Double-cavity micro catheter

Abstract

The utility model discloses a double-cavity micro-catheter which comprises a main micro-catheter and an auxiliary micro-catheter, and the auxiliary micro-catheter is fixed on the side wall of the front end of the main micro-catheter. The structure is used in cooperation with the micro guide wire, stent thrombectomy can be conducted under the condition that the micro guide wire is reserved, the stent thrombectomy device can rapidly enter a micro guide pipe and a thrombectomy stent again after one-time stent thrombectomy fails, the difficulty that the micro guide wire and the micro guide pipe pass through a lesion blood vessel twice is reduced, and then the success rate of thrombectomy operation is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to microcatheter technical field, concretely relates to a double -cavity microcatheter. BACKGROUND

[0002] In the operation of cerebral infarction thrombectomy, stent thrombectomy is the most important technology at present. The specific implementation process is as follows, micro guide wire and microcatheter are used to pass through the cerebral vascular occlusion site and reach the distal normal blood vessel position, then the micro guide wire is withdrawn, and the microcatheter is reserved. The thrombectomy stent is introduced into the intracranial vascular occlusion distal end through the microcatheter, then the thrombectomy stent is fixed, the microcatheter is withdrawn, and the thrombectomy stent is released. After the thrombectomy stent is released for 3-5 minutes, the thrombectomy stent is pulled back, and the thrombus is pulled out of the body.

[0003] In the specific processing process, the stent thrombectomy is not successful at one time, so the process of reusing micro guide wire and microcatheter to pass through the lesion site and then placing the stent for thrombectomy will be faced. After the lesion blood vessel is treated by the stent for thrombectomy once, the blood vessel can be damaged, and the difficulty of reusing micro guide wire and microcatheter to pass through the lesion blood vessel will increase, and even the micro guide wire and the microcatheter can not pass through again, which can cause the failure of the stent thrombectomy operation. UTILIZATIONAL CONTENT

[0004] In view of the defects in the prior art, the utility model provides a double -cavity microcatheter, which is used with micro guide wire, can reserve the micro guide wire to perform stent thrombectomy, and can quickly re-enter the microcatheter and thrombectomy stent after one-time stent thrombectomy failure, thereby reducing the difficulty of second micro guide wire and microcatheter passing through the lesion blood vessel again, and improving the success rate of thrombectomy operation.

[0005] A double -cavity microcatheter, comprising a main microcatheter and an auxiliary microcatheter, the auxiliary microcatheter is fixed on the front end side wall of the main microcatheter.

[0006] Preferably, the inner diameter of the main microcatheter is 0.45-0.55mm.

[0007] Preferably, the inner diameter of the front end of the main microcatheter is 0.50mm.

[0008] Preferably, the outer diameter of the front end of the main microcatheter is 0.6mm-0.7mm, and the outer diameter of the rear end of the main microcatheter is 0.8mm-0.85mm.

[0009] Preferably, the outer diameter of the front end of the main microcatheter is 0.66mm, and the outer diameter of the rear end of the main microcatheter is 0.83mm.

[0010] Preferably, the outer diameter of the auxiliary microcatheter is 0.55mm-0.60mm, and the inner diameter of the auxiliary microcatheter is 0.4mm-0.45mm.

[0011] Preferably, the auxiliary microcatheter is 0.57 mm in diameter and has an inner diameter of 0.42 mm.

[0012] Preferably, the length of the auxiliary microcatheter is 8mm-10mm.

[0013] The length of the main microcatheter is 155-160cm.

[0014] The beneficial effects of this invention are as follows: In this technical solution, an auxiliary microcatheter is connected to the front side wall of the main microcatheter. In specific use, the microguidewire passes through the auxiliary microcatheter, and the microguidewire and auxiliary microcatheter pass through the thrombus occlusion site. The auxiliary microcatheter pulls the main microcatheter through the thrombus occlusion site, and the thrombectomy stent enters the distal end of the intracranial vascular occlusion from the main microcatheter. The main microcatheter and auxiliary microcatheter are withdrawn, while the microguidewire is retained. After releasing the thrombectomy stent for 3-5 minutes, the thrombectomy stent is pulled back. In this way, the microguidewire is retained during thrombectomy. Even if the first thrombectomy is unsuccessful, the retained microguidewire can be used to place the double-lumen microcatheter and thrombectomy stent, thereby improving the success rate of the thrombectomy surgery. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the attached diagram, 1-main microcatheter, 2-auxiliary microcatheter. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment provides a dual-lumen microcatheter, including a main microcatheter 1 and an auxiliary microcatheter 2, wherein the auxiliary microcatheter 2 is fixed to the front end sidewall of the main microcatheter 1.

