Trial Outcomes & Findings for Intraoperative Warming Comparison of Devices (NCT NCT00650260)

Results Overview

Recruitment status

COMPLETED

Study phase

NA

Target enrollment

42 participants

Primary outcome timeframe

Intraoperative Period

Results posted on

2012-10-29

Participant Flow

Subjects were recruited as they arrived for a scheduled surgical procedure at Tampa General Hospital. Potential subjects were addressed in a private pre-operative room. The investigators or study designee evaluated the patients for the study by reviewing the inclusion and exclusion criteria.

Participant milestones

Participant milestones
Measure	vH2 System Group The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Overall Study STARTED	21	21
Overall Study COMPLETED	21	21
Overall Study NOT COMPLETED	0	0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Intraoperative Warming Comparison of Devices

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Total n=42 Participants Total of all reporting groups
Age, Categorical <=18 years	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants
Age, Categorical Between 18 and 65 years	17 Participants n=5 Participants	15 Participants n=7 Participants	32 Participants n=5 Participants
Age, Categorical >=65 years	4 Participants n=5 Participants	6 Participants n=7 Participants	10 Participants n=5 Participants
Age Continuous	51.1 years STANDARD_DEVIATION 18.3 • n=5 Participants	46.5 years STANDARD_DEVIATION 14 • n=7 Participants	48.7 years STANDARD_DEVIATION 16.5 • n=5 Participants
Sex: Female, Male Female	10 Participants n=5 Participants	11 Participants n=7 Participants	21 Participants n=5 Participants
Sex: Female, Male Male	11 Participants n=5 Participants	10 Participants n=7 Participants	21 Participants n=5 Participants
Region of Enrollment United States	21 participants n=5 Participants	21 participants n=7 Participants	42 participants n=5 Participants

PRIMARY outcome

Timeframe: Intraoperative Period

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Percent of Patients With an Average Intraoperative Temperature Greater Than or Equal to 36 Celcius	56 percentage of participants	90 percentage of participants

PRIMARY outcome

Timeframe: Temp taken just prior to surgery

Population: Per protocol, sample size calculations indicate that a total sample size of 42 patients will be necessary to evaluate the primary outcome at an adjusted alpha = 0.05 with 80% power.

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Percent of Subjects With an Initial PACU Sublingual Temperature of ≥ 36º C.	95 Percentage of participants	100 Percentage of participants

PRIMARY outcome

Timeframe: Upon entry to the post anesthesia care unit

Percent of subjects with an initial post anesthesia care unit sublingual temperature of ≥ 36º C

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Percentage of Patients With a Post Operative Sublingual Temperature Above 36 Degrees Celcius	95 Percentage of participants	100 Percentage of participants

SECONDARY outcome

Timeframe: 60 minutes post anesthesia induction

Average core body temperature measured with an esophageal probe at 60 minutes post-induction

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Comparison of the Core Body Temperatures at 60 Minutes Post Anesthesia Induction,as Assessed by Esophageal Probe.	36.4 degrees celcius Standard Deviation 0.4	36.1 degrees celcius Standard Deviation 0.5

SECONDARY outcome

Timeframe: Intraoperative 0-70 minutes

Average esophageal temperature for the first 70 minutes of surgery following induction of anesthesia.

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Average Intraoperative Esophageal Temperature	36.3 Degrees Celcius Interval 35.0 to 37.0	36.0 Degrees Celcius Interval 35.1 to 38.0

SECONDARY outcome

Timeframe: Upon arrival to the post anesthesia care unit

Outcome measures

Outcome measures
Measure	vH2 System Group n=21 Participants The vH2 system consists of a Control Unit containing the heating system and the vacuum generation pump which connects via an umbilical containing the fluid and vacuum tubing to the Warming Sleeve. The Control Unit also contains the user interface and alarm management systems. The disposable Warming Sleeve consists of a manifold attached to the warming pads and a polyurethane pouch (Vacuum Sleeve) that are placed over the patient's hand and forearm and secured with tape. The Warming Sleeve manifold contains connectors for the fluid and vacuum tubing contained in the umbilical. The vH2 System will be used for patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.	Control Group n=21 Participants The Bair Hugger system is the current standard of care at TGH. It consists of a Temperature Management Unit that contains the heating element, the air circulating motor and the temperature control mechanisms. This unit connects via a hose to the operating room blankets. The Bair Hugger technology relies on heated air convection. Warm air is circulated evenly through the air space in the specially designed blanket, warming the skin surface as well as any insulating blankets placed over the Bair Hugger blanket. The Bair Hugger System is the site's current approach to patient warming during these surgical procedures. Monitoring of core temperature via esophageal probe will be done for the purpose of data collection.
Median Post Anesthesia Care Unit Sublingual Temperature	36.4 Degrees Celcius Interval 35.9 to 37.4	36.6 Degrees Celcius Interval 36.2 to 37.1

Adverse Events

vH2 System Group

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Control Group

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Enrico Camporesi MD

University of South Florida Dept of Surgery/Anesthesiology

Phone: 813-844-7170

Email: [email protected]

Results disclosure agreements

Principal investigator is a sponsor employee
Publication restrictions are in place