Comparison of Gas Consumption From Two Different Anesthesia Machines

Female Urogenital Diseases Clinical Trial

Official title:

Comparing Gas Consumption With Conventional Low Flow Ventilation and Gas Control Systems From Two Different Anesthesia Machines: Flow-i and Aisys

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02774031
• Other study ID #: 2015/2132
• Status: Completed
• Phase: N/A
• First received: May 12, 2016
• Last updated: November 8, 2017
• Start date: May 2016
• Est. completion date: October 20, 2017

Study information

• Verified date: November 2017
• Source: St. Olavs Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Low flow anesthesia (LFA) is used less than desirable, partly because one has considered that there might be danger of underdosing of anesthesia gas and thus risk of awareness under anesthesia.LFA has several advantages such as reducing loss of moisture and heat in the inhaled air under anesthesia and to reduce the consumption of anesthetic gas. A few anesthesia machines include an automatic gas control system: the Aisys machine, by GE Healthcare (Madison, WI, USA), and the Flow-i machine, by Maquet (Sweden).

Since these machines were introduced, only a few studies have reported their functionality and effect on gas consumption. 20 to 55% reduction of gas consumption was found. The potential reduction may have been underestimated because in the majority of cases a FGF higher than 1 l/min was still used.

In this study the consumption of anesthetic gas (desflurane) delivered by two different anesthesia machines (Aisys and Flow-i) will be compared, with and without gas control delivery systems. Gas consumption and the time needed to reach the target level of anesthetic gas concentration will be assessed. Data needed will be collected directly from the anesthesia machine, PICIS ( Electronic anesthesia record) and EPJ (Electronic patient journal). The results of this study are of interest for intraoperative ventilation and of economic and ecological interest

Recruitment information / eligibility

• Status: Completed
• Enrollment: 147
• Est. completion date: October 20, 2017
• Est. primary completion date: October 20, 2017
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Patients undergoing robot assisted laparoscopic prostatectomy, robot assisted laparoscopic cystectomy or robot assisted laparoscopic gynecological surgery

Exclusion Criteria:

• Cognitive failure, which compromises the ability for an informed consent.

• Pregnancy

• American Society of Anesthesiologists physical status classification system (ASA) IV-VI

Patients who are included in the study can be excluded for the following reasons:

• surgical technical problems (for example surgically impossible to complete the operation with robot assisted surgery)

• technical problems with the anesthesia machine

Related Conditions & MeSH terms

• Female Urogenital Diseases
• Male Urogenital Diseases
• Urologic Diseases

Intervention

Device:
• Aisys with Et control

• Aisys conventional

• Flow-i with ACG

• Flow-i conventional

Locations

Country	Name	City	State
Norway	Department of Anesthesia, St.Olavs University Hospital	Trondheim

Sponsors (2)

Lead Sponsor	Collaborator
St. Olavs Hospital	Norwegian University of Science and Technology

Country where clinical trial is conducted

Norway, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	gas consumption in ml/hr		1 hour