RU1951U1 - CAPILLARY WALL RESISTANCE METER - Google Patents

Abstract

RESISTANCE METER FOR CAPILLAR WALLS, comprising a resistance sensor including a housing, a magnifying lens, a skin deformer, a vacuum chamber, an annular retainer, and support platforms, characterized in that it is equipped with a vacuum dispenser comprising a handle connected to a threaded pair, a corrugated cylinder fixed to the base with reference fuses and dial gauge of pressure, and the internal closed object of the corrugated cylinder through the channel communicates with the resistive sensor.

Description

M. C.- A 61 V 5/02 The meter of resistance of the walls of the capillary in the Invention relates to the field of medical technology and will find application for the study of resistance of the vascular wall of the capillaries. Measurement of the resistance of blood capillaries of the skin allows us to judge the tension of the adaptive mechanisms of the body and reflects the various degrees of pre-pathological condition that characterize the transition from health to disease / D.N. Vilensky, 1952.1957; V.V. Stavskaya, 1955; O.K. Shaposhnikov, 1957; Y.S. Yarusova et al., 1957; I.S. Candor, 1962.1968; A.F. Alexandrov, 1964; V.A. Erenkov, 1965; N.A. Dehnich, 1967; I.A. Oyvin, 1967; V.I. Bobrov et al., 1969; I.V-Sinodsky, 1970; V. And "Yakovlev, 1970 I.M. Borisov et al., 1973; E.A. “Coot, 1975; J.J.“ Rapoport, 1979 and others. Skin is an important gland of external and internal secretion, with a vast surface, richly equipped with vessels, closely connected with all internal organs, with other endocrine glands and with connective tissue, there is not a single disease with morphological changes, there is not a single functional disorder, with wherever the state of capillaries plays a paramount role. Without knowledge of the physiopathology of capillaries, medicine remains on the surface of phenomena and is not able to understand anything in general or in particular pathology / A.S. Zalmanov, 1963 /. To determine the functional state of capillaries, the method of A. I. Nesterov, 1932 and various modifications of the apparatus and methods of A. I. Nesterov. / G-I. Kogan, 1930; M.S. Aznauryan D963; A.F. Alexandrov, 1964; V.A. Erenkov, 1967; V.A. Yakovlev, 1970; A.S. Shitikova et al., 1974; Z.A. Kost, 1975; L.I.Shifrin et al., 1978 and others. The main disadvantages of existing devices are the imperfection of constructive solutions and the traumatic solution of the can - the suction cup of the studied skin area. A more sophisticated device for measuring the resistance of capillary capillaries is the Instrument for measuring the resistance of capillary walls, copyright certificate No. 1093320, published Discovery and Invention Bulletin, 1984, I 19, p. 14. However, the device device has a complex constructive solution, acts on a large area of the studied surface of the skin, has a limited measurement range and does not allow observation of the nature of petechial changes during the experiment. A new technical solution in determining the resistance of capillaries, in comparison with the known ones, is the device of a resonance microscope, copyright certificate A1 151 344, published - Bulletin of Discovery and Invention, 1989, L-38, p.21 ..., h.,, A significant drawback of resistometer This is a large number of working units connected by a piping system that do not provide sufficient sealing and, consequently, the accuracy of measurements.

As a basic device and adopted as a prototype

of the claimed invention is a resistoscope, application No. 4611560/14 / 166388 /, according to which a decision was made by the state scientific and technical examination of inventions of October 30, 1990 on the issue of a copyright certificate. The resistoscope has a negative pressure adjuster assembly in the form of a syringe containing a cylinder, a piston with a rod and a rod head is placed inside the cylinder, the tip of the syringe is equipped with cone-shaped consoles. The syringe is mounted on the platform between the front retainer and the rear retainer of the syringe, it is equipped with a graduated in mm. Hg. with t. scale, a movable support of the rod head, a guide groove and a fixed support.

the resistive sensor is equipped with a distribution column containing a kinfol with a hole, a three-way valve, a fitting, a capillary pressure safety device; it has a magnifying lens, a cylindrical body, a skin deformer with holes, a vacuum chamber, an annular retainer and support pads made of transparent material / for example, organic glass /.

