A 55-year-old diabetic patient undergoes pars plana vitrectomy (PPV) for tractional retinal detachment. The surgeon uses 'en bloc dissection' technique. This technique is PRIMARILY used for which type of membrane?
- A Epiretinal membranes (macular pucker)
- B Posterior hyaloid face in PVD
- C Dense fibrovascular proliferative membranes in diabetic TRD ✓
- D Subretinal membranes in CNVM
Correct answer: C. Dense fibrovascular proliferative membranes in diabetic TRD
Explanation
En bloc dissection is a surgical technique used in diabetic vitreoretinal surgery where the fibrovascular proliferative membrane is dissected as a single unit, with scissors used to cut bridging fibrovascular fronds between the vitreous base and retina while the vitreous remains attached. This preserves the membrane's structural integrity, reducing bleeding and iatrogenic retinal breaks. It is particularly suited to dense, adherent, multifocal diabetic TRD membranes rather than the thin ERM of macular pucker or isolated posterior hyaloid.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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