CN117017436A - Medical water sword tool bit and liposuction equipment - Google Patents

Abstract

The invention relates to the technical field of medical appliances, and particularly discloses a medical water jet scalpel head and liposuction equipment, which comprises a pressure pipe and a return pipe, wherein a high-pressure passage is arranged along the axial direction of the pressure pipe, an injection hole communicated with the high-pressure passage is formed at the proximal end of the pressure pipe, high-pressure liquid is introduced into the high-pressure passage at the distal end of the pressure pipe, and the injection hole is configured to form liquid jet when the high-pressure liquid is injected from the injection hole; the return pipe is provided with a return passage along the axial direction thereof, the pressure pipe is arranged in the return passage, the peripheral wall of the proximal end of the return pipe is provided with an ejection port and at least one suction port, the suction port is communicated with the return passage, and the ejection port faces the ejection port at an inclination angle, so that a high-pressure jet cutting area arranged between the ejection port and the suction port is formed outside the return pipe by the liquid jet. The invention expands the tissue separating range of the water knife to the area outside the tube so as to realize the maximum action area of the water jet, reasonably separates the target tissue and achieves the aims of effectively cutting and removing the tissue.

Description

Medical water sword tool bit and liposuction equipment

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical water jet scalpel head and a liposuction device.

Background

Liposuction surgery is a fat removal procedure used in plastic surgery. With the development and popularity of liposuction, various auxiliary liposuction techniques are inoculated, and the hydrodynamic liposuction technique is a new auxiliary liposuction technique in recent years. The hydrodynamic auxiliary liposuction is a technology for cutting and loosening fat cells by using high-pressure fan-shaped thin-layer water flow, sucking fat and liquid by using a negative pressure technology, namely, a technology that pressurized liquid forms a liquid jet flow from a nozzle through a pressure pipe, tissue is cut by using the suction force of the high-speed liquid jet flow, and the cut tissue flows into an aspiration pipe along with the liquid and is discharged. The medical water knife utilizes the hydrodynamic liposuction technology, and the biological tissues are damaged by the impact of the high-speed superfine jet water beam to realize tissue separation, so that the medical water knife has the advantages of small wound, less bleeding, high selectivity and the like, and is also applied to liposuction operation.

However, the water jet flow path of the existing medical water jet knife is usually arranged in a pipe, so that the cutting range of the water jet knife is limited to be only in the area in the pipe, the maximum acting area of the water jet flow is smaller, the effective cutting of the area outside the pipe cannot be performed, the risk that tissue is not thoroughly removed in the pipe cutting exists, and the postoperative rehabilitation difficulty is increased.

Disclosure of Invention

The purpose of the invention is that: how to expand the tissue separating range of the water knife to the area outside the tube so as to realize the maximum action area of the water jet, thereby reasonably separating the target tissue and achieving the aim of effectively cutting and removing the tissue.

In order to solve the above technical problems, the present invention provides a medical water jet scalpel head, which has a proximal end and a distal end, comprising:

a pressure tube having a proximal end and a distal end, the pressure tube being axially provided with a high pressure passage, the proximal end of the pressure tube being formed with an injection orifice in communication with the high pressure passage, the distal end of the pressure tube being for passing high pressure liquid into the high pressure passage, the injection orifice being configured to form a liquid jet when the high pressure liquid is injected from the injection orifice; and

the return pipe is axially provided with a return passage, the pressure pipe is arranged in the return passage, the peripheral wall of the proximal end of the return pipe is provided with an ejection port and at least one suction port, the suction port is communicated with the return passage, the ejection port faces the ejection port at an inclination angle, so that a liquid jet forms a high-pressure jet cutting area arranged between the ejection port and the suction port outside the return pipe, and the suction port is configured to pump away tissue of the high-pressure jet cutting area when the return passage is in a negative pressure state.

Further preferably, the proximal end of the pressure pipe is bent inside the proximal end of the return pipe to form a first bent portion, the proximal end of the first bent portion is provided with a first straight pipe portion oriented toward the ejection port at an inclination angle, and the ejection port is opened at an end portion of the proximal end of the first straight pipe portion.

Further preferably, the axial direction of the first straight pipe portion intersects the axial direction of the return pipe such that the liquid jet direction of the injection hole forms an inclination angle θ with the axial direction of the return pipe;

wherein θ satisfies 0 ° < θ < 90 °.

