Medical water jet scalpel instrument and medical water jet scalpel system

Abstract

The present disclosure provides a medical water jet scalpel instrument and a medical water jet scalpel system. The medical water jet scalpel instrument comprises an outer tube, a spray tube, and a driving device. The outer tube comprises a first tube body extending in a first direction and a first distal end portion having a first distal-side tube opening end surface, and the first distal-side tube opening end surface is arranged to be inclined to the first direction. The spray tube extends through the outer tube; a medical liquid is input from a proximal end of the spray tube; a gap is formed between the outer wall of the spray tube and the inner wall of the outer tube; a spray hole is formed in a distal end of the spray tube; and the medical liquid is sprayed in a second direction inclined to the first direction. The driving device is connected to at least part of the spray tube, and drives the spray tube to move. According to the present disclosure, by inclining the axis of the outer tube body to the tube opening of the outer tube, and ingeniously designing the outer tube and / or an inner tube, the medical liquid is sprayed in another direction inclined to the direction of the outer tube body, such that in, for example, open surgery or endoscopic surgery, the operation of an operator can be more flexible, the clinical functional requirements are met, and great advantages in matching performance, processability and assemblability are achieved.

Description

Medical water jet instruments and medical water jet systems

[0001] For all purposes, this application claims priority to Chinese Patent Application No. 202311014174.9 filed on August 11, 2023, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0002] The present disclosure relates to the field of medical devices, and in particular to a medical water jet device and a medical water jet system. Background Art

[0003] Treatment options for liver cancer include surgery, local ablation, transcatheter arterial chemoembolization, radiotherapy, and systemic therapy. Currently, surgical procedures such as water jets and scalpels remain the preferred method for treating liver cancer.

[0004] The liver is a highly complex organ with a rich blood supply. It primarily consists of two different types of tissue: the hepatic parenchyma and the luminal tissue. The hepatic parenchyma is soft, while the luminal tissue is resilient. These two tissues differ significantly in mechanical strength. Under the impact of the medical waterjet jet, the hepatic parenchyma fractures and fragments, being removed, while the luminal tissue remains intact, allowing the medical waterjet to achieve a broad range of selective separation capabilities.

[0005] However, as the field of medical surgery evolves toward minimally invasive and sophisticated procedures, no single liver resection method can fully meet the diverse surgical needs, effectively control postoperative complications, or improve five-year survival rates. Therefore, further innovation in existing medical technologies is imperative.

[0006] Summary of the Invention

[0007] At least one embodiment of the present disclosure provides a medical water jet instrument, comprising: an outer tube, comprising a first tube body extending along a first direction and a first distal end portion having a first distal nozzle end face, wherein the plane where the first distal nozzle end face is located is inclined to the first direction; a nozzle, extending through the outer tube and configured to input medical liquid proximally, with a gap between the outer wall of the nozzle and the inner wall of the outer tube, a nozzle hole for outputting the medical liquid being provided at the distal end of the nozzle, and the medical liquid being ejected along a second direction inclined to the first direction; and a driving device, connected to at least a portion of the nozzle and driving the nozzle to move.

[0008] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the first distal end portion of the outer tube is curved; the nozzle includes a second tube body extending along a first direction and a curved second distal end portion.

[0009] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the first distal nozzle end face is perpendicular to the central axis of the first distal portion, and the second distal nozzle end face on the second distal portion is perpendicular to the central axis of the second distal portion.

[0010] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the central axis of the first distal portion and the central axis of the second distal portion are parallel.

[0011] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the first tube body of the outer tube is continuous and coaxial with the first distal end portion, and the first distal tube mouth end face of the outer tube is inclined to the first direction; the nozzle is arranged to extend along the first direction, and the second distal tube mouth end face of the nozzle is inclined to the first direction.

[0012] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the plane where the end face of the first distal nozzle is located is parallel to the plane where the second distal nozzle is located.

[0013] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the first tube body of the outer tube is continuous and coaxial with the first distal end portion, and the first distal nozzle end face of the outer tube is inclined to the first direction; the nozzle is arranged to extend along the first direction, the second distal nozzle end face of the nozzle is perpendicular to the first direction, and the spray hole is arranged to be an inclined hole relative to the second distal nozzle end face, so that the medical liquid is sprayed along the second direction.

