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. Author manuscript; available in PMC: 2022 Nov 1.
Published in final edited form as: Pediatr Emerg Care. 2021 Nov 1;37(11):560–569. doi: 10.1097/PEC.0000000000001743

Table 1:

Modified-NHLBI Asthma Severity Classification*

Mild Moderate Severe Critical
Level of Alertness Alert Verbal Painful Unresponsive
Respiratory Effort Normal Labored Fatigued Absent
Respiratory Rate
(breaths per minute)
 2-5 years 10-29 30-40 >40 <10
 6-11 years 10-24 25-35 >35 <10
 12-18 years 10-19 20-30 >30 >10
Pulse Rate
(beats per minute)
 2-5 years 100-119 120-140 >140 <100
 6-11 years 60-109 110-130 >130 <60
 12-18 years 60-99 100-120 >120 <60
Pulse Oximetry > 95% 90-95% 80-89% <80%

NHLBI = National Heart Lung and Blood Institute

*

Derived from Reference 7 & 21