Puncture sheath and medical device

Abstract

The present application relates to the technical field of medical equipment, and discloses a puncture sheath and medical equipment, the puncture sheath comprising a sheath body, a sleeve assembly, a driving member, a bending adjustment assembly and an inflatable mesh bag; the sleeve assembly comprises an outer sleeve and an inner sleeve; the driving member is arranged on the sheath body and is configured to drive the inner sleeve to move along the extension direction of the outer sleeve; the bending adjustment assembly is arranged on the sheath body and is configured to adjust the bending fixed angle of the sleeve assembly; the inflatable mesh bag is connected to the inner sleeve; the inner sleeve can drive the inflatable mesh bag to extend out of the outer sleeve and unfold, or the inner sleeve can drive the inflatable mesh bag to retract into the outer sleeve and fold. The present application can prevent the sleeve assembly from being uncontrollably bent due to the influence of the internal structure of the human body or medical equipment, and the inflatable mesh bag can be positioned in the human tissue or cavity, and in cooperation with the bending adjustment assembly, the puncture sheath can be prevented from moving and separating from the human tissue or cavity, and can be used to assist in carrying out pulmonary artery thrombectomy, protector recovery, deep vein thrombectomy and other interventional surgeries.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a puncture sheath and a medical device. Background Technology

[0002] A puncture sheath is a commonly used instrument in minimally invasive surgery or interventional medical procedures. Its primary function is to establish a pathway into human tissues or cavities, allowing catheters, guidewires, and other instruments to smoothly enter the target site. Establishing a pathway through the puncture sheath avoids secondary damage to human tissues or cavities caused by repeated instrument insertion and removal, reduces the risk of bleeding, and facilitates subsequent interventional treatments and diagnostic procedures, such as angiography, stent placement, and thrombolytic therapy.

[0003] The existing puncture sheath, once inserted into human tissue or cavity, can be fixed by the natural tension of the tissue or cavity. However, during the operation of the puncture sheath and the use of external instruments through it, the tubing is prone to bending and movement, which could lead to the risk of detachment from the human tissue or cavity. This makes the operation difficult, and the narrow interior of human tissue or cavity makes it easy for external instruments to come into contact with the internal cavity wall, thus affecting the use or retrieval of the external instruments. Summary of the Invention

[0004] The purpose of this invention is to provide a puncture sheath and medical device to solve the problems in the prior art where, during the operation of the puncture sheath and the use of external instruments through the puncture sheath, the tubing is easily bent and moved, which may lead to the risk of detachment from human tissue or cavity. The operation is difficult, and the internal space of human tissue or cavity is narrow, making it easy for external instruments to come into contact with the internal cavity wall, thus affecting the use or retrieval of external instruments. Furthermore, it can be used to assist in interventional procedures such as pulmonary artery thrombectomy, protector retrieval, and deep vein thrombectomy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a puncture sheath, comprising:

[0007] Sheath body, the sheath body having a lumen;

[0008] A sheath assembly, comprising an outer sheath and an inner sheath, wherein the outer sheath is fixedly connected to one end of the sheath body, the inner sheath is nested inside the outer sheath, and both the outer sheath and the inner sheath are connected to the lumen.

[0009] A driving member, disposed on the sheath body, is configured to drive the inner sleeve to move along the extension direction of the outer sleeve;

[0010] A bending adjustment component is disposed on the sheath body and configured to adjust the bending fixing angle of the sleeve assembly;

[0011] An expandable net bag is connected to the inner sleeve; when the driving member drives the inner sleeve to move, the inner sleeve can cause the expandable net bag to extend out of the outer sleeve and unfold, or the inner sleeve can cause the expandable net bag to retract into the outer sleeve and tighten.

[0012] As an alternative to the aforementioned puncture sheath, the bending assembly includes a bending knob, a winding roller, a first guide roller group, a second guide roller group, a first traction rope, and a second traction rope. The bending knob is rotatably mounted on the sheath body. The winding roller is coaxially connected to the rotating shaft of the bending knob. Both the first guide roller group and the second guide roller group are located within the cavity. One end of the first traction rope is wound around the winding roller, and the other end of the first traction rope is guided by the first guide roller group and passes through the outer tube along its extension direction. One end of the second traction rope is wound around the winding roller, and the other end of the second traction rope is guided by the second guide roller group and passes through the outer tube along its extension direction. The first guide roller group and the second guide roller group are located on opposite sides of the inner sheath, and the winding directions of the first traction rope and the second traction rope on the winding roller are opposite.

