Respiratory effects of 'lissive" anaesthesia using gallamine

Area of Science:

• Anesthesiology
• Pharmacology

Background:

• Lissive anesthesia, utilizing minimal non-depolarizing muscle relaxants with nitrous oxide, oxygen, and anesthetic vapor, is common for minor procedures.
• Understanding the impact of specific muscle relaxants on patient physiology during such anesthesia is crucial for safety.

Purpose of the Study:

• To evaluate the effects of intravenous gallamine triethiodide on the blood-gas status of patients undergoing lissive anesthesia.
• To compare these effects against a control group not receiving the muscle relaxant.

Main Methods:

• Twenty patients received general anesthesia with oxygen, nitrous oxide, and halothane, following pethidine and atropine premedication, plus 40 mg intravenous gallamine triethiodide.
• A control group of 10 patients received identical anesthesia without the muscle relaxant.
• Blood-gas status, including arterial carbon dioxide tension, was monitored in both groups.

Main Results:

• All patients in both the gallamine and control groups developed respiratory acidaemia.
• A significantly greater increase in mean arterial carbon dioxide tension was observed in the gallamine group.
• Hypoxia and metabolic acidaemia were not significant, except in one obese patient in the gallamine group.

Conclusions:

• Gallamine triethiodide administration during lissive anesthesia can potentiate respiratory acidaemia and increase carbon dioxide retention.
• The technique appears generally safe regarding hypoxia and metabolic disturbances, barring specific patient factors like obesity.
• Careful monitoring of ventilation is advised when using gallamine in this anesthetic context.