I hope that is helpful.
the operation literally muscle relaxants paralyzes
you temporary at the end of operation they reverse it but all them you are
unconscious and pain free
There are many way anesthesia team monitor the depth of unconsiousness and
paralysis . public they should know in extremely rare cases people have
experienced awareness this is very rare always human error or problem with
the potency of drugs again it is a rare event.
circumstances. For some surgeries, like knee arthroscopy and hysteroscopy,
the patient may be asleep but no muscle relaxants are needed so the patient
is not paralyzed. Other more invasive surgeries, like laparoscopy and
exploratory laparotomy do require the use of muscle relaxants to insure a
motionless operative field for safe surgical technique. Anesthesiologists
administer drugs and monitor patients to insure that they are not conscious
during both kinds of general anesthesia. Muscle relaxants are reversed at
the end of surgery, so both groups of surgical patients have full motor
strength when they awaken from general anesthesia. Anesthesiologists are
careful to insure patient unconsciousness (along with adequate oxygenation,
ventilation, and hemodynamic stability) when muscle relaxants are used, so
that no patient should ever experience any wakefulness when paralyzed
This has been a standard practice in anesthesia for many years and is generally considered part of the reason anesthesia is so much safer than in years gone by.
Muscle relaxants may also be given intraoperatively to improve surgical access such as relaxing abdominal muscles during bowl surgery. The level of neuromuscular blockade is monitored using a neuromuscular stimulator, and observing the degree and strength of muscles, generally those of the hand, to electrical stimulation. Additional, a muscle relaxant reversal agent at the end of the procedure.
Despite anecdotal stories, it is extremely rare for patients to have any intraoperative awareness of their surgery, muscle blockade, etc., as anesthesia is induced and maintained using a combination of drugs including those specifically chosen for their amnesic and pain relieving properties. Although still quite rare, most case reports of intraoperative awareness occur either during emergency caesarean sections under general anesthesia, where the Anesthesiologist is trying to limit the amount of anesthetic agent received by the baby prior to delivery, or during emergency trauma surgery, where the Anesthesiologist must balance inducing anesthesia and amnesia with the effects of anesthetic agents on blood pressure in patients with severe trauma and blood loss.
Steven Dain MD, FRCPC
anesthetic. It may facilitate artificial breathing or be beneficial in
some procedures, such as chest or head surgery. Other times, muscle
paralysis is not used and in some cases, may be catastrophic.