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Ketone bodies that commonly appear in the urine when fats are burned for energy are acetoacetate and beta-hydroxybutyric acid. Acetone is also produced and is expired by the lungs. [1] Normally, the urine should not contain a noticeable concentration of ketones to give a positive reading.
Positive result on a Ketostix test strip, which is specialized for measuring ketones. Ketone bodies are products of fat breakdown. When the body relies on fats, rather than carbohydrates, as its main energy source, increased levels of ketones occur in the blood and urine. The presence of detectable levels of ketones in the urine is called ...
Download as PDF; Printable version; In other projects ... Reference ranges for urine tests are described below: ... Ketones: n/a: 0 / negative [2] Bilirubin: n/a:
Automatic analysis of urine test strips using automated urine test strip analysers is a well-established practice in modern-day urinalysis. They can measure calcium , blood, glucose, bilirubin, urobilinogen, ketones, leukocytes, creatinine , microalbumin , pH, ascorbic acid and protein.
The concentration of ketone bodies in blood is maintained around 1 mg/dL. Their excretion in urine is very low and undetectable by routine urine tests (Rothera's test). [18] When the rate of synthesis of ketone bodies exceeds the rate of utilization, their concentration in blood increases; this is known as ketonemia.
Acetyl CoA is metabolised into ketone bodies under severe states of energy deficiency, like starvation, through a process called ketogenesis, whose final products are aceto-acetate and β-Hydroxybutyrate. These ketone bodies can serve as an energy source in the absence of insulin-mediated glucose delivery, and is a protective mechanism in case ...
Generally, Benedict's test detects the presence of aldehyde groups, alpha-hydroxy-ketones, and hemiacetals, including those that occur in certain ketoses. In example, although the ketose fructose is not strictly a reducing sugar, it is an alpha-hydroxy-ketone which results to a positive test because the base component of Benedict converts it ...
The ketone which is present is mostly beta-hydroxybutyrate rather than acetoacetate resulting in only a weakly positive nitroprusside test. [2] People usually do not present with high blood sugar or sugar in the urine. [2] This can cause false negative results when testing urine ketones as they only measure acetoacetate.