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Embolism microcatheter

A microcatheter and embolization technology, which is applied to catheters, drug devices, and other medical devices, etc., can solve the problem of poor bonding ability between the inner layer and the outer layer of the microcatheter, difficult to control the direction of travel of the microcatheter, and unable to take into account the pushability and flexibility at the same time. It can improve the passability and flexibility, improve the passability, flexibility and push performance.

Active Publication Date: 2019-12-06
SHANGHAI SHENQI MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the deficiencies of the prior art, the present invention provides an embolic microcatheter, which solves the problem that the existing microcatheter has poor bonding ability between the inner layer and the outer layer, cannot take into account good pushability, flexibility and passability at the same time, and the microcatheter Difficult to control the direction of catheter travel

Method used

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Examples

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Embodiment 1

[0046] refer to Figure 1 to Figure 5 As shown, the present invention provides an embolic microcatheter, which includes a tube base 13, a stress relief tube 12 and a tube body 11. The tube base 13 of this product is a part in the shape of a Luer connector, which is convenient to connect with the tube base 13; see figure 1 , the proximal end of the tubular body 11 is connected to the tube base 13, and the distal end of the tubular body 11 is provided with a marking ring 14; The proximal end of the stress relief tube 12 is connected to the tube base 13; the stress relief tube 12 of this product is sleeved on the tube base 13 and connected to the tube body 11 in the form of an undercut (the stress relief tube 12 is inserted from the distal end of the microcatheter) It can also effectively release the stress at the joint between the tube body 11 and the base 13. At the same time, it can also relieve and diffuse the stress generated by the micro-catheter during the advancement proc...

Embodiment 2

[0063] In the first embodiment of the present invention, the controllability of the distal end of the microcatheter is poor, especially when the microcatheter enters a tortuous blood vessel, it is difficult to control the direction of travel of the distal end of the microcatheter, so the following improvements are proposed on the basis of the first embodiment Program.

[0064] refer to Figure 7 As shown, the second preferred embodiment of the present invention provides a microcatheter for embolization, which is different from the first embodiment in that a shaft 75 is provided in the diameter direction of the distal port of the microcatheter, and a shaft 75 is provided on it. And the adjusting plate 74 that can rotate, the first magnet 76 and the second magnet 77 are symmetrically arranged on the two sides of this adjusting plate 74, and the electromagnetic block 73 close to the shaft rod 75 is provided on the inner wall of the port at the far end of the microcatheter. Also ...

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Abstract

The invention provides an embolism microcatheter, which comprises a catheter seat, a de-stressed tube and a catheter body. The near end of the catheter body is connected with the catheter seat, and the far end of the catheter body is provided with a mark ring; the de-stressed tube is arranged outside the catheter body in a sleeving mode, the length of the de-stressed tube is smaller than the length of the catheter body, and the near end of the de-stressed tube is connected with the catheter seat; and the catheter body is sequentially divided into an outer layer, a woven layer, a first combinedlayer, a second combined layer and an inner layer from outside to inside, and the outer layer comprises a first near section, a second near section, a transition section and a far section which are mutually connected in sequence in the direction of the far end of the catheter body. The two sets of combined layers are additionally arranged between the inner layer and the outer layer so that the inner layer and the outer layer can be combined better, the structure is more stable, and thus the pushing property, flexibility and the passing ability of the microcatheter are improved greatly.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to an embolic microcatheter. Background technique [0002] Liver cancer is one of the common malignant tumors in my country. According to statistics in the 1990s, the annual mortality rate of liver cancer in my country was 20.37 / 100,000, ranking second in the death sequence of malignant tumors. [0003] At present, transarterial embolization and carotid chemoembolization (TACE) are usually used in the treatment of liver cancer. Among them, superselective TACE mainly embolizes the blood supply artery of the tumor, blocks the blood supply of the tumor, causes tumor ischemia and hypoxia, and inhibits tumor growth. The purpose of promoting tumor cell necrosis and apoptosis. [0004] During the operation, the femoral artery at the root of the patient’s thigh is punctured, and a fine microcatheter is inserted. Under the perspective guidance of the digital subtraction angiograp...

Claims

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Application Information

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IPC IPC(8): A61M25/00
CPCA61M25/0023A61M25/0045A61M2205/02A61M2205/32
Inventor 王森宋睿周国磊胡帅领王海兰
Owner SHANGHAI SHENQI MEDICAL TECH CO LTD
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