Blood lancets are generally disposable.
Lancets are also used to prick the skin in skin testing for allergies.
A blood-sampling device, also known as a lancing device, is a reusable instrument equipped with a lancet. It is also most commonly used by diabetics during blood glucose monitoring.
The depth of skin penetration can be adjusted for various skin thicknesses. Long lancing devices are used for fetal scalp blood testing to get a measure of the acid base status of the fetus.
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