STONE Score

Gender
1. Score 0: Female Gender
2. Score 2: Male Gender
Duration
1. Score 0: Lasting >24 hours
2. Score 1: Lasting 6 to 24 hours
3. Score 3: Lasting <6 hours
Nausea and Vomiting
1. Score 0: None
2. Score 1: Nausea only
3. Score 2: Nausea and Vomiting
Hematuria (on Urine Dipstick)
1. Score 0: None
2. Score 3: Present
Race (Optional)
1. Score 0: Black
2. Score 3: Non-Black

Score 0 to 5: Low Risk for Stone (9.2%)
1. Alternative diagnosis is more likely
Score 6 to 9: Moderate Risk for Stone (51.3%)
1. Consider expectant management without CT if Hydronephrosis on Bedside Ultrasound (after hydration) in otherwise healthy patient
2. Bedside Ultrasound may also be used to help exclude other important diagnoses (e.g. AAA, acute cholelithaisis)
Score 10 to 13: High Risk for Stone (88.6%)
1. Consider expectant management without CT in pain-controlled patients at low risk for alternative diagnosis
2. Bedside Ultrasound may increase accuracy by identifying Hydronephrosis and excluding alternative diagnoses
3. Low dose CT may be considered if stone localization and size is needed