Compression devices for chest compressions

Abstract

The present disclosure relates to a compression device (1) for compressing a chest cavity (2), comprising: a compression device (10), the compression device comprising a body (101), the compression device comprising a first connection portion (103), a second connection portion (104) and a first end surface (S3) facing the chest cavity; a fixing bandage (20), the fixing bandage being capable of surrounding the chest cavity and being connected to the first connection portion with a first end section in its longitudinal extension and connected to the second connection portion with a second end section opposite to the first end section; the first connection portion and the second connection portion being spaced apart from each other by a first distance (D1) in the transverse direction of the body and spaced apart from the first end surface by a second distance (D2) in the longitudinal direction of the body, the first distance and the second distance being set so that when compression is performed by the compression device, full circumferential compression and full circumferential release of the chest cavity can be achieved through the combined action of the compression device and the fixing bandage. The compression device has an improved compression effect.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical equipment, and more particularly, to a compression device for performing chest compressions. Background Art

[0002] During cardiopulmonary resuscitation (CPR), chest compressions are a crucial step in the treatment process. The quality of these compressions can even directly impact whether the patient can recover spontaneous breathing and circulation. In some cases, chest compressions can be performed using a chest compression device, such as the commonly available combined anterior-posterior compression and circumferential contraction compression devices.

[0003] The inventors investigated compression devices known in practice and discovered hitherto unknown disadvantages in the known compression devices. Figure 1 Schematic diagram of a chest cavity 2' being compressed using a compression device 1' known in practice, wherein the solid line L1 shows the static contour of the chest cavity 2' when not compressed, and the dotted line L1' shows the instantaneous contour of the chest cavity 2' when the chest cavity 2' is compressed the deepest. Figure 1 As shown, the compression device 1' may include: a compression device 10' for installation on the front side of the chest cavity 2'; a rigid fixed back plate 30' for installation on the back side of the chest cavity 2'; and fixed bandages 20', 20" for installation on the left and right sides of the chest cavity 2' and connected between the compression device 10' and the fixed back plate 30'. During the compression process, the compression device 10' can be controlled so that its compression head (at Figure 1 ) performs telescopic movement in the forward direction z to achieve single-point compression on the sternum outside the heart.

[0004] When such a compression device 1' is used to compress the chest cavity 2', Figure 1 As shown by the dotted line L1′ in the diagram, the chest cavity 2′ may expand outward at least partially in the horizontal direction (or in the lateral direction) on the left and right sides of the chest cavity 2′. This may lead to the following problems: during the compression period of the chest cavity 2′, part or even most of the compression kinetic energy provided by the pressing device 10′ to the chest cavity 2′ is released outward due to the at least partial outward expansion of the chest cavity 2′, which is not conducive to the formation of positive pressure in the chest cavity 2′. During the release period of the chest cavity 2′, the part of the chest cavity 2′ that expanded outward will return inward to its original position, which is not conducive to the formation of negative pressure in the chest cavity 2′. Therefore, using such a pressing device 1′ to press the chest cavity 2′ may not achieve the desired compression effect, and may even lead to failure of cardiopulmonary resuscitation. This is undesirable. Summary of the Invention

[0005] Therefore, the object of the present disclosure is to provide an improved compression device for compressing the chest cavity, wherein an improved compression effect on the chest cavity can be achieved by the compression device.

[0006] The present disclosure relates to a compression device for performing compression on a chest cavity, characterized in that the compression device comprises: a compression device, the compression device comprising a main body, the main body having a first connecting part, a second connecting part and a first end face facing the chest cavity; a fixing bandage, the fixing bandage being able to surround the chest cavity and being able to be connected to the first connecting part with a first end section in its longitudinal extension and to the second connecting part with a second end section opposite to the first end section; wherein the first connecting part and the second connecting part are spaced apart from each other by a first distance in the transverse direction of the main body and are spaced apart from the first end face by a second distance in the longitudinal direction of the main body, the first distance and the second distance being set so that when compression is performed by the compression device, full-circle compression and full-circle release of the chest cavity can be achieved by the joint action of the compression device and the fixing bandage.

[0007] The beneficial technical effects of the present disclosure may include: during the chest compression phase, the chest cavity can contract inwardly around the entire circumference, which helps to form a relatively high positive pressure in the chest cavity, thereby generating relatively more forward blood flow in the blood vessels; during the chest release phase, the compression kinetic energy stored in the chest cavity and the chest cavity's own elasticity can simultaneously drive the chest cavity to expand outward around the entire circumference, which helps to form a relatively high negative pressure in the chest cavity, thereby improving venous return and myocardial perfusion. An improved compression cycle can be achieved by alternating high positive pressure and high negative pressure on the chest cavity.

