EP3554605A1 - Nasenkanüle für high-flow-beatmung - Google Patents
Nasenkanüle für high-flow-beatmungInfo
- Publication number
- EP3554605A1 EP3554605A1 EP17809299.5A EP17809299A EP3554605A1 EP 3554605 A1 EP3554605 A1 EP 3554605A1 EP 17809299 A EP17809299 A EP 17809299A EP 3554605 A1 EP3554605 A1 EP 3554605A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nose tube
- tube
- nasal cannula
- nose
- nasal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- A61M16/06—Respiratory or anaesthetic masks
- A61M16/0666—Nasal cannulas or tubing
-
- 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
- A61M16/06—Respiratory or anaesthetic masks
- A61M16/0666—Nasal cannulas or tubing
- A61M16/0672—Nasal cannula assemblies for oxygen therapy
-
- 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
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0816—Joints or connectors
-
- 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
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0875—Connecting tubes
-
- 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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/02—Gases
- A61M2202/0208—Oxygen
-
- 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
- A61M2206/00—Characteristics of a physical parameter; associated device therefor
- A61M2206/10—Flow characteristics
- A61M2206/11—Laminar flow
-
- 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
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
- A61M2230/42—Rate
Definitions
- the invention relates to a nasal cannula for high-flow beat ⁇ ment, wherein the nasal cannula a base body having a cavity, a hose connection element for fluidkommuniplasticden connecting a hose to the cavity, and a first and a second away from the base body nose tube for fluidkommuniecuringden connecting ever having a nostril with the cavity.
- the patien ⁇ th heated and moistened breathing gas is supplied in the form of a Gemi ⁇ ULTRASONIC of oxygen and air. This improves the oxygenation of the patient.
- a nasal cannula is used as the interface between the ventilator and the patient.
- each nostril is treated with its own tube and in which only one hose is used for both nostrils to keep the number of hose connections low.
- the invention deals with the alternative with a hose connection for both nostrils.
- a nasal cannula with a tube connection the tube is brought from one side of the patient to the nasal cannula.
- the nasal cannula has two hollow Na ⁇ spine, which are inserted into each one of the nostrils.
- One of the nasal pricks is closer to the tube than the other. This creates a dynamic pressure at the entrance to the nasopharynx, which is created by diverting the respiratory gas flow at the entrance of this nasal prick.
- the main body has a restriction between the nasal prongs in order to distribute the respiratory gas flow evenly to the two nasal prongs.
- a disadvantage of this device is that it is difficult to manufacture and difficult to clean. Furthermore, turbulences can arise in the main body, which can negate the uniform distribution of the respiratory gas flow again. Furthermore, in the case of material defects, part of the restriction can break off and block the main body.
- the object of the present invention is therefore to provide a nasal cannula which is easy to manufacture and clean and avoids turbulence of the respiratory gas flow in the body or blockages.
- the nasal cannula comprises a base body having a lumen, a tubing connection member for fluidly communicating a tubing to the lumen, and first and second nasal tubes facing away from the base body for fluidly communicating a respective nostril with the lumen has, according to the invention provided that the first nose tube has a different flow resistance than the second nose tube.
- the core of the invention is, by means of the various flow resistances in the two nasal tubes, the respiratory gas flow to regulate between the two nasal tubes. Due to the two different flow resistances in the nasal tubes a homogeneous pressure distribution in the cavity is effected. Due to the homogeneous pressure distribution flows through the two nasal tubes essentially a same size breathing gas flow.
- the invention has recognized that the combination of the flow resistance in the upstream cavity between the respective nose tube and the hose connection element determines the respiratory gas flow through the respective nose tube. Due to the different flow resistances of the first compared to the second nose tube, the total flow resistances on the paths between the hose connection element and the first and second nose tubes are matched to each other.
- the nasal cannula according to the invention is easy to clean ⁇ gen because the nasal tubes are easily accessible from the outside. Ver ⁇ blockages of the base body through broken parts be avoided because of the respiratory gas flow is directed from the body out and fed out small broken pieces from the nasal cannula. Next turbulence is avoided in the body by these Anord ⁇ planning.
- the first nose tube is closer to the first nose tube
- Hose connection element arranged as the second nose tube, wherein the first nose tube has a lower flow resistance than the second nose tube.
- the invention is thus based on the special realization that it is advantageous for achieving a uniform flow through the nasal tubes when the first nose tube has a lower flow resistance than the second, although the first closer to the tube connection element in comparison to the second nose tube. is orders, so that the flow path of the oxygen ersor ⁇ tion to the outlet of the respective nose tube in fürströ ⁇ tion of the first nose tube is shorter than in the flow through the second nose tube.
