radionuclide kidney scan

Radionuclide kidney scan is the use of renal selective concentration and excretion of radionuclide-labeled compounds to visualize the kidneys by in vitro examination by a scanner. According to the obtained image, the position, shape, size and radioactive distribution density of the two kidneys were analyzed for comparison, and the diagnosis was made in combination with the clinical condition. When renal artery stenosis causes renal atrophy, renal scan shows that the affected kidney is smaller than normal, the radioactive distribution is sparse, and uneven. The contralateral kidney may have a modern compensatory hypertrophy. If renal artery stenosis has not caused changes in renal function, there is no significant abnormal change in renal scan. Basic Information Specialist classification: urinary examination classification: X-ray Applicable gender: whether men and women apply fasting: fasting Tips: Maintain regular routines and diet to help the inspection go smoothly. Normal value The normal kidney is located on both sides of the lumbar vertebrae, the two kidneys are very close, and the lower pole is far. The long axis of the two kidneys is "eight" shape, generally the 12th thoracic vertebrae on the kidney, and the third lumbar vertebrae on the lower pole. The normal kidney scan shows a normal kidney scan, which is oval, with a clear outline and neat edges, except for the distribution of the renal hilum. Except for sparse, the rest are evenly distributed, and there is no significant difference in radioactive distribution between the two sides. Clinical significance Abnormal results: (1) Abnormal kidney position such as renal ptosis, kidney migration. In the supine position, the kidney is in a normal position; when standing, the position of the kidney moves down with the position. If kidney function is impaired, the radioactive distribution is sparse and loses its normal form. (2) Congenital malformation Horseshoe kidney is connected to the inferior pole of the kidney, and the vertical axis is inverted "eight" shape. The radioactivity is evenly distributed, the contour is clear, and the edges are neat. Polycystic kidney disease is generally bilateral. The degree of kidney enlargement depends on the size and size of the cyst. Generally, the kidney enlargement is about normal! The kidney is 2-3 times. The scan shows that the kidney loses its normal shape, the outline is unclear, and the edge is not Neat, uneven distribution of radioactivity, patchy or sparsely rounded defects. People who need to be examined: suspected to be abnormal in the kidneys. Precautions Taboo before the examination: Maintain regular routines and diet to help the inspection proceed smoothly. Requirements for inspection: This test does not require special preparation. Generally, the prone position is taken. The patient's waist is straight and the spine is aligned with the midline of the probe so that both kidneys are within the effective field of view of the probe. After intravenous injection of the scanning agent, the scanner is used to scan the extracorporeal kidney area for a certain period of time, and the kidney pattern is directly printed or the kidney image is taken with a blinking camera. The anatomical landmarks of the spine and the tibia were made on the scan. Inspection process Kidney scan is an in vitro development in which a radionuclide-labeled compound secreted, concentrated, and excreted by the kidney is intravenously obtained, and a kidney map is obtained in a scanner to understand the position, size, shape, and internal changes of the kidneys. method. There are two kinds of static development and dynamic development. Commonly used scanning agents for static development are 99m 锝 DTPA, 113m indium ~ DTPA, 99m 锝 ~ DMSA (Dimerca - pto - Succinic dimercapto succinic acid), 99m - TMA (thiomalicacid thio succinic acid) and sulphonic acid . About 50% of the 99-day DMA injection was firmly bound in the renal cortex, so the renal cortex concentration remained stable within 1 to 5 hours, and the development was clear. 40-48% of the 99锝-TMA injection was incorporated into the renal cortex. Renal cortical visualization is also clear. The commonly used scanning agent for dynamic development is 131 iodine-o-iodine sodium urate, which is rapidly absorbed, concentrated and discharged by the kidneys. Continuously photographed with a gamma camera to obtain a continuous image of the process of absorption, concentration and discharge of the scanner by the kidneys. Not suitable for the crowd Inappropriate people: Generally, there is no suitable for the crowd. Adverse reactions and risks No related complications are harmful.