| 摘要 |
A multi-pressure injector device, having utility as an angiographic syringe or as an inflation device for balloon angioplasty, wherein an inner barrel/plunger is reposed slidably reposed in an outer barrel, with a second plunger slidably reposed in the inner barrel/plunger, and with the inner barrel/plunger and outer barrel being selectively longitudinally lockable relative to one another along the length of travel of the inner barrel/plunger in the outer barrel. A quick-lock/release structure is disclosed, which is particularly suitable for use with inflation devices for balloon angioplasty. In one aspect, the injector comprises a rotatable connector which is mounted at a distal end of the injector, and includes a distal threaded neck portion and a proximal collar portion of greater diameter than the injector barrel. Such rotatable connector construction facilitates ease of use in attaching the injector to complementary matable structure of catheters, manifolds, and other fluid delivery means.
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