ISTH Bleeding Assessment Tool (ISTH-BAT)
ISTH bleeding assessment tool (Rodeghiero 2010; thresholds Elbatarny 2014): 14 bleeding domains each scored 0 to +4; the total is abnormal at ≥ 4 (adult male), ≥ 6 (adult female), or ≥ 3 (child).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Patient group
- Adult male (abnormal ≥ 4)
- Epistaxis
- 2
- Cutaneous / bruising
- 0
- Bleeding from minor wounds
- 0
- Oral cavity
- 0
- GI bleeding
- 0
- Hematuria
- 0
- Tooth extraction
- 0
- Surgery
- 3
- Menorrhagia
- 0
The other 5 values
- Postpartum hemorrhage
- 0
- Muscle hematoma
- 0
- Hemarthrosis
- 0
- CNS bleeding
- 0
- Other bleeding
- 0
Result: ISTH-BAT 5 — at or above the ≥ 4 adult male threshold: abnormal bleeding score.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Thresholds
- Abnormal ≥ 4 (adult male), ≥ 6 (adult female), ≥ 3 (child); supports evaluation for an inherited bleeding disorder.
What you enter
- Patient group (sets the abnormal threshold)
- Epistaxis (0–4)
- Cutaneous / bruising (0–4)
- Bleeding from minor wounds (0–4)
- Oral cavity (0–4)
- GI bleeding (0–4)
- Hematuria (0–4)
- Tooth extraction (0–4)
- Surgery (0–4)
- Menorrhagia (0–4)
The other 5 fields
- Postpartum hemorrhage (0–4)
- Muscle hematoma (0–4)
- Hemarthrosis (0–4)
- CNS bleeding (0, 3, or 4)
- Other bleeding (0–4)
How this is calculated
- Scoring
- Fourteen bleeding domains, each 0 to +4 (no negative scores).
Rodeghiero F, Tosetto A, Abshire T, et al. ISTH/SSC bleeding assessment tool: a standardized questionnaire and a proposal for a new bleeding score for inherited bleeding disorders. J Thromb Haemost. 2010;8(9):2063-2065. Thresholds: Elbatarny M, et al. Haemophilia. 2014;20(6):831-835. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.