Combination of inhaled nitric oxide therapy and inverse ratio

Artificial organs · Nov 2000

Randomized Controlled Trial Clinical Trial

Combination of inhaled nitric oxide therapy and inverse ratio ventilation in patients with sepsis-associated acute respiratory distress syndrome.

Inverse ratio ventilation (IRV) is a ventilatory technique that uses an inspiratory to expiratory ratio (I:E) greater than 1:1. We studied the effects of mechanical ventilation with an I:E of 1:3, 1:1, and 2:1 on arterial oxygenation in 10 patients with sepsis-associated acute respiratory distress syndrome (ARDS). At each I:E, patients received 0 and 4 ppm of inhaled nitric oxide (INO) in random order for 30 min. ⋯ An increase in the I:E and the addition of INO significantly improved arterial oxygenation in the responders (p < 0. 0001 and p < 0.006, respectively). The combination of an increase in the I:E and INO had an additive effect on arterial oxygenation. The combined use of IRV and INO is a more effective method of avoiding hypoxemia than either INO or IRV alone.

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- K Okamoto, I Kukita, M Hamaguchi, K Kikuta, K Matsuda, and T Motoyama.
- Division of Intensive and Critical Care Medicine, Kumamoto University School of Medicine, Kumamoto, Japan. kami@kaiju.medic.kumamoto-u.ac.jp
- Artif Organs. 2000 Nov 1;24(11):902-8.
AbstractInverse ratio ventilation (IRV) is a ventilatory technique that uses an inspiratory to expiratory ratio (I:E) greater than 1:1. We studied the effects of mechanical ventilation with an I:E of 1:3, 1:1, and 2:1 on arterial oxygenation in 10 patients with sepsis-associated acute respiratory distress syndrome (ARDS). At each I:E, patients received 0 and 4 ppm of inhaled nitric oxide (INO) in random order for 30 min. Respiratory and cardiovascular parameters were measured. Of the 10 patients studied, 7 responded to IRV and 3 did not. An increase in the I:E and the addition of INO significantly improved arterial oxygenation in the responders (p < 0. 0001 and p < 0.006, respectively). The combination of an increase in the I:E and INO had an additive effect on arterial oxygenation. The combined use of IRV and INO is a more effective method of avoiding hypoxemia than either INO or IRV alone.

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Combination of inhaled nitric oxide therapy and inverse ratio ventilation in patients with sepsis-associated acute respiratory distress syndrome.

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