At what age range does hypotension threshold change for infants?

The correct age range for the hypotension threshold change in infants is indeed between 1-12 months. Blood pressure norms in infants are not static and can vary significantly as they grow.

In infants, particularly those under 1 year of age, systolic blood pressure can be influenced by several factors, including gestational age and overall health, making it important to recognize that the definition of hypotension varies across different age groups. The threshold for hypotension is typically defined based on percentiles; for infants less than 1 year old, the lower threshold for systolic blood pressure can vary but has been established to be over 60 mmHg after 1 month of age.

By the time an infant reaches 1 year, their cardiovascular system is more developed, and this threshold can increase, leading to more established parameters for determining hypotension. Between 1 and 12 months, the physiological adjustments and development warrant a reevaluation of what is considered hypotensive. Hence, recognizing the age range of 1-12 months as critical is essential in practice for accurate assessment and treatment of pediatric patients in emergency situations.