Medical tunneling device

Abstract

The application relates to the technical field of surgical instruments, and discloses a medical tunnel device, which comprises a hollow needle, a flexible pipe body, a bending part and a side branch part, a helical metal wire is arranged in the peripheral wall of the main supporting part, the hollow needle is movably sleeved on the outer side of the main supporting part, the bending part is connected with the front end of the main supporting part and located in the inner cavity of the main supporting part, the inside of the bending part is formed with a medicament cavity for containing hemostatic medicament, the side branch part is communicated with the main supporting part and extends obliquely relative to the main supporting part, a rigid supporting layer is arranged in the peripheral wall of the side branch part, one end of an inflation pipe is connected with a gas source, and the other end of the inflation pipe is connected with an inflation opening on a side branch end cover, the structure is simple, easy to produce and manufacture, and the medical tunnel device is favorable for reducing the damage to human soft tissues during the establishment of the medical tunnel.

Description

Technical Field

[0001] This invention relates to the field of surgical instrument technology, and more specifically to a medical tunneling device. Background Technology

[0002] Vascular bypass surgery is a classic procedure for vascular reconstruction in peripheral vascular diseases. During the procedure, a vascular access is established outside the anatomical structure to improve blood supply to organs distal to the occluded segment. Establishing an extraanatomical bypass requires creating a tunnel within soft tissue, which varies greatly in location and shape. Long tunnels also carry a risk of bleeding, ranging from mild local ecchymosis to severe hematoma and hemorrhagic shock, causing significant physical and psychological suffering for patients. Currently, artificial vascular bypass relies on tunneling devices to guide tunnel formation. However, existing tunneling devices are primarily made of metal with a fixed curvature, which is unsuitable for the diverse shapes and tissue thicknesses of the human body. Traditional tunneling procedures can also damage surrounding tissues, including blood vessels, lymphatic vessels, and nerves. Summary of the Invention

[0003] The purpose of this invention is to provide a medical tunneling device that has the advantages of simple structure, the ability to be twisted and changed angle, and reduced damage to human soft tissue.

[0004] To achieve the above objectives, the present invention provides a medical tunneling device, which includes:

[0005] Hollow needle;

[0006] The flexible tube includes a main support, a bending section, and a side branch. The main support has a spiral metal wire inside its peripheral wall, and a hollow needle is movably sleeved on the outside of the main support. The bending section is connected to the front end of the main support and is located in the inner cavity of the main support. The interior of the bending section forms a drug cavity for containing hemostatic agents. The side branch is connected to the main support and extends obliquely relative to the main support. The peripheral wall of the side branch has a rigid support layer.

[0007] The inflation tube has one end connected to the air source and the other end connected to the inflation port on the side support end cap.

[0008] In an embodiment of the present invention, the flexible tube is made of silicone rubber.

[0009] In an embodiment of the present invention, the medical tunneling device further includes a bracing assembly and a replaceable end cap. One end of the bracing assembly is located outside the flexible tube, and the other end extends into the main support portion and covers the end face of the bend. The replaceable end cap is located at the end of the main support portion away from the bend portion.

[0010] In an embodiment of the present invention, the tie rod assembly includes a tie rod and a release cover. One end of the tie rod is located on the outside of the flexible tube, and the other end of the tie rod extends into the side branch and the main support in sequence and is connected to the release cover. The release cover is detachably mounted on the end face of the bend.

[0011] In an embodiment of the present invention, the tie rod assembly further includes a pull ring disposed at the end of the tie rod away from the release cover.

[0012] In an embodiment of the present invention, an elastic support ring is provided at the end where the bent portion and the detachable cover are connected.

[0013] In an embodiment of the present invention, the release cover is provided with a cavity for locking the outer wall of the elastic support ring.

[0014] In an embodiment of the present invention, a side branch end cap is provided at the end of the side branch away from the main support, and the medical tunneling device also includes a filter layer disposed on the side of the side branch end cap facing the side branch.

[0015] In an embodiment of the present invention, the medical tunneling device further includes a replaceable end cap disposed at the end of the main support portion away from the bend portion.

[0016] In an embodiment of the present invention, a handle is provided on the hollow needle head.

[0017] In an embodiment of the present invention, a scale strip is provided on the outer peripheral wall of the main support portion.

