Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-02-01
1994-12-20
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604274, 128754, 606185, A61M 5178, A61B 1000
Patent
active
053742524
ABSTRACT:
A safety pneumoneedle through which the abdomen can be inflated with fluid such as insufflating gas is described. The pneumoneedle comprises a housing having front and rear ends, exterior surfaces adapted to be manually grasped, inner surfaces defining an elongate cavity having a fluid passageway portion. The pneumoneedle includes a non-removable cannula having a proximal end sealingly and fixedly attached to the housing, and a sharpened distal end adapted to pierce tissue. A protector assembly is present which has a closed blunt distal end, a first abutment end surface, and a camming surface. The protector assembly is movable relative to the cannula between a protecting position with the blunt distal end of the protector extending beyond the sharp distal end of the cannula to restrict engagement between tissue and the sharp distal end of the cannula, and a retracted position with portions of the sharp distal end of the cannula extending beyond the blunt distal end of the protector to afford puncture of tissue. The pneumoneedle also includes a latching and release mechanism for positively locking the protector in the protecting position after the cannula has pierced tissue and for releasing the protector after it has been locked in the protecting position.
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Banks Thomas F.
Mittelstadt William A.
Green Randall L.
Griswold Gary L.
Hohenshell Jeffrey J.
Jones Mary Beth O.
Kirn Walter N.
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