RU2180827C1 - Device for compression-decompression resuscitation - Google Patents

Abstract

FIELD: medicine, in particular, devices for closed chest massage, may be applicable in case of stopping of cardiac activity of a human in different conditions (at home, at work, in ambulance, in hospital, etc.). SUBSTANCE: the device has a supporting platform bearing a vertical rod rigidly secured in the working state, having a scale in the units of length, fixed on the rod is a movable unit for adjustment of the compression and decompression parameters with limiters of excessive excursion, and a movable lever with a sucker positioned on it, and provision is made for an alignment chart for determination of the optimal parameters of compression and decompression in the units of length. The device provides for adjustment of the compression-decompression parameters, i.e. for selection of optimal conditions of action on the thorax that are individual for each patient. The use of the lever makes easier the work of the resuscitator. The device has special units and detachable components, which makes it portable. EFFECT: enhanced convenience in use. 1 dwg

Description

 The invention relates to medicine, namely to devices for closed cardiac massage. It can be used to stop a person’s cardiac activity in various conditions (at home, at work, in an ambulance, in a hospital, etc.).

 Indirect massage of the heart is traditionally carried out without any special devices or devices by the resuscitator himself by pressing his hands on the chest. The results of this massage depend on the qualifications of the resuscitator, and, as a rule, the required blood flow volume cannot be achieved.

 Known device for indoor cardiac massage CardioPump (cardiopump), developed by Ambu International A / S and selected as a prototype. The device comprises a contact element made in the form of a “suction cup”, forming a working chamber upon contact with the patient’s chest. On the bottom of the "suction cup" is mounted a means for transmitting force from the resuscitator to the contact element, and through it to the patient’s chest. The said "suction cup" is made of elastic material, and the means for transmitting force is a rod with a round handle for applying resuscitation force and a calibration scale for visualizing the resulting compression and decompression forces in mass units. (Zilber A.P. Medicine of critical conditions, 1995, book I, pp. 230-238).

 The specified device allows both squeezing the chest by creating pressure in the working chamber when pressure is applied by the weight of the resuscitator, and forcefully expanding by creating a vacuum in the working chamber when resuscitator creates a force directed from the chest, which significantly increases blood flow.

However, this device has the following disadvantages:
- physical load on the resuscitator when performing indirect cardiac massage using the specified device increases by 2-2.5 times compared with standard cardiopulmonary resuscitation;
- dosing of the compression and decompression efforts is carried out in kilograms and does not allow taking into account individual elasticity, age-related fragility of bones, chest size, etc., which does not prevent complications such as fracture of ribs, sternum, injuries of internal organs;
- there is no individual selection of compression and decompression parameters, which makes it impossible to achieve the optimal volume of artificial blood flow for each individual patient.

 The aim of the proposed technical solution is to create a device that increases the effectiveness of closed heart massage, makes it safe for the patient, and also reduces the physical load of the resuscitator.

 This goal is achieved by the fact that the device contains a support platform, placed under the chest of the patient; a bar with a scale applied to it in units of length, which allows determining the anteroposterior size of the chest; movable unit for adjusting parameters with limiters for excursion; lever with a movable contact element-suction cup, as well as a nomogram for determining the optimal parameters of compression and decompression, obtained experimentally.

 The invention is illustrated in the drawing, which presents a General view of the device.

 A device for compression and decompression resuscitation contains a support platform 1, on which there is a vertical rod 2, movable in its lower part and having a cylindrical shape and which can be of any geometric shape. The rod is rigidly fixed in working condition by the hollow cylinder 3 put on this part, and the upper part has faces located at right angles on both sides, on one of which a centimeter scale 4 is applied to determine the anteroposterior size of the patient's chest. A cylindrical polyhedron 5 with a recess 6 is put on the rod, and in the center of the polyhedron 5 there is a latch (not shown), which ensures its fixed attachment to the rod 2 during operation. The polyhedron 5 is fixedly connected to the compression and decompression control unit 7, made, for example, in the form of an oval with slices from two sides forming two parallel sides: the long outer 8 and short inner 9. On block 7 there is a compression adjustment toggle switch 10 with a scale of 11 and decompression adjustment toggle switch 12 with a scale of 13, which are limiters of excursion. On the short side 9 there is a rectangular cutout in which the movable hollow lever 14, which consists of two parts 15 and 16, is movably fixed. The lever can be made both integral or detachable, and of any geometric shape: tetrahedral, oval, round, etc. . The movably fastened part of the lever 15 has at its free end an extension 17 with an internal thread (not shown) for attaching a second half 16, which also has a thread (not shown) at the free narrowed end 18 and a protrusion 19, between which a ring 20 is put on, movably connected to rod 21 and contact element suction cup 22. The free end of the lever 14 ends with a rounded handle 23. There is a nomogram for determining the optimal parameters of compression and decompression 24 in units of length, it can be placed in any part of the device Twa, for example on a supporting platform 1.

 The proposed device for compression and decompression resuscitation works as follows: the device is placed so that the supporting platform 1 is located under the patient’s back. The adjustment unit 7 moves down the rod 2 until the contact of the suction cup contact element 22 with the chest of the resuscitated one, is fixed in this position with the help of a latch (not shown) and the anteroposterior size of the chest is determined on a scale of 4. Using the dials 11 and 13, toggle the compression restriction 10 and decompression 12 toggles using dials 11 and 13, set the corresponding values, which are determined by nomogram 2. A person performing a heart massage with the first compression cycle by applying pressure to the suction cup contact element 22 achieves a suction effect. Together with the force transmitted from the lever 14, chest compression is caused. When moving the lever 14 upwards, together with the contact element-suction cup 22, due to the created vacuum in it, the chest will rise (straighten).

 After the work is completed, the device is disassembled: the adjustment unit 7 is removed from the rod 2 with the lever 14 connected to it, which is untwisted and the suction cup contact element 22 is removed from it. Parts of the device are placed in a case.

 Using the device allows you to adjust the parameters of compression-decompression, which makes it possible to select the optimal efforts of the impact on the chest, individual for each patient, using the nomogram obtained experimentally, and create the desired level of artificial blood flow. Compression and decompression limiters ensure patient safety. Since conducting external massage requires significant efforts from the resuscitator, the use of a lever greatly facilitates the load. The device has special units and removable parts, which makes it portable, convenient to use.

Claims (1)

 A device for compression and decompression resuscitation, consisting of a contact element in the form of a suction cup made of elastic material and a rod for transmitting force, characterized in that a support platform is inserted into it, on which there is a vertical rod rigidly fixed in working condition with a scale applied to it to determine the anteroposterior size of the patient’s chest, a movable compression and decompression unit with an excess excursion limiter fixed on the rod, movably strengthened nny on block adjustment of compression and decompression parameters movable lever disposed thereon and placed on the sucker device nomogram to determine the optimum parameters of the compression and decompression in units of length.