Automatic cpr-device

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment and can be used for cardiac-pulmonary resuscitation due to cyclic compression of a patient's thoracic cage. A device contains the frontal construction with the first and second mobile modules, made with a possibility of travel in opposite directions forward and backward along the frontal construction; a support for a back for placement behind the patient's back, made with a possibility of supporting the frontal construction in a fixed position with respect to the patient's back; a cushion for the thoracic cage; two levers, each of which is connected with a possibility of rotation with the cushion for the thoracic cage with one end and each of which is connected with a possibility of rotation to the respective one of the first and second mobile modules; and drive means, made with a possibility of travel of the first and second mobile modules in opposite directions forward and backward in such a way that the cushion for the thoracic cage cyclically compresses the patient's thoracic cage.

EFFECT: invention makes it possible to reduce energy consumption for resuscitation procedures.

9 cl, 8 dwg

 

The technical field to which the invention relates

The present invention relates to an automatic CPR device for cyclic compression of the thorax of the patient.

The level of technology

Cardiopulmonary resuscitation (CPR) is a well known and important way of first aid. CPR is used to revive people who have suffered from cardiac arrest due to heart attack, electric shock, damage to the chest, and many other reasons. During cardiac arrest, the heart ceases to pump blood, and the person experiencing cardiac arrest, after a short period of time experiencing the disruption of the brain due to insufficient blood supply to the brain. Thus, CPR requires repetitive compressions to compress the heart and the chest cavity to pump the blood through the body. It is widely noted that CPR and chest compressions help save victims of sudden cardiac arrest, particularly if applied immediately after the heart stops.

Indirect heart massage requires that the person performing chest compressions, repeatedly press on the sternum of the victim in the 80-100 compressions per minute. However, when chest compressions are required for a long time, it is difficult, the EU is not impossible, to maintain the proper compression of the heart and rib cage the rib cage. Even experienced doctors can perform proper chest compressions for more than a few minutes.

Because the quality of CPR is very important for the survival of the patient, there is a need for a mechanical, automatic CPR device to replace less reliable and long-term indirect heart massage manually. These devices compress and reduce pressure on the chest of the subject cyclic way. One such automatic CPR device described in EP1915980. The transmission mechanism converts the alternating rotational movement alternately rotating element in a linear reciprocating motion in the intensive care unit. Alternately rotating element delivers rotational energy, for example, from the actuator or hydraulic system. The main disadvantage of EP1915980 is that the drive is not running around the optimal workspace. This is not the most optimal solution for automated CPR device, when power consumption is not optimal due to the error characteristics of the actuator and the chest of the person. Because automatic CPR device should be portable, weight and energy efficiency are important factors. Consider the following :

Th is would be to use the automatic CPR, the chest should snuggle up with a certain desired trapezoidal profile offset. An example of such a profile is illustrated in figure 1. This desired form of signal compression for frequencies in the 90 compressions per minute. The required force needed to obtain the waveform compression in figure 1, is shown in figure 2.

The relationship of the applied force and compression of the thorax of the person shown in figure 3. The first three inches of compression of the rib cage is quite pliable and relatively small force is sufficient. For greater depth of compression of the thoracic cage becomes very hard and the power required increases significantly.

An important aspect of power is periodically repeated acceleration and deceleration of the actuator to obtain the desired profile compression, shown in figure 1. Typically, the actuator must change the rpm from almost zero to approximately 5000 rpm, slow down to 0 rpm and re-accelerate in the opposite direction to 5000 rpm, and then slow down to 0 rpm Large angular acceleration requires a lot of torque and, consequently, high current, and as a smaller moment of inertia. Minimizing the moment of inertia, and the desired angular velocity and acceleration for a particular profile compression pays for itself in reduced power consumption.

First, the let us consider a system with brushless DC drive, excited by the controlled current of the drive with this compatible voltage. The highest number of rpm and torque of the actuator is determined by the maximum voltage and current, respectively. Gear ratio T between the angle of the drive or the drive speed and position X airbags for thorax is assumed constant. When T is small, the drive is running at very high rpm n and has a small torque. Therefore, rapid acceleration airbags for thorax is possible, but big moments and powers can be applied. It is acceptable for a small depth of compression, but at a greater depth compression reactive force and the reactive torque is very large. Therefore, the drive cannot effectively provide the high torque and the required depth of compression is not achieved, while a very large current is consumed; therefore, the operation is inefficient.