[0014] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the second direction is perpendicular to the end face of the first distal nozzle.

[0015] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the acute angle between the second direction and the first direction is inclination is 10° to 50°.

[0016] For example, in a medical water jet instrument provided by at least one embodiment of the present disclosure, the proximal end of the nozzle is configured to be fixed relative to the outer tube, and the driving device is configured to drive the nozzle so that the nozzle hole of the nozzle swings back and forth in one dimension relative to the outer tube along the radial direction of the outer tube or swings in a two-dimensional circle around the central axis of the outer tube.

[0017] At least one embodiment of the present disclosure further provides a medical waterjet system, comprising a liquid supply unit, a pressure pump, and any of the medical waterjet devices described above. The liquid supply unit is configured to provide a medical liquid. The pressure pump is configured to apply pressure to the medical liquid to deliver the medical liquid to a nozzle.

[0018] Compared with the prior art, the beneficial effects of at least one embodiment of the present disclosure include at least the following: the medical water jet instrument of the present disclosure is designed to have the axis of the main body of the outer tube and the tube mouth of the outer tube tilted rather than perpendicular to each other, and the outer tube and / or the inner tube are cleverly designed to make the jet direction form an inclined angle with the central axis of the main body of the outer tube. Therefore, the present disclosure can make the operator's operation more flexible whether in open surgery or laparoscopic surgery, which can not only meet clinical functional requirements, but also achieve technical effects with great advantages in matching, processability and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0020] FIG1 is a cross-sectional view of a medical water jet device provided by some embodiments of the present disclosure;

[0021] FIG2 is a schematic diagram showing the one-dimensional reciprocating swing of the nozzle portion of a medical water jet device according to some embodiments of the present disclosure;

[0022] FIG3 is a schematic diagram showing the principle of two-dimensional circular oscillation of the nozzle portion of a medical water jet device according to some embodiments of the present disclosure;

[0023] 4-5 are schematic diagrams of structures in which both the outer tube and the nozzle are provided with elbows according to some embodiments of the present disclosure, and FIG5 is a left side view of FIG4 ;

[0024] 6-7 are schematic diagrams of structures in which both the outer tube and the nozzle are provided with oblique openings according to some embodiments of the present disclosure, and FIG7 is a left side view of FIG6 ;

[0025] 8-9 are schematic diagrams of structures in which an outer tube is provided with an oblique opening and a nozzle is provided with an oblique hole, provided in some embodiments of the present disclosure. FIG. 9 is a left side view of FIG. 8 ;

[0026] In the figure: 100 - medical water jet instrument, 110 - outer tube, 111 - first tube body, 112 - first distal end portion, 112a - first distal nozzle end face, 120 - nozzle, 121 - second tube body, 122 - second distal end portion, 122a - second distal nozzle end face, 130 - driving device. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present disclosure have the same meaning as commonly understood by those skilled 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 explicitly defined in this manner in the embodiments of the present disclosure.

[0029] 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" do not indicate a quantity limitation, but rather indicate the existence of at least one. Similarly, words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" 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 performed in exact order. Instead, the various steps may be processed in reverse order or simultaneously, unless otherwise specified in the embodiments of the present disclosure. At the same time, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0030] In surgical treatment of the liver, the ideal method of liver resection should have the following characteristics: fast speed, no thermal damage, protection of the lumen, fine separation, minimal blood loss, easy operation under laparoscopy, less likely to cause bile leakage and fluid accumulation, low cost, and ideal operating environment.

[0031] Medical waterjet technology has great potential for application in liver resection. For example, a medical waterjet can cut or remove the liver parenchyma within a cutting zone of a certain width and length, while simultaneously preserving and exposing luminal tissue. This method causes no thermal damage to luminal or parenchymal tissue. Closing and severing the luminal tissue while it is clearly visible also protects the luminal tissue and reduces surgical risk. Bleeding is minimal during the procedure, and bile leakage and effusion are unlikely to occur. However, in most medical waterjet instruments, the axis of the handle, the axis of the outer tube, and the direction of the medical fluid jet are parallel. This limits the direction of the surgical operation, creating significant difficulties for the operator (e.g., physician), especially during laparoscopic use.

