CPR device piston cover

Abstract

A cover that fits onto a piston 310 for compressing a patient's chest provided in a cardiopulmonary resuscitation device according to an embodiment of the present invention. The cover has a pair of grooves 6024a, 6024b formed between a first piston fitting portion 611a and a second piston fitting portion 611b that form a piston fitting port 6110, and between a third piston fitting portion 611c and a fourth piston fitting portion 611d. When the piston 310 is fitted into the piston fitting port 6110, the pair of grooves 6024a, 6024b includes a first pad upper portion 610 composed of a piston fitting portion 611 into which a fastening member formed on a part of the outer peripheral surface of the piston 310 is drawn, and a first pad lower portion 620 that generates a negative pressure and compresses the chest compression point of the patient on the lower surface when the piston 310 is expanded, and when the piston 310 is contracted, pulls the patient's chest on the lower surface with the negative pressure and moves it upward. A first pad 600 is integrally formed. A protruding member 720 is provided so as to fit into the first pad lower portion 620, and a first plate 700 that fits into the first pad lower portion 620 and forms a gap space (A) is included.

Description

[Technical Field]

[0001] The present invention relates to a piston cover for a cardiopulmonary resuscitation device, and more particularly to a piston cover for a cardiopulmonary resuscitation device that can continuously provide a cushioning effect to relieve and distribute pressure acting on a patient's chest during first aid treatment. [Background technology]

[0002] Various types of cardiopulmonary resuscitation (CPR) devices are known in the prior art. One such device is powered by compressed air or breathing gas (Lucas™, Jolife AB, Lund, Sweden). A unique advantage of such CPR devices is their light weight and portability. Another advantage is the elastic nature of compressed air, which allows gas-powered CPR devices to cause less trauma to the patient's chest than devices with rigid compression means. Known devices can be used as first aid equipment in life-saving situations. Furthermore, known devices can be supplied with driving gas from a hospital air supply line, which is suitable for uninterrupted CPR shocks when the patient is admitted to hospital.

[0003] However, even if the elastic properties of compressed air are utilized, the compression means itself is hard, so when compressing the patient's chest, strong pressure is applied to the patient's chest, which can lead to rib fractures and hemothorax during CPR. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a piston cover for a cardiopulmonary resuscitation device that can continuously provide a cushioning effect to relieve and distribute the pressure acting on the patient's chest during chest compressions, thereby improving on conventional compression means.

[0005] However, the technical problems to be achieved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the following description. [Means for solving the problem]

[0006] In order to achieve the above object, a cover is provided in a cardiopulmonary resuscitation apparatus according to one aspect of the present invention, which is fitted to a piston 310 for compressing a patient's chest. The cover has a pair of grooves 6024a, 6024b formed between a first piston fitting portion 611a and a second piston fitting portion 611b, which form a piston fitting opening 6110, and between a third piston fitting portion 611c and a fourth piston fitting portion 611d. When the piston 310 is fitted into the piston fitting opening 6110, the pair of grooves 6024a, 6024b are fitted to the outer peripheral surface of the piston 310. The first pad 600 is integrally formed with a first pad upper part 610 having a piston fitting part 611 into which a fastening member formed on a part thereof is retracted, and a first pad lower part 620 that compresses the chest compression points of the patient on its lower surface while generating negative pressure when the piston 310 is expanded, and pulls the patient's chest on its lower surface by the negative pressure and moves it upward when the piston 310 is contracted; and a first plate 700 having a protruding member 720 that is fitted into the first pad lower part 620 to form a gap space (A).

[0007] Also, according to another aspect of the present invention, there is provided a cover fitted to a piston 310 for compressing the chest of a patient, which is provided in a cardiopulmonary resuscitation device, and the cover has a pair of grooves 8024a, 8024b formed between a first piston fitting portion 811a and a second piston fitting portion 811b, which form a piston fitting opening 8110, and between a third piston fitting portion 811c and a fourth piston fitting portion 811d, and when the piston 310 is fitted into the piston fitting opening 8110, fastening members formed on a part of the outer circumferential surface of the piston 310 are drawn into the pair of grooves 8024a, 8024b. and a second pad 800 integrally formed with a second pad upper part 810 consisting of a piston fitting part 811 fitted into the second pad upper part 810, and a second pad lower part 820 that, when the piston 310 is expanded, generates negative pressure and compresses the chest compression points of the patient on its lower surface, and when the piston 310 is contracted, pulls the patient's chest on its lower surface by the negative pressure and moves it upward; and a second plate 900 that is provided with a first protruding member 920 and a second protruding member 930 to be fitted into the second pad lower part 820 and is fitted into the second pad lower part 820 to form gap spaces (A, B). [Effects of the Invention]

[0008] The cover of the present invention continuously provides a cushioning effect to the patient that relieves and distributes the pressure acting on the patient's chest during chest compressions, thereby preventing rib fractures and hemothorax from occurring during chest compressions.

