Liquid injection device for removing tissue

Abstract

The present invention discloses a liquid injection device for tissue excision, comprising a pressure tube, a return tube, and a sleeve. The first end of the pressure tube is formed with a spray hole, the second end of the pressure tube is used to pass high-pressure liquid, and the spray hole is configured to form a liquid jet when the high-pressure liquid is ejected from the spray hole; the return tube is sleeved on the pressure tube, and the first end of the pressure tube extends outside the first end of the return tube; the spray hole and the opening of the first end of the return tube are opposite to each other, and the opening of the first end of the return tube is configured to receive the liquid jet; the spray hole and the opening of the first end of the return tube are relatively spaced to form a cutting opening; the sleeve is sleeved on the first end of the return tube, and the sleeve can slide along the axial direction of the return tube so that the first end of the sleeve protrudes outside the first end of the return tube to cover at least a portion of the cutting opening. The sliding of the sleeve can change the size of the cutting opening, change the cutting area, and form different cutting forces to meet the cutting requirements of different tissues.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a liquid jetting device for removing tissue. Background Art

[0002] Currently, surgical tissue removal generally requires the operator to manually remove the excised tissue using forceps, or to apply an external vacuum source (e.g., via a ventilation tube) to the surgical site to remove the excised tissue. However, the removal of tissue using forceps or an external vacuum source (e.g., via a ventilation tube) is performed independently of the tissue removal process, making it difficult to completely remove the excised tissue from the surgical site, and posing a risk of postoperative contamination.

[0003] In the prior art, some instruments using liquid jets are used to cut or ablate tissue. This has the advantage of avoiding thermal damage to surrounding tissue (such as caused by laser equipment or electrosurgical instruments). At the same time, after the tissue is cut, it is discharged along the liquid flow. This process does not require additional suction, is simple to operate and highly efficient, and ensures the integrity of tissue removal. For example, patent publication number CN101394877B discloses a liquid jet surgical instrument with selectively controllable distal shape. Pressurized liquid is formed into a liquid jet from a nozzle through a pressure tube. The high-speed liquid jet suction force is used to cut tissue. The cut tissue flows into the suction tube and is then discharged. However, the suction site of the above-mentioned liquid jet surgical instrument is fixed and cannot be changed, resulting in a fixed suction force. Since the cutting force of different tissues at the surgical site varies, if the suction force is changed by adjusting the pressure of the pressurized liquid, it will easily affect the cleaning or removal effect of the liquid jet, and there is a risk of incomplete tissue removal. Summary of the Invention

[0004] The object of the present invention is to provide a liquid injection device for removing tissue, which can change the suction force of the suction part to meet the cutting requirements of different tissues while ensuring that the pressure and flow rate of the liquid jet remain unchanged, and at the same time can reasonably clear or remove tissue to achieve the purpose of effective cutting and removal of tissue.

[0005] In order to achieve the above-mentioned object, the present invention provides a liquid injection device for removing tissue in a first aspect, comprising:

[0006] a pressure tube, wherein a spray hole is formed at a first end of the pressure tube, and a second end of the pressure tube is used to pass high-pressure liquid, and the spray hole is configured to form a liquid jet when the high-pressure liquid is ejected from the spray hole;

[0007] a return pipe, the return pipe being sleeved on the pressure pipe, the first end of the pressure pipe extending out of the first end of the return pipe; the injection hole being opposite to the opening of the first end of the return pipe, the opening of the first end of the return pipe being configured to receive the liquid jet; the injection hole being spaced relative to the opening of the first end of the return pipe to form a cutout; and

[0008] A sleeve is sleeved on the first end of the return pipe, and the sleeve can slide along the axial direction of the return pipe so that the first end of the sleeve protrudes outside the first end of the return pipe to cover at least a portion of the cutting port.

[0009] In some embodiments, the distance between the injection hole and the opening of the first end of the sleeve is 0-200 mm.

[0010] In some embodiments, the injection hole is opened at the end of the first end of the pressure tube, and the first end of the pressure tube is bent so that the end of the first end of the pressure tube faces the opening of the first end of the return tube.

