Why is bun and creatinine elevated in pneumonia - Doctor answers

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Why is bun and creatinine elevated in pneumonia?

Why is bun and creatinine elevated in pneumonia?

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. ...Read more

Dr. Madhu Kandarpa
2,219 Doctors shared insights

Creatinine (Definition)

Creatinine is a byproduct of creatine phosphate, which is present in muscles. Creatinine levels increase if the ...Read more


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How is elevated bun related to pneumonia?

How is elevated bun related to pneumonia?

Elevated BUN: Elevated BUN represents a strained kidney most likely secondary to dehydration. Pneumonia is a significant illness that often leads to fever and dehydration. ...Read more

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Low creatinine and elevated bun/creatinine ratioplease interpret?

Low creatinine and elevated bun/creatinine ratioplease interpret?

Stop worrying: Low creatinine is never a health concern. Reference ranges are set so that a few percent of healthies fall outside on either end. The ratio can be up if you're a little thirsty or ate a protein-rich meal lately. ...Read more

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What causes elevated bun/creatinine ratio?

Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body.
Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible. ...Read more

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What causes elevated bun/creatinine ratio?

What causes elevated bun/creatinine ratio?

Many causes: Blood tests called BUN (blood urea nitrogen) and cr (creatinine) are often checked to help evaluate kidney function. The normal bun/cr ration is about 10:1 to 15:1. Some of the more common causes of an elevated bun/cr ratio are: dehydration, GI bleeding, increased protein intake, small amount of muscle mass, increased muscle breakdown. ...Read more

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What causes an elevated bun/creatinine ratio?

Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body.
Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible. ...Read more

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What does an elevated bun/creatinine ratio mean?

Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body.
Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible. ...Read more

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Low creatinine and elevated bun/creatinine ratio. Please explain?

Decrease in flow.: Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body.
Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not intrinsic kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal-reversible. ...Read more

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How does bun and creatinine gets elevated due to dehydration? Kindly explain how?

How does bun and creatinine gets elevated due to dehydration? Kindly explain how?

Concentration: Simplest way, if you have lets say 100 particles in 5 liter of fluid, the concentration is 20 per liter. If you now have only 3 liter of fluid, the concentration is now 33.3. ...Read more

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Hi my 4y son has BUN 12, Creatinine 0.26 which is normal however his BUN/Creatinine Ratio is 46. Why would it be elevated?

Has no importance: The value of this ratio does not become important when the creatinine level is so low (but normal) in early childhood. It is only when the body mass has matured and the creatinine level rises that it can have any significance. Please do not freak over pre-printed lab reports generated by a computer. It is truly not an issue. ...Read more

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Healthy 35 yr old female w B/C ratio elevated at 23 with normal Bun and creatinine level of 16 (ref range 7-18) and 0.7. I did not drink much that day?

Healthy 35 yr old female w B/C ratio elevated at 23 with normal Bun and creatinine level of 16 (ref range 7-18) and 0.7. I did not drink much that day?

Tests, tests, tests: Tests results always have to be interpreted in a context. When they measure the temperature of the winner of the Boston Marathon 2 yrs ago it was over106 F. Was he very ill? NO! He had been using his bodies muscles at full output for over 2 hrs straight. The heat generated raised his body temp a lot and he soon cooled off. You hv to talk with yr doc or make a virtual consult. ...Read more

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Which pharmacokinetic process would be affected by elevated creatinine and bun levels?

Depends on drug: Many drugs are excreted by the kidneys and doses of those drugs need to be adjusted in people with elevated BUN/Cr. ...Read more

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What means an elevated BUN to creatinine ratio of 24 if both BUN and Creatinine are individually normal? BUN: 17.7, Creat: 0, 75. Take many fluids. Txs

Elevated ratio: Hi Oskcar. You lab levels are normal and your ratio is high due to your low creatinine level. If you had a high BUN-creatinine ratio that was abnormal due to dehydration, your serum sodium and chloride would be high. You did not mention those values in your test results. Were they elevated? If not, you need not worry, if they were, ingest more fluids to reduce them and lower your ratio. ...Read more

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What means bun/creatinine ratio and elevated alt?

Renal and liver test: Alt-liver enzyme-c priors.
Bun=blood urea nitrogen, byproduct of proteins ingested, if rise to high levels due to kidney problem, can cause toxic affects on the body.
Creatinine= measurement of renal function. Normal bun/cr ratio about 10. The higher that ratio, the more likely it is not kidney disease per se, but reduction in blood flow or volume to kidney, like when on strong diuretic-prerenal. ...Read more

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What results in an elevated bun level with a normal serum creatinine?

What results in an elevated bun level with a normal serum creatinine?

See below: An elevated BUN with normal creatinine occurs most commonly in dehydrated individuals and is not a sign of kidney damage.It may also occur in in certain other conditions like bleeding in the intestines, artificial nutrition intravenously of Amino Acids and use of steroids. ...Read more

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Which etiology results in an elevated bun level with a normal serum creatinine level?

Which etiology results in an elevated bun level with a normal serum creatinine level?

Multiple causes: BUN is a breakdown of ingested protein, but becomes elevated compared to creatine, in cases of increased catabolism (breakdown). Such things as a high protein diet, use of some steroids, some infections, or volume depletion may commonly raise BUN levels. In a hospital setting, tube feeding, tpn, GI bleeding, infections, decreased flow to the kidneys, and use of steroids are frequent contributors. ...Read more

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What causes an elevated bun/creatinine ratio on your lab results?

Dehydration: Is most common cause of high BUN with normal creatinine (therefore high ratio). Other causes can be high protein load in the diet, muscle injury or muscle breakdown (bun is formed by the breakdown of proteins). Whether to worry depends on how high the BUN is, and the circumstances when the test was drawn. Talk to the doctor who ordered the test for personalized interpretation. ...Read more

Dr. Michael DePietro
2,227 Doctors shared insights

Pneumonia (Definition)

An inflammation of the lungs, most ...Read more