CN112057279A

CN112057279A - Noninvasive ventilator hood

Info

Publication number: CN112057279A
Application number: CN202010980896.XA
Authority: CN
Inventors: 王昊; 韩辉
Original assignee: Qilu Hospital of Shandong University
Current assignee: Qilu Hospital of Shandong University
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-12-11

Abstract

The noninvasive ventilator hood of the invention comprises a support ring, a hood part and a neck sleeve part, wherein a cavity is arranged in the hood part; the center of the neck sleeve part is provided with a sleeve hole; be provided with pressure regulating valve, breathing relief valve and breathing machine on the hood portion and connect, be provided with the water conservancy diversion curtain on the inner wall on upper portion in the hood portion, form the water conservancy diversion chamber between the inner wall of water conservancy diversion curtain and hood portion, the upper end in water conservancy diversion chamber is linked together with the breathing machine connects, and the lower extreme in water conservancy diversion chamber is the gas outlet, and the gas outlet is located patient's nostril position department. The noninvasive ventilator hood disclosed by the invention ensures that the inner cavity of the hood part is in a positive-pressure oxygen environment, and is beneficial to realizing oxygen pressure treatment on patients with lung diseases; pressure regulating valve has realized the regulation to the oxygen pressure in the head cover portion, and when negative pressure appeared in head cover portion inner chamber, the relief valve of breathing then communicates head cover portion and external environment, avoids appearing stifling, has ensured patient's safety.

Description

Noninvasive ventilator hood

Technical Field

The invention relates to a noninvasive ventilator hood, in particular to a noninvasive ventilator hood capable of forming an air curtain type oxygen supply at the mouth and nose parts of a patient.

Background

Severe respiratory distress syndrome can be caused by pneumonia, pulmonary contusion, severe systemic infection, shock, high-risk operation and the like, invasive mechanical ventilation is a main method for treating severe respiratory distress syndrome at present, but the mechanical ventilation is difficult to change the hypoxia phenomenon of a patient due to atelectasis of the lung of the patient. At present, positive pressure oxygen therapy for patients with lung diseases is studied, and the head area of the patient is placed in an oxygen environment with pressure higher than the external atmospheric pressure, so that the oxygen pressure in the lung of the patient is increased as much as possible, and the aim of effectively and rapidly treating the lung diseases of the patient is fulfilled.

The hood is an effective device for placing the head area of a patient in a positive pressure oxygen environment, if a hood mode is adopted to treat patients with lung diseases, firstly, the problem to be solved is to ensure that the pressure in the hood can be regulated according to the requirements and pressure resistance characteristics of different patients, secondly, the absolute safety is ensured, and when the respirator breaks down and does not supply air, the hood is communicated with the external environment to avoid suffocation of the patients; finally, the patient is ensured to inhale the introduced fresh oxygen to the maximum extent as far as possible, because the patient inhales and exhales in the hood, the exhaled gas has low oxygen content and high carbon dioxide concentration, and the patient inhales the just introduced oxygen, which is favorable for ensuring better treatment effect.

For the existing simple respirator hood, in order to facilitate or take food, a food taking port with a larger opening is arranged on the respirator hood, after the food taking port is opened, the interior of the hood is completely communicated with the external environment, the respirator does not work any more at the moment, a patient with the respirator hood generally does not have the capacity of being separated from the respirator for a long time, and a user can not get away from the respirator hood for a while. Furthermore, the tail of the section outside the nasogastric tube and the nasointestinal tube is provided with a thick head which is not penetrated through the opening on the nasal feeding tube channel on the hood. Many patients need to add the hood after a period of time with the prior stomach tube, and the problem comes, and the stomach tube tail end can only be pulled out earlier without passing through the opening on the nasal feeding tube channel, and the stomach tube tip passes through the hole of hood earlier, inserts the stomach tube again, and the hand gets the hole in the place ahead and stretches into the hood and fixes the stomach tube with adhesive tape. Three problems exist in the method, 1, the patient in the respiratory distress state is very resistant to the insertion of the gastric tube, so that the patient is in a panic, and then is matched with a series of breath holding and swallowing actions, so that a lot of people cannot do the breath holding and swallowing actions. 2. Some tubes are placed in the operation or placed under a gastroscope, and the tubes cannot be placed back to the original position after being pulled out. The original tube can be reserved without a noninvasive ventilator. 3. The stomach tube is generally fixed at two places of the nasal wing and the earlobe, and a small nurse of women can walk back with a small hand and cannot operate the stomach tube with a large hand.

