Positive vitreous pressure: Pathophysiology, complications, prevention, and management.
Surv Ophthalmol
; 62(2): 127-133, 2017.
Article
em En
| MEDLINE
| ID: mdl-27751822
ABSTRACT
Positive vitreous pressure occurs during anterior segment intraocular surgery associated with acute hypotony and is characterized by forward displacement of the lens-iris diaphragm with shallowing of the anterior chamber resistant to reformation, repeated iris prolapse, and, in severe cases, zonular rupture and vitreous or lens prolapse that can lead to a cascade of intraoperative complications. Positive vitreous pressure is particularly common during penetrating keratoplasty, conventional nuclear expression cataract extraction, and repair of anterior open-globe injury. Hypotony resulting from aqueous loss leads to elevated vitreous pressure from 3 possible causes external scleral compression, acute intraocular intumescence, or rarely acutely increased vitreous volume. Understanding the pathophysiology of positive vitreous pressure helps in its prevention and management.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Procedimentos Cirúrgicos Oftalmológicos
/
Corpo Vítreo
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Hipotensão Ocular
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Complicações Intraoperatórias
/
Câmara Anterior
Tipo de estudo:
Etiology_studies
Idioma:
En
Revista:
Surv Ophthalmol
Ano de publicação:
2017
Tipo de documento:
Article