Working wire for a biological sensor
A working wire for a biological sensor is disclosed. The working wire includes a substrate comprising cobalt-chromium (Co—Cr) alloy or Nitinol alloy, a platinum layer comprising platinum on the substrate, and a membrane layer comprising a biological membrane applied over the platinum layer.
1. A working wire for a continuous glucose monitoring sensor, comprising:
a substrate of the working wire for the continuous glucose monitoring sensor consisting of cobalt-chromium (Co—Cr) alloy, wherein the substrate is produced having an original shape of a straight, linear position, and heat treated or annealed thereby exhibiting a shape memory effect;
a platinum layer comprising platinum on the substrate; and
a membrane layer comprising a biological membrane applied over the platinum layer;
wherein a thickness of the working wire is in a range from 0.0025 inches to 0.005 inches.
2. The working wire of claim 1 , wherein the substrate further comprises a core, the core comprising titanium, titanium alloy, Ti-6Al-4V, or vanadium alloy.
3. The working wire of claim 1 , wherein the substrate is an elongated wire having a circular cross-section.
4. The working wire of claim 1 , wherein:
a thickness of the platinum layer is in a range from 20 microns to 100 microns.
5. The working wire of claim 1 , wherein the platinum of the platinum layer is applied on the substrate by a Drawn Filled Tube (DFT) process.
6. The working wire of claim 1 , wherein the platinum of the platinum layer is deposited using chemical deposition or electroplating.
7. The working wire of claim 1 , wherein the membrane layer is polyurethane based.
8. The working wire of claim 1 , wherein the membrane layer being for continuous glucose monitoring.
9. The working wire of claim 1 , wherein a distal end of the working wire is shaped to a pointed formation.
10. The working wire of claim 1 , wherein the working wire naturally transitions from a wound position to the original shape of the straight, linear position.
11. The working wire of claim 1 , wherein the substrate returns to the original shape of a straight, linear position when a deforming load is released.