Discography
What
are the discs?
The discs are soft, cushion-like pads, which
separate the hard vertebral bones of the spine. A disc may be painful when it
bulges, herniates, tears or degenerates and may cause pain in the neck, mid-back,
low back and arms, chest wall, abdomen or legs. Other structures in the spine
may also cause similar pain such as the muscles, joints and nerves. Before performing
discography, it has usually been determined that these other structures are not
the sole source of pain in a patient (through history and physical examination,
review of x-rays, CTs/MRIs and/or diagnostic injection procedures such as facet
injections, sacroiliac joint injections and/or nerve root blocks).
What
is discography and why is it helpful?
Discography confirms
or denies the disc(s) as a source of pain. This procedure involves the placement
of a needle into the discs themselves, utilizing x-ray guidance and injecting
contrast (dye). CTs and MRI scans only demonstrate anatomy and cannot absolutely
prove a patient's pain source. In many instances, the discs may be abnormal on
MRI or CT scans but not a source of pain. Only discography aids in telling if
the disc(s) are a source of pain. Therefore, discography is done to identify painful
disc(s) and help the surgeon plan the correct surgery or avoid surgery that may
not be beneficial. Discography is usually done only if a patient's pain is significant
enough for them to consider surgery. When multiple disc levels need to be assessed,
the discography procedure will be scheduled as a series of 2-3 procedures on 2-3
different dates.
What happens during the procedure?
An IV is started so that antibiotics (to prevent infection)
can be given prior to the procedure and other medication, if indicated, can be
given during the procedure. The patients lie on their stomach on the x-ray table
for discography. The skin on the back is cleansed with a sterile solution called
Betadine. Next, the physician injects a small area of skin with numbing medicine.
This medicine stings for several seconds. After the numbing medicine has been
given time to be effective, the physician directs a small needle, using x-ray
guidance into the disc(s) space. Patients generally feel temporary discomfort
as the needle passes through the muscle or near a nerve root. After the needles
are in their proper locations, a small amount of contrast (dye) is injected into
each disc.
IV (Intravenous) Conscious Sedation
Medication
will be given during the procedure through the IV to make it easier for you to
tolerate the procedure by helping you to relax and be less anxious. The medication
will not "put you to sleep". You will be able to breathe on your own
and respond verbally and physically. This type of medication does involve some
potential risks: allergic reaction, slow breathing, low blood pressure, slurred
speech, extreme drowsiness. Severe response could include stopped breathing or
unarousable sleep.
General Pre/Post Instructions
Patients can eat a light meal before the procedure. If a patient
is an insulin dependent diabetic, they should take their insulin and eat prior
to the procedure. Patients may take their routine medications prior to the procedure
(e.g. high blood pressure and oral diabetic medications). If a patient is on Coumadin,
Lovenox, or Plavix (blood thinners) they should notify the office so that dosing
may be individualized, if necessary, according to the patient's diagnosis. If
you are allergic to iodine, contrast, or medical dye, please inform the office.
Patients can expect to be at that facility approximately 3-1/2 hours.
A driver must accompany the patient and be responsible for getting them home.
It is best if no driving is done the day of the procedure and after the injection.
Patients may return to their normal activities the day after the procedure, including
returning to work unless instructed otherwise by their physician.