[0008] In some embodiments, the first distance may be set to be between 100 mm and 170 mm, and the second distance may be set to be between 35 mm and 60 mm.

[0009] In some embodiments, the lower limit value of the first distance can be selected from the following set: 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 125, 130, in mm; and / or the upper limit value of the first distance can be selected from the following set: 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, in mm.

[0010] In some embodiments, the lower limit value of the second distance can be selected from the following set: 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, in mm; and / or the upper limit value of the second distance can be selected from the following set: 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 52, 54, 56, 58, 60, in mm.

[0011] In some embodiments, the first distance may be set to be between 117 mm and 121 mm, and / or the second distance may be set to be between 40 mm and 44 mm.

[0012] In some embodiments, the first distance may be set to be between 105 mm and 115 mm, and / or the second distance may be set to be between 50 mm and 60 mm.

[0013] In some embodiments, the first distance and the second distance can be set so that the width of the chest cavity in the horizontal direction x can be reduced by 5% to 8%, for example, 6% to 7%, and / or the width in the forward direction z can be reduced by 5% to 10%, for example, 6% to 8% when compression is performed.

[0014] In some embodiments, the first distance and the second distance can be set so that the rate of change of the cross-sectional area of ​​the chest cavity during compression can reach between 16% and 20%, such as between 17% and 18%.

[0015] In some embodiments, the fixation bandage can be made of an inelastic, flexible material. For example, the fixation bandage can be made of a non-woven material and / or a woven material.

[0016] In some embodiments, the effective length of the fixing bandage can be set to between 50 cm and 125 cm, for example, between 45 cm and 120 cm, for example, between 60 cm and 110 cm, for example, approximately 80 cm or approximately 90 cm, and / or the width of the fixing bandage can be set to between 80 mm and 100 mm, for example, between 85 mm and 95 mm. Here, the effective length of the fixing bandage can be understood as the longitudinal extension of the fixing bandage between the first and second connecting portions, or between the two buckles provided therewith. The overall length of the fixing bandage can be approximately equal to the effective length, or greater than the effective length, for example, 30 cm to 40 cm greater than the effective length. In other words, the overall length of the fixing bandage can be set to between 90 cm and 155 cm, for example, between 95 cm and 150 cm, for example, between 100 cm and 140 cm, for example, approximately 110 cm or approximately 120 cm.

[0017] In some embodiments, the pressing device may include a pressing head disposed within the body, the pressing head being capable of moving between an extended position and a retracted position along the longitudinal direction of the body, wherein in the retracted position the free end of the pressing head extends beyond the first end face by a first length, and in the extended position the free end of the pressing head extends beyond the first end face by a second length, wherein the second length is greater than the first length.

[0018] In some embodiments, the pressing device may be provided with a base on the free end portion close to the chest cavity, and the base includes a boss extending in the transverse direction of the body to increase the contact area between the pressing device and the chest cavity.

[0019] In some embodiments, the first connecting portion and the second connecting portion can be arranged to be spaced apart from the corresponding boss by a third distance in the longitudinal direction of the main body, and the projection in the longitudinal direction of the main body is located within the projection of the corresponding boss, so that the first connecting portion and the second connecting portion can be prevented from directly contacting the ground when the pressing device falls.

[0020] In some embodiments, the body may have a first side surface and a second side surface that are opposite each other in the transverse direction of the body, one or more first connecting portions being provided on the first side surface, and one or more second connecting portions being provided on the second side surface. Preferably, two first connecting portions and two second connecting portions are provided. Further preferably, the two first connecting portions and the two second connecting portions may form the four corners of a rectangle.

[0021] In some embodiments, the first connecting portion and the second connecting portion may be configured as hooks, respectively. Buckles may be provided at the two free ends of the fixing bandage, respectively, and the buckles are used to be hooked onto the corresponding hooks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present disclosure will be described in more detail below with reference to the accompanying drawings and specific embodiments. The schematic drawings are briefly described as follows:

[0023] Figure 1 is a schematic diagram of chest compression using a compression device known in practice, wherein the solid line L1 shows the static contour of the chest when the chest is not compressed, and the dashed line L1′ shows the instantaneous contour of the chest when the chest is compressed the deepest;

[0024] Figure 2 is a schematic diagram of chest compression using a compression device according to some embodiments of the present disclosure, wherein the solid line L2 shows the static contour of the chest when the chest is not compressed, and the dashed line L2′ shows the instantaneous contour of the chest when the chest is compressed the deepest;

[0025] Figure 3is a schematic front view of a chest cavity, showing a compression area on the chest cavity of a compression device according to some embodiments of the present disclosure;

[0026] Figure 4 is a schematic diagram of the chest contour when compression is performed on the chest using a compression device when the first distance D1 is set to be greater than 170 mm and the second distance D2 is set to be between 35 mm and 60 mm. The solid line L3 shows the static chest contour when the chest is not compressed, and the dashed line L3′ shows the instantaneous chest contour when the chest is compressed to its deepest level.

