Primary Outcome Measures:
- Time from collapse to achieving desired range of cooling (32.0 to 34.0°C) [ Time Frame: Day of treatment ] [ Designated as safety issue: No ]
- Time from deployment of the ThermoSuit™ (start of cooled water flow to patient) to core temperature < 34.0°C [ Time Frame: Day of treatment ] [ Designated as safety issue: No ]
- Total time during the first 24 hours after cooling is initiated that the core temperature is between 32.0 and 34.0°C. [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Protocol compliance: This is defined as the proportion of patients in whom compliance (i.e. target temperature range) is achieved 85% of the time. [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Ease of use of the TSS (evaluated by clinical staff using the Product Performance Assessment questionnaire, Appendix 7) [ Time Frame: Day of treatment ] [ Designated as safety issue: No ]
- Duration of maintenance of hypothermia without supplemental cooling [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Ease of maintenance of hypothermia for 24 hours (whether or not supplemental cooling is needed) [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
Secondary Outcome Measures:
- Total number of days in ICU [ Time Frame: Time that patient is in ICU ] [ Designated as safety issue: No ]
- Barriers to compliance [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Neurologic and physical status during in-hospital recovery [ Time Frame: Time that patient is in hospital ] [ Designated as safety issue: Yes ]
- Neurologic and physical status at discharge [ Time Frame: Time that patient is discharged from hospital ] [ Designated as safety issue: Yes ]
- Neurologic and physical status at 30 ± 7 days follow-up for surviving patients [ Time Frame: 30 ± 7 days after hospital discharge ] [ Designated as safety issue: Yes ]
- Incidence of shivering during cooling and maintenance of hypothermia [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Requirements for use of paralysis to control shivering [ Time Frame: First day after treatment ] [ Designated as safety issue: No ]
- Neurologic and physical status at 6 month ± 15 days follow-up. [ Time Frame: 6 months ± 15 days after hospital discharge ] [ Designated as safety issue: Yes ]
Intervention Details:
Device: ThermoSuit(R) System
The LRS ThermoSuit System is used to cool patients using direct contact of the skin with cold water.
The primary purpose of this study is to clinically evaluate the use of a new cooling device (the LRS ThermoSuit(R) System) to cool patients who are comatose following resuscitation from cardiac arrest. This device cools by circulating cold water directly against the skin of the patient. Cooling to a state of mild hypothermia (32 to 34 degrees C, maintained for 12 to 24 hours) is recognized by the American Heart Association, European Resuscitation Council, and the Canadian Association of Emergency Care Physicians as a promising therapy for such patients, and is likely to be most effective if administered quickly following resuscitation. It is hypothesized that this new device will cool patients much more quickly than by historical means. Patients will be monitored for physiologic parameters such as body temperature during the cooling therapy, and will be tracked for neurological outcomes following treatment.