Syringes of various capacities from 5 to 20 ml are used as an indicator of negative pressure, depending on the magnitude of the created working negative pressure,

equipped with a graduated scale in mmHg, from 0 to 400 mm.

Hg, for a syringe with a capacity of 5 ml and from about to 600 mm Hg. for a syringe with a capacity of 20 ml, moreover, an increase in partial vacuum

above the indicated values is achieved by repeated movements of the piston for discharge, after closing the three-way valve at each return of the syringe to its original position.

- 3,, The device of the resistoscope is a new constructive solution in determining the resistance of skin capillaries, in comparison with the known devices and devices used for this purpose. A significant drawback of the resistoscope is the use of a record-type syringe as a negative pressure connected through a three-way valve of the distribution column to the resonance sensor. gradual wear of the rubbing parts of the syringe: the piston and cylinder, as well as leaks in the connection of the syringe with the dispensing column through the cannulas and parts of the three-way valve, often violate the tightness of the device and distort the results of the experiment. Thus, these shortcomings of the resistoscope reduce the sensitivity of the technique and the accuracy of measuring the resistance of capillaries, they require the creation of a more modern device. The purpose of the present invention is to simplify the design and increase the sensitivity of the measurement by using a vacuum dispenser, sealing the device and smoothly building up a partial vacuum. This goal is achieved by the fact that a predetermined negative pressure is created by a vacuum dispenser containing a handle connected to a threaded pair, mounted on the base of a guarded cylinder with support fuses and a pressure gauge, the internal closed volume of the corrugated cylinder being connected via a channel to a resistive sensor. Figure 1 schematically shows the proposed meter of resistance of the walls of the capillaries - General view; figure 2 is the same in section; Fig. 3 is also a bottom view. .. 5 The capillary wall resistance meter has a vacuum dispenser containing a handle I mounted on axis 2, the threaded part of axis 2 is connected to the threaded part of bracket 3, mounted on base 4, axis 2 is mounted in its retainer b of cover 7 of corrugated cylinder 8 and Z9 $ is protected from axial movements by cover 7, a pressure gauge 9 is mounted on the S i cover. The corrugated cylinder 8 is equipped with ring support fuses Yu and is fixed on the base 4 by a flange And forms a closed space your cylinder 12 is 8, connected via a channel 13 with a rezono-sensor 14. The resisto-sensor 14 is made of heat-insulating material / for example organic glass and contains a cylindrical body 15, a magnifying lens 16, a skin deformer 17 in the form of a plate with sixteen holes 18, a vacuum a chamber 19, a vacuum cavity 20, an annular retainer 21 and a support platform 22 / for holding the sensor with two fingers and focusing the lens / on the study area by tilting the sensor in the direction of light /. A corrugated cylinder 8 of a vacuum dispenser is used as an indicator of negative pressure, with a variable capacity, in the initial / zero / position, cylinder 8 is pressed and its internal volume is I cm3, in expanded form it reaches 12 cm and has a working volume of cm cm3, which by graduation scale 23, mounted on the bracket 3, is divided by divisions in mmHg from 0 to 500 mm Hg The price of one division is I mm and corresponds to a volume of 0.5 cm3. The graduation of the vacuum dispenser is based on the Boyle-Marietta law.

