ESAR
Pronunciation: EE-sar
Also written as: ESAR — Energy-Storing-and-Return
Acronym for Energy-Storing-and-Return, describing a class of prosthetic foot designs that store elastic energy during loading and release it at toe-off to facilitate propulsion.
Full Definition
ESAR (Energy-Storing-and-Return) feet are prosthetic foot components constructed from carbon-fibre or composite materials that deform under load to absorb kinetic energy, then recoil to assist forward propulsion at the end of the stance phase. They are distinguished from the older SACH (Solid Ankle Cushioned Heel) feet by their dynamic biomechanical behaviour and suitability for active ambulators. ESAR feet are coded under specific L-codes in the DMEPOS billing system and require clinical justification aligned with the patient's K-level. Editors should render the acronym as 'ESAR' (all caps, no periods) and expand it on first use in formal documents. The full expanded form is hyphenated: 'Energy-Storing-and-Return.'
Usage
Usage note: Always expand on first use in formal documents. The expanded form 'Energy-Storing-and-Return' requires hyphens throughout when used as a compound modifier.
In Context
- "The ESAR foot selected for this patient was documented as appropriate for a K3 active community ambulator engaged in recreational walking." — Certificate of Medical Necessity
- "On first use, expand ESAR to 'Energy-Storing-and-Return' and include the acronym in parentheses; thereafter, 'ESAR' alone is sufficient." — Journal article manuscript