[0032] If the nozzle part of the medical water jet instrument rotates (that is, the direction of the nozzle part itself is deflected when the nozzle rotates, and the nozzle rotation refers to the rotation of the nozzle around the central axis of the nozzle), it is easy to cause the deflection direction of the jet to change periodically, which is difficult to meet the operator's requirements.

[0033] At least one embodiment of the present disclosure provides a medical water jet device comprising an outer tube, a nozzle, and a drive device. The outer tube comprises a first tube body extending in a first direction and a first distal portion having a first distal nozzle end face arranged obliquely with respect to the first direction. The nozzle extends through the outer tube and is configured to deliver a medical liquid proximally. A gap is defined between the outer wall of the nozzle and the inner wall of the outer tube. The distal end of the nozzle is provided with a nozzle orifice for delivering the medical liquid, and the medical liquid is ejected in a second direction oblique to the first direction. The drive device is connected to at least a portion of the nozzle and drives the nozzle to move.

[0034] The medical water jet instrument of the above-mentioned embodiment of the present disclosure is designed to have the axis of the main body of the outer tube and the tube mouth of the outer tube arranged in an inclined manner, that is, the plane where the tube mouth of the outer tube is located intersects with the axis of the main body of the outer tube but is not perpendicular to each other, so that the jet direction and the central axis of at least a part of the outer tube are at an inclined angle. Therefore, the inclination angle design makes the operator's operation more flexible whether in open surgery or laparoscopic surgery, which not only meets clinical functional requirements, but also achieves technical effects with great advantages in matching, processability and assembly.

[0035] The structural solution proposed in at least one embodiment of the present disclosure, first, meets the clinical functional requirement of deflecting the jet direction and the outer tube axis direction by a certain angle; second, meets the system's requirements for the structural movement of the instrument in the working state; in addition, it can also have better compatibility with the 5mm puncture device, better processability and assembly, and therefore, better economic benefits.

[0036] The embodiments of the present disclosure and examples thereof are described in detail below with reference to the accompanying drawings.

[0037] For the sake of convenience, the proximal end of the outer tube 110 of the medical water jet instrument 100 in FIG1 of the embodiment of the present disclosure is the side close to the operator, and the distal end of the outer tube 110 is the side away from the operator. At least one embodiment of the present disclosure regards the side close to the operator (e.g., a doctor) 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 proximal end in 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 in the embodiments of the present disclosure represents one side, and the distal end represents the other side opposite to the proximal end.

[0038] 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. However, 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 the substantial tissues and luminal tissues (such as blood vessels, bile ducts, ureters, bronchi, etc.) corresponding to other human organs (such as lungs, kidneys, spleen, etc.). It can be determined according to actual conditions, and the embodiments of the present disclosure are not limited to this.

[0039] FIG1 is a cross-sectional view of a medical water jet apparatus provided by some embodiments of the present disclosure.

[0040] For example, as shown in FIG1 , at least one embodiment of the present disclosure provides a medical waterjet device 100 comprising an outer tube 110, a nozzle 120, and a drive device 130. The nozzle 120 extends through the outer tube 110 and is configured to input and circulate a pressurized medical fluid. A gap is defined between the outer wall of the nozzle 120 and the inner wall of the outer tube 110 (i.e., the space formed by the inner wall of the outer tube 110 and the outer wall of the nozzle 120). The nozzle 120 may also be referred to as the inner tube. The drive device 130 is connected to at least a portion of the nozzle 120 and drives the nozzle 120 to move. For example, the drive device 130 drives the distal end of the nozzle 120 to oscillate one-dimensionally along the radial direction of the nozzle 120 relative to the outer tube 110 or to oscillate two-dimensionally around the central axis of the outer tube 110. As the nozzle 120 moves, the gap between the outer wall of the nozzle 120 and the inner wall of the outer tube 110 changes.