Disclosure of Invention

The invention provides a noninvasive ventilator hood aiming at overcoming the defects of the technical problems.

The noninvasive ventilator hood comprises a support ring, a hood part and a neck sleeve part, wherein the periphery of the lower end of the hood part is fixed on the support ring, and a cavity for accommodating the head of a patient is arranged in the hood part; the neck sleeve part is in a circular sheet shape, the periphery of the neck sleeve part is fixed on the supporting ring, and the center of the neck sleeve part is provided with a sleeve hole for the head of the patient to pass through and to be matched with the neck of the patient; the method is characterized in that: the head cover part is provided with a pressure regulating valve, a breathing safety valve and a breathing machine joint which are communicated with the inner cavity of the head cover part, and the pressure regulating valve is used for regulating the maximum pressure which can be maintained in the inner cavity of the head cover part; when the pressure in the head cover part is lower than the external pressure, the external environment is communicated with the internal cavity of the head cover part through the breathing safety valve;

a flow guide curtain is arranged on the inner wall of the upper part of the head cover part, a flow guide cavity is formed between the flow guide curtain and the inner wall of the head cover part, the upper end of the flow guide cavity is communicated with the respirator connector, the lower end of the flow guide cavity is an air outlet, and the air outlet is positioned at the position of the nostril of a patient; a plurality of air outlet holes are arranged on the flow guide curtain at the air outlet at the lower end of the flow guide cavity.

The noninvasive ventilator hood of the invention, there are feed openings on the said hood portion, the feed opening is made up of outer lane, inner cup and outer cover, both ends of the outer lane are opened, the outer wall of the outer lane is fixed on hood portion, the inner cup is made up of thick tube part and thin tube part connected together, the inner wall inner cup of the thick tube part is connected with outer wall of the outer lane through the whorl, the inner wall of the outer cover is connected with outer wall of the thin tube part through the whorl; an upper valve and a lower valve are arranged in the inner cavity of the thin cylinder part, the upper valve and the lower valve are both made of transparent elastic soft materials, and the lower part of the upper valve and the upper part of the lower valve are provided with an overlapping area.

The support ring is provided with at least one nasal feeding tube channel for penetrating through a nasal feeding tube or an administration tube, the nasal feeding tube channel consists of a cylindrical barrel and an end cover for plugging the cylindrical barrel, the cylindrical barrel is internally provided with a cylindrical cavity for the penetration of the nasal feeding tube, and the inner diameter of the cylindrical barrel is larger than the outer diameter of a thick head at the end part of the nasal feeding tube; the cylinder is provided with a first semicircular sealing plug and a second semicircular sealing plug which are used for sealing a cavity between the nasogastric tube and the cylinder, and the first semicircular sealing plug and the second semicircular sealing plug are made of soft materials.

According to the noninvasive ventilator hood, the first semicircular sealing plug and the second semicircular sealing plug are respectively provided with a semicircular groove matched with the nasogastric tube, one ends of the first semicircular sealing plug and the second semicircular sealing plug are sharp heads, the other ends of the first semicircular sealing plug and the second semicircular sealing plug are end convex rings convenient to hold by hands, and convex ribs for increasing friction resistance are arranged on the outer side surfaces of the first semicircular sealing plug and the second semicircular sealing plug.

The noninvasive ventilator hood of the invention, there are two sling that locate under two armpits of patient separately on the said supporting ring, there are 4 fixed columns that fix two ends of sling separately on the supporting ring, both ends of each sling equipartition offer multiple attachment holes cooperating with fixed column.

The noninvasive ventilator hood of the invention, the said breathing relief valve is made up of disc, gasket and central axis, the peripheral outer wall of the disc is fixed on hood portion, the central position of the disc has central columns, the central column is connected with disc part of its periphery through multiple tie rods, form the air inlet between the adjacent tie rods; the central cylinder is provided with a shaft hole, the shaft hole penetrates through the central shaft, the diameter of the central shaft is smaller than the aperture of the shaft hole, the center of the sealing piece is fixed on the central shaft, and the sealing piece is positioned on the inner side of the disc.

