Abstract | BACKGROUND: OBJECTIVE: DESIGN: Open, uncontrolled trial. SETTING: Medical intensive care unit at the university hospital in Vienna, Austria. PATIENTS: INTERVENTION: MEASUREMENTS: Serial measurements of gas exchange and hemodynamic variables. RESULTS: After methylene blue administration, PaO(2) increased in all patients (from a baseline mean +/- SD of 58 +/- 2.5 mm Hg to 74 +/- 11.5 mm Hg 5 hours after infusion; P = 0.006) and the alveolar-arterial difference for partial pressure of oxygen (PAO(2) - PaO(2) ) decreased in all patients, with a maximum effect achieved after 5 hours (from 49 +/- 3.3 mm Hg to 30 +/- 10.4 mm Hg; P = 0.003); even after 10 hours, PAO(2) - PaO(2) was still significantly reduced compared with baseline (P = 0.041). Oxygenation improved because of reduction in shunt fraction (from 41% +/- 3.1% to 25% +/- 4.5%; P < 0.001). Mean pulmonary artery pressure increased (from 20 +/- 5.2 mm Hg to 23 +/- 3.6 mm Hg; P = 0. 028), as did pulmonary vascular resistance (from 58 +/- 23 dyne/sec. cm(-5) to 115 +/- 56 dyne/sec. cm(-5); P = 0.012). Arterial blood pressure did not change significantly. Cardiac output decreased (from 10.6 +/- 2.2 L/min to 8.6 +/- 2.7 L/min; P = 0.008) and systemic vascular resistance increased (from 527 +/- 144 dyne/sec. cm(-5) to 729 +/- 222 dyne/sec. cm(-5); P = 0.037). Heart rate, central venous pressure, and pulmonary capillary wedge pressure remained unchanged. CONCLUSION:
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Authors | P Schenk, C Madl, S Rezaie-Majd, S Lehr, C Müller |
Journal | Annals of internal medicine
(Ann Intern Med)
Vol. 133
Issue 9
Pg. 701-6
(Nov 07 2000)
ISSN: 0003-4819 [Print] United States |
PMID | 11074903
(Publication Type: Journal Article)
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Chemical References |
- Enzyme Inhibitors
- Guanylate Cyclase
- Oxygen
- Methylene Blue
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Topics |
- Adult
- Analysis of Variance
- Catheters, Indwelling
- Enzyme Inhibitors
(therapeutic use)
- Female
- Guanylate Cyclase
(antagonists & inhibitors)
- Hemodynamics
(drug effects)
- Hepatopulmonary Syndrome
(drug therapy, physiopathology)
- Humans
- Hypoxia
(drug therapy, etiology)
- Infusions, Intra-Arterial
- Male
- Methylene Blue
(therapeutic use)
- Middle Aged
- Oxygen
(blood)
- Pulmonary Gas Exchange
(drug effects)
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