Vol. 4, Issue 12, Part A (2018)

Abstract
The conus medullaries or "medullary cone" is the terminal end of the spinal cord and it is enclosed in a sac known as the dural sac (DS). After the invention of MRI, scientists found that there is wide range of termination of dural sac. The DS ending is most relevant to many clinical procedure. This is an observational study included MRI images of 71 adult individuals in the age group of 20-65 years of with 38 males & 33 females. MRI of whole spine of patients were performed. The most caudal level of the conus medullaris & dural sac was determined in relation to the adjacent vertebra and disc space with the help of di com works software. In total no of 71 cases Dural sac termination occurs around S1 & S2 vertebral level. Max no of termination occurs at S2- Lower level in 29.58% then 25.35% at S2-middle level. The present study is an attempt to provide data base for a range of termination of spinl dural sac, on MRI. Which is helpful in clinical procedures like lumbar puncture and accurate localization in cranial spinal irradiation & anaesthesiologist practicing regional anaesthesia.