[0009] However, the effects obtained by the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those having ordinary skill in the art to which the present invention pertains from the following description. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a cardiopulmonary resuscitation apparatus according to one embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the cardiopulmonary resuscitation device in FIG. [Figure 3]FIG. 3 is a perspective view of a first pad constituting a cover according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 5 is a perspective view of the lower part of the first pad included in the region B in FIG. [Figure 6] FIG. 6 is a plan view of the lower part of the first pad included in the region B in FIG. [Figure 7] FIG. 7 is a perspective view of a second pad constituting a cover according to another embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view taken along line CC in FIG. [Figure 9] FIG. 9 is a perspective view of the lower part of the second pad included in the region D in FIG. [Figure 10] FIG. 10 is a plan view of the lower part of the second pad included in region D in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art to which the present invention pertains can easily carry out the description. However, since the description of the present invention is merely an embodiment for the purpose of structural and functional description, the scope of the present invention should not be interpreted as being limited by the embodiments described herein. In other words, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents that can realize the technical idea. Furthermore, the objectives or effects presented in the present invention do not mean that a particular embodiment should include all of these or only these effects, and the scope of the present invention should not be understood as being limited thereby.

[0012] The meanings of the terms in the present invention are understood as follows.

[0013] Terms such as "first" and "second" are used to distinguish one component from another and should not be used to limit the scope of rights. For example, a first component can be called a second component, and similarly, a second component can be called a first component. A component being "connected" to another component should be understood to mean that it can be directly connected to the other component, but that there may be other components between them. Conversely, a component being "directly connected" to another component should be understood to mean that there are no other components between them. Meanwhile, other expressions describing the relationship between components, such as "between" and "immediately between," or "adjacent to" and "directly adjacent to," should be interpreted similarly.

[0014] The singular includes the plural unless the context clearly dictates otherwise. Furthermore, it should be understood that terms such as "comprise" or "have" are intended to specify the presence of stated features, numbers, steps, operations, components, parts, or combinations thereof, but do not exclude the possible presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0015] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as meanings consistent with the context of the relevant art, and cannot be interpreted as having ideal or overly formal meanings unless explicitly defined in this invention.

[0016] FIG. 1 is a perspective view of a cardiopulmonary resuscitation apparatus according to one embodiment of the present invention, and FIG. 2 is a schematic view of the cardiopulmonary resuscitation apparatus in FIG.

[0017] As shown in FIGS. 1 and 2, the cardiopulmonary resuscitation device of the present invention includes a support plate 100 for chest compression of a patient, a support base 200, and a hood 300.

[0018] The support plate 100 is shaped to support the back of a patient who needs cardiopulmonary resuscitation, and is provided with a sliding guide 110 for sliding the support base 200 and the hood 300, and a stopper 120 for fixing the positions of the support base 200 and the hood 300.

[0019] The support plate 100 has an internal space formed at its side into which a frame 115 provided on a sliding guide 110 can be retracted in order to adjust the height of the piston 310 .

[0020] The sliding guides 110 are provided on both edges of the support plate 100 and are slidably coupled to one end and the other end of the support table 200, allowing the support table 200 to slide forward or backward.

[0021] As shown in Figure 2(b), which is an enlarged view of area A in Figure 2(a), the sliding guide 110 is provided with a frame 115 that is retracted into or pulled out from the inside of the support plate 100, thereby adjusting the distance between both ends of the support base 200 and thereby adjusting the height of the piston 310.

[0022] The height of the piston 310 can be adjusted to prevent situations where the piston 310 cannot compress the chest compression points of a particular patient, since each patient has a different body shape.

[0023] The stopper 120 is provided on the sliding guide 110 and has a shape that can be fastened to one end and the other end of the support base 200, and by fastening to one end and the other end of the support base 200, the positions of the support base 200 and the hood 300 are fixed.

[0024] The support base 200 is coupled to a sliding guide 110 so that the lower end of the piston 310 moves to a position where it compresses the chest of the patient, and in one embodiment of the present invention, the shape for supporting the hood 300 is arch-shaped, but is not limited to this.

[0025] The support base 200 has one end and the other end movably connected to a pair of sliding guides 110, so that it can slide forward or backward around the sliding guides 110 as an axis, or the distance between the two ends can be adjusted by retracting and pulling out the frame 115.

[0026] The forward and backward sliding of the support base 200 and the adjustment of the distance between both ends are preferably performed before the piston 310 compresses the patient's chest, and when the piston 310 moves to a position for compressing and relaxing the patient's chest, one end of the support base 200 is fastened by a pair of stoppers 120.

[0027] The support base 200 has a shape such that one end and the other end can be attached and detached from a pair of sliding guides 110, and is detachable from the pair of sliding guides 110. By attaching and detaching, the support base 200 can be detached from the support plate 100 together with the hood 300 and used as a separate device.

[0028] The hood 300 is connected to one side of the support base 200, more specifically, to the center (arch crown) of the arch-shaped support base 200, and has a piston 310 for compressing the chest of the patient and a control unit 320 for contracting or expanding the piston 310.

[0029] The hood 300 may have the control unit 320 exposed to the outside or installed inside.

