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anaesthesia management in microvascular surgery

F Christ, J Gamble, P Raithel, B Steckmeier, K Messmer
UNLABELLED: Patients undergoing major vascular surgery frequently require a substantial intraoperative fluid replacement to assure hemodynamic stability, which is in excess of the expected fluid requirements due to starving, blood and insensible losses. This leads to a positive fluid balance which can not be readily explained. METHOD: We have used venous congestion plethysmography (VCP) a non-invasive method for measurement of microvascular parameters in limbs to investigate the changes in microvascular permeability (FFK) and the balance of Starling forces of patients undergoing surgery for unilateral femoral artery reconstruction (FEM) under epidural anaesthesia or abdominal aortic aneurysm repair (AAA) under general anaesthesia...
January 1999: Der Anaesthesist
I Vergroesen, J E Kal, J A Spaan, H B Van Wezel
OBJECTIVE: Introduction and measurement of human myocardial oxygen supply:demand ratio as a reference for quantification of coronary microvascular vasodilating drug effects in clinical studies. Myocardial oxygen consumption is the major determinant of coronary blood flow; therefore, the true vasodilating properties of coronary vasodilating drugs that may have an effect on oxygen consumption cannot be correctly assessed from blood flow changes alone. DESIGN: Prospective, controlled trial...
August 1997: Heart: Official Journal of the British Cardiac Society
T M Bird, L Strunin
With the advent of surgery under the operating microscope microvascular surgical techniques requiring prolonged anaesthesia have greatly increased in number. Local anaesthetic techniques, whilst often producing excellent surgical conditions, are limited by the duration of action of the anaesthetic agents and by the ability of the patient to remain still, often in uncomfortable positions, for periods of up to twenty hours. The use of indwelling catheters as a means of prolonging the duration of nerve blocks is discussed along with methods of sedation or general anaesthesia to enable the patient to tolerate lengthy surgical intervention...
January 1984: Canadian Anaesthetists' Society Journal
D J Macdonald
The anaesthetic management of patients for microvascular free transfer surgery requires a sound knowledge of circulatory physiology. It is important to maintain adequate arterial pressure and cardiac output. Hypervolaemic haemodilution to a haematocrit of about 35% increases the cardiac output and improves flow in the microcirculation. Systemic heat loss must be minimized and the transplant itself kept warm. Hypocapnia is to be avoided. Analgesia must be adequate. The degree of any induced vasodilatation must be balanced against the effect on the systemic arterial pressure...
September 1985: British Journal of Anaesthesia
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