- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00370955
The Effect of Hydrodynamic Parameters on Corneal Endothelial Cell Loss After Phacoemulsification
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Patients aged 50 to 70 years old with moderate lens opacities (nuclear sclerosis of 3+) were included. The exclusion criteria were: 1-previous corneal pathology (dystrophic or degenerative such as Fuchs' endothelial dystrophy or advanced trachoma), 2- pseudoexfoliation syndrome (PEX), 3- history of intra ocular surgery, 4- glaucoma or ocular hypertension, 5- eyes with a history of anterior uveitis, 6- diabetes mellitus, 7- anterior chamber depth (ACD) less than 2.5 mm or more than 4 mm, 8- axial length less than 21 mm or more than 25 mm, 9- density of endothelial cells less than 1500 cells per mm2, 10- polymegatism (CV > 0.4), 11- keratometric astigmatism more than 1.5 Diopters (D), 12- history of contact lens usage, 13- Intra-operative complications (posterior capsule rupture with or without vitreous loss), 14- postoperative uveitis, 15- postoperative surgical wound leakage, 16- deep-set eye, and 17- size of dilated pupil less than 6 mm. Nucleus density was evaluated using the LOCS III classification system Patients were divided in 2 groups randomly: Group 1 included those candidates for phacoemulsification using high hydrodynamic parameter: 400 mmHg vacuum and 40 ml/min flow rate (high vacuum technique) whereas group 2 consisted of patients who underwent phacoemulsification using low hydrodynamic parameters: 200 mmHg vacuum and 20 ml/min flow rate (low vacuum technique). All surgeries were performed by one surgeon using stop and chop technique with sovereign (white star technology) (AMO, USA). During sculpting stage, vacuum was 40mmHg and flow rate is 20ml/min, in both groups. Irrigation aspiration of cortical material and viscoelastic were bimanually and semi automatically performed with flow rate of 30ml/min.
Total ultrasound power and total volume of BSS in both groups were measured. Pachymetry, endothelial cell density, polymegathism, before and 1, 6 and 12 weeks after intervention were also evaluated. Statistically analysis of data included univariate (student t-test and x2) and multivariate (regression model) analysis of postoperative results.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Tehran, Iran, Islamic Republic of, 16666
- Alireza Baradaran Raffiee
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria were:
- Moderate lens opacity (Nuclear sclerosis 3+)
- Age between 50 to 70 years
The exclusion criteria were:
- Previous corneal pathology (dystrophic or degenerative such as Fuchs' endothelial dystrophy or advanced trachoma),
- Pseudoexfoliation syndrome (PEX),
- History of intra ocular surgery,
- Glaucoma or ocular hypertension,
- Eyes with a history of anterior uveitis,
- Diabetes mellitus,
- Anterior chamber depth (ACD) less than 2.5 mm or more than 4 mm,
- Axial length less than 21 mm or more than 25 mm,
- Density of endothelial cells less than 1500 cells per mm2,
- Polymegatism (CV > 0.4),
- Keratometric astigmatism more than 1.5 Diopters (D),
- History of contact lens usage,
- Intra-operative complications (posterior capsule rupture with or without vitreous loss),
- Postoperative uveitis,
- Postoperative surgical wound leakage,
- Deep-set eye, and 17- size of dilated pupil less than 6 mm.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: SINGLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: High vacuum group
Those patients who underwent phacoemulsification using high hydrodynamic parameter: 400 mmHg vacuum and 40 ml/min flow rate.
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All surgeries were performed using Sovereign phacoemulsification system (AMO) using Whitestar technology.
Other Names:
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Active Comparator: Low vacuum group
Patients who underwent phacoemulsification using low hydrodynamic parameters: 200 mmHg vacuum and 20 ml/min flow rate.
|
All surgeries were performed using Sovereign phacoemulsification system (AMO) using Whitestar technology.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Total ultrasound energy dissipated to the eye, total infused fluid, Endothelial cell loss
Time Frame: All patients were examined on postoperative day 1 and weeks 1, 6 and 12.
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All patients were examined on postoperative day 1 and weeks 1, 6 and 12.
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Collaborators and Investigators
Investigators
- Principal Investigator: Alireza Baradaran Raffiee, MD, Ophthalmic Research Center of Shaheed Beheshti Medical University
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 8527
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