[0030] The piston 310 is separated from the patient's chest before compressing the patient's chest, and is operated by the control unit 320 to repeat the process of compressing the patient's chest, then separating, and relaxing the patient's chest.

[0031] The piston 310 can be operated based on a continuous compression mode in which compression points on the patient's chest are continuously compressed, or a 30:2 compression mode in which two artificial respirations are performed after 30 chest compressions, thereby providing chest compression-based first aid to the patient.

[0032] The control unit 320 can control the operation of the CPR device as well as the operation of the piston 310, and can be provided with a number of buttons for this purpose.

[0033] Although not shown, the plurality of buttons may include, as specific examples, a power button for turning the power of the cardiopulmonary resuscitation device on / off, a stop button for stopping the operation of the piston 310, a compression mode setting button for determining whether the piston 310 performs chest compressions (CPR) on the patient or for setting the chest compression mode of the piston 310, a compression depth setting button for setting the chest compression depth of the piston 310, and a compression speed setting button for setting the chest compression speed (number of times) of the piston 310.

[0034] When an input signal is input to the power button and the cardiopulmonary resuscitation device is turned on, the control unit 320 initializes the settings and performs a self-test to determine whether the device is operating normally. If the cardiopulmonary resuscitation device is on, when an input signal is input to the power button again, the control unit 320 initializes the settings and turns off the power of the cardiopulmonary resuscitation device.

[0035] When the chest compression mode set by the compression mode setting button is the continuous compression mode, the control unit 320 controls the operation of the piston 310 to repeatedly compress and relax the patient's chest. Conversely, when the chest compression mode set by the compression mode setting button is the 30:2 compression mode, the control unit 320 can control the operation of the piston 310 to perform two artificial respirations after compressing the patient's chest 30 times.

[0036] The control unit 320 can control the operation of the piston 310 so that, when an input signal is input to the compression depth setting button, the patient's chest is compressed to at least one depth of 4 cm, 4.5 cm, 5 cm, or 5.5 cm; and can further control the operation of the piston 310 so that, when an input signal is input to the compression depth setting button in an initialization state, the patient's chest is compressed to 5 cm, when a subsequent signal is input, the patient's chest is compressed to 5.5 cm, when another signal is input, the patient's chest is compressed to 4 cm, and when a further signal is input, the patient's chest is compressed to 4.5 cm.

[0037] The control unit 320 can control the operation of the piston 310 so that when an input signal is input to the compression speed setting button, the patient's chest is compressed at least one of 100 times, 110 times, and 120 times; and further, can control the operation of the piston 310 so that when an input signal is input to the compression speed setting button in an initialized state, the patient's chest is compressed 110 times; when another signal is input, the patient's chest is compressed 120 times; and when a further signal is input, the patient's chest is compressed 100 times.

[0038] Such a cardiopulmonary resuscitation device may be provided with a cover that is attached to the lower end of the piston 310 and is made of a material with a different hardness from the hard material of the piston 310, and that can continuously provide a cushioning effect to relieve and distribute pressure acting on the patient's chest.

[0039] As shown in Figures 3 to 6, the cover according to one embodiment of the present invention includes a first pad 600 into which the lower end of the piston 310 is fitted to directly compress the patient's chest, and a first plate 700 fitted into the first pad 600 and disposed inside the first pad 600 so as to form a gap space (A).

[0040] FIG. 3 is an oblique view of a first pad constituting a cover according to one embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is an oblique view of the lower part of the first pad included in area B in FIG. 4, and FIG. 6 is a plan view of the lower part of the first pad included in area B in FIG. 4.

[0041] As shown in FIGS. 3 to 6, the first pad 600 has an outer shape including a first pad upper part 610 into which the lower end of the piston 310 is fitted, and a first pad lower part 620 on the underside for compressing the patient's chest, and the first pad upper part 610 may have a piston fitting part 611 formed thereon.

[0042] The first pad upper part 610 forms a piston fitting opening 6110 by a piston fitting part 611 integrally formed in a bent shape from the first pad lower part 620, and the piston 310 can be fastened to the first pad upper part 610 when the lower end thereof contacts the first plate 700 and a fastening member (not shown) formed on a part of the outer circumferential surface is drawn into the piston fitting opening 6110 by rotation of the cover.

[0043] The piston fitting portion 611 forms a piston fitting opening 6110, and the piston 310 has its lower end fitted into the first pad upper portion 610 through the piston fitting opening 6110.

[0044] In addition, the piston fitting portion 611 is a portion that is bent and formed from the first pad upper portion 610 to form a piston fitting opening 6110 into which the piston 310 can be retracted, and includes a first piston fitting portion 611a, a second piston fitting portion 611b, a third piston fitting portion 611c, and a fourth piston fitting portion 611d.

[0045] In addition, a pair of grooves 6024a, 6024b are formed in the piston fitting portion 611 between the first piston fitting portion 611a and the second piston fitting portion 611b and between the third piston fitting portion 611c and the fourth piston fitting portion 611d, and when the piston 310 is fitted into the piston fitting port 6110, a fastening member formed on a part of the outer surface of the piston 310 is pulled into the pair of grooves 6024a, 6024b.

