If a factor in raising the productivity of labor is not used in the production process, it is referred to as a reserve for increasing labor productivity. Reserves are classified according to their association with a particular production process, an economic sector, or the national economy.
Definition. 1  Urinary catheterization is the insertion of a catheter into a patient's bladder. The catheter is used as a conduit to drain urine from the bladder into an attached bag or container.
A catheter is inserted into the urethra to the bladder so dye can be injected. As the bladder is filling with this dye, X-rays are taken in various positions and various time intervals. The catheter is then removed and additional X-rays are taken while the patient urinates into a container. Once the bladder is emptied, a final X-ray is taken.