Search results
Results from the WOW.Com Content Network
Reference ranges for urine tests are described below: Measurement Lower limit Upper limit ... Red blood cells (RBCs) 0 [4] [2] 2 [2] - 3 [4] per High Power Field (HPF ...
Under the microscope, normal red blood cells (RBCs) appear as small concave discs. Their numbers are reported per high-power field. [ 96 ] In highly concentrated urine they may shrivel and develop a spiky shape, which is termed crenation , while in dilute urine they can swell and lose their hemoglobin , creating a faint outline known as a ghost ...
The normal number of red blood cells in urine should not usually exceed 3 per high power field. [13] A urine test strip showing positive for blood can also indicate hemoglobinuria, which is not detectable using a microscope due to the lysis of red blood cells in the urinary tract (particularly in alkaline or dilute urine), or intravascular ...
To be in the intermediate risk category, one must satisfy any of the following criteria: Has smoked 10–30 pack-years; is a female 50–59 years old or a male aged 40–59 years old; has 11–25 red blood cells per high power field; or was previously a low-risk patient with persistent microscopic hematuria and has 3–25 red blood cells per ...
Hemoglobinuria is a condition in which the oxygen transport protein hemoglobin is found in abnormally high concentrations in the urine. [1] The condition is caused by excessive intravascular hemolysis, in which large numbers of red blood cells (RBCs) are destroyed, thereby releasing free hemoglobin into the plasma. [2]
Hematuria (red blood cells in the urine) [11] Proteinuria (protein in the urine) ranging from sub-nephrotic (<3.5 g/day) to >10 g/day, [7] although it is rarely above nephrotic range proteinuria levels. [12] Hypertension [13] resting blood pressure is persistently at or above 130/80 or 140/90 mmHg. [14] Blurred vision [4]
The value of urine for diagnostic purposes has been recognized since ancient times. Urine examination was practiced in Sumer and Babylonia as early as 4000 BC, and is described in ancient Greek and Sanskrit texts. [2] Contemporary urine testing uses a range of methods to investigate the physical and biochemical properties of the urine.
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.