[0046] That is, the piston 310 can be fastened to the first pad 600 by contacting the lower end of the piston 310 with the first plate 700 and the fastening member being drawn into the pair of grooves 6024a and 6024b.

[0047] In addition, during the process of engagement and disengagement between the fastening member of the piston 310 and the pair of grooves 6024a, 6024b, the lower part of the piston fitting portion 611 expands (or flows) outward from the first pad upper part 610 so that the fastening member of the piston 310 is retracted or pulled out from the pair of grooves 6024a, 6024b, and therefore an expansion space 6101 can be formed in the gap space with the first pad upper part 610.

[0048] The first pad upper portion 610 may be made of at least one of polyurethane, polypropylene, and biocompatible silicone, which are high-hardness materials, so that the contraction and expansion of the piston 310 and the corresponding force can be transmitted to the cover regardless of various external forces applied from the outside.

[0049] In addition, the first pad upper portion 610 has a Shore A hardness of 40 to 60 if made of biocompatible silicone, and an Asker C hardness of 25 to 30 if made of other materials. In one embodiment of the present invention, the Asker C hardness can be measured using an Asker hardness tester, which measures the hardness based on the depth to which the indenter of a predetermined shape is pressed into the surface of a sample using a spring force to deform the surface and measure the hardness when the resistance of the sample and the spring force are balanced. Shore hardness can be measured by measuring the height of the bounce when a dropping object with a small diamond attached to its end is dropped from a certain height.

[0050] The first pad lower part 620 is the area B in FIG. 4 and is integrally formed with the first pad upper part 610, and when the piston 310 is expanded toward the patient's chest, it can come into direct contact with the patient's chest compression points and compress the patient's chest.

[0051] The first pad lower portion 620 is formed as a housing 621 , and the housing 621 includes a plurality of air flow holes 623 and a seat 624 .

[0052] The housing 621 is composed of an outer housing 621a and an inner housing 621b which are integrally formed, and the lower surface thereof comes into contact with the chest of the patient.

[0053] In addition, the housing 621 has a protruding member insertion opening 622 formed at the boundary between the outer housing 621a and the inner housing 621b, into which the protruding member 720 provided on the first plate 700 can be fitted.

[0054] The protruding member insertion opening 622 is circular and formed at the boundary between the outer housing 621a and the inner housing 621b so that the protruding member 720 can be fitted therein.

[0055] The outer housing 621a and the inner housing 621b may be embodied in a bellows shape so that the volume of the gap space (A) can be changed.

[0056] Furthermore, the upper portions of the outer housing 621a and the inner housing 621b are fitted to the bottom 710 of the first plate 700, and the upper portions of the outer housing 621a and the inner housing 621b may be provided with (or coated with) an adhesive means (e.g., adhesive) so as to maintain the fitting structure between the first pad 600 and the first plate 700. However, the adhesive means is not limited to being provided on the upper portions of the outer housing 621a and the inner housing 621b, and may also be provided on the bottom 710.

[0057] In addition, the outer housing 621a and the inner housing 621b have side walls that form the protruding member insertion opening 622 that protrude upward, so that a gap space (A) is created between the inner housing 621b and the first plate 700 in the fitting structure of the first pad 600 and the first plate 700.

[0058] The inner housing 621b has a plurality of air flow holes 623 formed on the lower surface thereof so that when pressure is transmitted from the patient's chest to the lower surface during chest compression, a volume change occurs due to air flow in the gap space (A).

[0059] The volume of the gap space (A) between the upper side of the inner housing 621b and the first plate 700 may decrease when air flows out along the air flow port 623 due to the piston 310 expanding during the chest compression process of the patient, and conversely, when the compression of the patient's chest is completed and the first plate 700 is separated from the patient's chest, the volume may increase due to the air flowing in through the air flow port 623.

[0060] When the lower surface of the inner housing 621b comes into contact with the patient's chest during chest compression, and as the piston 310 expands, air flows out from the gap space (A) to the outside, reducing the volume of the gap space (A). When the seat 624 provided in the gap space (A) comes into contact with the bottom 710 of the first plate 700, negative pressure is generated in the gap space (A). After the negative pressure is generated in the gap space (A), when the piston 310 contracts, the lower surface in contact with the chest compression point of the patient can move upward, pulling the patient's chest.

[0061] The first pad lower portion 620 is made of at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, polyurethane, and biocompatible silicone, and can be embodied as a foam that conforms to the shape of the patient's chest due to the properties of such materials.

[0062] Furthermore, in the first pad lower portion 620, the biocompatible silicone may have a Shore A hardness of 10 to 30, and the other materials may have an Asker C hardness of 10 to 20.

