Large versus Small Dose Magnesium Sulfate Infusion in Tetanus

Area of Science:

• Critical Care Medicine
• Neurology
• Pharmacology

Background:

• Guidelines for using magnesium sulfate in tetanus treatment are lacking.
• Tetanus spasms require effective management, often involving adjunctive therapies.

Purpose of the Study:

• To compare the efficacy of two different infusion doses of magnesium sulfate in controlling tetanic spasms.
• To evaluate magnesium sulfate as an adjunct to diazepam therapy for tetanus.

Main Methods:

• Retrospective analysis of 14 adult male patients with tetanus admitted to the ICU.
• Patients were divided into two groups receiving different magnesium sulfate infusion doses (Group 1: <1 g/h; Group 2: 1.5-2 g/h) as an adjunct to diazepam.
• Severity was graded using the Ablett scale.

Main Results:

• Group 1 patients had a longer duration of symptoms before hospital admission and a higher requirement for diazepam in severe cases (Ablett grade III) due to dose limitation by hypotension.
• In patients receiving magnesium sulfate for ≥10 days, diazepam requirement decreased in the second week of infusion in Group 2, but not in Group 1.
• Higher magnesium sulfate doses were associated with better spasm control when hypotension was not a limiting factor.

Conclusions:

• Higher-dose magnesium sulfate infusion can effectively control tetanic spasms as an adjunct to diazepam in select patients.
• Hypotension, cardiac arrhythmia, and renal failure are critical factors limiting magnesium sulfate infusion dosage.
• Further research is needed to establish optimal dosing and safety profiles for magnesium sulfate in tetanus management.