The problem of fluid motion in a renal tubule, in contrast to ordinary flow through cylinder with the impermeable wall, is complicated by the existence of radial velocity generated by reabsorption process. It has been experienced that due to some abnormality the porosity of wall may get hampered in turn radial velocity may become periodic. The main objective of this paper is to read the behaviour of blood flow through renal tubule in case of periodic radial velocity component. It is the fact that the radial component of velocity of blood is responsible to balance the salt concentration between dialyzate and blood stream. Our analysis shows that the blood flow pattern changes and flow is not smooth.