Traction
Process of drawing, or pulling apart, of a
body segment
Mechanical Traction -using a traction
machine or ropes/ pulleys to apply a traction
force
Manual Traction -clinician positions patient
and applies traction force to joints of the
spine or extremities
Effects of Traction: Spine
Encourages movement between
each individual spinal segment
Amount of movement varies
according to…
Position of spine,
Amount of force, and
Length of time the
force is applied
Transient effect
Effects of Traction: Spine
pain, paresthesia, or tingling
Due to physical separation of vertebral
segments thus decreasing pressure on
sensitive structures
As long as positive physiologic
effects occur,
traction should
be continued
Effects ofTraction: Bone
No immediate effects due to traction
May result in increased spinal movement that
reverses bone weakness associated with
immobilization
May assist with increasing or maintaining
bone density
Effects ofTraction: Ligaments
Stretching effect
Structural changes occur slowly due to
viscoelastic properties
Ligaments resist shear forces and return to
original form following removal of a deforming
load
Sensitivity to rate of loading
Ligament deformation results in lengthening
of a ligament caused by traction loading
Slow loading rates allow for more deformation
Effects ofTraction: Disks
Normal disk in non-compressed position
Internal pressure (indicated by arrows) is
exerted equally in all directions
Internal annular fibers contain nuclear
materials
Effects ofTraction: Disks
In an injured disk, sitting or standing
compresses the disk causing the nucleus to
become flatter
Pressure in this instance still remains
relatively equal in all directions
Effects ofTraction: Disks
In an injured disk, movement in weight-
bearing causes a horizontal shift in nuclear
material
If this was forward bending, the bulge would
occur in the posterior annular fibers
Anterior annular fibers would be slackened and narrow
Effects ofTraction: Disks
Herniation of the nuclear material occurs if
the annular wall becomes weak
Herniation may possibly put pressure on
sensitive structures in the area
Effects ofTraction: Disks
When placed under traction, intervertebral space
expands thereby decreasing pressure on the disk
Taut annular fibers create a centripetally directed
force
Decreases herniation and pressure on sensitive
structures in the area
Effects ofTraction: Articular Facet
Joints
Facet joints are separated releasing impinged
structures
Dramatic reduction in symptoms
Joint separation decompresses articular
cartilage allowing synovial fluid exchange to
nourish cartilage
Decreases rate of degenerative changes
Increased proprioception from facet joint
structures provide sensation of pain relief
Effects ofTraction: Muscles
Vertebral muscles can be stretched
Initial stretch should come from body
positioning
Stretch lengthens tight muscle
Allows for better muscular blood flow
Activates muscle proprioceptors providing
sensation of pain relief
Gate Control Theory
Effects ofTraction: Nerves
Focus of most traction treatments
Pressure on nerves or nerve roots often
associated with spinal pain
Unrelieved pressure on a nerve will cause
Slowing, eventual loss of impulse conduction
Motor weakness, numbness, and loss of reflex
Pain, tenderness, and muscular spasm
Lumbar Positional Traction
Patient typically on restricted activity program
“Trial and error” process to determine position
that offers maximum comfort
Side-lying Position: Unilateral
Foramen Opening
Lateral Herniation
Patient leaning away
from painful side
Lie painful side up
Lie on right side over
blanket roll
Side-lying Position: Unilateral
Foramen Opening
Lateral Herniation
Patient leaning away
from painful side
Lie painful side up
Lie on right side over
blanket roll
Medial Herniation
Patient leaning toward
painful side
Lie painful side down
Lie on right side over
blanket roll
Side-lying Position: Unilateral
Foramen Opening
Side-lying with a
blanket roll between
iliac crest and rib cage
Increases
intervertebral foramen
size of superior side of
lumbar spine
Side-lying Position: Unilateral
Foramen Opening
Maximum opening of
intervertebral
foramen
Achieved by flexing
upper hip and knee
and rotating
shoulders in
opposite directions
Maximum opening of left side
Supine Position: Bilateral Foramen
Opening
Knees to chest
position
increases size of
lumbar intervertebral
foramen bilaterally
Separation of
spinous processes
Inversion Traction
Hang upside down
Lengthens spinal
column due to
stretch provided by
weight of trunk
Repeat inversion
2-3 times
Observe for signs of
vertigo, dizziness, or
nausea
Manual Lumbar Traction
Used prior to mechanical traction
Helps determine degree of lumbar flexion,
extension, or side-bending that is most
comfortable
Most comfortable position is usually best
therapeutic position
Level-Specific Manual Traction
Position patient for
maximum effect at a
specific spinal level
Lumbar spine flexed
using upper leg as
lever
Palpate interspinous
space
Upper spinous
process is where
maximum effect is
desired
Level-Specific Manual Traction
When motion of lower
spinous process can
