CN107158539B - High airflow velocity nasopharyngeal airway capable of preventing nasal mucosa from being damaged - Google Patents
High airflow velocity nasopharyngeal airway capable of preventing nasal mucosa from being damaged Download PDFInfo
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- CN107158539B CN107158539B CN201710506614.0A CN201710506614A CN107158539B CN 107158539 B CN107158539 B CN 107158539B CN 201710506614 A CN201710506614 A CN 201710506614A CN 107158539 B CN107158539 B CN 107158539B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0461—Nasoendotracheal tubes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/06—Head
- A61M2210/0618—Nose
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/06—Head
- A61M2210/0625—Mouth
- A61M2210/065—Throat; Pharynx
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a nasopharyngeal airway with high airflow velocity for preventing nasal mucosa from being damaged, which comprises a main pipe, wherein the main pipe comprises a tail pipe section, a middle pipe section and a head pipe section which are connected in sequence; the inner diameter and the outer diameter of the head pipe section are gradually reduced along the direction of airflow direction, and the end face of the air outlet end of the head pipe section is perpendicular to the central shaft of the head pipe section. The invention improves the head pipe section of the nasopharynx air passage, the section of the head pipe section is perpendicular to the central axis of the air passage, so that the head end of the nasopharynx air passage is uniformly retracted, the inner diameter of the head pipe section is gradually reduced, the inner coil of the air outlet end of the head pipe section is formed into a smooth end surface, the tip end of the head pipe section is passivated, and the damage of the sharp head end of the traditional nasopharynx air passage to nasal mucosa can be effectively prevented. The inner diameter of the head pipe section is gradually reduced, and the inner coil of the air outlet end of the head pipe section further reduces the diameter of the air outlet of the head pipe section, so that the flow velocity of the head end air flow is increased according to the poiseuille law, and the dispersion of oxygen can be effectively increased.
Description
Technical Field
The invention belongs to the technical field of nasopharyngeal airways, and particularly relates to a nasopharyngeal airway capable of preventing nasal mucosa from being damaged at a high airflow velocity.
Background
The nasopharyngeal airway is used as an airway opening tool for preventing upper respiratory obstruction caused by glossoptosis, has wide clinical application and obvious effect. And the continuous high-flow oxygen is given through the nasopharyngeal airway, so that the nasal airway also has a certain effect. However, the prior nasopharyngeal airway has the following disadvantages in use:
(1) The nasal mucosa is easy to be damaged in the placing process, so that the pain of a patient is difficult to be tolerated;
(2) The nasal mucosa is bleeding in the placing process, even the bleeding causes the patient to choking, or the comatose and anaesthetized patient can inhale the respiratory tract by mistake, which causes the respiratory tract choking and the inhalation pneumonia;
(3) The continuous high flow of oxygen is administered through the nasopharyngeal airway, and the effect of improving the ventilation function of the lungs is poor in patients with apnea or hypopnea.
Disclosure of Invention
Based on the above, the present invention provides a nasopharyngeal airway with high airflow velocity for preventing nasal mucosa from being damaged, which can effectively avoid the damage to the nasal mucosa, avoid the occurrence of dangerous situations such as respiratory tract asphyxia and aspiration pneumonia caused by the bleeding of the nasal mucosa, and effectively increase the dispersion of oxygen.
The technical scheme of the invention is as follows: the nasopharyngeal airway with high airflow velocity for preventing nasal mucosa from being damaged comprises a main pipe, wherein the main pipe comprises a tail pipe section, a middle pipe section and a head pipe section which are connected in sequence; the inner diameter and the outer diameter of the head pipe section are gradually reduced along the direction of airflow direction, and the end face of the air outlet end of the head pipe section is perpendicular to the central shaft of the head pipe section.
The invention improves the head pipe section of the nasopharynx air passage, the section of the head pipe section is perpendicular to the central axis of the air passage, so that the head end of the nasopharynx air passage is uniformly retracted, the inner diameter of the head pipe section is gradually reduced, the inner coil of the air outlet end of the head pipe section is formed into a smooth end surface, the tip end of the head pipe section is passivated, and the damage of the sharp head end of the traditional nasopharynx air passage to nasal mucosa can be effectively prevented. The inner diameter of the head pipe section is gradually reduced, and the inner coil of the air outlet end of the head pipe section further reduces the diameter of the air outlet of the head pipe section, so that the flow velocity of the head end air flow is increased according to the poiseuille law, and the dispersion of oxygen can be effectively increased.