[0027] Figure 5 FIG4 is a schematic diagram of the chest contour when compression is performed on the chest using a compression device when the first distance D1 is set to less than 100 mm and the second distance D2 is set to between 35 mm and 60 mm. The solid line L4 shows the static chest contour when the chest is not compressed, and the dashed line L4′ shows the instantaneous chest contour when the chest is compressed to the deepest level.

[0028] Figure 6 FIG5 is a schematic diagram of the chest contour when compression is performed on the chest using a compression device with the first distance set to between 100 mm and 170 mm and the second distance D2 set to less than 35 mm. The solid line L5 shows the static chest contour when the chest is not compressed, and the dashed line L5′ shows the instantaneous chest contour when the chest is compressed to the deepest level.

[0029] Figure 7 FIG6 is a schematic diagram of the chest contour when compression is performed on the chest using a compression device with the first distance set to between 100 mm and 170 mm and the second distance D2 set to greater than 60 mm. The solid line L6 shows the static chest contour when the chest is not compressed, and the dashed line L6′ shows the instantaneous chest contour when the chest is compressed to the deepest level.

[0030] Figure 8 is a schematic perspective view of a pressing device of a pressing apparatus according to some embodiments of the present disclosure;

[0031] Figure 9 yes Figure 8 A schematic front view of a pressing device of a pressing apparatus in FIG, wherein the pressing head of the pressing device is in a retracted position;

[0032] Figure 10A is a schematic diagram of the front side of a fixing bandage of a compression device according to some embodiments of the present disclosure;

[0033] Figure 10B yes Figure 10A Schematic diagram of the back side of the fixation bandage;

[0034] Figure 11 yes Figure 10A and Figure 10B Detail of the buckle that secures the bandage. DETAILED DESCRIPTION

[0035] The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0036] It should be understood that the terms used herein are only used to describe specific embodiments and are not intended to limit the scope of the present disclosure. All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0037] As used herein, spatially relative terms such as "upper," "lower," "left," "right," "front," "back," "higher," and "lower" may describe the relationship of one feature to another feature in the accompanying drawings. It should be understood that these spatially relative terms encompass different orientations of the device in use or operation, in addition to the orientation shown in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, a feature previously described as "below" another feature may now be described as "above" the other feature. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0038] Herein, the term "A or B" includes "A and B" and "A or B" rather than exclusively including "A" or only "B" unless specifically stated otherwise.

[0039] As used herein, the terms "illustrative" or "exemplary" mean "serving as an example, instance, or illustration," rather than as a "model" to be precisely copied. Any implementation described as exemplary herein is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, the present disclosure is not to be bound by any expressed or implied theory presented in the preceding technical field, background, summary, or detailed description.

[0040] As used herein, the term "substantially" is intended to include any minor variations due to design or manufacturing imperfections, device or component tolerances, environmental influences, and / or other factors.

[0041] In this document, the term "partially" may refer to any proportion, for example, greater than 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or even 100%, i.e., all.

[0042] Additionally, terms such as "first," "second," and the like may also be used herein for reference purposes only and are not intended to be limiting. For example, the terms "first," "second," and other numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0043] The present disclosure provides a compression device for performing compression on a chest cavity, wherein the compression device comprises: a compression device, wherein the compression device comprises a main body, wherein the main body has a first connection part, a second connection part and a first end face facing the chest cavity; a fixing bandage, wherein the fixing bandage can be connected to the first connection part with a first end section and to the second connection part with a second end section opposite to the first end section in its longitudinal extension and can at least partially surround the chest cavity, in particular to keep the compression device on the chest cavity; wherein the first connection part and the second connection part are spaced apart from each other by a first distance in the transverse direction of the main body, and are spaced apart from the first end face by a second distance in the longitudinal direction of the main body, wherein the first distance and the second distance are set so that when compression is performed by the compression device, full-circle compression and full-circle release of the chest cavity can be achieved by the joint action of the compression device and the fixing bandage.

