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Measurement of cardiac output is often investigated using a technique based on hot-film anemometry. Here, we discuss a modification to hot-film anemometry, which involves a cylindrical heating element mounted flush on the surface of a typical Swan-Ganz catheter. In contrast to traditional thermodilution, the method discussed here has the potential to allow continuous monitoring of cardiac output. This paper demonstrates that there is a simple approximate relationship between the power input to the device to maintain a temperature of one degree above blood heat and cardiac output. Since, the heat transfer and the fluid flow decouple, a numerical model of the heat transfer of a cylindrical catheter (with heating element) sitting concentrically within a rigid cylindrical artery is developed. Numerical results were obtained for a wide selection of flow profiles, including experimental data. The results indicate that the cardiac output/power input relationship is extremely robust with respect to flow profile and system parameter variation.

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Book reviews in this article: SOCIALISM. Byr. n. berki. (J.M. Dent and Sons Ltd SOCIAL SCIENCE AND THE IGNOBLE SAVAGE. Byr. l. meek. (Cambridge University Press. EDMUND BURKE ON GOVERNMENT, POLITICS AND SOCIETY. Selected and edited bybrian w. hill. (The Harvester Press and Fontana. THOMAS HOBBES IN HIS TIME. Edited byr. ross, h. w. schneider and t. waldman. (University of Minnesota Press. HOBBES ON CIVIL ASSOCIATION. Bym. oakeshott. (Basil Blackwell. THE DISCOURSES OF NICCOLO MACHIAVELLI. Translated from the Italian with an introduction and notes byleslie j. walker, reprinted with a new introduction and appendices by. POLITICS AND LITERATURE IN THE EIGHTEENTH CENTURY. Byh. t. dickinson. (J. M. Dent. SOCIO‐POLITICAL THOUGHT IN AFRICAN LITERATURE: WEUSI?Byg.‐c. m. mutiso. (Macmillan. THE MARCH OF SOCIALISM. Byjulio alvarez del vayo, translated by. POLITICAL TERRORISM. Byp. wilkinson. (Macmillan. VIOLENCE AND THE STATE. By. l macfarlane (Nelson. SUFFRAGISTS AND LIBERALS: THE POLITICS OF WOMAN SUFFRAGE IN BRITAIN, Bydavid morgan. (Basil Blackwell. PERSPECTIVES ON PRESIDENTIAL SELECTION. Bydonald r. matthews. (Washington D.C., The Brookings Institution. Pp. CAMPAIGN‘72: THE MANAGERS SPEAK. Byernest r. may and j. fraser (eds.) (Harvard University Press, Oxford University Press. BELEAGUERED MINORITIES: CULTURAL POLITICS IN AMERICA. Bys. j. makielski, jr. (W. H. Freeman. CONFIDENTIAL DISPATCHES: ANALYSIS OF AMERICA BY THE BRITISH AMBASSADOR, 1939–1945. Byt. e. hachey (ed.) (New University Press. SOVIET AND AMERICAN SOCIETY: A COMPARISON. Bypaul hollander. (Oxford University Press. YEA OR NAY? REFEREND A IN THE UNITED KINGDOM. Bystanley alderson. (Cassell. LABOUR: THE UNIONS AND THE PARTY. Bybill simpson. (Allen and Unwin. HISTORY OF BIRMINGHAM, VOLUME III: BIRMINGHAM 1939–1970. Byanthony sutcliffe and roger smith. (Oxford University Press. BRAZIL SINCE 1964: MODERNIZATION UNDER A MILITARY REGIME. By. g.‐a. fiechter. (Macmillan. DEMOCRACY AND POLITICAL CHANGE IN VILLAGE INDIA. Bya. h. somjee. (Orient Longman. SYSTEMS THEORY IN INTERNATIONAL RELATIONS. Byj. j. weltman. Lexington Books. A LONDON BIBLIOGRAPHY OF THE SOCIAL SCIENCES, EIGHTH SUPPLEMENT 1972–73 (Vols. 29–31). (Mansell Information Publishing Ltd.