The pneumoperitoneum as a precondition of laparoscopic procedures repr
esents a restriction of the surgeons freedom of movement and causes ra
re but typical complications. In July 1993 we started doing laptroscop
ic cholecystectomy without using a pneumoperitoneum. Under direct visi
on and digital control the retractor blades are introduced into the ab
dominal cavity via minilaparotomy. The retractor is attached to an ele
ctrically powered mechanical arm and raised. The scope is introduced t
hrough the same access and the laparoscopic cholecystectomy can be per
formed using the established technique without instilling a pneumoperi
toneum. Both conventional and laparoscopic surgical instruments were i
ntroduced through valveless trocars and unilimited suction without los
s of gas and exposure is possible. Metabolic and hemodynamic alteratio
ns associated with the intraperitoneal insufflation of carbon dioxide
are omitted. So far we did gasless laparoscopic cholecystectomy in 22
patients. We didn't see any related complications. Four times we had t
o change the surgical procedure. In comparison to the traditional lapa
roscopic cholecystectomy with a CO2-pneumoperitoneum the results of th
e first gasless procedures demonstrate possible advantages.