Further preferably, the proximal end of the pressure tube is bent to one side of the ejection port to form a second bent portion, the ejection hole is provided on a side wall of the second bent portion, the ejection hole faces the ejection port, and a liquid jet direction of the ejection hole is perpendicular to an axial direction of the second bent portion.

Further preferably, an axial direction of the second bending portion forms an inclination angle β with an axial direction of the return pipe, and a liquid jet direction of the injection hole forms an inclination angle α with the axial direction of the return pipe;

wherein β, α satisfy β+α=90°.

Further preferably, a side wall of the proximal end of the return pipe forms a first inclined surface having an inclination angle β, the first inclined surface is disposed opposite to the ejection port, and an outer wall of the second bent portion is fitted to the first inclined surface.

Further preferably, the proximal end of the pressure tube is parallel to the proximal end of the return tube, the injection hole is obliquely arranged on the side wall of the pressure tube, the liquid jet direction of the injection hole faces the injection hole, and the liquid jet direction of the injection hole forms an inclination angle gamma with the axial direction of the pressure tube;

wherein, gamma satisfies 0 DEG < gamma < 90 deg.

It is further preferred that the end of the proximal end of the return tube forms a second slope with an inclination angle gamma, which is parallel to the liquid jet direction of the jet orifice.

Further preferably, the method further comprises:

and the baffle plate is arranged in the backflow passage, is arranged between the ejection opening and the suction opening and is used for blocking the communication between the ejection opening and the backflow passage.

The invention also provides a liposuction device, which comprises the medical water jet scalpel head and further comprises:

a pressurizing pump, which is communicated with the distal end of the pressure pipe and is used for pressurizing the liquid and then conveying the liquid to the high-pressure passage; and

and the negative pressure suction device is arranged at the distal end of the return pipe and is communicated with the return passage and used for controlling the negative pressure value of the suction port to suck the tissue.

Compared with the prior art, the medical water jet scalpel head and the liposuction device have the beneficial effects that:

a medical water jet cutter head is characterized in that an injection hole is formed at the proximal end of a pressure pipe, the injection hole faces the injection hole at an inclination angle, a liquid jet is formed when high-pressure liquid is injected from the injection hole, a high-pressure jet cutting area arranged between the injection hole and a suction inlet can be formed at the outer side of a return pipe, namely, the range of a water jet separating tissue is expanded to an outer area of the pipe, so that the maximum action area of the water jet is realized, the tissue is reasonably and efficiently cut, the target tissue is conveniently separated, the aim of effectively cutting the tissue is achieved, in addition, the cut tissue in the high-pressure jet cutting area can be timely pumped away when the suction inlet is in a negative pressure state, and the cleaning effect of the cut tissue is guaranteed, so that the aim of effectively cleaning the tissue is achieved.

A liposuction device is characterized in that a pressurizing pump is used for pressurizing liquid and then introducing the liquid into a high-pressure passage, a jet hole is used for jetting the liquid to form a liquid jet so as to realize cutting and separating of target tissues in an external region of the tube, and a negative pressure suction device can suck the tissues in the high-pressure jet cutting region through a suction inlet, so that a better postoperative rehabilitation effect can be obtained.

Drawings

Fig. 1 is a schematic structural view of a medical water jet scalpel head according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a medical water jet scalpel head according to embodiment 2 of the present invention.

Fig. 3 is a schematic view showing the structure of a return pipe according to embodiment 2 of the present invention.

Fig. 4 is a schematic structural view of the pressure tube according to embodiment 2 of the present invention.

Fig. 5 is a schematic structural view of a medical water jet scalpel head according to embodiment 3 of the present invention.

Fig. 6 is a schematic structural view of a medical water jet scalpel head according to embodiment 4 of the present invention.

Fig. 7 is a schematic structural view of a medical water jet scalpel head according to embodiment 5 of the present invention.

Fig. 8 is a schematic structural diagram of a liposuction apparatus according to embodiment 6 of the present invention.

In the figure:

10. a pressure pipe; 11. a high pressure passage; 12. an injection hole; 13. a first bending part; 14. a first straight pipe portion; 15. a second bending part;

20. a return pipe; 21. a return passage; 22. an ejection port; 23. a suction inlet; 24. a baffle plate; 25. a first inclined surface; 26. a second inclined surface;

30. a pressurizing pump;

40. negative pressure suction means;

another: the dashed lines in the figure represent the liquid jet paths.

