Urine collection instructions for 24 hour examination
For the 24-hour urine collection it is necessary to strictly follow this procedure:
- On the morning of the day of collection start, discard all the urine from the first morning urination, completely emptying the bladder into the toilet. Note the time (eg 7 o'clock).
- Collect in a suitable container all the urine emitted from this moment onwards in the following 24 hours, including those of the night and those of the first urination on the second day; the collection must therefore be finished at the same time as the beginning of the collection (7 am of the following day), completely emptying the bladder into the container.
PLEASE NOTE: During the 24 hours of collection, store the container in a cool place (temperature below 10 ° C) or in the refrigerator, away from sunlight.
It is important NOT to lose any part of your urine.
If the urine collection within 24 hours is carried out for the dosage of some particular metabolites, a preparatory diet is necessary; consult your doctor:
Hydroxyprolinuria: starting from 48-72 hours prior to the start, and for the entire time of urine collection, avoid the following foods: meat, meat derivatives, broth and meat extracts, products containing gelatin, fish, sweets, ice cream . Milk and derivatives, eggs and vegetable broth, fruit and vegetables are allowed. During this period it is advisable, after consulting a doctor, to avoid taking drugs; otherwise, it is advisable to communicate the name of the drugs taken at the time of the examination.
5-hydroxyindolacetic acid: starting from 48-72 hours prior to the beginning, and for the entire time of urine collection, it is necessary to observe a diet devoid of the following foods: pineapple, avocado, bananas, kiwis, blackberries, red plums, aubergines, tomatoes, dried fruit, coffee, tea, chocolate During this period it is advisable, after consulting a doctor, to avoid taking drugs that contain: acetylsalicylic acid, chlorpromazine, phenacetin, phenothiazine, reserpine; otherwise it is advisable to communicate the name of the drugs taken at the time of the examination.
Vanilmandelic acid: starting from 48-72 hours before the start, and for the entire time of urine collection, it is necessary to observe a diet free of the following foods: avocado, bananas, kiwi, dried fruit, coffee, tea, chocolate. During this period it is advisable, after consulting a doctor, to avoid taking drugs; otherwise, it is advisable to communicate the name of the drugs taken at the time of the examination.
Oxalic acid: starting from 48-72 hours prior to the start, and for the entire time of urine collection, it is necessary to avoid the intake of Vitamin C (ascorbic acid).
Some containers for the collection of urine need to be acidified before use, consult your doctor and carefully follow the directions using the utmost caution. For example, if the container already contains concentrated acid (generally hydrochloric):
do not urinate directly into the container but into a clean container and pour the urine keeping the face away from the container containing the acid (irritating fumes may develop)
keep the container out of the reach of children
keep the container tightly closed and do not turn it upside down
in case of accidental contact of the skin with acid, wash immediately with plenty of water and consult a doctor
Other articles on "24 Hour Urine Collection"
- Urine Collection - Practical Rules
- Collection of urine for urine culture