The noninvasive ventilator hood of the invention, the said pressure regulating valve is made up of thin cylinder, thick cylinder, regulating cap, sealing plug and first supporting spring, both ends of thin cylinder, thick cylinder are open, one end of the thin cylinder is fixed on hood portion, another end links with one end of the thick cylinder, the regulating cap is set up in another end of the thick cylinder by way of threaded connection; a boss is formed at the connecting position of the thin cylinder and the thick cylinder, and the sealing plug is positioned on the boss; a guide rod which is coaxial with the thick cylinder is fixed on the sealing plug, a through hole through which the guide rod passes is formed in the adjusting cap, the first supporting spring is sleeved on the periphery of the guide rod, and two ends of the first supporting spring respectively push against the adjusting cap and the sealing plug; the thick cylinder is provided with an opening communicated with the inner cavity of the thick cylinder.

The noninvasive ventilator hood of the invention, the said thick cylinder has pressure indicating devices, the pressure indicating device is made up of cylinder, rubber plug, second supporting spring and communicating pipe, the inside of the cylinder is a cylindrical cavity, the top of the cylinder has small holes, the rubber plug locates in the internal cavity of the cylinder, the second supporting spring locates between rubber plug and roof of the cylinder, the cavity of the cylinder below the rubber plug is linked with the internal cavity of the thin cylinder through the communicating pipe; the outer wall of the cylindrical pipe is provided with pressure indication scales for indicating the pressure in the head cover part.

The invention has the beneficial effects that: according to the noninvasive ventilator hood, the head hood part and the neck sleeve part are arranged on the supporting ring, so that a relatively sealed environment is formed in the inner cavity of the head hood part, when oxygen is introduced into the head hood part, the inner cavity of the head hood part is ensured to be in a positive-pressure oxygen environment, and oxygen pressure treatment is favorably realized on patients with lung diseases; meanwhile, the pressure regulating valve is arranged, so that the oxygen pressure in the head cover part can be regulated, and the corresponding oxygen pressure can be set according to the specific conditions of different patients, so that the optimal treatment effect is achieved; through setting up the relief valve of breathing, when the breathing machine breaks down and leads to hood portion inner chamber negative pressure to appear, the relief valve of breathing then communicates hood portion inner chamber and external environment, avoids appearing stifling, has ensured patient's safety.

Furthermore, the inner cover with the upper valve and the lower valve is arranged on the feeding port, so that the suction pipe passes through a gap between the upper valve and the lower valve when a patient takes food with the suction pipe, the normal work of the breathing machine cannot be influenced, and the patient can still breathe with the breathing machine during the process of taking fluid food. Through the size that designs cavity in the nasogastric tube passageway for being greater than the thick head of nasogastric tube tip for the patient that has nasogastric tube or nasointestinal tube need not to reset nasogastric tube or nasointestinal tube when wearing the hood, has ensured patient's incessant treatment, has alleviateed patient's pain, and patient's compliance is high.

Drawings

FIG. 1 is a schematic view of the structure of a noninvasive ventilator head cover of the present invention;

FIG. 2 is a schematic structural view of the part of the hood portion where the curtain is located;

FIG. 3 is a schematic view of the structure of the safety valve of the present invention;

FIG. 4 is a schematic structural view of the breath safety valve of the present invention in an open state;

FIG. 5 is a front view of the pressure regulating valve of the present invention;

FIG. 6 is a sectional view of a pressure regulating valve of the present invention;

FIG. 7 is a cross-sectional view of a food intake in the present invention;

FIG. 8 is a schematic view of the present invention using a straw to feed through the intake port;

FIG. 9 is a schematic view of the present invention using a spoon to feed through the mouth;

FIG. 10 is a schematic view of the structure of a nasal feeding tube channel in the present invention;

FIG. 11 is a schematic view of the fitting of the nasogastric tube passageway with a nasogastric tube of the present invention;

fig. 12 is a schematic view of the first and second semi-circular sealing plugs of the present invention;

fig. 13 is a view showing the use of the noninvasive ventilator head cover of the present invention.

