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Urinalysis: Difference between revisions

Urinalysis (view source)

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The test is semiquantitative. This means that it cannot exactly tell the amount of the above compounds are present in the sample, but the degree of colour changes corresponds roughly to the amount.  
The test is semiquantitative. This means that it cannot exactly tell the amount of the above compounds are present in the sample, but the degree of colour changes corresponds roughly to the amount.  
<section begin="clinical biochemistry" />
== Urinary sample collection ==
Proper sample collection is essential to maintain as high sensitivity and specificity as possible. A sterile container for urine collection is obligatory to prevent contamination. The patient should not provide a sample if they've peed in the previous 4 hours, as in these cases the urine is "too fresh" to show signs of bacterial infection. Morning urine is usually best. The male should withdraw the foreskin and the female should spread the labia when making the sample, to prevent contamination. The initial urine should be discarded; mid-stream urine should be used.


<section end="clinical biochemistry" />
== Procedure ==
== Procedure ==
Proper sample collection is essential to maintain as high sensitivity and specificity as possible. The patient should not provide a sample if they've peed in the previous 4 hours, as in these cases the urine is "too fresh" to show signs of bacterial infection. The male should withdraw the foreskin and the female should spread the labia when making the sample. Morning urine is usually best. The initial urine should be discarded; mid-stream urine should be used.
[[File:Urinary dipstick.png|thumb|This shows the urinary dipstick and the standard with which the result is compared to.<ref>https://www.onecaremedical.com.sg/urine-dipstick-tests/</ref>]]
[[File:Urinary dipstick.png|thumb|This shows the urinary dipstick and the standard with which the result is compared to.<ref>https://www.onecaremedical.com.sg/urine-dipstick-tests/</ref>]]
The patient provides a urinary sample. A single-use paper strip is dipped into the urine. The strip contains multiple squares covered with different reagents, each of which change colour when coming into contact with certain compounds in the urine. The degree of colour change is compared to a standard which is usually printed on the bottle.
The patient provides a urinary sample. A single-use paper strip is dipped into the urine. The strip contains multiple squares covered with different reagents, each of which change colour when coming into contact with certain compounds in the urine. The degree of colour change is compared to a standard which is usually printed on the bottle.