DOI: https://doi.org/10.36347/sjams.2025.v13i02.016

Pages: 392-394

The application of thoracic segmental spinal anesthesia (TSSA) continues to expand, particularly in patients with respiratory comorbidities and those undergoing upper abdominal and thoracic procedures. While the use of high-flow nasal cannula (HFNC) is not an established method for maintenance of oxygenation during TSSA, it has the potential to optimize oxygen delivery, warranting further exploration. HFNC offers several clinical advantages over conventional oxygenation by providing a high flow of oxygen and thereby reducing the rebreathing of expired gases. HFNC also reduces work of breathing. Additionally, it generates a continuous low level of positive airway pressure, counteracting mild atelectasis and improving pulmonary mechanics, particularly in patients with limited respiratory reserve. These mechanisms suggest that HFNC could serve as a supportive measure in patients undergoing TSSA, particularly those undergoing upper abdominal and thoracic procedures with respiratory compromise.