Patent ID: 7850651
Filing Date: 2010-12-14
Classification: A61B,A61M

Abstract:
1. An aspiration assembly comprising: an outer cannulated needle having a first tip at a first end and a first coupling device at a second end that is opposite to the first end; a threaded collar having a second coupling device in cooperation with the first coupling device to removably couple the threaded collar to the outer cannulated needle; and an inner aspiration needle having a second tip at a third end, a third coupling device at a fourth end opposite to the third end, and a threaded portion proximate to the fourth end; wherein the inner aspiration needle is inserted within the outer cannulated needle such that the second tip of the inner aspiration needle extends beyond the first tip of the outer cannulated needle and the threaded portion of the inner aspiration needle threadably engages the threaded collar; wherein the distance that the second tip of the inner aspiration needle extends from the first tip of the outer cannulated needle increases when the inner aspiration needle is rotated in a first direction relative to the outer cannulated needle; and wherein the distance that the second tip of the inner aspiration needle extends from the first tip of the outer cannulated needle decreases when the inner aspiration needle is rotated in a second direction relative to the outer cannulated needle, the second direction is opposite to the first direction.