so as to drive the nozzle to rotate around the central axis of the nozzle.

13. The medical water jet instrument according to claim 1, characterized in that: The sports unit includes: A cam shaft, wherein the axial direction of the cam shaft is along the radial direction of the nozzle, and both ends of the axial direction of the cam shaft are respectively connected to the housing; A cam assembly comprises an eccentric cam and cam blades arranged around the periphery of the eccentric cam, wherein the eccentric cam is sleeved on the outer side of the cam shaft and is eccentrically arranged relative to the cam shaft, the eccentric cam abuts against a first side of the nozzle in a first direction, the first direction is perpendicular to the axial direction of the cam shaft and perpendicular to the axial direction of the nozzle, and the cam blades are configured to be driven to rotate by the fluid flowing in the cavity, driving the eccentric cam to rotate around the cam shaft, so that the eccentric cam drives the nozzle to swing back and forth in the first direction.

14. The medical water jet instrument according to claim 13, characterized in that: The fluid driving device further comprises a nozzle rotating shaft, wherein the axial direction of the nozzle rotating shaft is along the radial direction of the nozzle and parallel to the axial direction of the cam rotating shaft, and the two axial ends of the nozzle rotating shaft are respectively connected to the housing, and the nozzle rotating shaft is configured to be rotatable around the axial direction of the nozzle rotating shaft, and the nozzle rotating shaft is located on one side of the cam rotating shaft along the axial direction of the nozzle; The nozzle shaft comprises a first shaft section, an intermediate ring and a second shaft section which are sequentially connected in the axial direction of the nozzle shaft, and the intermediate ring is configured to allow the nozzle to extend through.

15. The medical water jet instrument according to claim 13, characterized in that: The fluid driving device also includes a nozzle reed, at least a portion of which is configured to abut against a second side of the nozzle in the first direction so that the nozzle is clamped between the nozzle reed and the eccentric cam in the first direction, wherein the second side and the first side are respectively opposite sides of the nozzle in the first direction.

16. The medical water jet instrument according to claim 15, characterized in that: The nozzle reed comprises a first part and a second part connected to each other, the first part abuts against an inner wall of the housing on one side in the first direction, and the first part extends in the axial direction of the nozzle from an end connected to the second part to a side away from the fluid inlet; The second part includes a first strip-shaped body, a second strip-shaped body and a third strip-shaped body which are sequentially arranged in the axial direction of the cam shaft; The second strip is configured to abut against the second side of the nozzle in the first direction and the second strip extends from an end connected to the first portion to a side away from the fluid inlet in the axial direction of the nozzle, and the elastic force generated by the compression deformation of the second strip causes the nozzle to abut against the eccentric cam; The first strip body and the third strip body respectively extend from one end connected to the first part to a side away from the fluid inlet, and the extension directions of the first strip body and the third strip body are respectively at an acute angle to the extension direction of the second strip body, so as to guide the fluid to the first side, thereby driving the eccentric cam to rotate.

17. The medical water jet instrument according to claim 1, characterized in that: It also includes a suction tube, wherein the suction tube is configured to be provided with negative pressure by a negative pressure suction machine, wherein, The gap between the outer wall of the nozzle and the inner wall of the outer tube serves as a suction channel, the fluid inlet is located at the distal end of the suction channel, the distal end of the cavity is communicated with the suction channel, the fluid outlet is located at the proximal end of the cavity, and the suction tube is communicated with the proximal end of the fluid outlet.

18. The medical water jet instrument according to claim 1, characterized in that: It also includes a liquid supply connection pipeline, One end of the liquid supply connection pipe is connected to the proximal end of the nozzle, and the other end of the liquid supply connection pipe is configured to be connected to the output end of the pressure pump to input the medical liquid.

19. The medical water jet instrument according to any one of claims 1 to 18, characterized in that: It also includes a handle, the fluid drive device is arranged in the handle, and the handle is sleeved on the outside of the proximal end of the outer tube and fixedly connected to the proximal end of the outer tube.

20. A medical water jet system, comprising: The medical water jet instrument as claimed in any one of claims 1 to 19; a liquid supply unit configured to provide the medical liquid; A pressure pump is configured to apply pressure to the medical liquid to input the medical liquid into the nozzle.

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