Veress needle and cannula assembly

Details Veress needle and cannula assembly Veress needle and cannula assembly

1995-04-12

1997-09-23

Hafer, Robert A.

Surgery

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

Treating material introduced into or removed from body...

604158, 604256, A61M 5178

Patent

active

056698836

ABSTRACT:
A Veress needle and cannula assembly includes a stainless steel cannula assembly with a cannula 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 and the Veress needle is insertable through the valve assembly. Where the cannula and Veress needle are not closely fitted, a molded transition collar 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 for aiding insertion of the cannula assembly into the body of a patient. The cannula valve assembly preferably includes a female luer lock connector. The Veress needle preferably includes a handle with a rotatable male luer lock coupler which engages the female luer lock connector on the cannula valve assembly when the Veress needle is inserted into the cannula assembly.

REFERENCES:
patent: 4430081 (1984-02-01), Timmermans
patent: 4791937 (1988-12-01), Wang
patent: 4869717 (1989-09-01), Adair
patent: 5334159 (1994-08-01), Turkel
patent: 5415666 (1995-05-01), Gourlay et al.

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