[0011] In some embodiments, a cutting depth platform extending axially outwardly from the return pipe is provided at the end portion of the first end of the pressure pipe.

[0012] In some embodiments, the return pipe is bent upward at a position close to the second end of the sleeve to form a bent portion, and the angle between the bent portion and the horizontal plane is in the range of 0-90°.

[0013] In some embodiments, a fixing member is further included, wherein the fixing member is wrapped around the outer side wall of the first end of the pressure tube, and one end of the fixing member is connected to the first end of the return tube.

[0014] In some embodiments, the fixing member is provided with a ventilation hole.

[0015] In addition, in order to achieve the above-mentioned object, the second aspect of the present invention provides a liquid injection device for removing tissue, comprising:

[0016] a pressure tube, wherein a spray hole is formed at a first end of the pressure tube, and a second end of the pressure tube is used to pass high-pressure liquid, and the spray hole is configured to form a liquid jet when the high-pressure liquid is ejected from the spray hole;

[0017] a return pipe, the return pipe being sleeved on the pressure pipe, the first end of the pressure pipe extending out of the first end of the return pipe; the injection hole being opposite to the opening of the first end of the return pipe, the opening of the first end of the return pipe being configured to receive the liquid jet; the injection hole being spaced relative to the opening of the first end of the return pipe to form a cutout; and

[0018] A sleeve, wherein the sleeve is sleeved on the first end of the return pipe, the side wall of the sleeve is provided with at least one first through hole, the side wall of the return pipe is provided with at least one second through hole, and the sleeve can be rotated along the axis of the return pipe so that at least one first through hole and at least one second through hole are interconnected.

[0019] In some embodiments, the return pipe is bent upward at a position close to the second end of the sleeve to form a bent portion, and the angle between the bent portion and the horizontal plane is in the range of 0-90°.

[0020] In some embodiments, a fixing member is further included, wherein the fixing member is wrapped around the outer side wall of the first end of the pressure tube, and one end of the fixing member is connected to the first end of the return tube.

[0021] Compared with the prior art, the liquid injection device for tissue excision of the present invention has the following advantages:

[0022] The first end of the pressure tube extends out of the first end of the return tube so that the injection hole on the pressure tube is opposite to the opening of the first end of the return tube. When the high-pressure liquid is ejected from the injection hole, a high-speed liquid jet is formed. The liquid jet forms a suction force with negative pressure at the position of the cutting port, which can suck the tissue to form a cutting force and cut the tissue. The cut tissue flows into the opening of the first end of the return tube along the liquid jet with kinetic energy, and then is discharged along the return tube, thereby achieving the effect of clearing the cut tissue. At the same time, the high-speed liquid jet cleans the surgical site to improve the cleaning integrity of the cut tissue. A sleeve is provided on the outside of the first end of the return tube, and the sleeve can slide along the axial direction of the return tube to change the size of the cutting port, change the cutting area of ​​the tissue to adjust the negative pressure value of the suction force (or the sleeve rotates along the axis of the return tube to connect the first through hole with the second through hole, changing the negative pressure value of the cutting port), thereby forming different cutting forces to meet the cutting requirements of different tissues, avoiding excessive bleeding of the tissue, and at the same time not affecting the cleaning or removal effect of the tissue, and more reasonably cutting and removing the tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a schematic structural diagram of a liquid ejecting device according to embodiment 1 of the present invention;

[0024] Figure 2 1 is another structural schematic diagram of the liquid injection device according to embodiment 1 of the present invention, in which the return pipe is provided with a bent portion;

[0025] Figure 3 1 is a diagram showing a liquid ejecting device in use according to embodiment 1 of the present invention;

[0026] Figure 4 1 is a structural diagram of a liquid injection device according to embodiment 2 of the present invention, in which a return pipe is provided with a bent portion;

[0027] In the figure, 1, pressure tube; 11, injection hole; 12, cutting depth platform; 2, return pipe; 21, bending part; 22, second through hole; 3, sleeve; 31, first through hole; 4, fixing piece; 41, vent hole; 42, third through hole; 10, cutting port; 20, high-pressure liquid; 30, tissue. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] Example 1

