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We thank the writer for his interest in our article. We agree with his comments. However, we would like to submit the following. Pelvic laparoscopy is a short surgical procedure. Steep trendelenburg position is not required and only 3–5 litres of gas is used to induce pneumoperitoneum. So these two factors do not cause much cardiorespiratory embarassment. We have carefully monitored these patients under ketamine anaesthesia using pulse oximeter and observed that incidence of oxygen desaturation and hypoxaemia is very low.
We have used pulse oximeter in this study with an aim to evaluate effect of ketamine anaesthesia on Sa O2 while patients are breathing air spontaneously. The purpose of this study is not to recommend that pulse oximeter is mandatory during ketamine anaesthesia for pelvic laparoscopy. We also strongly recommend oxygen supplement to all these patients as concluded in our article.