Ingestible electronic capsule

• US 20020132226A1
• Filed: 05/06/2002
• Published: 09/19/2002
• Est. Priority Date: 07/24/2000
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: El-Zein, Nada, Nair, Vijay, Grodzinski, Piotr, Goronkin, Herbert
• Application Number:
  US10/139,868
• Publication Number:
  US 20020132226A1
• Time in Patent Office: Days
• US Class Current: 435/4
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/073 Intestinal transmitters
• CPC Class Codes: A61B 5/4255 Intestines, colon or appendix

Abstract

An improved and novel ingestible capsule and method for determining medical information from within the alimentary canal of a human or an animal utilizing the ingestible capsule including a non-digestible outer shell that is configured to pass through the alimentary canal. Housed within the non-digestible outer shell is a sensor membrane that is exposed through a portion of the non-digestible outer shell. The sensor membrane is characterized as detecting and identifying predetermined detectable information. Further housed within the non-digestible outer shell are an electronic device that alters its electronic properties in the presence of specific information obtained by the sensor membrane from within the alimentary canal, a bio-sensing circuit that turns on a power source and a low frequency transducer in response to the signal from the electronic device. The low frequency transducer sends a signal of the changed electronic properties to a receiver positioned outside the body.

Claims

1. An ingestible capsule for determining medical information in the body of a human or an animal comprising:

a non-digestible outer shell that is configured to pass through an alimentary canal in the body of a human or an animal, the non-digestible outer shell housing within;

a bio-sensing circuit;

a driver circuit in electronic communication with the bio-sensing circuit; and

a transducer circuit in electronic communication with the driver circuit.

2. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 1 wherein the bio-sensing circuit includes a sensor membrane and an electronic device, the sensor membrane covered by a dissolvable membrane, the dissolvable membrane dissolving in response to a specific condition thereby exposing the sensor membrane through a portion of the non-digestible outer shell, the sensor membrane characterized as detecting a specific condition that is sought to be detected, thereby identifying predetermined detectable information, the electronic device, electronically responsive to the detection by the sensor membrane of the specific condition and thereby generating a sensing signal.

3. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 2 wherein the driver circuit is electronically responsive to the detection of the sensing signal generated by the bio-sensing circuit, thereby generating a driving signal.

4. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 3 wherein the transducer circuit includes a low frequency transducer characterized as responsive to the driving signal generated by the driver circuit, and thereby generating and submitting an electronic signal to an external receiver positioned outside the body.

5. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 4 further including a power source for powering the bio-sensing circuit, the driver circuit, and the transducer circuit.

6. An ingestible capsule for determining medical information in the body of a human or an animal comprising:

a non-digestible outer shell that is configured to pass through an alimentary canal in the body of a human or animal, the non-digestible outer shell housing within;

a sensor membrane including an integrally formed chemical marker, the sensor membrane covered by a dissolvable membrane, the dissolvable membrane dissolving in response to a specific condition thereby exposing the sensor membrane through a portion of the non-digestible outer shell, the sensor membrane characterized as sensing a specific condition that is sought to be sensed thereby identifying predetermined detectable information;

an electronic device that is electronically responsive to the sensing by the sensor membrane of the specific condition;

a driver circuit that is electronically responsive to the signal submitted by the electronic device;

a low frequency transducer that sends a signal generated in response to the signal received from the driver circuit to a remote receiver positioned outside the body; and

a power source for supplying power to the electronic device, the driver circuit and the low frequency transducer.

7. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 6 wherein the sensor membrane reacts to a pre-identified condition, characterized as one of a level of an enzyme, an antigen, or an antibody.

8. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 6 wherein the electronic device submits an electrical signal which turns on the driver circuit.

9. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 6 wherein the transducer is a miniature transducer formed on a ceramic or a plastic material.

10. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 9 wherein the transducer emits an ultrasonic signal to the remote receiver positioned outside the body.

11. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 6 wherein the transducer emits an audible signal to the remote receiver positioned outside the body.

13. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the sensor membrane includes a chemical marker.

14. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the sensor membrane includes a chemical marker for reacting to a pre-identified condition, evidenced by the presence of one of an enzyme, an antigen, or an antibody.

15. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the power source is a miniature battery.

16. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the transducer is a miniature transducer formed on a ceramic or a plastic material.

17. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the electronic device is one of an ISFET or a functionalized metal electrode.

18. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the transducer emits an audible signal to an externally remote receiver.

19. An ingestible capsule for determining medical information in the body of a human or an animal as claimed in claim 12 wherein the transducer emits an ultrasonic signal to an externally remote receiver.

12. An ingestible capsule for determining medical information in the body of a human or an animal comprising:

a non-digestible outer shell that is configured to pass through an alimentary canal in the body of a human or an animal, the non-digestible outer shell housing within;

a bio-sensing circuit, including a sensor membrane and an electronic device, the sensor membrane covered by a dissolvable membrane, the dissolvable membrane dissolving in response to a specific condition thereby exposing the sensor membrane through a portion of the non-digestible outer shell, the sensor membrane characterized as detecting a specific condition that is sought to be detected, thereby identifying predetermined detectable information, the electronic device, electronically responsive to the detection by the sensor membrane of the specific condition and thereby generating a sensing signal;

a driver circuit that is electronically responsive to the detection of the sensing signal generated by the bio-sensing circuit, thereby generating a driving signal;

a transducer circuit, including a low frequency transducer characterized as responsive to the driving signal generated by the driver circuit, and thereby generating and submitting an electronic signal to an external receiver positioned outside the body; and

a power source for powering the bio-sensing circuit, the driver circuit, and the transducer circuit.

20. A method for obtaining diagnostic medical information comprising the steps of:

ingesting into the alimentary canal of a human or animal, an electronic capsule including a sensor membrane characterized as identifying predetermined detectable information, an electronic device that alters its electronic properties in the presence of a chemical reaction between the sensor membrane and a specific enzyme, antibody or antigen and generates a sensing signal in response thereto, a driver circuit that turns on and off a power source in response to the sensing signal generated by the electronic device, a low frequency transducer for generating and sending an electronic signal of the changed electronic properties to outside the body, and a miniature battery for powering the driver circuit; and

remotely positioning a receiver characterized as receiving the electronic signal from the low frequency transducer.