[0044] Compared with the compression device according to the prior art, the compression device for compressing the chest cavity according to the present disclosure can have the following technical advantages: by appropriately setting the first distance and the second distance, the compression device and the fixing bandage can cooperate to achieve full-circle compression and full-circle release around the chest cavity. During the chest compression period, the chest cavity can contract inwardly all around, which helps to form a relatively high positive pressure in the chest cavity so as to form a relatively large forward blood flow in the blood vessels. In addition, the discharge of compression kinetic energy caused by local expansion of the chest cavity can be effectively avoided, which helps to improve the conversion efficiency of compression kinetic energy into positive pressure in the chest cavity. Therefore, the desired positive pressure in the chest cavity can be formed at a relatively small compression depth, which helps to reduce sternal displacement and thus reduce the risk of sternal fracture. During the chest release period, the compression kinetic energy stored in the chest cavity and the elasticity of the chest cavity itself can simultaneously drive the chest cavity to expand outward all around, which helps to form a relatively high negative pressure in the chest cavity, thereby improving venous return and myocardial perfusion. This will be described below with the help of Figures 2 to 11 Elaborate in more detail.

[0045] Figure 2A schematic diagram of compressing the chest cavity 2 using the compression device 1 according to some embodiments of the present disclosure is shown, wherein the solid line L2 shows the static contour of the chest cavity when the chest cavity 2 is not compressed, and the dotted line L2′ shows the instantaneous contour of the chest cavity when the chest cavity 2 is compressed the deepest. Figure 3 Shown Figure 2 Schematic front view of the thoracic cavity 2 in FIG. 1 , wherein the compression area on the thoracic cavity 2 where the compression device 1 performs compressions is shown.

[0046] like Figure 2 As shown, the compression device 1 for compressing the chest cavity 2 according to the present disclosure includes a compression device 10 and a fixing bandage 20. The fixing bandage 20 can at least partially surround the chest cavity 2 and can be connected to the compression device 10. Figure 3 As shown, in the height direction y, the fixing bandage 20 can be wrapped around the patient's pectoral muscle or breast area (at Figure 3 The compression point P is located between the lower half of the patient's sternum and the xiphoid process (schematically indicated by a dotted line L8 extending through the nipple). To prevent static displacement of the sternum or insufficient return to the static position from a compressed state, the compression device 10 can be lightweight, weighing, for example, less than 2.5 kg.

[0047] The pressing device 10 may include a body 101, a pressing head 102 (in the Figure 9 The driver can be driven by electricity or by compressed gas, such as compressed air, and can drive the pressing head 102 along the longitudinal direction of the body 101 (here, the forward direction z) between the extended position (not shown) and the retracted position (in the longitudinal direction z). Figure 9 The compression device 10 will be described below with the aid of the compression head 102. Figure 8 and Figure 9 The fixing bandage 20 will be described in more detail below. Figure 10A 、 Figure 10B and Figure 11 Elaborate in more detail.

[0048] Continue to see Figure 2The body 101 of the pressing device 10 may have a first side surface S1 and a second side surface S2 that are opposite to each other in the transverse direction of the body 101 (here, the horizontal direction x), and may have a first end surface S3 facing the chest cavity 2 and a second end surface S4 away from the chest cavity 2 in the longitudinal direction of the body 101 (here, the forward direction z). A first connecting portion 103, for example, two first connecting portions, may be provided on the first side surface S1, and a second connecting portion 104, for example, two second connecting portions, may be provided on the second side surface S2. The first connecting portion 103 and the second connecting portion 104 may be configured as hooks, respectively. The first connecting portion 103 and the second connecting portion 104 are spaced apart from each other by a first distance D1 in the transverse direction of the body 101 (here, the horizontal direction x), and are spaced apart from the first end surface S3 by a second distance D2 in the longitudinal direction of the body 101 (here, the forward direction z). By appropriately setting the data range of the first distance D1 and the second distance D2, such as the first to third groups of data ranges to be described below, the compression device 10 and the fixation bandage 20 can cooperate to achieve successive full-circle compression and full-circle release around the chest cavity 2 when compression is performed.

[0049] In the first data range, the first distance D1 can be set between 100 mm and 170 mm, and the second distance D2 can be set between 35 mm and 60 mm. Preferably, the first distance D1 can be set between 100 mm and 130 mm, and / or the second distance D2 can be set between 40 mm and 60 mm. Further preferably, the first distance D1 can be set between 114 mm and 124 mm, and / or the second distance D2 can be set between 37 mm and 47 mm. In the second data range, the first distance D1 can be set between 117 mm and 121 mm, and the second distance D2 can be set between 40 mm and 44 mm. Preferably, the first distance D1 can be set to 119 mm, and / or the second distance D2 can be set to 42 mm. In the third data range, the first distance D1 can be set between 105 mm and 115 mm, and the second distance D2 can be set between 50 mm and 60 mm. Preferably, the first distance D1 may be set to be between 108 mm and 112 mm, and / or the second distance D2 may be set to be between 53 mm and 57 mm.

