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Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound
Published on: November 3, 2023
Diaphragm dysfunction assessed by ultrasonography: influence on weaning from mechanical ventilation
Won Young Kim1, Hee Jung Suh, Sang-Bum Hong
1Department of Emergency Medicine, Ulsan University College of Medicine, Asan Medical Center, Seoul, Korea.
Critical Care Medicine
|June 28, 2011
Summary
Diaphragmatic dysfunction, identified by M-mode ultrasonography, affects 29% of medical intensive care unit patients. This condition significantly increases the risk of prolonged mechanical ventilation and weaning failure.
Area of Science:
- Critical Care Medicine
- Pulmonology
- Medical Imaging
Background:
- Diaphragmatic dysfunction is a potential complication in critically ill patients.
- Accurate diagnosis is crucial for optimizing ventilator weaning strategies.
Purpose of the Study:
- To determine the prevalence of diaphragmatic dysfunction in medical intensive care unit (MICU) patients using M-mode ultrasonography.
- To assess the impact of diaphragmatic dysfunction on ventilator weaning outcomes.
Main Methods:
- Prospective observational study in a 28-bed MICU.
- Eighty-two mechanically ventilated patients meeting spontaneous breathing trial criteria were assessed.
- M-mode ultrasonography evaluated diaphragmatic excursion during spontaneous breathing trials.
Main Results:
- Diaphragmatic dysfunction was diagnosed in 29% of patients (n=24).
- Patients with dysfunction experienced significantly longer weaning times (401 vs. 90 hours) and total ventilation (576 vs. 203 hours).
- Higher rates of primary and secondary weaning failures were observed in patients with diaphragmatic dysfunction.
Conclusions:
- M-mode ultrasonography identified diaphragmatic dysfunction in a significant portion of MICU patients without prior diaphragmatic disease.
- Diaphragmatic dysfunction is associated with increased difficulty and failure in weaning from mechanical ventilation.
- Ultrasonography can aid in identifying patients at high risk for weaning complications.
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