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BP Under 3: Resources for Professionals

BP Under 3: Resources for Professionals

The 2017 American Academy of Pediatrics (AAP) Clinical Practice Guidelines recommends routine blood pressure (BP) measurement in children under 3 years of age who have conditions that place them at increased risk for hypertension. However, blood pressures are rarely done during well-child visits in this young, high-risk population. 

In response to this gap in routine screening, Children’s Hospital of Philadelphia (CHOP), in partnership with the Magical Mila Foundation, is advancing a standard-of-care approach to obtaining accurate BP measurements in children younger than 3 years who are at high risk of developing hypertension.

Conditions under which children < 3 years should have BP measured

Multiple clinical conditions are associated with an elevated risk of hypertension in this age group. Children are at higher risk if they have one of the following conditions. If your patient under the age of 3 has a condition placing them at increased risk for developing hypertension, it is crucial for them to have their blood pressure checked at every well-child visit.

High-risk conditions, per AAP guidelines*

  • History of prematurity:  < 32 weeks gestation or small for gestational age; very low birth weight; other neonatal complications that require intensive care; having an umbilical artery line 
  • Congenital heart disease (repaired or unrepaired) 
  • Recurrent urinary tract infections, hematuria or proteinuria 
  • Known renal disease or urologic malformations 
  • Family history of congenital renal disease 
  • Solid-organ transplant 
  • Malignancy or bone marrow transplant 
  • Treatment with drugs that are known to raise BP 
  • Other systemic illnesses associated with HTN (neurofibromatosis, tuberous sclerosis, sickle cell disease, etc.) 
  • Evidence of elevated intracranial pressure
  • Genetic conditions including fibromuscular dysplasia and Alagille, Turner and Williams syndromes

* Source: 

https://publications.aap.org/pediatrics/article/140/3/e20171904/38358/Clinical-Practice-Guideline-for-Screening-and

Tips for Accurate Measurement of BP Under 3

CHOP is committed to improving early and accurate BP assessment in high-risk pediatric populations under age 3. Early detection enables clinicians to distinguish true hypertension from transient elevations, initiate appropriate evaluation and treatment, and optimize long-term cardiovascular outcomes. 

Here are some essential tips to getting an accurate BP reading in children under the age of 3.

  • To minimize disruption to the child, take the BP as the first vital sign.
  • Distract the child as much as possible with help from his/her parent (bottle or pacifier, phone video, toys).
  • Attempt blood pressure on the right arm with no clothing underneath, using the appropriate cuff size
    • Cuff width should cover 2/3 of length from elbow to shoulder.
    • Length of bladder should cover 80% of arm circumference.
  • Allow the parent to take clothes off the right arm and place cuff if needed.
  • Make sure the child is supine or semi-supine (nestled & cozy) in a parent’s lap (or arms, if parent is standing). 
  • Child's arm should be at heart level.
  • We recommend attempting BP with an automated device twice. If that is unsuccessful, take a manual BP on the right arm using an auscultatory device.

To support consistent clinical decision-making, clear BP thresholds are needed to guide further evaluation and management for this high-risk population. The following values indicate BP measurements by age category (adapted from the 2017 guidelines) that should prompt additional evaluation.

What Age-Specific Blood Pressure Thresholds Require Further Evaluation?

Age (years)Blood Pressure Threshold (mmHg)
198 / 54
2100 / 56
3101 / 60
4102 / 62
5103 / 64
6105 / 66
7106 / 68
8107 / 69
9107 / 70
10108 / 72
11110 / 74
12113 / 75
≥13120 / 80

 

How to refer a patient

Hypertension Clinic at CHOP

If you have a patient who is hypertensive, contact the Hypertension Clinic at CHOP.

Pediatric Renovascular Hypertension Clinic at CHOP

If you have a patient who has renovascular hypertension, please contact the Pediatric Renovascular Hypertension Clinic at CHOP.

Join us in changing the standard of care!

Approximately 5% of the pediatric population under the age of 3 seen in primary care are at increased risk for hypertension. Are you interested in establishing a BP Under 3 initiative at your institution or practice? We can help your institution formalize and standardize the process of accurately obtaining and recording blood pressures in high-risk children under 3, so that all children who are at risk of hypertension receive the care they need. 

The BP Under 3 Initiative at CHOP is ensuring earlier detection, better continuity of care, and improved long-term cardiovascular outcomes for young children.  To join us in this effort, please contact our team at BPunder3@chop.edu

For more resources on high blood pressure in children, please visit the Magical Mila Foundation.

 

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