با اولتراسونوگرافي تشخيصي )L5 و S1( و )L4-L5( اندازه گيري اقطار كانال نخاعي طبيعي در سطوح ساژيتال و كرونال در سطح ديسك هاي بين مهره اي

Measurement of the Normal Sagital and Coronal Lumbar Spinal Canal Diameter at t he (L4-L5) a nd (L5-S1) Intervertebral Disk Space with Diagnostic Ultrasound

High resolution real time ultrasonography is a non - invasive, simple, and safe and has a high degree of accuracy for measurement of spinal canal diameter. Also diagnostic ultrasound can demonstrate the degree and extent of bony spinal canal steno sis. It may have value in preventive medicine, identifying the subject at risk. Measurement with this technique on segments of lumbar spinal canal revealed that the ultrasound echoes originated from boundaries between the dural sac and the surrounding tissues at the level of intervertebral disc. The width of lumbar spinal canal as reflected by the ultrasonic echoes was about one millimeter less than the normal width of the dural sac. The aim of this study was to find out the normal sagital and corona) lumbar spinal canal diameter. For this purpose research was conducted on the 400 patients, and carried out from (May 1998) through (sep. 1999) that referred for abdominopelvic ultrasonography to no I hospital of Kerman University of Medical Sciences and Health Services. A prospective cross - sectional and continuative study was done. in the research 182 female (45.8%) and 218 were male (54.2%). The mean sagital and corona) spinal canal diameter at (L4-L5) disc space level was (11.7+2mm) and (15±2.8mm) respectively. The mean sagital and corona) spinal canal diameter at (L5-S1) level was (11.7±2.1mm) and (16.1±2.8mm) respectively. The significant difference between male and female was only at coronal diameter of (L5-S1)