CN114569197A

CN114569197A - Liquid jet device for cutting off tissue

Info

Publication number: CN114569197A
Application number: CN202210274250.9A
Authority: CN
Inventors: 孙光宇; 吴衍
Original assignee: Huizhou Hydro Caresys Medical Co ltd
Current assignee: Huizhou Hydro Caresys Medical Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-06-03

Abstract

The invention discloses a liquid injection device for cutting tissues, which comprises a pressure pipe, a return pipe and a sleeve, wherein a first end of the pressure pipe is provided with an injection hole, a second end of the pressure pipe is used for introducing high-pressure liquid, and the injection hole is configured to form liquid jet when the high-pressure liquid is injected from the injection hole; the backflow pipe is sleeved on the pressure pipe, and the first end of the pressure pipe extends out of the first end of the backflow pipe; the jet hole is opposite to the opening of the first end of the return pipe, and the opening of the first end of the return pipe is configured to receive the liquid jet; the jet hole is opposite to the opening of the first end of the return pipe at interval to form a cutting opening; the sleeve is sleeved on the first end of the return pipe and can slide along the axial direction of the return pipe so that the first end of the sleeve protrudes out of the first end of the return pipe to cover at least one part of the cutting opening. The size of the cutting opening is changed through the sliding of the sleeve, the cutting area is changed to form different cutting forces, and the cutting requirements of different tissues are met.

Description

Liquid jet device for cutting off tissue

Technical Field

The invention relates to the technical field of medical instruments, in particular to a liquid jet device for cutting tissues.

Background

Currently, surgical removal of tissue typically requires the operator to manually remove the severed tissue using forceps, or requires an external vacuum source (e.g., via a vent tube) to be applied to the surgical site in order to remove the severed tissue. However, the above-mentioned tissue removal by forceps or an external vacuum source (e.g., via a vent tube) and tissue resection are performed independently, and it is difficult to completely remove the excised tissue from the surgical site, which poses a risk of post-operative contamination.

In the prior art, instruments that use partly liquid jets are used for cutting or ablating tissue, which has the advantage of avoiding thermal damage to the surrounding tissue (for example caused by laser devices or electrosurgical instruments), while the tissue is removed along the liquid flow after it has been cut, which does not require additional suction, is simple and efficient to operate, and ensures the integrity of the tissue removal. For example, CN101394877B discloses a surgical liquid jet instrument with a selectively controllable distal end shape, in which pressurized liquid is passed through a pressure tube to form a liquid jet from a nozzle, the tissue is cut by the suction force of the high-speed liquid jet, and the cut tissue is discharged after flowing into a suction tube with the liquid. However, the suction force is constant because the suction portion of the surgical instrument for liquid jet is fixed and invariable, and there is a risk that the cleaning or removal effect of the liquid jet is affected and the tissue is not completely removed because the cutting force of different tissues at the surgical portion varies, and if the suction force is changed by adjusting the pressure of the pressurized liquid.

Disclosure of Invention

The invention aims to provide a liquid jet device for cutting tissues, which can change the suction force of a suction part to meet the cutting requirements of different tissues and can reasonably remove or clear the tissues under the condition of ensuring that the pressure and the flow rate of liquid jet flow are not changed, so as to achieve the aim of effectively cutting and removing the tissues.

In order to achieve the above object, a first aspect of the present invention provides a liquid ejection apparatus for cutting a tissue, comprising:

a pressure tube, a first end of the pressure tube being formed with an injection hole, a second end of the pressure tube being for letting in high pressure liquid, the injection hole being configured to form a liquid jet when the high pressure liquid is ejected from the injection hole;

the backflow pipe is sleeved on the pressure pipe, and the first end of the pressure pipe extends out of the first end of the backflow pipe; the jet hole is opposite to the opening of the first end of the return pipe, and the opening of the first end of the return pipe is configured to receive the liquid jet; the jet hole is opposite to and spaced from the opening of the first end of the return pipe to form a cutting opening; and

the sleeve is sleeved on the first end of the return pipe and can slide along the axial direction of the return pipe, so that the first end of the sleeve protrudes out of the first end of the return pipe to cover at least one part of the cutting opening.

