The protein secreted by renal tubular epithelial cells forms a clear tubular pattern due to concentration and coagulation in an acidic environment. If it is accompanied by coagulation of red and white blood cells, it is called cellular tubular. If there is degenerative cellular debris, granular tubules are formed. If the tubular matrix contains fat droplets or embedded epithelial cells containing fatty degeneration, it forms a fatty tubular pattern. The tubular pattern is an important component of the urine sediment, and its presence often indicates substantial renal damage. It is a cylindrical structure formed by the coagulation of proteins in the tubules and collecting ducts of the urine, the formation of which requires proteinuria and the formation of a matrix of T-H glycoprotein, which was further confirmed by Mcqueen in 1966 using a fluorescent antibody method, showing that various proteins of different molecular weights in plasma can coagulate as particles on a matrix of transparent tubulars (T-H glycoprotein). In pathological conditions, due to the increased permeability of the glomerular basement membrane, a large amount of protein enters the tubules from the glomerulus. In the distal tubules and collecting ducts, the protein coalesces and precipitates in the tubular lumen and forms tubular forms due to concentration (water absorption) acidification (increased acidity) and the presence of chondroitin sulfate.