[0063] Meanwhile, when compressing the patient's chest, the first pad lower part 620 needs to conform to the patient's chest. For this reason, the lower surface of the inner housing 621b, which comes into contact with the compression points of the patient's chest, is preferably made of biocompatible silicone, which is easily conformable to the patient's chest, among applicable materials. This continuously provides a buffering effect that relieves and distributes the pressure acting on the patient's chest, thereby preventing rib fractures and hemothorax from occurring during the compression of the patient's chest.

[0064] When the first plate 700 is fitted to the first pad lower portion 620, the bottom portion 710 faces the seat portion 624 with a gap space (A) therebetween.

[0065] When the volume of the gap space (A) decreases during chest compression of the patient, the bottom surface of the bottom part 710 may come into contact with the seat part 624 .

[0066] The first plate 700 has a protruding member 720 protruding from a bottom 710, the protruding member 720 being engageable with a protruding member insertion hole 622 so as to be engaged with the first pad lower portion 620.

[0067] The protruding member 720 may protrude in a circular shape so as to be fitted into the protruding member insertion opening 622 .

[0068] The cover of the present invention is not limited to being realized by fitting a first pad 600 and a first plate 700 together, but may also be realized by fitting a second pad 800, which is a modified version of the first pad 600, and a second plate 900, which is a modified version of the first plate 700.

[0069] Hereinafter, a cover according to another embodiment of the present invention, which is realized by fitting the second pad 800 and the second plate 900, will be described in detail.

[0070] Figure 7 is an oblique view of a second pad constituting a cover according to another embodiment of the present invention, Figure 8 is a cross-sectional view taken along CC in Figure 7, Figure 9 is an oblique view of the lower part of the second pad included in area D in Figure 8, and Figure 10 is a plan view of the lower part of the second pad included in area D in Figure 8.

[0071] As shown in FIGS. 7 to 10, the second pad 800 has an outer shape including a second pad upper portion 810 into which the lower end of the piston 310 is fitted, and a second pad lower portion 820 on the underside for compressing the patient's chest, and the second pad upper portion 810 may have a piston fitting portion 811 formed thereon.

[0072] The upper part 810 of the second pad forms a piston fitting opening 8110 by a piston fitting portion 811 integrally formed in a bent shape from the lower part 820 of the second pad, and the piston 310 can be fastened to the upper part 810 of the second pad when the lower end thereof contacts the second plate 900 and a fastening member (not shown) formed on a part of the outer circumferential surface is drawn into the piston fitting opening 8110 by rotation of the cover.

[0073] The piston fitting portion 811 forms a piston fitting hole 8110, and the piston 310 can have a lower end fitted into the second pad upper portion 810 through the piston fitting hole 8110.

[0074] In addition, the piston fitting portion 811 is a portion that is bent and formed from the second pad upper portion 810 to form a piston fitting opening 8110 into which the piston 310 can be retracted, and includes a first piston fitting portion 811a, a second piston fitting portion 811b, a third piston fitting portion 811c, and a fourth piston fitting portion 811d.

[0075] In addition, a pair of grooves 8024a, 8024b are formed in the piston fitting portion 811 between the first piston fitting portion 811a and the second piston fitting portion 811b and between the third piston fitting portion 811c and the fourth piston fitting portion 811d, and when the piston 310 is fitted into the piston fitting port 8110, a fastening member formed on a part of the outer surface of the piston 310 can be pulled into the pair of grooves 8024a, 8024b.

[0076] That is, the piston 310 can be fastened to the second pad 800 by contacting the lower end of the piston 310 with the second plate 900 and the fastening member being drawn into the pair of grooves 8024a and 8024b.

[0077] In addition, during the process of engagement and disengagement between the fastening member of the piston 310 and the pair of grooves 8024a, 8024b, the lower part of the piston fitting portion 811 expands (or flows) outward from the second pad upper part 810 so that the fastening member of the piston 310 is retracted or pulled out from the pair of grooves 8024a, 8024b, and therefore an expansion space 8101 can be formed in the gap space with the second pad upper part 810.

[0078] The second pad upper portion 810 may be made of at least one of polyurethane, polypropylene, and biocompatible silicone, which are high-hardness materials, so that the contraction and expansion of the piston 310 and the corresponding force can be transmitted to the cover regardless of various external forces applied from the outside.

[0079] In addition, the second pad upper portion 810 has a Shore A hardness of 40 to 60 if made of biocompatible silicone, and an Asker C hardness of 25 to 30 if made of other materials. In one embodiment of the present invention, the Asker C hardness can be measured using an Asker hardness tester, which measures the hardness based on the depth to which the indenter of a predetermined shape is pressed into the surface of a sample using a spring force to deform the surface and measure the hardness when the resistance of the sample and the spring force are balanced. Shore hardness can be measured by measuring the height of the bounce when a dropping object with a small diamond attached to its end is dropped from a certain height.

[0080] The second pad lower part 820 is the D region part in FIG. 8 and is integrally formed with the second pad upper part 810, and when the piston 310 is expanded toward the patient's chest, it can come into direct contact with the patient's chest compression points and compress the patient's chest.

