Consequences of intranasal awakening
Consequences of intranasal awakening: "I feel inhuman pain, I hear talk, but ..."
In 2007, the screen came thriller "Ankoke" (Awake) American director Joby Harold. His hero, being anesthetized during an operation on the open heart, suddenly wakes up, but is unable to attract the attention of doctors.
The risk of waking up during anesthesia does exist. This fact once again confirmed the large-scale joint study of British and Irish physicians. The mechanism of action of anesthetics has not been thoroughly studied, and they, like most other drugs, still require further development. Therefore, problems with anesthesia continue to occur.
Complications of anesthesia
The situation in which the patient regains consciousness during the operation, in other words, when the patient does not sleep on the operation, is an intranasal awakening.
The possibility of waking up during anesthesia is due to the fact that for the general anesthesia three different drugs are administered to the patient's body: one of them lulls, the other relaxes the muscles, the third "turns off" the pain.
When there is a lack of a sleeping pill, it is possible to recover at the most inopportune moment, to hear the conversations of surgeons and how to be frightened. When in an anesthetic "cocktail" sufficient concentration of muscle relaxant - a substance temporarily paralyzing the body, a person is not able to move and can not even open his eyes to give a sign to doctors.
If, for some reason, the amount of anesthetic is reduced in an anesthetic mixture, a person feels everything that happens to him and experiences terrible agony. Fortunately, according to researchers, such complications of anesthesia are extremely rare.
The Association of Anaesthesiologists of Great Britain and Ireland published the results of its three-year observation of cases of anesthesia in 3 million people. The probability of recovering from sleep during anesthesia was 1 case per 19 thousand. Other studies have demonstrated that this figure can be significantly higher - 1 case per 500 operations.
It turned out that most often during the anesthesia women awaken during the execution of cesarean section, as well as people with operations on the heart and thorax. Increased risk is for obese patients and those who have trouble breathing right at the beginning of anesthesia.
Cases of intranasal awakening
" I feel inhuman pain, I feel the doctor doing something in my stomach, I hear their conversations, but I can not move, I can not open my eyes, I can not breathe! Pain infernal! And I do not know how to let them know that I'm not sleeping, that I will suffocate now. Panic! ", The 32-year-old patient who underwent Cesarean section surgery described her experience of intranasic awakening.
" I thought I was going to die ," said Sandra, who regained consciousness, but could not move during the dental surgery when she was 12 years old. " It seemed that nothing would help, as if the doctor had removed everything except my soul ."
June Carson survived a cardiac arrest during an operation. The anesthesiologist did not calculate the dose, June could not move or make sounds, but she felt every painful minute of the operation.
" Feeling a knife cutting my stomach, I thought I would die right away. It's hard to describe the pain, but there was a feeling that they were torturing me , "she said. 15 minutes after the stress, her heart stopped. Fortunately, the heart was able to start again, and she woke up in 2 hours.
A patient from the UK survived the operation, during which he was cut off his leg to drill a bone. He was given anesthesia. But he remained conscious with a pipe in his throat without the ability to move. He tried to move his toes with his fingers, which the nurse noticed, but the doctor convinced her that it was only reflexes. The patient became ill, and his breathing stopped, but a fan was connected, which performed the function of breathing. After the operation, he sued and received 15,000 pounds in compensation.
In 1990, Rachel Benmayor was hospitalized on the ninth month of pregnancy. It was decided to conduct cesarean section under general anesthesia. Rachel remembers that she was taken to the operating theater. She remembers the mask, the gas. But, when the surgeon made the first incision, she woke up. " I remember how I was brought to the operating table, " Rachel says. - I remember the injection in the hand, I remember how the gas went. Then everything went dark. Then came the realization of pain. I heard a sound. Rhythmic sound, ticking or tapping. And pain. I remember feeling terrible pressure on my stomach, like a truck moving back and forth . "
Anaesthesiologists still can not be 100% sure that the patient is in an artificial coma during the operation. But science does not stand still. Scientists from the Massachusetts Hospital describe the results of a study that can help doctors accurately track the patients' condition, thereby further reducing the risk of their awakening during surgery.
Dr. Patrick Purdon and colleagues conducted brain activity studies in healthy volunteer subjects who agreed to be exposed to the anesthetic of propofol, one of the most commonly used in modern operations, and to lose consciousness for two hours.
At the same time throughout the experiment they registered brain activity - an electroencephalogram (EEG). As a result, scientists received EEG samples, typical of immersion in anesthesia, to different stages of its depth and return to clear consciousness.
The ratio of EEG rhythms, the various dominant frequencies of each of them, as well as the distribution of rhythms over the scalp, are specific for wakefulness, sleep, and various altered or pathological states of consciousness. Dr. Purdon emphasizes that now, thanks to his research, it is easy to determine whether the patient is really under anesthesia or is beginning to wake up.