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Chattanooga

Chattanooga Triton 6E DTS, Hi-Lo Traction Table, 90.5" x 37" x 31"

Adjustable InclineCompact 37 by $2 Inch Footprint

$14,043.14

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Chattanooga

Chattanooga Triton 6M DTS, Hi-Lo Traction Table, 90.5" x 37" x 31"

Adjustable InclineCompact 37 by $2 Inch Footprint

$9,408.91

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Pelvic Traction: The Mechanism Behind the Method

Pelvic traction is a mechanical intervention that applies a distractive force to the lumbar spine by anchoring the pelvis and pulling in the caudal direction. The goal is to create separation between vertebral segments, reduce intradiscal pressure, and relieve the compressive loading that drives a significant share of low back and radicular pain presentations.

The physics are straightforward. When axial tension is applied through a pelvic harness, the lumbar vertebrae are drawn apart. That separation temporarily widens the intervertebral foramen, which can reduce mechanical irritation on exiting nerve roots. It also reduces the posterior disc bulge that presses on the annulus fibrosus and, in cases of contained disc herniation, may promote retraction of nuclear material away from the affected nerve root. None of this happens in a single session, but over a structured course of treatment the cumulative effect on pain and function is well documented in the clinical literature.

Pelvic traction is distinct from cervical traction in both the forces involved and the patient positioning considerations. Lumbar traction typically requires much higher tension values, and the harness design has to distribute that load evenly across the iliac crests to avoid soft tissue discomfort at the contact points. A poorly fitted harness or an improperly calibrated tension is one of the most common reasons a patient does not respond to what should be an effective intervention.

Who Actually Benefits: Matching the Indication to the Technique

The strongest evidence for pelvic traction sits with lumbar disc herniation accompanied by radiculopathy. Patients presenting with unilateral leg pain, dermatomal paresthesia, and a positive straight leg raise tend to show the most consistent responses. The working hypothesis is that distraction reduces the compressive vector on the herniated segment, which diminishes both the mechanical and chemical irritation of the affected nerve root. Studies using MRI pre and post traction have demonstrated measurable reduction in disc protrusion in a subset of responders, though results vary with herniation type and chronicity.

Degenerative disc disease with facet joint loading is another common indication. As disc height decreases, the facet joints absorb proportionally more compressive force. Traction partially unloads the facets and can reduce the joint inflammation that produces deep, diffuse low back pain with end-range stiffness. This group tends to tolerate lower tension values and benefits from a position that minimises lumbar lordosis during treatment, typically supine with hips and knees flexed.

Spinal stenosis presents more nuance. Flexion-based traction can widen the spinal canal by stretching the ligamentum flavum, which in a hypertrophied state contributes to central stenosis. However, the evidence is more mixed here, and patient response is harder to predict without trialling treatment at low loads first. Acute spondylolisthesis, vertebral fracture, osteoporosis with fragility risk, active malignancy, and cord compression are firm contraindications. Any patient with bladder or bowel changes needs urgent evaluation before a traction programme begins.

Force Parameters, Dosage, and What the Numbers Mean

Lumbar traction force recommendations vary by source, but a useful starting point is 25 to 30% of body weight for mechanical distraction to overcome muscular resistance and actually separate the lumbar segments. Some protocols begin lower, around 15 to 20%, particularly for patients with acute presentations or high pain sensitivity. The upper end of clinical practice tends to sit around 50% of body weight for sustained traction, though intermittent protocols can safely apply higher peak loads because the on-phase is followed by a rest period that prevents cumulative tissue overload.

The Chattanooga TX Clinical Traction Unit, which is designed to pair with these hi-lo traction tables, has a traction tension range of 0 to 200 lb. That range covers the vast majority of clinical presentations without needing to push the equipment to its limits. For pelvic traction specifically, the QuickWrap DTS Belt Set that ships with the Chattanooga Traction Kit is rated for lumbar applications up to 300 lb, which means the harness is not the limiting factor in most adult populations.