As a further improvement of the invention, the inner diameter of the air outlet end of the head pipe section is 0.4-0.6 times of the inner diameter of the air inlet end of the tail pipe section.
According to poiseuille law, the ratio of the flow rate of the air outlet end of the head pipe section to the flow rate of the air inlet end of the tail pipe section is inversely proportional to the square of the ratio of the inner diameters of the air outlet end of the head pipe section and the air inlet end of the tail pipe section, and the flow rate of the air outlet end of the head pipe section is further precisely controlled by precisely controlling the ratio of the inner diameter of the air outlet end of the head pipe section to the inner diameter of the air inlet end of the tail pipe section, for example, when the inner diameter of the air outlet end of the head pipe section is half of the inner diameter of the air inlet end of the tail pipe section, the flow rate of the air outlet end of the head pipe section is 4 times of the flow rate of the air inlet end of the tail pipe section.
As a further improvement of the invention, the outer diameter of the air outlet end of the head pipe section is 0.55-0.75 times of the outer diameter of the air inlet end of the tail pipe section.
As a further improvement of the invention, the middle pipe section is arc-shaped, and the tangent line at the air inlet end of the tail pipe section and the tangent line at the air outlet end of the head pipe section form an included angle of 10-20 degrees.
The middle tube section is designed into an arc shape, and the tangent line at the air inlet end of the tail tube section and the tangent line at the air outlet end of the head tube section form an included angle of 10-20 degrees, so that the nose-throat ventilation catheter conforms to the path of the nasal cavity of a human body, is convenient for inserting the nose-throat ventilation catheter from the nasal cavity and is convenient for operation.
As a further improvement of the invention, the inner diameter and the outer diameter of the tail pipe section are equal to the inner diameter and the outer diameter of the middle pipe section, and the inner diameter of the tail pipe section is 5mm-8.5mm.
As a further improvement of the invention, the length of the head pipe section is 0.4 times to 0.6 times the sum of the lengths of the tail pipe section and the intermediate pipe section.
As a further development of the invention, the sum of the lengths of the tail pipe section, the intermediate pipe section and the head pipe section is 15cm-20cm.
As a further improvement of the invention, the air inlet end of the tail pipe section is in a horn shape.
The air inlet end of the tail pipe section is designed into a horn shape, so that the whole nasopharynx airway is prevented from sliding into the nasopharynx cavity of a human body, and the safety is improved.
As a further improvement of the invention, the air inlet end of the tail pipe section is provided with a respirator joint.
The breathing machine connector is arranged at the air inlet end of the tail pipe section, so that the breathing machine is convenient to externally connect, and the operation is convenient.
The beneficial effects of the invention are as follows:
(1) By improving the head end pipe section of the nasopharyngeal airway, the tip of the nasal airway is passivated, so that the damage of the sharp head end of the traditional nasopharyngeal airway to nasal mucosa can be effectively prevented, the diameter of an air outlet of the nasal airway is reduced, the flow rate of oxygen is increased, and the diffusion of oxygen to the lung is more effectively increased;
(2) The section of the head pipe section is perpendicular to the central axis of the airway, so that the head end of the nasopharynx airway is uniformly retracted, the inner diameter of the head pipe section is gradually reduced, the inner coil of the air outlet end of the head pipe section forms a smooth end face, the tip of the head pipe section is passivated, the damage of the sharp head end of the traditional nasopharynx airway to nasal mucosa can be effectively prevented, and the dangerous conditions such as respiratory tract asphyxia and aspiration pneumonia caused by nasal mucosa bleeding are avoided;
(3) The inner diameter of the head pipe section is gradually reduced, the inner coil of the air outlet end of the head pipe section further reduces the diameter of the air outlet of the head pipe section, and according to the poiseuille law, the flow speed of the head end air flow is increased, so that the diffusion of oxygen into the lung can be effectively increased;
(4) The ratio of the inner diameter of the air outlet end of the head pipe section to the inner diameter of the air inlet end of the tail pipe section is accurately controlled, so that the air outlet end flow velocity of the head pipe section is accurately controlled, and if the inner diameter of the air outlet end of the head pipe section is one half of the inner diameter of the air inlet end of the tail pipe section, the air outlet end flow velocity of the head pipe section is 4 times of the air inlet end flow velocity of the tail pipe section, the air flow velocity is increased by accurately controlling, the air flow power is enhanced, the diffusion of oxygen into the lung is effectively increased, and the device is particularly effective for patients with apnea or sudden cases of dyspnea.