[0034] Please refer to Figure 1 -3. Embodiment 1 of the present invention provides a liquid injection device for tissue removal, comprising a pressure tube 1, a return tube 2, and a cannula 3. The pressure tube 1 is hollow, with a closed first end and a second end for connection to a high-pressure pipeline. The return tube 2 and cannula 3 are each hollow and open at both ends. The pressure tube 1 has a spray hole 11 formed at the first end, and a second end for admitting a high-pressure liquid 20. The high-pressure liquid 20, such as saline or other physiologically compatible liquid, is formed into the high-pressure liquid 20 by a pressure pump and a flexible tube and then introduced into the pressure tube 1. The spray hole 11 is configured such that when the high-pressure liquid 20 is ejected from the spray hole 11, a liquid jet is formed. This liquid jet has a high flow rate and generates a negative pressure capable of aspirating tissue. The return tube 2 is sleeved on the pressure tube 1, and the first end of the pressure tube 1 extends out of the first end of the return tube 2; the injection hole 11 is opposite to the opening of the first end of the return tube 2, and the opening of the first end of the return tube 2 is configured to receive a liquid jet. After the high-speed liquid jet sucks and cuts the tissue 30, it flows into the opening of the first end of the return tube 2 driven by the residual kinetic energy, and then is discharged along the return tube 2; the injection hole 11 and the opening of the first end of the return tube 2 are relatively spaced to form a cutting port 10, and the high-speed liquid jet contacts the tissue 30 of the surgical site through the cutting port 10, sucks and cuts the shallow 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 clear the cut tissue 30. The sleeve 3 is slidably mounted on the first end of the return tube 2. The sleeve 3 is driven to slide by an external force so that the first end of the sleeve 3 protrudes outside the first end of the return tube 2. The sleeve 3 extends out of the return tube 2 to partially cover the incision 10. The size of the incision 10 is changed to adjust the contact area between the liquid jet and the tissue 30, thereby adjusting the negative pressure value of the liquid jet sucking the tissue 30.

[0035] It should be noted that the number of the injection holes 11 in embodiment 1 of the present invention can be one or more, and the shape of the injection holes 11 can be circular, square, trapezoidal, etc., which is not limited here and can be adaptively designed according to actual usage.

[0036] Based on the above technical solution, the size of the cutting port 10 is changed through the cannula 3 to change the cutting area of ​​the tissue to adjust the negative pressure value of the suction force, thereby forming different cutting forces to meet the cutting requirements of different tissues, avoiding excessive bleeding of the tissue, and at the same time not affecting the cleaning or removal effect of the tissue, so as to cut and remove the tissue more reasonably.

[0037] In some embodiments, see Figure 1 -2. According to experimental statistics, the negative pressure value of the tissue to the liquid jet is between 0 and 0.1 MPa. Therefore, the sleeve 3 can be driven to slide on the return pipe 2 so that the distance L between the injection hole 11 and the opening of the first end of the sleeve 3 can be controlled to be 0-200 mm, for example, 1 mm, 10 mm, 20 mm, 50 mm, 80 mm, 200 mm, etc., to meet the negative pressure value requirements of different tissues.

[0038] In some embodiments, in order to position the injection hole 11 opposite to the opening of the first end of the return pipe 2, the injection hole 11 of Example 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 is connected to the interior of the pressure pipe 1, so that the high-pressure liquid 20 flows from the second end of the pressure pipe 1 to the end of the first end of the pressure pipe 1 and then is ejected from the injection hole 11, forming a liquid jet and flowing toward the opening of the first end of the return pipe 2.

[0039] In some embodiments, see Figure 1 、 3 The first end of the pressure tube 1 is provided with a cutting depth platform 12 extending axially outwardly along the return tube 2. The cutting depth platform 12 can be fixedly connected to the first end of the pressure tube 1. The cutting depth platform 12 is used to limit the diffusion range of the liquid jet ejected from the injection hole 11, thereby controlling the depth between the liquid jet and the cutting opening 10, thereby adjusting the cutting depth of the liquid jet on the tissue 30 to prevent damage to the healthy deep tissue.

