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Daytime mechanical ventilation in chronic respiratory insufficiency
B Schönhofer1, M Geibel, M Sonneborn
1Krankenhaus Kloster Grafschaft, Zentrum für Pneumologie, Beatmungs- und Schlafmedizin, Schmallenberg-Grafschaft, Germany.
The European Respiratory Journal
|March 11, 1998
Summary
Daytime mechanical ventilation (dMV) in awake patients with chronic respiratory insufficiency (CRI) is as effective as nocturnal mechanical ventilation (nMV) in improving blood gases and symptoms. However, nMV remains the preferred choice due to unaddressed long-term safety concerns of dMV.
Area of Science:
- Pulmonology
- Respiratory Medicine
- Critical Care
Background:
- Chronic respiratory insufficiency (CRI) often involves nocturnal hypoventilation.
- Noninvasive mechanical ventilation (NIMV) during sleep improves CRI symptoms and blood gases.
- The necessity of nocturnal application for NIMV efficacy in CRI is debated.
Purpose of the Study:
- To compare the efficacy of daytime mechanical ventilation (dMV) versus nocturnal mechanical ventilation (nMV) in patients with CRI.
- To determine if NIMV's effectiveness is contingent on administration during sleep.
Main Methods:
- Prospective case-controlled study with 34 clinically stable CRI patients.
- Patients with restrictive lung/chest wall disorders and neuromuscular disease were enrolled.
- Matched subjects were alternately allocated to dMV or nMV for 1 month.
Main Results:
- Both dMV and nMV groups showed considerable symptomatic improvement.
- No significant differences were observed between dMV and nMV in improving daytime Pa,CO2.
- Both groups demonstrated comparable improvements in transcutaneous Pa,CO2 during unassisted nighttime ventilation.
Conclusions:
- Daytime mechanical ventilation (dMV) is equally effective as nocturnal mechanical ventilation (nMV) in improving CRI.
- Nocturnal mechanical ventilation (nMV) is recommended as the primary choice for NIMV in CRI.
- Long-term safety of dMV requires further investigation before widespread adoption.