Abstract
Effect of carbon dioxide on the intraocular pressure in man during general anaesthesia.
Highlights
Material and methodsTen otherwise healthy urological patients (9 male and I female, aged 24 to 75 yrs) were investigated
The results of the whole group are shown in chronological order in Table I
In every case there was a marked rise in intraocular pressure (IOP) when the concentration of carbon dioxide was increased
Summary
Ten otherwise healthy urological patients (9 male and I female, aged 24 to 75 yrs) were investigated. Apart from the tonometric measurements, there was no further interference with the patient other than was required for the surgical operation. They gave no history of eye disease or recent ophthalmic symptoms and none had been taking drugs known to alter IOP. The end-tidal carbon dioxide concentration (FE'102) at the carina was measured by continuous sampling through a fine nylon catheter passed through the endotracheal tube mount. In five patients a local anaesthetic (lignocaine 2 peI cent.) was instilled into the conjunctival sac and the IOP measured before induction of anaesthesia. The IOP was measured three times by two observers at each concentration of CO2.
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