Scleral Self-indentation Chandelier-assisted Peripheral Vitrectomy Under Air Rhegmatogenous Retinal Detachment.

Study Overview
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Brief Summary
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The investigators compared the incidence of trimming-induced retinal breaks, retinal redetachment rate, and final LogMAR BCVA; between scleral self-indentation and non-indentation during chandelier-assisted peripheral vitrectomy under air for eyes with primary retinal detachment. Self-indentation enables complete trimming of the vitreous base without causing iatrogenic retinal breaks, with a higher retinal reattachment rate, and with less need for chandelier shift than with non-indentation approach.

Detailed Description
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Retrospective cohort study. One hundred and thirty eyes of 130 participants with primary rhegmatogenous retinal detachment were identified. All the participants had undergone a chandelier-assisted peripheral vitrectomy under air. Scleral self-indentation had been used in 68 eyes (study group) (Indentation group), while non-indentation had been used in 62 eyes (comparison group) (Non-indentation group). Outcome variables included: Trimming-induced retinal breaks (TIRB), retinal redetachment rate, final LogMAR BCVA, and intraoperative complications.

Official Title
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Scleral Self-indentation During Chandelier-assisted Peripheral Vitrectomy Under Air for Rhegmatogenous Retinal Detachment: A Retrospective Cohort Study.

Conditions
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Retinal Detachment

Intervention / Treatment
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* Procedure: chandelier-assisted peripheral vitrectomy under air


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: - RRD with postoperative follow up > 3 months, without PVR, or with PVR A-B Exclusion Criteria: RRD with less than 3 months of postoperative follow-up, RRD with proliferative vitreoretinopathy grade C (PVR C), RRD with uveitis, RRD with choroidal detachment, Giant retinal tears, Retinal dialysis, Myopic macular hole RRD, Traumatic RD, Children < 16 years old, The later vitrectomy (if vitrectomy had been performed for RRD in both eyes)

Ages Eligible for Study
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Minimum Age: 16 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| study group (Indentation)<br>Eyes (participants) for whom chandelier-assisted peripheral vitrectomy under air had been performed with scleral indentation. (Exposure) | Procedure: chandelier-assisted peripheral vitrectomy under air<br>* chandelier-assisted peripheral vitrectomy under air for management of peripheral vitreous during RD vitrectomy; whether using indentation or non-indentation<br>|
| control group (Non-indentation)<br>eyes (participants) for whom chandelier-assisted peripheral vitrectomy under air had been performed without scleral indentation. | Procedure: chandelier-assisted peripheral vitrectomy under air<br>* chandelier-assisted peripheral vitrectomy under air for management of peripheral vitreous during RD vitrectomy; whether using indentation or non-indentation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Trimming-induced retinal breaks (TIRB) (yes/ No) | number of eyes with iatrogenic retinal breaks along vitreous base during vitreous base trimming | intraoperative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| number of Trimming-induced retinal breaks (TIRB) | number of iatrogenic retinal breaks along vitreous base during vitreous base trimming | intraoperative | 
| retinal redetachment rate (yes/no) | number of eyes in which recurrent retinal detachment occurred | within 3 months | 
| final LogMAR BCVA | best spectacle corrected visual acuity measured by decimal charts then converted to LogMAR | final follow-up visit ( at least 3 months) | 
| snellen BCVA > 20/100 (yes/ no) | number of eyes with best corrected visual acuity better than snellen's 20/100 measured by snellen's chart | 3 months | 
| Chandelier shift (yes/no) | the need to shift position of chandelier light | intraoperative | 
| Local anaesthesia augmentation (yes/no) | the need for augmenting local anesthesia for the participant to tolerate indentation | intraoperative | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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scleral indentation, chandelier light, air vitrectomy, rhegmatogenous retinal detachment