Introduction to Traction as a Therapeutic Modality
Definition of Traction: Traction involves applying a mechanical force to the body to elongate or separate tissues.
* Traction can be applied to various body parts, mainly focusing on the cervical and lumbar spine, and occasionally to peripheral joints like the knee and ankle.
* Unlike manual therapy techniques, traction is considered a therapeutic agent or modality.
Types of Traction Applications
Static Traction: Force is applied and held steady.
Intermittent Traction: Force is applied, released, and reapplied in cycles.
Mechanical Traction Devices:
* Electrical Mechanical Traction: Uses motors to apply traction.
* Pneumatic Traction: Utilizes air pressure to create separation.
* Manual Traction: Therapist uses hands or belts to apply traction.
Positional Traction: Patient uses body position to create elongation on one side, promoting separation.
Inverse Traction: Patient is inverted, using gravity as traction.
Self Traction: Patient uses body positioning to provide traction autonomously.
Spinal Anatomy Overview
The vertebral column typically consists of 24 vertebrae (some individuals may have extras).
* Intervertebral Discs: Act as shock absorbers, containing a thick annular fiber and a soft nucleus pulposus.
* Spinal Cord: Located within the intervertebral space, alongside openings for nerve roots to exit.
* Facet Joints: Articulate vertebrae at the back of the spine.
Effects of Traction
Joint Distraction: Separating the vertebrae by a few millimeters can alleviate pressure on the spinal nerves and facet joints.
Reduction of Disc Protrusions: Traction can create a vacuum effect, helping to re-centralize disc material.
* Mechanisms:
1. Vacuum effect pulls the nucleus back into the center.
2. Tension on the posterior longitudinal ligament increases resistance, guiding disc material back.
Stretching Soft Tissues: Similar forces used for disc protrusion can help elongate ligaments, muscles, and tendons, aiding relaxation and improving joint mobility.
Muscle Relaxation: Traction techniques can disrupt cycles of muscle spasm and pain through mechanoreception and reduced pressure on nerves.
Clinical Indications for Using Traction
Disc Related Conditions: Disc bulge or herniation can benefit from traction to centralize material back to its proper space.
Nerve Root Impingement: Can relieve pressure from arthritis or inflammation.
Joint Hyper-Mobility: General hypomobility may be treated with traction.
Subacute Inflammation: Traction can help reduce pressure and inflammatory edema.
Muscle Spasms: Alleviating spasms through traction can stop the pain-spasm cycle.
Recent Injuries: Avoid in the first 72 hours post-injury.
Hypermobility or Instability: Conditions like Down syndrome or rheumatoid arthritis require caution.
Medical Issues: Uncontrolled hypertension, tumors, infections, osteoporosis, cognitive impairments, and certain positional intolerances.
Precautions and Risks
Rebound Effect: Pain may increase after traction due to excessive initial force.
Radicular Symptoms: Lumbar symptoms might arise from cervical traction due to dura mater stretching.
Different Mechanical Techniques for Traction
Motorized Electrical Traction Units: Allow computerized settings for adjusted parameters.
Home Devices: Relatively inexpensive pneumatic traction units available for patient use at home.
Advantages: Controlled force, relatively low cost (e.g., water bag over the door for $30 vs. pneumatic units for around $350).
Disadvantages: Time-consuming setup, potential anxiety due to lack of control, and high costs for some patients.
Self Traction Techniques
Self traction is for patients who need low levels of traction. Techniques may include hanging from overhead bars with appropriate support.
Safety considerations: Patients should maintain contact with the floor and have good balance.
Positional Traction
Utilized to specifically address unilateral spine issues by placing pressure on one side while opening space on the opposing side.
No special equipment is required, making it a low-cost option.
Inverse Traction
Uses the body's weight to provide distraction by inverting the patient.
Caution required for patients with high blood pressure or eye pressure issues (glaucoma).
Manual Traction
Therapist applies force manually, often in a diagnostic capacity to monitor patient response.
May not achieve sufficient force for joint distraction but is helpful for real-time patient assessment.
Parameters for Traction Treatments
Lumbar Traction: Start with 30-40 pounds, can increase to 50% or more of body weight. Duration around 5-10 minutes for static, 20-30 minutes for intermittent.
Cervical Traction: Initial traction force of 8-10 pounds; not exceeding 30 pounds in total pressure. Treatment durations are similar to lumbar traction.
Position Considerations: Prone for anterior structures, supine for posterior structures.
Tracking and Documentation
Document type (mechanical, manual, etc.), area treated (lumbar or cervical), patient position, maximum force, treatment time, patient response (e.g., pain levels, range of motion changes, symptom centralization).