[0018] The above technical solution involves a hollow needle, a flexible inflatable tube, and a bracing assembly. The hollow needle pierces the surface of human soft tissue to provide a tunnel entrance for establishing a subcutaneous tunnel. The flexible tube is used to free the human soft tissue based on the tunnel entrance to establish a medical tunnel and includes a main support, a side branch, and a bend. One end of the inflatable tube is connected to a gas source, and the other end is connected to the side branch of the flexible tube, allowing gas from the gas source to enter the inner cavity of the side branch and the main support through the inflatable tube. This allows the bend to extend outward, enabling the hemostatic agent in the drug cavity to diffuse outward and adhere to the wound to aid in hemostasis. The structure is simple, easy to manufacture, and helps reduce damage to human soft tissue during the establishment of the medical tunnel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first cross-sectional structure of the medical tunneling device in an embodiment of the present invention (the bent part is in a bent state);

[0020] Figure 2 This is a schematic diagram of the second cross-sectional structure of the medical tunneling device in an embodiment of the present invention (the bent part is in the unfolded state).

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Hollow needle 101 handle

[0023] 2. Flexible tube body 201 Main support section

[0024] 2011 Metal Wire 202 Bending Section

[0025] 2021 Drug cavity; 2022 Elastic support ring

[0026] 203 Side branch 2031 Side branch end cap

[0027] 2032 Inflation port 3 Inflation hose

[0028] 4. Tie rod assembly 401 Tie rod

[0029] 402 Removable cap 403 Pull ring

[0030] 5. Filter layer 6. Replaceable end caps Detailed Implementation

[0031] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] This invention provides a novel medical tunneling device, such as... Figure 1-2As shown, the medical tunneling device includes a hollow needle 1, a flexible tube 2, and an inflation tube 3. The hollow needle 1 is used during surgery to puncture the soft tissue, providing an entrance for the subsequent establishment of a subcutaneous tunnel. After the tunnel entrance is established, the flexible tube 2 is used to further penetrate the soft tissue to create a tunnel passage. The flexible tube 2 includes a main support 201, a bend 202, and a side branch 203. The hollow needle 1 is movably fitted onto the outside of the main support 201. Before the tunnel entrance is established, the hollow needle 1 is located at the front end of the main support 201. When the tunnel entrance is established, the hollow needle 1 and its inner main support... The hollow needle 1 enters the tunnel entrance together with the main support 201. After the tunnel entrance is established, the hollow needle 1 is moved backward along the axis of the main support 201 to prevent the hollow needle 1 from violently penetrating the soft tissue of the human body and causing secondary damage. The main support 201 has a spiral metal wire 2011 inside its peripheral wall. The spiral metal wire 2011 provides the main support 201 with a certain support performance and also allows it to be bent. This makes it easy to apply force to the main support 201 so that it can continue to penetrate and free the soft tissue of the human body to establish a tunnel passage. In addition, it also allows the main support 201 to bend and adjust at a certain angle. After entering the soft tissue of the human body, it can be well shaped, avoiding violent penetration; the front end of the bent part 202 is connected to the main support part 201 and is located in the inner cavity of the main support part 201. The interior of the bent part 202 forms a drug cavity 2021 for containing hemostatic agents. Specifically, the bent part 202 is located at the front end of the main support part 201 and is integrally formed with the main support part 201. When no tunnel is established, the bent part 202 bends inward in the inner cavity of the main support part 201. In the bent state, the bent part 202 forms a drug cavity 2021 inside, which contains hemostatic agents to help stop bleeding from the wound; the side branch 2 The 03 is connected to the main support 201 and extends obliquely relative to the main support 201. The peripheral wall of the side branch 203 is provided with a rigid support layer. Specifically, the side branch 203 is located near the tail end of the main support 201 and extends obliquely relative to the main support 201, leaving enough space for the hollow needle 1 to move backward. The rigid support layer enables the side branch 203 to have sufficient support and not bend arbitrarily. One end of the inflation tube 3 is connected to the air source, and the other end of the inflation tube 3 is connected to the side branch 203, so that the gas in the air source can enter the inner cavity of the side branch 203 and the main support 201 through the inflation tube 3.

[0033] Specifically, when using this medical tunneling device to create a tunnel, medical personnel apply force to the hollow needle 1, inserting it into the patient's soft tissue to establish a tunnel entrance. At this time, the main support portion 201 located inside the hollow needle 1 is also inserted into the soft tissue. Force is then applied to the main support portion 201 to move it forward, freeing it from the soft tissue and forming a tunnel. During tunnel formation, air can be injected into the air tube 3, allowing the gas from the air source to enter the main support portion 201 through the side branch 203. This causes the bent portion 202 to expand outwards. As the bent portion 202 expands outwards, the hemostatic agent in the drug chamber 2021 is pushed out and comes into contact with the soft tissue to stop bleeding from the soft tissue wound.

