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Calculator: Michigan Risk Score (MRS) for PICC-related thrombosis in hospitalized nonpregnant adults


Calculator: Michigan Risk Score (MRS) for PICC-related thrombosis in hospitalized nonpregnant adults

 
Another central venous catheter present at the time of PICC placement?

Yes (1 point)

No (0 points)
WBC >12.0 X 103/microL [12.0 X 109/L]?

Yes (1 point)

No (0 points)
Number of lumens in the PICC?

1 lumen (0 points)

2 lumens (2 points)

3 to 4 lumens (3 points)
History of VTE

Never (0 points)

Yes, >30 days prior (2 points)

Yes, within 30 days (3 points)
Active cancer: treated with chemotherapy or by hospitalization

Yes (2 points)

No (0 points)

 
Important: Inputs must be complete to perform calculation.

 
Total criteria point count:
 

 

MRS interpretation

 
Total points Risk class Probability (%) VTE if PICC inserted
0 I 0.9%
1 to 2 II 1.6%
3 to 4 III 2.7%
5 to 10 IV 4.7%

 
Notes
  • The MRS for PICC-related thrombosis in hospitalized nonpregnant adults has not been validated in surgical patients nor in patient undergoing surgery with a PICC.
  • PICC: peripherally inserted central catheter; WBC: white blood cell count; VTE: venous thromboembolism.

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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