In some embodiments, the injection holes are spaced from the opening of the first end of the sleeve by a distance of 0-200 mm.

In some embodiments, the injection hole opens at an end of the first end of the pressure pipe, which is bent such that the end of the first end of the pressure pipe faces the opening of the first end of the return pipe.

In some embodiments, the end of the first end of the pressure tube is provided with a depth of cut plateau extending axially outwardly of the return tube.

In some embodiments, the return tube is bent upward at a position close to the second end of the casing to form a bent portion, and the included angle between the bent portion and the horizontal plane ranges from 0 ° to 90 °.

In some embodiments, the first end of the return pipe is connected to the first end of the pressure pipe by a fixing member, and the fixing member is wrapped on the outer side wall of the first end of the pressure pipe.

In some embodiments, the fixing member is provided with a vent hole.

Further, in order to achieve the above object, a second aspect of the present invention provides a liquid ejection apparatus for excising tissue, comprising:

the sleeve is sleeved on the first end of the return pipe, at least one first through hole is formed in the side wall of the sleeve, at least one second through hole is formed in the side wall of the return pipe, and the sleeve can rotate along the axis of the return pipe so that the at least one first through hole is communicated with the at least one second through hole.

In some embodiments, the return tube is bent upward at a position close to the second end of the sleeve to form a bent portion, and the included angle between the bent portion and the horizontal plane is in the range of 0-90 °.

Compared with the prior art, the liquid jet device for cutting the tissue has the advantages that:

the first end of pressure pipe stretches out outside the first end of back flow, so that the opening of the first end of jet orifice on the pressure pipe and back flow is the opposition in opposite directions, high-pressure liquid forms fast-speed liquid efflux when spouting from the jet orifice, this liquid efflux is formed with the suction that is the negative pressure in the position of cutting opening, can aspirate the tissue in order to form the cutting force, cut the tissue, the tissue after the cutting flows in the opening of the first end of back flow along the liquid efflux that has kinetic energy, then discharge along the back flow, thereby the realization is to the tissue after the cutting effect of cleaing away, fast-speed liquid efflux cleans surgical site simultaneously, in order to improve the integrality of cleaing away of the tissue after the cutting. The outside cover at the first end of back flow is equipped with the sleeve pipe, the sleeve pipe can slide in order to change the size of cutting opening along the axial of back flow, the change is to the cutting area of tissue with the negative pressure value of adjustment suction (or the sleeve pipe rotates so that first through-hole and second through-hole communicate along the axis of back flow, the negative pressure value of cutting opening), thereby form the cutting demand of different cutting power in order to satisfy different tissues, it is too much to avoid tissue blood loss, do not influence the washing or the effect of cleaing away to the tissue simultaneously, cut and clear away the tissue more rationally.

Drawings

FIG. 1 is a schematic view of a structure of a liquid ejecting apparatus according to embodiment 1 of the present invention;

FIG. 2 is another schematic structural view of a liquid ejecting apparatus according to embodiment 1 of the present invention, in which a return pipe is provided with a bent portion;

FIG. 3 is a view showing a state of use of a liquid ejecting apparatus according to embodiment 1 of the invention;

FIG. 4 is a schematic view showing a structure of a liquid ejecting apparatus according to embodiment 2 of the present invention, in which a return pipe is provided with a bending portion;

in the figure, 1, a pressure pipe; 11. an injection hole; 12. a cutting depth platform; 2. a return pipe; 21. A bending part; 22. a second through hole; 3. a sleeve; 31. a first through hole; 4. a fixing member; 41. A vent hole; 42. a third through hole; 10. cutting the opening; 20. a high pressure liquid; 30. and (4) organizing.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

