Review highlights nitric oxide’s potential in equine hypoxaemia

Nitric oxide may be moving closer to practical use in equine anesthesia, according to a new narrative review in Veterinary Anaesthesia and Analgesia. The paper, by Adam Auckburally, Tamara L. Grubb, and Gaetano Perchiazzi, pulls together the history of nitric oxide, its established role in some human respiratory settings, and the evidence for pulsed inhaled nitric oxide, or PiNO, in anesthetized horses with hypoxaemia. The authors conclude that while inhaled nitric oxide is already licensed for selected human indications, PiNO in horses remains an emerging approach. Still, the redevelopment of the original equine delivery device suggests it could become a realistic clinical option in the near future. (sciencedirect.com)

Why it matters: Hypoxaemia is a familiar challenge in equine general anesthesia, especially in dorsally recumbent horses, where ventilation-perfusion mismatch and atelectasis can be difficult to correct. Prior studies cited in and around the review found PiNO improved arterial oxygenation, shifted perfusion toward better-aerated lung regions, and appeared to work best when cardiac output and blood pressure were maintained, including in horses supported with dobutamine. For veterinary professionals, the review is less a practice-changing guideline than a signal that a targeted pulmonary vasodilation strategy may be edging closer to real-world use for selected equine cases. (sciencedirect.com)

What to watch: Watch for prospective clinical studies using the redeveloped delivery system, especially trials that test whether PiNO improves outcomes beyond blood gas values, such as recovery quality, complications, or mortality. (sciencedirect.com)