Abstract: Disclosed herein are unique needle cartridges for use with transdermal microneedling devices, and prevent backflow of liquid(s) from the skin of a patient. One embodiment may comprise a base portion and a sleeve coupled to the base portion. The needle cartridge may also comprise a needle unit disposed at the distal end of the base portion and within the sleeve, wherein the needle unit comprises at least one needle ending therefrom. Also, the needle cartridge comprises a drive shaft disposed through the base portion and coupled to the needle unit, and configured to be driven reciprocally along a longitudinal axis of the base portion and thereby move the needle unit reciprocally such that the needles of the needle unit extend beyond and retract within the sleeve. Such needle cartridges would include an absorbing barrier disposed within the base portion to prevent the backflow of liquid(s) from the needle unit by absorbing such liquid(s).

Abstract: Disclosed herein are unique needle cartridges for use with transdermal microneedling devices that generate and emit low energy RF signals to, and prevent backflow of liquid(s) from, the skin of a patient. One embodiment may comprise a base portion and a sleeve coupled to the base portion. Such an embodiment may also comprise an RF needle capsule disposed within the housing, and having a needle unit comprising at least one needle on an end thereof. Also, the needle cartridge comprises a drive shaft disposed through the base portion and coupled to the needle unit, and configured to be driven reciprocally along a longitudinal axis of the base portion and thereby move the RF needle capsule reciprocally such that the needles of the needle unit extend beyond and retract within the housing. Such RF needle cartridges further include an absorbing barrier disposed within the housing to prevent the backflow of liquid(s) from the needle unit by absorbing such liquid(s).