Medical water jet scalpel instrument and medical water jet scalpel system

Abstract

The invention 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 the first direction and a first far-end portion provided with a first far-side tube opening end face, and the first far-side tube opening end face is obliquely arranged relative to the first direction. The spray pipe extends and penetrates into the outer pipe, medical liquid is input into the near end of the spray pipe, a gap is formed between the outer wall of the spray pipe and the inner wall of the outer pipe, a spray hole is formed in the far end of the spray pipe, and the medical liquid is sprayed in the second direction inclined to the first direction. The driving device is connected with at least part of the spray pipe and drives the spray pipe to move. The axis of the outer tube body and the tube opening of the outer tube body are inclined, and the outer tube and / or the inner tube are ingeniously designed, so that the medical liquid is sprayed in the other direction inclined to the direction of the outer tube body, the operation of an operator can be more flexible in an open operation mode or an endoscope operation mode, the clinical function requirement is met, and the operation efficiency is improved. And great advantages are achieved in the aspects of matching performance, machinability and assembling performance.

Description

Technical Field

[0001] 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

[0002] Treatments for liver cancer include surgical treatment, local ablation, transcatheter arterial chemoembolization, radiotherapy, and systemic therapy. Currently, surgical treatments such as medical water jets and scalpels are still the preferred method for liver cancer treatment.

[0003] 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. 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 preserved. The medical water jet instrument can thus roughly achieve the selective separation function.

[0004] However, as the field of medical surgery develops towards minimally invasive and sophisticated treatment, there is still no single method of liver resection that can fully meet the various surgical needs of liver resection, effectively control postoperative complications, and improve the five-year survival rate after surgery. Therefore, further innovation of existing medical technologies is imperative. Summary of the invention

[0005] 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 a 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, a gap being provided between an outer wall of the nozzle and an inner wall of the outer tube, a nozzle hole for outputting 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; a driving device, connected to at least a portion of the nozzle and driving the nozzle to move.

[0006] 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 tube body.

[0007] Distal end.

[0008] 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.

[0009] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, a central axis of the first distal portion and a central axis of the second distal portion are parallel.

[0010] 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.

[0011] For example, in a medical water jet instrument provided in at least one embodiment of the present disclosure, the plane where the end surface of the first distal nozzle is located is parallel to the plane where the second distal nozzle is located.

[0012] 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 shape relative to the second distal nozzle end face, so that the medical liquid can be sprayed along the second direction.

[0013] 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 surface of the first distal nozzle.

[0014] 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°.

[0015] 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 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 two dimensions in a circular direction around the central axis of the outer tube.

[0016] 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.

[0017] Compared with the prior art, the beneficial effects of at least one embodiment of the present disclosure include at least: 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 to be inclined 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

[0018] 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.

[0019] Figure 1 A cross-sectional view of a medical water jet instrument provided for some embodiments of the present disclosure;

[0020] Figure 2 A schematic diagram of the one-dimensional reciprocating swing of the nozzle portion of a medical water jet device provided in some embodiments of the present disclosure;

[0021] Figure 3 A schematic diagram of the two-dimensional circular oscillation of the nozzle portion of a medical water jet device provided in some embodiments of the present disclosure;

[0022] Figure 4-Figure 5 A schematic diagram of a structure in which both the outer tube and the nozzle are provided with elbows in some embodiments of the present disclosure, Figure 5 yes Figure 4 Left side view;

[0023] Figure 6-Figure 7 A schematic diagram of a structure in which both the outer tube and the nozzle are provided with oblique openings in some embodiments of the present disclosure, Figure 7 yes Figure 6 Left side view;

[0024] Figure 8-Figure 9 A schematic diagram of a structure in which an outer tube provided with an oblique opening and a nozzle provided with an oblique hole in some embodiments of the present disclosure is provided. Fig. 9 yes Figure 8 Left side view;

[0025] In the figure: 100-medical water jet instrument, 110-outer tube, 111-first tube body, 112-first distal end portion, 112a-first distal tube mouth end surface, 120-nozzle, 121-second tube body, 122-second distal end portion, 122a-second distal tube mouth end surface, 130-driving device. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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, not prone to bile leakage and effusion, low cost, and ideal operating environment.

