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Proliferative Diabetic RetinopathyPhase 3IMPETUS-DNCT02157350

The Individually Marked Panretinal lasEr phoTokoagUlation for Proliferative Diabetic Retinopathy Study - DETECT

A Phase 3 study testing Panretinal laser photocoagulation in people with Proliferative Diabetic Retinopathy, run by Odense University Hospital at 1 site in Denmark.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to determine the threshold level of proliferative diabetic retinopathy progression and regression after standard panretinal photocoagulation. Predictors of progression and regression will be identified which will include retinal vessel geometry (caliber, fractals and tortuosity), retinal… Read more about this study

Who is it for?
Ages 18 to 90 years
Conditions the study is for
Proliferative Diabetic Retinopathy
What is being tested?
Panretinal laser photocoagulation
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
65 participants
Where
1 siteDenmark
Study dates
Aug 2014to 30 Sep 2017
Phase
Phase 3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 90 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Diabetes mellitus
  • Proliferative diabetic retinopathy of one or both eyes

Who cannot join

  • Diabetic macular edema on current eye
  • Earlier PRP treatment on current eye
  • Cataract demanding treatment on current eye
  • Pregnancy

Trial locations and contacts

1 site in 1 country.

Denmark1 site
  • Research Unit of Ophthalmology, Clinical Institute, University of Southern Denmark, Department of Ophthalmology, Odense University Hospital.

    Odense, Fyn, 5000

Other trials in Denmark

About this study

Official title: A Prospective Study to Identify Predictive Factors for Progression and Regression of Proliferative Diabetic Retinopathy in Patients Receiving Standard Panretinal Laser Photocoagulation.

The purpose of this study is to determine the threshold level of proliferative diabetic retinopathy progression and regression after standard panretinal photocoagulation. Predictors of progression and regression will be identified which will include retinal vessel geometry (caliber, fractals and tortuosity), retinal vessel oxygen saturation and retinal areas of non-perfusion.

Read the detailed description

IMPETUS 2018 - DETECT is a six-month prospective study involving 90 treatment-naïve diabetes patients with proliferative diabetic retinopathy (PDR) referred for panretinal laser photocoagulation (PRP) treatment to the Department of Ophthalmology, Odense University Hospital between July 1st 2014 and June 30th 2015.

Project information will be given prior to the study to the ophthalmological departments of and to all private practicing ophthalmologists in the Region of Southern Denmark. Patients will at baseline have a standard examination that will include wide-field fundus photography, wide-field fluorescein angiography and spectral domain optical coherence tomography (SD-OCT) in order to confirm the diagnosis of PDR. If they meet the criteria of inclusion and not those of exclusion, they will be informed of the study verbally and writing and offered the chance to participate. Prior to the first session of PRP patients enrolled in the study will receive the rest of the baseline examinations including retinal oximetry. Standard PRP treatment will be given in two sessions by a trained doctor.

Patients will be re-examined at month 3 and 6 and progression/regression of PDR will be evaluated by measuring the amount of fluorescein leakage by wide-field fluorescein angiography at 1, 5 and 10 minutes. For patients with regression, supplementary PRP will be offered. After the final examination at month 6, patients will be referred back to their primary ophthalmologist.

A study nurse and a photographer will be assigned to the project. All examinations will be standardized and the study crew will be fully certified. Data will be analyzed with respect to the endpoint of the study (Stata 13, StataCorp, College Station, Texas) and also used to create the algorithm to be used for individualized treatment in IMPETUS 2018 - TREAT.

In the Region of Southern Denmark it is estimated that 200 treatment naïve patients with PDR will be referred for treatment annually. With an estimated participation rate of 50% and a subsequent dropout rate of 10%, IMPETUS 2018 - DETECT will include 90 patients. A traditional power calculation is not feasibly due to the design of the study with multiple outcomes studies.

Being tested
Panretinal laser photocoagulation
Keywords
Eye Diseases, Proliferative Diabetic Retinopathy, Retinal Vessel Geometry, Retinal Oxymetry, Retina Ischemia, Panretinal Photocoagulation, Lasers, Semiconductor, Fluorescein Angiography
Medical subject headings
Eye Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Panretinal laser photocoagulationProcedure or surgery

    Also called NAVILAS laser, Retinal Laser Photocoagulation

    Panretinal photocoagulation. Laser energy is given to the retina in two sittings, carefully avoiding the macular. The energy are placed 2 to 3 disc diameters away from the macula and the disc outside the arcades and extended peripherally upto the equator and beyond.

Study groups in NCT02157350
Study groupRoleWhat they receive
Panretinal Laser PhotocoagulationExperimentalSee interventional description.
Receives: Procedure: Panretinal laser photocoagulation

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Proliferative diabetic retinopathy progression/regression.

    Progression/regression of proliferative diabetic retinopathy will be evaluated by measuring the amount of fluorescein leakage by wide-field fluorescein angiography at 1, 5 and 10 minutes. These measurements will be performed at baseline, and during followup after panretinal photocoagulation (3 months and 6 months).

    Measured: Change from baseline in proliferative diabetic retinopathy at 6 months

Secondary outcomes (1)
  1. Retinal vessel geometry (caliber, fractals and tortuosity)

    Change in vessel geometry:

    Caliber: Using a computerised program - SIVA / IVAN. Fractals: Using a computerised program - SIVA. Tortuosity: Using a computerised program - SIVA

    Measured: Measurements assessed at baseline and 3 and 6 months after panretinal laser photocoagulation.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Jun 2014 (estimated)
  2. Study startAug 2014
  3. Primary completion30 Sep 2017
  4. Study completion30 Sep 2017

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
Panretinal photocoagulation
Masking
None (open label)
Enrolment
65 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02157350
Sponsor's protocol ID
OUH-4202-ID-2018
Other IDs
S-20140046
Acronym
IMPETUS-D
Status last verified
Jan 2019
First submitted
4 Jun 2014
Last updated
25 Jan 2019
Results posted
No
Data monitoring committee
Yes
Individual data sharing
No

Publications

  • Grauslund J, Green A, Sjolie AK. Blindness in a 25-year follow-up of a population-based cohort of Danish type 1 diabetic patients. Ophthalmology. 2009 Nov;116(11):2170-4. doi: 10.1016/j.ophtha.2009.04.043. Epub 2009 Sep 10.

