No tourniquet is required for arterial puncture, as arteries are naturally distended and more easily located since they carry a pulse. The area is usually cleansed with both povidone-iodine and alcohol after the patient has been sufficiently restrained. Once the blood has been obtained, manual pressure is applied to the site for at least five minutes to control any further bleeding. For children who have the ability to urinate on command, urine testing is usually a straightforward procedure. For infants and toddlers who are not yet toilet trained, however, the techniques described below can be used.
Bagged urine specimens .
It requires a sterile plastic bag with an adhesive rim designed to stick to skin. The area around the genitals is cleansed thoroughly with iodine and allowed to dry before the bag is applied. When the patient voids, the bag is simply removed and the urine placed in the appropriate containers for analysis. Bladder catheterization . When a sterile specimen is needed to check for infection or when rapid results are essential to treatment, bladder catheterization is a safe, quick method of obtaining a sterile urine specimen.