[0030] The inventors of the present disclosure have found that the medical water jet instrument technology has great potential in the field of liver segmentation. For example, when the medical water jet instrument is working, it can complete the cutting or removal of liver parenchyma and the retention and exposure of luminal tissue in a cutting band with a certain width and length. 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 the 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 inventors of the present disclosure have also found that the axis of the handle, the axis of the outer tube, and the jet direction of the medical liquid in most medical water jet instruments are three parallel lines, which will lead to limited direction during surgical operations, thereby causing great difficulties for operators (such as doctors) in use, especially for use under laparoscopy.

[0031] The inventors of the present disclosure also discovered that if the nozzle portion of the medical water jet instrument rotates (i.e., the direction of the nozzle portion itself is deflected when the nozzle rotates, and 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 achieve in accordance with the operator's requirements.

[0032] At least one embodiment of the present disclosure provides a medical water jet instrument, including an outer tube, a nozzle and a driving device. The outer tube includes a first tube body extending along a first direction and a first distal end portion having a first distal tube mouth end face inclined to the first direction. The nozzle extends through the outer tube and is configured to input medical liquid at the proximal end, a gap is provided between the outer wall of the nozzle and the inner wall of the outer tube, a nozzle hole for outputting medical liquid is provided at the distal end of the nozzle, and the medical liquid is ejected along a second direction inclined to the first direction. The driving device is connected to at least a portion of the nozzle and drives the nozzle to move.

[0033] The medical water jet instrument of the above-mentioned embodiment of the present invention is designed to have the axis of the main body of the outer tube and the tube mouth of the outer tube to be inclined, 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 can be inclined at an angle to the central axis of at least a part of the outer tube. Therefore, the inclination angle design makes the operator's operation more flexible regardless of whether it is an open procedure or a laparoscopic procedure, which can not only meet the clinical functional requirements, but also achieve a technical effect with great advantages in matching, processability and assembly.

[0034] The structural scheme proposed in at least one embodiment of the present invention, firstly, meets the clinical functional requirement that the jet direction is deflected by a certain angle with the outer tube axis direction; secondly, meets the system's requirements for the structural movement of the instrument in the working state; in addition, it can also have better matching with the 5mm puncture device, better processability and assembly, and therefore, has better economic benefits.

[0035] The embodiments and examples of the present disclosure are described in detail below with reference to the accompanying drawings.

[0036] For the convenience of description, the embodiments of the present disclosure are Figure 1 The proximal end of the outer tube 110 of the medical water jet instrument 100 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 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.

[0037] 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.

[0038] Figure 1 A cross-sectional view of a medical water jet instrument provided for some embodiments of the present disclosure.

[0039] For example, Figure 1 As shown, at least one embodiment of the present disclosure provides a medical water jet instrument 100 comprising an outer tube 110, a nozzle 120 and a driving device 130. The nozzle 120 extends through the outer tube 110 and is configured to input pressurized medical liquid and allow the medical liquid to circulate, and there is a gap between the outer wall of the nozzle 120 and the inner wall of the outer tube 110. The nozzle 120 may also be referred to as an inner tube. The driving device 130 is connected to at least a portion of the nozzle 120 and drives the nozzle 120 to move, for example, the driving device 130 drives the distal end of the nozzle 120 to swing back and forth in one dimension relative to the outer tube 110 in the radial direction of the nozzle 120 or to swing in two dimensions around the central axis of the outer tube 110.

