Pulmonary diagnostic instrument including breath transducer

• US 3,946,726 A
• Filed: 08/07/1974
• Issued: 03/30/1976
• Est. Priority Date: 08/07/1974
• Status: Expired due to Term

• Current Assignee: Puriton-Bennett Corporation
• Original Assignee: Puriton-Bennett Corporation
• Inventors: Pikul, Richard E.
• Primary Examiner(s): Frinks, Ronald L.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/495,329
• Time in Patent Office: 601 Days
• Field of Search: 128/2.08, 128/2.07, 128/2 C, 128/DIG. 29, 272/57 F, 73/228
• US Class Current: 600/538
• CPC Class Codes: A61B 5/0876 using means deflected by the fluid stream, e.g. flaps
• CPC Class Codes: G01F 1/20 by detection of dynamic effects of the flow

Abstract

In a pulmonary diagnostic instrument that includes a breath transducer for use in conjunction with the instrumentation for detecting respiratory functioning of a patient or specimen, the transducer comprises a flow tube in which is suspended for lineal displacement a partial diaphragm generally constructed as a foraminous plate, and which during testing, the specimen'"'"'s breath flows therethrough to achieve some degree of displacement of said diaphragm. The diaphragm incorporates and operates in association with various ferrous rings for enhancing the transfer of magnetic lines of flux which are generated by a charged E-core for determining the extent of said lineal displacement which is representative of and can be interpreted to provide information pertaining to pulmonary functioning for diagnosis of the respiratory system of the specimen. In another embodiment charged capacitive plates replace the aforesaid ferrous rings and E-core, and through a developed capacitive imbalance caused by the breath induced diaphragm displacement providing information that may be interpretive of pulmonary functioning, or flow of air.

Claims

1. A diagnostic instrument for use in detecting lung disfunction through specimen breathing and comprising a flow tube means adaptable for accommodating the flow of specimen breath therethrough, a resiliently mounted diaphragm means disposed within said tube means and subject to complete and uniform lineal displacement due to the force of the moving breath thereby, said diaphragm means comprising a plate means, said plate means having at least one aperture provided therethrough for allowing the obstructed passage of the breath there past, at least one conductive ring, said ring being secured to a side of the apertured plate means, said ring being mounted around the periphery of said apertured plate means, suspension means supporting the apertured plate means and ring within the flow tube means, said suspension means providing for peripheral mounting of said plate means within said flow tube means, said suspension means comprising a series of arcuate arms each having one end connected to and extending from the periphery of said plate means, the other end of each said arcuate arms secured within the flow tube means, said arcuate arms having sufficient resiliency to provide for the uniform lineal displacement of the full apertured plate means and ring within the flow tube means during passage of the specimen breath therethrough, and means cooperating with said flow tube means for detecting the degree of said lineal displacement of the ring for providing representative information pertaining to pulmonary functioning for specimen diagnosis.

2. The invention of claim 1 wherein there are a series of apertures provided through said plate means.

3. The invention of claim 2 wherein said apertured plate means comprises a foraminous plate.

4. The invention of claim 3 wherein said foraminous plate comprises a screen.

5. The invention of claim 3 wherein said foraminous plate is constructed of beryllium copper.

6. The invention of claim 3 wherein said foraminous plate is constructed of stainless steel.

7. The invention of claim 1 wherein there are a pair of said conductive rings, one of each ring being secured to each side of the apertured plate means, and said rings being made of ferrous material.

8. The invention of claim 7 and including a housing provided for accommodating said flow tube means during instrument operation, said housing providing means for facilitating the retention of said flow tube means, said housing having a passage therein through which the flow tube means is removably inserted, said housing containing the detecting means for cooperating with the conductive rings of the diaphragm means of the flow tube means for determining the degree of lineal displacement of the apertured plate means and providing representative information pertaining to pulmonary functioning for specimen diagnosis.

9. The invention of claim 8 wherein the detecting means comprises an electrically operative means.

10. The invention of claim 9 wherein, said conductive rings being made of magnetic flux transferring material, said electrical detecting means comprising a core and associated coil capable of conducting a reference current therethrough, the displacement of the plate means and rings by the passage of specimen breath there past influencing the inductance resulting from current flow in the coil thereby providing representative information decipherable into pulmonary functioning for specimen diagnosis.

11. The invention of claim 10 wherein said core comprises an E-core having a pair of coils provided thereon, each coil capable of being charged, the generated inductances resulting from the charge in each coil being influenced by the displacement and location of the plate means and its associated rings and providing detectable information decipherable into pulmonary functioning for specimen diagnosis.

12. The invention of claim 8 and including a stop means provided upon said flow tube means and cooperating with said housing to limit the extent of flow tube means insertion therein.

13. The invention of claim 12 wherein said stop means comprises an annulus formed integrally upon the said flow tube means and provided for encountering a side of the housing to limit the extent of flow tube means insertion therein.

14. The invention of claim 13 and including a guide means provided upon said flow tube means and cooperating with said housing to provide proper positioning of said flow tube means when being inserted into the housing.

15. The invention of claim 14 wherein said guide means comprises an index tab integrally connecting and extending partially along the length of said flow tube means and said housing includes a slot receiving said tab to provide for proper positioning of said flow tube means in the same.

16. The invention of claim 1 wherein said arcuate arms are integral with said apertured plate means.

17. The invention of claim 16 wherein there are three arcuate arms extending between the apertured plate means and the flow tube means.

18. The invention of claim 16 wherein said arcuate arms are arranged adjacent the periphery of the apertured plate means.

19. The invention of claim 1 wherein said flow tube means is separable proximate the location of the apertured plate means therein, thereby facilitating the mounting of said plate means during instrument manufacture.