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Acute Hyperventilation During Spinal Anesthesia
  1. Shuji Dohi, MD and
  2. Makoto Asano, MD
  1. From the Institute of Clinical Medicine, University of Tsukuba, Sakuramura, Ibaraki, Japan, and Shimane Medical University, Izumo City, Shimane, Japan


Acute profound hyperventilation occurred in a 44-year-old woman during abdominal hysterectomy under spinal anesthesia (sensory level of T-6). In this patient, sudden traction on the uterus triggered the hyperventilation, which persisted for about 30 minutes and produced profound hypocapnia (PaCO2, 13 torr) and carpal spasms. Some of the mechanisms involved are discussed.

  • Anesthesia
  • spinal
  • Complications
  • hypocapnia

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