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British Journal of Anaesthesia, Vol 78, Issue 5 515-519, Copyright © 1997 by The Board of Management and Trustees of the British Journal of Anaesthesia

CLINICAL INVESTIGATIONS

Assessment of cardiovascular changes during laparoscopic hernia repair using oesophageal Doppler

E. J. Haxby, M. R. Gray, C. Rodriguez, D. Nott, M. Springall and M. Mythen
Department of Anaesthesia, Charing Cross Hospital, Fulham Palace Road, London W6 8RF; Department of Surgery, Charing Cross Hospital, Fulham Palace Road, London W6 8RF

We have used an oesophageal Doppler to measure aortic blood flow velocity before, during and after induction of carbon dioxide pneumoperitoneum in 10 consecutive patients, mean age 58 yr, undergoing laparoscopic hernia repair. Derived values for stroke distance, minute distance and systemic vascular resistance showed considerable interpatient variation indicating unpredictable haemodynamic responses. Five minutes after insufflation of the abdomen there was a significant increase in mean arterial pressure from 82.5 to 103.6 mm Hg (P < 0.05) but both stroke distance and minute distance decreased significantly (mean 12.0 (SEM 1.4) cm to 9.0 (0.7) cm, P < 0.05; and 747.5 (82) cm min-1 to 596 (49) cm min-1, P < 0.05; respectively) indicating a significant decrease in cardiac output. There was a corresponding increase in the index of systemic vascular resistance from 1092 (747) to 2079 (400) (P < 0.05) which persisted after deflation of the abdomen. Oesophageal Doppler can provide continuous online haemodynamic data with a rapid response to acute changes and may have a role in non- invasive haemodynamic monitoring during laparoscopic procedures in older patients with cardiovascular disease.
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