Patent ID: 9636491
Date: 2017-05-02
CPC Classifications: A61M

Claim:
1. A needle cartridge for use with a transdermal microneedling apparatus, the needle cartridge comprising: a base portion having a proximal end proximate to the apparatus, and having a distal end opposite its proximal end; a sleeve having a proximal end coupled to the distal end of the base portion, and having a distal end opposite its proximal end; a needle unit disposed at the distal end of the base portion and within the sleeve, the needle unit comprising at least one needle extending therefrom towards the distal end of the sleeve; a drive shaft disposed through the base portion and coupled to the needle unit, the drive shaft configured to be driven reciprocally along a longitudinal axis of the base portion by a drive system of the apparatus, and thereby move the needle unit reciprocally along the longitudinal axis of the base portion such that the at least one needle of the needle unit extends beyond and retracts within the distal end of the sleeve; and an absorbing barrier disposed within the base portion and configured to prevent the backflow of liquid from the needle unit through the base portion during use of the apparatus, wherein the absorbing barrier comprises at least one absorbing member having an outer dimension in contact with an interior surface of the base portion.