C.5. A spinal anesthetic was performed and a sensory level of T10 was confirmed prior to the start of the procedure. About forty minutes after initiation of monopolar TURP (M-TURP) using glycine as the bladder-irrigating solution, the patient becomes agitated and complains of nausea. Further sedation along with an antiemetic is administered. However, shortly thereafter, the patient becomes very restless, blood pressure rises, and heart rate decreases. The patient becomes cyanotic and obtunded, blood pressure precipitously falls, and pupils are dilated and unresponsive to light. What is the most likely cause of these signs and symptoms, and would these occur during bipolar TURP (B-TURP) or laser TURP (L-TURP) resection? i