Referring to fig. 1 to 3, an embodiment 1 of the present invention provides a fluid injection apparatus for cutting tissue, including a pressure tube 1, a return tube 2 and a sleeve 3; the pressure pipe 1 is hollow, the first end of the pressure pipe is closed, the second end of the pressure pipe is used for connecting a high-pressure pipeline, the return pipe 2 and the sleeve 3 are hollow and provided with openings at two ends. Wherein, the first end of the pressure pipe 1 is formed with an injection hole 11, the second end of the pressure pipe 1 is used for introducing a high-pressure liquid 20, the high-pressure liquid 20 is, for example, a physiological saline or other physiologically compatible liquid, which is introduced into the pressure pipe 1 after forming the high-pressure liquid 20 under the action of a pressurizing pump and a hose, the injection hole 11 is configured to form a liquid jet when the high-pressure liquid 20 is ejected from the injection hole 11, the liquid jet has a high flow rate and a negative pressure capable of forming a suction tissue. The return pipe 2 is sleeved on the pressure pipe 1, and the first end of the pressure pipe 1 extends out of the first end of the return pipe 2; the jet hole 11 is opposite to the opening of the first end of the return pipe 2, the opening of the first end of the return pipe 2 is configured to receive the liquid jet, and the high-speed liquid jet flows into the opening of the first end of the return pipe 2 after sucking and cutting the tissue 30 and is driven by the residual kinetic energy and then is discharged along the return pipe 2; the jet hole 11 is spaced apart from the opening of the first end of the return tube 2 so as to form a cutting opening 10, and the high-speed liquid jet flows through the cutting opening 10 and contacts the tissue 30 at the surgical site to suck and cut the superficial tissue 30, and the cut tissue 30 flows into the opening of the first end of the return tube 2 together with the liquid jet to remove the cut tissue 30. The sleeve 3 is slidably sleeved on the first end of the return pipe 2, the sleeve 3 is driven to slide by external force so that the first end of the sleeve 3 protrudes out of the first end of the return pipe 2, the part of the sleeve 3 extending out of the return pipe 2 covers the cutting opening 10, the size of the cutting opening 10 is changed to adjust the contact area between the liquid jet and the tissue 30, and therefore the negative pressure value of the liquid jet on the tissue 30 is adjusted.

It should be noted that the number of the injection holes 11 in embodiment 1 of the present invention may be one or more, and the shape of the injection hole 11 may be circular, square, trapezoid, or the like, and is not limited herein, and is adaptively designed according to the actual use situation.

Based on above-mentioned technical scheme, change the size of cutting opening 10 through sleeve pipe 3 to the negative pressure value of cutting area in order to adjust the suction force to the tissue changes, thereby forms the cutting demand of different cutting force in order to satisfy different tissues, avoids tissue blood loss too much, does not influence the washing or the effect of cleaing away to the tissue simultaneously, cuts and clears away the tissue more rationally.

In some embodiments, referring to fig. 1-2, the tissue-to-fluid jet negative pressure value is between 0-0.1 Mpa, and thus the negative pressure requirements of different tissues can be satisfied by driving the sleeve 3 to slide on the return tube 2 such that the distance L between the injection hole 11 and the opening of the first end of the sleeve 3 is controlled to be 0-200 mm, e.g. 1mm, 10mm, 20mm, 50mm, 80mm, 200mm, etc.

In some embodiments, in order to face the injection hole 11 to the opening of the first end of the return pipe 2, the injection hole 11 of embodiment 1 of the present invention is opened at the end of the first end of the pressure pipe 1, and the first end of the pressure pipe 1 is bent so that the end of the first end of the pressure pipe 1 faces the opening of the first end of the return pipe 2. The injection hole 11 communicates with the interior of the pressure pipe 1 so that the high-pressure liquid 20 is ejected from the injection hole 11 after flowing from the second end of the pressure pipe 1 to the first end of the pressure pipe 1, forms a liquid jet and flows toward the opening of the first end of the return pipe 2.

In some embodiments, referring to fig. 1 and 3, the end of the first end of the pressure pipe 1 is provided with a cutting depth platform 12 extending axially outwards along the return pipe 2. Wherein, cutting depth platform 12 can with the tip fixed connection of the first end of pressure pipe 1, this cutting depth platform 12 is used for restricting the diffusion scope of the liquid efflux of following jet orifice 11 spun to the degree of depth between control liquid efflux and the cutting opening 10, and then the cutting depth of adjustment liquid efflux to tissue 30 prevents to destroy good deep tissue.

