Proximal tubule involvement

Introduction An elongated epithelial tubule connected to the wall of the renal capsule has reabsorption and excretion. The renal tubule is divided into three parts according to different morphological structures, distribution position and function; proximal tubule, thin segment and distal tubule. The proximal tubule can be divided into a straight portion and a curved portion. Its curved part, also known as the proximal convoluted tubule, is located in the cortical labyrinth and is highly distorted near the renal corpuscle.

Cause

The function of the proximal tubule is that reabsorption is hindered. Also caused by the imbalance of transport, pay attention to check the endocrine situation, look at the stomach, how to have diarrhea, stomach and stomach, adjust due to sleep on time, do not eat more salt, exercise more fruits and vegetables, check the liver and kidney function Look at the adrenaline, the proximal convoluted tubules have the function of reabsorption and secretion.

an examination

Related inspection

Renal MRI examination kidney CT examination kidney ultrasound examination

The function of the proximal tubule is that reabsorption is hindered. Cause abnormal gastrointestinal disharmony, adrenal abnormalities, etc., check the hematuria, see if there is abnormal renal dysfunction, blood routine urine routine, see if there is abnormal abnormal bowel movement, the absorption of the kidney directly affects the body's excretory function Should pay attention to daily activities, enhance physical fitness is very important, to ensure a comfortable and normal sleep.

Differential diagnosis

1. Near-curved tubule: The small cystic cavity on the tube is the thickest segment of the renal tubule, which is surrounded by the renal corpuscle. The wall of the tube consists of a single layer of cubic epithelial cells. The small and irregular lumen is an important part of the renal tubular reabsorption function. The free surface of the cell has a bristled edge. It can be seen under the electron microscope that the bristle edge is composed of microvilli. These structures all expand the cell surface area and facilitate reabsorption.

2. Medullary descending branch and ascending branch: The medullary iliac crest is a U-shaped small tube composed of three segments: the first segment is the descending thick segment; the second segment is the U segment in the thin segment; the third segment is the ascending segment . The descending parts of the first and second paragraphs are collectively referred to as the descending branch, and the second section of the ascending branch and the third section are collectively referred to as the ascending branch. They consist of flat and cubic epithelium, respectively. The length of the nephron spasm in different parts is different. The cortical nephron has a shorter medulla and a thin wall segment that is short or absent. The myelin of the proximal myeloid unit is longer and has been deep into the medulla to reach the cone nipple. This type of medulla has a special function for the concentration of urine.

3. The distal convoluted tubule is shorter: the convoluted coil is in the vicinity of the adjacent renal corpuscle, adjacent to the proximal convoluted tubule. The wall of the tube is composed of cuboidal epithelial cells with large and regular lumens. Its end is connected to the collecting tube. The medullary and distal convoluted tubules are collectively referred to as the distal nephron.

4. Collecting tube: The collecting tube is a small tube from the cortex to the medullary cone nipple hole. There are many nephron tubules connected to it along the way, the tube diameter gradually becomes thicker, and the tube wall gradually becomes thicker. The wall of the tube consists of a cubic or columnar epithelium. In the past, it was thought that the collecting tube only had the function of transporting urine. It is believed that the collecting tube also has the function of reabsorption and secretion as well as the distal convoluted tube.

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