be palpated, place
foot against opposite
leg to prevent further
flexion
Trunk is then rotated
toward the upper
shoulder until motion
of upper spinous
process can be
palpated
Level-Specific Manual Traction
Place chest against
ASIS and upper hip
Lean toward
patient’s feet
Use enough force to
cause a palpable
separation of the
spinous processes
at desired level
Unilateral Leg Pull Manual Traction
Hip joint problems or
difficult lateral shift
corrections
Thoracic counter-
traction harness is used
Hold ankle and move
hip into 30
o
flexion, 30
o
abduction, and full
external rotation
Apply steady traction
force until noticeable
distraction occurs
Unilateral Leg Pull Manual Traction
Sacroiliac problems
In addition to thoracic
counter-traction
harness, strap is
placed through groin
and secured to table
Hold ankle and move
hip into 30
o
flexion and
15
o
abduction
Apply steady traction
force
Mechanical Lumbar Traction:
Equipment
Use split table to eliminate friction between body
segments
Non-slip traction harness stabilizes trunk
Mechanical Lumbar Traction:
Setup
Pelvic harness
Applied while standing
Contact pads and
upper belt placed at, or
just above, iliac crest
Rib pads
Positioned over lower
rib cage
Mechanical Lumbar Traction:
Body Positioning
Neutral spinal
position
Allows for largest
intervertebral
foramen opening
before traction is
applied
Usually position of
choice whether
prone or supine
Mechanical Lumbar Traction:
Body Positioning
Flexion
Increases posterior
opening
Puts pressure on
disk nucleus to
move posterior
Other soft tissue
may also close
foramen opening
Mechanical Lumbar Traction:
Body Positioning
Extension
Closes foramen
because bony
arches come closer
together
Mechanical Lumbar Traction:
Body Positioning
Prone position
Used with normal to
slightly flattened lumbar
lordosis
Best for disk protrusions
Place pillows under
abdomen
Other modalities may be
applied
Allows for assessment of
spinous process
separation
Mechanical Lumbar Traction:
Body Positioning
Supine position
Produces posterior intervertebral separation
Optimal at 90
o
hip flexion
Unilateral pelvic traction recommended if stronger
force is desired
Scoliosis,
Unilateral joint
dysfunction, or
Unilateral lumbar
muscle spasm
Traction Force
No lumbar vertebral separation will occur with
traction forces less than 1/4 of body weight
Effective traction force ranges between 65 and
200 pounds
Traction force recommended = 1/2 body
weight
Must use progressive steps to comfortably
reach therapeutic loads
Intermittent vs. Sustained Traction
Intermittent Traction
Effective for posterior intervertebral
separation
No firm recommendations for on/off times
Sustained Traction
Recommended for disk protrusion and
rupture
Treatment Duration
With suspected disk protrusions, total
treatment time should be relatively short
10 minutes or less
If treatment reduces symptoms, treatment
time should remain at 10 min or less
If the treatment is partially successful or
unsuccessful in relieving symptoms, gradually
increase time over several treatments up to
30min
Progressive and Regressive Steps
Traction equipment may be built with
progressive and regressive modes
Progressivemode
Increases traction force in a pre-selected
number of steps
Allows slow accommodation to traction
Regressivemode
Decreases traction force in a pre-selected
number of steps
Patient comfort is primary consideration!
Manual Cervical Traction
Stretches muscles and joint structures
Enlarges intervertebral spaces and foramen
Creates centripetally directed forces on disk
and surrounding soft tissue
Mobilizes vertebral joints
Increases joint proprioception
Relieves compressive effects of normal
posture
Improves arterial, venous, and lymphatic flow
Manual Cervical Traction
Variety of head and neck
positions
Hand should cradle neck
contacting one mastoid
process
Other hand on chin
Gentle pull, <20 pounds
Intermittent pull, 3 -10 sec
Treatment time, 3 -10 min
Mechanical Cervical Traction
Supine
Neck flexed 20 -30
o
Traction harness pulls on
occiput
Intermittent pull
> 20 pounds
Minimum of 7 seconds
Adequate rest time for
recovery
Treatment time, 20 -25 min
Forces up to 50 pounds
may produce increased
intervertebral separation.
Mechanical Cervical Traction
Wall-mounted device
Inexpensive
Static traction most easily
employed
Use weight plates, sand bags, or
water bags
Intermittent traction may be used
Sitting or prone
Gentle pull, 10 -20 pounds
Treatment time, 20 -25 min
Indications for Spinal Traction
Nerve root
impingement
Disk herniation
Spondylolisthesis
Narrowing within
intervertebral foramen
Osteophyte formation
Degenerative joint
diseases
Subacute pain
Joint hypomobility
Discogenic pain
Muscle spasm or
guarding
Muscle strain
Spinal ligament or
capsular contractures
Improvement in
arterial, venous, and
lymphatic flow
Contraindications for
Spinal Traction
Acute sprains or
strains
Acute inflammation
Fractures
Vertebral joint
instability
Any condition in which
movement
exacerbates existing
problem
Bone diseases
Osteoporosis
Infections in bones or
joints
Vascular conditions
Pregnant females
Cardiac or pulmonary
problems