Document Detail

Design features and surgical use of a cannulated extrusion needle.
MedLine Citation:
PMID:  2777097     Owner:  NLM     Status:  MEDLINE    
A cannulated extrusion needle was designed as a modification of the standard 20-gauge extrusion by including an inner 24-gauge flexible cannula that can be extended up to 18 mm beyond the metal tip. Indications for use of the instrument are reviewed along with selected case histories demonstrating its use. The instrument is used primarily for internal subretinal fluid drainage in eyes with complex retinal detachments caused by proliferative vitreoretinopathy. The flexible cannula is guided into the subretinal space through an open peripheral retinal break and the subretinal fluid is evacuated during a simultaneous fluid/air exchange. The positive pressure of the automated air pump creates a pressure gradient sufficient to achieve passive egress of subretinal fluid through the cannula. Active suction is avoided because of the risk of posterior retinal incarceration into the cannula tip. In addition, the cannula can be used to remove hemorrhage, gas, or silicone oil in the subretinal space.
H W Flynn; W G Lee; J M Parel
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Publication Detail:
Type:  Case Reports; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv für klinische und experimentelle Ophthalmologie     Volume:  227     ISSN:  0721-832X     ISO Abbreviation:  Graefes Arch. Clin. Exp. Ophthalmol.     Publication Date:  1989  
Date Detail:
Created Date:  1989-10-25     Completed Date:  1989-10-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8205248     Medline TA:  Graefes Arch Clin Exp Ophthalmol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  304-8     Citation Subset:  IM    
Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami School of Medicine, FL 33136.
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MeSH Terms
Drainage / instrumentation*
Equipment Design
Light Coagulation
Middle Aged
Retinal Detachment / surgery*
Visual Acuity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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