WO2016119561A1

WO2016119561A1 - Respirator and airway aid thereof

Info

Publication number: WO2016119561A1
Application number: PCT/CN2015/099890
Authority: WO
Inventors: 邹栋; 吴本清; 贺百元; 王润生
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2015-01-29
Filing date: 2015-12-30
Publication date: 2016-08-04
Also published as: CN104667398A; CN104667398B

Abstract

An airway aid （100） comprises a nasal tube （110） and a pressure monitor （120）. One end of the nasal tube （110） is an inhaling end （111）, and the other end thereof is an exhaling end （112）; a nasal entry（113） is provided between the inhaling end （111） and the exhaling end （112）, the nasal entry （113）being used for connecting with the nasal cavity of a patient to input gas into an airway (136). The pressure monitor (120) is disposed at the inhaling end (111) and comprises a connector (121) and a sampling tube (122); one end of the sampling tube (122) is connected with the connector (121), and the connector (121) is connected with the inhaling end (111); the sampling tube (122) is accommodated in the inhaling end (111) of the nasal tube (110),and the tail end (123) of the sampling tube (122) is close to the nasal entry (113). A respirator comprises the airway aid (100). Since the tail end (123) of the sampling tube (122) is close to the nasal entry (113), the pressure monitor (120) can measure the pressure of the adnasal end, the pressure being closer to the actual pressure of the airway of the patient, and the influence of resistance of the inner cavity of the nasal tube and a respiratory line upon pressure sampling results of the sampling tube (122) is avoided, so that precise measurement is achieved, and medical staff can know in time the inhaling airway pressure of the patient.

Description

Ventilator and its airway auxiliary device

[Technical Field]

The present invention relates to medical devices, and more particularly to a ventilator and an airway assisting device thereof.

【Background technique】

Current neonatal intensive care unit NICU (neonatal intensive care) Unit) Respiratory ventilation is the main ventilation method with intubation mechanical ventilation and nasal noninvasive ventilation. Because intubation mechanical ventilation treatment has more complications for neonates and premature infants, nasal non-invasive positive airway pressure is more and more respected. Clinical neonatal respiratory distress syndrome NRDS (neonatal respiratory distress syndrome) compared with conventional ventilation therapy is nasal CPAP (Continuous Positive Airway Pressure) Ventilation therapy. At present, there are two ways to produce continuous positive airway pressure. One is to adjust the exhalation valve to generate airway pressure. The common is the water-sealed positive end expiratory pressure device and the mechanical knob type. Pressure valve device. However, the water-sealed end-expiratory positive pressure device and the mechanical knob-type end-expiratory positive pressure valve device cannot accurately measure the airflow pressure in the airway device, thereby failing to meet the increasingly high clinical requirements.

[Summary of the Invention]

Based on this, it is necessary to provide a ventilator and an airway assisting device capable of accurately measuring the true pressure value in the patient's airway.

An airway auxiliary device includes a nasal tube and a pressure monitoring member, wherein one end of the nasal tube is an air inlet end, and the other end is an air outlet end, and a nose portion is disposed between the air inlet end and the air outlet end. The nose is used to connect the patient's nasal cavity to input gas into the airway;

The pressure monitoring member is disposed at the intake end, the pressure monitoring member includes a connector and a sampling tube, and one end of the sampling tube is connected to the connector, and the connector is connected to the air inlet. The sampling tube is received in an intake end of the nasal tube, and the other end of the sampling tube is adjacent to the nose.

In one embodiment, the nose portion includes a body and two nasal conduits on the body, the nasal conduits for receiving within the nose, the nasal conduits being curved.

In one of the embodiments, the body is provided with a curved concave surface for recessing toward the nose.

In one embodiment, the connector includes a tube body, a sampling tube connection port, and a tapered surface, the diameter of the sampling tube connection port is smaller than the diameter of the tube body, and the tapered surface is connected to the sampling tube The connection port is connected to the tube body, and the sampling tube connection port is received in the nasal tube, and the tapered surface seals the nasal tube.

In one embodiment, the connector further includes a monitoring connection port for connecting to the air pressure monitor, the monitoring connection port being disposed on an outer sidewall of the tube body.

In one embodiment, a pressure generator is further included, the pressure generator is disposed at the gas outlet end, and the pressure generator has a pore diameter smaller than an aperture of the gas outlet end.

In one embodiment, the end of the pressure generator near the air outlet end of the nasal tube is a first connection end, the first connection end is tapered, and the first connection end is sealed with the air outlet end. .