[0013] As an alternative to the aforementioned puncture sheath, both the first traction rope and the second traction rope have anchors connected to one end inside the outer sheath.

[0014] As an alternative to the aforementioned puncture sheath, the winding roller is provided with a dividing protrusion around its circumference, and the first traction rope and the second traction rope are respectively located on both sides of the dividing protrusion.

[0015] As an alternative to the aforementioned puncture sheath, the driving component includes a push block and a connecting rod connected to the push block. The push block is movably disposed outside the sheath body along the extension direction of the sheath body, and the connecting rod can pass through the sheath body and connect to the inner sleeve.

[0016] As an alternative to the aforementioned puncture sheath, the puncture sheath further includes a sealing membrane, the outer periphery of which is connected to the sheath body, and the connecting rod can pass through and connect to the sealing membrane.

[0017] As an alternative to the aforementioned puncture sheath, the puncture sheath further includes an aspiration catheter, one end of which passes through the sheath and connects to the inner cannula, and the other end of which can be connected to an aspiration device.

[0018] As an alternative to the aforementioned puncture sheath, the puncture sheath further includes a drainage catheter, one end of which passes through the sheath and communicates with the lumen, and the other end of which can be connected to an air venting device.

[0019] As an alternative to the aforementioned puncture sheath, the puncture sheath further includes a sealing knob assembly connected to the other end of the sheath body away from the cannula assembly, and the sealing knob assembly is used to open or seal the lumen.

[0020] On the other hand, the present invention provides a medical device including the puncture sheath as described above.

[0021] The beneficial effects of this invention are as follows:

[0022] The puncture sheath includes a sheath body, a cannula assembly, a drive mechanism, a bending adjustment mechanism, and an expandable mesh pouch. The sheath body has a lumen. The cannula assembly includes an outer cannula and an inner cannula. The outer cannula is fixedly connected to one end of the sheath body, and the inner cannula is nested within the outer cannula. Both the outer and inner cannulas communicate with the lumen, thus forming a channel through which a dilator can be inserted. This combination of the puncture sheath and dilator facilitates the insertion of the puncture sheath into human tissue or cavities. After the dilator is withdrawn, the medical device can pass through this channel to facilitate subsequent interventional treatments and diagnostic procedures. The drive mechanism, located in the sheath body, is configured to drive the inner cannula to move along the extension direction of the outer cannula. The expandable mesh pouch is connected to the inner cannula, allowing the drive mechanism to move the inner cannula and the expandable mesh pouch to adjust its position relative to the outer cannula. When the drive mechanism moves the inner cannula, the inner cannula can extend the expandable mesh pouch out of the outer cannula and unfold, or the inner cannula can retract the expandable mesh pouch back into the outer cannula and tighten. The bending adjustment component is located within the sheath and is configured to adjust the bending angle of the cannula assembly, allowing the cannula assembly to bend and rotate. After bending, the angle is fixed to prevent uncontrollable bending caused by the internal structure of the human body or medical devices. When the expandable mesh is in the deployed state, it can be positioned within the human tissue or cavity. Together with the bending adjustment component, it prevents the puncture sheath from moving and detaching from the human tissue or cavity. The expandable mesh also forms a protective structure to protect the internal cavity wall of the human tissue or cavity, while preventing the medical device from contacting the internal cavity wall at the entrance, which could affect the use or retrieval of the medical device. The outer sheath does not need to move when the expandable mesh is deployed or retracted; only the drive mechanism needs to be operated. Therefore, the puncture sheath is relatively easy to operate and can be used to assist in interventional procedures such as pulmonary thrombectomy, protector retrieval, and deep vein thrombectomy. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the puncture sheath provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the first part of the puncture sheath provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the second part of the puncture sheath provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the third part of the puncture sheath provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Sheath body; 2. Sleeve assembly; 21. Outer sleeve; 211. Free end; 22. Inner sleeve; 3. Drive component; 31. Push block; 32. Connecting rod; 4. Bending assembly; 41. Bending knob; 42. Winding roller; 43. First guide roller group; 44. Second guide roller group; 45. First traction rope; 46. Second traction rope; 47. Anchoring component; 5. Expandable net bag; 6. Suction conduit; 7. Drainage conduit; 8. Sealing knob assembly; 9. Expander. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figures 1-4 As shown, this embodiment provides a puncture sheath for establishing a channel to enter human tissue or cavity.

