CN115530946A - Suction device for respiratory tract obstruction and use method thereof - Google Patents

Abstract

A suction device for airway obstruction and its application method are provided. The suction device comprises a negative pressure generator, a connecting piece and a mask; the negative pressure generator comprises a shell and a piston rod, wherein a cavity is formed in the shell, a abdicating hole communicated with the cavity is formed in the upper end of the shell, an opening communicated with the cavity is formed in the lower end of the shell, the piston rod comprises a push-pull rod and a piston fixedly sleeved on the push-pull rod, the upper end of the push-pull rod penetrates out of the abdicating hole, and the piston is movably and hermetically connected with the inner side surface of the shell through a sealing ring; the upper side of the mask is provided with a first connecting tube which is communicated, and the lower side of the mask is provided with a flexible annular cushion which is used for being jointed with the face; the upper side of the connecting piece is connected with the opening in a sealing way, and the lower side of the connecting piece is connected with the first connecting cylinder in a sealing way. By using the suction device, the asphyxia patient can be effectively assisted and rescued in a simpler and labor-saving manner under the condition that the elastic throat pipe is not required to be inserted into the respiratory tract of the asphyxia patient.

Description

Suction device for respiratory tract obstruction and use method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a suction device for respiratory tract obstructions and a using method thereof.

Background

Foreign Body Airway Obstruction (FBAO) is a rare but treatable cause of accidental death. The asphyxia caused by the airway obstruction is an emergency situation which is dangerous to life, and if emergency treatment is not applied within 4-6 minutes, the respiration is stopped and becomes fatal; even if the life is restored, irreversible damage is often caused by too long time of oxygen deficiency. Therefore, during rescue, the respiratory tract obstruction caused by various reasons must be removed in a time-sharing and second-sharing manner, so that the airway is unblocked, the wounded person can be ensured to be sent backwards timely and safely, and the opportunity is provided for the next treatment of the wounded person. Because sufferers are initially conscious and responsive, there is often an opportunity to take life-saving interventions as early as possible. The most widely used method at present is the "Hellimek" abdominal percussive method, but this method requires professional training and is not always available to all. In addition, "Hellimeker" abdominal percussions can have serious side effects such as rupture, tearing and bleeding of the abdominal or thoracic viscera, rib fractures, and the like.

For this reason, devices and methods for aspirating foreign bodies obstructing the respiratory tract have been devised in the art which are suitable for use and implementation by the general public. US patent application No. US20200306420A1 discloses a suction device which, although it may help the general public to rapidly rescue sufferers of airway obstruction, it still suffers from the following disadvantages:

1) The device is provided with the elastic throat pipe, the elastic throat pipe is high in hardness and long in size, and a user is easy to worry about what he sees. Most importantly, the device is prone to secondary injury to the patient during the actual asphyxia procedure. Specifically, in the process of inserting the elastic throat tube into the respiratory tract, the elastic throat tube is easy to scratch the oropharynx or push in blocking foreign matters due to confusion. In addition, the mask and the face cannot be completely attached due to the existence of the elastic throat pipe, so that a vacuum-like environment cannot be formed, and the using effect is influenced.

2) Such devices require repeated manual pulling and pulling to create sufficient negative pressure within the device, which requires the rescuer's arms to maintain a high frequency of mechanical oscillation. However, in the actual use process, due to factors such as friction, physical strength of the rescuer and the like, the drawing frequency of the rescuer on the device is probably not enough to enable the inside of the device not to form enough negative pressure, so that the rescue fails.

3) The device is also provided with a material collecting container for collecting the drawn foreign matters, the material collecting container needs to be connected into the one-way duckbill valve, the one-way duckbill valve not only has the function of air outlet, but also needs to allow the sucked impurities such as mucus to flow out, and the opening of the air outlet end of the one-way duckbill valve is small, so that the device is likely to be blocked by the foreign matters, and the using effect of the device is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a suction device for respiratory obstruction, which is simpler and more labor-saving to operate and has large suction force. Under the condition that a 'Helmink' rescue mode cannot be effectively implemented, the suction device can be used for implementing quick and effective auxiliary rescue for the patient suffering from respiratory infarction asphyxia.

Another technical problem to be solved by the present invention is to provide a method for using the suction device as described above.