[0040] For example, the distal end of the nozzle 120 is provided with a nozzle hole ( Figure 1 The medical liquid is sprayed in a certain direction (e.g., the second direction described below) so as to achieve the selective separation of liver parenchyma and blood vessels and bile ducts in vivo by using the jet. For example, the jet formed by the embodiment of the present disclosure can efficiently complete the selective separation of flexible tissue and elastic tissue.

[0041] In some examples, the spray hole may 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 part and the nozzle part includes a spray hole), or the spray hole may be opened in a nozzle part fixedly installed at the distal end of the nozzle 120 ( Figure 1 The nozzle head portion is fixedly arranged on the distal end of the nozzle pipe 120 as another component independent of the nozzle pipe 120.

[0042] In some examples, the driving device 130 drives the nozzle 120 to move so as to drive the movement of the nozzle head portion at the distal end of the nozzle 120, and the movement of the nozzle head 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, etc.) under the drive of the driving device 130, and the movement is transmitted to the distal end of the nozzle 120 and the nozzle head portion at the distal end, so that the nozzle head portion performs corresponding movement, and therefore, the moving nozzle head portion causes the high-pressure jet ejected from its nozzle hole to perform an automatic scanning action.

[0043] It should be noted that since the specific design of the nozzle part and the nozzle hole is not the focus of the embodiment of the present disclosure, it will not be described here. For the clarity and conciseness of this article, the following mainly takes the nozzle hole directly opened at the far end of the nozzle 120 as an example for description, but the embodiment of the present disclosure is not limited to this, and this article will not be exhaustive or detailed.

[0044] For example, the inner diameter of the outer tube 110 of the medical water jet instrument 100 is greater 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 in 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 repeated here.

[0045] Figure 2 A schematic diagram of the one-dimensional reciprocating oscillation of the nozzle portion of a medical water jet instrument provided in some embodiments of the present disclosure. Figure 3 A schematic diagram of the two-dimensional circular oscillation of the nozzle portion of a medical water jet instrument provided in some embodiments of the present disclosure.

[0046] For example, Figure 2 and Figure 3As shown, the nozzle 120 is arranged inside the outer tube 110, and the solid circle on the left and the dashed circle on the right inside the outer tube 110 respectively represent possible positions of the nozzle part (and the nozzle hole) at the far end of the nozzle 120 at two movement moments, and 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.

[0047] For example, Figure 2 The example corresponds to the case 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 (it can also be said that the nozzle 120 oscillates in the outer tube 110). Figure 3 The example corresponds to the case where the distal end of the nozzle 120 swings in a two-dimensional circle around the central axis of the outer tube 110 in the radial direction of the nozzle 120 (it can also be said that the nozzle 120 performs a revolution-like swing in the outer tube 110). Figure 2 and Figure 3 It can be seen that when the distal end of the nozzle 120 is swinging, no matter what the path is, the direction of the nozzle part itself is not deflected, that is, the nozzle part does not rotate.

[0048] Figure 4-Figure 5 A schematic diagram of a structure in which both the outer tube and the nozzle are provided with elbows in some embodiments of the present disclosure, Figure 5 yes Figure 4 Left side view. Figure 6-Figure 7 A schematic diagram of a structure in which both the outer tube and the nozzle are provided with oblique openings in some embodiments of the present disclosure, Figure 7 yes Figure 6 Left side view. Figure 8-Figure 9 A schematic diagram of a structure in which an outer tube provided with an oblique opening and a nozzle provided with an oblique hole in some embodiments of the present disclosure is provided. Fig. 9 yes Figure 8 Left side view.

[0049] For example, Figure 4 , Figure 6 and Figure 8 As shown, the outer tube 110 includes a first tube body 111 extending along a first direction and a first distal end portion 112 having a first distal tube end surface 112a, and the plane where the first distal tube end surface 112a is located is inclined in the first direction. For example, the first direction corresponds to Figure 1 , Figure 4 , Figure 6 and Figure 8 For example, the distal end of the nozzle 120 is provided with a nozzle hole (not shown) for outputting the medical liquid, and the medical liquid is ejected along a second direction inclined to the first direction, for example, the second direction corresponds to Figure 4 , Figure 6 and Figure 8In the direction of arrow B on the drawing.

