Varicocele grading on color Doppler can be done variably. The most elaborate and widely-accepted grading was given by Sarteschi, as below.
For a general discussion of this condition refer to the article: varicocele.
Evaluation
baseline greyscale study in supine position and measure the diameters of veins, as well as the total diameter of the plexus
next, do color Doppler interrogation and see reflux during Valsalva maneuver
repeat in standing position
Grading of varicocele
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grade I
no dilated intrascrotal veins
reflux in spermatic cord veins of the inguinal region during Valsalva maneuver
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grade II
prominent veins at upper pole of testis
reflux at upper pole veins during Valsalva maneuver
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grade III
no major dilatation in supine position
dilated veins up to lower pole of testis seen only in standing position
reflux at lower pole veins during Valsalva maneuver
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grade IV
dilated veins even in supine position
reflux during Valsalva maneuver
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grade V
dilated veins
reflux without Valsalva maneuver
Classification according to Sarteschi 1
grade I: reflux at the level of groin only during the Valsalva maneuver, without scrotal deformation or testicular hypotrophy
grade II: reflux at the level of the proximal segment of the pampiniform plexus only during the Valsalva maneuver, without scrotal deformation or testicular hypotrophy
grade III: reflux in the distal vessels at the level of lower scrotum only during the Valsalva maneuver, without scrotal deformation or testicular hypotrophy
grade IV: spontaneous reverse flow, increasing during the Valsalva maneuver, with scrotal deformation and possible testicular hypotrophy
grade V: resting reflux in the dilated pampiniform plexus, possibly increasing during the Valsalva maneuver, always accompanied by testicular hypotrophy