What is the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients?: An observational study

Ashleigh D'Arx; Nicole Freene; Sarah Bowen; Peter Bissaker; Glenn McKay; Bernie Bissett

doi:10.1016/j.hrtlng.2020.06.012

What is the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients? An observational study

Ashleigh D'Arx, Nicole Freene, Sarah Bowen, Peter Bissaker, Glenn McKay, Bernie Bissett

Physiotherapy

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

BACKGROUND: In patients undergoing elective cardiac surgery, the prevalence of inspiratory muscle weakness is not well-understood. This information could guide pre-operative therapy.

OBJECTIVES: To determine the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients, and describe relationships between pre-operative factors (including maximal inspiratory pressure, MIP) and post-operative pulmonary complications (PPCs).

METHODS: Prospective study of elective cardiac surgery patients. Pre-operative MIP was measured (cmH2O) and PPC data were extracted from medical records (Melbourne Group Score) while age, height, weight, frailty and physical activity levels were captured via questionnaire. Backwards-stepwise logistic regression was used to describe associations.

RESULTS: 24 participants were recruited (79% male, age 70 ± 10.7, BMI 26.8 ± 4.14). The prevalence of inspiratory muscle weakness (MIP < 60% predicted) was 25% (n = 6). PPCs were associated with body mass index (BMI) (r = 0.464, p = 0.022).

CONCLUSION: The prevalence of pre-operative inspiratory muscle weakness was 25%. BMI may be an important determinant of PPCs in elective cardiac surgery patients.

Original language	English
Pages (from-to)	909-914
Number of pages	6
Journal	Heart and Lung
Volume	49
Issue number	6
DOIs	https://doi.org/10.1016/j.hrtlng.2020.06.012
Publication status	Published - 1 Nov 2020

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10.1016/j.hrtlng.2020.06.012

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title = "What is the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients?: An observational study",

abstract = "BACKGROUND: In patients undergoing elective cardiac surgery, the prevalence of inspiratory muscle weakness is not well-understood. This information could guide pre-operative therapy.OBJECTIVES: To determine the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients, and describe relationships between pre-operative factors (including maximal inspiratory pressure, MIP) and post-operative pulmonary complications (PPCs).METHODS: Prospective study of elective cardiac surgery patients. Pre-operative MIP was measured (cmH2O) and PPC data were extracted from medical records (Melbourne Group Score) while age, height, weight, frailty and physical activity levels were captured via questionnaire. Backwards-stepwise logistic regression was used to describe associations.RESULTS: 24 participants were recruited (79% male, age 70 ± 10.7, BMI 26.8 ± 4.14). The prevalence of inspiratory muscle weakness (MIP < 60% predicted) was 25% (n = 6). PPCs were associated with body mass index (BMI) (r = 0.464, p = 0.022).CONCLUSION: The prevalence of pre-operative inspiratory muscle weakness was 25%. BMI may be an important determinant of PPCs in elective cardiac surgery patients.",

keywords = "Coronary artery bypass, Exercise, Physiotherapy (techniques), Respiratory muscles",

author = "Ashleigh D'Arx and Nicole Freene and Sarah Bowen and Peter Bissaker and Glenn McKay and Bernie Bissett",

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T1 - What is the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients?

T2 - An observational study

AU - D'Arx, Ashleigh

AU - Freene, Nicole

AU - Bowen, Sarah

AU - Bissaker, Peter

AU - McKay, Glenn

AU - Bissett, Bernie

PY - 2020/11/1

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N2 - BACKGROUND: In patients undergoing elective cardiac surgery, the prevalence of inspiratory muscle weakness is not well-understood. This information could guide pre-operative therapy.OBJECTIVES: To determine the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients, and describe relationships between pre-operative factors (including maximal inspiratory pressure, MIP) and post-operative pulmonary complications (PPCs).METHODS: Prospective study of elective cardiac surgery patients. Pre-operative MIP was measured (cmH2O) and PPC data were extracted from medical records (Melbourne Group Score) while age, height, weight, frailty and physical activity levels were captured via questionnaire. Backwards-stepwise logistic regression was used to describe associations.RESULTS: 24 participants were recruited (79% male, age 70 ± 10.7, BMI 26.8 ± 4.14). The prevalence of inspiratory muscle weakness (MIP < 60% predicted) was 25% (n = 6). PPCs were associated with body mass index (BMI) (r = 0.464, p = 0.022).CONCLUSION: The prevalence of pre-operative inspiratory muscle weakness was 25%. BMI may be an important determinant of PPCs in elective cardiac surgery patients.

AB - BACKGROUND: In patients undergoing elective cardiac surgery, the prevalence of inspiratory muscle weakness is not well-understood. This information could guide pre-operative therapy.OBJECTIVES: To determine the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients, and describe relationships between pre-operative factors (including maximal inspiratory pressure, MIP) and post-operative pulmonary complications (PPCs).METHODS: Prospective study of elective cardiac surgery patients. Pre-operative MIP was measured (cmH2O) and PPC data were extracted from medical records (Melbourne Group Score) while age, height, weight, frailty and physical activity levels were captured via questionnaire. Backwards-stepwise logistic regression was used to describe associations.RESULTS: 24 participants were recruited (79% male, age 70 ± 10.7, BMI 26.8 ± 4.14). The prevalence of inspiratory muscle weakness (MIP < 60% predicted) was 25% (n = 6). PPCs were associated with body mass index (BMI) (r = 0.464, p = 0.022).CONCLUSION: The prevalence of pre-operative inspiratory muscle weakness was 25%. BMI may be an important determinant of PPCs in elective cardiac surgery patients.

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KW - Exercise

KW - Physiotherapy (techniques)

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What is the prevalence of inspiratory muscle weakness in preoperative cardiac surgery patients? An observational study

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