Please use this identifier to cite or link to this item: https://ahro.austin.org.au/austinjspui/handle/1/13177
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dc.contributor.authorTong, Yen
dc.contributor.authorRoyle, J Pen
dc.date.accessioned2015-05-16T02:58:07Z
dc.date.available2015-05-16T02:58:07Z
dc.date.issued1994-10-01en
dc.identifier.citationAustralian and New Zealand Journal of Surgery; 64(10): 684-7en
dc.identifier.govdoc7945065en
dc.identifier.otherPUBMEDen
dc.identifier.urihttps://ahro.austin.org.au/austinjspui/handle/1/13177en
dc.description.abstractThe contribution of duplex scanning to improving early diagnosis of graft stenosis was evaluated in 195 patients after infrainguinal bypass procedures. Over a 31 month period. 406 duplex scans were obtained on 232 limbs with 191 vein and 41 polytetrafluoroethylene (PTFE) grafts. Peak systolic velocities > 200 cm/s with spectral broadening and lumen reduction on B-mode image were the criteria adopted for identification of a haemodynamically significant (> 50%) stenosis. Sixty-one stenoses were identified in 55 of the grafted limbs. Thirty-three of the 55 limbs had a subsequent angiogram. The angiogram showed graft occlusion in six limbs, graft stenosis in 18, and native artery stenosis in four. Twenty-one of the grafts had the angiogram within 1 month after the duplex had detected graft stenosis, and one (4.76%) became occluded in this interval. Seven had an angiogram more than 1 month after the duplex study, and five (71.4%) had become occluded. The angiographic study did not confirm a graft stenosis in five limbs. Three were submitted to operation and stenosis was confirmed. Seventeen graft thromboses were detected by duplex scanning. Graft thrombosis was demonstrated following a previous negative duplex scan in one of the 106 vein grafts (0.94%), and in four of 30 PTFE grafts (13.3%). Duplex scanning is effective in the detection of graft stenosis. The precise anatomical location is less accurate when in the region of an anastomosis. Early attention should be taken when duplex studies suggest critical stenosis because there is a high risk of occlusion. Polytetrafluoroethylene grafts tend to thrombose without a precursory focal stenosis.en
dc.language.isoenen
dc.subject.otherAftercare.methodsen
dc.subject.otherAngiography, Digital Subtractionen
dc.subject.otherBlood Vessel Prosthesisen
dc.subject.otherConstriction, Pathologic.epidemiology.physiopathology.ultrasonographyen
dc.subject.otherFemoral Vein.surgery.ultrasonographyen
dc.subject.otherFollow-Up Studiesen
dc.subject.otherGraft Occlusion, Vascular.epidemiology.physiopathology.ultrasonographyen
dc.subject.otherHemodynamicsen
dc.subject.otherHumansen
dc.subject.otherPolytetrafluoroethyleneen
dc.subject.otherPopliteal Vein.surgery.ultrasonographyen
dc.subject.otherReoperationen
dc.subject.otherRisk Factorsen
dc.subject.otherSystoleen
dc.subject.otherUltrasonography, Doppler, Duplexen
dc.subject.otherVascular Patencyen
dc.titleThe value of duplex scanning in surveillance of infra-inguinal vein and synthetic grafts.en
dc.typeJournal Articleen
dc.identifier.journaltitleAustralian and New Zealand Journal of Surgeryen
dc.identifier.affiliationVascular Surgery Unit, Austin Hospital, Heidelberg, Victoria, Australiaen
dc.description.pages684-7en
dc.relation.urlhttps://pubmed.ncbi.nlm.nih.gov/7945065en
dc.type.austinJournal Articleen
local.name.researcherTong, Yisha
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairetypeJournal Article-
crisitem.author.deptVascular Surgery-
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