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.

Example 1

The embodiment 1 provides a medical water jet scalpel head, which has a proximal end and a distal end, wherein the "proximal end" refers to an end of the medical water jet scalpel head that is used for extending into a tissue to be cut, and the "distal end" refers to an end of the medical water jet scalpel head that is used for introducing high-pressure liquid, or an end that is used for being held by medical staff.

Referring to fig. 1, the medical water jet scalpel head provided in this embodiment 1 includes a pressure tube 10 and a return tube 20, the pressure tube 10 is provided with a high pressure passage 11 along its axial direction, and the return tube 20 is provided with a return passage 21 along its axial direction.

In some embodiments, the proximal end of the pressure tube 10 is a closed structure and is provided with an injection hole 12 communicating with the high pressure passage 11, and the distal end of the pressure tube 10 is used to connect a high pressure line so that high pressure liquid can be delivered to the injection hole 12 through the high pressure passage 11 for injection.

In the above embodiments, the high pressure fluid is typically saline or other physiologically compatible fluid, and the fluid is introduced into the high pressure passage 11 of the pressure tube 10 after being formed by the pressurizing pump and the high pressure line, and the jet holes 12 are configured to form a fluid jet when the high pressure fluid is jetted from the jet holes 12, and the fluid jet flow has a high flow rate, so that the tissue can be effectively and safely cut.

In some embodiments, the pressure tube 10 is disposed within the return channel 21, the peripheral wall of the proximal end of the return tube 20 is provided with an ejection orifice 22 and at least one suction orifice 23, the suction orifice 23 is in communication with the return channel 21, the ejection orifice 12 is oriented at an inclination to the ejection orifice 22 such that the liquid jet forms a high pressure jet cutting region outside the return tube 20 disposed between the ejection orifice 22 and the suction orifice 23, and the suction orifice 23 is configured to draw tissue of the high pressure jet cutting region when the return channel 21 is in a negative pressure state.

In other embodiments, the number of suction ports 23 may be one, two, three, four or more, and when the number of suction ports 23 is plural, the plural suction ports 23 should be on the same cross section of the return pipe 20, it should be noted that "cross section" refers to a section perpendicular to the axis of the return pipe 20 to ensure that each suction port 23 is in a negative pressure state.

In the above embodiment, the end of the proximal end of the return tube 20 is a closed structure, the proximal end of the pressure tube 10 is bent inside the proximal end of the return tube 20 to form the first bending portion 13, the first bending portion 13 is used for adjusting the flow direction of the liquid in the pressure tube 10, and the end of the proximal end of the return tube 20 is designed into a conical structure, so that the first bending portion 13 can be attached to the inner surface of the conical structure, so as to increase the attachment area of the pressure tube 10 and the return tube 20 at the proximal end, and the effect of fixing the pressure tube 10 can be achieved, and deformation or falling of the pressure tube 10 under the pressure effect can be effectively avoided; the proximal end of the first bending portion 13 is provided with a first straight tube portion 14 oriented toward the ejection port 22 at an inclination angle, and the ejection hole 12 is opened at the end of the proximal end of the first straight tube portion 14 so that the liquid jet ejected from the ejection hole 12 can be ejected outside the ejection port 22 at a fixed inclination angle, thereby forming a high-pressure jet cutting area outside the return tube 20; therefore, the tissue separating range of the water jet is enlarged to the area outside the tube, so that the maximum action area of the water jet is realized, and the tissue is reasonably and efficiently cut, so that the target tissue is separated, and the aim of effectively cutting the tissue is fulfilled.

In the above embodiment, the outer wall of the pressure tube 10 and the inner wall of the return tube 20 are fixedly attached to form a whole, so that the shape of the pressure tube 10 is prevented from being changed or loosened after collision with tissue, and the injection hole 12 is ensured to be always oriented to the injection hole 22 at an inclination angle.

Alternatively, the tapered configuration of the proximal end of the return tube 20 may be configured as a spatula so as to act as a scalpel, which is capable of cutting the surgical site first to expose the portion requiring aspiration of the jet of liquid for cutting.

