Balloon microcatheter for treating cerebrovascular stenosis
A technology of cerebrovascular stenosis and balloon catheter, which is applied in the direction of balloon catheter, stent, surgery, etc., to reduce the possibility and the number of exchanges
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Embodiment 1
[0021] Embodiment 1: the mode of balloon expansion stent, such as Figure 1 to Figure 6 As shown, a new type of balloon microcatheter that combines a balloon catheter and a microcatheter, including a balloon catheter 1 forming an outer cavity 13, is made of a polymer material pebax2, a platinum-iridium alloy or a stainless steel mesh tube 3 and a polymer The microcatheter made of polytetrafluoroethylene 4 has a handle 5 with two independent cavities. The two independent cavities are not connected, but connected to the inner cavity 14 and the outer cavity 13 respectively. Two balloon imaging rings 6, tip imaging ring 7 and balloon 8. The balloon catheter 1 and the outer surface of the balloon are covered with a hydrophilic coating 10 . The balloon 8 of the balloon microcatheter enters the stenosis 11 of the blood vessel, the hydrophilic coating 10 can improve the lubrication performance of the outer surface of the catheter, and the balloon developing ring 6 and the tip develop...
Embodiment 2
[0022] Embodiment 2: The expansion mode of the self-expanding stent, such as Figure 7 As shown, the self-expandable stent 12 is not stretched in the microcatheter, and is in the original vascular stenosis 11; as Figure 8 As shown, the self-expandable stent 12 is automatically stretched and fixed at the original vascular stenosis 11 . The process of using the self-expandable stent 12 to expand and treat cerebrovascular stenosis is similar to the process of using the balloon expandable stent 9 to treat cerebrovascular stenosis. The difference is that the expansion of the balloon-expandable stent 9 needs to rely on the external pressure control device 15 to pressurize the balloon in the stent, while the self-expandable stent 12 can be withdrawn with the short distance of the balloon microcatheter, and can The microcatheter on its outside expands automatically at the same time, without relying on the external pressure control device 15 to pressurize the balloon in the stent. T...
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