ULTRASOUND-GUIDED INTERVENTIONAL TECHNIQUE
Ultrasound-guided hydrodissection is a minimally invasive interventional technique designed to restore mobility between anatomical structures that have become restricted by compression, adhesions, scar tissue, or thickening of the surrounding tissues.
Unlike a conventional injection, the aim is not simply to deliver medication near the painful area. The defining principle of hydrodissection is the precise mechanical separation of tissue planes, allowing structures that should normally glide freely to regain space and mobility.
Many chronic musculoskeletal conditions involve loss of normal gliding and excursion between adjacent tissues. Hydrodissection works through a dual mechanism: Mechanical (physical separation and lysis of adhesions) and Pharmacological/Biological (anti-inflammatory, analgesic, or neuromodulatory effects depending on the injectate).
The technique is well established for peripheral nerve entrapments and selected musculoskeletal conditions:
Careful clinical and ultrasound evaluation is essential to determine the precise indication and appropriate injectate for each patient.
Carried out entirely under real-time ultrasound guidance. A fine needle (22-25G) is advanced to the target tissue plane, and fluid is injected gradually to create a visible separation ('halo sign') around the structure. The outpatient procedure takes only a few minutes, allowing immediate return to daily activities.
Real-time imaging allows continuous visualization of target nerves, tendons, fascia, the needle tip, adjacent blood vessels, and the precise spread of the injectate, ensuring high anatomical precision and safety.
Recovery is rapid. Most patients experience swift symptom relief with minimal restrictions typically recommended during the first 24–48 hours.
Complications are uncommon when performed with proper training and guidance. Contraindications include active local/systemic infection, severe bleeding disorders, relevant allergies, or progressive neurological deficits requiring surgical consultation.
The technique is supported by international clinical studies.
Read the full bibliography →