In some embodiments, referring to fig. 2, the return tube 2 is bent upward at a position close to the second end of the sleeve 3 to form a bent portion 21, and an included angle α between the bent portion 21 and a horizontal plane is 0-90 °, for example, 1 °, 5 °, 10 °, 45 °, 60 °, 75 °, and the like. The angle of the return pipe 2 is adjusted to change the return direction of the liquid jet, so that the flow speed of the liquid jet is changed, the negative pressure value of the liquid jet at the cutting opening 10 is changed, and different suction cutting forces are formed to meet the cutting requirements of different tissues. Generally, the larger the angle α, the slower the liquid jet flow rate, and the lower the suction cutting force created, thus avoiding the risk of tissue trauma due to excessive suction cutting force.

In some embodiments, in order to fix the injection hole 11 opposite to the opening of the first end of the return tube 2, the liquid injection apparatus according to embodiment 1 of the present invention further includes a fixing member 4, the fixing member 4 is hollow, the shape of the fixing member 4 is adapted to the shape of the pressure tube 1, the fixing member 4 is wrapped on the outer sidewall of the first end of the pressure tube 1, and one end of the fixing member 4 is connected to the end portion of the first end of the return tube 2, so that the return tube 2, the pressure tube 1 and the fixing member 4 are fixed to form a whole, and the shape of the pressure tube 1 is prevented from changing after colliding with tissue, so as to ensure that the injection hole 11 is opposite to the opening of the first end of the return tube 2. For example, the fixing member 4 may be a spatula structure capable of cutting the surgical site first to expose the portion requiring the suction cutting by the liquid jet.

In some embodiments, the fixing member 4 is opened with a vent hole 41. Because the high-speed liquid jet forms a negative pressure vacuum environment in the fixing part 4, in order to ensure that the fixing part 4, the pressure pipe 1 and the return pipe 2 are not flattened and deformed by the external atmospheric pressure, the fixing part 4 is provided with a vent hole 41 communicated with the inside of the fixing part, the vent hole 41 is used for communicating the inside of the fixing part 4 with the outside, and the external air enters the inside of the fixing part 4 through the vent hole 41 under the action of the atmospheric pressure difference so as to prevent the fixing part 4, the pressure pipe 1 and the return pipe 2 from being deformed by pressure.

In some embodiments, in order to prevent the fixing element 4 from being separated from the pressure tube 1, the fixing element 4 is adhered to the outer sidewall of the first end of the pressure tube 1, so that the fixing element 4 and the pressure tube 1 form a whole, thereby effectively protecting the pressure tube 1 and improving the structural strength of the whole.

In some embodiments, in order to prevent the pressure tube 1 from moving in position in the return tube 2 during the operation of the liquid injection device, the outer sidewall of the second end of the pressure tube 1 in embodiment 1 of the present invention is adhered to the inner sidewall of the return tube 2, so that the pressure tube 1 and the return tube 2 are integrated to ensure the normal operation of the liquid injection device.

In some embodiments, the liquid spraying device of the present invention further comprises a handle portion (not shown) far away from the first end of the return tube 2, and the operator can hold the handle portion to drive the return tube 2 and the first end of the pressure tube 1 to move to the tissue position for surgical operation, so that the liquid spraying device can smoothly perform suction cutting on the tissue.

To sum up, embodiment 1 of the present invention provides a fluid injection apparatus for cutting tissue, wherein a first end of a pressure tube 1 extends out of a first end of a return tube 2, so that an injection hole 11 of the pressure tube 1 is opposite to an opening of the first end of the return tube 2, a high-speed fluid jet is formed when a high-pressure fluid 20 is injected from the injection hole 11, a suction force having a negative pressure is formed at a position of a cutting opening 10, the fluid jet can suck a tissue 30 to form a cutting force, the tissue 30 is cut, the cut tissue 30 flows into the opening of the first end of the return tube 2 along the fluid jet having kinetic energy and then is discharged along the return tube 2, thereby achieving an effect of removing the cut tissue 30, and the high-speed fluid jet cleans a surgical site to improve the integrity of the removed cut tissue. The outside cover at the first end of back flow pipe 2 is equipped with sleeve pipe 3, and sleeve pipe 3 can slide in order to change the size of cutting opening 10 along the axial of back flow pipe 2, changes the negative pressure value to the cutting area of tissue 30 with the adjustment suction to form the cutting demand of different cutting forces in order to satisfy different tissues, avoid tissue blood loss too much, do not influence the washing or the effect of cleaing away to the tissue simultaneously, cut and clear away the tissue more rationally.

