CN117426837A - Medical water sword tool bit - Google Patents

Medical water sword tool bit Download PDF

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Publication number
CN117426837A
CN117426837A CN202311364813.4A CN202311364813A CN117426837A CN 117426837 A CN117426837 A CN 117426837A CN 202311364813 A CN202311364813 A CN 202311364813A CN 117426837 A CN117426837 A CN 117426837A
Authority
CN
China
Prior art keywords
tube
pressure
water jet
medical water
proximal end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311364813.4A
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Chinese (zh)
Inventor
孙光宇
包全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Haizhuo Kesai Medical Co ltd
Original Assignee
Shenzhen Haizhuo Kesai Medical Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Haizhuo Kesai Medical Co ltd filed Critical Shenzhen Haizhuo Kesai Medical Co ltd
Priority to CN202311364813.4A priority Critical patent/CN117426837A/en
Publication of CN117426837A publication Critical patent/CN117426837A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/87—Details of the aspiration tip, not otherwise provided for

Abstract

The invention relates to the technical field of medical appliances, in particular to a medical water jet scalpel head, which is provided with a distal end and a proximal end, and comprises: a return tube having a proximal sidewall formed with at least one window; and a pressure tube disposed in the return tube, a rounded head being provided at an end of a proximal end of the pressure tube to form a closed state of the proximal end of the pressure tube, a nozzle being provided at a side wall of the proximal end of the pressure tube, the nozzle being configured to form a liquid jet when high-pressure liquid is ejected from the nozzle, the liquid jet being formed with an effective cutting area having a negative pressure suction force inside the return tube, the window being configured to aspirate tissue into the return tube to perform ablation when the effective cutting area is in a negative pressure state. The medical water jet cutter head is simple in structure, the existing nozzle structure is replaced by the spray holes, the manufacturing cost can be reduced, the space can be compact by adopting the spray holes, the diameter of the return pipe can be reduced, and the miniaturization of the medical water jet cutter head is realized.