Drawings
FIG. 1 is a schematic view of the structure of a nasopharyngeal airway for preventing damage to nasal mucosa according to an embodiment of the present invention;
reference numerals illustrate:
the main pipe 10, the tail pipe section 11, the air inlet end of the tail pipe section 11a, the middle pipe section 12, the head pipe section 13, the air outlet end of the head pipe section 13a and the breathing machine joint 20.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples:
as shown in fig. 1, a nasopharyngeal airway for preventing injury to nasal mucosa with high airflow rate comprises a main tube 10, wherein the main tube 10 comprises a tail tube section 11, a middle tube section 12 and a head tube section 13 which are sequentially connected; the inner diameter and the outer diameter of the head pipe section 13 are gradually reduced along the direction of the airflow direction, and the end face of the air outlet end 13a of the head pipe section is perpendicular to the central axis of the head pipe section 13.
According to the invention, the head pipe section 13 of the nasopharynx airway is improved, the section of the head pipe section 13 is perpendicular to the central axis of the airway, so that the head end of the nasopharynx airway is uniformly retracted, the inner diameter of the head pipe section 13 is gradually reduced, the inner coil of the air outlet end 13a of the head pipe section is formed into a smooth end face, the tip of the head pipe section is passivated, and the damage of the sharp head end of the traditional nasopharynx airway to nasal mucosa can be effectively prevented. The inner diameter of the head pipe section 13 is gradually reduced, and the air outlet end 13a of the head pipe section is internally coiled to further reduce the diameter of the air outlet of the head pipe section, so that the flow velocity of the head end air flow is increased according to the poiseuille law, and the dispersion of oxygen can be effectively increased.
In another embodiment, the inner diameter of the outlet end 13a of the head pipe segment is 0.5 times, 0.4 times or 0.6 times the inner diameter of the inlet end 11a of the tail pipe segment.
According to poiseuille's law, the ratio of the airflow velocity of the air outlet end 13a of the head pipe section to the airflow velocity of the air inlet end 11a of the tail pipe section is inversely proportional to the square of the ratio of the inner diameters of the two, and by precisely controlling the ratio of the inner diameter of the air outlet end 13a of the head pipe section to the inner diameter of the air inlet end 11a of the tail pipe section, the airflow velocity of the air outlet end 13a of the head pipe section is precisely controlled, for example, when the inner diameter of the air outlet end 13a of the head pipe section is half of the inner diameter of the air inlet end 11a of the tail pipe section, the flow velocity of the air outlet end 13a of the head pipe section is 4 times of the flow velocity of the air inlet end 11a of the tail pipe section, and by precisely controlling the increase of the airflow velocity, the airflow power is enhanced, the oxygen dispersion to the lung is effectively increased, and the method is particularly effective for the breathing suspension of the breathing action of a patient or the sudden situation of dyspnea of the patient.
In another embodiment, the outer diameter of the outlet end 13a of the head pipe segment is two-thirds of the outer diameter of the inlet end 11a of the tail pipe segment, and may be 0.55 times or 0.75 times.
In another embodiment, the middle pipe section 12 is arc-shaped, and an included angle r formed by a tangent line at the air inlet end 11a of the tail pipe section and a tangent line at the air outlet end 13a of the head pipe section may be 15 °, 10 ° or 20 °.