In some embodiments, the axial direction of the first straight tube portion 14 intersects with the axial direction of the return tube 20, so that the liquid jet direction of the injection hole 12 and the axial direction of the return tube 20 form an inclination angle θ, where θ satisfies 0 ° < θ < 90 °, such as 1 °, 5 °, 10 °, 30 °, 45 °, 60 °, 75 °, 85 °, and so on, so that the size of the cutting area of the high-pressure jet outside the tube is changed by adjusting the angle of the first straight tube portion 14 to change the injection direction of the liquid jet, so as to change the cutting area of the tissue, so as to satisfy the cutting requirements of different tissues, avoid excessive blood loss of the tissue, and at the same time, not affect the cleaning or clearing effect of the tissue, and more reasonably cut and clear the tissue.

In general, the greater the inclination angle θ, the greater the depth of cut to the tissue; in some preferred embodiments, a higher cutting efficiency and more pronounced cleaning effect can be achieved at an inclination angle θ of 45 °.

In other embodiments, the number of the injection holes 12 may be one or more, and the shape of the injection holes 12 may be circular, square, trapezoid, etc., which is not limited herein, and is specifically designed adaptively according to the actual use situation, but regardless of the design, it should be ensured that the inclination angle formed by the liquid jet direction of the one or more injection holes 12 and the axial direction of the return pipe 20 is equal θ.

It can be seen that, in this embodiment 1, by arranging the injection hole 12 at the proximal end of the pressure tube 10, and the injection hole 12 is oriented to the injection hole 22 at an inclination angle, the high-pressure jet cutting area between the injection hole 22 and the suction hole 23 can be formed outside the return tube 20 by forming the liquid jet when the high-pressure liquid is injected from the injection hole 12, that is, the tissue separating range of the water jet is enlarged to the area outside the tube, so that the maximum action area of the water jet is realized, and further, the tissue is reasonably and efficiently cut, so that the target tissue is separated, and the purpose of effectively cutting the tissue is achieved; when the suction inlet 23 is in a negative pressure state, the cut tissue in the high-pressure jet cutting area can be timely pumped away, so that the cleaning effect of the cut tissue is ensured, and the aim of effectively cleaning the tissue is fulfilled.

Example 2

Embodiment 2 provides a medical water jet scalpel head, which is similar to the medical water jet scalpel head of embodiment 1 above, except that:

referring to fig. 5, the proximal end of the pressure tube 10 is bent to form a second bent portion 15 toward one side of the ejection orifice 22, and the ejection orifice 12 is disposed on the sidewall of the second bent portion 15, i.e., the ejection orifice 12 is transferred from the end of embodiment 1 to the sidewall, so that the ejection orifice 12 can be ensured to face the ejection orifice 22 without providing the first bent portion 13.

In a preferred embodiment, the liquid jet direction of the jet hole 12 is perpendicular to the axial direction of the second fold 15; the axial direction of the second fold 15 forms an inclination angle beta with the axial direction of the return tube 20, and the liquid jet direction of the jet hole 12 forms an inclination angle alpha with the axial direction of the return tube 20, wherein 0 deg. < beta < 90 deg., 0 deg. < alpha < 90 deg., for example beta and/or alpha may be 1 deg., 5 deg., 10 deg., 30 deg., 45 deg., 60 deg., 75 deg., 85 deg., etc., but beta, alpha need to satisfy beta + alpha = 90 deg., so that the jet hole 12 can jet out of the jet outlet 22 at a fixed inclination angle, thereby forming a high pressure jet cutting area outside the return tube 20.

In some embodiments, the proximal end of the return tube 20 is provided with a hemispherical structure, the outer peripheral wall of the second fold 15 being free from contact with the inner wall of the return tube 20.

In some embodiments, the medical water jet scalpel head further comprises a baffle plate 24, the baffle plate 24 is arranged in the reflux passage 21, the baffle plate 24 is arranged between the ejection outlet 22 and the suction inlet 23, as shown in fig. 5, the baffle plate 24 is arranged at the turning position of the second bending part 15, so that the communication between the ejection outlet 22 and the reflux passage 21 can be blocked, the pressure tube 10 can be fixed, and deformation or loosening of the pressure tube 10 after collision with tissues can be avoided.

In addition, when the return passage 21 is in a negative pressure state, the cut tissue of the high-pressure jet cutting area can be pumped away only through the suction port 23, so that a better and faster cleaning effect can be achieved, and the cut tissue is effectively prevented from entering the return passage 21 from the ejection port 22 to affect the cleaning effect.

