NON-INVASIVE PNEUMOTHORAX DETECTION AND APPARATUS

• US 20100222663A1
• Filed: 02/26/2010
• Published: 09/02/2010
• Est. Priority Date: 02/27/2009
• Status: Abandoned Application

• Current Assignee: Pneumosonics, Inc.
• Original Assignee: Pneumosonics, Inc.
• Inventors: Yoder, Raymond Lloyd, Wilder, Steve, Theobold, David, Fell, Roger B.
• Application Number:
  US12/713,616
• Publication Number:
  US 20100222663A1
• Time in Patent Office: Days
• US Class Current: 600/407
• CPC Class Codes: A61B 5/0507 using microwaves or terahertz waves
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/0803 Recording apparatus specially adapted therefor

Abstract

Provided is a micropower impulse radar (MIR) pneumothorax detector. The detector includes a processor and a handheld MIR scanner. The handheld MIR scanner includes a device housing, an antenna located within the device housing, circuitry that generates MIR signals, and circuitry that processes received echoes of the MIR signals and provides the processed received echoes to the processor. The processor automatically determines whether a pneumothorax is present based on the processed received echoes of the MIR signals.

Claims

1. A micropower impulse radar (MIR) pneumothorax detector, comprising:

a processor; and

a handheld MIR scanner, comprising;

a device housing;

an antenna located within the device housing;

circuitry that generates MIR signals; and

circuitry that processes received echoes of the MIR signals and provides the processed received echoes to the processor, wherein the processor automatically determines whether a pneumothorax is present based on the processed received echoes of the MIR signals.

2. The MIR pneumothorax detector of claim 1, wherein the antenna is a horn antenna forming a radiation cavity and an antenna aperture, the horn antenna comprising a radiator including a curved fin located within the radiation cavity, and a radome substantially covering the antenna aperture, wherein the MIR signals are transmitted from the handheld MIR scanner by the radiator.

3. The MIR pneumothorax detector of claim 1, wherein the MIR signals include a plurality of sub-nanosecond pulses,

wherein the circuitry that generates the MIR signals includes a step recovery diode, and

wherein the circuitry that processes the received echoes of the MIR signals includes another step recovery diode and a range-squared amplifier.

4. The MIR pneumothorax detector of claim 1, wherein the processor is a remote processor that is remote from the handheld MIR scanner.

5. The MIR pneumothorax detector of claim 1, wherein the processor is located within the device housing.

6. The MIR pneumothorax detector of claim 1, wherein the processor determines whether a scanning error has occurred based on the processed received echoes of the MIR signals.

7. The MIR pneumothorax detector of claim 1, wherein the processor determines whether metal is present in a scanning field of the pneumothorax detector based on the processed received echoes of the MIR signals.

8. The MIR pneumothorax detector of claim 1, wherein the processor determines whether the pneumothorax is present based on comparing amplitudes of at least some of the received echoes to normal data.

9. The MIR pneumothorax detector of claim 1, wherein the processor determines whether the pneumothorax is present by statistically correlating at least some of the received echoes to reference data.

10. The MIR pneumothorax detector of claim 9, wherein the reference data is obtained by cross-correlating received echoes.

11. A method of non-invasively detecting the presence of a pneumothorax, comprising the steps of:

providing a handheld micropower impulse radar (MIR) scanning device, wherein the MIR scanning device transmits MIR signals and receives and processes echoes of the MIR signals;

scanning a first right torso location of a patient using the MIR scanning device;

scanning a second right torso location of the patient using the MIR scanning device;

scanning a first left torso location of the patient using the MIR scanning device

scanning a second left torso location of the patient using the MIR scanning device;

automatically determining whether a right-side pneumothorax is present based on results of scanning the first right torso location and the second right torso location; and

automatically determining whether a left-side pneumothorax is present based on results of scanning the first left torso location and the second left torso location.

12. The method of claim 11, wherein the steps of automatically determining whether the right-side pneumothorax is present and automatically determining whether the left-side pneumothorax is present are performed by the handheld MIR scanning device.

13. The method of claim 11, wherein the steps of automatically determining whether the right-side pneumothorax is present and automatically determining whether the left-side pneumothorax is present are performed by a remote processor.

14. The method of claim 11, wherein one of the first right torso location and the second right torso location is substantially on a right anterior axillary line of the patient and the other one of the first right torso location and the second right torso location is substantially on a right midclavicular line of the patient, and

wherein one of the first left torso location and the second left torso location is substantially on a left anterior axillary line of the patient and the other one of the first left torso location and the second left torso location is substantially on a left midclavicular line of the patient.

15. The method of claim 11, further comprising the step of automatically determining whether a scanning error has occurred.

16. The method of claim 11, further comprising the step of automatically determining whether metal is present in the torso.

17. The method of claim 11, further comprising the steps of:

scanning at least two further right torso locations of the patient using the MIR scanning device, wherein the step of automatically determining whether a right-side pneumothorax is present is further based on results of scanning the at least two further right torso locations; and

scanning at least two further left torso locations of the patient using the MIR scanning device, wherein the step of automatically determining whether a left-side pneumothorax is present is further based on results of scanning the at least two further left torso locations.

18. The method of claim 17, wherein both of the first right torso location and the second right torso location are substantially on a right anterior axillary line of the patient,

wherein both of the first left torso location of the patient and the second left torso location of the patient are substantially on a left anterior axillary line of the patient,

wherein the at least two further right torso locations of the patient are substantially on a right midclavicular line of the patient, and

wherein the at least two further left torso locations of the patient are substantially on a left midclavicular line of the patient.

19. The method of claim 11, further comprising the steps of:

determining reference data,

wherein the step automatically determining whether a right-side pneumothorax is present includes statistically correlating the results of scanning the first right torso location and the second right torso location with the reference data, and

wherein the step of automatically determining whether a left-side pneumothorax is present includes statistically correlating the results of scanning the first left torso location and the second left torso location with the reference data.

20. The method of claim 19, wherein the step of determining reference data includes cross-correlating scanning results.

21. The method of claim 11, further comprising the steps of:

providing normal right torso data; and

providing normal left torso data;

wherein the step of automatically determining whether a right-side pneumothorax is present includes comparing the results of scanning the first right torso location and the second right torso location to the normal right torso data, and

wherein the step of automatically determining whether a left-side pneumothorax is present includes comparing the results of scanning the first left torso location and the second left torso location to the normal left torso data.

22. An antenna, comprising:

a base;

a horn extending from the base, wherein the horn forms a radiation cavity, and wherein the horn forms an antenna aperture into the base;

a radome comprising a dielectric material located within the base and substantially covering the antenna aperture; and

a radiator located within the radiation cavity, the radiator comprising a curved fin.

23. The antenna of claim 22, further comprising a termination resistor electrically coupled to the radiator, wherein the radiator is electrically coupled to the horn through the termination resistor.

24. The antenna of claim 22, further comprising a connector penetrating a closed end of the horn, wherein the connector includes a center conductor that is electrically coupled to the radiator.

25. The antenna of claim 24, wherein the horn includes a wall extending from the antenna aperture to the closed end, and wherein the antenna further comprises an internal ridge projecting from the wall into the radiation cavity.

26. The antenna of claim 22, further comprising a device housing,

wherein the antenna is located within the device housing,

wherein circuitry that generates MIR signals and processes received echoes of the MIR signals is further located within the device housing, and

wherein the MIR signals are transmitted from the radiator and received by the radiator.