[0041] For example, the distal end of the nozzle 120 is provided with a nozzle hole (not shown in FIG. 1 ) for discharging a medical liquid, so that the medical liquid is ejected in a certain direction (e.g., the second direction described below), thereby achieving selective separation of, for example, liver parenchyma and, for example, blood vessels or bile ducts in the body using a jet. For example, the jet formed by the embodiments of the present disclosure can efficiently achieve selective separation of flexible tissue and elastic tissue.

[0042] In some examples, the spray hole can be directly opened on the distal end of the nozzle 120 (that is, it can also be understood that the distal end of the nozzle 120 includes a nozzle portion and the nozzle portion includes a spray hole), or the spray hole can be opened on a nozzle portion (not shown in Figure 1) fixedly installed at the distal end of the nozzle 120, and the nozzle portion is fixedly set on the distal end of the nozzle 120 as another component independent of the nozzle 120.

[0043] In some examples, the driving device 130 drives the nozzle 120 to move so as to drive the nozzle portion at the distal end of the nozzle 120 to move, and the movement of the nozzle portion is consistent with the movement of the distal end of the nozzle 120. For example, the proximal end of the nozzle 120 moves (e.g., swings) under the drive of the driving device 130, and this movement is transmitted to the distal end of the nozzle 120 and the nozzle portion at the distal end, causing the nozzle portion to move accordingly. As a result, the moving nozzle portion causes the high-pressure jet ejected from its nozzle hole to perform an automatic scanning action.

[0044] It should be noted that the specific design of the nozzle and nozzle orifice is not a key point in the embodiments of the present disclosure and will not be described in detail here. For the sake of clarity and brevity, the following description will mainly use the example of a nozzle orifice directly provided at the distal end of the nozzle tube 120 as an example, but the embodiments of the present disclosure are not limited to this example, and this article will not provide an exhaustive or detailed description.

[0045] For example, the inner diameter of the outer tube 110 of the medical water jet instrument 100 is larger than the outer diameter of the nozzle 120 of the medical water jet instrument 100. For example, the medical liquid may include physiological saline. For example, the medical water jet instrument 100 is a disposable surgical instrument that can be operated by a doctor with one hand. For example, the medical water jet instrument 100 may also include a handle, the drive device 130 is disposed inside the handle, and the handle is sleeved on the outside of the proximal end of the outer tube 110 and fixedly connected to the proximal end of the outer tube 110. It should be noted that these are merely exemplary and are not limitations of the present disclosure. For example, in some other embodiments, the drive device 130 may also be located on the outside of the handle. This is not the focus of the embodiments of the present disclosure and will not be described in detail here.

[0046] Figure 2 is a schematic diagram showing the one-dimensional reciprocating oscillation of the nozzle portion of a medical water jet device according to some embodiments of the present disclosure. Figure 3 is a schematic diagram showing the two-dimensional circular oscillation of the nozzle portion of a medical water jet device according to some embodiments of the present disclosure.

[0047] For example, as shown in Figures 2 and 3, the nozzle 120 is arranged inside the outer tube 110. The solid circle on the left and the dotted circle on the right inside the outer tube 110 respectively represent the possible positions of the nozzle part (and the nozzle hole) at the far end of the nozzle 120 at two movement moments. The dotted lines and arrows represent the scanning path and movement direction of the nozzle part. "A" can be used to represent the direction of the nozzle part itself, that is, if "A" is inverted, it means that the nozzle part has rotated 180° at the corresponding position.

[0048] For example, the example in FIG2 corresponds to a situation where the distal end of the nozzle 120 oscillates one-dimensionally in the radial direction of the outer tube 110 relative to the outer tube 110 (this can also be referred to as the nozzle 120 oscillating in the outer tube 110). For example, the example in FIG3 corresponds to a situation where the distal end of the nozzle 120 oscillates two-dimensionally in the radial direction of the nozzle 120 around the central axis of the outer tube 110 (this can also be referred to as the nozzle 120 oscillating in the outer tube 110). As can be seen from FIG2 and FIG3, during the oscillation of the distal end of the nozzle 120, regardless of the path, the nozzle portion itself does not deflect, that is, the nozzle portion does not rotate.

