The normal range for respiratory rate (RR) measured by an oximeter varies depending on age and other factors. However, generally accepted ranges exist.
Understanding Respiratory Rate (RR)
Respiratory rate, or RR, refers to the number of breaths a person takes per minute. It's a vital sign monitored by pulse oximeters, along with blood oxygen saturation (SpO2). Consistent monitoring can provide insights into overall health.
Normal RR Ranges
-
Adults: A commonly cited normal RR range for adults is 12 to 20 breaths per minute. However, studies show that ranges can be broader. One study found that for 95% of adults over 65, the RR ranged from 12 to 28 breaths per minute, and for 99%, it was 8.5 to 32 breaths per minute. (Source: Normal Respiratory Rate and Peripheral Blood Oxygen Saturation in the Elderly Population)
-
Children and Infants: Normal RR varies significantly with age in children and infants. These ranges are not typically displayed directly on an oximeter but should be assessed based on established pediatric guidelines.
-
Factors Affecting RR: Keep in mind that factors like physical activity, altitude, and underlying health conditions can influence RR. An RR above 24 breaths per minute is generally considered abnormally high, potentially indicating a problem. (Source: Pulse Oximetry – 3 Important Points to Understand Usage and Interpretation)
Interpreting Oximeter Readings
While an oximeter displays RR, it's crucial to consider it alongside SpO2 (oxygen saturation). Abnormal RR may require further medical evaluation, especially when accompanied by low SpO2.
- Normal SpO2 Range: Generally, a healthy SpO2 reading is between 95% and 100%. Readings between 90.1% and 94.9% are considered borderline, and values below 90% indicate low blood oxygen levels, requiring prompt medical attention. (Source: Pulse Oximeter - Physiopedia)
It's important to note that oximeter readings should be interpreted within the context of a patient's overall clinical picture and not relied upon solely for diagnosis.
