Needle Device and Needle System Having the Same

摘要

A needle device includes a shell, a needle unit and an actuator. The needle unit includes an outer needle guide and a needle member. The outer needle guide has a piercing end for penetrating into a biological body part. The needle member is disposed in the shell and the outer needle guide, has a needle tip protruding from a front end of the shell and is movable relative to the shell and the outer needle guide. The actuator is responsive to a control signal to drive the needle member and move the needle tip between a protruding position, where the needle tip protrudes out of the piercing end of the outer needle guide, and a retracting position, where the needle tip is retracted back into the outer needle guide.

主权项

1. A needle system capable of identifying tissue type of a tissue layer, the needle system comprising:
a needle device for penetrating into a biological body part, the needle device including
a needle member that extends and is movable along a needle axis and that has a needle tip, andan electrically operable actuator that is responsive to a control signal to drive the needle member to move along the needle axis against a resistance force from a tissue layer being penetrated by the needle device; and a control module including
a displacement detecting unit that is operable to detect displacement of the needle member along the needle axis, anda control unit that is electrically coupled to the actuator and the displacement detecting unit, that is operable to output the control signal to the actuator, and that is operable to identify the tissue type of the tissue layer based on the control signal and the displacement of the needle member detected by the displacement detecting unit.