[0049] Figures 4-5 are schematic diagrams of the structure of the outer tube and nozzle provided in some embodiments of the present disclosure, both with elbows, with Figure 5 being a left side view of Figure 4. Figures 6-7 are schematic diagrams of the structure of the outer tube and nozzle provided in some embodiments of the present disclosure, both with beveled openings, with Figure 7 being a left side view of Figure 6. Figures 8-9 are schematic diagrams of the structure of the outer tube provided with a beveled opening and the nozzle provided with an oblique hole, with Figure 9 being a left side view of Figure 8.

[0050] For example, as shown in Figures 4, 6, and 8, the outer tube 110 includes a first tube body 111 extending in a first direction and a first distal end portion 112 having a first distal nozzle end surface 112a. The plane of the first distal nozzle end surface 112a is inclined in the first direction. For example, the first direction corresponds to the left-right direction on the drawings in Figures 1, 4, 6, and 8. For example, the distal end of the nozzle 120 is provided with a nozzle (not shown) for discharging a medical liquid, and the medical liquid is ejected in a second direction oblique to the first direction. For example, the second direction corresponds to the direction of arrow B on the drawings in Figures 4, 6, and 8.

[0051] The medical water jet instrument of the above-mentioned embodiment of the present disclosure is designed to have the axis of the main body of the outer tube and the tube mouth of the outer tube arranged at an angle, so that the jet direction is inclined at an angle to the central axis of at least a part of the outer tube, which is beneficial to broaden the operating range of the medical water jet instrument during surgery, making the use of the instrument more flexible and meeting the user's clinical functional requirements for the instrument.

[0052] In the embodiment of the present disclosure, at least a portion of the outer tube 110 or at least a portion of the nozzle 120 extending along the first direction means that the central axis of this portion coincides with or is parallel to the first direction.

[0053] In some examples, the surface of the tissue to be treated is configured to be in contact with the first distal nozzle end surface 112a of the outer tube 110. This is merely exemplary and is not a limitation of the embodiments of the present disclosure.

[0054] For example, as shown in FIG. 4 and FIG. 5 , the first distal portion 112 of the outer tube 110 is curved, that is, the first distal portion 112 of the outer tube 110 is not coaxial with the first tube body 111 of the outer tube 110 .

[0055] For example, as shown in FIG4 and FIG5 , the nozzle 120 includes a second tube body 121 extending along a first direction and a curved second distal end portion 122 , that is, the second distal end portion 122 of the nozzle 120 is not coaxial with the second tube body 121 of the nozzle 120 .

[0056] In some examples, the outer tube 110 and the nozzle 120 are straight tubes with good cylindricity (e.g., when the desired state is reached). For example, in some embodiments of the present disclosure, by reasonably designing the length and diameter of the outer tube 110 and the nozzle 120, as well as the material of the tube body, etc., the first tube body 111 and the second tube body 121 are maintained in a nearly straight tube state during surgery. For example, in some embodiments of the present disclosure, the first distal end 112 is curved, and the curved second distal end 122 refers to the curved portion in a stable state after the final bend. Therefore, for the outer tube 110 and the nozzle 120, they do not present an overall bend during surgery, but a local bend at the distal end.

[0057] For example, as shown in Figure 4, the first distal tube mouth end face 112a of the outer tube 110 is perpendicular to the central axis of the first distal portion 112, that is, the first distal tube mouth end face 112a of the outer tube 110 is a straight mouth shape (also called a flat mouth shape) perpendicular to the central axis of the first distal portion 112, and the second distal tube mouth end face 122a on the second distal portion 122 is perpendicular to the central axis of the second distal portion 122, that is, the second distal tube mouth end face 122a on the second distal portion 122 is a straight mouth shape (also called a flat mouth shape) perpendicular to the central axis of the second distal portion 122.

[0058] For example, in the example of FIG. 4 , the second direction corresponding to the jet injection is perpendicular to the first distal nozzle end surface 112 a of the outer tube 110 .

[0059] The embodiment of the present disclosure uses the two elbow features at the distal end of the outer tube and the distal end of the nozzle to deflect the jet direction from the axial direction of the outer tube body at a certain angle, which can meet clinical functional requirements.