Treatment duration is typically 8 to 15 minutes for sustained traction and somewhat longer for intermittent protocols, where the on/off cycling extends the overall session time. Session frequency follows the general rehabilitation model of three to five times per week in the acute phase, tapering as the patient progresses. A common error in clinical practice is applying too little force for too short a time and then concluding that traction is ineffective. The research consistently shows that sub-therapeutic dosing produces sub-therapeutic outcomes.

Sustained Versus Intermittent Traction: Choosing the Right Mode

The distinction between sustained and intermittent traction matters more than many practitioners acknowledge. Sustained traction applies a constant load for the full treatment duration. It is better suited to presentations where prolonged decompression is the goal, such as nerve root impingement from a disc herniation, because the steady force allows the disc nucleus time to redistribute. The downside is that sustained loads at therapeutic intensities can trigger reflex muscle guarding, particularly early in a treatment programme when the patient has not yet adapted.

Intermittent traction cycles between a hold phase and a rest phase, typically at a programmed ratio such as 60 seconds on and 20 seconds off. The cyclic loading has a pumping effect on the disc, potentially improving fluid exchange within the nucleus pulposus. It also reduces the likelihood of prolonged muscle spasm because the rest phase allows paraspinal musculature to relax between pulls. For patients who cannot tolerate sustained loading, intermittent traction at the same peak force is usually better tolerated and may be equally effective over a full course of treatment.

Table equipment that allows precise programming of hold time, rest time, and force ramp rates gives the clinician meaningful control over these variables. A table that only offers coarse manual adjustment limits treatment individualisation in ways that matter when a patient's response is borderline.

Patient Positioning: Why Table Design Directly Affects Outcomes

Spinal position during pelvic traction is not incidental. The lumbar spine behaves differently under distraction depending on whether it is in neutral, flexion, or extension, and that difference affects which structures are preferentially unloaded. Supine positioning with 90 degrees of hip flexion (the hook-lying position) flattens lumbar lordosis and is the most commonly used starting point. It opens the posterior intervertebral spaces, stretches the posterior longitudinal ligament, and keeps the facet joints in a relatively open-packed position, which reduces compressive force through those joints during the pull.

Prone traction, applied with the lumbar spine in mild extension, loads the anterior disc and is used selectively for anterior disc bulge presentations or for patients who find prone positioning more comfortable. Prone traction also tends to produce greater separation of the posterior elements when combined with a slight flexion adjustment through a split-table design.

This is where table sectional design becomes clinically significant. The mechanical principles that define traction table performance come down substantially to whether the table can achieve and hold the angle each patient needs without the clinician fighting gravity or depending on manual support. The Chattanooga Triton 6E, for example, operates six independently powered sections through separate actuators, allowing the clinician to set head section elevation from -30 to +40 degrees and pelvic section inclination from 0 to 20 degrees. That kind of independent control is not cosmetic. It changes what the table can do for a specific patient on a specific day.

Choosing the Right Table for Pelvic Traction Work

Table selection has real consequences for treatment quality. A hi-lo table that adjusts from a low transfer height to a working height keeps patient transfers safe and reduces physical load on the clinician. For pelvic traction specifically, the table needs enough width to support the patient's full torso without the arms hanging off the sides, and enough length to accommodate taller patients without the feet overhanging the end. Both the Triton 6E and the Triton 6M measure 90.5 by 37 inches, which handles the upper percentiles of adult stature comfortably. The Galaxy TTET400 comes in at 83 by 25 inches, a more compact footprint suited to smaller treatment rooms.

Weight capacity is an underappreciated specification. Both Triton tables are rated to lift up to 440 lb, while the Galaxy TTET400 uses proprietary Hallotronic actuators to achieve a 500 lb lift capacity from a height range of 22 to 40 inches. A table that reaches its rated capacity under a heavy patient will strain the actuator and may not maintain stable positioning during traction. Specifying a table with margin above your typical patient weight is good practice.

