Radial artery puncture indwelling sheath tube

Abstract

The utility model discloses a radial artery puncture indwelling sheathing canal, which relates to the technical field of medical instruments and comprises a sheathing canal seat, an expansion component, a three-way component, a sheathing canal body, a transition part and a guide wire. The length of the sheathing canal body is 1-3 cm so as to be used for blocking a radial artery puncture point, the end of the sheathing canal body is communicated with a guide wire used for being punctured into the radial artery through a conical transition part, an open hole is formed in the transition part, a circulation hole is formed in the guide wire, and the open hole and the circulation hole ensure the smoothness of blood flow of the punctured radial artery in the sheath retaining period. According to the device, the sheath tube can be indwelled, the smoothness of the blood flow of the punctured radial artery is ensured during the sheath indwelling period, thrombus is reduced, the smooth operation is ensured, and the device has high use value.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a radial artery puncture indwelling sheath. Background Art

[0002] With the gradual development of radial artery access surgery, radial artery access has become the preferred access for many neurointerventional surgeries. Neurointervention often encounters the need to arrange elective surgery after lesions are found in radial artery angiography, and sheaths are often used as access devices. The sheath includes a sheath seat, an expansion component, a three-way component and a sheath body. During the operation, the sheath body is inserted into the radial artery; but during use, it was found that the radial artery has a thinner diameter and a thicker sheath body, and the sheath cannot be left in place like the femoral artery access. It is easy to produce thrombosis and occlude the blood vessels, and the sheath body usually needs to be removed. However, during elective surgery, a second puncture of the radial artery (especially the distal radial artery) is difficult to succeed, which not only affects the radial approach surgery, but also causes pain to the patient. Utility Model Content

[0003] The purpose of the utility model is to solve the problems raised in the above background technology, and then proposes a radial artery puncture indwelling sheath.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A radial artery puncture indwelling sheath comprises a sheath seat, an expansion component, a three-way component, a sheath body, a transition portion and a guide wire; the sheath body is 1-3 cm long and is used to block the radial artery puncture point; the end of the sheath body is connected to a guide wire for puncturing the radial artery through a tapered transition portion; an opening is provided on the transition portion, and a flow hole is provided on the guide wire; the opening and the flow hole ensure the patency of blood flow in the punctured radial artery during the sheath indwelling period.

[0006] Furthermore, the sheath tube body and the transition portion are integrally formed to improve the connection strength and smoothness of the connection portion between the two.

[0007] Furthermore, the sheath body and the transition part are both made of nickel-titanium metal, and the sheath body and the transition part made of this material have better support and toughness.

[0008] Furthermore, the transition portion and the guidewire connection portion fit seamlessly and smoothly.

[0009] Furthermore, the end of the guide wire is formed with a tip of a conical structure to facilitate the guide wire to penetrate into the radial artery.

[0010] Furthermore, the outer surface of the guide wire is coated with a hydrophilic super-slip coating to improve the biocompatibility of the guide wire and reduce the friction resistance with the radial artery.

[0011] Furthermore, the inner cavity wall of the guidewire is provided with a reinforcing wire along its length direction to improve the structural strength of the guidewire and reduce the occurrence of breakage problems.

[0012] Furthermore, the reinforcing wire is made of nickel-titanium metal, which has excellent characteristics of shape memory function and superelasticity.

[0013] Furthermore, a spirally coiled fine steel wire is provided in the inner cavity of the guidewire to improve the guidewire's anti-bending ability, forward thrust and torsional force, so as to facilitate the guidewire to pass through the severe stenosis area in the radial artery, play a good supporting role, and enable the guidewire to return to its original shape after bending.

[0014] Furthermore, a nylon thread is implanted on the inner wall of the guidewire. The nylon thread has strong toughness and is resistant to stretching. Through the implantation of the nylon thread, even if the patient accidentally breaks the sheath body or the transition portion, the guidewire can be completely removed without causing serious consequences, thereby improving safety.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can leave a sheath tube in place, ensure smooth surgery, avoid pain to patients caused by secondary puncture, and avoid unsuccessful puncture that affects the operation; the radial artery is directly punctured through a guide wire, and the sheath tube body is used as a plug for the puncture point of the radial artery to avoid bleeding. At the same time, a flow hole is provided on the guide wire, and an opening is provided on the transition part, so that the patency of the blood flow of the punctured radial artery is guaranteed during the sheath retention period, and the generation of thrombus is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 is a schematic diagram of the position of the tip;

[0019] Figure 3 It is a schematic diagram of the position of the reinforcing wire;

[0020] Figure 4 It is a partial enlarged view of A in Figure 3;

[0021] Among them: 1. sheath seat; 2. expansion component; 3. three-way component; 4. sheath body; 5. transition part; 51. opening; 6. guide wire; 61. flow hole; 62. tip; 7. reinforcing wire. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0023] See attached Figure 1 As shown, a radial artery puncture indwelling sheath comprises a sheath seat, an expansion component, a three-way component, a sheath body, a transition portion and a guide wire; wherein, the sheath body is 1-3 cm long to block the radial artery puncture point to ensure that there is no bleeding, the end of the sheath body is connected to the guide wire through the tapered transition portion, the guide wire is used to puncture the radial artery, and the transition portion is provided with an opening, and the guide wire is provided with a flow hole, and the opening and the flow hole ensure the patency of the blood flow in the punctured radial artery during the sheath retention period.

