Inhaled nitric oxide reverses cell-free hemoglobin-induced pulmonary hypertension and decreased lung compliance. Preliminary results

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Background: In order to test the hypothesis that inhaled nitric oxide (NO) reverses the pulmonary hypertension induced by αα-diaspirin crosslinked hemoglobin (ααHb), were studied anesthetized pigs that were administered with a total dose of 200 mg/kg of 10% ααHb. Inhaled NO (5 ppm) was administered for 10 min, and then discontinued for 10 min. This cycle was then repeated with 10 ppm inhaled NO. Results: ααHb caused pulmonary arterial pressure (PAP) to increase from 27 ± 1.7 to 40 ± 3.0 mmHg (P<0.05) and dynamic lung compliance to decrease from 29± 1.5 to 23± 1.6 ml/cmH2O (P < 0.05). After both doses of inhaled NO, but particularly 10 ppm, PAP was reduced (P < 0.05) and lung compliance increased (P < 0.05) from the ααHb levels. When inhaled NO was discontinued PAP again increased and lung compliance decreased to levels significantly different from baseline (P < 0.05). Conclusion: We conclude that cell-free hemoglobin-induced pulmonary hypertension and decreased lung compliance can be selectively counteracted by inhaled NO.

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21 Visit the original government dataset for complete information, documentation, and data access. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC28996/

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  • inhaled-nitric-oxide
  • cell-free-hemoglobin
  • nih
  • lung-compliance
  • pulmonary-hypertension

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