[0081] The second pad lower portion 820 is formed with a housing 821, which is divided into an integrally formed first housing 821a and a second housing 821b, and includes a plurality of air flow ports 823, a first seating portion 824, a second seating portion 825, and a partition portion 826.

[0082] The first housing 821a includes a first protruding member insertion opening 822a into which the first protruding member 920 of the second plate 900 is fitted, thereby realizing the fitting of the second pad 800 and the second plate 900.

[0083] In the first housing 821a, the gap space (A) where negative pressure is generated is divided into multiple sections by multiple partitions 826. As a result, when pressure is transmitted from the patient's chest and the volume of the gap space (A) decreases, not only can all of the multiple lower surfaces move toward the bottom 910 of the second plate 900, but only a portion of the multiple lower surfaces that is in contact with the patient's chest compression point and receives pressure of a certain strength or more from the patient's chest can move toward the first plate 700.

[0084] The first protruding member insertion opening 822a is preferably circular and formed on the first housing 821a so that the first protruding member 920 can be fitted therein.

[0085] Due to the structure of the housing 821, the second housing 821b is connected to the first housing 821a by a plurality of partitions 826, and includes a second protruding member insertion port 822b into which the second protruding member 930 of the second plate 900 is fitted, thereby realizing the fitting of the second pad 800 and the second plate 900 together with the first housing 821a.

[0086] The second protruding member insertion opening 822b is preferably circular and formed on the second housing 821b so that the second protruding member 930 can be fitted therein.

[0087] The side walls of the first housing 821a and the second housing 821b can protrude upward so that a gap space (A, B) is created between the bottom 910 of the second plate 900 due to the fitting structure of the second pad 800 and the second plate 900.

[0088] In addition, the first housing 821a and the second housing 821b may be embodied in a bellows shape so that the volume of the gap spaces (A, B) can be changed.

[0089] The tops of the first housing 821a and the second housing 821b are coupled to the bottom 910 of the second plate 900, and the tops of the first housing 821a and the second housing 821b may be provided with (or coated with) an adhesive means (e.g., adhesive) so as to maintain the mating structure between the second pad 800 and the second plate 900. However, the adhesive means is not limited to being provided on the tops of the first housing 821a and the second housing 821b, and may also be provided on the bottom 910.

[0090] The plurality of air flow ports 823 are formed on the underside of the first housing 821a and the second housing 821b, respectively, and include a plurality of first air flow ports 823a formed on the underside of the first housing 821a and a plurality of second air flow ports 823b formed on the underside of the second housing 821b.

[0091] The first and second air flow ports 823a, 823b allow air in the gap space (A) between the bottom 910 of the second plate 900 and the first housing 821a, and the gap space (B) between the bottom 910 and the second housing 821b to flow outward, respectively, during the process of the patient's chest being compressed by the expansion of the piston 310, thereby reducing the volume of the gap spaces (A, B).

[0092] The first seating portion 824 is provided in plurality so as to be provided in each gap space (A) of the first housing 821a which is divided into a plurality of spaces by a plurality of partitions 826, and when the air in the gap space (A) flows out through a plurality of first air flow ports 823a and the volume of the gap space (A) decreases, the first seating portion 824 comes into contact with the bottom 910 of the second plate 900, causing the gap space (A) to be in a negative pressure state.

[0093] As a specific example, the first mounting portion 824 surrounds the center of the underside of the bottom 910 of the second plate 900, and when the peripheral underside of the bottom 910, which is vertically parallel to the first mounting portion 824, moves downward due to downward pressure applied from the fastening member provided on the piston 310 as the piston 310 expands, it comes into contact with the peripheral underside of the bottom 910, and thus the partitioned gap space (A) can become negative pressure.

[0094] The second seating part 825 is provided in the gap space (B) of the second housing 821b, and when the air in the gap space (B) defined by the plurality of second air flow ports 823b flows outward and the volume of the gap space (B) decreases, the second seating part 825 comes into contact with the bottom 910 of the second plate 900, causing the gap space (B) to be in a negative pressure state.

[0095] For example, when the center of the underside of the bottom 910 of the second plate 900, which is vertically parallel to the second mounting portion 825, moves downward due to downward pressure applied by the expansion of the piston 310, the second mounting portion 825 comes into contact with the center of the underside of the bottom 910, and thus the gap space (B) may become negative pressure.

[0096] It is preferable to provide a plurality of partitions 826 to divide the gap space (A) of the first housing 821a into a plurality of sections, and each partition 826 is provided in a form that connects the first housing 821a and the second housing 821b.

[0097] The second pad lower portion 820 is made of at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, polyurethane, and biocompatible silicone, and due to the characteristics of such materials, can be embodied as a foam that conforms to the shape of the patient's chest.

[0098] In addition, the biocompatible silicone of the second pad lower portion 820 may have a Shore A hardness of 10 to 30, and the other materials may have an Asker C hardness of 10 to 20.

