A medical sheath

Abstract

The present invention provides a medical sheath, belonging to the technical field of medical devices, comprising: a tube body and an operating part, the operating part is connected to one end of the tube body, a first channel and a second channel parallel to each other are opened in the tube body, and the first channel and the second channel both penetrate the operating end. During surgery, equipment such as a dilator is transported through the first channel, and equipment such as angiographic catheter is transported through the second channel, so that there is no need to establish an additional arterial access outside the sheath, reducing the occurrence of complications and improving safety during surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a medical sheath tube. Background Art

[0002] With the aging of the population, the incidence of structural heart disease has been increasing year by year. After the vigorous development of implantable and interventional medical devices in recent years, major medical device manufacturers have relatively mature solutions for structural heart disease.

[0003] Common structural heart diseases are often treated with aortic valve replacement surgery, and interventional valves have gradually become one of the mainstream products due to their advantages of less trauma, easy recovery and low risk. Interventional valves, whether self-expanding valves or balloon-expandable valves, use a delivery system to deliver the artificial valve to the location of the native valve, requiring a larger sheath as the access route. At the same time, an additional arterial access route must be established on one side of the sheath to deliver angiography catheters and other equipment for aortic root angiography. However, the additional arterial access route is prone to complications, affecting the safety of the operation. Summary of the invention

[0004] Therefore, in order to overcome the defect that an additional arterial access needs to be established during surgery, reduce the risk of complications, and improve safety during surgery, the present invention provides a medical sheath.

[0005] The medical sheath provided by the present invention comprises:

[0006] A tube body, wherein a first channel and a second channel parallel to each other are formed in the tube body;

[0007] The operating part is connected to one end of the tube body, and the first channel and the second channel both penetrate the operating part and the tube body along the axial direction of the tube body.

[0008] Optionally, the inner diameter of the second channel is smaller than the inner diameter of the first channel.

[0009] Optionally, the cross-sectional shape of the first channel includes a first inferior arc segment and straight line segments connecting two ends of the first inferior arc segment, and the straight line segments are perpendicular to a line connecting the center of the first inferior arc segment and the center of the second channel cross-sectional shape.

[0010] Optionally, the cross-sectional shape of the tube body includes a second inferior arc segment and a protruding segment connected to both ends of the second inferior arc segment and protruding toward the center of a circle away from the inferior arc segment, the second inferior arc segment surrounds the outside of the first inferior arc segment, and the second channel is arranged between the protruding segment and the straight line segment.

[0011] Optionally, the operating portion is a cylindrical structure with a diameter larger than the outer diameter of the tube body, and the operating portion and the tube body are connected at a connection point through a conical structure transition.

[0012] Optionally, an inner diameter of the first channel in the operating portion is larger than an inner diameter in the tube body, and an inner diameter of the first channel in the tapered structure gradually decreases from the operating portion to the tube body.

[0013] Optionally, an end of the tube body away from the operating portion is a tip, and both the first channel and the second channel penetrate the tip.

[0014] Optionally, the end surface diameter of the tip is larger than the inner diameter of the first channel.

[0015] Optionally, the first channel and the second channel are formed with rounded corners at the openings on the tip.

[0016] Optionally, the outer surface of the tip is provided with a developing material, and / or the outer surface of the tube body is provided with a hydrophilic coating.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The medical sheath provided by the present invention can deliver instruments such as dilators through the first channel and auxiliary instruments such as angiographic catheters through the second channel during surgery, thereby eliminating the need to establish an additional arterial access outside the sheath, reducing the risk of complications during surgery and improving safety.

[0019] 2. The medical sheath provided by the present invention, through the cross-sectional shape design of the first channel, the second channel and the tube body, can ensure that the first channel has a large enough space for instruments such as dilators to pass through, and will not excessively increase the cross-sectional area of ​​the tube body due to the opening of the second channel, thereby facilitating the movement of the tube body in the arterial blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of the medical sheath provided by the present invention;

[0022] Figure 2 for Figure 1 Sectional view along the A-A direction;

[0023] Figure 3 for Figure 2 Cross-sectional view along the B-B direction;

[0024] Figure 4 A partial view showing the structure of the operating unit;

[0025] Figure 5 A partial view showing the tip structure.

[0026] Explanation of the accompanying drawings: 1. tube body; 2. operating part; 3. tip; 4. first channel; 5. second channel; 6. protruding structure; 7. conical structure. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] This embodiment provides a medical sheath tube, referring to Figure 1The sheath includes a tube body 1 and an operating part 2. A first channel 4 and a second channel 5 are arranged axially along the tube body 1 and parallel to each other. The operating part 2 is arranged at one end of the tube body 1, and the first channel 4 and the second channel 5 pass through the tube body 1 and the operating part 2.

[0032] By using the above-mentioned sheath, a dilator can be used to enter the first channel 4 to assist the catheter instrument in entering the blood vessel, so that the interventional artificial valve can be delivered to the native valve more easily and safely. At the same time, an angiography catheter can be delivered through the second channel 5 for aortic root angiography without establishing an additional arterial access, thereby reducing the risk of complications caused by the establishment of an additional arterial access during the operation and improving the safety of the operation.

[0033] Specifically, refer to Figure 2 The cross-sectional shape of the first channel 4 is composed of a first inferior arc segment and straight line segments connecting the two ends of the first inferior arc segment. The cross-sectional shape of the second channel 5 is a circle, and the straight line segment is perpendicular to the line connecting the center of the first inferior arc segment and the center of the cross-sectional shape of the second channel 5.

