Spinal Decompression for Sciatica & Herniated Discs

When a patient is told they have a herniated or bulging disc, the conversation usually jumps straight to "manage the pain" or "consider surgery." There''s a third option most patients don''t hear about: non-surgical spinal decompression therapy.

This article explains what spinal decompression actually does mechanically, who it works for (and who it doesn''t), and how Midway Chiropractic in Des Moines, WA structures decompression around their DRX9000 system.

The mechanical problem: why discs hurt

A spinal disc is essentially a hydraulic shock absorber — a tough outer ring (annulus) around a gel center (nucleus). When the disc is compressed for years (sitting, poor posture, repeated lifting, or trauma from an auto accident), the gel center can push outward, creating a bulge or herniation that presses on a nerve root.

That nerve compression is what produces classic sciatica symptoms: shooting leg pain, numbness, tingling, or weakness — usually worse with sitting or bending.

What the DRX9000 actually does

The DRX9000 is an FDA-cleared decompression table that applies a precisely controlled, computer-modulated distraction force — typically between 30 and 100 lbs — to a specific spinal level (usually L5/S1, L4/L5, or C5/C6 for cervical models).

Unlike old-school traction, the DRX uses a logarithmic pull-and-release cycle that prevents the body''s protective muscle spasm response. The result, measured in studies, is a brief negative intradiscal pressure of roughly −110 to −150 mmHg at the targeted level. That negative pressure does two things:

1. Creates a vacuum effect that can pull herniated nuclear material back toward center
2. Improves diffusion of oxygen, water, and nutrients into the disc — which is otherwise avascular and starved of blood supply

A typical session lasts 20–25 minutes and is completely passive — patients lie on the table with a harness around the pelvis and torso.

Who is a good candidate?

Decompression works best for:

• Lumbar or cervical disc herniation confirmed by MRI or strong clinical signs
• Sciatica with leg pain worse than back pain
• Failed conservative care (NSAIDs, physical therapy alone)
• Facet syndrome with degenerative disc disease

Decompression is generally not appropriate for: post-surgical fusion at the target level, advanced osteoporosis, pregnancy, abdominal aortic aneurysm, or severe spinal stenosis with myelopathy.

A typical decompression protocol

Most herniated disc patients at Midway Chiropractic follow a 6–8 week protocol:

• Weeks 1–3: 3 sessions/week. Decompression paired with Class IV laser therapy and ice.
• Weeks 4–6: 2 sessions/week. Add Active Release Technique to release the surrounding muscle compensation.
• Weeks 7–8: 1 session/week plus structured home exercise to re-build the deep stabilizers.

Approximately 20–24 total sessions is the published target for full disc rehabilitation. Patients usually feel meaningful pain relief within the first 6–10 visits.

What the research says

Multiple peer-reviewed studies on DRX9000-style decompression report symptom resolution rates between 71% and 86% for properly screened lumbar disc patients (Apfel et al., 2010; Macario & Pergolizzi, 2006). Outcomes are best when decompression is combined with rehab, not used in isolation.

How it fits with Midway''s other services

Where Midway differs from a single-modality decompression clinic is integration. The same intake that produces a decompression recommendation also opens access to acupuncture (effective for nerve-root inflammation), massage therapy (for secondary muscle guarding), and exercise rehabilitation (to lock in gains).

The bottom line

For the right patient — someone with a confirmed disc herniation, sciatica, and a willingness to commit to a 6–8 week protocol — non-surgical spinal decompression is a legitimate alternative to injections or surgical consultation.