Is a respiratory rate of 20 breaths per minute normal?
Feb 16, 2022
Source: Cainiu Health
Dr. Guo Xiheng
Introduction
A respiratory rate of 20 breaths per minute is normal. Tidal volume is influenced by factors such as oxygen demand, metabolic byproducts, and pathological or physiological changes—for example, during exercise, increased oxygen demand and accelerated metabolism lead to deeper breathing. The respiratory rate refers to the number of breaths per minute under resting (quiet) conditions; it varies across different age groups.
Respiratory rate is a medical term describing the number of breaths taken per minute. One complete respiratory cycle—comprising one inhalation followed by one exhalation—is counted as a single breath, corresponding to one rise and fall of the chest. So, is a respiratory rate of 20 breaths per minute normal? Below, we address this question.
Is a respiratory rate of 20 breaths per minute normal?
Yes, a respiratory rate of 20 breaths per minute is considered normal.
Respiratory volume is influenced by multiple factors, including oxygen demand, metabolic activity, and physiological or pathological changes. For example, during physical exertion, increased oxygen demand and accelerated metabolism lead to deeper breathing. The normal respiratory rate refers specifically to the number of breaths per minute measured under resting (quiet) conditions. This rate varies with age: newborns and infants breathe most rapidly; the rate gradually declines with increasing age, while differences between males and females are minimal.
In infants, the respiratory rate may reach 20–30 breaths per minute—and occasionally up to 40 breaths per minute. In children, it averages approximately 20 breaths per minute. In adults, the typical range is 16–20 breaths per minute, generally not falling below 12 breaths per minute. A rate below 12 breaths per minute is termed bradypnea and may result from excessive use of anesthetics or sedatives, or from elevated intracranial pressure. A rate exceeding 20 breaths per minute is termed tachypnea and is commonly observed in patients with fever, pain, anemia, hyperthyroidism, or heart failure.
Sighing respiration is characterized by the intermittent insertion of a deep, audible breath accompanied by a sighing sound into an otherwise normal respiratory rhythm. Inhibitory respiration occurs when severe chest pain causes abrupt interruption of breathing, thereby suppressing respiratory movement. Cheyne-Stokes respiration is a cyclical, irregular breathing pattern in which both respiratory rate and depth progressively increase and then decrease, culminating in periods of apnea that alternate with resumed breathing.
The above provides an overview of whether a respiratory rate of 20 breaths per minute is normal. We hope this information is helpful to you.