- an inner diameter averaged along the longitudinal axis of the first nose tube is different from an inner diameter measured along the longitudinal axis of the second nose tube .
- the axis along the cavity of the nose ⁇ pipe is understood. The walls of the nasal tube extending thereabouts ⁇ at about the longitudinal axis.
- the averaged along the longitudinal axis of the first nose tube inner diameter is greater than the averaged along the longitudinal axis of the second nose tube inner diameter ⁇ .
- the second nose tube with advantage to a Ele ⁇ element for increasing the flow resistance. Since the first nose tube is arranged closer to the hose connection element than the second nose tube, the dynamic pressure region which arises in the cavity at the second nose tube is enlarged over the entire cavity to the first nose tube. As a result, a homogeneous pressure is generated in the cavity, so that the respiratory gas flow are equalized by the first and the second nose tube.
- the greater proportion of the flow passes in the same dimensions of the first and second nasal tube through the second nasal tube, although the flow path is longer at the fürströ ⁇ tion of the nasal cannula.
- the flow resistance on the flow path through the first nose tube is advantageously increased by utilizing the invention in order to equalize the total flow through the two nose tubes strö ⁇ ing volume flows or adapt to each other.
- the inner diameter of the first nose tube is advantageously larger than the inner diameter of the second nose tube.
- the second nose tube advantageously has a restriction element.
- an outlet opening of the f th ⁇ nose tube has the same diameter as an off ⁇ opening of the second nasal tube.
- the outlet openings may advantageously have a diameter between 1 mm and 15 mm, preferably between 2 mm and 10 mm, more preferably between 3.5 mm and 6 mm.
- the second nose tube can further advantageously with advantage starting from the cavity first having a conically tapered portion and then a cylindrically shaped portion, wherein the first nose tube, starting from the cavity has a cylindric ⁇ shaped portion. Due to the conically tapered section of the flow resistance of the nasal tube he ⁇ höht, since by the taper has a density increase in the flowing fluid is formed by the taper.
- the conically tapered Ab ⁇ section has an opening angle between 2 degrees to 6 degrees, preferably ⁇ 3 degrees to 5 degrees, more preferably of 4 degrees.
- the second nasal tube advantageously has a surface on an inner wall region which has a greater flow resistance than a surface in an inner wall region of the first nasal tube.
- FIG. 1 shows a schematic representation of a nasal cannula
- Figure 2a-d schematic sectional views of nasal cannulas with different flow resistance in the nasal tubes.
- the nasal cannula for high-flow ventilation is referenced in its entirety by the reference numeral 1.
- the nasal cannula 1 comprises case of Figure 1 from the branch off a Basiskör ⁇ by 2, a first nose pipe 3 and a second nose pipe. 4 Further, the base body 2 comprises a
- Hose connection element 6, which can be connected to a breathing tube 7.
- the nasal cannula 1 further comprises a holding element 5, with which the nasal cannula on a headband be ⁇ consolidates and thus can be attached to a face of a patient.
- the base body 2 further has a cavity 20, which is connected in a fluid-communicating manner with the first nose tube 3 and the second nose tube 4.
- the nasal tubes 3, 4 thereby represent a connection of the cavity with the environment.
- the cavity 20 is connected via the nasal tubes 3, 4 to the nostrils in a fluid-communicating manner.
- the cavity 20 has a fluidkommunipingde Verbin ⁇ dung with the hose connecting element. 6
- a breathing gas flow into the tube flows through the connecting element 6 in the nasal cannula 1 is distributed over the cavity 20 on the lugs ⁇ pipes 3 4.
- the hose connecting element 6 is arranged relative to the direction of the nose from ⁇ pipes 3, 4 laterally.
- ge ⁇ means that an air flow, which flows through the Schlauchanschlus ⁇ selement 6 in the cavity 20, within the hollow ⁇ space 20 must perform a change of direction to flow through the nasal pipes 3, 4 by.
- FIG. 2a shows a schematic sectional view through a first embodiment of a nasal cannula 1.
- the cavity 20 within the base body 2 is connected via a first end fluidkommunizie- ⁇ A passage opening 31 with the first pipe nose. 3 With the second nose tube 4, the cavity 20 is connected via the second inlet opening 41 fluidkommuniplasticd.
- the first nose pipe 3 is positioned closer to the Schlauchan gleichele ⁇ element 6 as the second nose pipe 4.
- the second Na ⁇ senrohr 3 has, starting from the second strictlysöff ⁇ voltage 41 a conically tapering portion 33 which is adjoined by a cylindrical portion 42 connects, which then opens into a second outlet opening 40 of the second nasal tube 3.
