Field clearance is perfectly sound on most of the time, if it is "performed properly" like others described. I do not which one is worse improper immobilization or none at all ? Very few times I see C-collars applied properly. Most do not realize, even applying a cervical collar, it really is not an immobilization device, rather more a splint, reminding us there is a "potential" injury.
Mechanism of injury, pain, should automatically be the precursors of immobilizing.
Just like many other treatments, we do not justify performing much of what we do. Healthy patients falling with no indication of other pain or injuries, but most EMT's will LSB, CID etc.. again, no reason or justification why it is done except .."this is what we were taught".. Traditional treatment has been handed down for years. Even the reason for us immobilizing in the field was from the study of the "white papers" (origination of EMS) of "ambulance attendants.. pulling patients from cars and through windows thus spinal injuries occurring"...Not realizing years later, that LSB can actually produce damage as well, as preventing potential injuries.
One has to have sound guidelines, experience, and proper education of assessment in clearing C-spine, much rather error on the patient if any suspicion C-spine injuries.
Here is a article in regards of studies and discussion of field clearance.
http://www.emsresponder.com/publication/article.jsp?pubId=1&id=3350
R/r 911