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Auxiliary examination of acute renal failure

2016-12-27 16:58

Patients with acute renal failure need to do many checks, but many people are not particularly clear, understand. Because some checks are auxiliary examination, may not be very understanding, in fact, when we checked out the necessary checks, but also with some auxiliary examinations, here to introduce you and acute renal failure need to do some tests.
Urine examination. Oliguria, urine is less than 17ml/h or <400ml/d, <1.014 or even lower proportion of urine, fixed in 1; post burn acute renal failure 10, urine is acidic, qualitative urine protein + ~ + + +, microscopic examination of urinary sediment visible coarse grain canal, a red and white blood cells.
Two, nitrogen. Elevated blood urea nitrogen and creatinine. However, endotoxemia cannot be used alone as a diagnostic basis, because of normal renal function in patients with gastrointestinal bleeding may also increase urea nitrogen. Increased serum creatinine, blood urea nitrogen and serum creatinine were less than or equal to 10 is an important diagnostic index. In addition, urine / blood urea 15 (normal urea in urine 200-600mmol/24h, urine / blood urea >20), urine and serum creatinine were less than 10 have diagnostic significance.
Three, blood examination. Erythrocyte and hemoglobin decreased, leukocytosis increased, thrombocytopenia. Potassium, magnesium and phosphorus in blood increased, normal or slightly reduced serum sodium, calcium decreased, carbon dioxide combining power is also reduced.
Four, urinary sodium. >30mmol/L. Determination of filtration sodium excretion fraction, this method has certain significance to the cause. The value of >1 was acute tubular necrosis, non oliguria acute tubular necrosis and urinary obstruction. The value of <1 is that of pre renal interstitial nephropathy and acute glomerulonephritis.
Five, pure water. Determination of clearance: this method is helpful for early diagnosis. Pure water clearance rate = urine volume (1 hours) (1- urinary osmolality / blood osmotic pressure). Its normal value is -30, the greater the negative value, the renal function is super good; the closer to 0, the more serious renal function.
(-25 ~ -30: indicating that renal function has begun to change; -25 ~ -15: description of renal function mild, moderate damage; -15 ~ 0: indicating severe impairment of renal function
On acute renal failure of auxiliary examination the contents of the above is the expert to introduce, including uronoscopy, azotemia, blood tests, urine sodium and water several quantitative examination, in the treatment of acute renal failure, we can map do not check, this is not conducive to the treatment of kidney disease.
What are the symptoms of kidney failure?
Because of the early symptoms of renal failure is not obvious, patients are often unable to find the first time, the loss of some or all of the pathological state of renal function. So, renal failure early will have what typical symptoms appear? Early symptoms of renal failure are 1 hematuria. Generally many patients will appear hematuria phenomenon, in the occurrence of hematuria at the same time, generally without pain or other symptoms. Hematuria is often intermittent, after a period of time will stop, but will happen repeatedly. So in the first hematuria cause attention, early medical treatment, you can get early diagnosis.
2 a small number of patients with renal failure will appear waist block: renal failure lesions increased to a considerable extent from the waist or upper abdomen touch (or see) block. About 20% ~ 30% of patients with renal failure will have this symptom. Mass is easy to touch in the lateral decubitus position, sometimes also can see the package with the upper and lower respiratory movement. If the package block and the surrounding tissue adhesion, then block fixed, can not be pushed, it belongs to the late.
3 low back pain. How can we find the symptoms of renal failure earlier, probably more than 50% of patients will appear lumbago phenomenon, this phenomenon is easy to be misdiagnosed by patients, so for patients should be cautious. Low back pain is the result of enlargement of renal capsule or oppression of peripheral nerve and muscle tissue. More for the waist or epigastric pain. I have a blood clot down discharge severe angina, may be mistaken for renal and ureteral calculi.

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