[0034] Correspondingly, the cross-sectional shape of the tube body 1 consists of a second inferior arc segment and a convex segment connected to both ends of the second inferior arc segment, wherein the first inferior arc segment is concentrically arranged with the second inferior arc segment, the convex segment is correspondingly arranged at the straight line segment, the convex segment is convexly arranged in a direction away from the center of the second inferior arc segment, and the convex segment is a major arc tangent to the first inferior arc segment, and the second channel 5 is opened in the convex segment.

[0035] In this way, the first channel 4 can be ensured to have a large passing space, so that the dilator and other instruments can move smoothly in the first channel 4. The volume of the tube body 1 will not be excessively increased due to the opening of the second channel 5, so that the tube body 1 can also move smoothly in the artery. The wall thickness of the first channel 4 and the second channel 5 can also be made uniform, so that the overall structural strength of the sheath is better and the service life is longer.

[0036] As an alternative embodiment, the cross-section of the tube body 1 can be circular, elliptical, or other shapes, as long as it can ensure that there are no corners on the tube body 1 and it can move smoothly in the artery. Similarly, the cross-sections of the first channel 4 and the second channel 5 can both be circular, elliptical, polygonal, etc., as long as it can ensure that instruments such as dilators can move smoothly in the first channel 4 and devices such as angiographic catheters can move smoothly in the second channel 5.

[0037] Furthermore, an operating part 2 is provided at one end of the tube body 1. The operating part 2 is a cylindrical structure with a diameter larger than the outer diameter of the tube body 1, so that medical staff can hold it for operation. The operating part 2 is transitionally connected to the tube body 1 through a conical structure 7, so that no corners are formed between the tube body 1 and the operating part 2, making the outer wall of the entire sheath smooth and not easy to hurt the patient.

[0038] The diameter of the first channel 4 in the tapered structure 7 changes with the outer diameter of the tapered structure 7, so that the inner diameter of the first channel 4 gradually increases from the tube body 1 to the operating portion 2, and the inner diameter of the first channel 4 in the operating portion 2 also increases accordingly, expanding the opening area of ​​the first channel 4 on the operating portion, providing a guide for the entry of the instrument. The diameter of the second channel 5 in the tapered structure 7 and the operating portion 2 is the same as its inner diameter in the tube body 1, so as to prevent the second channel 5 from communicating with the first channel 4 with an enlarged inner diameter.

[0039] Of course, the inner diameter of the first channel 4 can remain unchanged, and the inner diameter of the second channel 5 can also be adaptively changed within the operating portion 2 and the conical structure 7 to ensure that the first channel 4 and the second channel 5 are not connected and the instrument can move smoothly.

[0040] Furthermore, one end of the tube body 1 away from the operating part 2 is set as a tip 3, and the tip 3 reduces the area of ​​the end of the tube body 1 to guide the tube body 1 to enter the blood vessel.

[0041] Furthermore, the end diameter of the tip 3 is larger than the inner diameter of the first channel 4, so as to avoid the end diameter of the tip 3 being consistent with the inner diameter of the first channel 4 and forming sharp corners. At the same time, the openings of the first channel 4 and the second channel 5 on the tip 3 are formed with rounded corners, so that the tip 3 is not easy to pierce the inner wall of the blood vessel.

[0042] In addition, the outer surface of the tip 3 is coated with a developing material, which makes it easy to observe the position of the tip 3 in the artery and facilitates the medical staff to control the position of the tip 3 during the operation. The outer surface of the tube body 1 is coated with a hydrophilic coating, which can make the tube body 1 move more smoothly in the artery and reduce the discomfort of the tube body 1 after entering the patient's body.

[0043] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A medical sheath, characterized in that: include: A tube body (1), wherein a first channel (4) and a second channel (5) are provided in the tube body (1), the cross-sectional shape of the first channel (4) comprises a first inferior arc segment and straight line segments connected at both ends of the first inferior arc segment, the straight line segment being perpendicular to a line connecting the center of the first inferior arc segment and the center of the cross-sectional shape of the second channel (5), the cross-sectional shape of the tube body (1) comprising a second inferior arc segment and convex segments connected at both ends of the second inferior arc segment and convex toward the center of the inferior arc segment, the second inferior arc segment surrounds the outside of the first inferior arc segment, and the second channel is arranged between the convex segment and the straight line segment; An operating portion (2) is connected to one end of a tube body (1); the first channel (4) and the second channel (5) both penetrate the operating portion (2) and the tube body (1) along the axial direction of the tube body (1); the operating portion (2) is a cylindrical structure having a diameter greater than the outer diameter of the tube body (1); the operating portion (2) and the tube body (1) are transitionally connected via a conical structure (7) at the connection point; the diameter of the first channel (4) located at the conical structure (7) is variable, while the diameter of the second channel (5) remains unchanged; wherein the inner diameter of the first channel (4) increases successively in the tube body (1), the conical structure (7) and the operating portion (2); the end of the tube body (1) away from the operating portion (2) is a tip (3), and the first channel (4) and the second channel (5) both penetrate the tip (3).

2. The medical sheath according to claim 1, characterized in that: The inner diameter of the second channel (5) is smaller than the inner diameter of the first channel (4).

3. The medical sheath according to claim 1, characterized in that: The inner diameter of the first channel (4) in the operating portion (2) is greater than the inner diameter in the tube body (1), and the inner diameter of the first channel (4) in the tapered structure (7) gradually decreases from the operating portion (2) to the tube body (1).

4. The medical sheath according to claim 1, characterized in that: The end surface diameter of the tip (3) is larger than the inner diameter of the first channel (4).

5. The medical sheath according to claim 4, characterized in that: The first channel (4) and the second channel (5) are formed with rounded corners at the openings on the tip (3).

6. The medical sheath according to claim 1, characterized in that: The outer surface of the tip (3) is provided with a developing material; And / or, the outer surface of the tube body (1) is provided with a hydrophilic coating.

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