None listed
Conditions
Brief summary
There is currently very little evidence comparing pain felt by the patient post operatively between the two most commonly used local anaesthetic blocks for cataract surgery, the peribulbar (pericone) block and the sub-Tenon's (parabulbar) block. We think that the peribulbar block will have a lower pain score and analgesic use over the 24 hour period due to the less invasive nature of providing the anaesthetic.
Interventions
Peribulbar anaesthesia technique involves firstly anaesthetising the conjunctiva with oxybuprocaine hydrochloride 0.4%w/v drops. The eye and surrounding skin are sterilised with iodine solution. An injection of about 8mls of local anaesthetic solution (8ml 0.75% Ropivicaine, 2ml Xylocaine 10% and Hyalase 10units/ml solution) is given inferotemporal to the eye. Compression is applied on the eye to reduce raised intra-ocular pressure due to the volume of local anaesthetic being introduced. If the
Peribulbar anaesthesia technique involves firstly anaesthetising the conjunctiva with oxybuprocaine hydrochloride 0.4%w/v drops. The eye and surrounding skin are sterilised with iodine solution. An injection of about 8mls of local anaesthetic solution (8ml 0.75% Ropivicaine, 2ml Xylocaine 10% and Hyalase 10units/ml solution) is given inferotemporal to the eye. Compression is applied on the eye to reduce raised intra-ocular pressure due to the volume of local anaesthetic being introduced. If the block is not adequate a second medial canthal injection can be added to produce an adequate block. The cataract surgery takes about 45 minutes
Sponsors
Royal Melbourne Hospital
Study design
Allocation
Randomised controlled trial
Primary purpose
Treatment
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
Age: Over 18 years Presenting for cataract surgery at the Royal Melbourne Hospital
Exclusion criteria
Non English speaking Axial length greater than 26mm Unable to communicate with patients due to deafness or cognitive defecit Patients on anti-coagulant medication Uncontrolled hypertension >160/100
Outcome results
None listed