What anesthetic agents cause malignant hyperthermia?
Anesthetic agents, which may trigger MH in susceptible individuals, are the depolarizing muscle relaxant, succinyl choline and all the volatile anesthetic gasses. Nitrous oxide, intravenous induction agents, benzodiazepines, opioids, and the non-depolarizing relaxants do not trigger MH.
What is the treatment for malignant hyperthermia?
Immediate treatment of malignant hyperthermia includes: Medication. A drug called dantrolene (Dantrium, Ryanodex, Revonto) is used to treat the reaction by stopping the release of calcium into the muscle. Other medications may be given to correct your body’s metabolic imbalance and treat complications.
Do local anesthetics trigger malignant hyperthermia?
Malignant hyperthermia is a genetically transmitted complication of general or local anesthesia, with a high mortality rate.
How long after surgery can malignant hyperthermia occur?
Although the initial clinical signs of MH typically occur within one hour of anesthesia induction, the onset of MH can occur any time during the administration of triggering agents.
Is malignant hyperthermia fatal?
Malignant hyperthermia is a severe reaction to certain drugs used for anesthesia. This severe reaction typically includes a dangerously high body temperature, rigid muscles or spasms, a rapid heart rate, and other symptoms. Without prompt treatment, the complications caused by malignant hyperthermia can be fatal.
What are the side effects of dantrolene?
Drowsiness, dizziness, weakness, tiredness, nausea, and diarrhea may occur as your body adjusts to this medication and usually lessen after several days. Headache, constipation, trouble speaking, and drooling may also occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
What anesthesia is used for MH?
Anaesthesia can be safely performed with i.v. anaesthetics, nitrous oxide, nondepolarizing muscle relaxants, local anaesthetics as well as xenon.
What is malignant hyperthermia and how is it treated?
Malignant hyperthermia is a severe reaction to particular anesthetic drugs that are often used during surgery and other invasive procedures.
Which anesthetic drugs do not trigger malignant hyperthermia?
Other anesthetic drugs do not trigger malignant hyperthermia. These include local anesthetics (lidocaine, bupivacaine, mepivacaine), opiates (morphine, fentanyl), ketamine, barbiturates, nitrous oxide, propofol, etomidate, and benzodiazepines.
What is awake malignant hyperthermia (AMH)?
Affected individuals may be at increased risk for “awake” malignant hyperthermia, in which the severe reaction occurs in response to physical activity, often while sick, rather than in reaction to exposure to a triggering drug.
Do you know if you have hyperthermia after surgery?
Affected individuals may never know they have the condition unless they have a severe reaction to anesthesia during a surgical procedure or they undergo testing (for instance, if susceptibility is suspected because a family member had a severe reaction). Malignant hyperthermia may not occur every time anesthesia is used.