GB1074501A - Apparatus for diagnosing bone joint disorders - Google Patents
Apparatus for diagnosing bone joint disordersInfo
- Publication number
- GB1074501A GB1074501A GB2558964A GB2558964A GB1074501A GB 1074501 A GB1074501 A GB 1074501A GB 2558964 A GB2558964 A GB 2558964A GB 2558964 A GB2558964 A GB 2558964A GB 1074501 A GB1074501 A GB 1074501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducer
- joint
- microphones
- microphone
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/006—Detecting skeletal, cartilage or muscle noise
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Rheumatology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
1,074,501. Stethoscopic apparatus. R. E. BRACKIN. June 19, 1964, No. 25589/64. Heading H4J. Apparatus for diagnosing the pathologic state of bone joints comprises an acoustical to electrical energy transducer, a mounting for the transducer for securing the transducer adjacent the bone joint to be diagnosed, a second transducer carried by a mounting intended for connection to a joint and a recording device connected to both transducers. In use the recording device makes two simultaneous visual or aural records of the signals from the transducers, the signals corresponding to the noises emitted by the joints during flexure thereof so that a comparative record of the signals can be obtained. One transducer may be applied to a normal joint, and the other to a joint to be diagnosed. Alternatively the two transducers may be applied to opposite sides of a diseased joint. In a transducer complex 20 (Fig. 1) two microphones (e.g. 51 or 53) convert the sound produced by two bone joints into electrical energy which is transmitted to analysis apparatus 21. This comprises a twin channel amplifier 22 and associated filters 23 which filter out signals below 60 c/s. and possibly above 1000 c/s. Preferably all signals pass through the amplifier 22, but if the amplifier is part of a tape recorder the filters 23 precede the amplifier 22. A twin beam galvanometer 25 receives two input signal simultaneously, each of which swings a light beam on a photo-sensitive paper tape which, when developed, presents traces indicative of the frequency and intensity of the signals received. A graphic analyser 26 may be provided to prepare, for example, a graph of a cartilage click, frequency being plotted against amplitude (Fig. 9, not shown). Transducers.-Each microphone may include a flexible rubber tube (56); Fig. 3 (not shown), in which is secured a hypodermic type needle (55) having a bevelled, end. (60) which, in use, is embedded in subutaneous tissue with the bevelled face directed towards the area under study. The microphone (57) receives sounds from a localized small area of the joint. A double microphone, Fig. 4 (not shown), includes two microphones (65, 66) held on opposite knees by a resilient brace (67) which tends to compress the microphones against the knees. Each transducer may comprise ,three microphones (75, 76, 77) embedded in sponge rubber (78) and each microphone of which has leads (79) for connecting to a selector, switch (80). The microphones (75, 76, 77) are spaced apart to be. adjacent the anterior horn, middle and posterior horn of a knee cartilage. A strap (85) having holes (86) is at one side and a strap, (87) having a stud (88) is at the other side. By selection of the hole (86) into which the stud (88) is positioned the pressure of the microphone against the knee joint may be adjusted. Different pressures attenuate different frequencies. Alternately both straps (85), (87) are apertured and are linked by a stud (88) mounted on a splate. Alternatively the microphone pressure may be varied by varying the tension of a spring (90), Fig. 12 (not shown), by a knurled head (95). The microphones are of crystal or magnetic type.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2558964A GB1074501A (en) | 1964-06-19 | 1964-06-19 | Apparatus for diagnosing bone joint disorders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2558964A GB1074501A (en) | 1964-06-19 | 1964-06-19 | Apparatus for diagnosing bone joint disorders |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1074501A true GB1074501A (en) | 1967-07-05 |
Family
ID=10230126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2558964A Expired GB1074501A (en) | 1964-06-19 | 1964-06-19 | Apparatus for diagnosing bone joint disorders |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1074501A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008018069A3 (en) * | 2006-08-07 | 2008-03-20 | Deepbreeze Ltd | Microphone matrix for recording body sounds |
-
1964
- 1964-06-19 GB GB2558964A patent/GB1074501A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008018069A3 (en) * | 2006-08-07 | 2008-03-20 | Deepbreeze Ltd | Microphone matrix for recording body sounds |
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