In the figure: 1 support ring, 2 cover parts, 3 neck sleeve parts, 4 sleeve holes, 5 breathing machine joints, 6 pressure regulating valves, 7 breathing safety valves, 8 flow guide curtains, 9 flow guide cavities, 10 air outlets and 11 air outlet holes; 12 feeding ports, 13 hanging strips, 14 connecting holes, 15 fixing columns, 16 nasal feeding tube channels, 17 discs, 18 sealing sheets, 19 central cylinders, 20 connecting rods, 21 central shafts and 22 shaft holes; 23 patients, 24 necks, 25 thin cylinders, 26 thick cylinders, 27 adjusting caps, 28 openings, 29 sealing plugs, 30 guide rods, 31 first supporting springs, 32 cylindrical tubes, 33 second supporting springs, 34 rubber plugs, 35 communicating tubes and 36 pressure indicating scales; 37 outer ring, 38 inner cover, 39 upper valve, 40 lower valve, 41 outer cover, 42 suction pipe, 43 feeding spoon, 44 cylinder, 45 end cover, 46 nasal feeding pipe, 47 first semicircle sealing plug, 48 second semicircle sealing plug, 49 groove, 50 end convex ring, 51 convex rib, 52 tip, 53 nasal feeding pipe end thick head, 54 thick cylinder part and 55 thin cylinder part.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, a schematic structural view of a noninvasive ventilator head cover of the present invention is provided, which comprises a support ring 1, a head cover part 2, a neck cover part 3, a ventilator joint 5, a pressure regulating valve 6, a respiratory safety valve 7, a flow guide curtain 8 and two hanging straps 13, wherein the support ring 1 is in a circular ring shape, and the inner diameter of the support ring 1 is larger than the diameter of the head of a patient and smaller than the width of the shoulder of the patient, so as to ensure that the head of the patient can pass through the support ring 1. The head cover part 2 is made of transparent soft material, such as transparent plastic material, the upper end of the head cover part 2 is sealed, the lower end of the head cover part 2 is opened, the periphery of the lower end opening of the head cover part 2 is fixed on the support ring 1, and the interior of the head cover part 2 is a cylindrical cavity for accommodating the head of a patient.

Neck cover portion 3 is the disk shape that the middle part slightly hangs down, and neck cover portion 3 is fixed in on the lock ring 1 all around, and trepanning 4 has been seted up to neck cover portion 3 central authorities, and neck cover portion 3 adopts soft elastic material, like rubber materials, and during the use, patient's head passes from trepanning 4 to make the head get into in the inside cavity of head cover portion 2, and the periphery of patient's neck is arranged in to trepanning 4, and makes trepanning 4 be in encapsulated situation with patient's neck contact site. Thus, when the patient extends into the head cover part 2 from the trepan boring 4, the head of the human body is ensured to be in a relatively sealed state.

The pressure regulating valve 6 is provided on the head mask portion 2 for regulating the maximum pressure maintained in the head mask portion 2 so as to perform different oxygen pressure treatments according to the specific condition of the patient. The breathing safety valve 7 is also arranged on the head cover part 2, the breathing safety valve 7 is used for ensuring the safety of a patient with the head in the head cover part 2, when the breathing machine joint 5 fails and does not supply air, the breathing safety valve 7 is opened along with the continuous consumption of gas in the head cover part 2 and when the negative pressure is generated in the breathing machine joint, the inner cavity of the head cover part 2 is communicated with the external environment, and the suffocation phenomenon of the patient is avoided.

The illustrated breathing machine head 5 is arranged on the head cover part 2, and the breathing machine head 5 is connected with a breathing machine air supply pipe and then used for introducing oxygen into the head cover part 2. The inner wall of the middle upper part of the head cover part 2 is provided with a flow guide curtain 8, as shown in figure 2, the structural schematic diagram of the part of the head cover part of the invention where the flow guide curtain is positioned is provided, a flow guide cavity 9 is formed between the flow guide curtain 8 and the inner wall of the head cover part 2, the upper end of the flow guide cavity 9 is communicated with the respirator joint 5, the lower end of the flow guide cavity 9 is provided with an air outlet 10, the flow guide curtain 8 close to the air outlet 10 is provided with a plurality of air outlet holes 11, the air outlet 10 is positioned at the nostril position of the patient, thus, the oxygen introduced into the respirator joint 5 is guided by the guide cavity 9 and then escapes from the air outlet 10 and the air outlet 11, the escaped oxygen is uniformly distributed around the nasal cavity of the patient, therefore, the patient can be ensured to have better treatment effect because the gas inhaled by the patient each time is the oxygen which is just introduced, the problem that the gas exhaled by the existing patient is easy to be inhaled again is solved, and the ensured patient has better treatment effect.

