Using Maximum Inspiratory Pressure to Detect ICU-Acquired Weakness
Author Information
Author(s): Tzanis Georgios, Vasileiadis Ioannis, Zervakis Dimitrios, Karatzanos Eleftherios, Dimopoulos Stavros, Pitsolis Theodore, Tripodaki Elli, Gerovasili Vasiliki, Routsi Christina, Nanas Serafim
Primary Institution: First Critical Care Department, Evangelismos Hospital, National and Kapodestrian University of Athens, Athens, Greece
Hypothesis
ICU-acquired weakness could equally affect respiratory muscles, resulting in reduced respiratory muscle strength and diminished inspiratory pressure.
Conclusion
MIP may be a useful tool for early detection of ICU-acquired weakness in critically ill patients, even when they cannot cooperate.
Supporting Evidence
- A significant correlation was found between MIP and MRC (r = 0.68, p < 0.001).
- Patients that developed ICU-AW had a longer weaning period compared to non ICU-AW patients (12 ± 14 versus 2 ± 3 days, p < 0.01).
- A cut-off point of 36 cmH2O for MIP was defined by ROC curve analysis for ICU-AW diagnosis (88% sensitivity, 76% specificity).
Takeaway
Doctors can use a special test to measure how strong a patient's breathing muscles are, which helps them find out if the patient is getting weak from being in the ICU.
Methodology
The study measured Maximum Inspiratory Pressure (MIP) in 74 ICU patients to assess the development of ICU-acquired weakness using the Medical Research Council (MRC) scale.
Potential Biases
The lack of an electrophysiological investigation may limit the interpretation of results.
Limitations
The study had a limited number of patients who regained consciousness and were evaluated by both the MRC scale and MIP.
Participant Demographics
Patients had an average age of 59 years, with 52 males and 22 females.
Statistical Information
P-Value
p < 0.001
Confidence Interval
CI:0.71-0.99
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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