Body-worn biometric sensor

A body-worn sensor comprising:

• a first piece that houses a power source, memory, a processor, a pulse oximeter, a temperature sensor, an accelerometer, ECG detection circuitry, a wireless communication device, and a first ECG lead;
• and
• a second piece mechanically and releasably attachable to the first piece and including a flexible body with a second ECG lead embedded therein for communication with the ECG detection circuitry housed within the first piece,
• wherein the second piece includes a biocompatible adhesive layer along an underside of the flexible body to contact a skin surface such that the second piece is disposable and non-reusable after adhesion to a user's body,
• wherein the first piece comprises an exterior housing configured to nest within a corresponding aperture defined by the second piece, the exterior housing of the first piece having an attachment mechanism to mechanically and releasably secure to the second piece, wherein the first piece is reusable with a series of second pieces having a form factor the same as said second piece,
• wherein the attachment mechanism comprises a mating threaded engagement with a predefined lock location so that, when the first piece is mechanically secured to the second piece, a first electrical connector exposed along an exterior of the first piece aligns with a second electrical connector exposed along the corresponding aperture defined by the second piece to provide a hardwired electrical connection between the second ECG lead embedded within the flexible body of the second piece and the ECG detection circuitry within the housing of the first piece, and
• wherein the first ECG lead of the first piece extends to a first lead end at an exterior lower surface of the housing of the first piece so that the first ECG lead contacts the skin surface when the flexible body of the second piece is adhered to the skin surface, and wherein the second ECG lead extends through the flexible body of the second piece to a second lead end at an exterior lower surface of the flexible body of the second piece such that the second lead end of the second ECG lead and the first lead end of the first ECG lead are spaced apart from one another by a separation distance of 2.5-5 inches.