Description

Medical water sword tool bit
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical water jet scalpel head.
Background
The medical water jet scalpel is mainly used for destroying biological tissues by impacting high-speed superfine jet water beams formed by spraying physiological saline so as to realize tissue separation, has the advantages of small wound, less bleeding, high selectivity and the like, and is widely applied to various operations. For the treatment of chronic inflammatory or more related tissue conditions, safe removal and uptake of diseased tissue while leaving intact healthy primary tissue, selective removal of soft tissue therein, while medical water knives protecting healthy tissue from injury are the best option for patients.
However, the existing medical water jet knife still adopts a nozzle to realize the injection of high-speed superfine jet water beams, and the design key feature is that the nozzle and the pressure pipe are integrated, so that the size of the knife head is limited by the structure of the nozzle, the miniaturization cannot be realized, and the structural design of the pipeline is complex due to the arrangement of the nozzle, so that the manufacturing cost is high.
Disclosure of Invention
The invention aims to solve the technical problems that: how to realize the miniaturization of the medical tool bit and reduce the manufacturing cost.
In order to solve the above technical problems, the present invention provides a medical water jet scalpel head, which has a distal end and a proximal end, comprising:
a return tube having a proximal sidewall formed with at least one window; and
the pressure tube is arranged in the return tube, a round head is arranged at the end part of the proximal end of the pressure tube so that the proximal end of the pressure tube forms a closed state, a spray hole is arranged on the side wall of the proximal end of the pressure tube, the spray hole is configured to form a liquid jet when high-pressure liquid is sprayed out of the spray hole, an effective cutting area with negative pressure suction force is formed on the inner side of the return tube by the liquid jet, and the window is configured to suck tissues into the return tube to be resected when the effective cutting area is in a negative pressure state.
Further preferably, the proximal end of the pressure tube is bent in the return tube to form a first bend, and the nozzle is provided in a side wall of the first bend.
Further preferably, the length of the effective cutting area satisfies the following formula:
in the formula (1), a represents a bending angle of the first bending portion, b represents a radial inclination of the nozzle hole with respect to the first bending portion, and L 1 Representing the distance of the orifice from the end of the proximal end of the pressure tube.
Further preferably, the bending angle a of the first bending portion satisfies: a is more than or equal to 0 and less than or equal to 90 degrees.
Further preferably, the radial inclination b of the nozzle hole with respect to the first bending portion satisfies: b is more than or equal to 0 and less than or equal to 90 degrees.
Further preferably, the diameter of the return tube satisfies the following formula:
in the formula (2), d represents the diameter of the pressure pipe, L 0 Representing the axial length of the first bend.
Further preferably, the pressure tube diameter d satisfies: d is more than 0mm and less than or equal to 1mm.
Further preferably, the diameter D of the return pipe satisfies: d is more than 0.5mm and less than or equal to 10mm.
Further preferably, the diameter of the nozzle hole is 0 to 0.3mm.
Further preferably, the distal end of the return tube is adapted to be connected to a negative pressure suction device and the distal end of the pressure tube is adapted to be connected to a pressurizing device.
Compared with the prior art, the medical water jet scalpel head has the beneficial effects that: the medical water jet scalpel head has a simple structure, the existing nozzle structure is replaced by the spray hole, the spray hole can be formed by adopting a drilling mode, the cost is low, the drilling can greatly simplify the manufacturing process, the complicated design that the nozzle and the pressure pipe are integrated is not required to be considered, the miniaturization of the pressure pipe can be realized after the spray hole is adopted to replace the nozzle, the miniaturization of the medical water jet scalpel head can be realized, so that the medical water jet scalpel head can more effectively and selectively cut and remove pathological tendon tissues, and the postoperative rehabilitation with rapider pain and less pain can be realized; in addition, the jet orifice is arranged on the side wall of the proximal end of the pressure pipe, so that the pressure pipe can realize backflow without 180-degree rotary bending, further space compactness can be realized, the diameter of the backflow pipe can be reduced, and the miniaturization of the medical water jet scalpel head is realized.
Drawings
Fig. 1 and 2 are schematic structural views of embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of embodiment 2 of the present invention.
Fig. 4 is a cross-sectional view of embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of embodiment 3 of the present invention.
Fig. 6 is a cross-sectional view of embodiment 3 of the present invention.
Fig. 7 is a schematic structural view of embodiment 4 of the present invention.
Fig. 8 is a cross-sectional view of embodiment 4 of the present invention.
In the figure:
10. a return pipe; 11. a window;
20. a pressure pipe; 21. round head; 22. a spray hole; 23. an effective cutting area; 24. a first bending part.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "axial," "radial," "horizontal," "vertical," "parallel," "intermediate," "proximal," "distal," "proximal," "outer," "sidewall," "length," "width," "center," and the like are used herein as directions or positional relationships based on the directions or positional relationships shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
It should be noted that, the medical water knife bit provided by the embodiment of the invention has a distal end and a proximal end, wherein the "proximal end" refers to an end of the medical water knife bit for extending into a tissue to be cut, and the "distal end" refers to an end of the medical water knife bit for introducing high-pressure liquid or an end for being held by medical staff.
Example 1
As shown in fig. 1 and 2, embodiment 1 provides a medical water jet scalpel head comprising a return tube 10 and a pressure tube 20, wherein at least one window 11 is formed in a side wall of a proximal end of the return tube 10, the pressure tube 20 is disposed in the return tube 10, a rounded head 21 is disposed at an end of the proximal end of the pressure tube 20 to form a closed state at the proximal end of the pressure tube 20, and a jet orifice 22 is disposed in a side wall of the proximal end of the pressure tube 20.
