ZedScore calculates z-scores for paediatric echocardiography measurements, for healthcare professionals who work with children.

Enter height and weight, open a category and type your measurements. Each one shows its z-score and expected range straight away. There's no patient to create first.

WHAT IT COVERS
• 9 categories: aortic arch, aortic root, coronary arteries, pulmonary arteries, left chambers, right chambers, M-mode, valves and IVC
• 8 published methods: Daubeney 1999, Pettersen 2008, McCrindle 2007, Olivieri 2009, Dallaire 2011, Cantinotti 2014, Cantinotti 2017 and Lopez 2017
• 7 BSA formulas: Haycock, DuBois, Mosteller, Gehan-George, Boyd, Dreyer-Ray and Meban
• Centimetres or inches, kilograms or pounds

BUILT FOR A BUSY LIST
• Search for a structure by name
• Compare methods for the same structure
• A warning when BSA is outside the range the app uses for a method
• A prompt when a study used a different BSA formula from the one selected
• Copy results as text, including the method and BSA formula

PRIVATE BY DESIGN
• Calculations work without internet, with no account, ads or analytics. Internet is used only to confirm purchases
• Saving uses a short label such as initials or a file number
• Saved results stay on your device

ZEDSCORE PLUS
A one-time purchase, with no subscription:
• Save patients and visits, and reload a visit to measure again
• Dark and automatic theme

ZEDSCORE PRO
Yearly with a 7-day free trial, or a one-time lifetime purchase. Everything in Plus, and:
• How to measure each structure as its study did, with drawings
• Enter measurements on a drawing of the echo view
• Kawasaki disease: the AHA coronary artery level for each segment, from the z-scores the AHA definitions use
• See the size that keeps the same z as the child grows
• Practise placing calipers, with feedback

Every calculation stays free.

Full references are listed in the app.

IMPORTANT
ZedScore is a calculation aid for qualified healthcare professionals. ZedScore is not a medical device. It does not diagnose, treat, cure or prevent any medical condition. Check important results against the original publications and use your clinical judgement. Reference equations come from specific study populations and may not apply to every child.