Device for venopuncture

 

(57) Abstract:

The invention relates to a device for punctuation ultrasound therapy (venopuncture). The device has connected in series ultrasonic frequency generator, the output amplifier and the emitter, including the Converter. The generator operates at frequencies of 31 and 40 kHz, on which there is a relaxation in the tissues acupuncture points. The Converter is connected to a core hub with exponential profile shape and relative sizes of the input and output ends of the hub, providing the intensity of ultrasonic vibrations from 0.05 to 0.2 W/cm2. The invention improves the efficiency of venopuncture due to the use of frequencies at which there is a relaxation in the tissues. 4 Il.

The invention relates to punctuation ultrasound therapy (venopuncture) and can be used for therapeutic purposes.

The result of the invention is to improve the efficiency of venopuncture by ultrasound exposure on acupuncture points.

Widely known ancient therapeutic method of Oriental medicine using acupuncture, acupuncture, hyporeflexia is aNISM different nature of the stimuli (needle, burns, cooling) in well-defined areas of subcutaneous tissue - acupuncture points ("kung Hsu"). Irritation accompanied the natural reactions of the body, its systems and organs, and it allows to use this irritation for medicinal purposes.

The disadvantage of the device implementing this method is the need to use needles, which can contaminate and damage the skin and subcutaneous muscle tissue.

Therefore reflexology began to find the use of other devices that are not associated with the introduction of needles: electro, magnetic therapy, laserpuncture, ultraviolet irradiation therapy, metalotherapy (see, for example A. with. The USSR on the application 1707230/31-16, N 460648).

The disadvantage of these devices is their low efficiency, moreover, that modern medical science has not yet determined the optimal modes effects and is not always able to scientifically prove therapeutic mechanisms. (Y. C. Markov. Acupuncture in modern medicine. - St. Petersburg: Nauka, 1992, S. 129-146).

These devices do not require the stringent requirements for asepsis and sterilization of needles, which is very important in this age of AIDS and epidemics of hepatitis. However, in some cases, they are significantly inferior to the most is Tami, it is not always applied in clinical practice. Therefore, considerable interest in methods of treatment with the acoustic effect on the acupuncture points of a human.

It is known device venopuncture, based on the fact that ultrasound provides mechanical and thermal impact. Deforming the cells, it promotes the formation of deformation, heat and potential difference in pressure points, which ultimately leads to a therapeutic effect (A. A. Chirkin. Metabolic reactions to different ways of ultrasonic influence. The dissertation on competition of a scientific degree of the doctor of medical Sciences. - Mn.: 1976, 34; L. R. Gavrilov, E. M. Tsyrulnikov. Focused ultrasound in medicine and physiology. - L.: Nauka, 1980, 179 C.).

Closest to the proposed device is the device venopuncture described in the book C. S. ulaschyk, A. A. Chirkin. Ultrasound therapy. - Minsk: Belarus, 1983, S. 237, S. 108. The device generates acoustic vibrations on the "therapeutic" frequencies of 0.8-2,95 MHz, carrying the message of these vibrations to the patient at a convenient position (sitting or lying) in the acupuncture points using applied to the skin contact media is using ultrasonic therapeutic apparatus "Ultrasound-T-5", apparatus ENT and UST. These devices-prototypes contain connected in series generator ultrasonic frequency of 880 kHz, power output, and the emitter with the causative agent in the form of a piezoelectric plate, and the control unit and power supply (C. C. ulaschyk, A. A. Chirkin. Ultrasound therapy. - Minsk: Belarus, 1983, S. 100).

The drawback of the prototype is the small amplitude of the generated oscillations at frequencies tissue relaxation and high frequency ultrasound, while the relaxation in the muscle tissues is observed on 31 and 40 kHz.

A device for venopuncture, which is the same as the device-prototype contains connected in series ultrasonic generator frequency, power output, and the emitter comprising a Converter. The generator is designed to work at frequencies relaxation, particularly at low ultrasonic frequencies 31 and 40 kHz, and the Converter is connected to a core hub with exponential profile shape and relative sizes of the input and output ends of the hub, providing the intensity of ultrasonic vibrations from 0.05 to 0.2 W/cm2.