[0050] It has been confirmed that when the first distance D1 and the second distance D2 are within the first set of data ranges, the chest cavity 2 will not experience the following changes during the compression process performed by the compression device 1. Figure 1 That is, the width of the chest cavity 2 in the horizontal direction x and the width in the forward direction z do not increase, but can be as shown in FIG. Figure 2 . In some cases, the width of the thoracic cavity 2 in the horizontal direction x can be reduced by 5% to 8%, for example, 6%, 7%, and / or the width of the thoracic cavity 2 in the forward direction z can be reduced by 5% to 10%, for example, 5% to 8%. In addition, when the first distance D1 and the second distance D2 are in the second set of data ranges or the third set of data ranges, during the compression process implemented by the compression device 1, the rate of change of the thoracic cavity cross-sectional area can reach a relatively large value, for example, between 16% and 20%. In this way, a relatively good compression effect can be achieved. In this article, "thoracic cavity cross-sectional area" can be understood as the cross-sectional area of ​​the thoracic cavity 2 in the plane composed of the x-axis and the z-axis, for example Figure 2 The cross-sectional area of ​​the thoracic cavity enclosed by the solid line L2 or the dotted line L2′.

[0051] However, it has been confirmed that when the first distance D1 and the second distance D2 are set to be in a data range other than the above data range, the chest cavity 2 may experience a phenomenon of local area expansion. Figures 4 to 7 Explained by way of example.

[0052] As a first comparison, Figure 4 The figure shows the outline of the chest cavity when the chest cavity 2 is compressed by the compression device 1 when the first distance D1 is set to be greater than 170 mm and the second distance D2 is set to be between 35 mm and 60 mm, wherein the solid line L3 shows the static outline of the chest cavity when the chest cavity 2 is not compressed, and the dotted line L3′ shows the instantaneous outline of the chest cavity when the chest cavity 2 is compressed the deepest. When the first distance D1 is set to be greater than 170 mm, the lateral centripetal force of the compression kinetic energy applied by the compression device 10 transmitted to the left and right sides of the chest cavity 2 via the fixing bandage 20 may be smaller than the outward expansion force transmitted to the upper left and upper right sides of the chest cavity 2 due to the downward displacement of the sternum in the forward direction z by the compression force. Figure 4 As shown, this may cause the upper left and right sides of the chest cavity to expand outward when the compression head extends and thereby compresses the chest cavity, thereby releasing the compression kinetic energy; and adversely affect the formation of negative pressure in the chest cavity when the compression head is retracted.

[0053] As a second comparative example, Figure 5The figure shows the outline of the chest cavity when the chest cavity is compressed by the compression device when the first distance D1 is set to be less than 100 mm and the second distance D2 is set to be between 35 mm and 60 mm, wherein the solid line L4 shows the static outline of the chest cavity when the chest cavity is not compressed, and the dotted line L4' shows the instantaneous outline of the chest cavity when the chest cavity is compressed the deepest. When the first distance D1 is set to be less than 100 mm, the upward contraction force of the compression kinetic energy applied by the compression device 10 transmitted to the bottom of the chest cavity 2 via the fixing bandage 20 may be smaller than the outward expansion force transmitted to the bottom of the chest cavity 2 due to the downward displacement of the sternum in the forward direction z due to the compression force. Figure 5 As shown, this may cause the lower left and right sides of the chest cavity to expand outward when the compression head is extended and thereby compresses the chest cavity, thereby releasing the compression kinetic energy; and adversely affect the formation of negative pressure in the chest cavity when the compression head is retracted.

[0054] As the third comparison, Figure 6 The figure shows the outline of the chest cavity when the chest cavity is compressed by the compression device 1 when the first distance is set to be between 100 mm and 170 mm and the second distance D2 is set to be less than 35 mm, wherein the solid line L5 shows the static outline of the chest cavity when the chest cavity is not compressed, and the dotted line L5' shows the instantaneous outline of the chest cavity when the chest cavity is compressed the deepest. When the second distance D2 is set to be less than 35 mm, the upward contraction force of the compression kinetic energy applied by the compression device 10 transmitted to the bottom of the chest cavity 2 via the fixing bandage 20 may be smaller than the outward expansion force transmitted to the bottom of the chest cavity 2 by the downward displacement of the sternum along the forward direction z due to the compression force. Figure 6 As shown, this may cause the lower left and right sides of the chest cavity to expand outward when the compression head is extended and thereby compresses the chest cavity, thereby releasing the compression kinetic energy; and adversely affect the formation of negative pressure in the chest cavity when the compression head is retracted.