[0050] The medical water jet instrument of the above-mentioned embodiment of the present invention is designed to have the axis of the main body of the outer tube and the tube mouth of the outer tube to be inclined, so that the jet direction can be 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.

[0051] 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 extends along the first direction, which means that the central axis of this portion coincides with or is parallel to the first direction.

[0052] In some examples, the surface of the tissue to be treated is configured to be in contact with the first distal tube mouth end surface 112a of the outer tube 110. This is merely exemplary and is not a limitation of the embodiments of the present disclosure.

[0053] For example, Figure 4 and Figure 5 As shown, the first distal end portion 112 of the outer tube 110 is curved, that is, the first distal end portion 112 of the outer tube 110 is not coaxial with the first tube body 111 of the outer tube 110 .

[0054] For example, Figure 4 and Figure 5 As shown, 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 .

[0055] In some examples, the outer tube 110 and the nozzle 120 are straight tubes and have good cylindricity (for example, when the expected state is reached). For example, some embodiments of the present disclosure achieve the state of the first tube body 111 and the second tube body 121 maintaining a nearly straight tube state during surgery by designing the length and diameter of the outer tube 110 and the nozzle 120 and the material of the tube body. 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 finalized bending. Therefore, for the outer tube 110 and the nozzle 120, they are not curved as a whole during surgery, but are local curved at the distal end.

[0056] For example, Figure 4As shown, the first distal nozzle 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 nozzle 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 nozzle 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 nozzle 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.

[0057] For example, in Figure 4 In the example, the second direction corresponding to the jet injection is perpendicular to the first distal nozzle end surface 112a of the outer tube 110.

[0058] 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.

[0059] For example, Figure 4 As shown, the central axis of the first distal end 112 of the outer tube 110 is parallel to the central axis of the second distal end 122 of the nozzle 120, that is, the curvature of the first distal end 112 of the outer tube 110 is the same as the curvature of the second distal end 122 of the nozzle 120 and the bending direction is the same. Exemplarily, the central axis of the first distal end 112 and the central axis of the second distal end 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 the clinical functional requirements, but also increase the advantages in matching, processing, and assembly.

[0060] For example, Figure 6 and Figure 7 As shown, 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 as a whole extends along the first direction and no elbow is arranged 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.

[0061] 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 one 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 is not a limitation of 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 directly connected, they will not be exhaustively listed and repeated here. It should be noted that the interpretation of the continuity of some other embodiments of the present disclosure can also refer to the description here, and will not be repeated here.

[0062] For example, Figure 6 and Figure 7 As shown, the nozzle 120 is arranged to extend along the first direction (that is, the nozzle 120 as a whole extends along the first direction and no elbow is arranged 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, and the second distal nozzle end face 122a is arranged obliquely with respect 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.

[0063] For example, in Figure 6 In the example, the second direction corresponding to the jet is perpendicular to the first distal nozzle end surface 112a of the outer tube 110.

[0064] In some examples, the first distal nozzle end face 112a of the outer tube 110 can be beveled to obtain the corresponding required beveled shape, and the second distal nozzle end face 122a of the nozzle 120 can also be beveled to obtain the corresponding required beveled shape. For example, the nozzle hole at the distal end of the nozzle 120 is a straight hole, and the end plane where the straight hole is located can be fixed on the bevel of the nozzle 120. This is only exemplary and is not a limitation of the embodiments of the present disclosure.

[0065] The embodiments of the present disclosure combine the outer tube oblique mouth and the nozzle oblique mouth to deflect the jet direction at a certain angle to the outer tube axial direction and to make the tube mouth fit the tissue surface, which can not only meet the clinical functional requirements, but also have better matching with the 5mm puncture device (for example, the oblique mouth design of the outer tube 110 has no adverse effect on passing through the 5mm puncture device), better processability (for example, the processing of the outer tube and the nozzle is simple) and assembly (for example, the nozzle has fewer axial and circumferential constraints when moving in the outer tube, making the assembly process relatively simple).

