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To assess the adequacy of a complete collection, one always calculates the amount of creatinine excreted over a 24-hour period. This amount varies with muscle mass and is higher in young people/old, and in men/women. An unexpectedly low or high 24-hour creatinine excretion rate voids the test.
The normal range of GFR, adjusted for body surface area, is 100–130 average 125 (mL/min)/(1.73 m 2) in men and 90–120 (mL/min)/(1.73 m 2) in women younger than the age of 40. In children, GFR measured by inulin clearance is 110 (mL/min)/(1.73 m 2 ) until 2 years of age in both sexes, and then it progressively decreases.
The typical human reference ranges for serum creatinine are 0.5 mg/dL to 1.0 mg/dL (about 45 μmol/L to 90 μmol/L) for women and 0.7 mg/dL to 1.2 mg/dL (60 μmol/L to 110 μmol/L) for men. The significance of a single creatinine value must be interpreted in light of the patient's muscle mass.
Muscle paralysis [22] Failure of kidneys to remove excess fluid may cause: Swelling of the hands, legs, ankles, feet, or face; Shortness of breath due to extra fluid on the lungs (may also be caused by anemia) Polycystic kidney disease, which causes large, fluid-filled cysts on the kidneys and sometimes the liver, can cause: Pain in the back or ...
Out of the 1,374,392 female deaths reported in the US in 2017, kidney disease was listed as the cause of death for 24,889 women and was reported as the 9th overall cause of death for women in 2017. [45] Out of the 1,439,111 male deaths reported in the US in 2017, kidney disease was not listed in the top 10 causes of death. [45]
>20:1 >110:1 Prerenal (before the kidney) BUN reabsorption is increased. BUN is disproportionately elevated relative to creatinine in serum. This may be indicative of hypoperfusion of the kidneys due to heart failure or dehydration. [4] Gastrointestinal bleeding or increased dietary protein can also increase the ratio. [4] 12–20:1 40–110:1
As of 2020 a rapidly progressive chronic kidney disease, unexplained by diabetes and hypertension, had increased dramatically in prevalence over a few decades in several regions in Central America and Mexico, a CKDu referred to as the Mesoamerican nephropathy (MeN). It was estimated in 2013 that at least 20,000 men had died prematurely, some in ...
There are also differences in epidemiology between the sexes, the disease is more common in men than in women by a ratio of 2 to 1. [ 62 ] The epidemiological data also reveals information regarding the most common way that symptoms develop in people with nephrotic syndrome: [ 62 ] spontaneous remission occurs in up to 20% or 30% of cases ...