Methyoxuflurane and serum fluoride concentrations during anaesthesia and postoperative renal function

Area of Science:

• Anesthesiology
• Nephrology
• Pharmacology

Background:

• Methoxyflurane was previously associated with potential renal toxicity due to fluoride ion release.
• Monitoring renal function and methoxyflurane/fluoride levels is crucial for patient safety.

Purpose of the Study:

• To evaluate the renal effects of methoxyflurane anesthesia in gynaecological patients undergoing hysterectomy.
• To measure arterial blood and urine concentrations of methoxyflurane and fluoride ions.
• To assess renal function through various laboratory and clinical parameters.

Main Methods:

• Arterial blood and urine samples were collected from 20 patients during and after hysterectomy.
• Renal function was assessed using BUN, creatinine, osmolality, and electrolytes.
• Fluid balance, methoxyflurane, and fluoride ion levels were monitored postoperatively.

Main Results:

• No clinical or laboratory evidence of renal dysfunction was observed in any patient.
• Postoperative fluoride ion levels were below previously reported thresholds associated with renal toxicity.
• Arterial methoxyflurane concentrations were lower than previously documented.

Conclusions:

• Methoxyflurane anesthesia appears safe regarding renal function in gynaecological patients undergoing hysterectomy.
• The observed low fluoride ion levels suggest a reduced risk of nephrotoxicity.
• Further research may confirm the safety profile of methoxyflurane in specific surgical contexts.