Example 2

Referring to fig. 4, an embodiment 2 of the present invention provides a liquid ejecting apparatus for cutting a tissue, which is similar to the liquid ejecting apparatus of the above embodiment 1, except that: the side wall of the sleeve 3 is provided with at least one first through hole 31, the side wall of the return pipe 2 is provided with at least one second through hole 22, and the sleeve 3 can also rotate along the axis of the return pipe 2 so as to enable the at least one first through hole 31 and the at least one second through hole 22 to be communicated with each other. So through rotating sleeve 3 so that the first through-hole 31 of a plurality of and a plurality of second through-hole 22 intercommunication, the outside gas loops through first through-hole 31, second through-hole 22 gets into inside the back flow 2, the gas flow speed in the back flow 2 has been changed, thereby adjust the negative pressure value of cutting edge 10 under the cutting area condition that does not change cutting edge 10, the realization is adjusted the negative pressure value of cutting edge 10, thereby further satisfy the cutting demand of different tissues, the improvement is to the washing of tissue or clears away the effect.

Further, when the liquid ejecting apparatus according to embodiment 2 of the present invention includes the fixing member 4, the side wall of the fixing member 4 is provided with at least one third through hole 42, the first through hole 31, the third through hole 42 and the second through hole 22 are sequentially communicated by rotating the sleeve 3, and external air sequentially passes through the first through hole 31, the third through hole 42 and the second through hole 22 and enters the inside of the return pipe 2, so that the flow speed of air in the return pipe 2 is changed, the adjustment of the negative pressure value of the cutting opening 10 is realized, and the cutting requirements of different tissues are met.

In addition, please refer to the liquid ejecting apparatus of embodiment 1 for other structures of the liquid ejecting apparatus of embodiment 2, and detailed description thereof is omitted here.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A liquid jet apparatus for ablating tissue, comprising:

the return pipe is sleeved on the pressure pipe, and the first end of the pressure pipe extends out of the first end of the return pipe; the injection hole is opposite to the opening of the first end of the return pipe, and the opening of the first end of the return pipe is configured to receive the liquid jet; the jet hole is opposite to and spaced from the opening of the first end of the return pipe to form a cutting opening; and

2. The fluid jet apparatus for cutting tissue as defined in claim 1, wherein said jet orifice is spaced from the opening of said first end of said cannula by a distance of 0-200 mm.

3. The fluid ejection device for cutting tissue as claimed in claim 1, wherein the ejection hole is opened at an end portion of the first end of the pressure tube, the first end of the pressure tube being bent such that the end portion of the first end of the pressure tube is opened toward the first end of the return tube.

4. A fluid ejection device for use in ablating tissue as in claim 3, wherein the end of the first end of the pressure tube is provided with a depth of cut plateau extending axially outwardly of the return tube.

5. The fluid ejection device for cutting tissue as claimed in claim 1, wherein the return tube is bent upward at a position near the second end of the sleeve to form a bent portion, and the bent portion has an angle ranging from 0 ° to 90 ° with respect to a horizontal plane.

6. The fluid ejection device for cutting tissue as in any one of claims 1 to 5, further comprising a fixing member wrapped around an outer sidewall of the first end of the pressure tube, one end of the fixing member being connected to the first end portion of the return tube.

7. The fluid ejection device for cutting tissue as recited in claim 6, wherein the fastener member is provided with a vent hole.

8. A liquid jet apparatus for ablating tissue, comprising:

9. The fluid ejection device for cutting tissue as claimed in claim 8, wherein the return tube is bent upward at a position near the second end of the sleeve to form a bent portion, and the bent portion has an angle ranging from 0 ° to 90 ° with respect to a horizontal plane.

10. The fluid jet apparatus for cutting tissue as claimed in claim 8 or 9, further comprising a fixing member wrapped around an outer sidewall of the first end of the pressure tube, one end of the fixing member being connected to the first end portion of the return tube.