These days, it's not uncommon for a doctor to prescribe magnetic
resonance imaging (MRI) to produce a two-dimensional view of the spinal cord.
But what about an MRI for your cat or dog?
In Part 1 of this series, I described how Bonnie, my seven-year-old beagle,
was diagnosed with a degenerative disc problem. Eventually, our local vet determined
that Bonnie needed surgery instead of long-term medication that would just mask
the pain. But was surgery the right
decision?
There are several diagnostic tools that a veterinarian can
use to pinpoint what's wrong with your pet It's important for your vet to use
the right tool, especially if surgery may be necessary. After all, would a
doctor send a patient to spinal surgery with only an X-ray to work from? Probably
not. Similarly, your pet will also need a full workup (aside from the standard
blood tests required for anesthesia).
Here are some of the common diagnostic tools used for
pinpointing disc and spinal problems in dogs:
- X-Ray - This is usually the first
tool used by your vet. It shows "changes" (or problems) with hard tissue.
- Myelogram - This is an X-ray that
uses a contrast liquid to examine the spinal cord. It requires anesthesia and
can be used to check for problems with the spinal cord itself.
- CT Scan - This technique requires
anesthesia CT scans show both hard and soft tissue, but can have poor picture
quality compared to other tools.
- MRI Scan - Anesthesia is required.
MRIs show soft tissue and are very detailed.
X-rays can be performed with or without anesthesia. It all depends
on how cooperative your pet is. If the
animal won't lie still, the image won't come out very well. The other three
types of diagnostic tools are usually performed immediately before surgery,
when the animal is already under anesthesia. If you're whether surgery is
necessary, these techniques can be performed in advance. Remember, however,
that every time a pet is placed under anesthesia, there is some risk involved -
especially with older animals.
My own beagle, Bonnie, was referred to one of the top small-animal
surgeons in our area. First, we scheduled an appointment in which the vet met
Bonnie and told us about the procedure. Because we knew that Bonnie's condition
wouldn't go away on its own, we booked our dog for the $2,500 surgery two weeks
later. The MRI that she received when she was anesthetized for the procedure
showed that one of the discs was displaced and the other was ruptured. So, it
looked like choosing surgery for Bonnie was a wise decision.
So how do you repair a ruptured disc in a dog? Check back next week for details on surgery
and recovery.
Resources:
http://www.allaboutbackandneckpain.com/learn/diagnostics/
http://cal.vet.upenn.edu/projects/saortho/chapter_62/62mast.htm
|