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.
وفي الواقع ،‏ قد لا يدرك مرضى كثيرون ان طبيبهم استعمل غازات مخدِّرة لأنها غالبا ما تُعطى فقط بعد التخدير الاولي بالحقن الوريدي .‏