[0066] For example, Figure 6 As shown, 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 first distal nozzle end face 112a of the outer tube 110 and the slope of the second distal nozzle end face 122a of the nozzle 120 are the same as the slope size 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.

[0067] For example, Figure 8 and Fig. 9 As shown, 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 as a whole extends along the first direction and no elbow is arranged 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.

[0068] For example, Figure 8 and Fig. 9 As shown, the nozzle 120 is configured to extend along the first direction (i.e., the nozzle 120 as a whole extends along the first direction and no elbow is provided at the distal end of the nozzle 120, and the central axis of the entire nozzle 120 is along the first direction), 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 (the nozzle end face at the distal end of the nozzle 120) is perpendicular to the first direction, that is, the second distal nozzle end face 122a is a straight mouth shape perpendicular to the first direction, and the spray hole is configured to be an oblique hole shape relative 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 spray hole) is not parallel to the first direction of the nozzle 120 but is inclined. In other words, the axis of the spray hole is not perpendicular to the second distal nozzle end face 122a.

[0069] The embodiments of the present disclosure combine the outer tube oblique mouth and the inner tube oblique hole to deflect the jet direction at a certain angle to the outer tube axis direction and to make the tube mouth fit the tissue surface, which can not only meet the clinical functional requirements, but also have better matching with the 5mm puncture device (for example, the oblique mouth design of the outer tube 110 has no adverse effect on passing through the 5mm puncture device), better processability (for example, the processing of the outer tube and the nozzle is simple) and assembly (for example, the nozzle has fewer axial and circumferential constraints when moving in the outer tube, making the assembly process relatively simple).

[0070] Some embodiments of the present disclosure use a straight nozzle end surface (such as Figure 8 The vertical end face shown in the figure, for example, the cross section of the vertical end face is a perfect circle) is formed by drilling an oblique hole in the form of an oblique hole-shaped spray hole. In this way, since 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 the outer tube extending along the first direction. Therefore, the embodiment of the present disclosure is very simple in the process of processing and fixing.

[0071] For example, in Figure 8 In the example, the second direction corresponding to the jet injection is perpendicular to the first distal nozzle end surface 112a of the outer tube 110.

[0072] In some examples, the acute angle between the second direction and the first direction is 10° to 50°. In this way, the embodiments of the present disclosure can well meet the clinical functional needs and well meet the structural movement requirements of the device in the working state. It should be noted that this is only exemplary and is not a limitation of the embodiments of the present disclosure. It can be freely adjusted according to the actual application needs, and will not be exhaustively listed and repeated here.

[0073] 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 distal portion of the nozzle 120 (such as the second distal portion of the nozzle 120, for example Figure 4 The spray hole on the second distal end portion 122 of the nozzle 120 shown in the figure performs a one-dimensional reciprocating swing relative to the outer tube 110 in the radial direction of the outer tube 110 (also called a horizontal swing) or a two-dimensional circular swing around the central axis direction of the outer tube 110 (also called a revolving swing).

[0074] 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 outer tube and / or the inner tube are cleverly designed to make the direction of the jet form an inclined angle with the axis of the main body of the outer 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 nozzle jet deflection that meets the needs of the operator, well meet the clinical functional requirements, and meet the system's structural requirements for the instrument.

[0075] 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.

[0076] There are a few points to note:

[0077] (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.

[0078] (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.

[0079] 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: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 configured 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 configured to be an inclined hole relative to the second distal nozzle end face, so that the medical liquid is sprayed along the second direction.

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

9. The medical water jet device according to any one of claims 1 to 7, characterized in that: 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, characterized in that: 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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