a disposable biopsy needle , particularly for bone marrow biopsy sampling utilizing a metal cannula and stylet structure , and which otherwise may be formed from inexpensive material such as a suitable plastic . suitable high production techniques , such as injection molding , may then be employed in the production of the remainder of the components of the structure , whereby the final product not only is of excellent design construction for the intended purpose , but also is of exceptionally low cost in manufacture , readily permitting its disposal following a single use .