haematology general-medicine

Michigan PICC-Associated Thrombosis (MAT) Score

Predicts risk of PICC-associated upper extremity DVT in hospitalised patients.

Score interpretation

Class I — PICC-DVT 0.9 % 0

Michigan Risk Score 0: symptomatic PICC-DVT 0.9 % (Chopra 2017).

→ Routine PICC care; use the fewest lumens and smallest catheter needed.

Class II — PICC-DVT 1.6 % 1–2

Michigan Risk Score 1–2: symptomatic PICC-DVT 1.6 %.

→ Routine PICC care; single lumen unless more are essential.

Class III — PICC-DVT 2.7 % 3–4

Michigan Risk Score 3–4: symptomatic PICC-DVT 2.7 %.

→ Review the indication and lumen number; consider an alternative device where appropriate (MAGIC).

Class IV — PICC-DVT 4.7 % 5–10

Michigan Risk Score ≥ 5: symptomatic PICC-DVT 4.7 % (about 5-fold class I).

→ Weigh the PICC against alternative venous access; if placed, single lumen and smallest gauge, and monitor for arm swelling or pain.

Interpretation bands for the MAT Score. Apply clinical judgement and local guidance.

Chopra V, Kaatz S, Conlon A, et al. The Michigan Risk Score to predict peripherally inserted central catheter-associated thrombosis. J Thromb Haemost. 2017;15(10):1951-1962.
Chopra V et al. The Michigan Appropriateness Guide for Intravenous Catheters (MAGIC): results from a multispecialty panel using the RAND/UCLA appropriateness method. Ann Intern Med. 2015;163(6 Suppl):S1–S40.

Curated clinical cross-links plus same-class fallbacks.

Calculators

Drugs

Pathways

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.