Acid-base status during reconstructive surgery of the abdominal aorta.

Abolition of a temporary occlusion of the circulation in the legs during surgical reconstruction of the abdominal aorta generally exerts but little influence on the patient's acid-base status. The changes in acid-base status can be corrected by the patient himself. Routine administration of sodium bicarbonate or Tham is unnecessary. However, respiration, circulation and electrolyte balance should be carefully monitored to ensure that any disturbances in this respect can immediately be given adequate treatment. Determination of the acid-base status during the operation is a valuable aid in evaluation of the patient's condition and can be used as a guideline in therapy.