The figure 1 shows the dependence of the coefficient of the th device for venopuncture.

The figure 3 shows the device hub.

The figure 4 shows the block diagram of the control unit.

Below is the confirmation of the appropriateness and feasibility of the proposed device venopuncture.

In good approximation we can assume that in tissues (except of bone) of ultrasonic waves propagate as well as in liquids. Transverse waves can not penetrate into the soft tissue to a greater depth, and longitudinal waves propagate as waves of compression and tension.

In any environment the ultrasonic wave is reduced, and the intensity of a plane wave propagating in the X-direction will decrease exponentially depending on the distance travelled

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wherepthe attenuation factor for the amplitude, which is usually expressed in decibels

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The ultrasound attenuation increases with increasing frequency. In many types of soft tissue ultrasound is attenuated equally, and the frequency dependence in dB/cm is approximately linear. In the work edited by S. Webb. Physics of image visualization in medicine. - M.: Mir, 1991, S. 11, it is recommended to use the local (F. G. Portnov. Electrofunctional reflexology. - Riga: Nauka, 1980, 218 S.) acupuncture points is rich in connective tissue, nerve stem, veins, receptors, and effectors. Points are characterized by thinning of the epidermis, colloidal fibers of the dermis. In acoustic terms of tissue at acupuncture points similar muscle tissue. Size of the dots varies from 0.4 to 10 mm2. The depth location from 3 to 25 mm

However, what is significant for the proposed device, in muscle tissue, there is a region of low-frequency relaxation near the frequency of 31 and 40 kHz (Ed. by K. hill. Application of ultrasound in medicine. Physical basis. - M.: Mir, 1989, S. 211). It is shown that the characteristic frequency of many relaxing muscle structure elements lie in the frequency domain in the area of 31 kHz. (X. T. Truong, Extensional wave propagation characteristics in striated musele. - IASA, 1972, N 51, p. 1352-1356; X. T. Sruong, S. R. Iarreft. Longitudinal pulse propagation characteristics in striated musele. - IASA, 1978, No. 64, p. 1299-1302).

As you know, when acoustic relaxation occur internal processes restore thermodynamic equilibrium in the tissues, broken grips and exhaustion in an ultrasonic wave. According to thermodynamic principle, the energy of the translational motion in the sound wave per meniaetsa. Therefore, relaxation is always accompanied by the absorption of sound muscular and nervous tissues. In addition, when relaxation is triggered ferroelectric phenomena in tissues.

Typical frequency dependence of the product ratio of the relaxation absorptionpthe wavelength has a characteristic maximum of the relaxation ratep= 2fp(figure 1). In this figure indicate the relaxation times , i.e. the time during which the parameter characterizing the initial deviation of the system from the equilibrium state, is reduced to e = 2.7 times. The smaller the ratio of the oscillation period T, the more time to restore the disturbed balance. The coefficient of relaxation absorption (I., Mikhailov. Fundamentals of molecular acoustics. - M.: Nauka, 1964, 340 C.) is

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where

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c0- the speed of sound when I

c- the speed of sound in I.

Thus, the most active influence of ultrasound on acupuncture points is carried out in the region of frequencies of 31 and 40 kHz, at which the tissue is actively absorb sound energy. Therefore, our proposed device venopuncture at frequencies tissue relaxation acupuncture points is justified.

When using the low of the device for implementing the proposed method.

As is known, the intensity of the acoustic oscillations of I is determined by the formula

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wherec- the acoustic impedance of the medium in kg/m2with,

= 2f - frequency in 1/s,

0- the amplitude of the oscillatory displacement in m

For increased therapeutic effect it is necessary to maintain the intensity of the acoustic oscillations IWused on high "therapeutic" frequencies, also at low ultrasonic frequencies ILFused in the method. In case of equal intensities IW= ILFyou need to

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i.e. you want to secure a higher amplitude oscillatory displacements in fRF/fLFtime. Therefore, the proposed device with the Converter connected with the prop hub, provides increased amplitude of oscillatory displacement of particles in the environment by reducing the cross-section of a rod.

