www.Lommell.com

Feel Better . . . Live Better    
Risk Factors for Injury

Home
Clinic Information
Fee Schedule
New Patient Intro
St. Malachy
Doctor Information
Cold Laser Therapy
Gua Sha
FREE Health Webinars
Conditions Treated
Work Injuries
X-Rays
Kinesio Tape
Spinal/Pelvic Stabilizers
Research
Important Links
Expert Witness
Impairment Rating
Discredited ODG Guidelines
Orthopedic Diplomate
Collision Reconstruction
Community Outreach
Mapquest
Dynamic Chiro Charts
Search
Site Map

Inside Headaches from Whiplash Injuries
Up ] Cervical Whiplash Injuries ] Lumbar Whiplash Injuries ] Wrist Whiplash Injuries ] Headaches Following Whiplash ] MTBI ] Factors Delaying Recovery ] Whiplash Flare-ups ] [ Risk Factors for Injury ] Side Impact Collisions ] Common Prescriptions ]

Risk Factors  For injury

by Arthur C. Croft, DC, MS, MPH, FACO, FACFE
Director - Spine Research Institute of San Diego

Repeated research studies have shown that, in healthy males who are prepared for the collision, without any of the following risk factors present, the lower limit for cervical spine soft tissue injury is a delta-V at or below 5mph.  Recent findings indicate that this lower limit could be as low as 2.5 mph. 

 Risk for Acute Injury

  1. Alcohol intoxication.
  2. Low body mass index/head neck index (i.e. decreased risk with increasing mass and neck size)
  3. Crash speed under 10mph.
  4. Female gender.
  5. Having the head turned at impact.
  6. History of neck injury.
  7. Impact by vehicle of greater mass (i.e. >25% greater).
  8. Inclined head position.
  9. Increasing age (i.e. middle age and beyond).

  10. Non-awareness of impending impact.
  11. Non-failure of seat back.
  12. Occupant in a minicar or subcompact.
  13. Out of position occupant (e.g., leaning forward/slumped)
  14. Poor head restraint geometry/tall occupant (e.g. > 80th percentile male).
  15. Rear impact (vs. other impact vectors).
  16. Use of seat belt shoulder harness (i.e., standard three-point restraints).

 

 

Risk for Late Whiplash Syndrome

 

Victims with the following characteristics have a higher risk of developing Late Whiplash Syndrome:

 

  1. A loss of, or reversal of the cervical lordosis (curve).

  2. Low body mass index in females only.

  3. Canal stenosis.

  4. Cigarette smoking.

  5. Clinically significant nutritional or endocrine disorders, e.g. diabetes.

  6. Continued alcohol consumption.

  7. Early onset of numbness.

  8. Emotional stress caused by persistent symptoms.

  9. Female gender.

  10. Front seat position.

  11. Greater number of initial symptoms.

  12. Greater subjective cognitive impairment.

  13. Headrest distance greater than 10 cm.

  14. Immediate/early onset of symptoms (i.e., within 12 hours) and/or severe initial symptoms.

  15. Increasing age (i.e., middle age and beyond).

  16. Initial back pain.

  17. Initial degenerative changes seen on radiographs.

  18. Initial neurological symptoms.

  19. Initial physical findings of limited range of motion.

  20. Ligamentous instability.

  21. Mass ratios, with smaller vehicles being worse.

  22. Multiple injuries.

  23. Need to resume physical therapy more than once.

  24. Non-awareness of impending impact.

  25. Out of position occupant (e.g., leaning forward/slumped).

  26. Past history of neck pain or headache.

  27. Persistence of symptoms beyond 3 months.

  28. Previous whiplash injury.

  29. Prolonged use of cervical collar.

  30. Rear impact (vs. other impact vectors).

  31. Sharp reversal of cervical curve.

  32. Time off work.

  33. Use of seat belt/shoulder harness - for neck (not back) pain.  (non-use has a protective effect.)

 

Comparison of Occupants Who Reports Symptoms Following Rear-End Crashes

 
The Following Report Fewer Neck Injuries  
bullet

Men (about 50% fewer claims).

bullet

Aware of impending impact and has time to brace self (primarily muscle injury).

bullet

High or fixed back seats.

bullet

Seatback breaks (less neck-axial, more low back pain).

bullet

Sitting with head positioned straight ahead.

bullet

Now wearing seat belt (i.e. 3-point restraint).

bullet

Young occupant.

bullet

Shorter occupant.

bullet

Occupant in larger vehicle or collision in which there are similar mass ratios for vehicles.

bullet

Properly positioned occupants to seat/restraint.

bullet

Rear-seated occupants (rigid seatbacks).

bullet

Spine joints and soft tissues in good health.

 

The following Report More Neck Injuries  

bullet

Women (neck longer and has smaller diameter).

bullet

Unaware of impending impact with no time to brace self (involves ligaments and disc).

bullet

Low, absent, or adjustable head restraint.

bullet

Seat does not break.

bullet

Head rotated at time of impact.

bullet

Wearing seat belt (neck and back injuries).

bullet

Elderly occupant.

bullet

Taller occupant.

bullet

Occupant in smaller vehicle or collision in which mass rations differ significantly.

bullet

Abnormally positioned occupant.

bullet

Front-seated passenger (elastic seatback).

bullet

Pre-existing degenerative joint disease or significant fibromyalgia).

 

 

 
Feel Better . . . Live Better