Monitoring functional residual capacity (FRC) by quantifying oxygen/carbon dioxide fluxes during a short apnea

Stenqvist, O.; Olegård, Cecilia; Søndergaard, Søren; Odenstedt, H.; Kárason, Sigurbergur; Lundin, S.

doi:10.1034/j.1399-6576.2002.460617.x

Cited by 9 publications

(2 citation statements)

References 11 publications

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“…The current EELV measurement technique (F IO 2 stepchange then nitrogen washout) was pioneered by Stenqvist and colleagues, 41,42 and several early studies with lung models, animals, and patients found the method accurate and reproducible. [42][43][44] However, the evidence regarding the value of EELV in critically ill patients remains sparse.…”

Section: Accuracy and Applicationmentioning

confidence: 99%

Innovations in Mechanical Ventilation

Branson

Johannigman

2009

respir care

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New features of mechanical ventilators are frequently introduced, including new modes, monitoring techniques, and triggering techniques. But new rarely translates into any measureable improvement in outcome. We describe 4 new techniques and attempt to define what is a new invention versus what is innovative-a technique that significantly improves a measurable variable. We describe and review the literature on automated weaning, automated measurement of functional residual capacity, neural triggering, and novel displays of respiratory mechanics.

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Section: Accuracy and Applicationmentioning

confidence: 99%

Innovations in Mechanical Ventilation

Branson

Johannigman

2009

respir care

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“…Despite numerous studies dealing with the methodological and technical aspects of FRC measurements in ventilated adult patients, 10,36,56,58,66–68,70–75,83–85 only a few studies have used FRC measurements during the treatment of patients.…”

Section: Clinical Applicationsmentioning

confidence: 99%

Measurements of functional residual capacity during intensive care treatment: the technical aspects and its possible clinical applications

Heinze

Eichler

2009

Acta Anaesthesiol Scand

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Direct measurement of lung volume, i.e. functional residual capacity (FRC) has been recommended for monitoring during mechanical ventilation. Mostly due to technical reasons, FRC measurements have not become a routine monitoring tool, but promising techniques have been presented. We performed a literature search of studies with the key words 'functional residual capacity' or 'end expiratory lung volume' and summarize the physiology and patho-physiology of FRC measurements in ventilated patients, describe the existing techniques for bedside measurement, and provide an overview of the clinical questions that can be addressed using an FRC assessment. The wash-in or wash-out of a tracer gas in a multiple breath maneuver seems to be best applicable at bedside, and promising techniques for nitrogen or oxygen wash-in/wash-out with reasonable accuracy and repeatability have been presented. Studies in ventilated patients demonstrate that FRC can easily be measured at bedside during various clinical settings, including positive end-expiratory pressure optimization, endotracheal suctioning, prone position, and the weaning from mechanical ventilation. Alveolar derecruitment can easily be monitored and improvements of FRC without changes of the ventilatory setting could indicate alveolar recruitment. FRC seems to be insensitive to over-inflation of already inflated alveoli. Growing evidence suggests that FRC measurements, in combination with other parameters such as arterial oxygenation and respiratory compliance, could provide important information on the pulmonary situation in critically ill patients. Further studies are needed to define the exact role of FRC in monitoring and perhaps guiding mechanical ventilation.

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Fast and Slow Compliance: Time, in Addition to Pressure and Volume, is a Key Factor for Lung Mechanics

Stenqvist¹,

Odenstedt²,

Lundin³

Intensive Care Medicine

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Monitoring functional residual capacity (FRC) by quantifying oxygen/carbon dioxide fluxes during a short apnea

Cited by 9 publications

References 11 publications

Innovations in Mechanical Ventilation

Innovations in Mechanical Ventilation

Measurements of functional residual capacity during intensive care treatment: the technical aspects and its possible clinical applications

Fast and Slow Compliance: Time, in Addition to Pressure and Volume, is a Key Factor for Lung Mechanics

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