Estimated/Expected Peak Expiratory Flow (Peak Flow)

Calculates expected peak flow to help quantify asthma exacerbation severity.

Children: PEFR = ((Height in cm - 100) * 5) + 100
Adult Men: ((Height * 5.48) + 1.58) - (Age * 0.041)) * 60
Adult Women: (((Height * 3.72) + 2.24) - (Age * 0.03)) * 60

Balasubramanian S, Ravikumar NR, Chakkarapani E, Shivbalan SO. Peak expiratory flow rate in children--a ready reckoner. Indian Pediatr. 2002 Jan;39(1):104-6. PubMed PMID: 11805367.

Knudson RJ, Lebowitz MD, Holberg CJ, Burrows B. Changes in the normal maximal expiratory flow-volume curve with growth and aging. Am Rev Respir Dis. 1983 Jun;127(6):725-34. PubMed PMID: 6859656.

Posted in: Pulmonology • Respiratory