[0055] As the fourth comparative example, Figure 7 The figure shows the outline of the chest cavity when the chest cavity is compressed by the compression device 1 when the first distance is set to be between 100 mm and 170 mm and the second distance D2 is set to be greater than 60 mm, wherein the solid line L6 shows the static outline of the chest cavity when the chest cavity is not compressed, and the dotted line L6′ shows the instantaneous outline of the chest cavity when the chest cavity is compressed the deepest. When the second distance D2 is set to be greater than 60 mm, the lateral centripetal force of the compression kinetic energy applied by the compression device 10 transmitted to both sides of the chest cavity via the fixing bandage may be smaller than the outward expansion force transmitted to the upper left and upper right sides of the chest cavity due to the downward displacement of the sternum in the forward direction z by the compression force. Figure 7 As shown, this may cause the upper left and right sides of the chest cavity to expand outward when the compression head extends and thereby compresses the chest cavity, thereby releasing the compression kinetic energy; and adversely affect the formation of negative pressure in the chest cavity when the compression head is retracted.

[0056] Figure 8 A schematic perspective view showing a pressing device 10 of a pressing apparatus 1 according to some embodiments of the present disclosure is shown. Figure 9 yes Figure 8 Schematic front view of the pressing device 1 of the pressing apparatus 1 in FIG. 1 , wherein the pressing head 102 of the pressing device 10 is in a retracted position. Figure 10A is a schematic diagram of the front side of the fixing bandage 20 of the compression device 1 according to some embodiments of the present disclosure. Figure 10B yes Figure 10A Schematic diagram of the back side of the fixing bandage 20 in FIG. Figure 11 yes Figure 10A and Figure 10B Detail of the buckle 201 for securing the bandage 20 in FIG.

[0057] like Figure 8 As shown, the compression device 10 may be provided with a base 105 at the free end portion 101-1 proximal to the thoracic cavity 2. The base includes a boss 106 extending in the transverse direction of the body 101, for increasing the contact area between the compression device 10 and the thoracic cavity 2. The base 105 may, for example, increase the contact area between the compression device 10 and the thoracic cavity 2, or the supporting area on the front side of the thoracic cavity 2, thereby reducing the pressure on the front side of the patient's thoracic cavity 2 caused by the compression device 10; and lower the center of gravity G1 of the compression device 10, such that the center of gravity G1 of the compression device 10 is closer to the first end surface S3 than to the second end surface S4.

[0058] exist Figure 8 In the embodiment of the present invention, the boss 106 exemplarily includes two first bosses 106' close to the first side surface S1 and two second bosses 106" close to the second side surface S2. However, this should not be understood as limiting the present disclosure. In other words, the boss 106 may suitably include other numbers of first bosses 106' and / or second bosses 106". Here, the two first bosses 106' may form a first concave arc-shaped notch (at Figure 8 The first arc-shaped notch 108 is not visible in the figure, and its specific structure can be schematically illustrated by referring to the second arc-shaped notch 108). The first arc-shaped notch can face the inner contour of the patient's left pectoral muscle or left breast when performing compression, that is, the contour of the left pectoral muscle or left breast close to the side of the midline of the chest cavity 2. The function of the first arc-shaped notch may include: avoiding the patient's left pectoral muscle or left breast to avoid damage to the left pectoral muscle or left breast when performing compression. Similarly, the two second bosses 106" can form a concave second arc-shaped notch 108. More technical content about the second arc-shaped notch 108 can be found in the description of the first arc-shaped notch, which will not be repeated here.

[0059] Advantageously, two first connection portions 103 may be provided on the first side surface S1 of the body 101. The two first connection portions 103 may be provided so as to be spaced apart from the corresponding first bosses 106' by a third distance in the longitudinal direction of the body 101, and their projections in the longitudinal direction of the body 101 are located within the projections of the corresponding first bosses 106', so as to prevent the first connection portions 103 from directly contacting the ground when the pressing device 10 falls. In other words, Figure 9 As shown, in the forward direction z, the first connection part 103 can be located above the corresponding first boss 106'; in the radial direction of the main body, the edge line L7 of the first connection part 103 can be located within the edge line L7' of the first boss 106'. Thus, when the pressing device 10 accidentally falls, the first connection part 103, such as the hook, can be prevented from directly contacting the ground, thereby protecting the first connection part 103, such as the hook. Here, "ground" can be generally understood as a flat plane. In addition, since the center of gravity of the pressing device 10 is relatively low, when the pressing device 10 accidentally falls, the first boss 106' of the pressing device 10 can have a tendency to rotate in the direction of gravity, which also helps to prevent the first connection part 103, such as the hook, from directly contacting the ground.

