9%20ECOGRAFIA%20ABDOMINAL%20COMO%20CUANDO%20DONDE

THE RENAL TRACT 183
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Morphological appearances This should include
an assessment of the relative echogenicity of the
cortex, medulla and renal sinus and
corticomedullary differentiation. Focal or diffuse
changes in echogenicity may be observed, but
are non-specific findings associated with
inflammation, infection or infarction.
Size Changes in renal size may be significant in
transplanted organs; it is useful to calculate the
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renal volume, circumference or area, rather
than just relying on the length.
PCS dilatation Even mild PCS dilatation may
be significant, as it may represent an early
obstructive process. The bladder should be
empty before assessing the PCS, to eliminate
physiological dilatation. Any degree of
hydronephrosis should be correlated with the
clinical findings and biochemistry;
A
B
C
D
Figure 7.24 (A) Perfusion within the transplanted kidney is easily displayed. A higher frequency may be used, as the
kidney is usually superficially situated in the iliac fossa. (B) Same kidney as (A). The Doppler sensitivity has been
increased to demonstrate tiny arcuate vessels at the periphery of the kidney. (C) The increased sensitivity of power
Doppler is valuable in demonstrating perfusion in the transplanted kidney. (D) Normal spectrum from the interlobar
renal artery, demonstrating good end-diastolic flow (EDF) (low resistance) with a vertical systolic upstroke.
(Continued)