Viewing live Pulse Rate and Oxygen Saturation levels requires the Health Notifications function to be enabled. The readings show real-time information about the baby’s Pulse Rate and Oxygen Saturation.
When the Health Notifications function is enabled, Dream Sock will notify Caregivers to critical levels of blood Oxygen Saturation in the baby wearing the Sock with Sensor which may require immediate attention. Dream Sock will also notify caregivers to extremely low or high Pulse Rates that require attention. These are High Priority Notifications.
The Owlet Dream App will also display Oxygen Saturation and Pulse Rate readings so that Caregivers can check on the status of their child while the Sock and Sensor are worn and monitoring is on. This section is intended to help a Caregiver understand the information on Pulse Rate and Oxygen Saturation they see on the Owlet Dream App when the Health Notifications function is enabled.
The Owlet Dream App has tooltips that can be used as a quick reference by tapping the help question mark. 
Pulse Rate
Infant Pulse Rates are much faster than those of adults. There are ranges of Pulse Rates which are generally seen when infants are awake and relaxed, seen in the table below.
Pulse Rates in Healthy Infants By Age*
| Age | Typical Pulse Rate range - Awake Infant |
| 0 to 3 months | 123-164 |
| 3 to <6 months | 120-159 |
| 6 to <9 months | 114-152 |
| 9 to <12 months | 109-145 |
| 12 to <18 months | 103-140 |
| 18 to 24 months | 98-135 |
*Data from: Fleming S, Thompson M, Stevens R, et al. Normal ranges of heart rate and respiratory rate in children from birth to 18 years of age: A systematic review of observational studies. Lancet 2011; 377:1011
While these are typical ranges for awake and relaxed infants, Pulse Rates can vary with activity.
For example:
- It is very common for infants to have Pulse Rates slower than the typical ranges when they are in deep sleep.
- It is very common for infants to have Pulse Rates faster than the typical ranges when they are crying or when they have a fever.
After you set up Dream Sock and connect the App, it is good to get to know how the baby’s Pulse Rate normally behaves during routine activities. This will help you recognize anything that is significantly different from the baby’s normal range in the future.
For example, the baby may normally have a Pulse Rate of 120 beats per minute when sleeping. If you see a Pulse Rate of 180 beats per minute, the system will not notify you, but you still may want to check on the baby for any signs of discomfort or illness.
Things to check for may include:
-Color of the infant’s lips (are they a normal pink, or blue?)
-Breathing (fast or labored?)
-Alertness level (i.e. does the baby respond to your voice or touch?)
-Temperature (i.e., does the baby feel hot or cool to touch?)
You should also check the baby’s sleep position and environment to ensure there are no items which may obstruct the baby’s breathing.
Even if you have not received a notification, if you have concerns about the child’s health, it is advisable to contact the child’s healthcare provider.
Oxygen Saturation Levels
Oxygen Saturation levels in healthy infants are similar to adults.
Typically, you will see Oxygen Saturation levels over 90% no matter what activity a baby is doing. Oxygen Saturation levels can vary slightly (within 5%) of the infant’s baseline. Infants at high altitude may have slightly lower Oxygen Saturation levels than at sea level, but should still be higher than 90%. Readings from Dream Sock should only be used as an estimate of blood Oxygen Saturation.
After you set up Dream Sock and connect the Owlet Dream App, it is good to get to know the baby’s typical Oxygen Saturation levels. Dream Sock will notify if the Oxygen Saturation level falls to 80% or below.
However, there may be times when an infant has an Oxygen Saturation level less than 90% but does not yet reach the notification limit of 80%.
The most common reason for this to happen is when a baby is getting sick with a virus that affects their breathing. An observation of an Oxygen Saturation level between 80 and 90% which lasts for more than a few seconds at a time is a reason to check on the baby for signs of breathing difficulty, including nasal congestion, fast or labored breathing, and wheezing.
Things to check for may include:
-Color of the infant’s lips (are they pink or blue?)
-Breathing (fast or labored?)
-Alertness level (i.e. does the baby respond to your voice or touch?)
-Temperature (does the baby feel hot to touch?)
Even if you have not received a notification, if you have concerns about the child’s health, it is advisable to contact the child’s healthcare provider.
Consider accuracy limitations when using Dream Sock. For example, a reported Oxygen Saturation value of 90% may represent an arterial blood saturation of 87 - 93%. Pulse oximeters tend to be less accurate when Oxygen Saturations are less than 80%, at lower levels of perfusion, and during periods of weak or noisy signals. Be aware that multiple factors can affect the accuracy of readings.