The Clinical Disease Severity Score (CDSS) can be used to determine the severity of a respiratory syncytial virus (RSV) infection in an infant or child.
Patient selection: infant or child with RSV
Parameters:
(1) transcutaneous oxygen saturation in percent
(2) respiratory rate in breaths per minute
(3) retractions
(4) chest auscultation
(5) activity
Parameter
Finding
Points
oxygen saturation
> 95% on room air
0
92 to 95%
1
< 92% or requires supplemental oxygen
2
intubated OR CPAP or FIO2 > 35%
3
respiratory rate
< 6 months and < 40 bpm
0
< 6 months and 41-55 bpm
1
< 6 months and 56-70 bpm
2
< 6 months and > 70 bpm
3
>= 6 months & < 30 bpm
0
>= 6 months & 31-45 bpm
1
>= 6 months & 46-60 bpm
2
>= 6 months & > 60 bpm
3
retractions
none
0
mild subcostal
1
subcostal and intercostal
2
marked subcostal, intercostal, suprasternal
3
chest auscultation
normal
0
crackles, rhonchi
1
any wheezing
2
expiratory/inspiratory wheezing without stethoscope
3
activity
normal, alert
0
fussy, decreased oral intake
1
nasogastric feeds, IV fluids
2
intubated
3
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 15
Score
Disease Severity
0 to 5
mild
6 to 10
moderate
11 to 15
severe
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