Sciatica is a symptom, not a diagnosis
Sciatica describes where pain travels, not what started it. The AAOS describes the pattern as sharp and often shooting, running from the buttock down one leg, with numbness, tingling or weakness sometimes along for the ride.
"Pinched nerve" is the everyday phrase for the cause. A nerve root leaving the lower spine gets irritated or crowded, and the leg pays for it. University of Utah Health uses the clinical word, radiculopathy, and lists it next to sciatica among the problems it treats with decompression therapy.
A disc is one suspect.
How do you know if a disc is behind your sciatica?
No web page can confirm it, but some patterns lean toward a disc. Mecham Chiropractic looks for:
- leg pain that builds the longer you sit or drive
- pain reaching past the knee, not just into the thigh
- trouble bending forward or getting out of a chair
- flare-ups that ease off, then return
A long drive down to St. George is the test nobody volunteers for. If the leg is shouting by Cedar City and quiets after a walk around a gas station, that fits the sitting pattern.
Level matters too. Most discs the clinic treats with decompression are in the low lumbar spine, at L4–L5 and L5–S1, and trouble there tends to send pain through the buttock and thigh into the calf. When the exam points to the facet joints, the sacroiliac joint or the muscles instead, decompression isn't the tool, because it wasn't designed for those.
Why decompression gets considered for sciatica
Here's the logic, stated fairly. If a disc is crowding a nerve root, easing the load on that disc might give the nerve some room. The DRX9000 goes after that with a pelvic harness and a pull that ramps up and eases off in cycles, since a constant pull makes the back muscles tighten and fight it.
Excite Medical pitches the table at exactly this: sciatica and low back pain linked to herniated discs, along with radicular pain. Its FDA clearance dates to 2006, and cleared isn't the same as approved, which the guide to the DRX9000 decompression table unpacks.
Can spinal decompression help sciatica? What the evidence says
Weakly, if at all. That's the plain version.
Sciatica wasn't an afterthought in the research, which makes the result harder to wave away. When Wegner and colleagues gathered 32 randomized trials and 2,762 people for their 2013 Cochrane review, they looked at people with and without sciatica, and traction had little or no effect on pain, function, overall improvement or return to work either way. Manual or mechanical, alone or added to other care: same story.
One detail in that review matters more for nerve pain than for plain back pain. The 7 of 32 studies that reported side effects listed increased pain, later surgery and aggravated neurological signs. If your leg is already numb or weak, you'd want to know that before anyone straps you in.
University of Utah Health Plans leans on a second source. A 2016 AHRQ review by Chou and colleagues found only low-strength evidence for traction in radicular low back pain, the formal name for nerve-root leg pain, and the plan's policy MP-053, revised in December 2025, calls vertebral axial decompression investigational.
Richard Deyo, a professor emeritus at Oregon Health & Science University, put it bluntly to FairWarning in 2020: "the best evidence suggests there's not much of an advantage of these things."
Against all that sits a fact that cuts both ways. Wang's 2020 review found herniations regressed in 63% of people treated without surgery, so time is often working on a herniated disc whatever else you do, which flatters any study without a comparison group, including the 30-patient DRX9000 cohort from Christian Apfel's team that reported pain falling from 6.2 to 1.6.
So why would a clinic offer it at all? Fair question. Mecham Chiropractic's answer is a short, supervised trial inside a broader plan, reconsidered at treatments 8 to 12 if nothing meaningful has changed, and what spinal decompression research actually shows lays out the full case.
When sciatica is an emergency, and who can't have decompression
Sciatica with loss of bladder or bowel control is an emergency. It can be cauda equina syndrome. Go to an emergency room now, not to a chiropractor. Leg weakness that's getting steadily worse also needs a physician quickly, before decompression is even discussed.
Some people are excluded however disc-like the pain looks: a broken or unstable spine, screws, rods or cages from surgery, cancer involving the spine, bones thinned too far by osteoporosis, pregnancy, or an aortic aneurysm. Dr. Cody Mecham screens for each one, and signs of cauda equina go to surgical evaluation.
What sciatica care looks like at Mecham Chiropractic
Table time comes after the exam: your history, orthopedic tests that help separate disc pain from joint or muscle pain, and a review of any imaging that's relevant.
When the disc fits, plans generally run 20 to 30 sessions across 8 to 12 weeks at about 20 to 30 minutes apiece, alongside chiropractic care and practical guidance on positions and movement. Some next-day soreness can happen early. Pain that spikes during a session is the signal to stop and reassess, and the step-by-step look at decompression sessions covers the rest.
Got that St. George trip on the calendar? Mention it at the exam.
Cost and coverage
Expect to pay yourself, because Medicare doesn't cover vertebral axial decompression and Aetna calls it unproven. FairWarning's 2020 reporting found a full DRX9000 course running about $3,500, which shows the scale but not what any particular clinic charges.
Read how decompression is priced in Salt Lake City and decompression insurance coverage in Utah. If an MRI mentioned a herniation, see non-surgical herniated disc treatment; if it said degeneration, see degenerative disc disease treatment.