In one embodiment, an anti-blocking tube is further included, and the other end of the pressure generator is a second connecting end, and the anti-blocking tube is sealingly connected to the second connecting end.

In one embodiment, the anti-blocking tube is a telescopic tube, and exhaust holes are formed in sidewalls of both ends of the anti-blocking tube.

A ventilator includes the above airway auxiliary device, a gas pressure monitor, and a flow controller. The air pressure monitor collects a gas pressure value in the nasal tube close to the nose portion through the collecting tube, and feeds back the air pressure value to the flow controller, and the flow controller controls the output fresh according to the air pressure value. Gas flow.

In the ventilator containing the above airway assisting device, the end of the sampling tube is close to the nose, and the pressure monitoring member can measure the pressure near the nose, closer to the actual pressure of the patient near the nose, and avoid the nasal canal and The resistance of the breathing circuit affects the sampling tube sampling airway pressure value results, so as to achieve accurate measurement. It is convenient for medical staff to know the airway pressure inhaled by the patient in time to meet the clinical needs.

[Description of the Drawings]

Figure 1 is a perspective structural view of an airway assisting device of the present embodiment;

Figure 2 is a gas flow diagram of the airway assisting device shown in Figure 1;

Figure 3 is a cross-sectional view of the nasal cannula of the airway assisting device shown in Figure 1;

Figure 4 is a schematic cross-sectional view of the nasal tube shown in Figure 3;

Figure 5 is a cross-sectional view of the nasal portion of the nasal tube shown in Figure 3;

Figure 6 is a perspective view of the pressure monitoring member of the nasal cannula of the airway assisting device shown in Figure 1;

Figure 7 is a perspective view of the pressure generator of the nasal cannula of the airway assisting device shown in Figure 1;

Figure 8 is a cross-sectional view of the pressure generator shown in Figure 7;

Fig. 9 is a partial enlarged view of a portion A of the air passage assisting device shown in Fig. 1.

【detailed description】

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

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, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

The ventilator (not shown) of the present embodiment includes an airway auxiliary device, a gas pressure monitor (not shown), and a flow controller (not shown). The air pressure monitor obtains the air pressure value in the nasal tube close to the nose through the collecting tube, and feeds the air pressure value to the flow controller, and the flow controller controls the output of the fresh gas flow according to the air pressure value. The ventilator is used in the neonatal intensive care unit and is installed on or near the nursery box to provide nasal continuous airway ventilation for the newborn.

Referring to FIGS. 1 and 2 , the airway assisting device 100 of the present embodiment includes a nasal tube 110 , a pressure monitoring member 120 , and a pressure generator 130 . Referring to FIG. 3, one end of the nasal tube 110 is an air inlet end 111, and the other end is an air outlet end 112. A nose portion 113 is provided between the intake end 111 and the air outlet end 112. The nose 113 is used to connect the patient's nasal cavity to introduce gas into the patient's airway. The fresh gas outlet is for discharging fresh air, the fresh gas enters from the inlet end 111, the fresh gas passes through the nose 113 into the airway of the patient, and the patient exhales carbon dioxide, and the carbon dioxide gas is discharged from the outlet end 112 to the atmosphere.

Referring to FIG. 4, the nose portion 113 includes a body and two nasal conduits 115 on the body 114. The nasal cannula 115 is housed in the nose. The nasal cannula 115 is curved. Two nasal cannulas 115 extend into the nostrils of the patient, respectively. The nasal cannula 115 is designed to be curved in accordance with the anatomical structure of the human body, and can reduce the damage of the nasal canal 115 to the internal tissue of the nasal cavity.

Specifically, in the present embodiment, the distance between the two nasal cannulas 115 of the nasal tube 110 is divided into a plurality of specifications according to the size of the nasal septum and the nostrils. For patients of different ages, a nasal tube 110 of a suitable size is selected. Avoid too much or too little distance between the two nasal cannulas 115, damage the patient's nasal cavity and increase discomfort.

Referring to Figure 5, the body 114 is provided with a curved concave surface 116 that is recessed adjacent one side of the nose. When the two nasal cannulas 115 are inserted into the nostrils, the curved concave surface 116 abuts the nasal post of the nose (i.e., between the nose and the person). The curved concave surface 116 abuts against the patient's nasal column, and the curved concave surface 116 is designed to be ergonomically designed to avoid compression of the nose.

