RT info:eu-repo/semantics/article
T1 Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment
A1 Pastor Idoate, Salvador
A1 Bonshek, Richard
A1 Irion, Luciane
A1 Zambrano, Isaac
A1 Carlin, Paul
A1 Mironov, Aleksandr
A1 Bishop, Paul
A1 McLeod, David
A1 Stanga, Paulo Eduardo
AB AbstractPurpose: Preliminary assessment of a new prototype ultrasound-based hypersonic vitrector (HV) by qualitatively examining the histopathological changes in the retina and vitreous body after pars plana vitrectomy (PPV) and its ability to fragment vitreous collagen.Methods: Fourteen porcine cadaveric eyes, 20 eyes in live swine and six human cadaveric eyes underwent PPV using the HV or a pneumatic guillotine vitrector (GV). An additional 4 porcine crystalline lenses were touched with either the HV or GV for 1 minute. Following PPV, human vitreous was removed and processed for electron microscopy (EM). Eyes and lenses were fixed and sectioned for light microscopy (LM).Results: There were no macroscopic retinal or optic nerve defects associated with either HV or GV PPVs. Cadaveric retinal specimens showed separation of the inner limiting membrane (ILM) and vacuolization and fragmentation at the nerve fiber layer (NFL) and the ganglion cell layer (GCL). ILM fragmentation and separation were found after PPV in live swine with both vitrectors. Small disruptions of the posterior capsule or structural lens defects were found after HV touch. The EM analysis revealed more fragmentation of human vitreous collagen fibrils after HV compared to GV PPV.Conclusions: LM and EM analysis of retina, vitreous, and crystalline lens after PPV showed similar morphological changes using the HV or the GV. Vitreous fragmentation appeared more effective with the HV. Overall this study suggests that the HV may be a promising new technology. More work is needed to quantitatively assess its safety and efficacy.
YR 2017
FD 2017
LK https://uvadoc.uva.es/handle/10324/65117
UL https://uvadoc.uva.es/handle/10324/65117
LA eng
NO Pastor-Idoate S, Bonshek R, Irion L, Zambrano I, Carlin P, Mironov A, Bishop P, McLeod D, Stanga PE. Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment. PLoS One. 2017 Apr 11;12(4):e0173883. doi: 10.1371/journal.pone.0173883. PMID: 28399127; PMCID: PMC5388328.
DS UVaDOC
RD 11-jul-2024