US 5,411,023 AGranted

Optical sensor system

AssigneeShielding, Inc.

InventorsG. Ronald Morris, Sr., G. Ronald Morris, Jr., Charles E. McMillen

Life of this patent

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Abstract

An optical sensor system (such as an oximeter system) for use on a patient in an electrical environment (such as an RF field) includes at least one of the following three subsystems: (A) A light input subsystem includes a first control and display module disposed remotely outside of an electrical field, and input electrical cable connected at one end to the first module and at the other end to an electrically-powered light source disposed closely adjacent but outside of the electrical field. Input fiber optic cable for the transmission of analog optical signals extends from the light source to adjacent a patient in the electrical field. (B) A light output subsystem includes output fiber optic cable for the transmission of analog optical signals extending from adjacent the patient in the electrical field to a light detector disposed closely adjacent but outside of the electrical field. Output electrical cable is connected at one end to the light detector and at the other end to a second control and display module disposed remotely outside the electrical field, (C) A combination of the light input and output subsystems.

Claims7

Dependent claims

An optical sensor system for use on a patient in an electrical field, said system including one of the following subsystems:

(A) a light input subsystem comprising:
(i) a first control module;
(ii) an electrically powered light source;
(iii) an input electrical cable connecting said first control module to said light source;
(iv) an input fiber optic cable having a first end connected to said light source for the transmission of analog optical signals and having a second end adapted to be disposed at a point adjacent the patient;
said input fiber optic cable having a sufficient length such that, when said input fiber optic cable second end is disposed at the point adjacent the patient, said light source is disposed closely adjacent, but outside of the electrical field;
said input electrical cable having a sufficient length such that, when said light source is disposed closely adjacent, but outside of the electrical field, said first control module is disposed remotely outside of the electrical field;
and
said length of said input electrical cable being longer than said length of said input fiber optic cable;
(B) a light output subsystem comprising:
(i) a second control module;
(ii) a light detector;
(iii) an output electrical cable connecting said second control module to said light detector;
(iv) an output fiber optic cable having a first end adapted to be disposed at a point adjacent the patient and a second end connected to said light detector for the transmission of analog optical signals;
said output fiber optic cable having a sufficient length such that, when said output fiber optic cable first end is disposed at the point adjacent the patient, said light detector is disposed closely adjacent, but outside of the electrical field;
said output electrical cable having a sufficient length such that, when said light detector is disposed closely adjacent, but outside of the electrical field, said second control module is disposed remotely outside of the electrical field;
and
said length of said output electrical cable being longer than said length of said output fiber optic cable;
(C) a combination of said light input and output subsystems.

16 more elements

An oximeter system for use on a patient in an MRI environment including an RF field, said system including one of the following subsystems:

(A) a light input subsystem comprising:
(i) a first control module;
(ii) an electrically powered light source;
(iii) an input electrical cable connecting said first control module to said light source;
(iv) an input fiber optic cable having a first end connected to said light source for the transmission of analog optical signals and having a second end adapted to be disposed at a point adjacent the patient;
said input fiber optic cable having a sufficient length such that, when said input fiber optic cable second end is disposed at the point adjacent the patient, said light source is disposed closely adjacent, but outside of the RF field;
said input electrical cable having a sufficient length such that, when said light source is disposed closely adjacent, but outside of the RF field, said first control module is disposed remotely outside of the RF field;
and
said length of said input electrical cable being longer than said length of said input fiber optic cable;
(B) a light output subsystem comprising:
(i) a second control module;
(ii) a light detector;
(iii) an output electrical cable connecting said second control module to said light detector;
(iv) an output fiber optic cable having a first end adapted to be disposed at a point adjacent the patient and a second end connected to said light detector for the transmission of analog optical signals;
said output fiber optic cable having a sufficient length such that, when said output fiber optic cable first end is disposed at the point adjacent the patient, said light detector is disposed closely adjacent, but outside of the RF field;
said output electrical cable having a sufficient length such that, when said light detector is disposed closely adjacent, but outside of the RF field, said second control module is disposed remotely outside of the RF field;
and
said length of said output electrical cable being longer than said length of said output fiber optic cable;
and
(C) a combination of said light input and output subsystems wherein said first and second control modules are integral with each other.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/158,621Filed 24 Nov 1993
Granted: 2 May 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 5/055
Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves:…
A61B 5/14552
For measuring blood gases: details of sensors specially adapted therefor
G01R 33/283
Details of apparatus provided for in groups G01R33/44 - G01R33/64: intercom or optical viewing arrangements, structurally associated with NMR…
G01R 33/465
NMR spectroscopy: applied to biological material, e.g. in vitro testing