Laminate catheter balloons with additive burst strength and methods for preparation of same
申请人:——
公开号:US20020081406A1
公开(公告)日:2002-06-27
A laminate balloon comprising at least two layers of separately oriented thermoplastic polymer material, which are coextensive over the body of the balloon. The two layers may be made of different polymer materials, including an underlying layer made of a low compliant, high strength polymer, such as PET, and an overlying layer of a softer and more flexible polymer material relative to the first polymer material, such as a polyester-polyether block copolymer. The balloon structures have an additive burst pressure, meaning that they are stronger than a single-layer reference balloon corresponding to the underlying polymer layer. The balloons are characterized by a combination of flexibility and surface softness which allows catheters to track down into lesions relatively easily, puncture resistance, abrasion resistance and refoldability, in addition to low compliance and high burst strength. The balloons may be prepared with generally linear or with stepped compliance profiles. Methods of preparation of such balloons are also disclosed.
一种层压气球,包括至少两层分别取向的热塑性聚合物材料,这两层材料在气球主体上共存。这两层可由不同的聚合物材料制成,包括由低顺应性、高强度聚合物(如 PET)制成的底层,以及由相对于第一层聚合物材料更软、更柔韧的聚合物材料(如聚酯-聚醚嵌段共聚物)制成的上层。球囊结构具有附加爆破压力,这意味着它们比与底层聚合物层相对应的单层参考球囊更强。除了低顺应性和高爆破强度外,这些球囊还具有柔韧性和表面柔软性的特点,这使得导管可以相对容易地追踪到病变部位、抗穿刺性、耐磨性和可再折叠性。球囊可按一般线性或阶梯顺应性曲线制备。此外,还公开了此类球囊的制备方法。