In order to solve the technical problems, the invention adopts the technical scheme that a suction device for the airway obstruction is provided, the suction device comprises a negative pressure generator and a face mask, and the face mask is communicated with the negative pressure generator through a connecting piece; the negative pressure generator comprises a shell and a piston rod movably inserted in the shell, an axially-through cavity is formed in the shell, a yielding hole communicated with the cavity is formed in the upper end of the shell, an opening communicated with the cavity is formed in the lower end of the shell, the piston rod comprises a push-pull rod and a piston fixedly sleeved on the push-pull rod, the upper end of the push-pull rod penetrates out of the yielding hole, and the outer side face of the piston is movably and hermetically connected with the inner side face of the shell; the upper side of the mask is provided with a first connecting tube which is communicated with the mask, and the lower side of the mask is provided with a flexible annular cushion which is used for being attached to the face; the upper side of the connecting piece is connected with the opening in a sealing mode, and the lower side of the connecting piece is connected with the first connecting cylinder in a sealing mode.

By adopting the suction device adopting the technical scheme, the piston rod can be firstly pushed to the bottommost end, then the flexible annular cushion of the mask surrounds the mouth of the suffocation patient and is tightly attached to the face, then one hand holds the mask to keep the seal between the mask and the face, the other hand quickly pulls the piston rod upwards to form strong vacuum suction in the cavity of the shell, then the hand which originally holds the mask quickly pulls up the whole suction device to release the vacuum suction in the shell, and after the mask completely leaves the face, the piston rod is pushed to the bottommost end again to discharge the air and foreign matters in the shell; and the blockage in the respiratory tract of the suffocation patient can be quickly extracted by repeating the operation steps. Therefore, under the condition that the elastic throat pipe is not required to be inserted into the respiratory tract of the sufferer, the sufferer can be effectively assisted and rescued in a simpler and labor-saving mode.

In the suction device for the airway obstruction, the connecting piece comprises a base disc, a hollow upper connecting cylinder is arranged on the upper side of the base disc, the upper connecting cylinder is inserted into the opening, and the outer side of the upper connecting cylinder is connected with the inner side of the opening in a sealing manner.

In the suction device for the airway obstruction, the connecting piece comprises a base disc, a hollow lower connecting cylinder is arranged on the lower side of the base disc, the first connecting cylinder is inserted into the lower connecting cylinder, and the outer side of the first connecting cylinder is hermetically connected with the inner side of the lower connecting cylinder.

In the suction device for the airway obstruction provided by the invention, the base plate is provided with a through vent hole.

In the suction device for the airway obstruction, the connecting piece comprises a base plate; a hollow upper connecting cylinder is arranged on the upper side of the base plate, the upper connecting cylinder is inserted into the open port, and the outer side of the upper connecting cylinder is hermetically connected with the inner side of the open port; a hollow lower connecting cylinder is arranged on the lower side of the base plate, the first connecting cylinder is inserted into the lower connecting cylinder, and the outer side of the first connecting cylinder is hermetically connected with the inner side of the lower connecting cylinder; the central axis of the lower connecting cylinder and the central axis of the upper connecting cylinder form a certain included angle. Therefore, in the process of using the suction device, the piston rod does not need to be vertically pulled upwards, but is pulled upwards in an inclined manner, and the suction device is more favorable for exerting force on rescuers with lower heights.

In the suction device for the airway obstruction, the mask is composed of a hollow mask body, the first connecting cylinder and the flexible annular cushion; the cover body is connected to the lower end of the first connecting cylinder, and the flexible annular pad is arranged on the lower side edge of the cover body.

In the suction device for the respiratory obstruction, the cover body is hemispherical, the edge of the lower side of the cover body is circular, and the flexible annular pad is circular. The hemispherical cover is adapted to the shape of the face of the animal so that the suction device can be used to rescue animals (cats or dogs) having a choking effect due to airway obstruction.

In the suction device for the respiratory obstruction, the suction device further comprises an air pressure sensor and a display electrically connected with the air pressure sensor, the display is mounted on the outer side of the shell, and the air pressure sensor is arranged in the connecting piece. The air pressure sensor can measure the negative pressure in the suction device, and the display displays the measurement result, so that a rescuer can control the drawing force according to the numerical value displayed by the display so as to suffocate patients under different conditions.

In order to solve another technical problem, the technical scheme adopted by the invention is to provide a using method, which comprises the following steps:

s1, pushing and pressing a piston rod to the bottommost end;

s2, surrounding the mouth of the suffocation patient by a flexible annular cushion of the mask and tightly fitting the mouth of the suffocation patient with the face of the suffocation patient;

s3, holding the mask by one hand to keep the mask sealed with the face, and rapidly drawing the piston rod upwards by the other hand to form vacuum suction in the cavity of the shell;

s4, quickly pulling up the whole suction device by a hand which originally holds the mask to release the vacuum suction in the suction device;

s5, after the face mask completely leaves the face, pushing the piston rod to the bottommost end again, and discharging air and foreign matters in the shell;

repeating the steps S2 to S5 until the blockage in the respiratory tract of the sufferer is pumped out.