[0060] For example, as shown in FIG4 , the central axis of the first distal portion 112 of the outer tube 110 is parallel to the central axis of the second distal portion 122 of the nozzle 120, that is, the curvature of the first distal portion 112 of the outer tube 110 is the same as the curvature of the second distal portion 122 of the nozzle 120 and the bending direction is the same. Exemplarily, the central axis of the first distal portion 112 and the central axis of the second distal portion 122 are both curved, and the two curved axes are arranged in parallel, that is, the spacing between each corresponding position of the two curved axes is equal. In this way, the embodiments of the present disclosure can not only meet clinical functional requirements, but also increase the advantages in matching, processability, and assembly.

[0061] For example, as shown in Figures 6 and 7, the first tube body 111 of the outer tube 110 is continuous and coaxial with the first distal end portion 112 of the outer tube 110 (that is, the outer tube 110 extends as a whole along the first direction and there is no elbow provided at the distal end of the outer tube 110, and the central axis of the entire outer tube 110 is along the first direction), and the first distal tube mouth end face 112a of the outer tube 110 is inclined to the first direction (the first direction intersects with the first distal tube mouth end face 112a and is not perpendicular), that is, the first distal tube mouth end face 112a of the outer tube 110 is oblique relative to the first direction.

[0062] In some examples, the first tube body 111 of the outer tube 110 and the first distal end portion 112 of the outer tube 110 are continuous, which means that the first tube body 111 and the first distal end portion 112 of the outer tube 110 are at least partially in contact and connected on the side close to each other (for example, the two are butted end to end), so that the first tube body 111 and the first distal end portion 112 are continuous and uninterrupted in space. For example, the first tube body 111 and the first distal end portion 112 are integrally formed. Of course, this is merely exemplary and does not limit the embodiments of the present disclosure. As long as the first tube body 111 and the first distal end portion 112 can also be two independent parts that are directly connected, they will not be exhaustively listed or repeated here. It should be noted that the interpretation of continuity in other embodiments of the present disclosure can also refer to the description here and will not be repeated here.

[0063] For example, as shown in Figures 6 and 7, the nozzle 120 is configured to extend along the first direction (that is, the nozzle 120 as a whole extends along the first direction and there is no elbow set at the distal end of the nozzle 120, and the central axis of the entire nozzle 120 is along the first direction), and the distal nozzle end face of the nozzle 120 (for clarity and simplicity, it can be recorded as the second distal nozzle end face 122a), the second distal nozzle end face 122a is inclined to the first direction (the first direction intersects with the second distal nozzle end face 122a and is not perpendicular), that is, the second distal nozzle end face 122a is oblique relative to the first direction.

[0064] For example, in the example of FIG. 6 , the second direction corresponding to the jet is perpendicular to the first distal nozzle end surface 112 a of the outer tube 110 .

[0065] In some examples, the first distal nozzle end surface 112a of the outer tube 110 can be beveled to achieve the desired beveled shape, and the second distal nozzle end surface 122a of the nozzle 120 can also be beveled to achieve the desired beveled shape. For example, the nozzle hole at the distal end of the nozzle 120 is a straight hole, and the end surface of the straight hole can be fixed to the beveled end of the nozzle 120. This is merely exemplary and does not limit the embodiments of the present disclosure.

[0066] The embodiments of the present disclosure combine the outer tube bevel and the nozzle bevel to deflect the jet direction at a certain angle relative to the outer tube axis and to fit the tube mouth to the tissue surface. This not only meets clinical functional requirements but also provides better compatibility with 5mm puncture devices (for example, the bevel design of the outer tube 110 has no adverse effect on passing through a 5mm puncture device), and has better processability (for example, the outer tube and nozzle are easy to process) and assembly (for example, the nozzle has fewer axial and circumferential constraints when moving in the outer tube, making the assembly process relatively simple).

