Blood content detecting capsule

• US 8,162,828 B2
• Filed: 11/08/2007
• Issued: 04/24/2012
• Est. Priority Date: 11/08/2007
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Medical Systems Corporation (Olympus Corporation)
• Inventors: Gono, Kazuhiro, Suga, Takeshi
• Primary Examiner(s): Jaworski, Francis
• Application Number:
  US11/937,133
• Publication Number:
  US 20090124874A1
• Time in Patent Office: 1,629 Days
• Field of Search: 600/101, 600/103, 600/109, 600/112, 600/302, 600/341, 600/409, 600/424, 600/476
• US Class Current: 600/302
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/1459 invasive, e.g. introduced into the body by a catheter A61B5/1464 takes precedence
• CPC Class Codes: A61B 5/6861 Capsules, e.g. for swallowing or implanting

Abstract

A capsule employing components for detecting blood content or hemoglobin concentration within tissue forming a lumen in vivo advantageously permits screening or diagnosis of certain diseases. In one embodiment, the capsule includes a light source for intermittently illuminating a region of tissue and a light detector for receiving interacted light from the tissue and hemoglobin therein. Methods of validating data of interacted light signal are also disclosed. A power conservation method of detecting the blood content values at different rates is further disclosed.

Claims

1. A system for detecting blood content in living tissue comprising:

a capsule disposable in a lumen of a living organism, said capsule comprising a detector for detecting a characteristic indicative of blood content of tissue forming the lumen, a transmitter, and a controller for controlling time intervals at which the detector generates a signal indicative of the characteristic, the controller being coupled to the detector;

a processing unit comprising a receiver for receiving a signal transmitted by the transmitter; and

a data validator for generating a control signal based on whether the signal indicative of the characteristic satisfies a predetermined condition, wherein the controller is capable of adjusting intermittent time intervals at which the detector detects the characteristic based on the control signal output from the data validator such that when the detected characteristic indicative of the blood content is greater than the predetermined condition of a threshold value, the controller shortens the time intervals for detecting the blood content relative to when the detected characteristic indicative of the blood content is lower than the threshold value.

2. The system as claimed in claim 1, wherein the capsule further comprises:

a light source for illuminating a tissue location; and

a sensor provided in the detector so that the detector detects interacted light from the tissue location and generates a signal indicative of said characteristic.

3. The system as claimed in claim 1, wherein the data validator is disposed in said capsule.

4. The system as claimed in claim 1, wherein the data validator is disposed in said processing unit.

5. The system of claim 1, wherein the controller controls an activation timing of the transmitter to transmit information related to a characteristic indicative of blood content to the processing unit.

6. The system of claim 1, wherein the data validator determines based on a predetermined threshold value whether a characteristic value related to the characteristic detected by the detector is valid.

7. The system of claim 1, further comprising:

a blood content estimator for calculating a blood content based on the characteristic detected by the detector, wherein the data validator determines based on a predetermined threshold value whether data of the blood content calculated by the blood content estimator is valid.