Patent ID: 6193692
Filing Date: 2001-02-27
Classification: A61B

Abstract:
A verres needle assembly for use in an insufflating procedure, comprising:an outer sheath having an inner bore including means on a distal end of the outer sheath for making an outer incision so that the outer sheath extends into a body cavity;a stylet subassembly attachable to the outer sheath at a proximal end including an inner projection extending through the outer sheath, the inner projection being shiftable relative to the outer sheath to protrude through the distal end of the outer sheath to allow air to be injected into the body cavity though an open passage within the outer sheath, the stylet subassembly being detachable from the outer sheath at the proximal end of the outer sheath; andan adapter attachable to the outer sheath at the proximal end thereof, after removal of the stylet subassembly, the adapter being attachable to a source of gas, at a pressure higher than pressure in the body cavity, and having an internal bore larger than the open passage within the outer sheath when the stylet subassembly is attached to the outer sheath, and at least approximately the same size as the outer sheath inner bore so that gas can be injected into the body cavity through the outer sheath without flow restrictions between the proximal end of the adapter and the distal end of the outer sheath, the adaptor including a stop cock positionable with an opening in the stop cock in alignment with the inner bore of the outer sheath and the internal bore of the adapter to form a passage having a cross sectional area at least approximately the same as the cross sectional area of the outer sheath inner bore for the introduction of relatively higher pressure gas into a body cavity.