Low noise patient cable

• US 20030212312A1
• Filed: 12/19/2002
• Published: 11/13/2003
• Est. Priority Date: 01/07/2002
• Status: Abandoned Application

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Quinones, Jose, Coffin, James P. IV, Atapattu, Deshan L., Abdul-Hafiz, Yassir, Schmidt, John
• Application Number:
  US10/325,602
• Publication Number:
  US 20030212312A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 2562/222 Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: H01B 11/1066 the coating containing conductive or semiconductive material

Abstract

A low noise patient cable has a plurality of emitter wires configured to communicate a drive signal between a monitor and at least one emitter. A plurality of detector wires is also configured to communicate a physiological signal between a detector responsive to the emitter and the monitor. A polymer layer is disposed around, and adapted to conduct a triboelectric charge away from, the detector wires.

Claims

1. A low noise patient cable comprising:

a plurality of emitter wires configured to communicate a drive signal between a monitor and at least one emitter;

a plurality of detector wires configured to communicate a physiological signal between a detector, which is responsive to energy received from said at least one emitter, and said monitor; and

a polymer layer disposed around at least a pair of said detector wires, said polymer layer adapted to conduct a triboelectric charge away from said detector wires.

2. The low noise patient cable according to claim 1 wherein said pair of detector wires is configured as a twisted pair and said polymer layer is coextruded with said twisted pair.

3. The low noise patient cable according to claim 2 wherein said polymer layer is a conductive PVC.

4. The low noise patient cable according to claim 3 wherein said conductive PVC is coextruded to a diameter in the range of about 0.055 to about 0.061 inches.

5. The low noise patient cable according to claim 4 wherein said conductive PVC is a flexible conductive vinyl compound.

6. A cabling method comprising the steps of:

twisting a pair of detector wires;

coextruding said wires with a conductive polymer to form a polymer layer disposed around said insulator of each of said wires;

extending a pair of emitter wires proximate said detector wires; and

disposing an outer jacket around said detector wires and said emitter wires so as to form a patient cable.

7. The cabling method according to claim 6 further comprising the steps of:

disposing an inner shield around said polymer layer; and

disposing an inner jacket around said inner shield,

said inner shield and said inner jacket configured so as to be between said detector wires and said emitter wires.

8. The cabling method according to claim 7 further comprising the step of disposing an outer shield around said inner jacket and said emitter wires, said outer shield configured so as to be encased by said jacket.

9. A patient cable comprising:

a detector wire means for conducting a physiological signal between a sensor and a monitor;

a polymer means for conducting triboelectric charge coextruded with said detector wire means; and

an emitter wire means for conducting a drive signal between said monitor and said sensor jacketed with said detector wire means.

10. The patient cable according to claim 9 further comprising:

a first conductive means for shielding said detector wire means jacketed with said detector wire means; and

a second conductive means for shielding said emitter wire means jacketed with said emitter wire means, said detector wire means and said first conductive means.