    PubMed 19744716
  • Grauslund J, Green A, Sjolie AK. Prevalence and 25 year incidence of proliferative retinopathy among Danish type 1 diabetic patients. Diabetologia. 2009 Sep;52(9):1829-35. doi: 10.1007/s00125-009-1450-4. Epub 2009 Jul 12.

    PubMed 19593541
  • Stefansson E. Ocular oxygenation and the treatment of diabetic retinopathy. Surv Ophthalmol. 2006 Jul-Aug;51(4):364-80. doi: 10.1016/j.survophthal.2006.04.005.

    PubMed 16818083
  • Preliminary report on effects of photocoagulation therapy. The Diabetic Retinopathy Study Research Group. Am J Ophthalmol. 1976 Apr;81(4):383-96. doi: 10.1016/0002-9394(76)90292-0.

    PubMed 944535
  • Photocoagulation treatment of proliferative diabetic retinopathy. Clinical application of Diabetic Retinopathy Study (DRS) findings, DRS Report Number 8. The Diabetic Retinopathy Study Research Group. Ophthalmology. 1981 Jul;88(7):583-600.

    PubMed 7196564
  • Ferris FL 3rd, Podgor MJ, Davis MD. Macular edema in Diabetic Retinopathy Study patients. Diabetic Retinopathy Study Report Number 12. Ophthalmology. 1987 Jul;94(7):754-60. doi: 10.1016/s0161-6420(87)33526-2.

    PubMed 3658347
  • Early photocoagulation for diabetic retinopathy. ETDRS report number 9. Early Treatment Diabetic Retinopathy Study Research Group. Ophthalmology. 1991 May;98(5 Suppl):766-85.

    PubMed 2062512
  • Klein R, Klein BE, Moss SE, Wong TY, Hubbard L, Cruickshanks KJ, Palta M. The relation of retinal vessel caliber to the incidence and progression of diabetic retinopathy: XIX: the Wisconsin Epidemiologic Study of Diabetic Retinopathy. Arch Ophthalmol. 2004 Jan;122(1):76-83. doi: 10.1001/archopht.122.1.76.

    PubMed 14718299
  • Rogers SL, Tikellis G, Cheung N, Tapp R, Shaw J, Zimmet PZ, Mitchell P, Wang JJ, Wong TY. Retinal arteriolar caliber predicts incident retinopathy: the Australian Diabetes, Obesity and Lifestyle (AusDiab) study. Diabetes Care. 2008 Apr;31(4):761-3. doi: 10.2337/dc07-1622. Epub 2008 Jan 9.

    PubMed 18184895
  • Klein R, Klein BE, Moss SE, Wong TY. Retinal vessel caliber and microvascular and macrovascular disease in type 2 diabetes: XXI: the Wisconsin Epidemiologic Study of Diabetic Retinopathy. Ophthalmology. 2007 Oct;114(10):1884-92. doi: 10.1016/j.ophtha.2007.02.023. Epub 2007 May 30.

    PubMed 17540447
  • Grauslund J, Hodgson L, Kawasaki R, Green A, Sjolie AK, Wong TY. Retinal vessel calibre and micro- and macrovascular complications in type 1 diabetes. Diabetologia. 2009 Oct;52(10):2213-7. doi: 10.1007/s00125-009-1459-8. Epub 2009 Jul 18.

    PubMed 19618163
  • Grauslund J, Green A, Kawasaki R, Hodgson L, Sjolie AK, Wong TY. Retinal vascular fractals and microvascular and macrovascular complications in type 1 diabetes. Ophthalmology. 2010 Jul;117(7):1400-5. doi: 10.1016/j.ophtha.2009.10.047. Epub 2010 Feb 21.

    PubMed 20176399
  • Sasongko MB, Wong TY, Nguyen TT, Cheung CY, Shaw JE, Wang JJ. Retinal vascular tortuosity in persons with diabetes and diabetic retinopathy. Diabetologia. 2011 Sep;54(9):2409-16. doi: 10.1007/s00125-011-2200-y. Epub 2011 May 29.

    PubMed 21625945
  • Jorgensen CM, Hardarson SH, Bek T. The oxygen saturation in retinal vessels from diabetic patients depends on the severity and type of vision-threatening retinopathy. Acta Ophthalmol. 2014 Feb;92(1):34-9. doi: 10.1111/aos.12283. Epub 2013 Dec 16.

    PubMed 24330421
  • Ober MD, Kernt M, Cortes MA, Kozak I. Time required for navigated macular laser photocoagulation treatment with the Navilas. Graefes Arch Clin Exp Ophthalmol. 2013 Apr;251(4):1049-53. doi: 10.1007/s00417-012-2119-0. Epub 2012 Aug 7.

    PubMed 22868445

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Panretinal laser photocoagulation in people with Proliferative Diabetic Retinopathy, run by Odense University Hospital at 1 site in Denmark.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 25 Jan 2019. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Denmark. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Proliferative diabetic retinopathy progression/regression. (time frame: Change from baseline in proliferative diabetic retinopathy at 6 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT02157350, which also lists 18 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jan 2019.

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