The Triton 6E is the fully electric option in the Chattanooga lineup, with all six section movements powered by dedicated actuators. The Triton 6M uses a combination of gas springs and electric power, which reduces cost but involves a slightly different handling feel for the clinician. For a high-volume practice where the table is adjusted many times per day, the all-electric system reduces cumulative clinician effort meaningfully. The Galaxy series is a four-section design, which suits settings where traction is one treatment modality among several rather than the primary focus.

Model	Sections	Table size	Price
Chattanooga Galaxy TTET300, 3 Section Hi-Lo Traction Table, Foot Bar Lift, Black	3	86.6" x 33.5"	$6,169.95
Chattanooga Galaxy TTET300, 3 Section Hi-Lo Traction Table, Foot Bar Lift, Gray	3	86.6" x 33.5"	$6,169.95
Chattanooga Galaxy TTET300, 3 Section Hi-Lo Traction Table, Foot Bar Lift, Graphite Gray	3	87" x 34"	$6,169.95
Chattanooga Galaxy TTET300, 3 Section Hi-Lo Traction Table, Foot Bar Lift, Imperial Blue	3	87" x 34"	$6,169.95
Chattanooga Galaxy TTET300, 3 Section Hi-Lo Traction Table, Foot Bar Lift, Navy Blue	3	87" x 34"	$6,169.95
Chattanooga Galaxy TTET400, 4 Section Hi-Lo Traction Table, Foot Bar Lift	4	83" x 25"	$7,257.23

The Galaxy TTET300 and TTET400 share the same fundamental scissor-frame architecture with retractable multidirectional wheels, which makes repositioning between patients practical in a busy clinical setting. The four-section TTET400 adds segmental adjustability at the head and leg sections that the three-section version does not have, which matters for patients who need precise lower extremity positioning during lumbar traction. Both are available through the traction equipment range at PPW.

The Harness Setup: What Separates a Good Session from a Wasted One

The harness is where pelvic traction fails in practice more often than clinicians realise. If the belt rides too high, traction force transfers partly to the thoracolumbar junction instead of distracting the lumbar segments. If it rides too low, it contacts the greater trochanters rather than the iliac crests and becomes uncomfortable at even moderate loads. The correct position seats the superior edge of the belt just below the iliac crest, so the distractive force pulls through the pelvis rather than across it.

The QuickWrap DTS Belt Set, designed for use with the Chattanooga traction system, offers a universal fit design intended to accommodate a wide range of patient body types without requiring multiple belt sizes. Its 300 lb rating for lumbar traction applications means the harness itself is not a constraint even at high therapeutic loads. This matters because replacing a failed harness mid-programme disrupts treatment continuity and introduces a variable into a protocol that should stay consistent.

A thoracic stabilisation belt or chest harness is typically used as a counter-traction anchor, particularly in supine setups where the traction vector might otherwise slide the patient down the table rather than separating the spinal segments. The table's own design can assist here: the Triton tables include tuck-away grab bars specifically for hanging traction without requiring a thoracic restraint, which some patients find more comfortable and which reduces the preparation time per session.

Reading Treatment Response: When to Progress and When to Stop

A meaningful treatment response to pelvic traction is usually apparent within three to five sessions. The most encouraging early sign is centralisation of symptoms, where peripheral leg pain or paresthesia begins to migrate proximally toward the back. This pattern, associated with McKenzie's directional preference framework, predicts a positive longer-term outcome with distraction-based treatment and is one of the clearest indicators to continue and progress the protocol.

Patients who experience a temporary increase in local back pain after the first session but no worsening of leg symptoms are often still on track. This response likely reflects temporary muscle reaction to the distraction force and tends to resolve by the third or fourth session. It is worth distinguishing from a genuine adverse response, where leg pain worsens, neurological signs increase, or the patient reports any change in bladder or bowel function. The latter requires immediate clinical reassessment.

Progression involves incrementally increasing traction force, adjusting the hold-to-rest ratio, or modifying table position to shift loading through a different segment. A patient who plateaus at mid-programme often responds to a positional change rather than a further increase in force. Changing from 0 degrees of hip flexion to 60 or 90 degrees in supine, for instance, shifts the maximal distraction from L4-L5 toward L5-S1, which may be more relevant to their pathology.