- the first outlet opening 30 and the second outlet opening 40 have the same diameter. It follows that the second inlet opening 41 is greater than the first complaintsöff ⁇ opening 31. As a result, the inner diameter of the second nasal tube 4 averaged along a second longitudinal axis 42 is greater than that along a first longitudinal axis 32 of the first nasal tube 3.
- the conically tapering portion 33 has the effect that the flow of breathing gas which flows through the second nasal tube 4 is stowed so that the flow resistance increases in the two ⁇ th nose pipe. 4 This causes a backflow into the cavity 20, so that in comparison to a nasal cannula 1, which is not formed according to the invention, a smaller flow of breathing gas flows through the second nasal pipe 4.
- the diameters of the outlet openings 30, 40 are between 1 mm and 15 mm, preferably between 2 mm and 10 mm, more preferably between 3.5 mm and 6 mm.
- the conical tapered section has an opening angle Zvi ⁇ rule 2 degrees to 6 degrees, preferably 3 degrees to 5 degrees, white ⁇ ter preferably from 4 degrees to.
- the conically tapered portion has a length of 1 mm to 6 mm, preferably ⁇ 3.5 mmm, wherein the cylindrically shaped portion of the first nose tube has a length of 5 mm to 10 mm, preferably 7.3 mm.
- the hose connection element 6 may be formed as a male or female connector.
- a ventilator ⁇ hose 7 can thus abut either outside on the hose connecting element 6 or the breathing tube 7 is introduced into the hose connecting element. 6
- Figure 2b shows a second embodiment of the invention.
- the nose pipes 3, 4 in this case have different Strömungswi ⁇ resistors, which are caused by different inner diameters of the nasal tubes 3 4.
- the inner diameter of a nose tube 3, 4 over the entire length of the respective nose tube 3, 4 is constant.
- the thickness of the tube wall of the nasal tubes 3, 4 can be variably selected according to the tube diameter, so that both nose tubes 3, 4 have the same outside diameter.
- the larger inner diameter of the first nose tube 3 relative to the smaller inner diameter of the second nose tube 4 causes the flow resistance in the second nose tube 4 is greater than in the first nose tube 3. Therefore, the breathing gas flow through the first nose tube 3 is increased relative to the second nose tube 4. Since with the same flow resistances in the first nose tube 3 and the second nose tube 4 less breathing gas flows through the first nose tube 3, by the larger selected inner diameter of the first nose tube 3 with respect to the inner diameter of the second nose tube 4 a balanced ratio of the respiratory gas flow through the first and second nose tube 3, 4 causes.
- FIG. 2c A third embodiment is shown in FIG. 2c.
- the first nose tube 3 and the second nose tube 4 in this case ent ⁇ long of the respective longitudinal axis 32, 42 each have the same inner diameter. That is, the inlet openings 31, 41 and the outlet openings 30, 40 have the same diameter.
- the second nose tube 4 has, in contrast to the first nose tube 3, a restriction member 35.
- the restriction member 35 is formed in this embodiment as an insert in the second nose tube 4.
- This insert has aterrorism notebookmes ⁇ ser corresponding to the inner diameter of the nose pipe. 4
- the insert comprises a bore which has a smaller diameter than the inner diameter of the nose tube 4. This creates a constriction in the second nose tube 4.
- the restriction member 35 By the restriction member 35, the flow resistance of the second nose tube 4 is increased.
- the first nose tube ⁇ 3 has a lower flow resistance than the second Na ⁇ senrohr 4. In this way, by means of the Restriktionsele ⁇ element 35, the air flows through the nose tubes 3, 4 are aligned with each other.
- FIG. 2 d shows a fourth embodiment of the nasal cannula 1.
- the first nose tube 3 and the second nose tube 4 in this case have the same inner diameter along the longitudinal axis.
- the first nose pipe 3 a Oberflä ⁇ chenelement 36, which has a coating and / or surface structure which reduces the friction between the air flow and the inner wall of the first tube 3 has nose.
- the surface element 36 in this case has a groove structure which reduces the flow resistance of the respiratory gas flow flowing through the first nose tube 3.
- a coating of the surface element 36 in this case has a material which has a low coefficient of friction with the inflowing air.
- the second nose tube has a surface member 43 with a Be ⁇ coating and / or surface structure that increases the flow resistance of the second nose pipe. 4
- the surface structure of the surface element 43 may have projections which generate turbulence in the respiratory gas flow through the second nose tube 4. Due to the turbulence in the breathing gas flow of the second nasal pipe 4, the flow resistance of the second nasal pipe 4 is increased.
