Thermodilution and Fick cardiac index determinations following cardiac surgery
作者:
MICHAEL HODGES,
STAFF SERGEANT,
JOHN DOWNS,
LOUIS MITCHELL,
期刊:
Critical Care Medicine
(OVID Available online 1975)
卷期:
Volume 3,
issue 5
页码: 182-184
ISSN:0090-3493
年代: 1975
出版商: OVID
数据来源: OVID
摘要:
With the thermodilution technique, repeated determination of cardiac index (CI) has become a rapid, easily accomplished, safe procedure. We paired 77 CI determinations measured by direct Fick and thermodilution techniques in 21 patients who underwent myocardial revascularization. Commercially available thermistor-tipped catheters and a cardiac output computer were used to determine CI according to the manufacturer's instructions. Oxygen consumption and arterial-venous oxygen content differences were measured directly to determine CI by the Fick method. Comparisons were made during mechanical ventilation with and without positive end-expiratory pressure (PEEP) and during spontaneous ventilation with and without PEEP. Cardiac indices measured by the two techniques were within ±0.5 L/min/m2of each other only 76% of the time and within ±1.0 L/min/m296% of the time, if CI ≥ 4.0 L/min/m2were omitted. Ventilatory pattern had no apparent effect on results.
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