The normal kidneys are stable in the retroperitoneal site due to the fixation of the perirenal fascia , the fat capsule , the kidney pedicle and the abdominal pressure , but the normal kidney can also have a certain range of activity , such as 2 - 5 cm up - and - down movement during respiration , and the posture change of the prone position and the standing position can also have an activity range of 1 cm .
If the scope of renal activity is too large, the location of the kidney when the position is too low, the scope of activities of more than 3 cm is the drooping of the kidneys, if the activities of the large distance of the kidney, across the midline to the contralateral is to walk the kidneys.
Ultrasound performance: prone position or supine position, to the extreme fixed under the kidney, and then taken as, if the lower pole of the kidney to move more than 3 cm or more than one vertebral body that is, drooping. Larger range of activities of the kidneys, changing position can be moved to the contralateral abdomen, that is, walking kidney.
Kidney ptosis and migratory kidney generally no obvious symptoms, and some may have low back pain or lumbago, increased labor or standing legislation, and some will touch their own lumps in the abdomen, bringing unnecessary tension through the ultrasound can Confirmed renal ptosis and wandering kidney. Most renal ptosis and wandering kidney do not need treatment.
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