[0067] For example, as shown in FIG6 , the plane where the first distal nozzle end face 112a of the outer tube 110 is located is parallel to the plane where the second distal nozzle end face 122a of the nozzle 120 is located, that is, the slope of the bevel shape of the first distal nozzle end face 112a of the outer tube 110 and the bevel shape of the second distal nozzle end face 122a of the nozzle 120 are the same in slope and inclination direction. In this way, the embodiments of the present disclosure can further increase the advantages in clinical functional requirements, matching, processability, and assembly. Here, the slope refers to the angular coefficient of the acute angle between the first distal nozzle end face 112a or the second distal nozzle end face 122a and the first direction, that is, the degree of inclination of the first distal nozzle end face 112a or the second distal nozzle end face 122a relative to the first direction.

[0068] For example, as shown in Figures 8 and 9, the first tube body 111 of the outer tube 110 is continuous and coaxial with the first distal end portion 112 of the outer tube 110 (that is, the outer tube 110 extends as a whole along the first direction and there is no elbow provided at the distal end of the outer tube 110, and the central axis of the entire outer tube 110 is along the first direction), and the first distal tube mouth end surface 112a of the outer tube 110 is inclined to the first direction, that is, the first distal tube mouth end surface 112a of the outer tube 110 is oblique relative to the first direction.

[0069] For example, as shown in Figures 8 and 9, the nozzle 120 is configured to extend along a first direction (i.e., the nozzle 120 extends entirely along the first direction and no elbow is provided at the distal end of the nozzle 120, with the central axis of the entire nozzle 120 extending along the first direction). The distal nozzle end face of the nozzle 120 (which may be referred to as the second distal nozzle end face 122a for clarity and brevity) is perpendicular to the first direction. That is, the second distal nozzle end face 122a is straight and perpendicular to the first direction. The spray hole is configured as an oblique hole with respect to the second distal nozzle end face 122a, so that the medical liquid is sprayed along the second direction B. The oblique hole shape in some embodiments of the present disclosure means that the axis of the hole (i.e., the nozzle hole) is not parallel to the first direction of the nozzle 120, but is inclined. In other words, the axis of the nozzle hole is not perpendicular to the second distal nozzle end face 122a.

[0070] The embodiments of the present disclosure combine the oblique opening of the outer tube and the oblique hole of the inner tube to deflect the jet direction at a certain angle relative to the axial direction of the outer tube and to allow the tube opening to fit the tissue surface. This not only meets clinical functional requirements but also provides better compatibility with 5mm puncture devices (for example, the oblique opening design of the outer tube 110 has no adverse effect on passing through a 5mm puncture device), better processability (for example, the outer tube and nozzle are easy to process) and assembly (for example, the nozzle has fewer axial and circumferential constraints when moving in the outer tube, making the assembly process relatively simple).

[0071] Some embodiments of the present disclosure form oblique nozzle holes by drilling oblique holes in the straight nozzle end face (such as the vertical end face shown in FIG8 , where the cross-section of the vertical end face is a perfect circle) of the nozzle 120 extending in the first direction. Thus, because the jet direction is consistent with the oblique hole direction of the nozzle, the jet direction (i.e., the second direction) is deflected from the central axis of the nozzle and outer tube extending in the first direction. Therefore, the embodiments of the present disclosure are very simple to manufacture and fix.

[0072] For example, in the example of FIG. 8 , the second direction corresponding to the jet injection is perpendicular to the first distal nozzle end surface 112 a of the outer tube 110 .

[0073] In some examples, the acute angle between the second direction and the first direction is 10° to 50°. Thus, the embodiments of the present disclosure can well meet clinical functional needs and well meet the requirements for the structural movement of the device in the working state. It should be noted that this is merely illustrative and does not limit the embodiments of the present disclosure. It can be freely adjusted according to actual application needs and is not exhaustive or detailed here.

[0074] In some examples, the proximal portion of the nozzle 120 is configured to be fixed relative to the outer tube 110, and the driving device 130 is configured to drive the nozzle hole on the distal portion of the nozzle 120 (such as the second distal portion of the nozzle 120, such as the second distal portion 122 of the nozzle 120 shown in Figure 4) to swing back and forth in one dimension relative to the outer tube 110 in the radial direction of the outer tube 110 (also referred to as horizontal swing) or to swing in two dimensions around the central axis of the outer tube 110 (also referred to as orbital swing).

