Cataract surgery Eye Diseases Cataract surgery
Conditions
Interventions
Patients will be randomly allocated to one of two groups using sealed, numbered envelopes and computer randomisation. Group A will receive sub-tenon's anaesthesia using 4% articaine and group B will r
Sponsors
Record Provided by the NHSTCT Register - 2004 Update - Department of Health (UK)
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Patient will be selected at random from the waiting list. Letters will be sent out to the patient along with appointment letter. They will be contacted a day prior to surgery and their willingness to participate ascertained on the day of surgery.
Exclusion criteria
Exclusion criteria: 1. Aged less than 18 years 2. Previous intra-ocular surgery 3. Pupil diameter less than 5 mm when fully dilated 4. Pregnant females or of child bearing potential 5. Those known to have reduced plasma chlolinesterase levels 6. Patient unwilling to participate in the study 7. A history of allergy to amide-type anaesthetics 8. Subjects of non-therapeutic research
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The aim of the trial is to examine the possibility that the success rate of sub-tenon anaesthesia can be improved by using 4% articaine rather than the presently used combination of lignocaine/bupivacaine. Sub-tenon's anaesthesia has distinct advantages over 'sharp needle' technique, chiefly being globe perforation but currently, acceptance of this technique is hampered by poor success rate. If the success rate of sub-tenons anaesthesia could be enhanced by 4% articaine then it would become a widely used technique. Study endpoints: Collating data and to see if 4% articaine is safe and effective compared to existing lignocaine/bupivacaine anaesthetic agent. | — |
Secondary
| Measure | Time frame |
|---|---|
| Not provided at time of registration | — |
Countries
United Kingdom
Outcome results
None listed