The number of straps 13 shown is two, the two straps 13 being placed under the two armpits of the patient to ensure a secure fixation of the whole hood at the head part of the patient. The front end and the rear end of the two sides of the support ring 1 are fixed with fixing columns 15, the two ends of each hanging strip 13 are provided with a plurality of connecting holes 14 which are distributed at equal intervals and matched with the fixing columns 15, and when the support ring is used, the connecting holes 14 at proper positions are inserted into the fixing columns 15 according to the size of the body of a patient, so that the head cover is fixed through the hanging strips 13. The support ring 1 is also provided with 2 nasal feeding tube channels 16, the outer end opening of each nasal feeding tube channel 16 is provided with a plugging cap, and when no nasal feeding tube or administration tube passes through each nasal feeding tube channel 16, the nasal feeding tube channel 16 is plugged by the plugging cap, so that the sealing performance of the inner cavity of the head cover part 2 is ensured.

Referring to fig. 3, which shows a schematic structural diagram of the respiratory safety valve of the present invention, the respiratory safety valve 7 is composed of a disk 17, a central cylinder 19, a central shaft 21 and a sealing sheet 18, the outer wall of the periphery of the disk 17 is connected with the head housing part 2, the central cylinder 19 is located at the center of the disk 17, the outer wall of the central cylinder 19 is connected with the disk 17 at the periphery thereof through a plurality of evenly distributed connecting rods 20, so that an air inlet which can be communicated with the inner cavity of the head housing part 2 is formed between the adjacent connecting rods 20. The central cylinder 19 is provided with a shaft hole, the central shaft 21 is inserted into the shaft hole, and the inner diameter of the shaft hole is larger than the diameter of the central shaft 21, so that the central shaft 21 can move in the shaft hole along the length direction. The sealing piece 18 is shown fixed to a central shaft 21, the sealing piece 18 being located inside the disc 17.

Thus, when the inner cavity of the head cover part 2 is in positive pressure, the sealing sheet 18 is tightly attached to the disc 17, and the sealing performance of the inner cavity of the head cover part 2 is ensured; if the breathing machine fails, air is not supplied to the inner cavity of the head cover part 2 any more, the air pressure in the inner cavity of the head cover part 2 is reduced, and when the air pressure is reduced to be lower than the external air pressure, the external air pressure forces the sealing piece 18 to move in the direction away from the disc 17, as shown in fig. 4, a structural schematic diagram that the breathing safety valve is in an open state is given, and the external air enters the inner cavity of the head cover part 2 through the air inlet of the connecting rod 20 support and the gap between the sealing piece 18 and the disc 17 in sequence, so that suffocation of a patient is avoided.

Referring to fig. 7, which shows a sectional view of the feeding port of the present invention, for a patient who does not have a nasogastric tube or a nasointestinal tube inserted therein, it is inconvenient to feed when wearing a hood, and after the feeding port 12 is provided at a portion of the hood portion 2 corresponding to the mouth of the patient, it is convenient to feed through the feeding port 12. The illustrated food inlet 12 is composed of an outer ring 37, an inner lid 38, and an outer lid 41, wherein both ends of the outer ring 37 are open, the outer wall of the outer ring 37 is fixed to the head cover portion 2, the inner lid is composed of a thick cylinder portion 54 and a thin cylinder portion 55 which are connected together, the inner wall of the thick cylinder portion 54 is screwed to the outer wall of the outer ring 37, and the inner wall of the outer lid 41 is screwed to the outer wall of the thin cylinder portion 55. When the patient does not eat food, the outer cover 41 is screwed on the thin cylinder part 55 of the inner cover 38, and the thick cylinder part 54 of the inner cover 38 is screwed on the upper outer ring 37, so that the food inlet 12 is sealed, the food inlet 12 is sealed and air-tight, and the normal work of the breathing machine is ensured. An upper valve 39 and a lower valve 40 are arranged in the inner cavity of the thin cylinder part 55 of the inner cover 38, the upper valve 39 and the lower valve 40 are both made of soft materials, and the lower part of the upper valve 39 and the upper part of the lower valve 40 are partially attached.

