Sampling trabecular meshwork using TrabEx+

BMC Ophthalmology

Vipul Ramjiani¹  Graham Auger¹  Thomas Julian²  Hardeep-Singh Mudhar³ 

[1] Department of Ophthalmology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Glossop Rd, S10 2JF, Sheffield, England, UK;Department of Ophthalmology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Glossop Rd, S10 2JF, Sheffield, England, UK;The University of Sheffield, Broomhall, S10 2TG, Sheffield, England, UK;National Specialist Ophthalmic Pathology Service (NSOPS), Dept of Histopathology-E-Floor, Royal Hallamshire Hospital, Glossop Rd, S10 2JF, Sheffield, England, UK;

关键词: TrabEx+;    Trabecular meshwork;    Ab interno trabeculectomy;    Histology;    Tissue sampling;   

DOI  :  10.1186/s12886-021-01895-6

来源: Springer

【 摘 要 】

BackgroundTo report sampling of the trabecular meshwork using the TrabEx+ (MicroSurgical Technology, Redmond, Washington, USA) device in ab interno trabeculectomy. Specifically, this series focusses upon preservation of the trabecular meshwork architecture for assessment of glaucomatous features using common histopathological techniques.PatientsThis series features six glaucomatous eyes undergoing TrabEx+ with or without cataract surgery. Three patients had primary open angle glaucoma and the remaining had pigment dispersion glaucoma, ocular hypertension or uveitic glaucoma. Four eyes had simultaneous cataract surgery.MethodsTrabecular meshwork was excised using the TrabEx+ device and retrieved using vitreoretinal forceps. The samples were then processed into formalin-fixed paraffin-embedded 4 micron tissue segments and stained with haematoxylin and eosin, periodic acid–Schiff and elastin Van Gieson. Collagen IV was labelled using immunohistochemistry for the purpose of identifying the basement membrane of trabecular beams.ResultsPresence of trabecular meshwork was confirmed in five of the six samples taken. One of six samples consisted of blood only, but this was expected following early termination of the procedure due to patient restlessness. In the five positive cases trabecular beams with associated trabecular meshwork cells were identified on hematoxylin-eosin and periodic acid–Schiff staining. The beams retained their lamellar structure. The basement membrane underlying the trabecular cells was evident in three specimens, whilst two specimens were of insufficient size for collagen IV labelling.ConclusionsThis case series illustrates that TrabEx+ can be utilised to successfully retrieve trabecular meshwork samples with sufficient architectural perseveration of the tissue to enable histopathological and laboratory analysis.

【 授权许可】

CC BY