| 摘要 |
<p>An intravascular medical catheter is provided herein. The medical catheter includes a balloon made from a specific, small group of polyurethane materials. The balloon is formed under rigid manufacturing parameters to obtain the desired compliance or stress/strain characteristics, burst strength, and flexibility. The polyurethane material preferably has a hardness prior to forming of the balloon of between approximately 50D to 65D. The polyurethane material includes (i) a hard segment derived from a diisocyanate and a short-chain diol and (ii) a soft segment derived from a polymeric glycol having an average molecular weight of between approximately 500-5000. When the polyurethane material is manufactured within the parameters outlined herein, the resulting balloon exhibits superior characteristics, including relatively high burst strength, relatively low compliance, and good flexibility.</p> |
