| 摘要 |
An intervenous catheter device having a needle cannula fixed to a slidable piston. The slidable piston is held within the elongated hollow barrel of said intervenous catheter device by a compressed spring and a latch means. When said latch means is disengaged with said slidable piston fixed to said needle cannula, said slidable piston and said needle cannula are thrust into said elongated hollow barrel of said intervenous catheter device by said spring, said spring further holds said needle cannula fixed to said slidable piston within said elongated hollow barrel and is further prevented from being pushed out of said elongated hollow barrel by a rim in said elongated hollow barrel thus preventing any accidental injection of bacteria, virus or other undesirable material into others. The disengagement of said latch means with said slidable piston is accomplished with only one and the same hand that is used to inject the needle cannula into a body or into a vein inside of said body.
|