[0099] Meanwhile, the second pad lower portion 820 needs to conform to the patient's chest when compressing the patient's chest. For this reason, the lower surfaces of the first and second housings 821a and 821b, which come into contact with the compression points of the patient's chest, are preferably made of biocompatible silicone, which is easily conformable to the patient's chest, among applicable materials. This continuously provides a buffering effect that relieves and distributes the pressure acting on the patient's chest, thereby preventing rib fractures and hemothorax from occurring during the compression of the patient's chest.

[0100] When the second plate 900 is fitted to the second pad lower portion 820, the bottom portion 910 faces the first seating portion 824 and the second seating portion 825 with gap spaces (A, B) therebetween.

[0101] When the volume of the gap space (A, B) decreases during chest compression of the patient, the bottom surface of the bottom part 910 may come into contact with the seat part 624 .

[0102] Such a second plate 900 includes a first protruding member 920 that can be fitted into a first protruding member insertion opening 822a so as to fit with the second pad lower portion 820, and a second protruding member 930 that is positioned adjacent to the center of the bottom portion 910 more closely than the first protruding member 920 and can be fitted into a second protruding member insertion opening 822b.

[0103] The first protruding member 920 can protrude in a circular shape from the bottom 910 so as to be fitted into the first protruding member insertion opening 822a.

[0104] The second protruding member 930 can protrude in a circular shape from the bottom 910 so as to be fitted into the second protruding member insertion opening 822b.

[0105] Compared to the cover of one embodiment of the present invention, the cover according to another embodiment of the present invention has the advantage that the engagement between the second pad 800 and the second plate 900 is realized by a relatively large number of protruding members 920, 930, thereby reinforcing the engagement structure between the pad and the plate.

[0106] As described above, the detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to embody and practice the present invention. Although the present invention has been described above with reference to the preferred embodiments, those skilled in the art will understand that various modifications and variations of the present invention can be made without departing from the scope of the present invention. For example, those skilled in the art may utilize the various configurations described in the above embodiments in combination with each other. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0107] The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Therefore, the above detailed description should not be interpreted as restrictive in all respects, but should be considered as illustrative. The scope of the present invention is determined by a reasonable analysis of the appended claims, and all modifications within the scope of the equivalents of the present invention are included within the scope of the present invention. The present invention is not intended to be limited to the embodiments disclosed herein, but to be accorded the widest scope consistent with the principles and novel features disclosed herein. Furthermore, claims that are not explicitly cited in the claims may be combined to form embodiments, or new claims may be included by amendment after filing. Industrial Applicability

[0108] The piston cover of the cardiopulmonary resuscitation device of the present invention continuously provides a cushioning effect to the patient that relieves and distributes the pressure acting on the patient's chest during chest compressions, thereby preventing rib fractures and hemothorax during chest compressions, and is therefore industrially applicable.

Claims

1. A cover fitted to a piston 310 for compressing the chest of a patient, The cover is a first pad 600 integrally formed with a first pad upper part 610 having a pair of grooves 6024a, 6024b formed between a first piston fitting part 611a and a second piston fitting part 611b forming a piston fitting opening 6110 and between a third piston fitting part 611c and a fourth piston fitting part 611d, and when the piston 310 is fitted into the piston fitting opening 6110, fastening members formed on a part of the outer circumferential surface of the piston 310 are drawn into the pair of grooves 6024a, 6024b; and a first pad lower part 620 having a first pad lower part 620 that, when the piston 310 is expanded, generates negative pressure to compress the chest compression points of the patient on its lower surface, and when the piston 310 is contracted, pulls the chest of the patient on its lower surface and moves it upward by the negative pressure; a protruding member (720) provided to be fitted to the first pad lower portion (620), and a first plate (700) fitted to an upper portion of the first pad lower portion (620) to form a gap space (A).

2. The first pad lower portion 620 is a housing 621 including an outer housing 621a and an inner housing 621b integrally formed such that the upper portion of the outer housing 621a is connected to the bottom portion 710 of the first plate 700; a plurality of air flow holes 623 formed on the bottom surface of the inner housing 621b to allow air to flow in the gap space (A) between the inner housing 621b and the bottom 710; 2. The piston cover of claim 1, further comprising a seating portion 624 provided in the gap space (A) so as to contact the bottom portion 710 when the volume of the gap space (A) decreases due to air in the gap space (A) flowing to the outside through the air flow port 623.

3. 3. The piston cover of claim 2, wherein the first pad lower portion (620) has a protrusion member insertion opening (622) at the boundary between the outer housing (621a) and the inner housing (621b) into which the protrusion member (720) can be fitted.

4. The piston cover of the cardiopulmonary resuscitation device of claim 3, wherein the outer housing (621a) and the inner housing (621b) have side walls that form the protruding member insertion opening (622) protruding upward so that the gap space (A) is generated between the bottom (710) due to the fitting structure of the first pad (600) and the first plate (700).

5. 5. The piston cover of claim 4, wherein the inner housing 621b is configured to generate a negative pressure in the gap space (A) when the volume of the gap space (A) decreases so that the bottom 710 and the seat 624 provided in the gap space (A) come into contact with each other, and when the piston 310 contracts after the negative pressure is generated in the gap space (A), the inner housing 621b is moved upward, pulling the patient's chest against its lower surface.

