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1) how is it diagnostic to use nerve block injection, and to confirm pain source cause, how based on findings that impacts treatment, the scenarios?
2) why injecting one and not both sides?
3) mechanical etiology meaning? 4) meaning of morphological changes?
5) how it’s possible to have temporary or transient cord contact?
6) nerve impingement in hand and 4th 5th digits inconsistent with disk level impacted.
Reasons, all other carpal tunnel Etc ruled out.. ?I will assume that the ACDF (fusion of C5-6) is solid. C4-5 with a disc bulge can cause local neck pain. There is no report of nerve compression (“The ACDF artifact obscures the anatomy, though no posterior is suspected”).
There is effacement of the cord at C4-5 without stenosis (narrowing) of the canal. Generally, this condition is non-symptomatic. Even if there was compression of a nerve root, at this level the nerve would be C5 which does not travel down to the hand where you have symptoms.See symptoms of cervical nerve injuries on this website to understand these symptoms.
The way to diagnose pain generators is to “numb” the suspected site temporarily and look for temporary relief (see SNRB/ESI and Pain diary to understand these concepts). This works for nerves and facets but does not work for disc or bone pain. To diagnose discs, a cervical discogram would be required.
Injections that create pain or change pain location can occur from a volume phenomenon. The “fluid wave” that occurs with an injection can cause a pressure phemonemon. This is minimized by a very slow introduction of this fluid to prevent pressure build-up.
Headaches commonly originate from the upper cervical facets (including C1-2) which are rarely injected diagnostically.
Dr. Corenman
PLEASE REMEMBER, THIS FORUM IS MEANT TO PROVIDE GENERAL INFORMATION ON SPINE ANATOMY, CONDITIONS AND TREATMENTS. TO GET AN ACCURATE DIAGNOSIS, YOU MUST VISIT A QUALIFIED PROFESSIONAL IN PERSON.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books. -
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