As shown in fig. 8, which shows a schematic view of feeding through a feeding port by using a straw in the present invention, when a patient needs to take fluid food, the patient only needs to remove the outer cover 41 and insert the straw 42 into the gap between the upper valve 39 and the lower valve 40 for feeding, and the feeding port 12 is still in a substantially sealed state, which does not affect the normal operation of the ventilator, thereby solving the problem that the patient cannot be separated from the ventilator. Referring to fig. 9, which shows a schematic view of the present invention using a spoon to feed through a mouth, in the case where there is no problem when a patient is detached from a ventilator for a certain period of time, the outer cap 41 and the inner cap 38 are removed and feeding is performed using the spoon.

As shown in fig. 10, the structure of the nasal feeding tube passage in the invention is shown, as shown in fig. 11, the structure of the nasal feeding tube passage in the invention is shown, the nasal feeding tube passage 16 is shown to be composed of a cylindrical tube 44 and an end cover 45 for sealing the cylindrical tube, the inside of the cylindrical tube 44 is a cavity for the nasal feeding tube 46 to pass through, and the diameter of the inner cavity of the cylindrical tube 44 is larger than the outer diameter of a thick head 53 at the end part of the nasal feeding tube, so that even if a patient firstly inserts the nasal feeding tube 36 and then wears the nose cap, the nasal feeding tube 36 is not required to be pulled out, and the nasal feeding tube directly passes through the.

When the thick end 53 of the nasogastric tube passes through the internal cavity of the cylindrical barrel 44, the portion of the nasogastric tube 46 remaining in the internal cavity of the cylindrical barrel 44 is thin, and the sealing problem needs to be solved, and the sealing is performed by the first semicircular sealing plug 47 and the second semicircular sealing plug 48. Referring to fig. 12, which shows the structure of the first and second semicircular sealing plugs of the present invention, the first and second semicircular sealing plugs 47 and 48 are shown to have one end inserted into the tip 52 of the cavity between the nasogastric tube 46 and the cylindrical barrel 44 and the other end held by a hand-held end protrusion ring 50, and the first and second semicircular sealing plugs 47 and 48 are formed with grooves 49 on the inner surfaces thereof for receiving the nasogastric tube 46 and ribs 51 on the outer surfaces thereof for increasing frictional resistance. The first and second semi-circular plugs 47, 48 are inserted into the cavity between the nasogastric tube 46 and the cylindrical barrel 44 to ensure the sealing of the nasogastric tube passageway 16.

As shown in fig. 5 and fig. 6, which respectively show a front view and a cross-sectional view of the pressure regulating valve of the present invention, the pressure regulating valve 6 is composed of a thin cylinder 25, a thick cylinder 26, a regulating cap 27, a sealing plug 29, a guide rod 30 and a first supporting spring 31, the interiors of the thin cylinder 25 and the thick cylinder 26 are both cavities with two open ends, one end of the thin cylinder 25 is fixed on the head cover portion 2, so that the interior cavity of the head cover portion 2 is communicated with the interior cavity of the thin cylinder 25, a boss is formed at the connection part of the thin cylinder 25 and the thick cylinder 26, the sealing plug 29 is located in the interior cavity of the thick cylinder 26, and the sealing plug is abutted against the boss to block the thin cylinder 25. The illustrated thick cylinder 26 is uniformly provided with a plurality of openings 28.

The guide rod 30 is located in the inner cavity of the thick cylinder 26, and the guide rod 30 is coaxially arranged with the thick cylinder 26. An adjusting cap 27 is disposed at the outer end of the thick cylinder 26, and the adjusting cap 27 is connected with the thick cylinder 26 via threads, so that the adjusting cap 27 can move along the length direction of the thick cylinder 26. A through hole through which the guide rod 30 passes is formed in the center of the adjusting cap 27, one end of the guide rod 30 is fixed on the sealing plug 29, and the other end of the guide rod 30 passes through the through hole of the adjusting cap 27; the first supporting spring 31 is located on the periphery of the guiding rod 30, one end of the first supporting spring 31 is pressed against the sealing plug 29, and the other end is pressed against the adjusting cap 27. When the adjustment cap 27 is rotated to move toward the sealing plug 29, the compression amount of the first supporting spring 31 becomes large, the pressure required to push the sealing plug 29 open becomes large, and at this time, the oxygen pressure that can be maintained in the internal cavity of the head housing portion 2 becomes large; conversely, when the adjustment cap 27 is rotated to move in a direction away from the sealing plug 29, the compression amount of the first supporting spring 31 becomes small, the pressure required to push the sealing plug 29 open becomes small, and at this time, the oxygen pressure that can be maintained in the internal cavity of the head cover portion 2 becomes small.

