Temperature Measurement Standards. ASTM's temperature measurement standards provide the material and property specifications, as well as guides for the testing, calibration, and use of laboratory, industrial, and clinical instruments used in the determination of thermal variables, particularly temperature.
A bulging disc occurs more often as we age or as repetitive activities weaken the the disc. Herniated discs are more often specifically related to trauma/injury sustained and are more acute (sudden) in onset.
Discussion. An important, frequently difficult to diagnose, type of disc herniation is a free disc fragment or sequestered disc herniation. A sequestered disc herniation occurs when extruded disc material is no longer contiguous with the parent nucleus pulposus.iscussion. An important, frequently difficult to diagnose, type of disc herniation is a free disc fragment or sequestered disc herniation. A sequestered disc herniation occurs when extruded disc material is no longer contiguous with the parent nucleus pulposus.