[0040] In some embodiments, see Figure 2The return tube 2 is bent upward at a position near the second end of the sleeve 3 to form a bent portion 21. The angle α between the bent portion 21 and the horizontal plane ranges from 0 to 90 degrees, for example, 1 degree, 5 degrees, 10 degrees, 45 degrees, 60 degrees, 75 degrees, etc. In this way, by adjusting the angle of the return tube 2 to change the return direction of the liquid jet, the flow rate of the liquid jet is changed, and the negative pressure value of the liquid jet at the cutting port 10 is changed, forming different suction and cutting forces to meet the cutting requirements of different tissues. Generally speaking, the larger the angle α, the slower the flow rate of the liquid jet, and the smaller the suction and cutting force formed, thereby avoiding the risk of tissue trauma caused by excessive suction and cutting force.

[0041] In some embodiments, in order to fix the injection hole 11 and the opening of the first end of the return pipe 2 to face each other, the liquid injection device of Example 1 of the present invention further includes a fixing member 4, which is hollow inside and has a shape that matches the shape of the pressure pipe 1. The fixing member 4 is wrapped around the outer wall of the first end of the pressure pipe 1, and one end of the fixing member 4 is connected to the first end of the return pipe 2, so that the return pipe 2, the pressure pipe 1 and the fixing member 4 are fixed to form a whole, thereby preventing the pressure pipe 1 from changing its shape after colliding with the tissue, and ensuring that the injection hole 11 and the opening of the first end of the return pipe 2 are facing each other. For example, the fixing member 4 can be a scraper structure that can first cut the surgical site to expose the part that needs to be cut by liquid jet suction.

[0042] In some embodiments, the fixing member 4 is provided with a vent hole 41. Since the high-speed liquid jet forms a negative pressure vacuum environment inside the fixing member 4, in order to ensure that the fixing member 4, the pressure tube 1, and the return tube 2 are not compressed and deformed by the external atmospheric pressure, the fixing member 4 is provided with a vent hole 41 communicating with the interior thereof. The vent hole 41 is used to connect the interior of the fixing member 4 with the outside world. The outside air enters the interior of the fixing member 4 through the vent hole 41 under the action of the air pressure difference, thereby preventing the fixing member 4, the pressure tube 1, and the return tube 2 from being compressed and deformed.

[0043] In some embodiments, in order to prevent the fixing member 4 from being separated from the pressure tube 1, the fixing member 4 is bonded to the outer wall of the first end of the pressure tube 1 so that the fixing member 4 and the pressure tube 1 form a whole, effectively protecting the pressure tube 1 and improving the overall structural strength.

[0044] In some embodiments, in order to prevent the pressure tube 1 from moving in position within the return pipe 2 during operation of the liquid injection device, the outer wall of the second end of the pressure tube 1 of Example 1 of the present invention is bonded to the inner wall of the return pipe 2 so that the pressure tube 1 and the return pipe 2 form a whole, thereby ensuring the normal operation of the liquid injection device.

[0045] In some embodiments, the liquid injection device of the present invention also includes a handle portion (not shown in the figure) away from the first end of the return tube 2. The operator holds the handle portion to drive the return tube 2 and the first end of the pressure tube 1 to move to the tissue position of the surgical operation, so that the liquid injection device can smoothly suction and cut the tissue.

[0046] In summary, embodiment 1 of the present invention provides a liquid injection device for removing tissue, wherein the first end of the pressure tube 1 extends out of the first end of the return tube 2, so that the injection hole 11 on the pressure tube 1 is opposite to the opening of the first end of the return tube 2. When the high-pressure liquid 20 is ejected from the injection hole 11, a high-speed liquid jet is formed. The liquid jet forms a suction force with negative pressure at the position of the cutting port 10, which can suck the tissue 30 to form a cutting force and cut the tissue 30. The cut tissue 30 flows into the opening of the first end of the return tube 2 along the liquid jet with kinetic energy, and is then discharged along the return tube 2, thereby achieving the effect of clearing the cut tissue 30. At the same time, the high-speed liquid jet cleans the surgical site to improve the cleaning integrity of the cut tissue. A sleeve 3 is provided on the outside of the first end of the return tube 2. The sleeve 3 can slide along the axial direction of the return tube 2 to change the size of the cutting port 10, change the cutting area of ​​the tissue 30 to adjust the negative pressure value of the suction force, thereby forming different cutting forces to meet the cutting requirements of different tissues, avoiding excessive bleeding of the tissue, and at the same time not affecting the cleaning or removal effect of the tissue, so as to cut and remove the tissue more reasonably.