In the using method provided by the invention, in the step S2, the flexible annular cushion of the mask surrounds the mouth and the nose of the suffocation patient and is tightly attached to the face.

In the use method according to the present invention, in step S1, when the piston rod is pushed to the lowermost end, the piston abuts against the link.

In the using method provided by the invention, the top of the push-pull rod is also provided with a crown 1 which can be held by a rescuer; in step S1, when the piston rod is pushed to the lowermost end, the lower side of the crown 1 abuts against the end face of the relief hole.

The invention also provides a suction device for the airway obstruction, which comprises a negative pressure generator and a mask, wherein the mask is communicated with the negative pressure generator through a connecting piece; the negative pressure generator comprises a shell and a piston rod movably inserted into the shell, wherein an axially through cavity is formed in the shell, a abdicating hole communicated with the cavity is formed in the upper end of the shell, an open hole communicated with the cavity is formed in the lower end of the shell, the piston rod comprises a push-pull rod and a piston fixedly sleeved on the push-pull rod, the upper end of the push-pull rod penetrates out of the abdicating hole, a first sealing ring is sleeved on the outer side surface of the piston, the inner side surface of the first sealing ring is in sealing connection with the outer side surface of the piston, and the outer side surface of the first sealing ring is in movable sealing connection with the inner side surface of the shell; the upper side of the mask is provided with a first connecting tube which is communicated, and the lower side of the mask is provided with a flexible annular cushion which is used for being attached to the face; the upper side of the connecting piece is connected with the opening in a sealing mode, and the lower side of the connecting piece is connected with the first connecting cylinder in a sealing mode.

In the suction device for the respiratory tract obstruction, provided by the invention, a second sealing ring is sleeved on the outer side surface of the piston, and the centers of the second sealing ring and the first sealing ring are both arranged on the central axis of the piston; the inner side surface of the second sealing ring is in sealing connection with the outer side surface of the piston, and the outer side surface of the second sealing ring is movably in sealing connection with the inner side surface of the shell.

In the suction device for the airway obstruction, the connecting piece comprises a base disc, a hollow upper connecting cylinder is arranged on the upper side of the base disc, the upper connecting cylinder is inserted into the opening, and the outer side of the upper connecting cylinder is hermetically connected with the inner side of the opening; the lower side of the base plate is provided with a hollow lower connecting cylinder, the first connecting cylinder is inserted into the lower connecting cylinder, and the outer side of the first connecting cylinder is connected with the inner side of the lower connecting cylinder 1 in a sealing mode.

In the suction device for the respiratory tract obstruction, the connecting piece is also provided with an opening hole, the opening hole penetrates through the base plate, the lower end of the opening hole is communicated with the outside, an outer one-way valve is arranged in the opening hole, and the outer one-way valve can allow gas in the connecting piece shell to flow out to the outside.

In the suction device for the airway obstruction provided by the invention, the top of the push-pull rod is also provided with a crown which can be held by a rescuer.

In the suction device for the airway obstruction provided by the invention, the upper end of the shell is also provided with an exhaust port communicated with the cavity.

In the suction device for the airway obstruction, when the piston moves towards the lower end of the shell, air in the shell enters the connecting piece through the upper connecting cylinder and then flows out of the mask through the vent hole and the lower connecting cylinder; when the piston moves towards the upper end of the shell, air in the shell flows to the outside from the abdicating hole and the exhaust port.

In the suction device for the airway obstruction, the mask is detachably connected with the connecting piece, so that the masks with different shapes and sizes can be replaced according to rescue objects.

In summary, the invention can achieve at least the following beneficial effects:

1. compared with the prior art, the suction device provided by the invention has the advantages that the elastic throat is removed/omitted, the fear of the claustrophobic space of the sufferer is avoided, and the discomfort caused by inserting the elastic throat into the respiratory tract, the fear of the mind of the user and the potential safety hazard caused by inserting the elastic throat into the respiratory tract are fundamentally avoided. Furthermore, the removal/omission of the resilient throat makes the suction device of the present invention safer to use for the rescue of children. In addition, the restraint of the elastic throat pipe on the placement of the mask is completely eliminated, and the perfect fit between the mask and the face can be ensured.

