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Posterior Assisted Levitation of Dropped Nucleus (PAL)

This study has been completed.
Information provided by (Responsible Party):
Jamshed Ahmed, Dow University of Health Sciences Identifier:
First received: August 24, 2009
Last updated: August 23, 2011
Last verified: September 2009
Dropping of nucleus is a common complication during cataract extraction by phacoemulsification. The investigators describe a new technique to retrieve the dropped nucleus by using an instrument called Pars Plana Levitator (ASICO-LLC, USA).


Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Posterior Assisted Levitation by Pars-Plana Levitator

Resource links provided by NLM:

Further study details as provided by Jamshed Ahmed, Dow University of Health Sciences:

Estimated Enrollment: 14
Study Start Date: January 2009
Study Completion Date: March 2011
Primary Completion Date: March 2011 (Final data collection date for primary outcome measure)
Detailed Description:
Upon recognition of posterior capsular rupture and dropping of nucleus phaco prob will be withdrawn, status of the nucleus will be visualized by posterior segment non contact lens and if the nucleus found floating, pars plana levitator will be introduced through temporal pars plana, its prongs will be opened and nucleus will be grasped between prongs. Nucleus will be lifted up till the anterior chamber where phacoemulsification will be performed in a usual manner and a posterior chamber intraocular lens will be implanted if possible in the remaining bag.

Ages Eligible for Study:   30 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients who had dropped nucleus during phacoemulsification

Inclusion Criteria:

  • Patients during cataract surgery whose nucleus will be dropped during phacoemulsification

Exclusion Criteria:

  • Completely dropped nucleus touching the posterior pole
  Contacts and Locations
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Please refer to this study by its identifier: NCT00974844

Eye Unit III, Lyari General Hospital , Dow university of Health Sciences
Karachi, Sindh, Pakistan, 74200
Sponsors and Collaborators
Dow University of Health Sciences
Principal Investigator: Shahid Wahab, FCPS Dow University of Health Sciences
  More Information

Responsible Party: Jamshed Ahmed, Assistant Professor, Dow University of Health Sciences Identifier: NCT00974844     History of Changes
Other Study ID Numbers: DUHS-SWJA
Study First Received: August 24, 2009
Last Updated: August 23, 2011

Keywords provided by Jamshed Ahmed, Dow University of Health Sciences:
posterior assisted levitation
Pars Plana
Dropped nucleus
complication of

Additional relevant MeSH terms:
Lens Diseases
Eye Diseases processed this record on June 22, 2017