High velocity low amplitude thrust (HVLA) is a technique used in osteopathic medicine to treat somatic dysfunction.

Technique

---

The physician begins by making a three-plane diagnosis of somatic dysfunction. The physician positions the patient at the "feather edge" of the restrictive barrier--the pathologic end of range of passive motion which is encountered before the anatomical end of range of motion. The physician then vectors a rapid, low-amplitude impulse into the barrier. This small, quick impulse "pops" through the barrier, restoring range of motion and relieving somatic dysfunction. Successful HVLA may or may not cause audible "cracking" of the back at the targeted vertebral segment.

Sources

---

• Ward, Robert C. et al; Foundations for Osteopathic Medicine (2nd ed.). Philadelphia: Lippincot Williams and Wilkins. ISBN 0-7817-3497-5.