Five Trials, 389 Patients, and What Threaded Carpal Tunnel Release Looks Like in 2026

The Study

Ezenwanne et al. conducted a systematic review and meta-analysis under PRISMA 2020 reporting standards, registered prospectively on PROSPERO. The clinical question was narrow: among adults (18+) with a confirmed CTS diagnosis, how do outcomes from ultrasound-guided threaded carpal tunnel release compare with the broader category of minimally invasive surgical techniques?

The eligibility criteria included randomized controlled trials, cohort studies, and case series that examined either TCTR or any non-thread MIS technique and reported at least one outcome among pain, sensation, or function. Open carpal tunnel release (the traditional larger-incision surgery) was not the comparator. The interest here is in the newer percutaneous and small-incision space, not the legacy procedure.

Five studies met inclusion criteria, contributing 389 patients in total. Mean follow-up across the included studies was approximately 8 months for the symptom severity and functional outcome measures, and approximately 3.25 months for pain. The two most common patient-reported instruments in the included studies were the Boston Carpal Tunnel Questionnaire's Symptom Severity Scale (SSS) and Functional Status Scale (FSS).

What They Found

Both treatment categories produced clinically meaningful within-group improvements in pain, sensation, and function across the available follow-up windows.

The within-group difference appears to favor the threaded approach for symptom severity. Subgroup analysis directly comparing TCTR with MIS, however, did not reach statistical significance on any of the measured outcomes. The authors interpret the totality of the data as suggesting that TCTR is a viable minimally invasive option, comparable to other minimally invasive techniques rather than clearly superior to them.

Why This Is on a Chiropractor's Reading List

The framing matters. This is not a paper about whether chiropractic care competes with surgery. It is a paper about what surgery now looks like for the subset of carpal tunnel patients whose conservative care, eventually, does not get them where they need to be.

That subset exists in every chiropractic practice that sees enough wrist and hand patients. A patient may come in for what looks initially like a forearm pronator-related median nerve issue, work through several weeks of soft tissue work, joint mobilization at the wrist, ergonomic correction, and night splinting, and continue to wake at 3 a.m. with the same numbness in the thumb and index finger. At some point, the conservative ladder runs out. Knowing what the next rung looks like, in plain detail, is part of what makes the referral conversation a real conversation.

For decades, the next rung has effectively meant open carpal tunnel release. The percutaneous and threaded techniques summarized here are something different. They are done under ultrasound guidance, often through a small-needle entry point, with the patient awake. Recovery footprints reported in this literature are shorter than open release, though the comparison the Ezenwanne review actually performs is not against open release, but among the newer minimally invasive options themselves.

What Patients Want to Know That This Paper Helps Answer

The questions a CTS patient actually asks before surgery sound like this. How long until I can use my hand normally. Will the procedure leave a visible scar. Will my pillar pain be like what my neighbor described after open release. Is one of the new techniques better than the other.

This paper answers the last question in a useful way. The honest answer is that in the current evidence, TCTR and other minimally invasive techniques produce comparable outcomes. The choice between them depends more on local surgical expertise, ultrasound capacity, and patient preference than on a clean superiority signal in the literature. That answer is more useful than overclaiming a winner.

Where Conservative Care Sits in the Sequence

This paper does not study conservative care. The patients in these five trials had already crossed the line from conservative management into a surgical decision. Conservative care for CTS, including manual therapy, neural mobilization, ergonomic and load modification, and night splinting, has its own evidence base outside this review. The takeaway from the Ezenwanne synthesis is not that conservative care is being challenged. It is that when the conservative ladder ends, the surgical options at the top of it are now more refined than they used to be.

Knowing that lets a chiropractor say something more honest than "if this does not work, surgery is the next conversation." It lets the conversation be specific. There are multiple modern minimally invasive options. They produce comparable outcomes in the current data. The decision is local, not universal.

Where This Fits in the Wider Conversation

Three threads in the Forward Review archive intersect with this paper.

The first is the natural-history thread. Mc Auliffe and colleagues showed that the five-year clinical course of non-surgical lumbar spinal stenosis includes a meaningful subset who improve and plateau without surgery, and another subset who do not. CTS appears to follow a similar shape. Some patients respond to conservative care durably. Some respond partially. Some do not respond and end up in the population the Ezenwanne review studies. Knowing the literature on the surgical options matters because part of the chiropractic patient population eventually crosses that threshold.

The second is the ladder-of-care thread. Dos Santos and colleagues examined whether adding manual therapy to exercise produced consistent additive value across five chronic low back pain trials. The signal was inconsistent. The clinical lesson generalizes. The right intervention depends on where on the ladder the patient is. The wrong intervention at the wrong rung wastes time. The same logic applies in CTS care, and it argues for clinicians who know all of the rungs, not only the ones they personally deliver.

The third is the delivery-arrangement thread. Del Furia and colleagues mapped Cochrane EPOC evidence on how rehabilitation services are organized and funded. The placement of newer minimally invasive surgical options in the CTS pathway is partly a clinical question and partly a delivery-arrangement question. Whether a patient gets TCTR or another MIS technique depends on what the local hand surgeon offers, what the imaging suite supports, and what the payer covers. The evidence base described here is one input among several.