Normal respiratory rate varies with age:
Adults In a quiet state when lying down about 14 to 16 times / minute, sitting about 16 to 18 times / minute, standing about 18 to 20 times / minute, women are slightly faster 2 to 4 times / minute; newborns 40 to 50 times / minute; 1 year of age, 30 to 40 times / minute; 2 to 3 years old 25 to 30 times / min; 4 ~ 7 years old 20 ~ 25 times; 8 ~ 14 years old about 20 times / min; 15 years old and above the same as adults; the elderly about 16 ~ 20 times / min.
Respiratory rate below 12 beats per minute is called bradypnea, and more than 24 beats per minute is called tachypnea. The former is commonly associated with decreased metabolic rate, anesthesia, shock, and increased intracranial pressure; the latter is mainly associated with pneumonia, pulmonary embolism, pleurisy, bronchial asthma, congestive heart failure, hypermetabolism, and neuropsychiatric disorders, etc.
The former is commonly associated with decreased metabolic rate, anesthesia, shock, and increased intracranial pressure; the latter is mainly associated with pneumonia, pulmonary embolism, pleurisy, bronchial asthma, congestive heart failure, hypermetabolism, and neuropsychiatric disorders.