I would suggest ultrasound is contraindicated in this case. You must consider the patients ability to understand a warning and be able to give feedback for any type of EPA at this age. Furthermore the skeleton is still forming at this time.

The is a basic list of contraindications at www.electrotherapy.org/contraindications.htm

Some of these include but are not limited to the following:

CONTRAIDICATION
• Undiagnosed pain
• Cancer
• Active tuberculosis
• Psoriasis
• Decreased circulation
• Infection
• Pregnancy
• Central nervous system tissue
• Joint cement (cannot use continuous mode, but may use pulsed mode 50% or less)
• Plastic components
• Pacemakers
• Thrombophlebitis
• Uncontrolled bleeding or blood-thinning medication (coumadin)
• Eyes
• Reproductive organs
• Heart

PRECAUTIONS
• Acute inflammation (use non-thermal settings only)
• Epiphyseal plates (use pulsed, low intensity <0.5w/cm2)
• Decreased sensation (esp. with thermal US)
• Over implanted materials: metal reflects 90% of incident US; plastic respond like periosteum and it absorbs a large % of US; generally safe if the sound head is kept moving.