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THE VALUE OF TECHNETIUM‐99M RENOGRAPHY FOR THE DETECTION OF RENAL ARTERY STENOSIS IN PATIENTS WITH AORTIC AND LOWER LIMB VASCULAR DISEASE
Author(s) -
Judge J. S.,
Low V.,
Gajraj H.,
House A. K.
Publication year - 1992
Publication title -
australian and new zealand journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.111
H-Index - 51
eISSN - 1445-2197
pISSN - 0004-8682
DOI - 10.1111/j.1445-2197.1992.tb07552.x
Subject(s) - medicine , stenosis , renal artery stenosis , technetium 99m , aortography , radiology , radioisotope renography , renal artery obstruction , false positive paradox , renal artery , artery , scintigraphy , nuclear medicine , aorta , cardiology , kidney , machine learning , computer science
The results of technetium renography were compared with arteriography to determine whether this is a satisfactory screening test for renal artery stenosis (RAS). Sixty‐three patients were studied before aortic surgery. All were investigated by aortography and isotope renography. These tests were assessed blind and all arteriograms were graded by a single independent radiologist. Renal artery stenosis was detected by arteriography in 34 (54%) patients. Twenty‐three (37%) had mild (< 50%) stenosis, seven (11%) had moderate (50–80%) stenosis and four (6%) had severe (> 80%) stenosis. Of these 34 patients, only 6 (18%) were correctly diagnosed by isotope renography. None of the four with severe stenosis were identified. Isotope renography resulted in six true positives, six false positives, 23 true negatives and 28 false negatives. It was concluded that isotope renography did not fulfil the criteria for a screening test for the detection of RAS and appeared to be of no value in those patients undergoing aortic surgery in whom arteriography was not indicated.