2. In the process of operating the suction device according to the using method of the invention, after the flexible annular cushion of the mask surrounds the mouth of the suffocation patient and is tightly attached to the face, one hand holds the mask to keep the seal between the mask and the face, the other hand rapidly pulls the piston rod upwards, so that strong vacuum suction can be formed in the cavity of the shell, then the hand which originally holds the mask is rapidly lifted to release negative pressure to form strong suction force on the respiratory tract, and the piston rod is pushed to the bottom to discharge the air in the shell, and meanwhile, the air and foreign matters in the shell can be discharged. The use method of the invention can form strong negative pressure in the shell without repeatedly drawing the piston rod. Because the elastic throat pipe is not limited, the force path of the arm can be maximized when a rescuer pulls the piston rod every time, so that sufficient negative pressure is generated in the suction device, and sufficient vacuum suction is formed, so that the blockage can be smoothly pulled out.

3. In the process of operating the suction device according to the using method of the invention, the piston rod is pushed to the bottom to discharge the air in the shell, and simultaneously the air and foreign matters in the shell can be discharged smoothly, the risk of backflow of the foreign matters is avoided, and the vent hole in the connecting piece is larger in size compared with the air outlet end opening of the duckbill valve, so that the situation of blockage is not easy to occur. In addition, a material collecting container is omitted, the size of the shell is convenient to increase, the air quantity in the cavity of the shell is improved, negative pressure capable of being formed during single drawing is increased, larger vacuum suction force is generated, and a better first-aid effect is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:

fig. 1 is a perspective assembly view of a suction device according to a first embodiment;

FIG. 2 is an exploded perspective view of a suction device according to an embodiment;

FIG. 3 is a reference diagram (one) illustrating the operation of the suction device according to the first embodiment;

fig. 4 is a reference diagram (two) of the usage status of the suction device provided in the first embodiment;

FIG. 5 is a reference diagram (III) showing the operation state of the suction device according to the first embodiment;

fig. 6 is a perspective assembly view of the suction device provided in the second embodiment;

fig. 7 is a perspective assembly view of the suction device provided in the third embodiment;

fig. 8 is a perspective combination schematic view of a suction device provided in the fourth embodiment;

fig. 9 is a perspective combination schematic view of a suction device provided in the fifth embodiment.

The reference numerals in the detailed description illustrate:

face mask	1	Flexible annular cushion	11
				First connecting cylinder	12	Cover body	13
Connecting piece	2	Lower connecting cylinder	21
				Upper connecting cylinder	22	Vent hole	23
Basal disc	24	Display device	25
				Air pressure sensor	26	Inner one-way valve	27
External one-way valve	28	Shell body	3
				Open mouth	31	Hole of stepping down	32
Exhaust port	33	Piston rod	4
				Crown head	41	Push-pull rod	42
Piston	43	First seal ring	44
				Second sealing ring	45	Negative pressure generator	5

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example one

The present embodiments provide a suction device for airway obstructions. Referring to fig. 1, fig. 1 is a perspective combination schematic view of a suction device provided in this embodiment, in order to more clearly illustrate an internal structure of the suction device, a casing 3 is processed in a perspective manner in fig. 1, as shown in fig. 1, the suction device includes a negative pressure generator 5 and a face mask 1, and the face mask 1 is communicated with the negative pressure generator 5 through a connecting member 2. The negative pressure generator 5 comprises a shell 3 and a piston rod 4 movably inserted into the shell 3, wherein an axially through cavity is formed in the shell 3, a yielding hole 32 communicated with the cavity is formed in the upper end of the shell 3, an open port 31 communicated with the cavity is formed in the lower end of the shell, the piston rod 4 comprises a push-pull rod 42 and a piston 43 fixedly sleeved on the push-pull rod 42, the upper end of the push-pull rod 42 penetrates out of the yielding hole 32, and the outer side face of the piston 43 is movably and hermetically connected with the inner side face of the shell 3 through a sealing ring. Referring to fig. 2, fig. 2 is a schematic exploded perspective view of the suction device provided in the present embodiment, and as shown in fig. 2, the upper side of the mask 1 is provided with a first connecting cylinder 12 therethrough, and the lower side is provided with a flexible annular cushion 11 for fitting with the face. In this embodiment, the mask 1 is composed of and only of a hollow mask body 13, the first connecting cylinder 12 and the flexible annular cushion 11; the cover body 13 is connected to the lower end of the first connecting cylinder 12, and the flexible annular pad 11 is disposed at the lower side edge of the cover body 13. In the present embodiment, the upper side of the connecting element 2 is hermetically connected to the open opening 31, and specifically, referring to fig. 2, the connecting element 2 includes a base plate 24, the upper side of the base plate 24 is provided with a hollow upper connecting cylinder 22, the upper connecting cylinder 22 is inserted into the open opening 31, and the outer side of the upper connecting cylinder 22 is hermetically connected to the inner side of the open opening 31 (refer to fig. 1). In the present embodiment, the lower side of the connecting member 2 is hermetically connected to the first connecting cylinder 12, and specifically, referring to fig. 2, the lower side of the base plate 24 is provided with a hollow lower connecting cylinder 21, the first connecting cylinder 12 is inserted into the lower connecting cylinder 21, and the outer side of the first connecting cylinder 12 is hermetically connected to the inner side of the lower connecting cylinder 21 (see fig. 1). With continued reference to fig. 2, a plurality of through-holes 23 are provided in the base plate 24 to allow communication between the upper connector cylinder 22 and the lower connector cylinder 21.

