CN1267167C - Medical air flexible tube with internal fluid heater - Google Patents
Medical air flexible tube with internal fluid heater Download PDFInfo
- Publication number
- CN1267167C CN1267167C CN 00123789 CN00123789A CN1267167C CN 1267167 C CN1267167 C CN 1267167C CN 00123789 CN00123789 CN 00123789 CN 00123789 A CN00123789 A CN 00123789A CN 1267167 C CN1267167 C CN 1267167C
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- band
- pipe
- flexible
- heating system
- air
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Abstract
The present invention relates to an improved medical catheter which comprises a heating element to control temperature and humidity for transmitting air to patients. The present invention is provided with a flexible band which spans the width of a flexible tube and extends basically along the length of the flexible tube. The heating element is arranged in the flexible band. The heating element which is preferable to be a conducting wire or a plurality of conducting wires is connected with a power source to heat air flowing in the tube and to heat an air flow when the air flow passes above or around the heating element. The flexible band supporting the heating element can be integrated with the tube or can be a pluggable unit which can be assembled in the tube.
Description
The present invention relates generally to, temperature in conduit from gas such as air or oxygen to the patient that carry and/or humidity control, particularly, a kind of pipe that has internal heating spare is used for before patient's gas transmission is sent, and controls the wherein temperature and humidity of gas.
The defeated air of patient or other gas that use some device systems can not oneself breathe at present to a variety of causes.People's upper respiratory tract is the position of inhaled air being heated and adds humidity before the process trachea of pulmonary.The nation of a kind of breather of needs of patients that can not oneself breathe helps.Usually the air by the breather confession is come by compressor or liquid oxygen source, is exsiccant.When this air transferred to the patient of upper respiratory tract bypass, the mucous layer of lower respiratory tract and sensitive organization just were subjected to drying, so the patient has extra metabolism air heat need be arrived body temperature.The patient of long-time ventilation can not produce the mucus thromboembolism at lower respiratory tract under the situation of humidification, carry out the emergency processing sucking-off, and can cause by the damage that increases the weight of the exsiccant lower respiratory tract tissue of respiratory tract.The metabolic demand that improves has increased the weight of the burden of all physiological systems, and injures patient's the state of an illness.Therefore, be everlasting to tracheostomy tube or tracheostomy tube bypass upper respiratory tract, by before patient's gas transmission of breather, the air heat and the humidification of breather.
The air wetting process of conventional breather comprises: by water being heated to higher temperature, and make inhaled air by or flow through hot water, obtaining effective humidity, and with the water vapour/air mixture made and the hygral equilibrium of humidifier.By a breather loop flexible pipe or pipe, normally with the polyethylene hose of gauffer, with tracheostomy tube in other words tracheostomy tube be communicated with, inhaled air is incorporated into the patient.Designed the interconnection flexible pipe, formed lower resistance, light, greatly flexible passage, thus air-breathing do not need excessive firmly.This flexible pipe can with face shield or tracheostomy tube or tracheostomy tube coupling, air can be input in patient's body.
Because the general tool of breather air loop flexible pipe is at thin wall and because the large surface area of gauffer between the room air that temperature is lower around heated air stream and the flexible pipe, sizable heat exchange can take place.At the air flow of heating during through flexible pipe, some heat loss in the flexible pipe outer air, thereby in air-flow, cause temperature drop.Temperature drop in the humidifying air of flexible pipe of flowing through has reduced the ability of suspended water in the air, causes that some moisture are along the pipe range condensation.The minimizing of air-flow being attacked by dampness degree causes accumulating of in pipe wrinkle water during air cooling.If it accumulates enough minims in tracheostomy tube or tracheostomy tube, can enter in the lungs, so the water of condensation has very big danger to the patient.In addition, the water that amasss in hot flexible pipe forms the hotbed of the bacteria breed that can make respiratory tract infection.At last, on the basis of the temperature of the air that leaves breather, decrease of temperature makes the air themperature that transfers to the patient uncertain.
