Thoracentesis sheath catheter assembly

Details Thoracentesis sheath catheter assembly Thoracentesis sheath catheter assembly

1992-09-23

1994-04-05

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604169, 604256, 2511498, A61M 500, A61M 2500, A61M 5178, A61M 514

Patent

active

053000463

ABSTRACT:
A thoracentesis sheath catheter assembly includes a catheter connected to a valve body. The valve body is provided with a throughbore coaxial to the catheter for receiving a thoracentesis needle therethrough and a drainage bore in fluid communication with the first throughbore. The valve body is constructed as a first cylindrical portion which is connected to the catheter and a second cylindrical portion of larger inner diameter which is joined to the first cylindrical portion by a tapered inner wall. The second cylindrical portion contains a valve comprising a blocking ball and a spring biased plunger having a throughbore coaxial to the catheter, and is closed with a cap having a central hole and/or a gasket for sealingly receiving the thoracentesis needle. A thoracentesis needle extends through the hole of the cap, the gasket, the plunger, the first cylindrical portion and into and through the catheter. With the thoracentesis needle in place, communication between the throughbore and the drainage bore is blocked and a flow path is established through the needle. When the needle is removed, the throughbore is automatically obstructed by movement of the ball by the plunger along the tapered inner wall. However, a second fluid path is automatically established from the throughbore to the drainage bore.

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