The use method of the suction device for assisting the suffocation patient rescue comprises the following steps:

s1, pushing and pressing a piston rod 4 to the bottommost end;

step S2, the flexible annular cushion 11 of the mask 1 surrounds the mouth of the suffocation patient and is tightly attached to the face (see figure 3);

step S3, then holding the face mask 1 by one hand to keep the seal between the face mask 1 and the face, and rapidly drawing the piston rod 4 upwards by the other hand to form vacuum suction in the cavity of the shell 3 (see figure 4);

s4, quickly pulling up the whole suction device by a hand which originally holds the mask 1 to release the vacuum suction in the suction device (see figure 5);

step S5, after the face mask 1 is completely separated from the face, the piston rod 4 is pushed to the bottommost end again, and air and foreign matters in the shell 3 are discharged;

repeating the steps S2 to S5 until the obstruction in the respiratory tract of the asphyxia patient is extracted.

In summary, compared with the prior art, the suction device and the using method thereof provided by the embodiment can at least achieve the following beneficial effects:

1. the utility model can effectively assist the suffocation patient in a simpler and labor-saving way under the condition that the elastic throat pipe is not required to be inserted into the respiratory tract of the suffocation patient.

2. The suction device of the embodiment removes/omits the elastic throat, avoids the asphyxia patient from generating the sense of fear of claustrophobic space, and fundamentally avoids the discomfort caused by inserting the elastic throat into the respiratory tract, the fear in the mind of the user and the potential safety hazard caused by inserting the elastic throat into the respiratory tract. Furthermore, the removal/omission of the resilient throat makes the suction device of the present invention safer for use in rescuing children. In addition, the restraint of the elastic throat pipe on the placement of the mask 1 is completely eliminated, and the perfect fit between the mask 1 and the face can be ensured.

3. In the process of operating the suction device according to the use method of the embodiment, after the flexible annular cushion 11 of the mask 1 surrounds the mouth of the suffocation patient and is tightly attached to the face, one hand holds the mask 1 to keep the seal between the mask 1 and the face, the other hand rapidly pulls the piston rod 4 upwards, so that strong vacuum suction can be formed in the cavity of the shell 3, then the hand which originally holds the mask 1 is rapidly lifted to release negative pressure to form strong suction force on the respiratory tract, and the piston rod 4 is pushed to the bottom to discharge air in the shell 3 and discharge foreign matters inside. The method of use of the present invention allows a strong negative pressure to be created within the housing 3 without the need to repeatedly pull the plunger rod 4. Because of no restriction of the elastic throat, the arm power path can be maximized when the rescuer pulls the piston rod 4 every time, so that sufficient negative pressure is generated in the suction device, and sufficient vacuum suction is formed, so that the blockage can be smoothly pulled out.

4. In the process of operating the suction device according to the using method of the embodiment, the piston rod 4 is pushed to the bottom to discharge the air in the shell 3 and simultaneously discharge the foreign matters in the shell, so that the risk of backflow of the foreign matters is avoided, and the vent hole 23 in the connecting piece 2 is larger than the air outlet end opening of the duckbill valve in size, so that the situation of blockage is not easy to occur. In addition, a material collecting container is omitted, the size of the shell is convenient to increase, the amount of air in the cavity of the shell 3 is increased, negative pressure capable of being formed during single drawing is increased, larger vacuum suction force is generated, and a better first-aid effect is achieved.

Of course, in some other embodiments, the flexible annular cushion 11 of the mask 1 may also be placed around the mouth and nose of the suffocation patient and in close proximity to the face during said step S2.

In this embodiment, in the step S1, when the piston rod 4 is pushed to the lowermost end, the piston 43 abuts on the joint 2.

