The diseases have been categorized as patches (cause dead spots or patches in the lawn), rings (cause rings of dead or affected grass), or leaf blight (affect individual blades of grass, often over a wide area and no distinct patch or ring pattern may be noticeable).
PVR, abbreviation for pulmonary vascular resistance. To measure changes in blood vessel size or changes in gas volume in the lungs to assist in diagnosing diseases such as deep vein thrombosis (DVT), chronic obstructive pulmonary disease (COPD), and some peripheral vascular disorders. Veins, arteries, and lungs. None.
Post Residual Void (PVR) is the amount of urine left in your bladder after using. the restroom. There are two ways to measure PVR. Ultrasound Post Void Residual. This test is performed to measure the amount of urine that is left in your. bladder after you have made attempt to empty it completely. The test is done with ultrasound. After using the bathroom you will lie flat on. the exam table with the surface of your lower abdomen and pelvis exposed.