COMPARATIVE STUDY
JOURNAL ARTICLE

Pressure support noninvasive positive pressure ventilation treatment of acute cardiogenic pulmonary edema

H N Wigder, P Hoffmann, D Mazzolini, A Stone, S Scholly, J Clark
American Journal of Emergency Medicine 2001, 19 (3): 179-81
11326339
We assessed cardiogenic pulmonary edema (CPE) patient response to full mask pressure support noninvasive positive pressure ventilation (NPPV). Adult patients presenting to the emergency department (ED) in acute respiratory failure who clinically required endotracheal intubation (ETI) were studied. In addition to routine therapy consisting of oxygen, nitrates, and diuretics, patients were started on full mask NPPV using a Puritan Bennett 7200 ventilator delivering pressure support 10 cm H(2)O, PEEP 5 cm H(2)O, FiO(2) 100%. Pressure support was titrated to achieve tidal volumes of 5 to 7 mL/kg, and PEEP titrated to achieve oxygen saturation (SaO(2)) > 90%. Outcome measures included arterial blood gas (ABG), Borg dyspnea score, vital signs, and need for ETI. Twenty patients mean age 74.7 +/- 14.3 years were entered on the study. Initial mean values on FiO(2) 100% by nonrebreather mask: pH 7.17 +/-.13, paCO(2) 65.5 +/- 19.4 mmHg, paO(2) 73.8 +/- 27.3 mm Hg, SaO(2) 89.7 +/- 10.0%, Borg score 8.1 +/- 1.4, and respiratory rate(RR) 38 +/- 6.3. At 60 minutes of NPPV, improvement was statistically significant: pH 7.28 (difference.11; 95% CI.04-.19), paCO(2) 45 (difference 20.5; 95% CI 8-33), Borg score 4.1 (difference 4.0; 95% CI 3-5), and RR 28.2 (difference 9.8; 95% CI 5-14). NPPV duration ranged from 30 minutes to 36 hours (median 2 hours, 45 minutes). Eighteen patients (90%) improved allowing cessation of NPPV. Two patients with concomitant severe chronic obstructive pulmonary disease (COPD) required ETI. There were no complications of NPPV. NPPV using full face mask and pressure support provided by a conventional volume ventilator is an effective treatment for CPE and may help prevent ETI.

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