Example 3

Embodiment 3 is similar to the medical water jet scalpel head of embodiment 2 above, in that:

referring to fig. 2-4, the side wall of the proximal end of the return tube 20 forms a first inclined plane 25 with an inclination angle β, the first inclined plane 25 is opposite to the ejection orifice 22, and the outer peripheral wall of the second bending portion 15 is attached to the first inclined plane 25, i.e. the outer peripheral wall of the second bending portion 15 contacts with the inner wall of the return tube 20 to form a whole, so that the connection strength between the second bending portion 15 and the return tube 20 can be enhanced, the structural strength of the medical water jet scalpel head can be effectively improved, and the shape of the second bending portion 15 is prevented from being changed after collision with tissues.

In the above embodiment, the first inclined surface 25 makes the proximal end of the return tube 20 have a tapered structure, which can reduce the resistance of the cutter head moving in the tissue and improve the operation flexibility.

Example 4

Embodiment 4 is similar to the medical water jet scalpel head provided in embodiment 1 above, in that:

as shown in fig. 6, the proximal end of the pressure tube 10 is parallel to the proximal end of the return tube 20, the injection hole 12 is obliquely arranged on the side wall of the pressure tube 10, the liquid jet direction of the injection hole 12 faces the injection hole 22, and the liquid jet direction of the injection hole 12 forms an inclination angle gamma with the axial direction of the pressure tube 10, wherein gamma satisfies 0 ° < gamma < 90 °, for example, the inclination angle gamma can be 1 °, 5 °, 10 °, 30 °, 45 °, 60 °, 75 °, 85 ° and the like, namely, the injection hole 12 is directly arranged in an oblique manner so as to avoid the bending design of the pressure tube 10, and the processing difficulty and the design cost of the medical water jet cutter head can be reduced under the condition that the function of the injection hole is unchanged.

In this embodiment, the inclination angle γ is preferably 45 °.

In this embodiment, the proximal end of the return tube 20 is provided with a hemispherical configuration.

Example 5

Embodiment 5 is similar to the medical water jet scalpel head of embodiment 4 above, in that:

referring to fig. 7, the end of the proximal end of the return tube 20 forms a second inclined plane 26 with an inclination angle γ, and the second inclined plane 26 is parallel to the liquid jet direction of the jet hole 12, so that the proximal end of the return tube 20 has a tapered structure, which can reduce the resistance of the tool bit moving in the tissue, and after the second inclined plane 26 is provided, the proximal end of the pressure tube 10 can abut against the second inclined plane 26, thereby further fixing the pressure tube 10.

Example 6

As shown in fig. 8, embodiment 6 provides a liposuction apparatus, which includes the medical water jet scalpel head of any one of embodiments 1 to 5, and further includes a pressurizing pump 30 and a negative pressure suction device 40; wherein, the booster pump 30 is communicated with distal end of the pressure tube 10, is used for delivering the pressurized liquid to the high-pressure channel 11; the negative pressure suction device 40 is provided at the distal end of the return tube 20 and communicates with the return passage 21 for controlling the negative pressure value of the suction port 23 for suction of the tissue.

In the above embodiment, the negative pressure of the suction port 23 to the tissue is between 0.01 Mpa and 0.20Mpa under the action of the negative pressure suction device 40, so as to meet the negative pressure requirements of different tissues.

In embodiment 6, the pressurizing pump 30 is used to pressurize the liquid and then the liquid is introduced into the high-pressure passage 11, the jet hole 12 is used to jet the liquid to form a jet flow so as to realize the cutting and separation of the target tissue in the external region of the tube, while the negative pressure suction device 40 can suck the tissue in the high-pressure jet flow cutting region through the suction port 23, so that a better postoperative rehabilitation effect can be obtained

In summary, according to the medical water jet scalpel head provided by the embodiment of the invention, the jet hole 12 is arranged at the proximal end of the pressure pipe 10, and the jet hole 12 faces the jet hole 22 at an inclination angle, so that a high-pressure jet cutting area arranged between the jet hole 22 and the suction inlet 23 can be formed at the outer side of the return pipe 20 by forming a liquid jet when high-pressure liquid is jetted from the jet hole 12, namely, the water jet separation tissue range is enlarged to the outer pipe area, thereby realizing the maximum action area of the water jet, further realizing reasonable and efficient cutting of tissues, facilitating separation of target tissues, achieving the aim of effectively cutting tissues, and in addition, the cut tissues in the high-pressure jet cutting area can be timely pumped away when the suction inlet 23 is in a negative pressure state, thereby ensuring the cleaning effect of the cut tissues and achieving the aim of effectively cleaning the tissues.