[0060] Similarly, two second connecting portions 104 may be provided on the second side surface S2 of the body 101. For more technical details regarding the second connecting portion 104 and its positional relationship with the second boss 106", please refer to the above description of the first connecting portion 103 and the first boss 106', which will not be repeated here.

[0061] like Figure 9 As shown, in the retracted position of the pressing head 102, the free end 102-1 of the pressing head 102 can extend beyond the first end surface S3 by a first length T1. In other words, in the retracted position of the pressing head 102, the pressing head 102 protrudes a first length T1 relative to the first end surface S3. The first length T1 can be between 4mm and 6mm. The purpose of the first length T1 is to enable the pressing device 10 to adapt to the front contour of the patient's chest cavity 2 when placed on the front side of the patient's chest cavity 2, thereby reducing the ineffective compression stroke of the pressing head 102. In addition, in the extended position of the pressing head 102, the free end 102-1 of the pressing head 102 can extend beyond the first end surface S3 by a second length. The second length is greater than the first length. Here, the second length can be between 50mm and 60mm. In this article, the second length can also be understood as the compression depth of the pressing head 102.

[0062] In addition, a protection pad 109 may be sleeved on the free end portion 102-1 of the pressing head 102. The thickness of the protection pad 109 may be calculated within the first length T1.

[0063] In order to fix the bandage 20 as Figure 2 As shown in the figure, the two free ends 20-1 and 20-2 of the fixing bandage 20 can be respectively equipped with a buckle 201. The structure of the buckle 201 is as follows: Figure 2 and Figure 10A 、 Figure 10B is schematically shown in Figure 11 As shown in detail in Figure 11 As shown, the buckle 201 includes a buckle body 201-1 and through holes 201-2 provided in the buckle body 201-1, in this exemplary embodiment, there are two through holes 201-2. The through holes 201-2 are designed to match the hooks so that the hook portion of the corresponding hook can be inserted into the through holes 201-2. Thus, the buckle 201 can be hooked to the corresponding hook, thereby enabling the fixing bandage 20 to be fixed as shown in FIG. Figure 2 is connected to the corresponding connecting portion as shown. In addition, in order to adjust the effective length of the fixing bandage 20 around the chest cavity 2 and thus adjust the tightness of the pressing device 1 around the chest cavity 2, a through slot 201-3 for adjusting the length of the fixing bandage 20 can be provided in the buckle body 201-1 of the buckle 201, and an adhesive surface S5 and a furry surface S6 can be provided on the back side of the fixing bandage 20 (that is, the side away from the patient when in use). The adhesive surface S5 can pass through the through slot 201-3 and be adhered to the furry surface S6. In some cases, the length of the adhesive surface S5 can be set to between 10 mm and 30 mm, in particular between 20 mm and 25 mm. In some cases, the width of the adhesive surface S5 can be set to be smaller than the width of the furry surface S6. Thereby, the effective length T3 of the fixing bandage 20 can be adjusted and tightened. Here, it is conceivable that Figure 10B There are many structural forms for adjusting the length and fastening of the bandage, and the present disclosure is not limited to a specific structural form, as long as it can easily adjust the length of the fixed bandage 20 and achieve a good fastening effect.

[0064] In some embodiments, the fixation bandage 20 can be made of an inelastic, flexible material. In this context, "inelastic material" refers to a material whose total length does not change by more than 0.1% of its original length when a tensile force of 1000 N is applied along its length. In other words, the total length of the material remains substantially unchanged when a tensile force of 1000 N is applied along its length. This helps avoid a reduction in the material's force conductivity due to elastic deformation, thereby effectively transmitting the compressive force applied by the compression device 10 on the anterior side of the thorax 2 to the lower periphery of the thorax 2.

[0065] In some embodiments, the effective length T3 of the fixation bandage 20 (in Figure 10A The length T2 (exemplified as the length between the two buckles 201) or the total length T2 can be set so that the fixing bandage 20 can surround the entire dorsal side of the thoracic cavity 2 and can surround at least 1 / 2 of the circumference of the thoracic cavity 2, preferably at least 2 / 3, and further preferably 3 / 4. Specifically, the effective length T3 of the fixing bandage 20 can be set to be between 50cm and 125cm, for example, between 45cm and 120cm, for example, between 60cm and 110cm, for example, set to about 65cm, about 76cm, about 80cm, about 90cm, about 96cm or about 120cm. The total length T2 of the fixing bandage can be set to be between 90cm and 155cm, for example, between 95cm and 150cm, for example, between 100cm and 140cm, for example, about 110cm or about 120cm. Thus, the entire dorsal side of the patient's thoracic cavity 2 can be surrounded by the flexible fixing bandage 20, and there is no need to use a fixing bandage such as Figure 1 The compression device 10 is supported by the rigid fixed backplate 30′ shown. This not only helps to improve the uniformity of the transmission of the compression force applied by the compression device 10, but also helps to enhance the stability of cardiopulmonary resuscitation, for example, on a soft or elastic chest support base. In addition, by omitting the rigid fixed backplate 30′, the compression device 1 according to the present disclosure can be manufactured with less material and at a lower cost, while also supporting a miniaturized design and facilitating portability.

