The Tenex procedure is a minimally invasive, ultrasound-guided treatment that removes damaged tendon tissue through a tiny incision, typically less than half a centimeter. It was designed as an alternative to open surgery for people with chronic tendon pain that hasn’t responded to conservative treatments like rest, physical therapy, or injections. The procedure takes roughly 15 to 20 minutes, uses only local anesthesia, and is performed in an outpatient setting.
How the Tenex Device Works
The system uses a needle-like instrument called the TX MicroTip, which delivers focused ultrasonic energy to break apart and emulsify damaged tendon tissue. What makes it different from simply cutting with a scalpel is selectivity: the ultrasonic energy targets diseased, disorganized tissue while leaving healthy tendon fibers intact. As the device breaks down the damaged tissue, saline irrigation flushes the area and the debrided material is simultaneously aspirated (suctioned out) through the same instrument.
The entire process happens under continuous, real-time ultrasound imaging. The physician watches the needle tip on a monitor throughout, which allows precise targeting of the specific area of damage. The TX system received FDA clearance in 2016.
Conditions It Treats
Tenex is used for chronic tendinopathy, the term for tendon degeneration that causes persistent pain and stiffness. It has been studied and applied across a wide range of locations in the body, including the lateral elbow (tennis elbow), medial elbow (golfer’s elbow), Achilles tendon, patellar tendon, rotator cuff, plantar fascia, hamstring, gluteal tendons, and the iliotibial band.
Tennis elbow is by far the most commonly treated condition. In a systematic review of 20 studies on percutaneous tenotomy for tendinopathies, 16 focused on lateral elbow tendinopathy. Achilles tendinopathy and plantar fasciitis (plantar fascia pain) have also been specifically studied using the Tenex device, though with fewer published trials so far.
The procedure is generally considered for patients who have tried conservative treatments for several months without adequate relief. It fills a gap between noninvasive options and traditional open surgery.
What Happens During the Procedure
The Tenex procedure is performed in an outpatient clinic or procedure suite, not an operating room. You stay fully awake throughout. No sedation is required.
The area around the affected tendon is numbed with a local anesthetic, typically 5 to 10 milliliters depending on the location and your comfort level. Once the area is numb, the physician makes a small skin incision of about 5 millimeters (roughly a quarter inch) using a surgical blade. This incision is always made in line with the tendon fibers to avoid cutting across them.
The physician then inserts the TX device through the incision and advances it to the damaged area of the tendon under live ultrasound guidance. The device’s ultrasonic tip breaks up the diseased tissue, which is irrigated with saline and suctioned out in real time. The entire procedure from start to finish typically takes under 20 minutes. Afterward, the incision is small enough that it often requires only an adhesive bandage or a single stitch.
Advantages Over Open Surgery
Compared to traditional open tenotomy, which requires a larger incision and sometimes general anesthesia, the Tenex procedure offers several practical advantages. The incision is dramatically smaller, which translates to less postoperative pain, lower infection risk, and a faster return to daily activities. Because only local anesthesia is used, you avoid the risks and recovery time associated with sedation or general anesthesia.
Open surgery for conditions like tennis elbow can involve weeks of immobilization and months before full activity. The Tenex approach, by contrast, preserves the surrounding healthy tissue and tendon structure, which gives the body a head start on healing.
Recovery Timeline
Recovery after a Tenex procedure generally takes 4 to 12 weeks, depending on which tendon was treated and how severe the damage was. Physical therapy is a standard part of the rehabilitation process, and your provider will outline a progressive plan that gradually increases activity levels.
In the early days after the procedure, you can expect some soreness and mild swelling at the treatment site. Activity restrictions are common during the first few weeks, with incremental progression as healing advances. For people looking to return to sports or intense physical activity, the typical timeline is about 10 to 12 weeks after the procedure. Each stage of rehab builds on the previous one, so following the prescribed progression matters for the best outcome.
Who Is a Good Candidate
The ideal candidate for a Tenex procedure is someone with chronic tendon pain, typically lasting at least three to six months, that hasn’t improved with conservative measures like physical therapy, bracing, anti-inflammatory medications, or corticosteroid injections. Imaging (usually an ultrasound or MRI) needs to confirm that there is actual structural damage or degeneration in the tendon, not just inflammation.
People with full-thickness tendon tears generally are not candidates, as Tenex is designed to remove damaged tissue within a tendon that still has intact structure. It works best when the problem is localized degeneration rather than a complete rupture. Your physician will use diagnostic ultrasound to evaluate whether the pattern of damage is appropriate for this approach.
What Results to Expect
Most published research on the Tenex procedure shows significant pain reduction and functional improvement, particularly for lateral elbow tendinopathy, where the largest body of evidence exists. Studies on Achilles tendinopathy and plantar fasciitis treated with the Tenex device have also reported positive outcomes, though the number of trials remains smaller.
It is worth noting that results vary by location and severity. Tendon problems in weight-bearing areas like the Achilles or plantar fascia can take longer to fully resolve than those in the elbow. Some patients experience near-complete relief, while others see meaningful improvement but not total resolution of symptoms. A realistic expectation is significant pain reduction and improved function over the 3- to 6-month period following the procedure, with physical therapy playing a key role in the final outcome.