Abstract
Nine patients were treated with Ca channel blockers by continuous intravenous infusion for perioperative management of intentionally delayed surgery. Six patients had unexpected complications such as decreased urine output and decreased saturation of blood oxygen. Those effects increased with dosage of the agents. Daily urine output was extremely increased several days after surgery probably due to discontinuation of the agents. We must consider those side effects when using Ca channel blockers for perioperative management of hypertensive subarachnoid hemorrhage patients.
