Outcomes of Phacoemulsification With Torsional Ultrasound

November 11, 2009 updated by: Iladevi Cataract and IOL Research Center

A Randomised Trial of Torsional Ultrasound Versus Longitudinal Ultrasound During Phacoemulsification of Age-related Cataracts: Comparison of Intra-operative Performance and Impact on Post-operative Endothelium Integrity

To determine the differences in intra-operative complications, surgical duration, fluid usage, corneal thickness and endothelium cell density in eyes undergoing microcoaxial phacoemulsification (MCP) either with Torsional or longitudinal ultrasound during the surgery and at post-operative day 1, 1 month and 3 months.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Introduced in mid 2006, torsional ultrasound (OZil, Infiniti Vision System, Alcon Laboratories, Texas, USA) uses rotational oscillations at ultrasonic frequencies to emulsify cataractous lens material in a seamless cutting motion from a tip that oscillates laterally. The side-to-side movement of the phaco tip produces minimal repulsion of lens material from the phaco tip resulting in improved followability. Clinically this translates into more effective lens removal with torsional phaco in comparison to the conventional ultrasound mode.to test this in a clinical scenario we undertook this study.

Study Type

Interventional

Enrollment (Actual)

360

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • India
    • Gujarat
      • Ahmedabad, Gujarat, India, 52
        • Raghudeep Eye Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

53 years to 73 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • patients 55 years and older with a senile cataract grades 1 to 5 nuclear sclerosis based on Emery's classification,
  • endothelial cell density > 1500 cells/mm2,
  • anterior chamber depth > 2.4 mm, and
  • a dilated pupil > 7 mm.

Exclusion Criteria:

  • eyes with pseudoexfoliation,
  • mature, traumatic, or complicated cataracts,
  • history of previous intra-ocular surgery, glaucoma, uveitis, and
  • patients who were unable to comply with follow-up examinations.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Torsional ultrasound
Torsional ultrasound with the INFINITI phacoemulsification system (Alcon Lab, USA)
Procedure: Torsional ultrasound (INFINITI, Alcon, USA)
Comparison of inta-operative efficacy and safety
Other Names:
  • OZIL technology
Active Comparator: Longitudinal ultrasound (INFINITI)
Longitudinal ultrasound with the INFINITI phacomachine (Alcon Lab, USA)
Procedure: Longitudinal U/S (Infiniti system, Alcon, USA)
comparison of efficacy and safety
Other Names:
  • traditional ultrasound
Active Comparator: Longitudinal ultrasound (LEGACY)
Longitudinal ultrasound with the LEGACY phacomachine (Alcon Lab, USA)
Procedure: Longitudinal U/S (LEGACY 20000, Alcon, USA)
Interrupted energy modality
Other Names:
  • Traditional U/S

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Intra-operative complications, surgical clock time in minutes (SCT), fluid volume in ml(FV), and central corneal thickness in µm (CCT) on day 1 and months 1 and 3, and endothelial cell density (ECD) at 3 months.
Time Frame: 3 months post-operative
3 months post-operative

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Iladevi Cataract and IOL Research Center

Investigators

  • Principal Investigator: shetal m raj, ms, Iladevi Cataract and IOL Research Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2007

Primary Completion (Actual)

December 1, 2008

Study Completion (Actual)

March 1, 2009

Study Registration Dates

First Submitted

November 9, 2009

First Submitted That Met QC Criteria

November 9, 2009

First Posted (Estimate)

November 10, 2009

Study Record Updates

Last Update Posted (Estimate)

November 13, 2009

Last Update Submitted That Met QC Criteria

November 11, 2009

Last Verified

November 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 07-009

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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