It should be noted that, in the above example, "at least one" means that the number of the windows 11 may be 1, 2, 3 or 4, when the number of the windows 11 is 1, the nozzle holes 22 are disposed corresponding to the windows 11, and when the number of the windows 11 is greater than 1, the plurality of windows 11 should be disposed on the same cross section of the return tube 10, and it should be noted that "cross section" refers to a section perpendicular to the axis of the return tube 10 to ensure that each window 11 is in a negative pressure state and can suck tissue into the return tube 10.
In the present embodiment, the nozzle hole 22 is configured to form a liquid jet when high-pressure liquid is ejected from the nozzle hole 22, the liquid jet is formed with an effective cutting area 23 in a negative pressure suction force inside the return pipe 10, and the window 11 is configured to suck tissue into the return pipe 10 to perform ablation when the effective cutting area 23 is in a negative pressure state.
In some embodiments, the outer wall of the pressure tube 20 and the inner wall of the return tube 10 are fixedly connected in a fitting manner to form a fixed whole, so that the shape of the pressure tube 20 is prevented from being changed or loosening after collision with tissues, the position of the spray hole 22 is ensured to be unchanged all the time, and further, the tissues are reasonably and efficiently cut, so that target tissues are separated, and the aim of effectively cutting the tissues is fulfilled.
In some embodiments, the proximal end of the return tube 10 may be configured in a tapered or spatula configuration, and may be configured in a hemispherical configuration, and may be used as a scalpel when the proximal end of the return tube 10 is configured in a spatula configuration, enabling the surgical site to be cut first exposing the portion requiring aspiration of the fluid jet for cutting, and reducing the resistance to movement of the proximal end of the return tube 10 within tissue when the proximal end of the return tube 10 is configured in a tapered or hemispherical configuration, enabling selective removal and ablation of pathological tendon tissue while preserving healthy tissue.
In this embodiment, the proximal end of the pressure tube 20 is bent within the return tube 10 to form a first bend 24, with the orifice 22 being provided in a sidewall of the first bend 24.
In some embodiments, the length of the effective cutting area 23 satisfies the following equation:
in the formula (1), a represents a bending angle of the first bending portion, b represents a radial inclination of the nozzle hole with respect to the first bending portion, and L 1 Indicating the distance of the orifice from the end of the proximal end of the pressure tube.
In the above embodiment, the bending angle a of the first bending portion 24 satisfies: 0.ltoreq.a.ltoreq.90 °, for example, a may be 0 °, 1 °, 5 °, 10 °, 30 °, 45 °, 60 °, 75 °, 85 °, 90 ° or the like; the radial inclination b of the nozzle hole 22 with respect to the first folded portion 24 satisfies: b is 0.ltoreq.90 °, and similarly b may be 0 °, 1 °, 5 °, 10 °, 30 °, 45 °, 60 °, 75 °, 85 °, 90 °, etc., in this embodiment, a=15°, b=45° is preferable.
In some embodiments, the diameter of the return tube 10 satisfies the following equation:
in the formula (2), d represents the diameter of the pressure pipe, L 0 The axial length of the first bending portion is shown.
In the above embodiment, the diameter d of the pressure tube 20 satisfies: d is more than 0mm and less than or equal to 1mm; the diameter D of the return pipe 10 satisfies: d is more than or equal to 0.5mm and less than or equal to 10mm.
In other embodiments, the diameter of the orifice 22 is 0 to 0.3mm.
In some embodiments, the distal end of the return tube 10 is adapted to be connected to a negative pressure suction device and the distal end of the pressure tube 20 is adapted to be connected to a pressurizing device. The pressurizing device is used for pressurizing physiological saline or other physiological compatible liquid into high-pressure liquid, introducing the high-pressure liquid into the pressure tube 20 and then spraying the high-pressure liquid through the spray holes 22, so that the spray holes 22 are configured to form liquid jet streams when the high-pressure liquid is sprayed out of the spray holes 22, and the liquid jet streams have high flow velocity, so that tissues can be effectively and safely cut.
Therefore, the present embodiment replaces the existing nozzle structure with the spray hole 22, the spray hole can be drilled, the cost is low, the drilling can greatly simplify the manufacturing process, the complicated design of integrating the nozzle and the pressure pipe is not required to be considered, the miniaturization of the pressure pipe 20 can be realized after the spray hole 22 is adopted to replace the nozzle, and further the miniaturization of the medical water jet scalpel head can be realized, so that the medical water jet scalpel head can more effectively and selectively cut and remove pathological tendon tissues, and the postoperative rehabilitation with faster pain and less pain can be realized; in addition, the jet orifice is disposed on the side wall of the proximal end of the pressure tube 20, and the water jet knife head prepared by combining the formula (1) and the formula (2) can realize backflow without 180-degree rotary bending of the pressure tube 20, further realize space compactness, reduce the diameter of the backflow tube 10, and realize miniaturization of the medical water jet knife head.
Example 2
Embodiment 2 provides a medical water jet scalpel head, which is different from embodiment 1 in that:
as shown in fig. 3 and 4, the proximal end of the return tube 10 is provided with a scraper structure, which can be used as a scalpel, and can cut the surgical site first to expose the part requiring the suction cutting of the liquid jet, and can selectively cut and remove pathological tendon tissues while preserving healthy tissues.
In the present embodiment, the bending angle a=30° of the first bending portion 24, and the radial inclination b=0° of the nozzle hole 22 with respect to the first bending portion 24, that is, the axial direction of the nozzle hole 22 is parallel to the radial direction of the first bending portion 24, or the axial direction of the nozzle hole 22 is perpendicular to the axial direction of the first bending portion 24.
In the present embodiment, the number of the windows 11 provided on the return pipe 10 is 2, and the 2 windows 11 are symmetrically provided with respect to the nozzle hole 22, so that when the high-pressure liquid jet is ejected from the nozzle hole 22, the liquid jet is formed with a negative pressure suction force inside the return pipe 10, and the tissue to be resected is sucked into the effective cutting area 23 from the windows 11 on both sides by using the negative pressure suction force, thereby achieving efficient resection of the tissue to be resected.
In the present embodiment, the 2 windows 11 should be provided on the same cross section of the return tube 10, and it should be noted that "cross section" refers to a section perpendicular to the axis of the return tube 10, so as to ensure that each window 11 is in a negative pressure state and is capable of sucking tissue into the return tube 10.
Example 3
Embodiment 3 provides a medical water jet scalpel head, which is different from embodiment 1 in that:
as shown in fig. 5 and 6, in the present embodiment, the bending angle a=90° of the first bending portion 24, and the radial inclination b=0° of the nozzle hole 22 with respect to the first bending portion 24, that is, the axial direction of the nozzle hole 22 is parallel to the radial direction of the first bending portion 24, or the axial direction of the nozzle hole 22 is perpendicular to the axial direction of the first bending portion 24.
In this embodiment, when the bending angle a=90° of the first bending portion 24 is set to be equal to the bending angle a=90° so as to fix the pressure tube 20, for this purpose, the end portion of the proximal end of the return tube 10 is set to be a planar structure, and the transition portion between the end portion and the peripheral wall is provided with a rounded corner, so that the first bending portion 24 can be matched and attached to the planar structure of the end portion, thereby increasing the contact area between the first bending portion 24 and the return tube 10, further increasing the connection strength between the first bending portion and the return tube, avoiding the shape change or loosening after the collision between the pressure tube 20 and the tissue, and further realizing reasonable and efficient cutting of the tissue, so as to separate the target tissue and achieve the purpose of effectively cutting the tissue.
In this embodiment, the number of the windows 11 provided on the return pipe 10 is 1, the windows 11 are opposite to the pressure pipe 20, and the windows 11 are extended along the axial direction of the return pipe 10, so that the high-pressure liquid jet ejected from the nozzle 22 can be placed under the windows 11, so as to achieve more efficient negative pressure adsorption and excision effects.
Compared with the nozzle structure, the bending angle a=90° of the first bending portion 24 of the embodiment is that the pressure tube 20 does not need to be bent in a 180 ° rotary way, and the backflow can be realized through 90 ° bending, so that the space is compact, the diameter of the backflow tube is reduced to be less than half of the original diameter, and the outer diameter of the water jet cutter head is miniaturized; however, compared to embodiment 1, the diameter D of the return pipe 10 is slightly increased due to the bending angle a=90° of the first bending portion 24, so that the outside diameter of the water jet cutter head is not as small as in embodiment 1.
Example 4
Embodiment 4 provides a medical water jet scalpel head, which is different from embodiment 1 in that:
as shown in fig. 7 and 8, in the present embodiment, the bending angle a=0° of the first bending portion 24, that is, the axial direction of the first bending portion 24 and the axial direction of the return pipe 10 are parallel (the pressure pipe is a straight pipe), and the radial inclination 0 < b < 90 ° of the nozzle hole 22 with respect to the first bending portion 24.
In the present embodiment, the number of the windows 11 provided on the return pipe 10 is 2, and the 2 windows 11 are symmetrically provided with respect to the nozzle hole 22, so that when the high-pressure liquid jet is ejected from the nozzle hole 22, the liquid jet is formed with a negative pressure suction force inside the return pipe 10, and the tissue to be resected is sucked into the effective cutting area 23 from the windows 11 on both sides by using the negative pressure suction force, thereby achieving efficient resection of the tissue to be resected.
In the present embodiment, the 2 windows 11 are symmetrically disposed at both sides of the pressure tube 20, and the inclined direction of the windows 11 should be consistent with the radial inclination b of the nozzle holes 22, so that the most efficient negative pressure adsorption and ablation effect can be achieved.
Since the bending angle a=0° of the first bending portion 24 of the present embodiment, the diameter D of the return pipe 10 can be designed smaller than that of embodiment 1, so that the outside diameter of the water jet cutter head can be more miniaturized.
In the present embodiment, the end of the proximal end of the return tube 10 is arranged in a hemispherical structure, which can reduce the resistance of the proximal end of the return tube 10 to move within tissue, and can selectively resect and remove pathological tendon tissue while preserving healthy tissue.
The working process of the invention is as follows: the pressurizing device pressurizes physiological saline or other physiologically compatible liquid into high-pressure liquid and introduces the high-pressure liquid into the pressure pipe 20, and then the high-pressure liquid is sprayed out through the spray hole 22, so that the spray hole 22 is configured to form a liquid jet when the high-pressure liquid is sprayed out from the spray hole 22, the liquid jet has a high flow speed, the tissue can be effectively and safely cut, when the spray hole 22 sprays out the liquid jet, an effective cutting area 23 with negative pressure suction force is formed in the interior of the liquid jet, so that the tissue is sucked into the return pipe 10 through the window 11 for cutting, and the cut tissue flows back into the collecting device along the return pipe 10 under the action of the negative pressure suction device.
In summary, the medical water jet scalpel head provided by the embodiment of the invention has a simple structure, the spray hole 22 is arranged to replace the existing nozzle structure, the spray hole can be formed by adopting a drilling mode, the cost is low, the drilling can greatly simplify the manufacturing process, the complicated design of integrating the nozzle and the pressure pipe is not required to be considered, the miniaturization of the pressure pipe 20 can be realized after the spray hole 22 is adopted to replace the nozzle, the miniaturization of the medical water jet scalpel head can be realized, so that the medical water jet scalpel head can more effectively and selectively cut and remove pathological tendon tissues, and the postoperative rehabilitation with rapider pain and less pain can be realized; in addition, the jet orifice is arranged on the side wall of the proximal end of the pressure tube 20, so that the pressure tube 20 can realize backflow without 180-degree rotary bending, further space compactness can be realized, the diameter of the backflow tube 10 can be reduced, and the miniaturization of the medical water jet scalpel head can be realized.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention. While there has been shown and described what are at present considered to be fundamental principles, main features and advantages of the present invention, it will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing preferred embodiments, and that the examples should be considered as exemplary and not limiting, the scope of the present invention being defined by the appended claims rather than by the foregoing description, and it is therefore intended to include within the invention all changes which fall within the meaning and range of equivalency of the claims.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail herein, but rather is provided for the purpose of enabling those skilled in the art to make and use the embodiments described herein.