Of course, in some other embodiments, when the piston rod 4 is pushed to the lowermost end in step S1, the lower side of the crown 41 abuts against the end surface of the relief hole 32.

Further, referring to fig. 2, an upper end of the housing 3 is further provided with an exhaust port 33 communicating with the cavity. In this way, in the process that the piston rod 4 of the drawing device is drawn and moved upwards, the gas in the cavity of the housing 3 can be rapidly released from the exhaust port 33, so that the rescuer can more smoothly draw the piston rod 4 upwards.

Further, referring to fig. 2, the negative pressure generator 5 further includes a first sealing ring 44 and a second sealing ring 45 which are sleeved outside the piston 43, so that the air tightness between the piston 43 and the housing 3 can be improved. Here, the center of the second sealing ring 45 and the center of the first sealing ring 44 both fall on the central axis of the piston 43, and the piston 43 is connected to the housing 3 via the first sealing ring 44 and the second sealing ring 45. Specifically, an inner side surface of the first sealing ring 44 is in sealing connection with an outer side surface of the piston 43, and an outer side surface of the first sealing ring 44 is in movable sealing connection with an inner side surface of the housing 3; the inner side surface of the second sealing ring 45 is connected with the outer side surface of the piston 43 in a sealing manner, and the outer side surface of the second sealing ring 45 is movably connected with the inner side surface of the shell 3 in a sealing manner. While a gap remains practically between the outer side of the piston 43 and the inner side of the housing 3.

Further, referring to fig. 2, a crown 41 for the rescuer to hold is further installed on the top of the push-pull rod 42, thereby further improving the operational convenience of the drawing device.

Further, the mask 1 is detachably connected to the connection member 2 so that the mask having different shapes and sizes can be replaced according to the rescue object.

Example two

The present embodiment provides a suction device for airway obstruction, which is different from the suction device in the first embodiment in that: referring to fig. 6, fig. 6 is a perspective assembly view of the suction device provided in this embodiment, and in fig. 6, it can be seen that the cover 13 has a hemispherical shape, the lower edge of the cover 13 has a circular shape, and the flexible annular pad 11 has a circular shape. The cover 13 having a hemispherical shape is adapted to the shape of the face of an animal so that the suction device can be used for rescuing animals (cats or dogs) suffering from asphyxia due to airway obstruction.

EXAMPLE III

The present embodiment provides a suction device for airway obstruction, which is different from the suction device in the first embodiment in that: referring to fig. 7, fig. 7 is a perspective assembly view of the suction device provided in this embodiment, and as can be seen in fig. 7, the suction device further includes an air pressure sensor 26 and a display 25 electrically connected to the air pressure sensor 26, the display 25 is installed on the outer side of the housing 3, and the air pressure sensor 26 is disposed in the connecting member 2. The air pressure sensor 26 can measure the negative pressure in the suction device, and the display 25 displays the measurement result, so that the rescuer can control the drawing force according to the value displayed by the display 25 so as to suffocate patients under different conditions.

It should be noted that the air pressure sensor 26 is installed in the lower connecting cylinder 21 of the connecting member 2, so that the air pressure sensor 26 can not only detect the negative pressure in the housing 3, but also prevent the air pressure sensor 26 from obstructing the movement of the piston rod 4.

Example four

The present embodiment provides a suction device for airway obstruction, which is different from the suction device in the first embodiment in that: referring to fig. 8, fig. 8 is a perspective assembly view of the suction device provided in this embodiment, and it can be seen in fig. 8 that the central axis of the lower connecting cylinder 21 forms an angle with the central axis of the upper connecting cylinder 22. Therefore, in the process of using the suction device, the piston rod 4 does not need to be vertically pulled upwards, but the piston rod 4 is pulled upwards in an inclined mode, and therefore force is applied to rescuers with low heights.

EXAMPLE five

The present embodiment provides a suction device for airway obstruction, which is different from the suction device in the first embodiment in that: the structure of the connecting element 2 is different. Specifically, referring to fig. 9, the connecting element 2 is further provided with an opening hole, the opening hole penetrates through the base plate 24, the lower end of the opening hole is communicated with the outside, an external check valve 28 is arranged in the opening hole, and the external check valve 28 can allow the gas in the housing 3 to flow out to the outside. The vent hole 23 is a circular through hole, an inner check valve 27 is arranged in the vent hole 23, and the inner check valve 27 can allow air to flow into the cavity of the shell 3. The upper and lower connector barrels 22, 21 of the connector 2 are still connected to the open mouth 31 of the housing 3 and the first connector barrel 12 of the mask 1, respectively. When the piston rod 4 is drawn upwards, the inner check valve 27 in the vent hole 23 allows gas on the mask 1 side to flow into the housing 3. When the piston rod 4 is pushed downwards, the outer check valve 28 in the opening hole can allow the gas in the cavity of the housing 3 to flow out to the outside, so as to rapidly discharge the gas in the housing 3.

