When performing a bleeding time on an adult, the incision is made:

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The incision for a bleeding time test on an adult is made horizontally to the antecubital crease, usually about 1-2 cm below it. This is because the skin in this area is thinner and more easily punctured, leading to a more accurate result. Making a vertical or perpendicular incision can result in a deeper cut or damage to the vein, leading to an inaccurate bleed time result. Choosing option B, parallel to the cephalic vein, is not a recommended incision for a bleeding time test.

When Performing a Bleeding Time on an Adult, the Incision