Claims (10)

1. A medical water jet blade head having a distal end and a proximal end, comprising:
a return tube having a proximal sidewall formed with at least one window; and
the pressure tube is arranged in the return tube, a round head is arranged at the end part of the proximal end of the pressure tube so that the proximal end of the pressure tube forms a closed state, a spray hole is arranged on the side wall of the proximal end of the pressure tube, the spray hole is configured to form a liquid jet when high-pressure liquid is sprayed out of the spray hole, an effective cutting area with negative pressure suction force is formed on the inner side of the return tube by the liquid jet, and the window is configured to suck tissues into the return tube to be resected when the effective cutting area is in a negative pressure state.
2. The medical water jet scalpel head of claim 1, wherein the proximal end of the pressure tube is bent within the return tube to form a first bend, and the nozzle is provided in a sidewall of the first bend.
3. The medical water jet cutter head according to claim 2, wherein the length of the effective cutting area satisfies the following formula:
in the formula (1), a represents a bending angle of the first bending portion, b represents a radial inclination of the nozzle hole with respect to the first bending portion, and L 1 Representing the distance of the orifice from the end of the proximal end of the pressure tube.
4. A medical water jet scalpel head as claimed in claim 3 wherein the angle of bending a of the first bending portion satisfies: a is more than or equal to 0 and less than or equal to 90 degrees.
5. A medical water jet scalpel head as claimed in claim 3 wherein the radial inclination b of the nozzle orifice relative to the first bend satisfies: b is more than or equal to 0 and less than or equal to 90 degrees.
6. A medical water jet scalpel head as claimed in claim 3 wherein the diameter of the return tube satisfies the formula:
in the formula (2), d represents the diameter of the pressure pipe, L 0 Representing the axial length of the first bend.
7. A medical water jet scalpel head as in claim 6 wherein said pressure tube diameter d satisfies: d is more than 0mm and less than or equal to 1mm.
8. A medical water jet scalpel head as in claim 6 wherein the diameter D of the return tube satisfies: d is more than 0.5mm and less than or equal to 10mm.
9. The medical water jet scalpel head according to claim 1, wherein the diameter of the jet hole is 0-0.3 mm.
10. A medical water jet scalpel head as in claim 1 wherein the distal end of the return tube is adapted to be connected to a negative pressure suction device and the distal end of the pressure tube is adapted to be connected to a pressurizing device.
CN202311364813.4A 2023-10-20 2023-10-20 Medical water sword tool bit Pending CN117426837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311364813.4A CN117426837A (en) 2023-10-20 2023-10-20 Medical water sword tool bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311364813.4A CN117426837A (en) 2023-10-20 2023-10-20 Medical water sword tool bit

Publications (1)

Publication Number Publication Date
CN117426837A true CN117426837A (en) 2024-01-23

Family

ID=89552651

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311364813.4A Pending CN117426837A (en) 2023-10-20 2023-10-20 Medical water sword tool bit

Country Status (1)

Country Link
CN (1) CN117426837A (en)

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