Cryoanalgesia as an adjunct to topical anaesthesia in cataract surgery

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN66038725

Enrollment

100

Registered

2007-09-28

Start date

2006-12-01

Completion date

Unknown

Last updated

2016-10-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Eye Diseases: Cataract Eye Diseases Cataract

Interventions

Purpose: Cryoanalgesia alone can produce satisfactory anaethesia for cataract surgery (phacoemulsification). It does not however supersede topical anaesthesia but could offer additional benefits when

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: All those suitable to undergo surgery in the day case setting and undergoing clear corneal incision phacoemulsification under topical anaesthesia.

Exclusion criteria

Exclusion criteria: 1. Those unable to understand the information about the trial for any reason 2. Complicated cataract cases eg small pupils 3. Patients with previous intraocular surgery eg Retinal detachment, vitrectomy, trabeculectomy 4. Patients with previous intraocular inflammation: Uveitis 5. Diabetics (neuropathy) 6. Patients requiring additional anaesthesia eg. subtenons anaesthesia 7. Patients whose cataract surgery lasts longer than 20 mins

Design outcomes

Primary

Measure	Time frame
Patient comfort score during procedure as measured by the Iowa Satisfaction with Anaesthesia Scale (ISAS).	—

Secondary

Measure	Time frame
Not provided at time of registration	—

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026