For large T, the actuator operates at a low rpm n. Therefore, the acceleration of air bags for thorax is low and high torque and great power can be provided. For high acceleration requires a large voltage drive and the drive is not in the effective area. For optimum efficiency the spine demonstrated the drive should run at approximately 80-85% of their maximum angular velocity. Pulse compression with a short rise time of approximately 100 MS, however, is required for high-quality CPR; hence, the big T is not acceptable.

From the above it is obvious that the correct choice of T is not simple. The necessary compromise between acceleration and the required force; as a result, unregulated drive is not optimal for very nonlinear mechanical pressure on the man. In addition, the optimal T can vary significantly depending on the specific person, because there is a high variability of the properties of the chest depending on the particular person.

The invention

The purpose of this invention is to provide an automatic CPR device that operates in a more optimal workspace, i.e. which is more efficient on energy efficiency.

According to one aspect of the present invention relates to an automatic CPR device for cyclic compression of the thorax of the patient, containing:

the front design with the first and second movable module, configured to move back and forth along the aforementioned frontal structures;

back support for saving the deposits behind the patient, made with the ability to support the frontal structure in a fixed position relative to the back of the patient;

the pillow to the chest;

two levers, each of which is connected to rotate with the pillow to the chest at one end and each of which is connected to rotate with the corresponding one of the first and second mobile modules; and

the tool actuator is configured to, during operation, the drive of the first and second mobile modules back and forth so that the pillow to the chest cyclically compresses the chest of the patient.

There are several advantages CPR device according to the present invention. Starting at the top of the pillow to the chest, vertical offset pads for the chest exceeds the horizontal displacement of the movable modules. It is preferred for the acceleration of the actuator, since a relatively minimal change in the angle drive is required in order to obtain a relatively large movement of air bags for thorax. The compromise is that properly reduces the force in the vertical direction. With the increase in vertical displacement of the pads for the chest, the angle between the two levers is reduced, and as a result, the ratio between the vertical and the mountains of the horizontal offset is reduced, and the ratio between the forces in the vertical and horizontal direction increases. The drive is due to this variable the ratio between the displacement and force as a function of depth compression. At small depths of compression achieved small power and high acceleration, and with a greater depth of compression achieved higher provide power and low acceleration, as desired. Gear ratio thereby is small in the initial phase of compression, and it increases with the depth of compression. Because the ratio varies as a function of depth of compression of continuous method, therefore, can be described as continuously adjustable drive. This drive is the best choice for very nonlinear mechanical pressure on the man, and he simplifies the treatment of people with varying properties of the thorax. Thus, the CPR device operates in more optimal workspace, i.e. it is more efficient on energy efficiency and consumes less power. Consequently, we need a more compact battery, which saves on weight and size of the CPR device according to the invention. This V-shaped configuration of the drive, therefore, meets the needs of the actuator automatic CPR device.

In a preferred embodiment, Khujand the exercise front design automatic CPR device includes a driven threaded spindle, and the above-mentioned first and second mobile modules is configured to be hooked with the threaded spindle so as to move back and forth along the mentioned front design. Using a spindle with thread or helical configuration enables a quick and accurate management of movable modules and, consequently, a pillow for the thorax relative to the thorax of the patient. Thus, rotational movement of the spindle, driven by, for example, the rotational actuator is converted into a translational or linear motion pillow to the chest. This implementation allows moving modules to engage with multiple spindles if necessary.

In another preferred embodiment, the spindle contains two parts with opposite direction to move the first mentioned and second mobile modules in opposite directions. Mainly can be used one spindle having two parts with opposite threads so that the drive spindle rotation in one direction moves the movable modules to each other, and driving the rotation in the opposite direction moves them from each other. Accordingly, the pillow to the chest compresses and reduces the pressure on the breast CL the weave of the patient. The use of only one spindle provides savings in weight and cost, allows to obtain a simple design with only one drive, leading one spindle, and this simplifies the synchronous movement of the two levers and thereby symmetric required to move air bags for thorax relative to the thorax of the patient.

