Ultrasonic Vitrectomy Instrument

Wuchinich, David

doi:10.1016/j.phpro.2015.03.035

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…A promising alternative to GV is the application of ultrasound (US) to liquefy and excise the vitreous [ 6 – 8 ]. US technology is widely accepted for vitrectomy during complicated cataract surgery to remove lens fragments from the posterior cavity with an US fragmentation handpiece [ 9 – 12 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment

et al. 2017

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PurposePreliminary 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.MethodsFourteen 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).ResultsThere 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.ConclusionsLM 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.

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Section: Introductionmentioning

confidence: 99%

Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment

et al. 2017

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“…One interesting concept is the idea of ultrasonic vitrectomy, which may be able to more quickly liquefy vitreous than a mechanical cutter. [18][19][20] Despite some of the current downsides, there is no question that 27-gauge vitrectomy can be successfully used in all types of cases, including vitreous opacities, macular cases, retinal detachment repair, traction retinal detachment repair, scleralfixated intraocular lenses ( Figure 5), and even retained nuclear material removal. 5,6,12,[21][22][23][24] As more vitreoretinal surgeons make the switch to 27-gauge Figure 5.…”

Section: What's Next?mentioning

confidence: 99%

Making the Jump to 27-Gauge Vitrectomy: Perspectives

Kasi¹,

Hsu²

2017

Ophthalmic Surg Lasers Imaging Retina

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“…Актуальным является поиск новых высокоэнергетических технологий, направленных на уменьшение травматизации, повышение безопасности и эффективности хирургического лечения. Тремя группами ученых было предложено использование низкочастотного ультразвука для превращения стекловидного тела в легкоудаляемую эмульсию [6][7][8][9]. Благодаря увеличению скорости удаления стекловидного тела, достигаемое при помощи увеличения частоты резов, происходит уменьшение времени хирургического вмешательства, также преимуществом является снижение тракционного воздействия и риска ятрогенных осложнение [10]…”

Section: введение / Introductionunclassified

The effect of low-frequency ultrasound on the functional and morphological state of the retina of rabbits

Vafiev,

Kontsevaya,

Aznabaev

et al. 2023

jour

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Currently, three groups of scientists are developing the introduction and use of lowfrequency ultrasound in retinal and vitreous surgery. There is not enough data and work to study the effects of this type of energy on the functional activity and structural state of the retina. In this regard, we conducted experimental and diagnostic studies using modern and objective methods. The main purpose of this article is analyzing the parameters of the electroretinogram of the rabbit retina and compare it with histological data after removal of the vitreous body using low-frequency ultrasound and mechanical action. Experiments were conducted on Chinchilla rabbits (n=40). In the experimental group (n=20), vitreous removal was performed using low-frequency ultrasound, in the control group (n=20) using a guillotine mechanism. On the 1st, 7th, 14th and 14th days, the parameters of the a- and b-waves of the electroretinogram were recorded. The structural state of the retina was also evaluated on histological sections. On the 1st day after surgery in both study groups there was a decrease in all parameters of the electroretinogram, the evaluation of histological data showed the presence of edema in most layers of the retina. On days 7 and 14, the parameters of the a- and b-waves were restored, but did not return to normal in both groups, a decrease in edema in all layers of the retina was observed on histological preparations. On day 30, the a- and b-wave indicators returned to normal, which indicates the restoration of the functional properties of photoreceptor cells, bipolar and Muller cells in both groups, the retinal layers were clearly visualized on histological sections without signs of edema. Analysis of electroretinogram parameters and histological data showed that the use of low-frequency ultrasound for vitreous removal can be considered safe and promising for further development.

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Ultrasonic Vitrectomy Instrument

Cited by 7 publications

References 2 publications

Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment

Ultrastructural and histopathologic findings after pars plana vitrectomy with a new hypersonic vitrector system. Qualitative preliminary assessment

Making the Jump to 27-Gauge Vitrectomy: Perspectives

The effect of low-frequency ultrasound on the functional and morphological state of the retina of rabbits

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