In order to reduce the sedimentation of water, keep a suitable temperature, the electricity consumption heating hose additionally heats to air-flow, the heat that loses on the compensation hose length.Conventional electrical heating flexible pipe or pipe use the heating member of a solid or plying resistance wire, it or be embedded in the tube wall, or twine in pipe week.In some cases, resistance wire spiral winding around a Support Level earlier, and then be wrapped in pipe week.These flexible pipes heat on wall, and heat passes to the fluid that flows through in the pipe by heat convection.In addition, heating member also can be in the bore of flexible pipe loosely string mistake.At this moment, heat is by being passed to the fluid in caliber by heating member in insulation on the heating member.
The specific question of the resistance wire element of the heater that twines for spiral is, because the variation of energy density has formed hot localised points.The variation of energy density pitch discordance on a short section heating member causes.And the pitch unanimity that keeps twining is difficult especially for manufacturer, and the method for testing and the device that need detect in the high speed extrusion process.This focus meeting burn through hose wall, and the danger of catching fire is arranged.
First purpose of the present invention provides a kind of heater, and it has overcome the shortcoming of present technology, has improved the gas transmission work in specified humidity and temperature.
Another object of the present invention provides a kind of heater, and it reduces owing to burn the phenomenon of the pipe damage that causes.
Another purpose of the present invention provides a kind of heater, and it can adapt to present gas transmission system.
A further object of the present invention provides a kind of heater, and it is than existing heating system heated air more effectively.
Realization the objective of the invention is by using a kind of flexible pipe, and it has a long flexiplast band, and it is positioned at pipe substantially in the tube hub zone, and extends on the length of pipe and the heating member by described band carrying, with heated air.A preferred embodiment of the present invention is regulated heater with thermometer on gas transmission point, to keep to the heating at the some place of patient's gas transmission and the temperature of humidifier.
According to the present invention, provide a kind of from the flexible pipe heating system of source of the gas to receiver's delivery temperature control gas, comprising: a flexible hollow tube comprises an inwall that limits an inner region; A long flat solid flexible insulation band extends near the described receiver far-end substantially from the near-end of described source of the gas in described pipe, described band has: near first and second limits and central part that is provided with in the district center in described pipe of inwall; With an electric installation, in described band, separate with described inwall, be used for when from the near-end to the far-end, flowing through gas heated air to prevent in flexible pipe, forming liquid.
According to optimal way of the present invention, described band is integrally formed with described pipe.
Preferably, described band forms a single unit system with described pipe mechanical presses.
According to optimal way of the present invention, the electric installation of described heated air comprises the conduction strap that is supported by described band.
Preferably, the electric installation of described heated air comprises the conductive strips film that is supported by described band.
According to optimal way of the present invention, the electric installation of described heated air comprises the conduction erosion paper tinsel that is supported by described band.
Preferably, described band can be rolled over with removing and be arranged in the described pipe.
Details has in the claims illustrated to it is believed that it is novel purpose of the present invention and feature.To make structure of the present invention and mode of operation below in conjunction with the description of the drawings, and other purpose and advantage are clearer and more definite.
Fig. 1 be a preferred embodiment of the invention use comprise the humidification system perspective view that produces humidifying air;
Fig. 2 is the partially cut-away side view that connects a tracheostomy tube of heating tube;
Fig. 3 is that the preferred embodiments of the present invention are partly cutd open perspective view;
Fig. 4 is the perspective section view of getting along the line that marks among Fig. 3; With
Fig. 5 is the perspective section view of the flexible band of explanation heating member of the present invention.
The following explanation that provides can make any those of ordinary skills understand and apply the invention by the best mode that the inventor understands.But for those of ordinary skills, multiple scheme is arranged obviously, because the General Principle of the present invention of this paper definition is that we provide with a kind of heater that is specially adapted to carry to the patient flexible pipe adapted of warming and humidifying air.