In another preferred embodiment, the front design of the automatic CPR device includes a belt system with a belt and a pulley, and the belt is made with the ability to operate and turn around the pulley, and said first and second movable modules are connected with the said belt so as to move back and forth along the mentioned front design. Mainly the system with a belt drive is cheaper, has less friction and creates less mechanical noise than the configuration with the spindle. Less friction results in less heat and less power consumption; therefore, they require less battery power and more compact means of the drive or the drive.

In addition, the exclusion of the spindle and movable module with the screw engagement also results in less weight and very compact height of the overall design, with a lower center of gravity.

In another preferred is the embodiment, the belt drive system includes one pulley to wrap the belt around him, and belt system goes along the front design and the above-mentioned first and second mobile modules made with a possibility to be connected to respective, mutually exclusive side of the belt system to move in opposite directions relative to each other. Mainly driving the rotation of the belt in one direction pushes the movable modules to each other, and driving the rotation in the opposite direction moves them from each other. Accordingly, the pillow to the chest compresses and reduces the pressure on the thorax of the patient.

In other preferred embodiments, the implementation of chain and sprocket are used instead of a belt and pulley, as described in the previous two variants of implementation. This has the advantage of durability and rigidity. It also prevents sliding of the chain relative to the sprocket, thereby providing a low response time and accuracy.

In another preferred embodiment, the front design provides a rigid means for directing the first and second mobile modules back and forth along the front of the structure. Due to a bit more flexible design of the belt drive system than in the configuration of the spindle, it may be useful to use, for example, some guides for direction p. the motion of movable modules.

In another preferred embodiment, the tool actuator selected from the group consisting of electromagnetic, pneumatic or hydraulic drive, which provides a rotational force or a linear force. The present invention mainly uses a rotary or linear motion and converts it into translational or linear motion pillow to the chest in the direction of the chest. One advantage of using an electromagnetic actuator and, in particular, actuator, which is servo-assisted, is that the optimal pulse strength is obtained for the desired form of signal compression, i.e. the power is personalized for a particular patient and properties of his body/chest.

Other automatic CPR device is LUCAS machine described in US 2004/0230140. This device includes a compressor unit with pneumatic drive, which reciprocating causes the contact pad of the chest to mechanically compress/reduce the pressure on the chest of the subject. The subject is at rest in the supine position during the execution of the CPR. The compressor is mechanically supported vertically above the chest of the patient so that pin cushion is in mechanical contact with the GRU is Noah cage of the patient in the area of the sternum. In favour of the present invention demonstrated that it provides better controlled depth of compression, i.e. it provides a more personalized compressive force is more stable and secure due to lower weight and lower center of gravity, has longer service life due to greater efficiency in energy efficiency and lower acoustic noise.

Brief description of drawings

Embodiments of the invention described hereinafter referred to only as an example with reference to the drawings, of which:

figure 1 depicts a diagram of the desired waveform compression;

figure 2 depicts a diagram of the power required to obtain a waveform compression figure 1;

figure 3 depicts a diagram of the forces of elasticity depending on the depth of compression for the average person;

figure 4 depicts a schematic front view of the automatic CPR device according to a variant implementation of the present invention;

figure 5 depicts a General front view of the automatic CPR device according to a variant implementation of the present invention;

6 depicts a schematic front views of three stages automatic CPR device according to a variant implementation of the present invention;

7 depicts a diagram of the simulated power system with two different CNAME actuators;

Fig depicts a schematic view of the belt system automatic CPR device with a belt drive according to a variant implementation of the present invention.

