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  • Title: [Withdrawal from the respirator (weaning) in long-term ventilation. The results in patients in a weaning center].
    Author: Schönhofer B, Haidl P, Kemper P, Köhler D.
    Journal: Dtsch Med Wochenschr; 1999 Sep 10; 124(36):1022-8. PubMed ID: 10506839.
    Abstract:
    BACKGROUND AND OBJECTIVE: Patients subjected to an increased load and with a decreased capacity of their respiratory muscles may be difficult to wean from mechanical ventilation. Using a weaning strategy with a focus on unloading respiratory muscles may be successful even after long-term mechanical ventilation. In a prospective uncontrolled study, we examined the outcome of our weaning protocol. PATIENTS AND METHODS: Under prolonged mechanical ventilation in outlying intensive care units (44.3 +/- 38.1 days) 232 patients (64.8 +/- 12.7 years, 149 males, 83 females) with the following underlying diagnoses were investigated: chronic obstructive pulmonary disease (54.3%), neuromuscular diseases (16%), thoracic restriction (10.8%), chronic left heart failure (7.3%), postsurgical ventilatory failure (6.9%) and miscellaneous conditions (4.7%). Our weaning strategy was focused on type of mechanical ventilation, endotracheal tubes, non-invasive interface, oxygen supply and transport capacity, body position and home mechanical ventilation, if an increased load or a decreased capacity of the respiratory muscles remained after weaning. RESULTS: Altogether 65% of the patients (n = 152) were weaned in a mean duration of 7.5 days. Intermittent home mechanical ventilation followed in 45 patients (19.4%). In our hospital died 64 patients (27.6%). After a stay of 19.7 +/- 12.2 days in our hospital 72.4% of the patients (n = 168) were discharged. The postdischarge 3-month mortality of the cohort was 36.5%. CONCLUSION: Applying our weaning strategy about 65% of the patients requiring long-term mechanical ventilation were successfully weaned. Weaning was achieved in approximately one fifth of the time previously spent on mechanical ventilation. However, the 3-month mortality of the investigated cohort was 36.3%.
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