a display 1208 that the practitioner uses to view the patient 1201 and the action of the medical device 1205 typically this is performed by a camera mounted to the medical device 1205 or to the arm 1200 our invention adds a vein scanner device 1202 to either the medical device 1205 or the arm 1200 the vein scanner is arranged in such a way that the scanned area overlaps in a know orientation with the medical device in a preferred embodiment the medical device is a syringe and the enhanced vein pattern is used to properly position the syringe for venipuncture the invention enables this by either projecting the pattern on the patient 39 s body such that it is viewed by the camera and seen by the practitioner on the remote display 1208 or alternatively a second display is mounted along with the camera display 1208 so that a digital version of the vein pattern can be seen or alternatively a single display is used with the digital version of the vein pattern overlaid over the camera view of the patient pulse oximetry is a non invasive method of measuring arterial oxygen saturation the use of an infrared light source and a red light source along with a photo detector in a finger clip arrangement to measure pulse and oxygen levels in blood are well known in the art the basis for the measurement is the differential absorption between oxygenated hemoglobin and non oxygenated hemoglobin of the two different wavelengths of light the traditional technique for performing this measurement requires contact with the.