For treatment, recurrence monitoring: When CEA levels are initially elevated and then decrease to normal after therapy, it means the cancer has been successfully treated. A steadily rising CEA level is often the first sign of tumor recurrence. CEA test may be used in combination with other tumor markers in the evaluation of cancer. Not all cancers produce CEA, and a positive CEA test is not always due to cancer. Therefore, CEA is not recommended for screening the general population.
Tan Delta is also known as the 'loss angle' or 'dissipation factor'. It is used to test the level of degradation in insulation materials of electrical machines and power cables. Tan Delta, also called Loss Angle or Dissipation Factor testing, is a diagnostic method of testing electrical equipment to determine the integrity of the insulation. This is done to try to predict the remaining life expectancy of the equipment.
Partial stroke testing (or PST) is an accepted petroleum industry standard technique and is also quantified in detail by regulatory bodies such as the International Electrotechnical Commission (or IEC) and the Instrument Society of America (or ISA).The following are the standards appropriate to these hotbodies.n addition to ESDVs PST is also used on High Integrity Pressure Protection Systems or HIPPS. Partial Stroke Testing is not a replacement for the need to fully stroke valves as proof testing is still a mandatory requirement.