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Canadian Journal of Anesthesia, Vol 36, 44-50, Copyright © 1989 by Canadian Anesthesiologists' Society

ARTICLES

The influence of collateral vascularisation on haemodynamic performance during abdominal aortic surgery

AJ Cunningham, DP O'Toole, N McDonald, F Keeling and D Bouchier-Hayes
Department of Anaesthesia, Royal College of Surgeons, Dublin, Ireland.

The extent of periaortic collateral vascularisation has been proposed as a possible mechanism of an altered haemodynamic response to infra-renal aortic cross-clamp in patients undergoing by-pass grafting for aorto-iliac occlusive disease (AOD) compared with patients undergoing abdominal aortic aneurysm (AAA) resection. The haemodynamic responses following clamping, during the clamp time and following clamp release were studied in 18 patients undergoing AAA resection and 12 patients undergoing bypass grafting for AOD. The role of preoperative aortography in predicting cardiovascular performance during aortic vascular surgery was assessed. During the cross-clamp period LVSWI and CI decreased while SVR increased in the AAA group while the AOD group showed an improved CI, stable LVSWI and reduced SVR, which correlated with the extent of periaortic vascularisation on preoperative aortography. Chronic collateral circulation associated with AOD may permit continuous lower extremity perfusion during aortic cross-clamp. The extent of periaortic collateralisation may influence the choice of monitoring techniques and anaesthetic management.


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[Abstract] [Full Text] [PDF]


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Copyright © 1989 by the Canadian Anesthesiologists' Society.