| 摘要 |
This invention discloses disposable infusion delivery systems, in each of which fluid is drawn into a receiving and retaining housing and a piston is slideable in said housing. As the piston is moved away from a discharge end of the housing, at least one elastomeric member is stretched, with the stored fluid ahead of said piston discharged from said housing by the force developed by said stretched elastomeric member. This stored fluid provides a continuous flow of fluid to a patient. There are three arrangements shown. The first enables additive drugs to be infused into a fluid stream without purging. The second shows a syringe adapted to provide the disposable infusion device, and the third provides a fluid stream to and through a pressure transducer, enabling monitoring of blood pulses with minimum distortion.
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