Temperature and Humidity Among Different Anesthesia Work-station

Phase 4

• Conditions: Humidity; Temperature
• Interventions: Device: Datex Ohmeda excel anesthesia machine; Device: Datex Ohmeda Avance anesthesia work-station; Device: Drager Cato anesthesia work-station; Device: Drager Primus anesthesia work-station

• Registration Number: NCT01193465
• Lead Sponsor: Korea University Anam Hospital

Brief Summary

The effects of preserving humidity and temperature by low flow anesthesia are different in each other anesthesia workstation.

Detailed Description

The fresh gas flow(FGF) is dry and cold in old fashioned anesthesia machine, especially at high folw (above 1 L/min). To the contrary, it has been assumed that the heat and humidity of FGF may be preserved using low FGF (below 1 L/min) during anesthesia or new anesthesia work station. However, it has not been proved yet. We hypothesized that the heat and moisture of FGF may be different in various FGF rate during anesthesia. In addition, it may be different in accordance to anesthesia work station. Therefore, we planed prospective observational study that will demonstrate that the difference of heat and moisture of FGF in different anesthesia work station (Excel; 1st generation anesthesia machine of Datex-Ohmeda Corp., Avance; 2nd generation anesthesia work station of Datex-Ohmeda Corp., Cato; 2nd generation generation anesthesia work station of Drager, Primus; 3rd generation generation anesthesia work station of Drager) and different FGF (0.5, 1, 4 L/min)

Study Timeline

• Study Start: 2010-01
• Status Verified: 2010-07
• Study First Submitted: 2010-08-30
• Primary Completion: 2010-09
• Study First Submitted QC: 2010-09-01
• Last Update Submitted: 2010-09-01
• Study First Posted: 2010-09-02
• Last Update Posted: 2010-09-02
• Study Completion: 2010-10

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

• patients who planned more than 2 hour operation under general anesthesia
• ASA class 1,2
• blood loss less than 500ml

Exclusion Criteria

• acute/chronic cardiac or respiratory disease

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
humidity	Datex Ohmeda excel anesthesia machine	-
humidity	Datex Ohmeda Avance anesthesia work-station	-
humidity	Drager Cato anesthesia work-station	-
humidity	Drager Primus anesthesia work-station	-

Primary Outcome Measures

Name	Time	Method
absolute humidity at both limb of breathing circuit just distal portion of Y-piece	time point 1-11	time point 1; base line value (fresh gas flow(FGF); 8L/min) time point 2; 5 mintues(min) after FGF change to predetermined level time point 3; 10 min after FGF change to predetermined level time point 4; 15 min after FGF change to predetermined level time point 5; 30 min after FGF change to predetermined level time point 6; 45 min after FGF change to predetermined level time point 7; 60 min time point 8; 75 min time point 9; 90 min time point 10; 105 min time point 11; 120 min

Secondary Outcome Measures

Name	Time	Method
patient body temperature(BT)	time point 1 -11	measure BT using esophageal temperature probe each time points are same as primary outcome
temperature at both limb of breathing circuit just distal portion of Y-piece	time point 1- 11	the time points are same as primary outcome

Trial Locations

Locations (1)

Korea University Anam Hospital; 🇰🇷 Seoul, Korea, Republic of