الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
 |  | from | 143 |  |  |
| | | from | 143 | | |
المستخلص
Many patients presenting routinely for eye surgery are atextremes of age. The majority of ophthalmic operations
(predominantly cataract surgery) are performed as day cases
under local anaesthesia.
Peribulbar anaesthesia is the technique of choice for majority of patients undergoing cataract surgery. It is safer than retrobulbar block because the needle is not inserted inside the extraocular muscle cone (Grizzard et al, 1991). Conventionally,
a mixture of lidocaine and bupivacaine is used as local anaesthetic solution (Fry et al, 1989). Limited diffusion of localanaesthetic is the main disadvantage of peribulbar anaesthesia,
giving rise to the need for repeated injections (Brahma et al,1994). This also increases the frequency of complications such as globe perforation and haemorrhage (Ripart et al, 1996). To
prevent this and increase tissue diffusion, hyaluronidase is
added in varying concentration to this mixture. However,hyaluronidase is not easily available in most countries.