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  • 1
    Electronic Resource
    Electronic Resource
    Intra-ocular pressure changes during gynaecological laparoscopy (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 51 (1996), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Laparoscopic surgery carried out under general anaesthesia is associated with physiological changes, which also determine changes in intra-ocular pressure. We measured intra-ocular pressure at each phase of gynaecological laparoscopy, carried out under propofol-alfentanil-isoflurane general anaesthesia, in young women of ASA 1 status, with no pre-existing eye disease. Measurements were made with a Perkins applanation tonometer. Mean arterial pressure and end-tidal CO, tension were kept constant throughout the study. Intra-ocular pressure decreased significantly after induction of anaesthesia, remained unchanged after a pneumoperitoneum of up to an intraperitoneal pressure of 15 mmHg had been created, increased significantly with head down tilt, but did not increase significantly above pre-induction values. Adequate depth of anaesthesia compensated for the intra-ocular pressure increase caused by head down position. Plateau airway pressure, considered as reflecting intrathoracic pressure, increased with intraperitoneal pressure elevation. However, such changes did not correlate with intra-ocular pressure changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1996.tb15042.x
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of CO2 pneumoperitoneum on early cellular markers of retinal ischemia in rabbits with α-chymotrypsin–induced glaucomarid=""id=""Presented in abstract form at the annual meeting of the Société Française d'Anesthésie-Réanimation, Paris, France, September, 1999, and the annual meeting of the European Society of Anaesthesiologists, Vienna, Austria, 2000 April (2000)
    Springer
    Surgical endoscopy and other interventional techniques 14 (2000), S. 1057 -1061 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Eye — Intraocular pressure — Glaucoma — Müller cells — Laparoscopy — Pneumoperitoneum — Peritoneal pressure — Retinal ischemia — Cytoskeleton — Actin — Vimentin — Rabbits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Increased intraperitoneal pressure in the head-down position is associated with a significant increase in intraocular pressure (IOP) in rabbits with α-chymotrypsin–induced glaucoma. Also, the retinal cells are weakened by the induction of increased IOP, and/or glaucoma, even when IOP is controlled by adequate therapy; therefore, these cells need to be protected from any additional aggression. Actin and vimentin are proteins of the retinal cell cytoskeleton that react readily in response to retinal injuries, including ischemia and glaucoma. Early changes in these cytoskeleton proteins determine the morphological changes observed after retinal damage. Therefore, we set out to investigate intracytoplasmic changes in vimentin and actin after a 4-h CO2 pneumoperitoneum in the head-down position in rabbits with α-chymotrypsin–induced glaucoma. Methods: Twenty-one rabbits with α-chymotrypsin–induced glaucoma in one eye received general anesthesia for 4 h in the head-down position and were randomly allocated to have (a) no pneumoperitoneum, (b) a 10 mmHg CO2 pneumoperitoneum, or (c) a 20 mmHg CO2 pneumoperitoneum. At the end of the trial, both the right glaucomatous and the left control eyes were enucleated and investigated immunocytochemically for alterations in vimentin and actin, and morphologically for retinal layer disorganization. Results: Except for the preexisting morphological changes induced by glaucoma, both the control and the glaucomatous eyes in all rabbits appeared normal in terms of retinal layer organization and the distribution of intracellular vimentin and actin whatever the intraperitoneal pressure level applied. Conclusion: In rabbits with α-chymotrypsin–induced glaucoma, a 4-h CO2 pneumoperitoneum of ≤20 mmHg in the head-down position did not induce either retinal layer disorganization or alteration of actin or vimentin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004640000257
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