It turns out that 1 in 10 people keeps consciousness even if they receive general anesthesia

In modern times, partial anesthesia and general anesthesia are given during surgery, so you do not feel much pain during surgery. However, a study conducted by a research team at the University of Sydney found that 1 in 10 people remained conscious even during general anesthesia. It has also been shown that half of those who remain conscious are in pain and forget the pain after the anesthesia is released.

Connected consciousness after tracheal intubation in young adults: an international multicentre cohort study --British Journal of Anaesthesia
https://doi.org/10.1016/j.bja.2022.04.010

During general anaesthesia 1 in 10 people may be conscious following intubation --The University of Sydney
https://www.sydney.edu.au/news-opinion/news/2022/05/24/during-general-anaesthesia-1-in-10-people-may-be-conscious-follo.html

General anesthesia is widely used because it has the effect of relieving pain during surgery and suppressing the movement of patients. However, the mechanism of general anesthesia has not been elucidated even in modern times, and the details of the presence or absence of consciousness during general anesthesia are unknown.

Some patients under general anesthesia report the horrifying experience of 'regaining consciousness and feeling pain but unable to move.' Experiments conducted at the University of Wisconsin have also shown that 4.6% of patients under general anesthesia responded to instructions during anesthesia.

One in 20 people may be awake during surgery, and in some cases they may feel unbearable pain just by forgetting-- GIGAZINE

A research team at the University of Sydney, who reported on awareness during general anesthesia, said to 338 patients aged 18 to 40 years, 'hold your hand once if you can understand the instructions during general anesthesia and twice if you have pain. I asked for it. ' As a result of the experiment, 11% of the patients held their hands in response to the instructions. In addition, half of 11% of patients reported that they held their hands multiple times and felt pain.

Most of the patients who held their hands forgot the instructions from the research team and their own responses when recovering from anesthesia, but one patient reported that he vividly remembered the experience during surgery. And that. It was also shown that female patients were three times more likely to respond to instructions than males.

'The results of this study emphasize the importance of knowing how people respond to anesthesia. Biology that affects susceptibility to anesthesia,' said Professor Robert Sanders, a member of the research team. There is an urgent need to study gender differences, especially gender differences. '