MBTAS: Macular Buckle With Three-armed Silicone

• Sponsor: Sun Yat-sen University (Other)
• Overall Status: Completed
• CT.gov ID: NCT02169635
• Collaborator: (none)
• Enrollment: 11
• Location: 1
• Arm: 1
• Duration (Months): 13
• Patients Per Site Per Month: 0.8

Study Details

Study Description

Brief Summary

High myopia is characterized by prolonged axial length and posterior staphyloma, which result in choroid-retinal degeneration and vision decrease. At present, vitrectomy can lead to anatomical improvements, but an higher axial length and the presence of a sever posterior staphyloma remains to be the two most important risk factors for poor visual outcomes. For these reasons, a different surgical approach, including macular buckling, might be considered in those patients with extremely high degree of myopia, in order to counteract the traction exerted by the posterior staphyloma. Macular buckling with or without pars plana vitrectomy had been proved to be an effective way to resolve myopic staphyloma related foveoschisis, macular hole, and associated retinal detachment. In this study, we sought to investigate the safety and efficacy of a macular buckling technique using a three-armed silicone capsule to support the posterior staphyloma in high myopia.

Condition or Disease	Intervention/Treatment	Phase
High Myopia; Posterior Staphyloma	Procedure: macular buckle	N/A

Detailed Description

1. This study plans to recruit 11 participants with 6 months follow-up to assess the safety and efficacy of a newly designed macular buckle device;

2. The macular buckle device, surgical procedure, and participants registry had been reviewed and approved by Ethics committee of Zhongshan Ophthalmic Center;

3. Only those patients are diagnosed with severe posterior staphyloma are registered.

4. All participants are fully informed before register;

5. All the surgeries are performed by single qualified doctor (Lin Lu);

6. After operation, all participant could contact the researcher via telephone, and could be assessed for any surgical related complications. If there is severe complication happened, or any person that could not tolerant the macular buckle, the implanted device will be removed;

7. Specially assigned staff (Jinge Lu) is responsible for data collection, data management, adverse events reporting, and participant communication.

Study Design

• Study Type: Interventional
• Actual Enrollment: 11 participants
• Allocation: N/A
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: Safety and Efficacy Study of Macular Buckle With A Three-armed Silicone Capsule to Support the Posterior Staphyloma in High Myopia.
• Study Start Date: May 1, 2013
• Actual Primary Completion Date: Jun 1, 2014
• Actual Study Completion Date: Jun 1, 2014

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Macula buckle Macular buckle: perform episcleral macular buckle surgery using a three-armed silicone capsule to support the posterior staphyloma in high myopia.	Procedure: macular buckle; macular buckle with a three-armed silicone capsule

Outcome Measures

Primary Outcome Measures

1. best corrected visual acuity [6 months]

Secondary Outcome Measures

1. postoperative complications [6 months]

2. Optical coherence tomography [6 months]

   Using optical coherence tomography to observe the macular area postoperatively.

Other Outcome Measures

1. intraocular pressure [6 months]

Eligibility Criteria

Criteria

• Ages Eligible for Study: 18 Years to 75 Years
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Inclusion Criteria:

• high myopia over -8.0 Diopter

• axial length over 26.5 mm

• posterior staphyloma

Exclusion Criteria:

• single eye patients

• retinal detachment beyond macular area

• a history of posterior scleritis

• a history of Glaucoma

• active hemorrhage in the surgical eye

• active inflammation in the surgical eye

• any situation that might hinder the observation of macular

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Zhongshan Ophthalmic Center	Guangzhou	Guangdong	China	510060

Sponsors and Collaborators

• Sun Yat-sen University

Investigators

• Principal Investigator: Lin Lu, MD, PhD, Zhongshan Ophthalmic Center, Sun Yat-sen University

Study Documents (Full-Text)

None provided.

More Information

Publications

• Alkabes M, Pichi F, Nucci P, Massaro D, Dutra Medeiros M, Corcostegui B, Mateo C. Anatomical and visual outcomes in high myopic macular hole (HM-MH) without retinal detachment: a review. Graefes Arch Clin Exp Ophthalmol. 2014 Feb;252(2):191-9. doi: 10.1007/s00417-013-2555-5. Epub 2014 Jan 3. Review.
• Devin F, Tsui I, Morin B, Duprat JP, Hubschman JP. T-shaped scleral buckle for macular detachments in high myopes. Retina. 2011 Jan;31(1):177-80. doi: 10.1097/IAE.0b013e3181fc7e73.
• Parolini B, Frisina R, Pinackatt S, Mete M. A new L-shaped design of macular buckle to support a posterior staphyloma in high myopia. Retina. 2013 Jul-Aug;33(7):1466-70. doi: 10.1097/IAE.0b013e31828e69ea.
• Ward B, Tarutta EP, Mayer MJ. The efficacy and safety of posterior pole buckles in the control of progressive high myopia. Eye (Lond). 2009 Dec;23(12):2169-74. doi: 10.1038/eye.2008.433.
• Ward B. Degenerative myopia: myopic macular schisis and the posterior pole buckle. Retina. 2013 Jan;33(1):224-31. doi: 10.1097/IAE.0b013e31826d3a93.

• Responsible Party: Lin Lu, Director, Fundus Disease Center of Zhongshan Ophthalmic Center, Sun Yat-sen University
• ClinicalTrials.gov Identifier: NCT02169635
• Other Study ID Numbers: 2013meky013
• First Posted: Jun 23, 2014
• Last Update Posted: Jun 23, 2014
• Last Verified: Jun 1, 2014

• Keywords provided by Lin Lu, Director, Fundus Disease Center of Zhongshan Ophthalmic Center, Sun Yat-sen University: macular buckle; high myopia; posterior staphyloma
• Additional relevant MeSH terms: Myopia

Study Results

No Results Posted as of Jun 23, 2014