Thoracentesis needle assembly utilizing check valve

Details Thoracentesis needle assembly utilizing check valve Thoracentesis needle assembly utilizing check valve

1992-03-30

1994-08-02

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604247, 604264, 604272, 606185, A61M 5178

Patent

active

053341597

ABSTRACT:
A thoracentesis needle assembly is provided and generally comprises a longitudinally extending hollow needle which is sharp at its distal end, a longitudinally extending hollow probe which extends through the hollow needle and has a blunt distal end with an opening, a spring which is coupled to the probe and which resiliently biases the probe forward with respect to the hollow needle such that the blunt distal end of the probe extends past the sharp distal end of the needle, a hollow housing which is fixed to the needle and which houses the spring and permits relative movement of the probe relative to the housing, a hollow luer adapter with its distal end coupled to the housing and its proximal end having a luer mating means, the probe, housing and luer adapter providing a flow path for fluid, and an automatic check valve in the fluid flow path, where the automatic check valve permits flow of fluid in a proximal direction, but prevents flow of fluid in a distal direction. The provided thoracentesis needle assembly substantially eliminates lung puncture, and automatically prevents air leakage into the pleural cavity during thoracentesis.

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