[0022] In this embodiment, an auxiliary microcatheter 2 is connected to the front side wall of the main microcatheter 1. In actual use, the microguidewire passes through the auxiliary microcatheter 2, and the microguidewire and auxiliary microcatheter 2 pass through the thrombus occlusion site. The auxiliary microcatheter 2 pulls the main microcatheter 1 through the thrombus occlusion site, and the thrombectomy stent enters the distal end of the intracranial vascular occlusion from the main microcatheter 1. The main microcatheter 1 and auxiliary microcatheter 2 are withdrawn, while the microguidewire is retained. After releasing the thrombectomy stent for 3-5 minutes, the thrombectomy stent is pulled back. In this way, the microguidewire is retained during thrombectomy. Even if the first thrombectomy is unsuccessful, the retained microguidewire can be used to place the double-lumen microcatheter and thrombectomy stent, thereby improving the success rate of the thrombectomy surgery.

[0023] In this embodiment, the inner diameter of the main microcatheter 1 is 0.45-0.55 mm.

[0024] In this embodiment, the inner diameter of the front end of the main microcatheter 1 is 0.50 mm.

[0025] In this embodiment, the outer diameter of the front end of the main microcatheter 1 is 0.6mm-0.7mm, and the outer diameter of the rear end of the main microcatheter 1 is 0.8mm-0.85mm.

[0026] In this embodiment, the outer diameter of the front end of the main microcatheter 1 is 0.66 mm, and the outer diameter of the rear end of the main microcatheter 1 is 0.83 mm.

[0027] In this embodiment, the outer diameter of the auxiliary microcatheter 2 is 0.55mm-0.60mm, and the inner diameter of the auxiliary microcatheter 2 is 0.4mm-0.45mm.

[0028] In this embodiment, the auxiliary microcatheter 2 is 0.57 mm long and has an inner diameter of 0.42 mm.

[0029] In this embodiment, the length of the auxiliary microcatheter 2 is 8mm-10mm.

[0030] In this embodiment, the length of the main microcatheter 1 is 155-160cm.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A dual lumen microcatheter, comprising: The main microcatheter (1) and the auxiliary microcatheter (2) are fixed on the front end side wall of the main microcatheter (1).

2. The dual lumen microcatheter of claim 1, wherein, The inner diameter of the main microcatheter (1) is 0.45-0.55mm.

3. A dual lumen microcatheter according to claim 2, wherein, The inner diameter of the front end of the main microcatheter (1) is 0.50mm.

4. The dual lumen microcatheter of claim 1, wherein, The outer diameter of the front end of the main microcatheter (1) is 0.6mm-0.7mm, and the outer diameter of the rear end of the main microcatheter (1) is 0.8mm-0.85mm.

5. A dual lumen microcatheter according to claim 4, wherein, The outer diameter of the front end of the main microcatheter (1) is 0.66mm, and the outer diameter of the rear end of the main microcatheter (1) is 0.83mm.

6. The dual lumen microcatheter of claim 1, wherein, The outer diameter of the auxiliary microcatheter (2) is 0.55mm-0.60mm, and the inner diameter of the auxiliary microcatheter (2) is 0.4mm-0.45mm.

7. A dual lumen microcatheter as in claim 6, wherein, The outer diameter of the auxiliary microcatheter (2) is 0.57mm, and the inner diameter of the auxiliary microcatheter (2) is 0.42mm.

8. The dual lumen microcatheter of claim 1, wherein, The length of the auxiliary microcatheter (2) is 8mm-10mm.

9. The dual lumen microcatheter of claim 8, wherein, The length of the main microcatheter (1) is 155-160cm.

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