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Monitoring function...
Monitoring functional residual capacity (FRC) by quantifying oxygen/carbon dioxide fluxes during a short apnea.
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Stenqvist, Ola (författare)
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Olegård, C (författare)
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Søndergaard, S (författare)
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visa fler...
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- Odenstedt Hergès, Helena (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för anestesiologi och intensivvård,Institute of Surgical Sciences, Department of Anaesthesiology and Intensive Care
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Kárason, S (författare)
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Lundin, S (författare)
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visa färre...
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(creator_code:org_t)
- 2002
- 2002
- Engelska.
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Ingår i: Acta anaesthesiologica Scandinavica. - 0001-5172. ; 46:6, s. 732-9
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- Clinically applicable methods for measuring FRC are currently lacking. This study presents a new method for FRC monitoring based on quantification of metabolic gas fluxes of O2 and CO2 during a short apnea.Base line exchange of oxygen and carbon dioxide was measured with indirect calorimetry. End-tidal ( approximately alveolar) O2 and CO2 concentrations were measured before and after a short apnea, 8-12 s, and FRC was calculated according to standard washin/washout formulas taking into account the increased solubility of CO2 in blood when the tension is increased during the apnea. The method was tested in a lung model with CO2 excretion and O2 consumption achieved by combustion of hydrogen and implemented in six ventilator-treated patients with acute respiratory failure (ARF).In the lung model the method showed excellent correlation (r = 0.98) with minimal bias (34 ml) and a good precision, limits of agreement being 160 and -230 ml, respectively, compared to the reference method. In six ARF patients changes in FRC induced by increase or decrease in PEEP and measured with the O2/CO2 flux FRC method corresponded well with changes in reference values of FRC (r = 0.76-0.94).A new method has been proposed in which FRC could be monitored from measurements of physiological fluxes of gases during a short apnea with the use of standard ICU equipment and some calculations. We anticipate that with further development, this technique could provide a new tool for monitoring respiratory changes and ventilator management in the ICU.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Anestesi och intensivvård (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Anesthesiology and Intensive Care (hsv//eng)
Nyckelord
- Adult
- Aged
- Apnea
- blood
- Blood Gas Analysis
- Calorimetry
- Indirect
- Functional Residual Capacity
- physiology
- Humans
- Male
- Middle Aged
- Models
- Biological
- Monitoring
- Physiologic
- Respiration
- Artificial
- Respiratory Insufficiency
- blood
- physiopathology
- Tidal Volume
- physiology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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