Combining Pelvic Traction with Other Treatments

Pelvic traction rarely operates in isolation in a well-designed rehabilitation programme. Pre-traction heat application reduces paraspinal muscle tone and allows the distraction force to reach the target structures with less resistance. Ultrasound or electrical stimulation prior to traction follows the same logic: reducing the baseline irritability of the soft tissue environment before applying a mechanical load. Manual therapy applied to adjacent segments before traction can improve segmental mobility and allow the traction force to distribute more evenly across multiple lumbar levels rather than concentrating at one dysfunctional segment.

Post-traction exercise timing is worth considering carefully. The period immediately following a session, when intradiscal pressure is temporarily lower and the patient has benefited from some neuromuscular inhibition, is not the time for high-load lumbar exercise. Light stabilisation work in a neutral spine position is appropriate. Heavy loading of the posterior chain should wait until the treatment response is established and the patient is moving well out of the acute phase.

Cervical traction is a separate but often co-occurring need in patients with multilevel degenerative spine disease. A practice equipped for lumbar traction will regularly see patients who also need cervical decompression, making it practical to evaluate cervical traction options alongside lumbar ones. The Chattanooga system explicitly separates the table from the traction unit, meaning the same table platform can be used with different traction unit configurations depending on the region being treated.

What the Evidence Actually Says, and Where It Falls Short

The clinical trial literature on lumbar traction has produced inconsistent results, which has led some reviewers to conclude the intervention lacks efficacy. That conclusion is probably too broad. A closer reading of the literature suggests that the inconsistency comes largely from heterogeneous patient selection, inadequate traction dosing, and poor control over positioning variables across studies. Trials that applied adequate force to well-defined patient subgroups, particularly those with disc herniation and radiculopathy, tend to report positive outcomes at a higher rate than trials using mixed low back pain populations.

The CRISP trial and several subsequent secondary analyses suggest that traction is most effective when matched to a patient subgroup characterised by peripheralisation of symptoms, a positive crossed straight leg raise, and a body mass index below a threshold associated with reduced treatment response. This kind of clinical prediction rule thinking has shifted the field away from asking whether traction works toward asking for whom and under what conditions it works. That is a more useful question for a practitioner making individual treatment decisions.

The limitation that remains genuinely unresolved is the mechanism. Vertebral separation during traction is measurable, but whether that separation directly explains the clinical benefit or whether neurophysiological effects, reduced muscle spasm, or treatment context effects account for part of the response is still debated. For the practitioner, this is less critical than a patient-centred reading of the evidence: pelvic traction applied at appropriate doses to the right patients, using equipment that allows precise and reproducible control of force and position, is a defensible and often effective part of a lumbar rehabilitation programme.

Setting Up a Pelvic Traction Service in Clinical Practice

A functional pelvic traction service requires a table capable of hi-lo adjustment, a calibrated traction unit, appropriate harness components, and enough floor space for the clinician to move around the patient safely. The table footprint is often the binding constraint in smaller practices. The Galaxy TTET400 at 83 inches long and 25 inches wide will fit in a standard treatment bay that a longer table would crowd. For practices where traction is a primary revenue procedure and patient volumes justify the investment, the Triton 6E at $14,043.14 offers the most comprehensive positioning capability. For a mid-volume general practice, the Triton 6M at $9,408.91 delivers most of the same clinical functionality at a lower price point.

More traction equipment worth a look

Chattanooga

Chattanooga Galaxy TTET400, 4 Section Hi-Lo Traction Table, Foot Bar Lift

Compact 83 by $2 Inch FootprintBuilt-In Transport Wheels

$7,257.23

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Chattanooga

Chattanooga Galaxy TTET400, 4 Section Hi-Lo Traction Table, Foot Bar Lift, Navy Blue

Compact 83 by $2 Inch FootprintBuilt-In Transport Wheels

$7,257.23

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Frequently asked questions