A pressure indicating device is arranged on the thick cylinder 26 and consists of a cylindrical tube 32, a rubber plug 34, a second supporting spring 33 and a communicating tube 35, the interior of the cylindrical tube 32 is a cylindrical cavity, a small hole is formed in the top end of the cylindrical tube 32, the rubber plug 34 is positioned in the inner cavity of the cylindrical tube 32, the second supporting spring 33 is positioned between the rubber plug 34 and the top wall of the cylindrical tube 32, and the cavity of the cylindrical tube 32 below the rubber plug 34 is communicated with the inner cavity of the thin cylinder 25 through the communicating tube 35; the outer wall of the cylindrical tube 32 is provided with pressure indicating scales indicating the magnitude of the pressure in the head cover portion 2, the indicated pressure being in units of centimeters of water.

As shown in fig. 13, the using state diagram of the noninvasive ventilator head cover of the invention is given, when in use, firstly, the head of a patient extends into the inner cavity of the head cover part 2 through the trepanning 4, then the sling 13 is placed under the two armpits of the patient, the connecting holes 14 on the proper positions of the two ends of the sling 13 are inserted on the fixing columns 15, then the food inlet 12 is ensured to be in a sealed state, the oxygen pressure to be maintained is adjusted to be proper size through the pressure adjusting valve 6, then the ventilator joint 5 is connected with the air outlet pipe of the ventilator, and the ventilator is started, thus realizing the oxygen pressure therapy of the patient.

Claims

1. A noninvasive ventilator hood comprises a support ring (1), a hood part (2) and a neck sleeve part (3), wherein the periphery of the lower end of the hood part is fixed on the support ring, and a cavity for accommodating the head of a patient is arranged in the hood part; the neck sleeve part is in a circular sheet shape, the periphery of the neck sleeve part is fixed on the supporting ring, and the center of the neck sleeve part is provided with a sleeve hole (4) for the head of the patient to pass through and to be matched with the neck of the patient; the method is characterized in that: the head cover part (2) is provided with a pressure regulating valve (6) communicated with an inner cavity of the head cover part, a breathing safety valve (7) and a breathing machine joint (5), and the pressure regulating valve is used for regulating the maximum pressure which can be maintained in the inner cavity of the head cover part; when the pressure in the head cover part is lower than the external pressure, the external environment is communicated with the internal cavity of the head cover part through the breathing safety valve;

a flow guide curtain (8) is arranged on the inner wall of the middle upper part of the hood part (2), a flow guide cavity (9) is formed between the flow guide curtain and the inner wall of the hood part, the upper end of the flow guide cavity is communicated with the respirator joint (5), the lower end of the flow guide cavity is an air outlet (10), and the air outlet is positioned at the position of the nostril of the patient; a plurality of air outlet holes (11) are arranged on the flow guide curtain at the air outlet at the lower end of the flow guide cavity.

2. The noninvasive ventilator hood of claim 1, wherein: the head cover part (2) is provided with a feeding port (12), the feeding port consists of an outer ring (37), an inner cover (38) and an outer cover (41), two ends of the outer ring are opened, the outer wall of the outer ring is fixed on the head cover part (2), the inner cover consists of a thick cylinder part (54) and a thin cylinder part (55) which are connected together, the inner wall of the thick cylinder part is in threaded connection with the outer wall of the outer ring, and the inner wall of the outer cover is in threaded connection with the outer wall of the thin cylinder part; an upper valve (39) and a lower valve (40) are arranged in the inner cavity of the thin cylinder part, the upper valve and the lower valve are both made of transparent elastic soft materials, and the lower part of the upper valve and the upper part of the lower valve are provided with an overlapping area.