When venopuncture used the ultrasound intensity is not higher than 0.2 W/cm2. According to the American Institute for ultrasound in medicine ultrasound irradiation virtually no harmful biological effects on tissues at intensities below 0.2 W/cmwho revised 50 j/cm2.

The proposed device, the block diagram of which is shown in figure 2, contains connected in series generator 1 frequency 31 and 40 kHz, power output 2, the Converter hub 3, and contains the power supply unit 4 and the control unit 5.

The design of the Converter hub 3 is shown in figure 3. The emitter includes a housing 6, a core electro-acoustic transducer 7, the core, the hub 8, the membrane 9, the coupler 10, the power cable 11.

The figure 4 shows the block diagram of the control unit, which contains the frequency setting unit 12, the output of which is connected to the generator 1, the unit capacity control 13, the output of which is connected to the amplifier 2, the block power and generator 14, the outputs of which are connected with blocks 1, 2, 4, 12.

The operation of the device is as follows. With the control unit 5 is the power generator 1 and the amplifier 2. The frequency setting unit 12 sets the relaxation rate of the tissue acupuncture points fp. The command unit 14 turns on the generator 1. Electrical fluctuations are amplified in the output amplifier 2. They excite the emitter 3 with S="ptx2">

Example. Used rod half-wave emitter batch type piezoelectric type CTBS-3 density = 7,2103kg/m3, the speed of sound c = 3,5103m/s, dielectric constant = 2300, piezomodulus dik= 20010-12TC/BC Emitter excited oscillations at frequencies of 31 kHz or 40 kHz. To ensure the increase of the amplitude of oscillatory displacement in 20-25 times were used two hub rod type with diameters of d1/d2= 5. The cross-sectional shape is round. Type of longitudinal oscillations. The diameter change was made exponential. Stem length was chosen according to the formula (edited by Rosenberg. Sources of power ultrasound. Physics and technology of ultrasound. - M.: Nauka, 1967, S. 149-206):

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As the material of the rod was selected titanium, which is in great mechanical strength is relatively low wave resistance, and low coefficient of sound absorption. The parameters of titanium, used in the rods: young's modulus 1,161012J/cm2; shear modulus 0,361012J/cm2the density of 4.42 g/cm3the speed of longitudinal waves 4,9105cm/s, shear velocity 2,83105cm/s, ultimate tensile stress 7,2109J/with the inclusion of l1= 6,24 see

Indicators exhibitors were selected according to the formula

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The blocks included in the unit: alternator, powerful amplifier, power, control - conventional designs.

Construction and calculation of used rod piezoceramic transducer is shown, for example, in the book, M Sverdlin. Hydroacoustic transducers and antennas. - Leningrad: Sudostroenie, 1980, C. 90-105.

Thus, there is a practical possibility to create the necessary devices.

Device for venopuncture containing connected in series ultrasonic frequency generator, the output amplifier and the emitter, including the Converter, characterized in that the generator is performed with the opportunity to work at frequencies of 31 and 40 kHz, on which there is a relaxation in the tissues of the acupuncture points, the Converter is connected to a core hub with exponential profile shape and relative sizes of the input and output ends of the hub, providing the intensity of ultrasonic vibrations from 0.05 to 0.2 W/cm2.

 

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FIELD: medicine.

SUBSTANCE: method involves applying thermoacupuncture treatment to local points when pain is localized on posteromedial articulation surface, suprahumeral and posterocervical zone. Needle treatment is applied in harmonizing way to points of generally strengthening action, symptomatic points and points of systemic action. Points of V64, IG4, IG6 are pierced with needles at the first, second, fourth and eighth treatment day. Visceral organs pathology being the case, Shu- and Mo-points of injured meridians are treated with needles.

EFFECT: prolonged remission period.

2 cl

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