[0034] In one embodiment of the present invention, the outer wall of the flexible tube 2 is provided with a hydrophilic coating. Specifically, the hydrophilic coating can be a silicone rubber coating. The hydrophilic coating makes the friction on the surface of the flexible tube 2 uniform and stable, which helps to reduce friction with human soft tissue during tunnel construction. It will not cause the catheter to fall off due to friction during surgery, resulting in increased catheter friction or residues left in human soft tissue, thus ensuring a high safety factor. Furthermore, the surface of the flexible tube 2 with the hydrophilic coating has a certain lubricating effect, which helps to reduce the force required by medical staff when constructing the tunnel, making it easier for the tunneling device to detach from human soft tissue.

[0035] In one embodiment of the present invention, the medical tunneling device further includes a bracing assembly 4 and a replaceable end cap 6. One end of the bracing assembly 4 is located outside the flexible tube 2, and the other end extends into the main support portion 201 and covers the end face of the bend portion 202. During the establishment of the medical tunnel, one end of the bracing assembly 4 covers the end face of the bend portion 202 to seal the inner cavity of the main support portion 201 and the side branch portion 203. After the medical tunnel is established, medical personnel pull the end of the bracing assembly 4 located outside the flexible tube 2, causing the end of the bracing assembly 4 covering the end face of the bend portion 202 to detach from the bend portion 202. The replaceable end cap 6 is located at the end of the main support portion 201 away from the bend portion 202. Specifically, the replaceable end cap 6 is detachably mounted on the main support portion 201. When the bracing assembly 4 is pulled... Before 01, the replaceable end cap 6 is sealed on the main support 201 to ensure the sealing integrity of the entire inner cavity of the flexible tube 2, preventing gas leakage into the flexible tube 2 and preventing the bending part 202 from extending outward. The medical tunneling device also includes a guide tube (not shown in the figure) for connecting to the artificial blood vessel at one end. The artificial blood vessel and the guide tube are connected by sutures. The inner diameter of the main support 201 and the bending part 202 are both larger than the outer diameter of the guide tube. After the medical tunnel is established, the replaceable end cap 6 is removed, so that a passage is formed between the main support 201 and the bending part 202. The guide tube can then pass from one end of the passage to the other end, allowing the artificial blood vessel to pass through the medical tunnel. After the artificial blood vessel passes through, the flexible tube 2 can be withdrawn in the opposite direction to the tunnel establishment.

[0036] In one embodiment of the present invention, the tie rod assembly 4 includes a tie rod 401 and a release cover 402. One end of the tie rod 401 is located on the outside of the flexible tube 2, and the other end of the tie rod 401 extends into the side branch 203 and the main support 201 in sequence and is connected to the release cover 402. The release cover 402 is detachably covered on the end face of the bend 202. During the tunnel construction process, since the release cover 402 is covered on the end face of the bend 202, it can block the inner cavity of the main support 201 and the side branch 203 when the main support 201 is free from human soft tissue. It can also detach from the end face of the bend 202 after the tunnel is constructed, so that the inner cavities of the main support 201, the side branch 203 and the bend 202 are connected. After detaching from the end face of the bend 202, the release cover 402 is pulled into the inner cavity of the bend 202.

[0037] In one embodiment of the present invention, the bracing assembly 4 further includes a pull ring 403 disposed at the end of the bracing 401 away from the detachment cover 402. The structure is simple and facilitates medical personnel to apply force to the bracing 401 through the pull ring 403, thereby causing the bracing 401 to pull the detachment cover 402 away from the end face of the bent portion 202.

[0038] In one embodiment of the present invention, an elastic support ring 2022 is provided at the end where the bent portion 202 and the release cover 402 are connected. Specifically, the elastic support ring 2022 has an arc-shaped support body with an arc angle of 180°-240°, and is located in the lower semicircular portion of the elastic support ring 2022. This allows the upper part of the elastic support ring 2022 to be bent downwards and then connected to the release cover 402, which helps to strengthen the tightness of the connection between the two and prevents the release cover 402 from easily detaching from the end face of the bent portion 202. Furthermore, when the bent portion 202 is fully extended, the elastic support ring 2022 is located at the foremost end of the bent portion 202.

[0039] In one embodiment of the present invention, the release cover 402 is provided with a cavity for engaging the elastic support ring 2022. Specifically, the shape and size of the cavity are adapted to the shape and size of the elastic support ring 2022 after bending and folding, so that the two can form a good fit. The bent and folded elastic support ring 2022 is embedded in the cavity and forms a detachable connection with the release cover 402. The release cover 402 can be disengaged from the elastic support ring 2022 by moving it backward, thereby separating the release cover 402 from the bent part 202. This structural design allows the elastic support ring 2022 and the cavity to be tightly connected together, and can be easily and quickly separated. The structure is simple and easy to operate.