Specifically, in the present embodiment, the nasal tube 110 is a silicone tube. The nasal tube 110 is a round tube. The nasal tube 110 is made of medical grade soft silicone, the nasal tube 110 has a low hardness, and the nasal tube 110 has a rounded shape. Therefore, the nasal tube 110 is made of a soft silicone material, which is easy to install for clinical use and has nasal damage to the child. Small, more in line with the clinical use needs of the neonatal intensive care unit NICU, can reduce the facial damage of the nasal canal 110 to patients, especially newborns.

Referring to FIG. 6 , the pressure monitoring component 120 is disposed at the intake end 111 . The pressure monitoring component 120 includes a connector 121 and a sampling tube 122 . One end of the sampling tube 122 is connected to the connector 121 , and the connector 121 is connected to the air inlet 111 . The sampling tube 122 is housed in the nasal tube 110, and the distal end 123 of the sampling tube 122 is adjacent to the nose portion 113. The sampling tube 122 extends into the nasal tube 110 and is adjacent to the position of the nose portion 113. This prevents the sampling tube 122 from being exposed and wraps, and the end of the sampling tube 122 can be sampled closer to the nose portion 113. The patient's airway pressure can be measured more accurately than in the conventional manner, so that the medical staff can timely understand the airway pressure of the patient in the nasal canal 110 of the respiratory assist device 100.

The connector 121 includes a tube 124 that is not visible in the drawing, a sampling tube connection port 125, and a tapered surface 126. The diameter of the sampling tube connection port 125 is smaller than the diameter of the tube body, the tapered surface 126 is connected to the sampling tube connection port 125 and the tube body, the sampling tube connection port 125 is received in the nasal tube 110, and the tapered surface 126 seals the nasal tube 110.

The connector 121 also includes a monitoring connection port 127 for connecting to the air pressure monitor, and the monitoring connection port 127 is disposed on the outer side wall of the tube body 124. The sampling tube 122 transmits the air pressure in the nasal tube 110 close to the nose 113 to the air pressure monitor at the monitoring connection port 127, so that the air pressure monitor obtains the air pressure value at the patient's near nose, which is closer to the actual airway of the patient. The pressure value is safer and more reliable for clinical use.

The air pressure monitor feeds back the measured pressure value to the flow controller, and the flow controller compares the pressure value with the set pressure value, thereby controlling the flow controller of the ventilator to control the output of the fresh gas flow, thereby achieving Control the pressure to achieve high precision control of the patient's airway pressure. The ventilator can adjust the air pressure in the pipeline of the nasal tube 110 in time, and the ventilator can maintain the proper pressure in the pipeline of the respiratory assist device 100, thereby effectively avoiding the uncomfortable feeling caused by the improper air pressure.

Referring to FIGS. 1 and 7, the pressure generator 130 is disposed at the air outlet end 112, and the aperture of the pressure generator 130 is smaller than the aperture of the air outlet end 112. One end of the pressure generator 130 near the outlet end 112 of the nasal tube 110 is a first connection end 131 and the other end is a second connection end 132. Referring to FIG. 7 , the first connecting end 131 is tapered, and the first connecting end 131 is sealingly connected to the air outlet end 112 . A bent portion 134 is provided at the port of the second connecting end 132. A pressing portion 133 is formed between the first connecting end 131 and the second connecting end 132, and the first connecting end 131, the second connecting end 132, and the pressing portion 133 are penetrated. The first connecting end 131 and the second connecting end 132 are provided with an air passage 136, and the pressing portion 133 is provided with a pressing passage 135. The diameter of the pressing passage 135 is smaller than the air passages of the first connecting end 131 and the second connecting end 132. 136. Therefore, the gas is passed through the pressurizing passage 135, and the resistance is large, so that the inside of the pipe of the nasal tube 110 is pressurized.

Specifically, in the present embodiment, the pressure passage 135 has a diameter of 2-4 mm, and the pressure passage 135 has a length of 4-8 mm. The pressure generator 130 acts to pressurize the air pressure inside the nasal tube 110, so that the pressure and flow rate in the nasal tube 110 meet the medical use requirements.

Referring to FIG. 1 , the air passage 136 assisting device 100 of the present embodiment further includes an anti-blocking tube 140 , and the anti-blocking tube 140 is sealingly connected to the second connecting end 132 . The second connecting end 132 is received in the anti-blocking tube 140, and the bent portion 134 is tightly connected to the inner side wall of the anti-blocking tube 140 to seal the return portion 134 with the anti-blocking tube 140. Referring to FIG. 8 , in the embodiment, the cross-section of the curved portion 134 is a right-angled trapezoid, and the end surface of the curved portion 134 is provided with a slope 134a for guiding, so that the second connecting end 132 can be smoothly prevented. Block the tube 140.

