What is the best time to take urine sample?

It is preferred that you collect a specimen first thing in the morning, because the first morning urination is more concentrated and likely to yield the best results. Prior to urinating, it's important to wipe your genital area clean so that the specimen is not contaminated with bacteria from your skin.

Is first morning urine The best sample?

The first urine of the day is best because the level of bacteria and chemicals in your urine will be higher. Wash your hands before collecting the urine. If the container has a lid, remove the lid and set it down with the inner surface up.

What time of day is best to take a urine sample?

You can collect a urine sample at any time of day, unless your GP or practice nurse advises you otherwise. The types of urine sample you might be asked for include a random specimen, first morning specimen or timed collection.

How long should I hold my pee before a urine test?

If possible, collect the sample when urine has been in your bladder for 2 to 3 hours. You will use a special kit to collect the urine. It will most likely have a cup with a lid and wipes. Wash your hands with soap and warm water.

Why is first morning urine specimen preferable?

The first urine voided in the morning is preferred because it has a more uniform volume and concentration and a lower pH, which helps preserve the formed elements. If it is not possible to obtain a first morning sample, the time of the sample should be noted on the test request form and in the patient's records.

Answering Top Urine Sample Questions

Is morning urine good for urinalysis?

Urine for urinalysis may be collected at any time, at the lab or in your home. You do not need to schedule an appointment at the lab. It is preferred that you collect a specimen first thing in the morning, because the first morning urination is more concentrated and likely to yield the best results.

What time is considered first morning urine?

The first morning urine is the urine you void when you get up for the day. If you get up during the night, it is not necessary to catch that urine. You can wait until you get up for the day. For women who work night shift, your first morning urine will be the urine you void after you slept during the day.

Should I shower before a urine test?

Before urination, the external genitalia should be washed with warm running water. No cleaning products (soap etc) should be used. If women have vaginal discharge or menstrual blood, it is necessary to use a menstruation tampon.

Can I drink coffee before a urine test?

If your doctor has ordered a test for metanephrine in your urine, you should avoid caffeine for 24 hours and during collection of your specimen.

What foods should you avoid before a urine test?

- Avoid alcohol, coffee, tea, tobacco and strenuous exercise for 24 hours prior to collection and up to collection time. - Do not consume avocados, bananas, eggplant, pineapples, plums, tomatoes or walnuts for 48 hours before the test.

Do I have to use the first urine of the day while taking a test?

You can do a pregnancy test on a sample of urine collected at any time of the day. It doesn't have to be in the morning.

When is the best time to test the urine for most chemical properties?

For majority of urine examinations the first early morning urine is the most suitable. It is recommended the urine collection is preceded by at least eight hours of lying position. The early morning urine is more concentrated and acidic compared to the later samples, and suitable especially for chemical examination.

How can I get the most accurate urine sample?

To get an accurate result and avoid bacterial contamination, “clean” midstream urine is used. You take a sample of midstream urine by interrupting the flow of urine after a few seconds and then collecting this middle portion of the urine in a cup.

How long is morning pee good for testing?

First morning urine samples will normally contain the highest levels of hCG. C. If not tested immediately, urine may be stored at room temperature (59-86^oF or 15-30^o C) or 8 hours refrigerated at 36─46^oF (2─8^oC) for up to 3 days.

Is second morning urine accurate?

The second morning urine (SMU) method developed by Kawasaki is reliable and convenient for estimating the daily salt intake. On the other hand, Tanaka have developed more convenient method named as casual urine (CU) method in which a urine sample can be collected during the daytime.

Does caffeine affect urine sample?

Conclusion. Our results suggest that reported consumption of caffeinated coffee is positively associated with 24-h urinary excretion of caffeine, paraxanthine, and theophylline, and may be used as a marker of caffeine intake for epidemiological studies.

What can be detected in a urine test?

A urinalysis is a simple test that looks at a small sample of your urine. It can help find problems that need treatment, including infections or kidney problems. It can also help find serious diseases in the early stages, like kidney disease, diabetes, or liver disease.

What can cause a false positive on a urine drug screen?

Clinically, a false positive urine drug screen can be due to numerous xenobiotics: dextromethorphan, diphenhydramine, doxylamine, ibuprofen, imipramine, ketamine, meperidine, venlafaxine, buproprion, methylenedioxpyrolvalerone (MDPV), and tramadol.

What is a dirty catch urine sample?

A contaminated urine specimen can give a large amount of false data on a dipstick test. Greater than five epithelial cells on microscopic evaluation is likely a sign of contamination.

How do you get a clean catch midstream urine specimen?

Void the first portion of the urine into the toilet. While continuing to void, place the collection cup into the midstream to collect the urine specimen. Do not touch the inside or tip of the cup with the hands or any other part of the body. Void remainder of the urine into the toilet.

Is urine usually darker first thing in the morning?

Because people tend to sleep for several hours without having a drink, their urine is normally darker when urinating first thing in the morning. Darker urine during the day or evening may be one of the signs that someone is dehydrated meaning they are not drinking enough fluids.

What color should morning urine be?

Morning is when your urine will be most concentrated. So, if your morning urine is a pale, straw color, you're probably well hydrated and healthy. At bedtime, it should look as clear as water or at least pale yellow. If it doesn't, you may need to boost your fluid intake.

What should not be found in urine?

Do I need to do anything before a urine test?

The general strategy for passing urine tests is to increase your fluid intake and urine flow so as to dilute the concentration of drugs in the sample below the threshold of detection. An hour or two before the test, you should fill your bladder with fluids – as much as you can drink.