FI60643C - INSTRUMENT FOER DIAGNOSERING AV AKUT SINUIT - Google Patents

Description

TZSZ * r «rt M4 \ ADVERTISEMENT PUBLICATION tfssAi 40J & ™ * * UTL & GGN I NGSSKRI FT O 4 3 C (^ 5) Patent iayinnetty 10 03 1902 uQyy Patent jneddelat’ (51) Ky.ik? /IiK.ci. A 61 B 10/00

FINLAND — FINLAND (21) PM «nttlhak« mu * - Pat * ntmn * eknlnf 791 ^ * 7 U

(22) Htkamispdvl - Anseknlnpdtg 09-05.79 (23) Starting date — GIMfhettdag 09.05.79 • (H) Tullut JulkiMksI - Bllvlt offanttlg 10.11.80

Patent] · Registry Board .... ...._____. . . ,. ,. , N..n, '. ^ ___. (44) Date of publication and date of issue. - on 11 fil Patents och registerstyrelsen '' Anutkan utiagd odi uti.ikr) ft «n puMicwad ^ x '(32) (33) (31) Pyy« i «« y privilege * —e «|» rd prtorKct (71) (72) Matti Revonta, Ear Clinic, TYKS, U-hospital, 20520 Turku 52,

Pekka Meriläinen, Department of Physics, University of Helsinki, 00170 Helsinki 17,. Mauri Luukkala, Department of Physics, University of Helsinki, .00170 Helsinki 17, Finland-Finland (Fl) (7 * 0 Mauri Luukkala (5M Device for detecting sinusitis - Instrument för diagnosering av akut sinuit

According to Finnish treatment practice, sinusitis is treated as a condition in which secretions accumulate in the cavity as a sign of impaired secretion transfer and constriction of the duct between the cavity and the nose as a result of the inflammation. Swedish researchers (Axelsson et al. 1978) "have shown that an experienced ophthalmologist can diagnose half of two-thirds of sinusitis, and even less so of forehead sinusitis, on the basis of symptoms and findings.

Several authors have criticized the role of X-ray discovery in the determination of buccal secretion, and consider, for example, pediatric X-ray discovery to be so uncertain that no diagnosis can be made; The suggestive diagnosis of the forehead cavity is based almost exclusively on the X-ray, despite its sources of error, because no better diagnostic method has been available.

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The idea of ultrasound examination as an indicator of a secreted cavity is already known, although it has not reached the user population, mainly due to the high cost and complexity of the equipment. In recent years, data on the method and its reliability have been published to show the secretion of the buccal cavities in both adults and children (Revoilta 1975}. descriptions.

I The indication of cavity secretion is based on the indication of an echo reflected from the bony posterior wall I. The absence of this echo marks-I see the airy area in the cavity. The air in the cavity causes a total reflection of the I ultrasonic pulse and the distance of this strong echo from the sensor describes the thickness of the anterior wall mucosa.

The present invention provides an ultrasound device constructed from per se known transmitter, receiver, amplifier and control device implementations that detects sinusitis or forehead inflammation such that the ultrasound probe includes a sheath; si the ultrasonic crystal also has a row of signal lamps »in which the signal lamp in a position corresponding to the back wall of the buccal cavity (or i forehead cavity) lights up when the cavity is filled with secretion. This requires that the stripe head be aligned against the back wall of the cavity so that the reflected echo returns to the ultrasonic rope. The echo burning in the crystal illuminates this indicator lamp via the electronics of the device. If the patient does not have sinusitis,; that is, the cavity is inflated, the signal lamp I does not light up in the signal lamp row · i In current equipment, the sensor is attached to the ultrasonic circuit either by cable or joints Ϊ. The researcher alternately monitors the position of the sensor in the study area, alternately the image tube. This shift in gaze results in inaccuracy in printing because the orientation and position of the sensor is easily altered due to the small size of the area to be examined, and erroneous results are obtained.

