3 doctors weighed in:

Why is bun and creatinine elevated in pneumonia?

3 doctors weighed in
Dr. Martin Raff
Internal Medicine - Infectious Disease
2 doctors agree

In brief: Renal insufficiency

The BUN and creatinine should not be elevated due to the pneumonia unless the pneumonia is non-bacterial (autoimmune), or due to group a strep pyogenes strains that induce glomerulnephritis.
Generally the BUN and cr will be elevated in febrile patients with infection when they are dehydrated and corrects rapidly with fluid replacement. Also in septic shock there may be acute tubular necrosis.

In brief: Renal insufficiency

The BUN and creatinine should not be elevated due to the pneumonia unless the pneumonia is non-bacterial (autoimmune), or due to group a strep pyogenes strains that induce glomerulnephritis.
Generally the BUN and cr will be elevated in febrile patients with infection when they are dehydrated and corrects rapidly with fluid replacement. Also in septic shock there may be acute tubular necrosis.
Dr. Martin Raff
Dr. Martin Raff
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