Abstract
Background: This study aimed by means of transesophageal echocardiography, to evaluate hemodynamic changes induced by pneumoperitoneum in patients with normal cardiac performance.
Methods: In this study, 11 ASA I–II patients (mean age, 39 years) with normal cardiac performance undergoing laparoscopic cholecystectomy were evaluated. A 5-MHz transesophageal biplane phased-array transducer connected to an echocardiographer was inserted after induction of anesthesia. Data were collected at three different times: before insufflation (T1), 10 min after insufflation (T2), and 5 min after desufflation (T3). At these same times, heart rate, systolic blood pressure, diastolic blood pressure, end-tidal carbon dioxide (CO2), and peak airway pressure were recorded. Statistical analysis was performed using one-way and two-way analysis of variance (ANOVA). A p value less than 0.05 was considered significant.
Results: End-systolic and end-diastolic diameters of the left ventricle, contractility, and performance parameters did not change significantly. Conversely, at insufflation, color Doppler area of the mitral backflow increased significantly (p < 0.05) when already present or showed up abruptly (T1: 0.22 ± 0.28 cm2; T2: 1.28 ± 1.02 cm2; T3: 0.49 ± 0.53 cm2).
Conclusions: Such an event is not interpreted as a mitral insufficiency. It is possibly the result of a ``contrast effect’’ caused by the absorption of CO2 microbubbles in the blood.
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Received: 12 April 1998/Accepted: 23 June 1999
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D’Ugo, D., Persiani, R., Pennestri, F. et al. Transesophageal echocardiographic assessment of hemodynamic function during laparoscopic cholecystectomy in healthy patients. Surg Endosc 14, 120–122 (2000). https://doi.org/10.1007/s004649900080
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DOI: https://doi.org/10.1007/s004649900080