What is a key step in the nonaspirate (capillary) technique for obtaining a biopsy?

In the nonaspirate (capillary) technique for obtaining a biopsy, moving the needle rapidly back and forth through the mass is a key step. This technique is designed to create a capillary action that draws cells into the needle without the need for suction, which can be more delicate and suitable for certain masses, particularly in locations where more forceful aspiration could damage surrounding tissues.

This vigorous movement ensures that a sufficient sample of the cellular material is obtained from the target area. It allows for the collection of cells that can give valuable diagnostic information without risking injury to the surrounding structures. Proper technique is essential for maximizing sample quality while minimizing trauma to the site.

Other methods, such as inserting a larger gauge needle, may not be suitable for nonaspirate techniques, as they could complicate the procedure or damage the tissue. Cleaning the site with sterile water is also not a standard practice, as using antiseptic solutions is preferred to reduce the risk of infection. Additionally, holding the mass firmly while applying pressure might be relevant in different biopsy techniques but is not the primary focus in the technique described.