| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| Reversed Diastolic Flow | Reversed Diastolic Flow | Reversed Diastolic Flow | ||
| Systolic spike | Systolic spike | Systolic spike | ||
| No signals | No signals | No signals | ||
| Reduced upstroke/Pulsatility Index (PI) | Reduced upstroke/Pulsatility Index (PI) | Reduced upstroke/Pulsatility Index (PI) |