Induction of therapeutic hypothermia after cardiac arrest in prehospital patients using ice-cold Ringer’s solution: a pilot study

The cooling and haemodynamic effects of prehospital infusion of ice-cold Ringer’s solution were studied in 13 adult patients after successful resuscitation from non-traumatic cardiac arrest. After haemodynamics stabilisation, 30 ml/kg of Ringer’s solution was infused at a rate of 100 ml/min into the antecubital vein. Arterial blood pressure and blood gases, pulse rate, end-tidal CO2 and oesophageal temperature were monitored closely. The mean core temperature decreased from 35.8 ± 0.9 °C at the start of infusion to 34.0 ± 1.2 °C on arrival at hospital (P < 0.0001). No serious adverse haemodynamic effects occurred. It is concluded that the induction of therapeutic hypothermia using this technique in the prehospital setting is feasible. [Copyright &y& Elsevier]