SPRING HYPODERMIC NEEDLE

摘要

A needle that consists of two pieces, generally the second piece has two cylindrical parallel hollows; one hollow is much bigger than the other, the bigger hollow is for fluid entrance and the smaller hollow contains the first piece shaft; the first piece has a spring at the distal portion with an bicolored indicator for the movement of the first piece, and at the proximal portion it has a cylindrical shaft that moves forward and backward inside the smaller hollow of the second piece. When the hypodermic needle tip touches the skin or being inside a tissue the spring will be squeezed and the first piece will be situated backward in its primary position. Just when the tip of the needle enters any cavity or any vessel the spring will be freed and pushes the first piece forward with the change of the color of the bicolored indicator.

主权项

1. A needle that immediately detects its entrance in a cavity or a blood vessel, comprising two pieces: the first piece is the smaller piece that has four parts; bi-color indicator part, spring part, shaft part and tip part. The second piece is the larger piece that has two cylindrical parallel hollows; one hollow is much bigger than the other, the bigger hollow is for fluid entrance and passage, and the smaller hollow contains the first piece shaft, and in continuation with the smaller hollow is the spring container that contains the spring part of the small piece, and in continuation with the spring container is the indicator part that has a hole to see the color inside.