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Table 4 Sensitivity and specificity of non-enhanced and enhanced Doppler US for the detection of RAS in 60 arteries

From: The contrast-enhanced Doppler ultrasound with perfluorocarbon exposed sonicated albumin does not improve the diagnosis of renal artery stenosis compared with angiography

 

a) Non-enhanced

 

Sensitivity

Specificity

PPV

NPV

RRA (<3,0)

56,2%

89,2%

88%

44%

PSV (<150)

69,7%

64,9%

75%

45%

RI (<0,80)

82,9%

56,8%

74%

51%

 

b) Enhanced

 

Sensitivity

Specificity

PPV

NPV

RRA (<3,0)

33,3%

97,3%

95%

40%

PSV (<150)

61,9%

64,9%

72%

42%

RI (<0,80)

76,2%

43,2%

66%

42%

  1. RRA: ratio renal/aortic PSV: peak sistolyc velocity(cm/s) RI: resistive index PPV = positive predictive value, NPV = negative predictive value RAS = Renal artery stenosis; US = ultrasonography