Water intoxication and oxytocin infusion

Area of Science:

• Endocrinology
• Nephrology
• Obstetrics

Background:

• Oxytocin is a hormone commonly used to induce labor and manage postpartum bleeding.
• High doses of oxytocin can lead to antidiuretic effects, potentially causing water retention.
• Water intoxication is a rare but serious complication associated with excessive fluid intake and impaired water excretion.

Purpose of the Study:

• To report cases of water intoxication following high-dose oxytocin infusions.
• To investigate the effects of high-dose oxytocin on plasma sodium levels and urine flow.
• To correlate these findings with existing literature on oxytocin-induced hyponatremia.

Main Methods:

• Case report presentation of two patients with water intoxication post-oxytocin.
• Prospective study of plasma sodium and urine flow in two additional patients receiving high-dose oxytocin.
• Analysis and comparison of findings with previously published data.

Main Results:

• Two patients developed significant water intoxication, characterized by hyponatremia and neurological symptoms.
• In the studied patients, high-dose oxytocin infusions were associated with decreased plasma sodium levels.
• Urine flow was observed to be reduced in patients receiving high-dose oxytocin, indicating impaired water excretion.

Conclusions:

• High-dose oxytocin infusions pose a risk of water intoxication due to their antidiuretic properties.
• Monitoring of fluid balance, electrolytes (especially sodium), and urine output is crucial in patients receiving high-dose oxytocin.
• These findings underscore the importance of cautious administration and vigilant monitoring during oxytocin therapy to prevent adverse events.