A New Single-Use Bone Marrow Biopsy Needle with Core Retention Design
Journal Title: Biomedical Journal of Scientific & Technical Research (BJSTR) - Year 2019, Vol 19, Issue 3
Abstract
A needle for obtaining a solid core (trephine) bone marrow biopsy sample from the posterior ilium is described. The needle is comprised of a hollow stainless-steel tube whose front-end diameter is reduced in comparison with the proximal segment. At its terminus the needle is also beveled and has six circumferentially spaced facets thereby forming a sharp cutting edge. The segment of the tube between the longer wider portion of the hollow tube and its smaller reduced diameter front end portion has a series of diamond shaped serrations/flutes on its surface which offer enhanced cutting ability as with a saw to assist in easy penetration of the needle through the dense cortical bone and into the marrow cavity.Bone marrow (BM) biopsy plays an important role in the investigation, diagnosis and management of various haematological as well as non-haematological malignant conditions [1-4]. Since the development of an improved BM biopsy needle [5,6] and its introduction in a disposable form, there has been a considerable growth in its use. The value of BM biopsy, particularly in different haematological conditions is now well established [7,8]. However, loss of core samples during their extraction, i.e., failure to retain the complete biopsy sample within the lumen of the needle as the needle is withdrawn from the patients has been a serious continuing problem. The importance and significance of this particular problem was recognized and was successfully addressed by the development of an improved bone marrow biopsy needle with a core retention device [9]. But until the present time this needle was not available in a disposable form because of technical manufacturing limitations and the cost involved. In recent years technology has emerged which obviate these problems and as a result such a needle can be made economically and in large numbers. Taking advantage of this new technology, a new singleuse bone marrow biopsy needle that retains the original principle of core retention device has now been produced. In addition, a new feature has been added to the design. It consists of a series of surface serrations (flutes) at the tapering transitional portion which ease the boring through the dense cortical bone and entry into the spongy hematopoietic bone. Furthermore, an easy technique of removing the biopsy sample from within the lumen of the needle has also been introduced. In this technique, an insertion aid is used to remove the biopsy specimen. This insertion aid has been designed to receive the distal cutting end of the needle on one side and the front end of the pusher rod on the other side. In this way, the operator can utilize the insertion aid to expel the biopsy sample easily through the proximal end of the needle.
Authors and Affiliations
Anwarul Islam
Keywords
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- EP ID EP621729
- DOI 10.26717/BJSTR.2019.19.003294
- Views 151
- Downloads 0
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