Sohn et al reported a nomogram for predicting poor neurological outcome for a patient having an out-of-hospital cardiac arrest.
The authors are from Hallym University in South Korea.
Patient selection: out-of-hospital cardiac arrest, with patients receiving therapeutic hypothermia
Parameters:
(1) age in years, from 10 to 100
(2) previous good CPC (cerebral performance category)
(3) diabetes
(4) renal disease
(5) witnessed
(6) EMS shockable rhythm
(7) EMS airway placed
(8) ED shockable rhythm
(9) time to return of spontaneous circulation (ROSC) in minutes
(10) cardiac arrest
points for age =
= (0.7033 * (age)) - 7.033
points for time to ROSC =
= 0.7692 * (minutes)
|
Parameter
|
Finding
|
Points
|
|
previous good CPC
|
no
|
31.6
|
|
|
yes
|
0
|
|
diabetes
|
no
|
0
|
|
|
yes
|
7.1
|
|
renal disease
|
no
|
0
|
|
|
yes
|
12.2
|
|
witnessed
|
no
|
6.3
|
|
|
yes
|
0
|
|
EMS shockable rhythm
|
no
|
8.7
|
|
|
yes
|
0
|
|
EMS airway placed
|
no
|
0
|
|
|
yes
|
7.1
|
|
ED shockable rhythm
|
no
|
16.8
|
|
|
yes
|
0
|
|
cardiac arrest
|
no
|
24.5
|
|
|
yes
|
0
|
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score 275.8
value of X =
= (0.07837 * (score)) - 5.893
probability of a poor neurological outcome =
= 1 / (1 + EXP((-1) * X))
