For adult patients, what is the maximum length lancet that should be used for a fingerstick?

The maximum length lancet that should be used for a fingerstick in adult patients is 2.2 mm. Using a lancet of this length is considered sufficient to penetrate the skin and obtain a blood sample while minimizing discomfort and avoiding damage to deeper tissues, such as nerves and blood vessels, which are more prevalent in the deeper layers of the skin.

Lancets that are longer than 2.2 mm may risk causing unnecessary pain or complications, while those that are too short may not effectively penetrate the skin, leading to inadequate blood flow and requiring multiple attempts. Therefore, the choice of a 2.2 mm lancet strikes an appropriate balance between effectiveness and safety for fingerstick procedures.