Measurement of intraocular pressure during laparoscopy and its relationship to central venous pressure

Abstract Study Objective . To determine the effect of different positional degrees on hemodynamics, especially central venous pressure and intraocular pressure, and a possible interrelationship, during laparoscopic surgery. Setting . University teaching hospital (Canadian Task Force classification II-1). Patients . Seven women undergoing elective gynecologic laparoscopy. Interventions . The women were monitored for heart rate, partial pressure of oxygen, end-tidal carbon dioxide, arterial blood pressure, central venous pressure, end-tidal isoflurane concentration, and intraocular pressure in several body positions during general anesthesia. Measurements and Main Results . Intraocular pressure depends on body position (r 2 =0.58) related to central venous pressure (r 2 =0.7). Heart rate and arterial blood pressure are also dependent on the body position, but to a lesser degree. Conclusion . Continuous monitoring of intraocular pressure may help detect alterations in central venous pressure during general anesthesia for laparoscopic surgery. Undesirable alterations caused by degree of Trendelenburg position may negatively affect patients with high cardiac or ophthalmic risk.