Doctor insights on:
What Does Elevated Bun 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.
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.
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.
What does having elevated total bilirubin (1.1) but low BUN (4) mean? AST was also flagged as low but I have read that isn't significant.
All ok: All these data are essentially normalGet a more detailed answer ›
Can't answer: Labs mean nothing apart from the history and physical exam. How high? How low? Reference ranges are set so that at least 5% of healthy folks fall outside. You need a good relationship with a competent physician who communicates, and you need to stop trying to match yourself with things you read on the internet. We can handle specific questions but can substitute for your personal physician.
What can cause to have bun/creatinin ratio elevated. My test resul bun 18 norma 6-20, creatinin 0.63 norma0.57-1 and bun/creat ratio 29 norm 35-155?
If both your: BUN and creatinine are normal, ratio is probably not meaningful number. Ask your doctor who ordered the tests, but I am not concerned too much.
See details: Elevated levels of BUN and creatinine signify reduced kidney function. The higher the values, the more compromised the kidney function.
Need correct value: And units. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, it would have helped to know the correct result. 23h is not the conventional reporting of BUN results. If it is 23 mg/dL, it is slightly above normal and you should discuss it with your doctor.
Blood urea nitrogen: Or bun, is an indicator of kidney function, fluid balance, muscle turnover (breakdown and rebuilding). Normal BUN is between 7 and 20. A low BUN could be seen in a person with lower muscle mass or low muscle use (ex a paraplegic person) where there is less muscle turnover than in more active people. This could also suggest malnutrition. A low BUN could also be seen in liver failure, pregnancy.
Means normal kidneys: BUN (blood urea nitrogen) is a test for a number of certain chemicals in the blood. Creatinine is a specific chemical that is released from the muscles. These are filtered out by the kidneys into the urine. The ratio of 18 means 18 to 1 of BUN to creatinine ; it is normal. If the ratio is higher that means the circulation is not delivering blood fast enough to the kidneys. If the ratio lowers to 1.
Nothing: Assuming you're otherwise well. Having a nice steak dinner can do this, since you metabolize protein into urea which is what BUN measures. Don't overfocus on your labs. They're meaningful only as a guide in a larger context of the entire person.
Actual values: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, if both creatinine and BUN are normal you do not need to worry about the ratio.
Need numbers: It would help to have the actual numbers. The doctor who ordered these tests would be in a better position to advise as s/he knows your health status.
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