While the embodiments of the invention have been described in connection with the drawings, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than restrictive, and many modifications may be made by one skilled in the art without departing from the spirit of the invention and the scope of the appended claims.

Claims (20)

1. A suction device for airway obstructions, characterized in that it comprises a negative pressure generator (5) and a mask (1), said mask (1) being in communication with said negative pressure generator (5) through a connection (2); the negative pressure generator (5) comprises a shell (3) and a piston rod (4) movably inserted into the shell (3), an axially-through cavity is formed in the shell (3), a yielding hole (32) communicated with the cavity is formed in the upper end of the shell (3), an open port (31) communicated with the cavity is formed in the lower end of the shell, the piston rod (4) comprises a push-pull rod (42) and a piston (43) fixedly sleeved on the push-pull rod (42), the upper end of the push-pull rod (42) penetrates out of the yielding hole (32), and the outer side face of the piston (43) is movably and hermetically connected with the inner side face of the shell (3) through a sealing ring; the upper side of the face mask (1) is provided with a first through connecting tube (12), and the lower side of the face mask is provided with a flexible annular cushion (11) which is used for being attached to the face; the upper side of the connecting piece (2) is connected with the open opening (31) in a sealing way, and the lower side of the connecting piece is connected with the first connecting cylinder (12) in a sealing way.

2. The airway obstruction suction device according to claim 1, wherein the connecting member (2) comprises a base plate (24), the upper side of the base plate (24) is provided with a hollow upper connecting cylinder (22), the upper connecting cylinder (22) is inserted into the open opening (31), and the outer side of the upper connecting cylinder (22) is connected with the inner side of the open opening (31) in a sealing manner.

3. The aspiration device of airway obstruction according to claim 1, characterized in that the connector (2) comprises a base plate (24), the lower side of the base plate (24) is provided with a hollow lower connector barrel (21), the first connector barrel (12) is inserted into the lower connector barrel (21), the outer side of the first connector barrel (12) is connected with the inner side of the lower connector barrel (21) in a sealing way.

4. The device for suctioning airway obstructions according to claim 2 or 3, wherein the base plate (24) is provided with a through vent (23).

5. The aspiration device of airway obstruction according to claim 1, characterized in that the connector (2) comprises a base disc (24); a hollow upper connecting cylinder (22) is arranged on the upper side of the base plate (24), the upper connecting cylinder (22) is inserted into the open opening (31), and the outer side of the upper connecting cylinder (22) is hermetically connected with the inner side of the open opening (31); a hollow lower connecting cylinder (21) is arranged on the lower side of the base plate (24), the first connecting cylinder (12) is inserted into the lower connecting cylinder (21), and the outer side of the first connecting cylinder (12) is connected with the inner side of the lower connecting cylinder (21) in a sealing manner; the central axis of the lower connecting cylinder (21) and the central axis of the upper connecting cylinder (22) form a certain included angle.

6. The device for suctioning airway obstructions according to claim 1, characterized in that the mask (1) is constituted by and only by a hollow mask body (13), the first connecting cartridge (12) and the flexible annular cushion (11); the cover body (13) is connected to the lower end of the first connecting cylinder (12), and the flexible annular pad (11) is arranged on the edge of the lower side of the cover body (13).

7. The airway obstruction suction device according to claim 1, wherein the mask (13) has a hemispherical shape, the lower edge of the mask (13) has a circular shape, and the flexible annular pad (11) has a circular shape.

8. The device for suctioning airway obstructions according to claim 1, further comprising a pressure sensor (26) and a display (25) electrically connected to the pressure sensor (26), wherein the display (25) is mounted on the outside of the housing (3), and wherein the pressure sensor (26) is disposed in the connector (2).

9. Use of a suction device according to any of claims 1-8, characterized in that it comprises the following steps:

s1, pushing and pressing a piston rod (4) to the bottommost end;

s2, surrounding the mouth of the suffocation patient by a flexible annular cushion (11) of the mask (1) and tightly attaching the mouth to the face of the suffocation patient;

s3, holding the mask (1) by one hand to keep the seal between the mask (1) and the face, and rapidly drawing the piston rod (4) upwards by the other hand to form vacuum suction in the cavity of the shell (3);

s4, quickly pulling up the whole suction device by a hand which originally holds the mask (1) to release the vacuum suction inside;

s5, after the face mask (1) is completely separated from the face, the piston rod (4) is pushed to the bottommost end again, and air and foreign matters in the shell (3) are discharged;

repeating the steps S2 to S5 until the obstruction in the respiratory tract of the asphyxia patient is extracted.

