In fact, many patients may not even be aware that their doctor has used anesthetic gases because these are often administered only after initial anesthesia has been established by intravenous means.
क्योंकि इससे पहले उनकी नसों द्वारा चढ़ाए गए एनस्थिज़िया से उन्हें बेहोश किया जाता है ।