Detailed description of embodiments of the invention

Figure 4 shows a schematic drawing of the automatic CPR device for cyclic compression of the thorax of the patient. CPR device comprises a support 41 for the back for placement behind the patient. Two vertical posts 42a, b are attached in the lower part to the support 41 for the back. Front design 43 is connected with the upright supports 42a, b in the upper part. Bearing 41 for the back is made with the ability to support the frontal structure 43 in a fixed position or in a relatively fixed position relative to the back of the patient. Without the support 41 for the back all CPR device has a tendency to move away from the chest of the patient during operation. Frontal structure 43 includes first and second mobile modules 44a, b, is made with the ability to move back and forth along the mentioned front design 43. CPR device further comprises a cushion 46 to the chest, which is made with a possibility to come into contact with and compress/reduce the pressure on the chest of the patient. Cushion 46 to the chest can contain or can be made with the prob is the possibility to distribute the force on the chest, the adhesive layer can be applied on the cushion 46 to the chest to provide the best mount to the chest of the patient. Two lever 45a, b are connected to rotate with the cushion 46 to the chest one end, and each arm is connected to rotate with the corresponding one of the first and second mobile modules 44a, b. Two lever 45a, b can be connected to rotate or swivel cushion 46 to the chest or at specific points cushion 46 to the chest, or preferably at a point having a common rotational or swivel axis. CPR device further comprises means 47, 48 of the actuator (51, 52 figure 5)which has a capability when the drive of the first and second mobile modules 44a, b back and forth so that the cushion 46 to the chest cyclically compresses the chest of the patient. The tool actuator preferably comprises an electromagnetic actuator 48 or, more specifically, (dis-)brush DC drive, which provides a rotational force, however, pneumatic or hydraulic means may also be arranged to provide the required movement of the modules 44a, b. The actuator 48 is preferably substantially control. The battery supplies power to the actuator 48. The actuator 48 is configured to rotate the pinion gear is th wheel or pulley 47, which, in turn, causes the spindle or shaft 51, 52. Two lever 45a, b can be connected via ball screws with reduced friction with the spindle. Preferably the spindle is divided into two parts 51, 52 with the opposite direction. When the actuator 48 is rotated, for example clockwise, the movable modules 44a, b and levers 45a, b are moved inward, and when the actuator 48 is rotated counterclockwise, the movable modules 44a, b and levers 45a, b are moved outward.

Figure 6 shows the front views of three stages automatic CPR device. In the ready position of the first and second mobile modules 44a, b are placed on the outer parts of the frontal structure 43, and therefore the pillow to the chest is in the top position. The patient may be placed back to the support 41 for the back and front part of the body is located opposite the front design 43. The actuator 48 starts the rotation of the spindle 51, 52, the first and second mobile modules 44a, b and levers 45a, b thus are together, and, therefore, the cushion 46 to the chest moves in the direction of the patient as long as the pillow is not in contact with the chest, thus reaching the initial position. The angle between the two levers is approximately 140 degrees. Pillow to the chest then moves between the initial replication is m and the end position, respectively. The actuator 48 is further rotated counterclockwise, move completely changes its direction to the opposite, and again reached the initial position. Thus, the cushion 46 to the chest cyclically compresses the chest of the patient. The rotational movement of the actuator 48 is thereby converted into a translational movement of the cushion 46 to the chest.

Typical desired depth of compression is 4-6 inches, and the required power can be 800 N. Calculations show that the conversion of rotational movement of the actuator in the forward movement can provide approximately 1000 N. 7 shows the simulated power consumption of the system for two different drives, one for the drive with a V-shaped levers according to the present invention and one for the drive with optimal constant ratio to 1.67. Modeling was conducted on the experimental data of the test system, and they are consistent within 10% of experimental values. For both cases the drive parameters, as well as PID control is optimized for minimum power. It is obvious that the device with an adjustable actuator according to the present invention has a significantly lower power consumption, approximately 30-40% lower power consumption for depth compression of 4-5 cm, when it is all the other factors are the same. Additional advantages of the system lie in the symmetry of the CPR device that ensures the movement only in a vertical direction and which also distributes the force along the levers Century

On Fig shows a schematic view of the belt system automatic CPR device with a belt drive according to a variant implementation of the present invention. Referring to the upper drawing, the drive and gear train (not shown) lead one of the pulleys 82a in the direction 84 in a clockwise direction. One lever 45a is connected with the first movable module 83a, which is connected with a strap on one side 81a of the belt drive system and thereby moves to the right. The other arm 45b is connected with the second movable module 83b, which is connected with a strap on the other side 81b of the belt drive system and thereby moves to the left. Therefore, the cushion 46 to the chest moves down in the direction of the patient. Referring to the lower drawing, the change in the opposite direction 85 of rotation of the actuator causes the levers 45a, b and cushion 46 to the chest move in opposite directions. Preferably the belt system is made so that the pulleys rotate horizontally, i.e. in a plane parallel to the back of the patient. However, the belt system can also be made so that the pulleys rotate vertically, i.e. in the plane perpendicular to the back of the patient and along the front stretch design 43. In this case, one of the levers 45a, b has a greater length than the other arm. The belt is preferably made of polymer material. The present invention preferably uses a cogged or synchronous belt and pulley. The belt is evenly spaced transverse teeth, which are included into the matching slots on the periphery of the pulley.

