Final answer:
In a dermal puncture procedure for bilirubin testing on a newborn, a tourniquet is not used, whereas a lancet, capillary tube, and possibly a centrifuge are part of the standard equipment.
Step-by-step explanation:
Equipment for a dermal puncture to collect a sample for bilirubin testing on a newborn includes several specific items, but among the options provided, a tourniquet is not typically used. A lancet is employed to make a small puncture in the skin, while a capillary tube uses capillary action to draw the blood up for analysis. Afterwards, the sample may be processed using a centrifuge to separate the components of the blood if necessary. A syringe is generally used for venous blood draws and is not appropriate for capillary blood collection, making it another incorrect option. It's important to note that for bilirubin testing, especially in newborns, minimizing the blood volume and stress during collection is essential. Therefore, the correct answer to the question is a tourniquet, which is typically not required for such a procedure.