Anesthetic Management of a Patient With Hemoglobin M Disease Undergoing Laparoscopic Uterine Myomectomy: A Case Report.

Hemoglobin M (Hb M) is a group of abnormal Hb variants that form methemoglobin, which leads to cyanosis. Patients with Hb M appear cyanotic but are usually asymptomatic. Cyanosis with low peripheral oxygen saturation is unresponsive to oxygen therapy despite normal partial pressure of oxygen. As such, close attention should be paid during anesthesia. We report the first case of a Hb M patient undergoing laparoscopic uterine myomectomy under general anesthesia.