[0075] The medical water jet instrument of the embodiment of the present disclosure realizes that the axis of the main body of the outer tube and the nozzle of the outer tube are designed to be inclined rather than perpendicular to each other under the condition of horizontal or orbital swing, and the direction of the jet is made to be inclined at an angle to the axis of the main body of the outer tube through the clever design of the outer tube and / or the inner tube. In this way, the deflection direction of the jet will not change periodically due to the rotation of the nozzle part. For example, because the position of the nozzle part in the embodiment of the present disclosure only has horizontal or orbital swing but no rotation, the embodiment of the present disclosure can achieve the requirement of a predictable fixed angle of deflection of the nozzle jet that meets the needs of the operator, well meets the clinical functional requirements, and meets the structural requirements of the system for the instrument.

[0076] At least one embodiment of the present disclosure further provides a medical waterjet system comprising a liquid supply unit, a pressure pump, and a medical waterjet 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 deliver the medical liquid to a nozzle. The medical waterjet instrument of the medical waterjet system can be any of the medical waterjet instruments described above and will not be further described here. The technical effects of the medical waterjet system of the embodiments of the present disclosure can be referred to above in the description of the medical waterjet instrument and will not be further described here.

[0077] There are a few points to note:

[0078] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0079] (2) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0080] The above description is only a specific embodiment 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 device, comprising: The outer tube comprises a first tube body extending in a first direction and a first distal end portion having a first distal tube opening end surface, wherein a plane where the first distal tube opening end surface is located is inclined with respect to the first direction; A nozzle extending through the outer tube and configured to input the medical liquid at the proximal end, a gap being provided between the outer wall of the nozzle and the inner wall of the outer tube, a nozzle hole for outputting the medical liquid being provided at the distal end of the nozzle, and the medical liquid being ejected in a second direction inclined to the first direction; A driving device is connected to at least a portion of the nozzle and drives the nozzle to move.

2. The medical water jet instrument according to claim 1, wherein: The first distal end portion of the outer tube is curved; The nozzle includes a second tube body extending along the first direction and a curved second distal end portion.

3. The medical water jet instrument according to claim 2, wherein: The first distal tube opening end surface is perpendicular to the central axis of the first distal portion, and the second distal tube opening end surface on the second distal portion is perpendicular to the central axis of the second distal portion.

4. The medical water jet instrument according to claim 2, wherein: A central axis of the first distal portion and a central axis of the second distal portion are parallel.

5. The medical water jet instrument according to claim 1, wherein: The first tube body of the outer tube is continuous and coaxial with the first distal end portion, and the first distal tube opening end surface of the outer tube is inclined with respect to the first direction; The nozzle is arranged to extend along the first direction, and the second distal nozzle end surface of the nozzle is arranged to be inclined with respect to the first direction.

6. The medical water jet instrument according to claim 5, wherein: The plane where the first distal tube orifice end surface is located is parallel to the plane where the second distal tube orifice end surface is located.

7. The medical water jet instrument according to claim 1, wherein: The first tube body of the outer tube is continuous and coaxial with the first distal end portion, and the first distal tube opening end surface of the outer tube is inclined with respect to the first direction; The nozzle is arranged to extend along the first direction, the second distal nozzle end face of the nozzle is perpendicular to the first direction, and the nozzle hole is arranged to be an inclined hole relative to the second distal nozzle end face. shape so that the medical liquid is ejected along the second direction.

8. The medical water jet device according to any one of claims 1 to 7, wherein: The second direction is perpendicular to the first distal nozzle end surface.

9. The medical water jet instrument according to any one of claims 1 to 7, wherein: An acute angle between the second direction and the first direction is 10° to 50°.

10. The medical water jet device according to any one of claims 1 to 7, wherein: The proximal end of the nozzle is configured to be fixed relative to the outer tube, and the driving device is configured to drive the nozzle so that the nozzle hole of the nozzle can swing back and forth in one dimension relative to the outer tube along the radial direction of the outer tube or can swing in a two-dimensional circle around the central axis direction of the outer tube.

11. A medical water jet system, comprising: The medical water jet instrument according to any one of claims 1 to 10; 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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