Doppler Flow in Testes* 1
| Testicular Volume | % detectable color flow |
| < 1 cc | 70 (capsular arteries)
40 (central arteries) |
| > 1 cc | +/- 100 (central&capsular) |
* - waveforms typically low resistance, high diastolic flow.
- compare for symmetry
- lack of flow may be due to gain settings/high wall filter/high PRF etc.2
Reference:1. Atkinson GO, Patrick LE, Ball TI, et al. The normal and abnormal scrotum in children: evaluation with color doppler sonography. AJR 1992;158:613-617
2. Siegel MJ, Pediatric Sonography, 2nd Ed. 1995 Raven Press