| 摘要 |
An over-the-needle type IV catheter system (10) comprising a vented "closed hub" catheter assembly (12) having a self-sealing injection port (40), a check valve (38) operatively associated with the IV line, and a distally-situated flash chamber (74). Push flanges (22) on the top and sides of the catheter assembly (12) may be used to aid insertion, and may be rotated on the catheter housing (28) as desired. A safety tube asssembly (16) having a triggeractuated spring-biased needle retracting mechanism (54) and a telescoping safety guard (26) permit the operator to enclose the needle (18) after catheterization using one hand. The coupling for the IV line is oriented in generally the same direction as the catheter tube (30), so that looping the IV line is unnecessary.
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