According to the liposuction device provided by the embodiment of the invention, the pressurizing pump 30 is utilized to pressurize the liquid and then the liquid is introduced into the high-pressure passage 11, the jet hole 12 is used for jetting out the liquid jet so as to realize cutting and separating of the target tissue in the external region of the tube, and the negative pressure suction device 40 can pump away the tissue in the high-pressure jet cutting region through the suction inlet 23, so that a better postoperative rehabilitation effect can be obtained.

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 proximal end and a distal end, comprising:

a pressure tube having a high pressure passage along an axial direction thereof, a proximal end of the pressure tube being formed with an injection hole communicating with the high pressure passage, a distal end of the pressure tube being for passing high pressure liquid into the high pressure passage, the injection hole being configured to form a liquid jet when the high pressure liquid is injected from the injection hole; and

the return pipe is axially provided with a return passage, the pressure pipe is arranged in the return passage, the peripheral wall of the proximal end of the return pipe is provided with an ejection port and at least one suction port, the suction port is communicated with the return passage, the ejection port faces the ejection port at an inclination angle, so that a liquid jet forms a high-pressure jet cutting area arranged between the ejection port and the suction port outside the return pipe, and the suction port is configured to pump away tissue of the high-pressure jet cutting area when the return passage is in a negative pressure state.

2. The medical water jet scalpel head according to claim 1, wherein the proximal end of the pressure tube is bent inside the proximal end of the return tube to form a first bent portion, the proximal end of the first bent portion is provided with a first straight tube portion oriented toward the ejection port at an inclination angle, and the ejection port is opened at an end portion of the proximal end of the first straight tube portion.

3. A medical water jet scalpel head as claimed in claim 2, wherein the axial direction of the first straight tube portion intersects the axial direction of the return tube such that the liquid jet direction of the jet orifice forms an inclination angle θ with the axial direction of the return tube;

wherein θ satisfies 0 ° < θ < 90 °.

4. The medical water jet scalpel head according to claim 1, wherein the proximal end of the pressure tube is bent towards one side of the ejection port to form a second bent portion, the ejection port is formed in the side wall of the second bent portion, the ejection port faces the ejection port, and the liquid jet direction of the ejection port is perpendicular to the axial direction of the second bent portion.

5. The medical water jet scalpel head as claimed in claim 4, wherein an axial direction of the second bending portion forms an inclination angle β with an axial direction of the return pipe, and a liquid jet direction of the jet hole forms an inclination angle α with the axial direction of the return pipe;

wherein β, α satisfy β+α=90°.

6. The medical water jet scalpel head of claim 5, wherein a side wall of the proximal end of the return tube forms a first inclined surface with an inclination angle beta, the first inclined surface is opposite to the ejection port, and the outer wall of the second bending portion is attached to the first inclined surface.

7. The medical water jet scalpel head according to claim 1, wherein the proximal end of the pressure tube is parallel to the proximal end of the return tube, the jet orifice is obliquely arranged on the side wall of the pressure tube, the liquid jet direction of the jet orifice is toward the jet orifice, and the liquid jet direction of the jet orifice forms an inclination angle gamma with the axial direction of the pressure tube;

wherein, gamma satisfies 0 DEG < gamma < 90 deg.

8. A medical water jet cutter head according to claim 7, wherein the proximal end of the return tube is formed with a second bevel having an inclination γ, said second bevel being parallel to the liquid jet direction of the jet orifice.

9. The medical water jet scalpel head of claim 1, further comprising:

and the baffle plate is arranged in the backflow passage, is arranged between the ejection opening and the suction opening and is used for blocking the communication between the ejection opening and the backflow passage.

10. A liposuction device comprising the medical water jet scalpel head according to any one of claims 1 to 9, further comprising:

a pressurizing pump, which is communicated with the distal end of the pressure pipe and is used for pressurizing the liquid and then conveying the liquid to the high-pressure passage; and

and the negative pressure suction device is arranged at the distal end of the return pipe and is communicated with the return passage and used for controlling the negative pressure value of the suction port to suck the tissue.