Hypokalaemia due to HIET

Hypokalaemia can be a consequence of giving HIET for inotropic support. Measure the serum potassium concentration every 2 to 4 hours and, if the serum potassium concentration is less than 3 mmol/L, use:

potassium chloride 10 to 20 mmol (child: 0.4 mmol/kg up to 20 mmol) intravenously over 1 to 2 hours, every 2 to 4 hours as required to achieve a serum potassium concentration of more than 3 mmol/L. Use a premixed solution of the appropriate intravenous fluid¹. resuscitation for poisonings - HIET

Hypokalaemia can persist for up to 24 hours after HIET stops. Monitor the serum potassium concentration for at least 24 hours after HIET.

¹ Potassium chloride should only be given using premixed infusion bags. Extemporaneously adding ampoules of potassium chloride to intravenous fluids is not safe; inadequate mixing may result in potassium being delivered at a lethal concentration. Premixed infusion bags are available in varying concentrations and volumes; the most common is potassium chloride in 1000 mL of compatible fluid. Premixed potassium chloride is also available in a smaller volume at a high concentration (10 mmol/100 mL). Choice of preparation depends on the amount of potassium required and how much fluid the patient will tolerate.Return