Weaned but weary: One third of adult intensive care patients mechanically ventilated for 7 days or more have impaired inspiratory muscle endurance after successful weaning

Bernie BISSETT, Isabel Leditschke, Teresa Neeman, Robert Boots, Jennifer Paratz

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Objectives: The purpose of this study was to establish whether intensive care unit (ICU) patients have impaired inspiratory muscle (IM) endurance immediately following weaning from prolonged mechanical ventilation (MV), and whether IM weakness is related to function or perceived exertion. Background: Impaired IM endurance may hinder recovery from MV, however it is unknown whether this affects patients' function or perceived exertion. Methods: Prospective observational study of 43 adult ICU patients following weaning from MV (>7 days duration). IM endurance was measured using the fatigue resistance index (FRI). Results: IM endurance was impaired (FRI=mean 0.90, SD 0.31), with 37% scoring below 0.80. IM strength did not significantly correlate with function (. r=0.24, p=0.12) or perceived exertion during exercise (. r=-0.146, p=0.37). Conclusions: IM endurance is reduced in one third of patients, while IM weakness does not appear closely associated with function or perceived exertion immediately following successful weaning.
Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalHeart and Lung
Volume44
Issue number1
DOIs
Publication statusPublished - 1 Jan 2015

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Critical Care
Weaning
Muscles
Artificial Respiration
Muscle Weakness
Fatigue
Intensive Care Units
Muscle Strength
Observational Studies
Prospective Studies
Exercise

Cite this

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title = "Weaned but weary: One third of adult intensive care patients mechanically ventilated for 7 days or more have impaired inspiratory muscle endurance after successful weaning",
abstract = "Objectives: The purpose of this study was to establish whether intensive care unit (ICU) patients have impaired inspiratory muscle (IM) endurance immediately following weaning from prolonged mechanical ventilation (MV), and whether IM weakness is related to function or perceived exertion. Background: Impaired IM endurance may hinder recovery from MV, however it is unknown whether this affects patients' function or perceived exertion. Methods: Prospective observational study of 43 adult ICU patients following weaning from MV (>7 days duration). IM endurance was measured using the fatigue resistance index (FRI). Results: IM endurance was impaired (FRI=mean 0.90, SD 0.31), with 37{\%} scoring below 0.80. IM strength did not significantly correlate with function (. r=0.24, p=0.12) or perceived exertion during exercise (. r=-0.146, p=0.37). Conclusions: IM endurance is reduced in one third of patients, while IM weakness does not appear closely associated with function or perceived exertion immediately following successful weaning.",
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author = "Bernie BISSETT and Isabel Leditschke and Teresa Neeman and Robert Boots and Jennifer Paratz",
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Weaned but weary: One third of adult intensive care patients mechanically ventilated for 7 days or more have impaired inspiratory muscle endurance after successful weaning. / BISSETT, Bernie; Leditschke, Isabel; Neeman, Teresa; Boots, Robert; Paratz, Jennifer.

In: Heart and Lung, Vol. 44, No. 1, 01.01.2015, p. 15-20.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Weaned but weary: One third of adult intensive care patients mechanically ventilated for 7 days or more have impaired inspiratory muscle endurance after successful weaning

AU - BISSETT, Bernie

AU - Leditschke, Isabel

AU - Neeman, Teresa

AU - Boots, Robert

AU - Paratz, Jennifer

PY - 2015/1/1

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AB - Objectives: The purpose of this study was to establish whether intensive care unit (ICU) patients have impaired inspiratory muscle (IM) endurance immediately following weaning from prolonged mechanical ventilation (MV), and whether IM weakness is related to function or perceived exertion. Background: Impaired IM endurance may hinder recovery from MV, however it is unknown whether this affects patients' function or perceived exertion. Methods: Prospective observational study of 43 adult ICU patients following weaning from MV (>7 days duration). IM endurance was measured using the fatigue resistance index (FRI). Results: IM endurance was impaired (FRI=mean 0.90, SD 0.31), with 37% scoring below 0.80. IM strength did not significantly correlate with function (. r=0.24, p=0.12) or perceived exertion during exercise (. r=-0.146, p=0.37). Conclusions: IM endurance is reduced in one third of patients, while IM weakness does not appear closely associated with function or perceived exertion immediately following successful weaning.

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