Renal blood flow diagram

The renal blood flow map is an auxiliary examination method for checking whether the kidney is normal. After intravenous injection of the radioactive tracer through the kidneys, the time-radioactivity curves of the two kidneys were detected and recorded using a nephrograph or SPECT. The commonly used tracers are I-o-Io-uric acid (I-OIH), Tc-DTPA, Tc-EC, Tc-MAG3, etc. and can be processed by computer to obtain the time-radioactivity curves of the kidneys respectively, which are reflected in the glomerulus and The filtration rate of renal tubular function and the value of renal effective plasma flow. Mainly used for the diagnosis of urinary tract obstruction, the choice of nephrectomy subjects, such as renal tuberculosis have a side of the non-functional kidney map, can be used as an indication for surgical resection. Monitor the transplanted kidney and check for ischemia of renal hypertension. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Tips: Maintain normal sleep and diet. Normal value The normal kidney map is divided into three sections, namely the tracer emergence section (a section), the aggregation section (section b), and the drainage section (section c). After the intravenous injection of the imaging agent, the a segment began to rise sharply, and then the b segment rapidly ramped up, reaching a peak within 5 minutes, and then a falling C segment appeared. After a segment of injection, the abrupt rise of the segment, 60% of its height comes from the extrarenal vascular bed, 10% from the intrarenal vascular bed, 30% from the renal parenchyma, if the renal artery is inconsistent on both sides, then the a kidney can appear difference. Section b reflects the ability of renal parenchyma to ingest and accumulate, reflecting glomerular filtration rate and renal effective plasma flow, and the current urinary tract obstruction can also adversely affect this segment. The c-segment curve drops from the peak, starts faster, and then is slightly slower. The falling slope reflects the speed of the developer expelling with urine, and the peak height is closely related to the urine volume and urinary patency. Clinical significance Abnormal results: reduced cardiac output, renal arterial lesions, renal dysfunction. People who need to be examined: suspected of abnormal kidneys. Precautions Taboo before check: Maintain normal sleep and diet. Requirements for examination: The patient should actively cooperate with the doctor and the doctor should check it carefully to avoid the result. Inspection process Intravenous injection of the appropriate amount of 131 I. iodine uric acid sodium, using it to quickly pass the principle of renal secretion and excretion, respectively determine its time and radioactivity in the kidney through the renal artery, renal tubules and urethra, traced to the curve is the kidney Figure. Mainly used for the determination of renal function. Observing functional changes before and after treatment such as chronic nephritis, chronic pyelonephritis and renal tuberculosis can be used to monitor the efficacy. Not suitable for the crowd Inappropriate people: Generally, there is no suitable for the crowd. Adverse reactions and risks No related complications or hazards.

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