VERESS NEEDLE AND CANNULA ASSEMBLY

摘要

A Veress needle (50) and cannula assembly (10) includes a stainless steel cannula assembly (10) with a cannula (12) having an outer diameter of approximately 4 mm and a Veress needle assembly having a Veress needle with an outer diameter of approximately 3 mm. The cannula assembly includes a proximal valve assembly (14) and the Veress needle is insertable through the valve assembly (14). Where the cannula and Veress needle are not closely fitted, a molded transition collar (74) on the Veress needle seals the annular space between the interior of the cannula and the exterior of the Veress needle and is provided with sharp distal edges (80a, 82a, 84a) for aiding insertion of the cannula assembly into the body of a patient. The cannula valve assembly preferably includes a female luer lock connector (36). The Veress needle preferably includes a handle (56) with a rotatable male luer lock coupler (72) which engages the female luer lock connector on the cannula valve assembly when the Veress needle is inserted into the cannula assembly.