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Pilot Clinical Study of the LRS ThermoSuit™ System in Post Arrest Patients

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ClinicalTrials.gov Identifier: NCT00410969
Recruitment Status : Completed
First Posted : December 13, 2006
Last Update Posted : September 29, 2008
St. Michael's Hospital, Toronto
Kingston General Hospital
Information provided by:
Life Recovery Systems

Brief Summary:
The purpose of this study is to determine if the Life Recovery Systems Thermosuit(R) System is able to quickly and conveniently cool patients who are comatose after resuscitation from cardiac arrest.

Condition or disease Intervention/treatment Phase
Heart Arrest Coma Device: ThermoSuit(R) System Phase 1

Detailed Description:
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.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 27 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Pilot Clinical Study of the LRS ThermoSuit™ System in Post Arrest Patients
Study Start Date : December 2006
Primary Completion Date : February 2008
Study Completion Date : September 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Cardiac Arrest
U.S. FDA Resources

Intervention Details:
    Device: ThermoSuit(R) System
    The LRS ThermoSuit System is used to cool patients using direct contact of the skin with cold water.

Primary Outcome Measures :
  1. Time from collapse to achieving desired range of cooling (32.0 to 34.0°C) [ Time Frame: Day of treatment ]
  2. Time from deployment of the ThermoSuit™ (start of cooled water flow to patient) to core temperature < 34.0°C [ Time Frame: Day of treatment ]
  3. 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 ]
  4. 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 ]
  5. Ease of use of the TSS (evaluated by clinical staff using the Product Performance Assessment questionnaire, Appendix 7) [ Time Frame: Day of treatment ]
  6. Duration of maintenance of hypothermia without supplemental cooling [ Time Frame: First day after treatment ]
  7. Ease of maintenance of hypothermia for 24 hours (whether or not supplemental cooling is needed) [ Time Frame: First day after treatment ]

Secondary Outcome Measures :
  1. Total number of days in ICU [ Time Frame: Time that patient is in ICU ]
  2. Barriers to compliance [ Time Frame: First day after treatment ]
  3. Neurologic and physical status during in-hospital recovery [ Time Frame: Time that patient is in hospital ]
  4. Neurologic and physical status at discharge [ Time Frame: Time that patient is discharged from hospital ]
  5. Neurologic and physical status at 30 ± 7 days follow-up for surviving patients [ Time Frame: 30 ± 7 days after hospital discharge ]
  6. Incidence of shivering during cooling and maintenance of hypothermia [ Time Frame: First day after treatment ]
  7. Requirements for use of paralysis to control shivering [ Time Frame: First day after treatment ]
  8. Neurologic and physical status at 6 month ± 15 days follow-up. [ Time Frame: 6 months ± 15 days after hospital discharge ]

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Cardiac arrest prior to or during hospital admission, with restoration/return of spontaneous circulation (ROSC).
  • Cardiac arrest of presumed cardiac origin.
  • Initial (pre-resuscitation) cardiac rhythm of ventricular fibrillation, non-perfusing ventricular tachycardia, pulseless electrical activity, or asystole.
  • Estimated or known age > 18 years.
  • Intubation, ventilation and placement of esophageal probe.
  • Estimated time from collapse to the initiation of Advanced Cardiac Life Support (ACLS) < 15 minutes and return of spontaneous circulation with defibrillation within 60 minutes of collapse.
  • Persistent neurologic dysfunction i.e. comatose upon enrollment [GCS ≤ 8].

Exclusion Criteria:

  • Height greater than 188 cm.
  • Elbow-to-elbow width greater than 60 cm (as measured above the supine patient).
  • Core temperature less than 34°C after ROSC (as measured at the tympanic membrane, esophagus, sub-lingual space, nasopharynx, or central blood vessel).
  • Comatose state before the cardiac arrest due to the administration of drugs that depress the central nervous system.
  • Known pregnancy.
  • Response to verbal commands after ROSC (but before enrollment).
  • Known terminal illness that preceded the arrest.
  • Known enrollment in another study of a device, drug, or biologic.
  • Major trauma or other co-morbidity requiring urgent surgery.
  • Improving neurologic status.
  • > 8 hours since return of spontaneous circulation.
  • Unknown time of arrest.
  • Severe or known coagulopathy (with active bleeding).
  • Hemodynamic instability despite vasopressors (SBP < 90 mmHg or MAP < 60 mmHg for > 30 minutes after ROSC and before enrollment).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00410969

Canada, Ontario
Kingston General Hospital
Kingston, Ontario, Canada, K7L 2V7
St. Michael's Hospital
Toronto, Ontario, Canada, M5B 1W8
Sponsors and Collaborators
Life Recovery Systems
St. Michael's Hospital, Toronto
Kingston General Hospital
Principal Investigator: Dorian Paul, MD St. Michael's Hospital, University of Toronto
Principal Investigator: Daniel Howes, M.D. Kingston General Hospital

Additional Information:
Responsible Party: Robert Schock/Vice President, Research and Development, Livfe Recovery Systems
ClinicalTrials.gov Identifier: NCT00410969     History of Changes
Other Study ID Numbers: LRS-01-05-02
First Posted: December 13, 2006    Key Record Dates
Last Update Posted: September 29, 2008
Last Verified: September 2008

Keywords provided by Life Recovery Systems:

Additional relevant MeSH terms:
Heart Arrest
Heart Diseases
Cardiovascular Diseases