Nerves need to glide freely through tissue planes. When adhesions trap them, mechanical pain results. Hydrodissection restores normal movement without surgery.
Peripheral nerves are designed to glide. As your body moves, nerves slide within fascial tunnels and between tissue planes—accommodating the changing positions of muscles, tendons, and joints. This gliding motion is essential for normal nerve function. When a nerve loses its ability to glide—trapped by adhesions, scar tissue, fascial thickening, or muscular compression—it becomes mechanically irritated with every movement.
Nerve entrapment produces a characteristic pattern of symptoms: burning, shooting, or electrical pain that follows the nerve's distribution, numbness or tingling in the nerve's sensory territory, and pain that worsens with specific movements or positions that tension the trapped nerve. These symptoms persist because the structural problem—the entrapment—is not addressed by rest, medication, or conventional physical therapy.
Entrapment is a mechanical problem that requires a mechanical solution. Anti-inflammatory medications may reduce perineural inflammation temporarily, but they do not free a trapped nerve. Nerve blocks silence the signal but do not remove the compression. Surgery can release an entrapped nerve but involves tissue disruption and recovery time. Hydrodissection offers a minimally invasive alternative: a precisely delivered fluid injection that mechanically separates the nerve from the tissue compressing it, restoring normal glide without surgery.
The technique is elegant in its simplicity. Under high-resolution ultrasound guidance, we identify the entrapped nerve and visualize the point of compression. A small-gauge needle is advanced to the fascial plane surrounding the nerve—not into the nerve itself, but into the tissue space around it.
We then inject a solution: typically 5% dextrose in saline with a small amount of local anesthetic—in a controlled, deliberate manner. The fluid fills the tissue plane and physically dissects the nerve away from the structures compressing it. On ultrasound, we watch the nerve separate from adhesions and surrounding tissue in real time. The nerve, previously tethered, begins to move freely within its fascial envelope.
The dextrose component serves a dual purpose: it provides an osmotic gradient that maintains the fluid space for hours after injection (longer than saline alone), and it has mild proliferant properties that promote healthy tissue remodeling around the nerve. In some cases, we add platelet-rich plasma to the hydrodissection solution to amplify the healing response in the perineural tissue.
Nerve hydrodissection is an office-based procedure performed entirely under ultrasound guidance. No sedation is required. The procedure begins with a diagnostic ultrasound examination to confirm the nerve entrapment, identify the exact point of compression, and plan the approach.
The skin is cleaned and a small amount of local anesthetic is injected at the needle entry site. Under continuous ultrasound visualization, a small-gauge needle is advanced to the tissue plane surrounding the entrapped nerve. The hydrodissection solution is injected slowly while we watch the nerve separate from compressing tissue on the ultrasound screen.
The entire procedure takes 15-30 minutes. Most patients notice immediate improvement in symptoms: the combination of mechanical nerve release and local anesthetic provides rapid relief. You can return to normal activities the same day, with mild soreness at the injection site resolving within 24-48 hours. We reassess nerve mobility on follow-up ultrasound to confirm that glide has been restored.
Surgical nerve release (neurolysis) is effective but involves general or regional anesthesia, tissue dissection, recovery time, and the risk of scar tissue formation that can re-entrap the nerve. Hydrodissection achieves the same mechanical goal—freeing the nerve from compression—through a minimally invasive approach with minimal tissue disruption, no recovery downtime, and the ability to repeat if needed.
For most peripheral nerve entrapments, hydrodissection should be attempted before surgical release is considered. The procedure is low-risk, well-tolerated, and effective. When it works—and it frequently does—it eliminates the need for surgery entirely.
Trapped nerves produce mechanical pain that requires mechanical release. Let's discuss whether hydrodissection can restore normal nerve glide in your case.