3. A noninvasive ventilator hood as in claim 1 or 2, characterized in that: the support ring (1) is provided with at least one nasal feeding tube passage (16) used for penetrating through a nasal feeding tube or an administration tube, the nasal feeding tube passage consists of a cylindrical tube (44) and an end cover (45) for plugging the cylindrical tube, a cylindrical cavity for the penetration of the nasal feeding tube (46) is formed inside the cylindrical tube, and the inner diameter of the cylindrical tube is larger than the outer diameter of a thick head (53) at the end part of the nasal feeding tube; a first semicircular sealing plug (47) and a second semicircular sealing plug (48) which are used for sealing a cavity between the nasogastric tube and the cylinder are arranged in the cylinder, and the first semicircular sealing plug and the second semicircular sealing plug are made of soft materials.

4. The noninvasive ventilator hood of claim 3, wherein: semicircular grooves (49) matched with the nasogastric tube (46) are formed in the first semicircular sealing plug (47) and the second semicircular sealing plug (48), one ends of the first semicircular sealing plug and the second semicircular sealing plug are pointed parts (52), end convex rings (50) convenient to hold by hands are arranged at the other ends of the first semicircular sealing plug and the second semicircular sealing plug, and convex ribs (51) used for increasing friction resistance are arranged on the outer side faces of the first semicircular sealing plug and the second semicircular sealing plug.

5. The noninvasive ventilator hood of claim 1, wherein: two hanging strips (13) which are respectively arranged below two armpits of a patient are arranged on the supporting ring (1), 4 fixing columns (15) which are respectively used for fixing two ends of the two hanging strips are fixed on the supporting ring, and a plurality of connecting holes (14) matched with the fixing columns are formed in the two ends of each hanging strip at equal intervals.

6. A noninvasive ventilator hood as in claim 1 or 2, characterized in that: the respiratory safety valve (7) consists of a disc (17), a sealing piece (18) and a central shaft (21), the outer walls of the periphery of the disc are fixed on the head cover part, a central cylinder (19) is arranged at the central position of the disc, the central cylinder is connected with the disc part at the periphery of the central cylinder through a plurality of connecting rods (20), and an air inlet is formed between the adjacent connecting rods; the central cylinder is provided with a shaft hole (22), a central shaft (21) penetrates through the shaft hole, the diameter of the central shaft is smaller than the aperture of the shaft hole, the center of the sealing piece is fixed on the central shaft, and the sealing piece is positioned on the inner side of the disc (17).

7. A noninvasive ventilator hood as in claim 1 or 2, characterized in that: the pressure regulating valve (6) consists of a thin cylinder (25), a thick cylinder (26), a regulating cap (27), a sealing plug (29) and a first supporting spring (31), wherein both ends of the thin cylinder and the thick cylinder are open, one end of the thin cylinder is fixed on the head cover part, the other end of the thin cylinder is connected with one end of the thick cylinder, and the regulating cap is arranged at the other end of the thick cylinder in a threaded connection manner; a boss is formed at the connecting position of the thin cylinder and the thick cylinder, and the sealing plug is positioned on the boss; a guide rod (30) which is coaxial with the thick cylinder is fixed on the sealing plug (9), a through hole through which the guide rod passes is formed in the adjusting cap, the first supporting spring is sleeved on the periphery of the guide rod, and two ends of the first supporting spring respectively push against the adjusting cap and the sealing plug; the thick cylinder is provided with an opening (28) communicated with the inner cavity of the thick cylinder.

8. The noninvasive ventilator hood of claim 5, wherein: the thick cylinder (26) is provided with a pressure indicating device, the pressure indicating device consists of a cylindrical tube (32), a rubber plug (34), a second supporting spring (33) and a communicating tube (35), the interior of the cylindrical tube is a cylindrical cavity, the top end of the cylindrical tube is provided with a small hole, the rubber plug is positioned in the inner cavity of the cylindrical tube, the second supporting spring is positioned between the rubber plug and the top wall of the cylindrical tube, and the cavity of the cylindrical tube below the rubber plug is communicated with the inner cavity of the thin cylinder through the communicating tube; the outer wall of the cylindrical pipe is provided with pressure indication scales for indicating the pressure in the head cover part (2).