- a coating of the surface element 36 of the second Na ⁇ senrohrs 4 may have a high coefficient of friction with the incoming air. In this way, the edges of the breathing gas flow, which flows through the second nose tube 4, are subjected to a high degree of friction with respect to the inner wall of the first nose tube 3. This increases the flow resistance of the respiratory gas flow in the second nasal pipe 4.
- the nasal cannula 1 can be combined if required so that the nose cannula 1, for example, in the second nose tube 4 has a Oberflä ⁇ chenelement 43 with a coating with a high of friction ⁇ coefficient and the first nose pipe 3, a surface member 36 with a surface structure, which has a low coefficient of friction.
- the other described embodiments may be similarly combined.
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Otolaryngology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- External Artificial Organs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016014751 | 2016-12-13 | ||
DE102017004224.1A DE102017004224A1 (de) | 2016-12-13 | 2017-05-03 | Nasenkanüle für High-Flow-Beatmung |
PCT/EP2017/081696 WO2018108670A1 (de) | 2016-12-13 | 2017-12-06 | Nasenkanüle für high-flow-beatmung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3554605A1 true EP3554605A1 (de) | 2019-10-23 |
Family
ID=60582599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17809299.5A Withdrawn EP3554605A1 (de) | 2016-12-13 | 2017-12-06 | Nasenkanüle für high-flow-beatmung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20190328991A1 (de) |
EP (1) | EP3554605A1 (de) |
CN (1) | CN110121372A (de) |
DE (1) | DE102017004224A1 (de) |
WO (1) | WO2018108670A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2583030B (en) | 2013-03-15 | 2021-01-06 | Fisher & Paykel Healthcare Ltd | Nasal cannula assemblies and related parts |
EP3030299B1 (de) | 2013-08-09 | 2020-07-01 | Fisher & Paykel Healthcare Limited | Asymmetrische nasale verabreichungselemente und kupplungen für nasale schnittstellen |
USD870269S1 (en) | 2016-09-14 | 2019-12-17 | Fisher & Paykel Healthcare Limited | Nasal cannula assembly |
DE102021113642A1 (de) | 2020-05-29 | 2021-12-02 | Drägerwerk AG & Co. KGaA | Verbindungs-Anordnung mit einem Volumenfluss-Sensor und einer Homogenisierungseinheit zur künstlichen Beatmung eines Patienten sowie ein Herstellungsverfahren |
CN213554576U (zh) * | 2020-10-14 | 2021-06-29 | 沈阳迈思医疗科技有限公司 | 一种吸氧鼻塞装置 |
WO2023067558A1 (en) * | 2021-10-22 | 2023-04-27 | Fisher & Paykel Healthcare Limited | Patient interface |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR0008650B1 (pt) * | 1999-03-03 | 2010-12-28 | dispositivo de transmissão via nasal. | |
US6799575B1 (en) * | 2001-04-21 | 2004-10-05 | Aaron Carter | Cannula for the separation of inhaled and exhaled gases |
WO2005079726A1 (en) * | 2004-02-23 | 2005-09-01 | Fisher & Paykel Healthcare Limited | Breathing assistance apparatus |
EP2928532A4 (de) * | 2012-12-07 | 2016-06-29 | Parion Sciences Inc | Nasenkanüle zur verabreichung von medikamenten in aerosolform |
EP3030299B1 (de) * | 2013-08-09 | 2020-07-01 | Fisher & Paykel Healthcare Limited | Asymmetrische nasale verabreichungselemente und kupplungen für nasale schnittstellen |
US10709861B2 (en) * | 2013-09-20 | 2020-07-14 | Fisher & Paykel Healthcare Limited | Nasal cannula with flow restrictor |
CN105992560B (zh) * | 2014-02-12 | 2019-06-04 | 皇家飞利浦有限公司 | 用于气体取样套管的低死区空间的柔性呼吸鼻部件以及制造呼吸鼻部件的方法 |
WO2016157103A1 (en) * | 2015-03-31 | 2016-10-06 | Fisher & Paykel Healthcare Limited | Nasal cannula |
-
2017
- 2017-05-03 DE DE102017004224.1A patent/DE102017004224A1/de not_active Withdrawn
- 2017-12-06 US US16/468,884 patent/US20190328991A1/en not_active Abandoned
- 2017-12-06 WO PCT/EP2017/081696 patent/WO2018108670A1/de unknown
- 2017-12-06 CN CN201780077249.4A patent/CN110121372A/zh active Pending
- 2017-12-06 EP EP17809299.5A patent/EP3554605A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CN110121372A (zh) | 2019-08-13 |
WO2018108670A1 (de) | 2018-06-21 |
US20190328991A1 (en) | 2019-10-31 |
DE102017004224A1 (de) | 2018-11-08 |
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