Thank you for your reply,
Rhabdomyolysis is basically a break down of muscle. Sometimes this condition can cause damage to the kidneys but if it was caught and treated on time, it may not result in any damage to the kidneys (which is probably why your kidney function and ultrasound was normal).
There are many different conditions and causes for rhabdomyolysis - medications can cause it, high fever, trauma, seizures, and many other causes.
Rhabdomyolysis is a transient condition which is corrected in the hospital with hydration. If you had an episode of it in July of 2006 and it was treated, you no longer have the condition. This condition does not make you more susceptible to pressure sores and does not complicate the healing process.
I hope you find this information helpful. Please feel free to follow-up with any other questions you might have.
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Best wishes and good luck,