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Phenylephrine to Treat Hypoxemia during One-Lung Ventilation in a Pediatric Patient
Brian Schloss1, David Martin1, Allan Beebe2
1Department of Anesthesiology and Pain Medicine, Nationwide Children's Hospital, Columbus, Ohio, United States.
Insights
Phenylephrine effectively treated hypoxemia during one-lung ventilation (OLV) in a pediatric patient when standard methods failed. This highlights alpha-adrenergic agonists as a potential strategy for managing hypoxemia in thoracic surgery.
Area of Science:
- Anesthesiology
- Thoracic Surgery
- Critical Care Medicine
Background:
- One-lung ventilation (OLV) is crucial for thoracic surgery but can cause hypoxemia due to ventilation-perfusion mismatch.
- Standard treatments for OLV-induced hypoxemia include PEEP, CPAP, oxygen insufflation, and adjusting anesthetic agents.
- Hypoxic pulmonary vasoconstriction (HPV) is a key mechanism for managing V/Q mismatch during OLV.
Purpose of the Study:
- To evaluate the efficacy of phenylephrine, an alpha-adrenergic agonist, in treating refractory hypoxemia during OLV.
- To discuss the physiological basis and potential application of alpha-adrenergic agonists in managing OLV-induced hypoxemia.
Main Methods:
- Case presentation of a 12-year-old girl experiencing hypoxemia during OLV unresponsive to conventional therapies.
- Administration of a phenylephrine infusion to address the persistent hypoxemia.
- Review of literature on alpha-adrenergic agonists and their role in augmenting HPV.
Main Results:
- The phenylephrine infusion successfully corrected the hypoxemia, allowing the surgical procedure to continue.
- This case demonstrates a successful non-standard intervention for a common surgical complication.
Conclusions:
- Alpha-adrenergic agonists, such as phenylephrine, represent a viable therapeutic option for hypoxemia during OLV when standard methods are insufficient.
- Augmenting HPV with phenylephrine can improve oxygenation in complex surgical scenarios.
Abstract:
To improve surgical visualization and facilitate the procedure, one-lung ventilation (OLV) is frequently used during thoracic surgery. Although generally well tolerated, the ventilation-perfusion inequality induced by OLV may lead to a decrease in oxygenation and, at times, hypoxemia. Effective treatment algorithms and strategies are necessary for the treatment of hypoxemia during OLV to ensure that the technique can be continued without interruption and allow for completion of the surgical procedure. Treatment strategies may include applying positive end expiratory pressure to the nonoperative lung, continuous positive airway pressure or low flow oxygen insufflation to the operative lung, decreasing anesthetic agents that interfere with hypoxic pulmonary vasoconstriction (HPV), or switching to total intravenous anesthesia. Although less commonly employed, α-adrenergic agonists may also improve oxygenation during OLV by augmenting HPV. We present a 12-year-old girl who developed hypoxemia during OLV, which was not corrected by the usual maneuvers. Hypoxemia was successfully treated with a phenylephrine infusion. The potential applications of α-adrenergic agonists such as phenylephrine in the treatment of hypoxemia during OLV are discussed and its physiologic basis reviewed.
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