[0040] In one embodiment of the present invention, the side branch 203 is provided with a side branch end cap 2031 at the end away from the main support 201, and an air inlet 2032 is provided on the side branch end cap 2031. The side branch end cap 2031 is also provided with a through hole for the tie rod 401 to pass through. The medical tunnel device also includes a filter layer 5 provided on the side of the side branch end cap 2031 facing the side branch 203. The filter layer 5 is filter cotton, which is used to filter the gas and can effectively prevent external dirty gas from entering the side branch 203 through the through hole.

[0041] In one embodiment of the present invention, the hollow needle 1 is provided with a handle 101, which makes it easier for medical staff to move the hollow needle 1 by applying force to the handle 101, thereby improving the convenience of moving the hollow needle 1.

[0042] In one embodiment of the present invention, a scale bar (not shown in the figure) is provided on the outer peripheral wall of the main support part 201. The scale bar can accurately measure the depth of the main support part 201 entering the human soft tissue when it is free from the human soft tissue, so that medical staff can effectively grasp the depth of establishing the medical tunnel and reduce operation error.

[0043] This invention provides a medical tunneling device comprising a hollow needle, a flexible tube, an inflation tube, and a tensioning assembly. The hollow needle is used to pierce the surface of human soft tissue to provide a tunnel entrance for establishing a subcutaneous tunnel. The flexible tube is used to free the human soft tissue based on the tunnel entrance to establish a medical tunnel and includes a main support, a side branch, and a bending section. One end of the inflation tube is connected to an air source, and the other end of the inflation tube is connected to the side branch of the flexible tube, allowing gas from the air source to enter the inner cavity of the side branch and the main support through the inflation tube. This allows the bending section to extend outward, thereby allowing the hemostatic agent in the drug cavity to diffuse outward and adhere to the wound to aid in hemostasis. The device has a simple structure, is easy to manufacture, and helps to reduce damage to human soft tissue during the establishment of a medical tunnel.

[0044] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A medical tunneling device, comprising: The medical tunneling device comprises: a hollow needle (1); a flexible tube body (2) comprising a main supporting part (201), a bending part (202) and a side branch part (203), a helical metal wire (2011) being arranged in the peripheral wall of the main supporting part (201), the hollow needle (1) being movably sleeved on the outer side of the main supporting part (201); the bending part (202) being connected with the front end of the main supporting part (201) and located in the inner cavity of the main supporting part (201), an inner cavity (2021) for accommodating hemostatic agent being formed in the inner part of the bending part (202); the side branch part (203) being communicated with the main supporting part (201) and extending obliquely relative to the main supporting part (201), a rigid supporting layer being arranged in the peripheral wall of the side branch part (203); an inflation tube (3) having one end connected with a gas source and the other end connected with an inflation port (2032) on a side branch end cover (2031); a pull wire assembly (4) and a replaceable end cover (6), one end of the pull wire assembly (4) being located on the outer side of the flexible tube body (2), the other end of the pull wire assembly (4) extending into the main supporting part (201) and being covered on the end face of the bending part (202), the replaceable end cover (6) being arranged at the end of the main supporting part (201) away from the bending part (202), wherein the pull wire assembly (4) comprises a pull wire (401) and a disengagement cover (402), one end of the pull wire (401) being located on the outer side of the flexible tube body (2), the other end of the pull wire (401) extending into the side branch part (203) and the main supporting part (201) in sequence and being connected with the disengagement cover (402), the disengagement cover (402) being disengagingly covered on the end face of the bending part (202).

2. The medical tunnelor of claim 1, wherein, The flexible tube body (2) is made of silicone rubber material.

3. The medical tunnelor of claim 1, wherein, The pull wire assembly (4) further comprises a pull ring (403) arranged at the end of the pull wire (401) away from the disengagement cover (402).

4. The medical tunnelor of claim 1, wherein, The end of the bending part (202) connected with the disengagement cover (402) is provided with an elastic supporting ring (2022).

5. The medical tunnelor of claim 4, wherein, The disengagement cover (402) is provided with a recessed cavity for clamping the outer side wall of the elastic supporting ring (2022).

6. The medical tunnelor of claim 1, wherein, The end of the side branch part (203) away from the main supporting part (201) is provided with a side branch end cover (2031), and the medical tunneling device further comprises a filter layer (5) arranged on the side of the side branch end cover (2031) facing the side branch part (203).

7. The medical tunnelor of claim 1, wherein The hollow needle (1) is provided with a handle (101).

8. The medical tunneler according to any one of claims 1 to 7, wherein, The outer peripheral wall of the main supporting part (201) is provided with a scale bar.

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