[0034] The puncture sheath includes a sheath body 1, a cannula assembly 2, a drive component 3, a bending adjustment component 4, and an expandable mesh bag 5. The sheath body 1 has a lumen, and the cannula assembly 2 includes an outer cannula 21 and an inner cannula 22. The outer cannula 21 is fixedly connected to one end of the sheath body 1, and the inner cannula 22 is nested inside the outer cannula 21. Both the outer cannula 21 and the inner cannula 22 communicate with the lumen, thereby forming a channel between the sheath body 1 and the cannula assembly 2. The dilator 9 can be inserted through this channel, so that the puncture sheath and the dilator 9 form a combined structure to assist the puncture sheath in entering human tissue or cavity. After the dilator 9 is withdrawn, the medical device can pass through this channel to facilitate subsequent interventional treatments and diagnostic procedures.

[0035] Meanwhile, the driving element 3 is located on the sheath body 1 and is configured to drive the inner sleeve 22 to move along the extension direction of the outer sleeve 21. The expandable net 5 is connected to the inner sleeve 22, so the driving element 3 can drive the inner sleeve 22 to move the expandable net 5 to adjust the position of the expandable net 5 relative to the outer sleeve 21. When the driving element 3 drives the inner sleeve 22 to move, the inner sleeve 22 can drive the expandable net 5 to extend out of the outer sleeve 21 and unfold, or the inner sleeve 22 can drive the expandable net 5 to retract into the outer sleeve 21 and tighten. Optionally, the driving element 3 includes two elements, which are located on opposite sides of the sheath body 1. By setting two driving elements 3, the coaxiality of the inner sleeve 22 and the outer sleeve 21 during and after movement can be improved, thereby improving the stability of the movement of the inner sleeve 22 relative to the outer sleeve 21.

[0036] The bending adjustment component 4 is located on the sheath body 1 and is configured to adjust the bending angle of the cannula assembly 2, so that the cannula assembly 2 can bend in a direction. After bending, the bending angle can be fixed to prevent the cannula assembly 2 from being uncontrollably bent due to the influence of the internal structure of the human body or medical devices. When the expandable net 5 is in the unfolded state, the expandable net 5 can be positioned in the human tissue or cavity. In conjunction with the bending adjustment component 4, it can prevent the puncture sheath from moving and causing it to detach from the human tissue or cavity. The expandable net 5 can form a protective structure to protect the internal cavity wall of the human tissue or cavity, and at the same time prevent the medical device from contacting the internal cavity wall at the entrance, which would affect the use or recycling of the medical device. The outer tube 21 does not need to move when the expandable net 5 is unfolded or retracted; only the driving component 3 needs to be operated. Therefore, the operation of this puncture sheath is relatively simple. Optionally, when the expandable net bag 5 extends out of the outer sleeve 21 and unfolds, the expandable net bag 5 has a funnel-shaped structure. The funnel-shaped expandable net bag 5 has a stable structure and can effectively maintain its shape, avoiding deformation caused by external force impact that would affect the use of the puncture sheath. The puncture sheath can also be used to assist in interventional procedures such as pulmonary artery thrombectomy, protector retrieval, and deep vein thrombectomy.

[0037] Furthermore, the puncture sheath also includes a sealing knob assembly 8, which is connected to the other end of the sheath body 1 away from the cannula assembly 2. The sealing knob assembly 8 is used to open or close the lumen, thereby facilitating the use of the dilator 9 and medical devices when the lumen is opened, and preventing liquid from flowing out of the sheath body 1 when the lumen is closed.

[0038] like Figures 1-3As shown, the bending assembly 4 includes a bending knob 41, a winding roller 42, a first guide roller group 43, a second guide roller group 44, a first traction rope 45, and a second traction rope 46. The bending knob 41 is rotatably mounted on the sheath body 1. The winding roller 42 is coaxially connected to the rotating shaft of the bending knob 41, so that rotating the bending knob 41 can drive the winding roller 42 to rotate. The first guide roller group 43 and the second guide roller group 44 are both located inside the tube cavity. One end of the first traction rope 45 is wound around the winding roller 42, and the other end of the first traction rope 45 passes through the outer tube 21 along the extension direction of the outer tube 21 via the guidance of the first guide roller group 43. Thus, the first guide roller group 43 can support and redirect the first traction rope 45. One end of the second traction rope 46 is wound around the winding roller 42, and the first guide roller group 43... The other end of the second traction rope 46 is guided by the second guide roller group 44 and passes through the outer sleeve 21 along the extension direction of the outer sleeve 21. Thus, the second guide roller group 44 can support and redirect the second traction rope 46. At the same time, the first guide roller group 43 and the second guide roller group 44 are located on opposite sides of the inner sleeve 22, and the first traction rope 45 and the second traction rope 46 are wound in opposite directions on the winding roller 42. Thus, after rotating the winding roller 42 by the bending knob 41, one of the first traction rope 45 and the second traction rope 46 can be unloaded and the other can be wound up, thereby achieving the bending of the outer sleeve 21 and the bending of the entire sleeve assembly 2. The bending angle of the sleeve assembly 2 is fixed due to the influence of the first traction rope 45 and the second traction rope 46.

