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Anaesthesia and progressive muscular dystrophy
Abstract:
The presentation and features of Duchenne's progressive muscular dystrophy (Duchenne's PMD) are described and the increased risks associated with anaesthesia are considered. Hazards associated with induction of anaesthesia and immediate postoperative recovery have been stressed in recent case reports, and these are summarized. Features of a hyperpyrexia-like response including cardiac arrest, increased serum creatine phosphokinase concentration, myoglobinuria and metabolic acidosis following suxamethonium or halothane, or both, have been described in patients with Duchenne's PMD. Subsequent in vitro muscle tests have suggested that it is possible that a malignant hyperpyrexia response to general anaesthesia may occur. Six children known to have Duchenne's PMD who developed delayed respiratory insufficiency following anaesthesia and required controlled pulmonary ventilation are reported. In five of the children, cardiac arrest occurred despite apparently adequate respiratory support. Suxamethonium was common to the anaesthetic received by all six patients. In one of these patients subsequent anaesthetics, without suxamethonium, were uneventful and delayed muscle weakness did not occur.
Insights
Patients with Duchenne
Area of Science:
- Anesthesiology
- Neurology
- Pediatrics
Background:
- Duchenne's progressive muscular dystrophy (Duchenne's PMD) is a severe genetic disorder.
- Anesthesia poses significant risks for patients with Duchenne's PMD.
Observation:
- Recent case reports highlight anesthesia-related hazards during induction and postoperative recovery.
- Patients with Duchenne's PMD may exhibit hyperpyrexia-like responses, including cardiac arrest, elevated creatine phosphokinase, myoglobinuria, and metabolic acidosis after suxamethonium or halothane.
- In vitro muscle tests suggest a potential for malignant hyperpyrexia during general anesthesia.
Findings:
- Six children with Duchenne's PMD experienced delayed respiratory insufficiency post-anesthesia, necessitating mechanical ventilation.
- Five of these children suffered cardiac arrest despite adequate respiratory support.
- Suxamethonium was a common factor in the anesthesia received by all six patients.
Implications:
- These findings underscore the critical need for careful anesthetic management in Duchenne's PMD patients.
- Avoiding suxamethonium may mitigate risks, as evidenced by one patient's uneventful subsequent anesthetics without it.
- Further research into anesthetic protocols for Duchenne's PMD is warranted to improve patient safety and outcomes.