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NCT Number: NCT02774031

Comparison of Gas Consumption From Two Different Anesthesia Machines

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

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Key information

Conditions

Male Urogenital Diseases Female Urogenital Diseases Female Urogenital Diseases and Pregnancy Complications Pathologic Processes Pathological Conditions, Signs and Symptoms Respiration Disorders Respiratory Aspiration Respiratory Tract Diseases Urogenital Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Department of Anesthesia, St.Olavs University Hospital

Trondheim, 7006, Norway

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Aisys with Et control

Device

Aisys conventional

Device

Flow-i with ACG

Device

Flow-i conventional

Device

Primary outcomes

  1. gas consumption in ml/hr

    Time frame: 1 hour

Sponsors and collaborators

Lead sponsor

St. Olavs Hospital

Other

Collaborators

  • Norwegian University of Science and Technology

Registry information

Official study title

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

Important dates

Study start
2016
Primary completion
2017
Study completion
2017
First posted
May 16, 2016
Registry last updated
Nov 13, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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