The middle pipe section 12 is designed into an arc shape, and an included angle r formed by a tangent line at the air inlet end 11a of the tail pipe section and a tangent line at the air outlet end 13a of the head pipe section is 15 degrees, so that the nose and throat ventilation catheter conforms to the path of the nose and throat cavity of a human body, and is convenient to insert from the nose and throat cavity and operate.
In another embodiment, the inner diameter and the outer diameter of the tail pipe section 11 are equal to the inner diameter and the outer diameter of the middle pipe section 12, and the inner diameter of the tail pipe section 11 is 5mm, but may be 6mm, 7mm, 7.5mm, 8mm or 8.5mm. Different inner diameters form nasopharyngeal airways of different specifications, and are suitable for nasopharyngeal cavities of human bodies of different sizes.
In another embodiment, the length of the head pipe section 13 is one of two persons who are the sum of the lengths of the tail pipe section 11 and the middle pipe section 12, i.e., the length of the head pipe section 13 is one third, or may be two fifths or three fifths, of the length of the entire main pipe 10.
The outer diameter of the head pipe section 13 is gradually reduced, and the length of the head pipe section accounts for one third of the length of the whole main pipe 10, so that the head pipe section conforms to the path of a human nasopharyngeal cavity, and a nasopharyngeal airway tube is convenient to insert from a nasopharyngeal cavity and convenient to operate.
In another embodiment, the sum of the lengths of the tail pipe section 11, the middle pipe section 12 and the head pipe section 13 is 17cm, and can be 15cm or 20cm.
In another embodiment, the inlet end 11a of the tail pipe section is flared.
The air inlet end 11a of the tail pipe section is designed into a horn shape, so that the whole nasopharynx airway is prevented from sliding into the nasopharynx cavity of a human body, and the safety is improved.
In another embodiment, the inlet end 11a of the tail section is provided with a ventilator connection 20.
The breathing machine connector 20 is arranged at the air inlet end of the tail pipe section, so that the breathing machine is convenient to externally connect, and the operation is convenient.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (4)
1. A high airflow rate nasopharyngeal airway for preventing injury to nasal mucosa, comprising: the device comprises a main pipe, wherein the main pipe comprises a tail pipe section, a middle pipe section and a head pipe section which are sequentially connected; the inner diameter and the outer diameter of the head pipe section are gradually reduced along the direction of airflow direction, and the end face of the air outlet end of the head pipe section is perpendicular to the central shaft of the head pipe section;
the inner diameter of the air outlet end of the head pipe section is 0.4-0.6 times of the inner diameter of the air inlet end of the tail pipe section;
the outer diameter of the air outlet end of the head pipe section is 0.55-0.75 times of the outer diameter of the air inlet end of the tail pipe section;
the middle pipe section is arc-shaped, and an included angle of 10-20 degrees is formed between a tangent line at the air inlet end of the tail pipe section and a tangent line at the air outlet end of the head pipe section;
the inner diameter and the outer diameter of the tail pipe section are equal to those of the middle pipe section, and the inner diameter of the tail pipe section is 5mm-8.5mm;
the length of the head pipe section is 0.4-0.6 times of the sum of the lengths of the tail pipe section and the middle pipe section.
2. The high airflow rate nasopharyngeal airway for preventing injury to a nasal mucosa of claim 1, wherein: the sum of the lengths of the tail pipe section, the middle pipe section and the head pipe section is 15cm-20cm.
3. The high airflow rate nasopharyngeal airway for preventing injury to a nasal mucosa of claim 1, wherein: the air inlet end of the tail pipe section is in a horn shape.
4. A high airflow rate nasopharyngeal airway for preventing injury to a nasal mucosa as claimed in claim 3 wherein: and a breathing machine joint is arranged at the air inlet end of the tail pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710506614.0A CN107158539B (en) | 2017-06-28 | 2017-06-28 | High airflow velocity nasopharyngeal airway capable of preventing nasal mucosa from being damaged |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710506614.0A CN107158539B (en) | 2017-06-28 | 2017-06-28 | High airflow velocity nasopharyngeal airway capable of preventing nasal mucosa from being damaged |
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| CN107158539A CN107158539A (en) | 2017-09-15 |
| CN107158539B true CN107158539B (en) | 2023-06-20 |
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| CN107158539A (en) | 2017-09-15 |
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