Fig. 1 generally illustrates a system embodiment using the defeated heated air of the present invention generally.Flexible gauffer pipe 20 by suitable material manufacture such as polyethylene forms passage from humidifying air to the patient that fail.Flexible pipe 20 connects an air wetting machine 102, the second ends 24 and connects tracheostomy tube (see figure 2) or tracheostomy tube at " Y " type joint 25 places on pipe joint 23, or sometimes, connects a face shield that places patient's oral area.102 heating of air wetting machine and humidifying air make it be suitable for the patient and accept.
See Fig. 1, water supply tank 104 connects the pipe 106 on the hot plate (not shown) in the water air supply humidifier 102.Hot plate is contained in the chamber 112, and water temperature is improved, and enough quantity of steams are escaped in the chamber 112.What connect the breather (not shown) fails air (or other gas that will fail) for air hose 100 to chamber 112, meets with water vapour in chamber 112.The air that enters chamber 112 mixes with water vapour, and is heated to temperature controlled temperature by plate by the water vapour that exists.Outlet 114 heating also the air of " humidification " leave chamber 112, enter pipe 20 pipe joint 22.
On the inlet of pipe 20 adapter 26 (seeing 3 figure) is arranged, its incorporating interconnecting adapter 122 also has a cable 116 of drawing from the controller/display of humidifier 102, accepts the voltage of controller/display.Adapter 26 is by 30 connections of being with of stretching out or being installed to opening 32 from opening 32.Adapter 26 is with in 34 or by being electrically connected with 34 heating members 42 that support.As detailed below, flexibility is with the heating member 42 of temperature and humidity in the 34 support and control pipes 20.
Pipe 20 is 112 air of accepting humidification from the chamber, and air flows along the length of pipe.Pipe has plastic tape 34 in 20, it be have enough flexibilities and can be together crooked with pipe 20, but enough hard to keep its appearance profile when the bending.Flexibility is with 34 to have a kind of profile (see figure 4), and it is to reaching pipe 20 inwall 38, has enough surpluses and is with 34 to slip into and skid off to pipe to allow flexibility, but keep flexible band and to manage 20 concentric.Flexible band also can be other profile, and as the prismatoidal section configuration with three limits, but cardinal principle planar profile as shown in Figure 2 is more suitable, and is flexible preferably because it has than more complicated profile.Preferably flexibility is plastics manufacturings by higher melt with 34, and plastics are prescription polyethylene similar to the hose material composition preferably.
Be equipped with one near the flexible band section center and be used for heating tube 20 fluidic heating members 42.Heating member 42 preferably is contained in flexibility with in 34 or top solid resistance wire.Heating member 20 can flexibility with 34 top on, or in a preferred embodiment, heating member 42 is compressed in the flexible band (Fig. 4), but as long as band is thin that the heat that is enough to heating member is produced passes in the fluid just passable.Can use single line 42a to run through flexibility with 34 length, or also can be with many line 42b, 42c and 42d (see figure 5).By can serial or parallel connection, or the connection in series-parallel combination, constitute the resistance of a required whole heater circuit with 42 lines 42 that support or other electric-conductor.Preferably heating member 42 begins and stops at single end, is with 34 to form a loop or a plurality of loops along flexibility, and making can be at this single end connection power supply.
As mentioned above, heating member 42 is connected on the power supply in air wetting machine 102 via cable 116 (see figure 6)s.The voltage that adds produces electric current in heating member, electric current produces heat by the resistance of line.The heat energy that heating member 42 produces passes to along in the pipe 20 mobile humidifying airs.The voltage that adds to heating member 42 is high more, and is big more to the heat of fluid confession, and the scalable heat has suitable temperature to remain in the outlet 24.Make the overall length of heating member 42 extend through pipes, make and heated air always, reduce the probability of humidifying air condensation up to patient's gas transmission place.For further controlling the temperature of the air of failing to the patient, on " Y " type joint 25 in the outlet 24 of pipe 20, a hygrosensor 118 is set, measure the outlet temperature of the air of failing to the patient.Through cable 124 this temperature signal is transferred to controller/display in humidifier 102, regulates power then, so that keep the outlet temperature of wishing to heating member 42 or hot plate power supply.
