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Flomax Study for Floppy Iris Syndrome

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: December 3, 2010
Last Update Posted: April 28, 2015
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Roni Shtein, University of Michigan
Some men who have a history of use of Tamsulosin (Flomax) are at risk for a condition called Intraoperative Floppy Iris Syndrome that can develop during otherwise routine cataract surgery. It is not fully understood why this condition develops or who is at risk for developing it. In this study the investigators will take pictures of the iris and iris blood vessels before cataract surgery. The investigators hope that the results of this study will provide a better understanding of how Intraoperative Floppy Iris Syndrome develops and give us a non-surgical way of figuring out who might develop this problem during surgery.

Floppy Iris Syndrome

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: Diagnostic Imaging for Intraoperative Floppy Iris Syndrome

Resource links provided by NLM:

Further study details as provided by Roni Shtein, University of Michigan:

Primary Outcome Measures:
  • Intraoperative Floppy Iris Syndrome [ Time Frame: during cataract surgery ]

Enrollment: 36
Study Start Date: June 2010
Study Completion Date: December 2013
Primary Completion Date: December 2013 (Final data collection date for primary outcome measure)
Male patients scheduled for cataract surgery with current or past use of Flomax
Male adult patients scheduled for cataract surgery with no history of Flomax use

  Show Detailed Description


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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Adult male patients seen and scheduled for cataract surgery at the Kellogg eye Centers in Ann Arbor, Livonia and Brighton campuses.

Inclusion Criteria:

  • Male
  • 18 years or older
  • Scheduled for Cataract Surgery
  • Current or Past use of Tamsulosin (flomax)
  • Blue colored iris

For controls, no history of Flomax

Exclusion Criteria:

  • Females
  • Diabetes
  • Glaucoma
  • Use of medicated eye drops
  • Trauma or prior surgery to the eye
  • Black or brown iris
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01252472

United States, Michigan
Kellogg Eye Center, 1000 Wall Street
Ann Arbor, Michigan, United States, 48105
Sponsors and Collaborators
University of Michigan
Principal Investigator: Roni Shtein, MD University of Michigan Kellogg Eye Center
  More Information

Responsible Party: Roni Shtein, Assistant Professor of Ophthalmology and Visual Sciences, University of Michigan
ClinicalTrials.gov Identifier: NCT01252472     History of Changes
Other Study ID Numbers: HUM00039333
First Submitted: December 2, 2010
First Posted: December 3, 2010
Last Update Posted: April 28, 2015
Last Verified: April 2015

Keywords provided by Roni Shtein, University of Michigan:
Floppy iris Syndrome

Additional relevant MeSH terms:
Pathologic Processes
Adrenergic alpha-1 Receptor Antagonists
Adrenergic alpha-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Urological Agents