For a chain system the principle of operation is similar to the previous variant implementation differs in that the pulley and the belt is replaced by a sprocket and chain, respectively.

Certain specific details of the disclosed variant of implementation set forth for purposes of explanation and not limitation, in order to provide a clear and comprehensive understanding of the present invention. However, specialists in the art should understand that the present invention can be used in practice in other variants of implementation, which does not correspond exactly to the details set forth in this document, without significant deviations from the essence and scope of this disclosure. For example, the present invention is not limited to requiring CPR device with only two levers, two movable modules, two pulleys or two stars. Additionally, in this context, and for purposes of brevity and clarity, detailed descriptions of the good is known devices schemes and technologies omitted in order to avoid unnecessary details and avoid possible confusion.

1. Automatic device for cardiopulmonary resuscitation, providing cyclic compression of the thorax of a patient, comprising:
the front design with the first and second movable module, configured to move in opposite directions forward and backward along the front design;
back support for placement behind the patient, is arranged to maintain the frontal structure in a fixed position relative to the back of the patient;
the pillow to the chest;
two levers, each of which is connected to rotate with the pillow to the chest at one end and each of which is connected to rotate with the corresponding one of the first and second mobile modules; and
the tool actuator configured to move the first and second mobile modules in opposite directions forward and backward so that the pillow to the chest cyclically compresses the chest of the patient.

2. Automatic device according to claim 1, in which the front design includes a driven threaded spindle, and the first and second mobile modules is configured to be hooked with the threaded spindle, so that in order to move forward and backward along the front of the structure.

3. Automatic device according to claim 2, in which the spindle contains two parts with opposite direction to move the first and second mobile modules in opposite directions.

4. Automatic device according to claim 1, in which the front design includes a belt system with a belt and a pulley, and the belt is made with the ability to operate and turn around the pulley, and the first and second mobile modules are connected with the belt so as to move forward and backward along the front of the structure.

5. Automatic device according to claim 4, in which the belt system includes one pulley to wrap the belt around him, and belt-drive system runs along the front of the structure, and the first and second mobile modules made with links to the respective, mutually exclusive side of the belt system to move in opposite directions relative to each other.

6. Automatic device according to claim 1, in which the front design includes a chain system containing the chain and the sprocket, and the chain is configured to be driven and turn around the sprocket, and the first and second mobile modules are connected with a chain so as to move forward and backward along the front of the structure.

7. Auto the e device according to claim 6, which chain contains one asterisk to wrap the chain around it, and the chain system runs along the front of the structure, and the first and second mobile modules made with links to the respective, mutually exclusive side chain of the system so as to move in opposite directions relative to each other.

8. Automatic device according to claim 4, in which the front design provides a rigid means for directing the first and second mobile modules forward and backward along the front of the structure.

9. The automatic device of claim 1, wherein the tool actuator is selected from the group consisting of electromagnetic, pneumatic or hydraulic drive, which provides a rotational force.



 

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3 ex

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2 cl

FIELD: medicine.

SUBSTANCE: method involves setting respirator operation parameter values taking into account height h, age a and patient body mass m; proper value of thoracic pulmonary extensibility Cprop is determined with patient body mass taken into account. Positive pressure at the end of expiration as forced ventilation characteristic with thoracic pulmonary extensibility taken into account. Then, forced volume-controlled artificial pulmonary ventilation is carried out. Breathing frequency and inhaled volume are adjusted to achieve normal lung ventilation followed by auxiliary lung ventilation.

EFFECT: reduced negative influence upon lungs, systemic and cerebral hemodynamic characteristics; retained pulmonary gas exchange.

4 cl, 3 dwg

FIELD: medicine, resuscitation, intensive therapy.

SUBSTANCE: a patient should be placed onto a flat inflexible surface to put his either right or left hand bent in elbow joint onto thorax followed by energetic pressing with a rescuer's palms, moreover, one of the palms should be placed into area of elbow joint and another - into area of patient's wrist. The present innovation helps to restore respiration and circulation in shortest terms, respiration - due to efficient diaphragmatic movement that enables to remove air out of patient's lungs and open a vocal fissure, and circulation - due to intensive inflow of blood into the main vessels and increased pressure in thorax.