[0047] Example 2

[0048] Please refer to Figure 4 Embodiment 2 of the present invention provides a liquid injection device for removing tissue, which is similar to the liquid injection device of embodiment 1 above, except that: at least one first through hole 31 is formed on the side wall of the sleeve 3, and at least one second through hole 22 is formed on the side wall of the return pipe 2. The sleeve 3 can also rotate along the axis of the return pipe 2 to interconnect the at least one first through hole 31 and the at least one second through hole 22. In this way, by rotating the sleeve 3 to connect the plurality of first through holes 31 with the plurality of second through holes 22, external gas enters the interior of the return pipe 2 through the first through holes 31 and the second through holes 22 in sequence, changing the gas flow rate in the return pipe 2, thereby adjusting the negative pressure value of the incision 10 without changing the cutting area of ​​the incision 10, thereby adjusting the negative pressure value of the incision 10, thereby further meeting the cutting requirements of different tissues and improving the cleaning or removal effect of the tissue.

[0049] Furthermore, when the liquid injection device of Example 2 of the present invention includes a fixing part 4, at least one third through hole 42 is opened on the side wall of the fixing part 4. By rotating the sleeve 3 to connect the first through hole 31, the third through hole 42 and the second through hole 22 in sequence, the external gas enters the return pipe 2 through the first through hole 31, the third through hole 42 and the second through hole 22 in sequence, thereby changing the gas flow rate in the return pipe 2, thereby adjusting the negative pressure value of the cutting port 10 to meet the cutting requirements of different tissues.

[0050] In addition, other structures of the liquid ejecting device of the present embodiment 2 may refer to the liquid ejecting device of the above-mentioned embodiment 1, and detailed description thereof will be omitted here.

[0051] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A liquid injection device for removing tissue, characterized in that: include: a pressure tube, wherein a first end of the pressure tube is formed with a spray hole, the spray hole being opened at an end portion of the first end of the pressure tube, a second end of the pressure tube being used to pass high-pressure liquid, the spray hole being configured to form a liquid jet when the high-pressure liquid is ejected from the spray hole; a return pipe, the return pipe being sleeved on the pressure pipe, the first end of the pressure pipe extending out of the first end of the return pipe; the injection hole being opposite to the opening of the first end of the return pipe, the opening of the first end of the return pipe being configured to receive the liquid jet; the injection hole being spaced relative to the opening of the first end of the return pipe to form a cutout; as well as, a sleeve, the sleeve being sleeved on the first end of the return pipe and being capable of sliding along the axial direction of the return pipe so that the first end of the sleeve protrudes outside the first end of the return pipe to cover at least a portion of the incision; The return pipe is bent upward at a position close to the second end of the sleeve to form a bent portion, and the angle between the bent portion and the horizontal plane ranges from 0 to 90 degrees. The angle of the return pipe can be adjusted to change the return direction of the liquid jet.

2. The liquid injection device for removing tissue according to claim 1, wherein The distance between the injection hole and the opening of the first end of the sleeve is 0-200 mm.

3. The liquid injection device for removing tissue according to claim 1, wherein The first end of the pressure tube is bent so that the end of the first end of the pressure tube faces the opening of the first end of the return tube.

4. The liquid injection device for removing tissue according to claim 3, wherein: The end portion of the first end of the pressure pipe is provided with a cutting depth platform extending outwardly along the axial direction of the return pipe.

5. The liquid injection device for removing tissue according to any one of claims 1 to 4, characterized in that: It also includes a fixing piece, which is wrapped around the outer side wall of the first end of the pressure pipe, and one end of the fixing piece is connected to the first end of the return pipe.

6. The liquid injection device for removing tissue according to claim 5, wherein: The fixing piece is provided with a vent hole.

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