A medical device for and a method of endoscopic surgery

Claim 1

Douglas O. Olsen-Brian L. Bates-Thomas A. Osborne 1-1-2 proximal end, said first seal having a slit communicating with said fourth passageway, said second seal having an aperture therein positioned adjacent said slit; and a wire guide sized for extending through said second passageway of said dilator. 23. A method of percutaneously placing inner and outer access sheaths into a body cavity, comprising: introducing a wire guide percutaneously into said body cavity through a puncture site; dilating said puncture site with a dilator and said outer sheath placed over said wire guide; positioning said dilator and the distal end of said outer sheath into said body cavity through said dilated puncture site; o a 15 removing said dilator and wire guide from said body Oa a cavity through said outer sheath; and introducing said inner sheath into said body cavity through said outer sheath when positioned in said cavity C through said dilated puncture site. 24. The method of claim 23 wherein the step of dilating o C said puncture site includes wetting a hydrophilic material coating the conically-shaped distal end of said dilator and pushing an end cap at the proximal end of said dilator to O I introduce the conically-shaped distal end of said dilator into said puncture site. The method of claim 24 further comprising insufflating said body cavity through a side port of said inner access sheath. DATED this FIRST day of OCTOBER 1991 Cook Incorporated Patent Attorneys for the Applicant SPRUSON FERGUSON 107 -i //00 *EZH c OIL- 0 0 C ,00 500 000 5 0 0 C 0 0 'A 2 2 JO 2 2 0 0 C 0 0 -3 CS'A 000 C U C C F16 4 1036 F16, 3 114 FIG, 6 102 152 106 /0/ 105 104 103 124 152 131 102 144 PG,