Liu et al reported a model for predicting thrombosis involving an intravascular catheter in a patient with cancer. This can help to identify a patient who may benefit from more aggressive management. The authors are from multiple hospitals in China.
Patient selection: cancer patient with an intravascular catheter
Parameters:
(1) sex
(2) type of cancer
(3) type of intravenous catheter
(4) position of catheter tip
(5) anticoagulation or antiplatelet therapy
(6) chemotherapy
Parameter
Finding
Points
sex
female
0
male
2.5
type of cancer
urogenital
0
breast
4.2
hematological
8.2
gastrointestinal
9.4
other
6.5
type of IV catheter
central
0
PICC
4.6
position
proper
0
above T6 to T8
1.5
below T6 or T8
1.9
ectopic
7.4
anticoagulation
no
7.1
yes
0
chemotherapy
no
2.25
yes
0
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 33.5
• The higher the score the greater the risk of thrombosis.
value of X =
= (0.1866 * (score)) - 5.637
probability of thrombosis =
= 1 / (1 + EXP((-1) * X))
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