Patent ID: 11918795
Assignee: BARD ACCESS SYSTEMS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A puncturing device configured to differentiate between a venipuncture and an arterial puncture, comprising:
a needle including a shaft, a lumen defined by an inner diameter of the shaft, and a tip in a distal-end portion of the shaft;
a hub disposed over a proximal-end portion of the shaft, the hub including a blood-flashback chamber in fluid communication with the lumen of the needle configured to capture an aliquot of blood in the blood-flashback chamber at a time of accessing a vein or an artery of a patient by way of a puncture with the needle; and
an oxygen sensor integrated with the hub configured to colorimetrically indicate a concentration of oxygen in captured blood in the blood-flashback chamber for subsequently determining whether the concentration of oxygen in the captured blood is consistent with venous blood or arterial blood to differentiate between a venipuncture and an arterial puncture, respectively, the oxygen sensor including a chemical formulation having an alkaline buffer and indigo carmine as a color agent disposed in the blood-flashback chamber.