[0024] During the specific implementation of the device, the guide wire is inserted into the radial artery, the transition part serves as a connection as the tail end, and the sheath body serves as a blockage for the puncture point of the radial artery to prevent bleeding. At the same time, a flow hole is provided on the guide wire and an opening is provided on the transition part, so that the patency of the blood flow in the punctured radial artery is guaranteed during the sheath retention period, and the formation of thrombus is reduced. In addition, during the flushing process with heparin water, the heparin water will flow out from the flow hole and the opening. In this way, even if there is a small amount of thrombus in the contact part, it can be dissolved by the heparin water flowing out through the flow hole and the opening.

[0025] In the above scheme, the sheath body and the transition part are integrally formed to improve the connection strength and smoothness of the connecting part between the two, and the sheath body and the transition part are both made of nickel-titanium metal, which has better support and toughness.

[0026] In the above solution, the transition portion and the guide wire connection portion fit seamlessly and smoothly.

[0027] In addition, considering the convenience of inserting the guidewire into the radial artery, Figure 2 As shown, the end of the guide wire is formed with a tip of a conical structure. In addition, the outer surface of the guide wire is coated with a hydrophilic super-slip coating to improve the biocompatibility of the guide wire and reduce the friction resistance with the radial artery.

[0028] Among them, considering the structural strength of the guide wire and reducing the occurrence of breakage problems, this application proposes the following solutions:

[0029] In one of the options, refer to the attached Figure 3 -Attached Figure 4As shown, a reinforcing wire is provided along the length direction of the inner wall of the guide wire, and the reinforcing wire is made of nickel-titanium metal, which has the excellent characteristics of shape memory function and superelasticity.

[0030] In another embodiment, a spirally coiled fine steel wire (not shown) is provided in the inner lumen of the guide wire. The fine steel wire enhances the flexibility of the guide wire, improves its anti-bending ability, forward thrust and torsional force, facilitates the guide wire to pass through the severe stenosis area in the radial artery, and plays a good supporting role, so that the guide wire can still return to its original shape after bending.

[0031] In other schemes, a nylon thread (not shown) is implanted on the inner wall of the guidewire. The nylon thread is tough and stretch-resistant. Through the implantation of the nylon thread, even if the patient accidentally breaks the sheath body or the transition part, the guidewire can be completely removed without causing serious consequences, thereby improving safety.

[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A radial artery puncture indwelling sheath, comprising a sheath seat, an expansion component, a three-way component and a sheath body, characterized in that: It also includes a transition part and a guide wire; the sheath body is 1-3 cm long for blocking the radial artery puncture point, the end of the sheath body is connected to the guide wire for piercing the radial artery through the tapered transition part, and the transition part is provided with an opening, and the guide wire is provided with a flow hole.

2. A radial artery puncture indwelling sheath according to claim 1, characterized in that: The sheath tube body and the transition portion are integrally formed.

3. A radial artery puncture indwelling sheath according to claim 1 or 2, characterized in that: The sheath body and the transition part are both made of nickel-titanium metal.

4. The radial artery puncture indwelling sheath according to claim 1, characterized in that: The transition portion and the guide wire connecting portion are seamlessly fitted and smooth.

5. The radial artery puncture indwelling sheath according to claim 1, characterized in that: The end of the guide wire is formed with a tip having a conical structure.

6. The radial artery puncture indwelling sheath according to claim 1, characterized in that: The outer surface of the guide wire is also coated with a hydrophilic super-slip coating.

7. The radial artery puncture indwelling sheath according to claim 1, characterized in that: The inner cavity wall of the guide wire is provided with a reinforcing wire along its length direction.

8. The radial artery puncture indwelling sheath according to claim 7, characterized in that: The reinforcing wire is made of nickel-titanium metal.

9. The radial artery puncture indwelling sheath according to claim 1, characterized in that: A fine steel wire coiled in a spiral shape is arranged in the inner cavity of the guide wire.

10. The radial artery puncture indwelling sheath according to claim 1, characterized in that: A nylon thread is implanted on the inner cavity wall of the guide wire.

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