10. Use according to claim 9, characterized in that in said step S2, the flexible annular cushion (11) of the mask (1) is brought to surround the mouth and nose of the suffocating patient and to fit closely to the face.

11. Method of use according to claim 9, wherein in step S1, the piston (43) abuts the connection piece (2) when the piston rod (4) is pushed to the lowermost end.

12. The use method according to claim 9, wherein the top of the push-pull rod (42) is further provided with a handle head (41) for holding by a rescuer; in step S1, when the piston rod (4) is pushed to the lowermost end, the lower side of the crown (41) abuts against the end surface of the relief hole (32).

13. A suction device for airway obstructions, characterized in that it comprises a negative pressure generator (5) and a mask (1), said mask (1) being in communication with said negative pressure generator (5) through a connection (2); the negative pressure generator (5) comprises a shell (3) and a piston rod (4) movably inserted into the shell (3), wherein an axially through cavity is formed in the shell (3), a yielding hole (32) communicated with the cavity is formed in the upper end of the shell (3), an opening (31) communicated with the cavity is formed in the lower end of the shell, the piston rod (4) comprises a push-pull rod (42) and a piston (43) fixedly sleeved on the push-pull rod (42), the upper end of the push-pull rod (42) penetrates out of the yielding hole (32), a first sealing ring (44) is sleeved on the outer side surface of the piston (43), the inner side surface of the first sealing ring (44) is in sealing connection with the outer side surface of the piston (43), and the outer side surface of the first sealing ring (44) is in movable sealing connection with the inner side surface of the shell (3); the upper side of the face mask (1) is provided with a first through connecting tube (12), and the lower side of the face mask is provided with a flexible annular cushion (11) which is used for being attached to the face; the upper side of the connecting piece (2) is connected with the open opening (31) in a sealing way, and the lower side of the connecting piece is connected with the first connecting cylinder (12) in a sealing way.

14. The aspiration device of airway obstructions according to claim 13, characterized in that the piston (43) is externally sheathed with a second sealing ring (45), the second sealing ring (45) and the first sealing ring (44) both having their centers on the central axis of the piston (43); the inner side surface of the second sealing ring (45) is connected with the outer side surface of the piston (43) in a sealing mode, and the outer side surface of the second sealing ring (45) is movably connected with the inner side surface of the shell (3) in a sealing mode.

15. The aspiration device of airway obstruction according to claim 13, characterized in that the connecting piece (2) comprises a base disc (24), the upper side of the base disc (24) is provided with a hollow upper connecting cylinder (22), the upper connecting cylinder (22) is inserted into the open mouth (31), the outer side of the upper connecting cylinder (22) is connected with the inner side of the open mouth (31) in a sealing way; the lower side of the base plate (24) is provided with a hollow lower connecting cylinder (21), the first connecting cylinder (12) is inserted into the lower connecting cylinder (21), and the outer side of the first connecting cylinder (12) is connected with the inner side of the lower connecting cylinder (21) in a sealing mode.

16. The device for sucking the airway obstruction according to claim 15, wherein the connecting piece (2) is further provided with an open hole, the open hole penetrates through the base plate (24), the lower end of the open hole is communicated with the outside, an outer one-way valve (28) is arranged in the open hole, and the outer one-way valve (28) can allow the gas in the shell (3) of the connecting piece (2) to flow out to the outside.

17. The aspiration device of airway obstruction according to claim 13, characterized in that the top of the push-pull rod (42) is further mounted with a handle (41) for the rescuer to hold.

18. The airway obstruction suction device according to claim 13, wherein the upper end of the housing (3) is further provided with an air outlet (33) communicating with the cavity.

19. The airway-obstruction suctioning device of claim 18, wherein when the piston moves toward the lower end of the housing, air within the housing enters the connector through the upper connector and exits the mask through the vent and the lower connector; when the piston moves towards the upper end of the shell, air in the shell flows to the outside from the abdicating hole and the exhaust port.

20. The device for suctioning airway obstructions according to claim 13, wherein the mask (1) is removably connected to the connector (2) to facilitate the replacement of different shapes and sizes of the mask according to the rescue objective.

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