EFFECT: higher efficiency.

FIELD: medicine, cardio-pulmonary resuscitation.

SUBSTANCE: one should strike a blow for the 2nd intercostal area right-hand against patient's sternum. The present innovation enables to restore rhythmic contractions of cardiac muscle due to inducing mechanical energy with a pacemaker followed by transforming it into electric energy.

EFFECT: higher efficiency.

2 ex

FIELD: medicine; medical engineering.

SUBSTANCE: method involves applying claimed device for measuring cardiac rhythm step-by-step. Pressure pulsation is created in peripheral vascular system synchronized with cardiac rhythm at given cardiac cycle moment in counterpulsation mode. At least one input system parameter exciting pressure pulsation is changed to achieve optimized reduction at least heart beat rate or systolic pressure and to obtain resulting heart load reduction in this way. The heart load is considered to be functionally dependent on heart beat rate and systolic blood pressure.

EFFECT: enhanced effectiveness in relieving heart load; high safety level.

39 cl, 19 dwg

FIELD: medicine.

SUBSTANCE: method involves increasing respiration minute volume after applying carbodioxyperitoneum in a way that CO2 concentration is to be within 32-38 mm of mercury column and remaining at this level during the carbodioxyperitoneum treatment course. The CO2 concentration is supported at 30-32 mm of mercury column for 5-10 min after canceling the carbodioxyperitoneum with following respiration minute volume reduction until CO2 concentration reaches normal values.

EFFECT: reduced frequency of postoperative nausea and vomiting attacks.

1 dwg, 4 tbl

FIELD: medicine, cardiology, medicinal equipment.

SUBSTANCE: the present innovation refers to the devices for correcting human functional state and could be applied for normalizing cardiac activity, autonomic unbalance, optimizing a reflecting and coordinating functions of central nervous system during the process of adaptation to natural and professionally-induced extreme factors and, also, in complex therapy of cardiovascular and psychosomatic diseases. The device has got a unit for registering the rhythm of inferior limbs' locomotions with possibility of generating monopolar rectangular impulses modulated in the rhythm of inferior limb's locomotions at rearranged carrying frequency; a unit for registering the rhythm of cardiac contractions at possibility for generating monopolar rectangular impulses modulated in the rhythm of automatically detected R wave at rearranged carrying frequency, a commutator and switches at normally opened wrenches that provides the chance for multi-variant connection of two head telephones at separate supply and glasses with protective light filters and with light diodes of different color and separate supply, the regulators of sound power and brightness degree of light diodes designed with the chance for individual independent matching the intensity of sound and/or light signals according to the criterion of the comfort of subjective perception - all being on internal surface of each glass. The innovation provides widened functional capacities and area of application of the device suggested, its simplified exploitation, decreased price and easiness of procedures fulfilled with its help.

EFFECT: higher efficiency.

7 dwg, 3 ex, 1 tbl

FIELD: medicine.

SUBSTANCE: it is necessary to carry out 5-7 courses of complex rehabilitation per 100 trainings/each. Moreover, complex rehabilitation consists of 3 types of trainings. During trainings on social-vocal rehabilitation it is necessary to form fluent and rhythmic speech through deep release of vocal brake and dosed loading upon auditory perception increased from training to training, through pronunciation and psychoemotional sphere. So, at first, it is necessary to activate the brain due to stimulating auditory and vocal areas. During trainings on adaptive-physical rehabilitation it is important to carry out deep muscular pull. The main part of trainings should be supplemented with performing gymnastic exercise known as "piked seat" in static isometric mode. While performing the exercise a patient should achieve the position "legs together, breast - on legs", when the angle formed by a patient's back and legs corresponds to 0. While performing this exercise a patient's back should be additionally affected with external loading as either pressing with a trainer's hands or putting a load onto a patient's back. During trainings on psychological-pedagogical rehabilitation it is necessary to elaborate stress resistance due to multiple repetition of stress loadings being increased from training to training and their psychocorrection. The innovation enables to provide stable effect of recovery at complete absence of disease regress and under condition of excluding medicinal therapy from the course of therapy.

EFFECT: higher efficiency of therapy.

7 cl, 1 ex

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