From the Guidelines
Normal vital signs for a 3-month-old infant include a heart rate of 100-160 beats per minute, respiratory rate of 30-60 breaths per minute, and a systolic blood pressure between 70 mmHg, as defined by low systolic blood pressure for children less than 70 mm Hg from 1 month to 1 year 1. When evaluating pediatric vitals at 3 months, it's essential to consider the age-specific ranges to accurately assess the infant's health.
- Heart rate: 100-160 beats per minute, with normal heart rate ranges from 80-120 beats/minute at age 3 years not being applicable yet, as this range applies after age 3 years 1.
- Respiratory rate: 30-60 breaths per minute, as respiratory compromise is more likely than hypotension or shock in infants and children 1.
- Systolic blood pressure: between 70 mmHg, considering that low systolic blood pressure for children is defined as less than 70 mm Hg from 1 month to 1 year 1. These parameters are critical in assessing the infant's overall health and development, and significant deviations from these ranges may indicate underlying health issues, such as anaphylaxis, which can manifest with sudden respiratory symptoms, reduced blood pressure, or other systemic signs 1. Regular monitoring of these vital signs during well-child visits helps track normal growth and development, and it's crucial to measure them when the infant is calm, as crying or agitation can temporarily elevate heart rate and blood pressure.
From the Research
Pediatric Vitals at 3 Months
There are no research papers to assist in answering this question, as the provided studies focus on obstructive sleep apnea in adults and do not provide information on pediatric vitals at 3 months.
- The studies 2, 3, 4 discuss the diagnosis, management, and treatment of obstructive sleep apnea in adults.
- Study 5 reviews the uses and mechanisms of apnoeic oxygenation, but does not provide information on pediatric vitals.
- Study 6 is unrelated to the topic of pediatric vitals, discussing familial endocrine adenomatosis.