Effects of pneumoperitoneum and trendelenburg position on intraocular pressure (IOP) in isofluorane anesthetised cats


  • Arilton Teodoro de Souza Universidade de Franca
  • Débora de Oliveira Garcia Universidade de Franca
  • Lilian Toshiko Nishimura Universidade de Franca
  • Marcos Lúcio Magalhães Universidade de Franca
  • Ewaldo de Mattos-junior Universidade de Franca
  • Daniel Paulino-Junior Universidade de Franca
  • Adriana Torrecilhas Jorge Universidade de Franca
  • Cristiane dos Santos Honsho Universidade de Franca http://orcid.org/0000-0002-5307-8552




intra-abdominal pressure, body position, ocular alterations, pressure, videolaparoscopy, videosurgery


The aim of this study was to determine whether a pneumoperitoneum of 10 mmHg combined or not with the Trendelenburg position could lead to significant changes in intraocular pressure (IOP), ocular pressure perfusion (OPP), and cardiorespiratory variables; as well as determine whether a correlation exists between IOP and mean arterial blood pressure (MAP), and/or partial pressure of carbon dioxide in arterial blood (PaCO2) in cats. Animals were allocated in two groups (n=7/group): GC (without inclination) and GTREN (Trendelenburg position). The variables were recorded before (baseline) and during 30 minutes (T5-T30) after insufflation. In GTREN, a reduction in heart rate was observed at T5 and in respiratory rate at T5 and T15. There was an increase in IOP at T5-T30 in comparison to baseline. There was a reduction in potential of hydrogen in arterial blood in both groups at all times in comparison to baseline. Partial pressure of carbon dioxide in arterial blood was increased at T15-T30 in GC and at T5-T30 in GTREN. In conclusion, the pneumoperitoneum of 10mmHg CO2 did not significantly affect IOP or OPP in cats anaesthetised with isofluorane and kept under spontaneous ventilation. However, induced pneumoperitoneum combined with Trendelenburg position resulted in an increase in IOP in cats subjected to the same anaesthetic conditions, but did not affect OPP.


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How to Cite

DE SOUZA, A.T., DE OLIVEIRA GARCIA, D., NISHIMURA, L.T., MAGALHÃES, M.L., DE MATTOS-JUNIOR, E., PAULINO-JUNIOR, D., TORRECILHAS JORGE, A. and DOS SANTOS HONSHO, C., 2019. Effects of pneumoperitoneum and trendelenburg position on intraocular pressure (IOP) in isofluorane anesthetised cats. Bioscience Journal [online], vol. 35, no. 6, pp. 1899–1906. [Accessed9 December 2022]. DOI 10.14393/BJ-v35n6a2019-41904. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/41904.



Agricultural Sciences