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Figure 17-18 Technique for testing for shifting dullness. The shaded areas represent the areas of tympany.

Figure 17-18 Technique for testing for shifting dullness. The shaded areas represent the areas of tympany.

Table 17-4. Characteristics of Physical Signs (Pooled Data) for Detection of Ascites*

Sensitivity Specificity

Table 17-4. Characteristics of Physical Signs (Pooled Data) for Detection of Ascites*

Sensitivity Specificity

Physical Sign

%

Range

%

Range

LR+

LR—

Bulging flanks

81

69-93

59

50-68

2.0

0.3

Flank dullness

84

80-94

59

47-71

2.0

0.3

Shifting dullness

86

64-90

72

63-81

2.7

0.3

Prominent fluid wave

62

47-77

90

84-96

6.0

0.4

*95% confidence interval; data pooled from Cummings et al (1985), Simel et al (1988), Cattail et al (1982), and Williams and Simel (1992).

LR+, positive likelihood ratio; LR—, negative likelihood ratio.

*95% confidence interval; data pooled from Cummings et al (1985), Simel et al (1988), Cattail et al (1982), and Williams and Simel (1992).

LR+, positive likelihood ratio; LR—, negative likelihood ratio.

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