[0066] Furthermore, the width W1 of the fixation bandage 20 can be set to between 80 mm and 100 mm, for example, approximately 85 mm, approximately 90 mm, approximately 95 mm, or approximately 100 mm. Thus, the fixation bandage 20 or the compressed area of ​​the thorax 2 can cover the apex region of the heart, thereby improving the contractile efficiency of the left ventricle of the heart.

[0067] Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing substantially from the spirit and scope of the present disclosure. Therefore, all such changes and modifications are intended to be within the scope of protection of the present disclosure as defined by the appended claims. The present disclosure is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A compression device for compressing the chest cavity, characterized in that: The pressing device comprises: A pressing device, the pressing device comprising a body having a first connecting portion, a second connecting portion, and a first end surface facing the chest cavity; a fixing bandage which can surround the thorax and can be connected in its longitudinal extension with a first end section to the first connecting part and with a second end section opposite the first end section to the second connecting part; In which, the first connecting portion and the second connecting portion are spaced apart from each other by a first distance in the transverse direction of the main body, and are spaced apart from the first end face by a second distance in the longitudinal direction of the main body, and the first distance and the second distance are set so that when compression is implemented by the pressing device, full-circle compression and full-circle release of the chest cavity can be achieved through the joint action of the pressing device and the fixing bandage, wherein the first distance is set to be between 100 mm and 170 mm, and the second distance is set to be between 35 mm and 60 mm.

2. The compression device for chest compression according to claim 1, characterized in that: The first distance is set to be between 117 mm and 121 mm, and / or the second distance is set to be between 40 mm and 44 mm.

3. The compression device for chest compression according to claim 1, characterized in that: The first distance is set to be between 105 mm and 115 mm, and / or the second distance is set to be between 50 mm and 60 mm.

4. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The first distance and the second distance are set so that the width of the thorax in the horizontal direction x can be reduced by 5% to 8% and / or the width in the forward direction z can be reduced by 5% to 10% when compression is performed.

5. The compression device for chest compression according to claim 2 or 3, characterized in that: The first distance and the second distance are set so that the rate of change of the cross-sectional area of ​​the chest cavity during compression can reach between 16% and 20%.

6. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The fixing bandage is made of an inelastic, flexible material.

7. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The effective length of the fixing bandage is set to be between 50 cm and 125 cm, and / or the width of the fixing bandage is set to be between 80 mm and 100 mm.

8. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The pressing device includes a pressing head arranged in the main body, and the pressing head can move between an extended position and a retracted position along the longitudinal direction of the main body. In the retracted position, the free end of the pressing head extends beyond the first end face by a first length, and in the extended position, the free end of the pressing head extends beyond the first end face by a second length, wherein the second length is greater than the first length.

9. The compression device for chest compression according to claim 8, characterized in that: The first length is between 4 mm and 6 mm, and / or the second length is between 50 mm and 60 mm.

10. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The pressing device is provided with a base on the free end portion close to the chest cavity. The base includes a boss extending in the transverse direction of the body to increase the contact area between the pressing device and the chest cavity.

11. The compression device for performing chest compression according to claim 10, characterized in that: The first connecting portion and the second connecting portion are arranged to be spaced apart from the corresponding bosses by a third distance in the longitudinal direction of the main body, and their projections in the longitudinal direction of the main body are located within the projections of the corresponding bosses, so that the first connecting portion and the second connecting portion can be prevented from directly contacting the ground when the pressing device falls.

12. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The body has a first side surface and a second side surface opposite to each other in a transverse direction of the body, one or more first connection parts are provided on the first side surface, and one or more second connection parts are provided on the second side surface.

13. The compression device for performing chest compression according to any one of claims 1 to 3, characterized in that: The first connecting portion and the second connecting portion are respectively configured as hooks, and buckles are respectively provided at the two free ends of the fixing bandage, and the buckles are used to be buckled onto the corresponding hooks.

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