[0039] Specifically, the first guide roller group 43 includes several first guide rollers, and the second guide roller group 44 includes several second guide rollers. The positions and axial directions of the several first guide rollers and several second guide rollers in the tube cavity can be adjusted. After the several first guide rollers support the first traction rope 45 in sequence, and the several second guide rollers support the second traction rope 46 in sequence, the direction of the first traction rope 45 and the second traction rope 46 can be changed.

[0040] Furthermore, each of the first traction rope 45 and the second traction rope 46 has an anchor 47 connected to one end inside the outer sleeve 21. The anchor 47 ensures that the ends of the first traction rope 45 and the second traction rope 46 are fixed inside the outer sleeve 21, preventing them from detaching from the outer sleeve 21 due to excessive pulling force. Optionally, the anchor 47 is located on the side closer to the sheath body 1 relative to the expandable net bag 5, thereby preventing the bending of the sleeve assembly 2 from affecting the unfolding and retraction of the expandable net bag 5. Optionally, the winding roller 42 is provided with a dividing protrusion around its circumference, with the first traction rope 45 and the second traction rope 46 located on opposite sides of the dividing protrusion. This separation prevents the first traction rope 45 and the second traction rope 46 from tangling on the winding roller 42, thus affecting the subsequent normal use of the piercing sheath.

[0041] Furthermore, the driving component 3 includes a push block 31 and a connecting rod 32 connected to the push block 31. The push block 31 is movably disposed outside the sheath body 1 along the extending direction of the sheath body 1. The connecting rod 32 can pass through the sheath body 1 and connect to the inner sleeve 22, so that the operator can push the push block 31 to move on the sheath body 1, causing the push block 31 to drive the inner sleeve 22 to move through the connecting rod 32, ultimately realizing the expansion or contraction of the expandable net bag 4. Specifically, a groove communicating with the cavity is opened at the side end of the sheath body 1, and the connecting rod 32 passes through the groove and moves along the groove. The puncture sheath also includes a sealing membrane, the outer periphery of which is connected to the sheath body 1. The connecting rod 32 can pass through and connect to the sealing membrane, so that the sealing membrane can seal the gap through which the connecting rod 32 passes through the sheath body 1, preventing liquid leakage.

[0042] like Figure 1 and Figure 4 As shown, the free end 211 of the outer tube 21 is arranged in a constricted conical structure. When the dilator 9 passes through the sheath 1, the inner tube 22 and the outer tube 21 in sequence, the free end 211 of the outer tube 21 can fit against the dilator 9. By tightly fitting the free end 211 of the outer tube 21 against the dilator 9, the damage caused when the combined structure of the puncture sheath and the dilator 9 is inserted into human tissue or cavity can be reduced.

[0043] Furthermore, the puncture sheath also includes an aspiration catheter 6. One end of the aspiration catheter 6 passes through the sheath body 1 and connects to the inner cannula 22. The other end of the aspiration catheter 6 can be connected to an aspiration device. This connection via the aspiration catheter 6 provides additional negative pressure to the inner cannula 22 of the puncture device, providing additional negative pressure for traditional mechanical thrombectomy, preventing thrombus escape during thrombectomy, and allowing direct aspiration of proximal thrombi as a thrombectomy method. Optionally, the aspiration device is a suction device. Simultaneously, the puncture sheath also includes a venting catheter 7. One end of the venting catheter 7 passes through the sheath body 1 and connects to the lumen. The other end of the venting catheter 7 can be connected to an air venting device. This connection via the venting catheter 7 allows for inflation of the puncture device, thereby venting the gas in the gap between the inner cannula 22 and the outer cannula 21 through the physical mechanism of pressure difference and gas flow, preventing medical risks caused by gas entering human tissue or cavities. Optionally, the air venting device is a syringe.