According to the law, the product of pressure of a given mass of gas by its volume is constant if the gas temperature does not change:

FiV, P2Vi

CALCULATION METHOD

It was found that the volume of the channel 13, the vacuum chamber 19, the vacuum of the cavity 20 and the cylinder-in the initial position is 7 cm3 / 1/0 7 cm3 /. The pressure p - which must be created for the sample, is equal to 230 mm Hg Below atmospheric / sample. Nesterova /, or 765 - 230 535 mm Hg / P0v765 mmHg /; V is the volume of space at a pressure of 535 mm Hg. will be equal to:

about V / o 765. 7

P1 535 7.6 10.0 / desired volume /. Thus, when creating a vacuum up to 535 mm Hg. the volume of space occupied by the lumen of the channel 13, the vacuum chamber 19, the vacuum cavity 20 and the cylinder 8 in the initial position Л V0 / should be increased from 7 to 10 cm3, i.e. by 3 cm3, which corresponds to b mm on a scale of 22 and reflects the magnitude of the working partial vacuum of 230 mm Hg. The above calculation and graduation of the scale 22 is done once before using it. Rotate the handle I clockwise to set the pressure indicator 9 to the extremely low position corresponding to the atmospheric pressure against the mark on the scale 23.) Then, the base 4 is installed on the skin of the studied area of the human body, for example, on the subclavian region and lightly pressing large and index fingers of the left hand on the supporting platform 22, press it so that the annular retainer 21 and the skin deformer 17 fit snugly against the skin. While holding the device, smoothly turn the handle I of the anti-clockwise arrow until the pressure gauge 9 on the scale 23 is set against the specified working negative pressure in the vacuum chamber 19 on the scale 23. In this case, the threaded pair axis-bracket converts the rotational movement of axis 2 into the translational movement of the cover 7, which raises and stretches the corrugated cylinder 3, and the supporting fuses 10 prevent the cylinder 8 from falling off. There is an increase in the volume in the cylinder 8 and a vacuum is created up to the specified values. This discharge passes through the channel 13, extends to the vacuum chamber 19 and through the holes 18 of the skin deformer 17, has a suction effect on the examined surface of the skin, the latter rises, fills the entire volume of the vacuum cavity 20, is pressed against the skin deformer 17, closes its openings 18 and at this stage, the spread of increasing negative pressure in the vacuum cavity 20 stops / it is from 30 to 50 mm Hg depending on skin turgor. In this case, the annular retainer 21 seals the vacuum system and holds the device in position. The set value of the partial vacuum affects only the skin areas located against the holes 18 of the deformer 17, causing plastic deformation of the examined skin area with testing of blood capillaries for tension, rupture and exit of blood cells with the formation of petechial hemorrhages. Simultaneously with the decrease in pressure and during the study, a visual control of the condition of the skin area being examined is carried out through a magnifying lens 19 After the set time determined by the measurement procedure expires, the vacuum is removed by turning the handle I clockwise and the device is separated from the skin surface, the results are taken into account after 1-3 minutes Evaluation of the results of the study of the resistance of blood capillaries of the skin is as follows: -the absence or appearance of no more than 1-4 petechiae per the negative sample / reaction threshold /; - the appearance of 5-8 petechiae - the first degree of resistance of the sample is positive; -appearance of 9-12 petechiae - the second degree of resistance of the sample is expressed; - the presence of 13-16 petechiae - the third degree of resistance of the sample is sharply positive; - formation of drain hemorrhage - the fourth degree of resistance - pathological test. The proposed meter of resistance of the walls of the capillaries in comparison with the well-known is a portable device:

- 9 Weight / within 80-100 grams / and overall dimensions / 70x50x40 mm /. The design of the device has a minimum number of working units and connections, which provides sufficient sealing, and the build-up of a partial vacuum with the help of a threaded pair eliminates skin injuries due to sharp pressure drops, increases the sensitivity and reliability of the research results and allows the wide use of measurement methods in practical and scientific medicine.

A prototype of the proposed device is made and tested at the RODNMI, the results of testing are contained in the test report.

Claims (1)

RESISTANCE METER FOR CAPILLAR WALLS, comprising a resistance sensor including a housing, a magnifying lens, a skin deformer, a vacuum chamber, an annular retainer, and support platforms, characterized in that it is equipped with a vacuum dispenser comprising a handle connected to a threaded pair, a corrugated cylinder fixed to the base with reference fuses and dial gauge of pressure, and the internal closed object of the corrugated cylinder through the channel communicates with the resistive sensor.