6. the first pad lower portion 620 is made of at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, polyurethane, and biocompatible silicone; The piston cover of the cardiopulmonary resuscitation device according to claim 1, characterized in that the biocompatible silicone has a Shore A hardness of 10 to 30, and at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, and polyurethane has an Asker C hardness of 10 to 20.

7. The piston cover of claim 6, wherein the lower surface of the first pad lower portion 620, which presses against the chest compression point of the patient, is made of biocompatible silicone.

8. The piston cover of claim 1, wherein the first pad (600) is made of at least one of polyurethane, polypropylene, and biocompatible silicone.

9. A cover fitted to a piston 310 for compressing the chest of a patient, The cover is a second pad 800 integrally formed with a second pad upper part 810 having a pair of grooves 8024a, 8024b formed between a first piston fitting part 811a and a second piston fitting part 811b forming a piston fitting opening 8110 and between a third piston fitting part 811c and a fourth piston fitting part 811d, and when the piston 310 is fitted into the piston fitting opening 8110, fastening members formed on a part of the outer circumferential surface of the piston 310 are drawn into the pair of grooves 8024a, 8024b; and a second pad lower part 820 having a second pad lower part 820 that, when the piston 310 is expanded, generates negative pressure and compresses the chest compression points of the patient on its lower surface, and when the piston 310 is contracted, pulls the chest of the patient on its lower surface and moves it upward by the negative pressure; a first protruding member 920 and a second protruding member 930 are provided to be fitted to the second pad lower portion 820, and a second plate 900 is fitted to an upper portion of the second pad lower portion 820 to form gap spaces (A, B); The second pad lower portion 820 includes a first housing 821 a having a first protruding member insertion opening 822 a into which the first protruding member 920 is fitted, and a second housing 821 b having a first protruding member insertion opening 822 b into which the second protruding member 930 is fitted, A piston cover for a cardiopulmonary resuscitation device, characterized in that a gap space (A) is formed between the first housing 821a and the bottom (910) of the second plate 900, and a gap space (B) is formed between the second housing 821b and the bottom (910) of the second plate 900.

10. The second pad lower portion 820 includes a first housing 821a whose upper portion is coupled to the bottom portion 910 of the second plate 900 and which forms the first protruding member insertion opening 822a into which the first protruding member 920 is fitted; the second housing 821b, the upper portion of which is coupled to the bottom portion 910 of the second plate 900 and which forms the second protruding member insertion opening 822b into which the second protruding member 930 is fitted; a first air flow port 823a for allowing air to flow in the gap space (A) between the first housing 821a and the bottom 910, and a second air flow port 823b for allowing air to flow in the gap space (B) between the second housing 821b and the bottom 910, the first air flow port 823a being formed on the bottom surface of each of the first housing 821a and the second housing 821b; a plurality of partitions 82 for partitioning the gap space (A) of the first housing 821a into a plurality of partitions; a plurality of first seating portions 824 provided in each of the gap spaces A partitioned by the partitioning portions 826 so that the air in the gap space A flows to the outside through the first air flow port 823a, and the volume of the gap space A decreases, and the first seating portions 824 come into contact with the bottom portion 910; The piston cover of claim 9, further comprising a second seating portion 825 provided in the gap space (B) so as to contact the bottom portion 910 when the volume of the gap space (B) decreases due to the air in the gap space (B) flowing to the outside through the second air flow port 823b.

11. The piston cover of the cardiopulmonary resuscitation device of claim 10, characterized in that the side walls forming the first protruding member insertion opening 822a and the second protruding member insertion opening 822b of the first housing 821a and the second housing 821b protrude upward so that the gap space (A, B) is generated between the bottom 910 due to the fitting structure of the second pad 800 and the second plate 900.

12. 12. The piston cover of claim 11, wherein the first housing 821a and the second housing 821b are configured such that when the volume of the gap space (A, B) decreases so that the bottom 910 and the first seat 824 and the second seat 825 come into contact with each other, negative pressure is generated in the gap space (A, B), and when the piston 310 contracts after negative pressure is generated in the gap space (A, B), the first housing 821a and the second housing 821b are moved upward, pulling the patient's chest against their lower surface.

13. the second pad lower portion 820 is made of at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, polyurethane, and biocompatible silicone; The piston cover of the cardiopulmonary resuscitation device according to claim 9, characterized in that the biocompatible silicone has a Shore A hardness of 10 to 30, and at least one of ethylene vinyl acetate, polyethylene, polyethylene-polypropylene blend, polystyrene, neoprene, chloroprene, and polyurethane has an Asker C hardness of 10 to 20.

14. The piston cover of the cardiopulmonary resuscitation apparatus according to claim 13, wherein the lower surface of the second pad lower portion 820, which presses against the chest compression point of the patient, is made of biocompatible silicone.

15. The piston cover of a cardiopulmonary resuscitation apparatus according to claim 9, wherein the second pad (800) is made of at least one of polyurethane, polypropylene, and biocompatible silicone.

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