[0044] This embodiment also provides a medical device, including the puncture sheath as described above. By using the puncture sheath as described above, the medical device can prevent the puncture sheath from moving and detaching from human tissue or cavity. The expandable net 5 of the puncture sheath can form a protective structure to protect the internal cavity wall of human tissue or cavity, and at the same time prevent the medical device from contacting the internal cavity wall at the entrance, which would affect the use or recycling of the medical device. The outer tube 21 of the expandable net 5 does not need to move when it is expanded or contracted; only the driving member 3 needs to be operated. Therefore, the puncture sheath is easy to operate.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A puncture sheath, characterized in that, include: Sheath body (1), the sheath body (1) having a lumen; The sleeve assembly (2) includes an outer sleeve (21) and an inner sleeve (22). The outer sleeve (21) is fixedly connected to one end of the sheath body (1), and the inner sleeve (22) is nested inside the outer sleeve (21). Both the outer sleeve (21) and the inner sleeve (22) are connected to the lumen. A driving member (3) is disposed on the sheath body (1) and configured to drive the inner sleeve (22) to move along the extension direction of the outer sleeve (21); A bending adjustment component (4) is disposed on the sheath body (1) and configured to adjust the bending fixed angle of the sleeve assembly (2); An expandable net bag (5) is connected to the inner sleeve (22); when the driving member (3) drives the inner sleeve (22) to move, the inner sleeve (22) can drive the expandable net bag (5) to extend out of the outer sleeve (21) and unfold, or the inner sleeve (22) can drive the expandable net bag (5) to retract into the outer sleeve (21) and tighten. The bending assembly (4) includes a bending knob (41), a winding roller (42), a first guide roller group (43), a second guide roller group (44), a first traction rope (45), and a second traction rope (46). The bending knob (41) is rotatably mounted on the sheath (1). The winding roller (42) is coaxially connected to the rotating shaft of the bending knob (41). The first guide roller group (43) and the second guide roller group (44) are both located inside the tube. One end of the first traction rope (45) is wound around the winding roller (42), and the other end of the first traction rope (45) passes through the first guide roller group (46). The guide of the first guide roller (43) passes through the outer tube (21) along the extension direction of the outer tube (21); one end of the second traction rope (46) is wound around the winding roller (42), and the other end of the second traction rope (46) passes through the outer tube (21) along the extension direction of the outer tube (21) via the guide of the second guide roller group (44); the first guide roller group (43) and the second guide roller group (44) are located on opposite sides of the inner tube (22), and the first traction rope (45) and the second traction rope (46) are wound in opposite directions on the winding roller (42).

2. The puncture sheath according to claim 1, characterized in that, The first traction rope (45) and the second traction rope (46) are both connected to an anchor (47) at one end inside the outer tube (21).

3. The puncture sheath according to claim 1, characterized in that, The winding roller (42) is provided with a dividing protrusion around its circumference, and the first traction rope (45) and the second traction rope (46) are located on both sides of the dividing protrusion.

4. The puncture sheath according to claim 1, characterized in that, The driving component (3) includes a push block (31) and a connecting rod (32) connected to the push block (31). The push block (31) is movably disposed outside the sheath (1) along the extension direction of the sheath body (1). The connecting rod (32) can pass through the sheath body (1) and connect to the inner sleeve (22).

5. The puncture sheath according to claim 4, characterized in that, The puncture sheath also includes a sealing membrane, the outer periphery of which is connected to the sheath body (1), and the connecting rod (32) can pass through and be connected to the sealing membrane.

6. The puncture sheath according to claim 1, characterized in that, The puncture sheath also includes an aspiration catheter (6), one end of which passes through the sheath body (1) and is connected to the inner sheath (22), and the other end of which can be connected to an aspiration device.

7. The puncture sheath according to claim 1, characterized in that, The puncture sheath also includes a draining catheter (7), one end of which passes through the sheath body (1) and connects to the lumen, and the other end of which can be connected to an exhaust device.

8. The puncture sheath according to any one of claims 1 to 7, characterized in that, The puncture sheath also includes a sealing knob assembly (8), which is connected to the other end of the sheath body (1) away from the cannula assembly (2) and is used to open or seal the lumen.

9. A medical device, characterized in that, Includes the puncture sheath as described in any one of claims 1 to 8.

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