Duplex Doppler ultrasound in the diagnosis of acute renal allograft rejection.
As renal transplantation becomes more commonplace and successful, there is an increasing demand for non-invasive methods of studying possible complications. One hundred and fifty-four duplex Doppler sonography scans were performed in 38 patients within 52 days of receiving a renal allograft. Renal vascular impedance was estimated in the intrarenal arteries by calculating the resistive index ([peak systolic frequency shift--lowest diastolic frequency shift]/peak systolic frequency shift). A resistive index of greater than 0.80 was very suggestive of rejection (positive predictive value 82%); with a value of less than 0.70 rejection was unlikely (negative predictive value, 98%).
Wan
S K
SK
Department of Radiology, Cardiff Royal Infirmary.
Ferguson
C J
CJ
Cochlin
D L
DL
Evans
C
C
Griffiths
D F
DF
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006084:Graft Rejection; D006801:Humans; D016030:Kidney Transplantation / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis*; D011446:Prospective Studies; D014463:Ultrasonography