Gas supersaturation monitoring

• US 9,033,882 B2
• Filed: 06/10/2010
• Issued: 05/19/2015
• Est. Priority Date: 06/10/2009
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Gu, Alex, Yang, Wei, Tobias, Peter
• Primary Examiner(s): Le, Long V
• Assistant Examiner(s): PENG, BO JOSEPH
• Application Number:
  US12/797,982
• Publication Number:
  US 20100317970A1
• Time in Patent Office: 1,804 Days
• Field of Search: 600/438
• US Class Current: 600/438
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 8/4472 Wireless probes
• CPC Class Codes: A61B 8/481 involving the use of contrast agent, e.g. microbubbles introduced into the bloodstream analysis of echo signal exploiting properties of a contrast enhancer in devices for short-range imaging with acoustic waves G01S7/52039
• CPC Class Codes: B63C 11/18 Air supply for diving masks B63C11/14, B63C11/16; respiratory apparatus in general A62B

Abstract

A system and method include generating at least one bubble in tissue using ultrasound. The at least one bubble generated is detected and correlated to gas saturation of the tissue.

Claims

1. A system comprising:

a scuba mouthpiece including;

an ultrasound generator adapted to be placed proximate living tissue to induce bubble formation in the tissue; and

a bubble detector adapted to be placed proximate the tissue to detect bubbles induced in the tissue; and

processing circuitry coupled to the bubble detector to calculate the rate of the bubbles dissolving and gas saturation in the living tissue in real-time, of a diver at an immersion depth.

2. The system of claim 1 wherein the bubble detector emits light and measures light scattering due to bubbles in the tissue.

3. The system of claim 1 wherein the ultrasound generator and bubble detector are integrated into the scuba mouthpiece such that the ultrasound generator and the bubble detector are adjacent to a tongue, lip or cheek tissue of the diver.

4. The system of claim 1 and further comprising a display coupled to the processing circuitry to provide information to at least one of a diver, accompanying divers, and a base station, as a function of the detected bubbles.

5. The system of claim 1 wherein the processing circuitry uses information about the composition of the breathing gas, stored in its memory or received from another system, to improve its calculations of gas saturation of tissues.

6. A system comprising:

a scuba mouthpiece including a transducer adapted to generate a first plurality of pulses to generate bubbles in living tissue and to generate a second plurality of pulses to detect bubbles in living tissue

processing circuitry coupled to the transducer to control generation and detection of the bubbles and to calculate the rate of the bubbles dissolving and the gas saturation in the living tissue in real time; and

a display coupled to the circuitry to provide information in real time regarding ascent to a diver wearing the transducer;

wherein the power of the first plurality of pulses for generating bubbles is greater than the power of the second plurality of pulses for detecting the generated bubbles.