Referring to FIG. 9, a vent hole 141 is defined in a sidewall of the anti-blocking tube 140. The two ends of the anti-blocking tube 140 are provided with a plurality of exhaust holes 141. When the outlet of the anti-blocking tube 140 is blocked or the anti-blocking tube 140 is pressed, the expiratory airflow can still be discharged through the exhaust hole 141 to protect the patient from ventilation.

The anti-blocking tube 140 is a telescopic tube. Specifically, in the present embodiment, the anti-blocking tube 140 is a threaded tube.

The anti-blocking tube 140 is designed according to the principle of preventing single failure, and is safe and reliable. Moreover, when the anti-blocking tube 140 is used in the nursery box, the anti-blocking tube 140 can discharge the gas and the water vapor to the outside of the nursery box to prevent the nursery box from getting wet.

Moreover, the airway assisting device 100 can achieve not only a single level continuous positive pressure ventilation CPAP (Continuous Positive) Airway Pressure) and can achieve bi-level positive pressure ventilation CPAP ventilation, and the airway assisting device 100 only needs a single nasal tube 110 to connect, in clinical use, reducing the complexity of the pipeline connection and the cost of use.

Moreover, the airway assisting device 100 has the characteristics of simple structure and low clinical use cost compared with the conventional pressure generator which generates the continuous positive air flow by using the injection principle and the Coanda effect. Moreover, the airway assisting device 100 is fixedly mounted in a simple manner and does not cause nasal damage to the newborn. Therefore, the airway assisting device 100 has a low cost, accurate airway pressure measurement, simple installation, small nasal damage to the newborn, and double-level CPAP.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An airway auxiliary device, comprising: a nasal tube and a pressure monitoring member, wherein one end of the nasal tube is an intake end, and the other end is an air outlet end, and the air inlet end and the air outlet end are disposed between the air inlet end and the air outlet end Into the nose, the nose is used to connect the patient's nasal cavity to input gas into the airway;

The pressure monitoring member is disposed at the intake end, the pressure monitoring member includes a connector and a sampling tube, and one end of the sampling tube is connected to the connector, and the connector is connected to the air inlet. The sampling tube is received in an intake end of the nasal tube, and the other end of the sampling tube is adjacent to the nose.
The airway assisting device according to claim 1, wherein the nasal passage portion includes a body and two nasal conduits on the body, the nasal conduits for receiving in the nasal cavity, The nasal cannula is curved.
The airway assist device according to claim 2, wherein the body is provided with a curved concave surface for recessing toward the nose.
The air passage auxiliary device according to claim 1, wherein the connecting head comprises a pipe body, a sampling pipe connecting port and a tapered surface, and a diameter of the sampling pipe connecting port is smaller than a diameter of the pipe body, The tapered surface connects the sampling tube connection port and the tube body, and the sampling tube connection port is received in the nasal tube, and the tapered surface seals the nasal tube.
The airway assisting device according to claim 4, wherein said connector further comprises a monitoring connection port for connecting to the air pressure monitor, said monitoring connection port being provided on an outer side wall of said tube body.
The airway assisting device according to claim 1, further comprising a pressure generator, said pressure generator being disposed at said air outlet end, said pressure generator having a smaller aperture than said air outlet end.
The airway assisting device according to claim 6, wherein one end of the pressure generator near the air outlet end of the nasal tube is a first connecting end, and the first connecting end is tapered, the first The connecting end is sealingly connected to the air outlet end.
The airway assisting device according to claim 7, further comprising an anti-blocking tube, wherein the other end of the pressure generator is a second connecting end, and the anti-blocking tube is sealingly connected to the second connecting end .
The airway assisting device according to claim 8, wherein the anti-blocking tube is a telescopic tube, and exhaust holes are formed in sidewalls of both ends of the anti-blocking tube.
A ventilator, comprising the airway auxiliary device according to any one of claims 1-9, a gas pressure monitor, and a flow controller, wherein the air pressure monitor is collected into the nasal tube through the collecting tube The air pressure value near the nose is fed back to the flow controller, and the flow controller is configured to control the output fresh gas flow rate according to the air pressure value.