The invention presented here seeks to improve the orientation possibilities of the sensor compared to the previous research equipment by connecting the display device to the sensor and thus bringing it into the same field of view as the object to be examined. In the invention, the conventional cathode-ray tube-based display device has been replaced by a small, space-consuming and clear-readable line of light-emitting diodes, which is furthermore an inexpensive solution compared to a cathode-ray tube. The LEDs describe the echoes of the interfaces reflected from the whole area of the depth scale, such as st-mapping or B-mapping, however, so that the sum of the adjacent echoes controls one LED. The brightness of the LED reflects the corresponding height of the echo peak of the A-imaging. The display device assembled from the Valodirdc is as useful in imaging the c-Rite of the cavities as the A-image in conventional ultrasonic devices.

The advantages are simple and durable construction, small size and good readability. The invention is characterized by the features set forth in the claim.

Figure 1 schematically illustrates the principle of the invention.

A novelty in the present invention is an ultrasonic head 4 comprising a row of scintillation lamps 5 and a crystal 3. If the patient has a cavity filled with secretion, the indicator light 2 at the location corresponding to the back wall lights up. The other control electronics included in the device are located elsewhere. The portions of the LED array are controlled for the corresponding depth range by reflected, received, and amplified echo information, from any range of the scale as in previous ultrasound scanner applications in the A-image readable from the cathode ray tube. The display device is placed in connection with a conventional ultrasonic transducer 3 in a handpiece, where its display can be detected simultaneously with the orientation and positioning of the transducer in the same field of view, thus enabling more accurate elimination of erroneous echoes and accurate diagnosis.

Known electronic solutions are used to generate, transmit, receive, amplify, and edit an ultrasonic pulse for printing.

When the device is used, the sensor crystal 3 is passed through the contact medium to the front wall of the cavity and is directed in a certain direction towards the assumed rear wall of the cavity. If echoes are observed only in the anterior wall area of the cavity, the cavity is considered healthy. If the depth of the anterior region is greater than usual, the cavity is assumed to be mucosal thickening. If a strong (bone) echo is observed from the depth of the putative posterior walls of the cavity, the cavity is considered to be filled with secretion or the like.

Clinical trials show that this research technique and equipment solution achieves an accuracy of more than 85/6, which is better than a conventional X-ray finding accuracy.

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It should also be noted that the interface of the secretion in the cheek or forehead cavity can be found by moving the sensor head while maintaining its orientation in the vertical plane. When the upper surface of the fluid is reached, the echo disappears from the back wall of the cavity. This is detected when the indicator light goes out.

Swedish SE-Kuulutus publication No. 359441 discloses an ultrasonic transmitter for the detection of the center of the brain by a pulsed echo method. The inventive step of this Swedish device is a spring-loaded sensor tube that can move in a kind of sleeve. This sleeve has a scale from which the distance of the obtained echo can be read. Furthermore, a potentiometer is attached to this spring-loaded movable sensor tube by means of a gear, the position of which depends on the pressure of the sensor tube inside the core tube. The signal given by this potentiometer in turn adjusts the so-called opening position of the electronic gate so that if the received echo signal falls from the opening times of the gate, an alarm signal is heard from the loudspeaker connected to the device. In this case, the distance of the obtained echo can be read from the scale on the side of the tube. The device in our present patent application does not have the aforementioned spring-loaded sensor tube, a potentiometer connected to it, nor an electronic gate dependent on the depression of the sensor tube. The echo received in the present patent application is indicated by a row of LED lamps, whereby the echo obtained automatically indicates whether the echo is obtained from the back wall of the cavity or not. With the device according to the Swedish patent, it is very difficult to determine whether an echo is obtained or not, because when examining the buccal cavity, the sensor has to be moved on the surface of the skin to determine the secretion of the cavity. With the device according to the Swedish patent, the depth measurement is performed by pressing the above-mentioned sensor inside the sleeve tube, while according to the present patent application, the depth examination takes place completely electronically as the LED lamps turn on or off.

Literature: Axelsson, Brorson, Jensen: "Akut Sinuit",

Clinic and Therapy, Astra (1978).

Revonta, M .: "Diagnosis of sinusitis in children by ultrasound", Duodecim 1979: 95: 908-913