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The aim of this study is to verify that 10 % of N 2 O in CO 2 sufficiently reduces pain to permit laparoscopy under local anesthesia. In nine patients undergoing laparoscopy under local anesthesia for tubal sterilization, a mixture of 86 % of CO 2 , 10 % of N 2 O, and 4 % of oxygen (the Gas Mixture) was used for the pneumoperitoneum. For CO2,...
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