Patent ID: 8821450
Filing Date: 2014-09-02
Classification: A61M,G01D

Abstract:
1. A syringe encoder comprising: a length of material adapted to propagate electromagnetic energy emitted from an electromagnetic energy source incident on a syringe in a direction substantially parallel to a longitudinal axis of the syringe; and at least two indicators positioned along the length of material, wherein each of the at least two indicators is located at a different longitudinal position along the length of material, wherein each of the at least two indicators have a reflective surface adapted to reflect the electromagnetic energy, wherein the reflective surface of the at least first indicator is a different depth than the reflective surface of the at least second indicator, wherein each of the at least two indicators is adapted to interact with at least a portion of the electromagnetic energy and reflect the electromagnetic energy radially from the length of material such that reflected energy is detectable by a sensor thereby providing information about one or more parameters.