Patent ID: 9078638
Filing Date: 2015-07-14
Classification: A61B

Abstract:
1. A bone marrow aspirating device comprising: a housing; a reversible fluid pump mounted on the housing, the pump having an first port and a second port; a fluid reservoir connected to the first port of the pump; a moveable needle having a passageway therethrough mounted in the housing and connected to the second port of the pump, the needle having a drive system for moving the needle into and out of the housing; an axially extending rotary input shaft connected to the pump and selectively engagable with the drive system for the moveable needle to move the needle with respect to the housing, the input shaft having a first axial position in which it drives the pump in a first direction to move fluid from the reservoir through the passageway of the needle but is disengaged from the needle drive system, a second axial position in which it drives the pump in a second direction to move fluid from the needle passageway to the second port but is disengaged from the needle drive system so that the needle does not move and a third position in which it drives the pump in the second direction to move fluid from the needle passageway to the second port and engages the needle to cause the needle to move with respect to the housing; and a selector switch having at least one of a first position and a second position preventing engagement of the input shaft and needle drive system and a third position allowing engagement of the input shaft and needle drive system for moving the needle with respect to the housing.