弓部大動脈近傍の術中大血管損傷の治療　超低体温循環停止法の有用性

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  • Surgical Management of Aortic Arch Injury Complicating Cardiovascular Surgical Operations Utilizing Hypothermic Circulatory Arrest.
  • 超低体温循環停止法の有用性

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Injuries to the aorta complicating cardiovascular operations can be very challenging. This type of injury is usually related to manipulation of the aorta during surgical exposure or aortic cannulation. From March 1994 to October 1997, five patients with intraoperative injuries to the thoracic aorta occurred. Their ages ranged from 7 to 71 years old (mean, 43.5 years). Two were male and 3 female. Intraoperatively, trouble occurred suddenly due to acute aortic dissection related to aortic traumatic hemorrhagic disruption in three patients, and aortic cannulation in two patients. The confirmation of the diagnosis was prompted clinically, and all patients immediately underwent further surgical intervention. In terms of technique, we used a cardiopulmonary bypass (mean cardiopulmonary bypass time 239min, range 196 to 367min), and hypothermic circulatory arrest (mean arrest time 34min, range 20 to 44min, at deep hypothermia with 21.0°C urinary bladder temperature) during repair. Retrograde cerebral perfusion was utilized in two cases to assure protection for cerebral damage. Fortunately, there was no postoperative neurological complication and no hospital death in any of the cases. When such intraoperative injuries of the aorta once occur repair using aortic clamps often fail or is not feasible, and in such cases hypothermic circulatory arrest combined with retrograde cerebral perfusion should be applied to resolve this type of the serious troubles.

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