Pipe stops on " Y " type joint 25, or also can stop on the T-shape joint, and it is plastics preferably, and " Y " type joint is connected to an air delivery device, as the tracheostomy tube among Fig. 2 130.Also can be other gas transmission system, as breathing mask or tracheostomy tube etc., these gas transmission systems each to operate in technical be known.
Emit the air that the patient breathes out by pipe 21, it also can comprise and manage 20 similar heating members.This is because the air that the patient sends is a humidification, has the problem that produces condensed water and cause bacterial reproduction and maintenance equally in the waste side of pipe.
The present invention's heating member looser than prior art aspect several is superior.In flexible pipe, exist to intend laminar air stream, have main air flow near the center of flexible pipe.Air velocity curve in pipe 20 also illustrates, and there is peak flow rate (PFR) in the district along tube hub, radially is reduced to the minimum at tube wall 38 places.The position of heating member 42 is at the center of air flow, and this has guaranteed to more effectively conducting heat by the caliber flow air.Heating member 42, by the heat exchange of most of air promotion flowing and is reinforced to the efficient of the heat exchange of air flow.If there is not the support of heating member, as flexible band of the present invention, just the position that can not guarantee heating member is at tube hub, heater near or lean against on the hose inner wall and will produce inadequate heat transfer.The result is that it is more than the heat that passes to air to pass to tube wall, and partial condensation can take place.And contacting the tube wall place at heating member might become dangerous bum-through-point, and may light a fire.
In the present invention, by being with 34 to support, heating member 42 keep leaving the breather loop hose wall 38 and near the air flow center.It is minimum dispersing locational temperature at the locational height of high velocity air, because heat is scattered along support belt by conduction, and is scattered by the surrounding air convection current.Therefore, by heating member 42 is supported on the air-flow center, at the air-flow center dissipation of heat that sheds is opened, energy shifts maximum, makes the probability of fusing flexible pipe or heater insulation reduce to minimum.
In another embodiment, heating member can be a resistance wire, and its spiral on support member twines, and is compressed in the similar plastic supporting structure.Structure and electrical connection are similar to the aforementioned embodiment.It should be understood that with the etched foil of conductive strips, straight line or crooked shape or in band, add or embed the resistance unit of conducting film form, also can realize conducting heat and being electrically connected.
Those of ordinary skills should be understood that and not leave the variation that spiritual scope of the present invention can constitute all above preferred embodiments.Therefore, in the claim scope, the present invention can be different from the mode of this explanation and implement.
Claims (16)
1. one kind from the flexible pipe heating system of source of the gas to receiver's delivery temperature control gas, comprising:
A flexible hollow tube comprises an inwall that limits an inner region;
A long flat solid flexible insulation band extends near the described receiver far-end substantially from the near-end of described source of the gas in described pipe, described band has: near first and second limits and central part that is provided with in the district center in described pipe of inwall; With
An electric installation separates with described inwall in described band, is used for when flowing through gas from the near-end to the far-end heated air to prevent forming liquid in flexible pipe.
2. heating system according to claim 1 is characterized in that described band is fixed in the described pipe.
3. heating system according to claim 2 is characterized in that described band is integrally formed with described pipe.
4. heating system according to claim 3 is characterized in that, described band forms a single unit system with described pipe mechanical presses.
5. heating system according to claim 1 is characterized in that, the electric installation of described heated air comprises a conductor wire.
6. heating system according to claim 5 is characterized in that, described conductor wire is to be squeezed in the described band.
7. heating system according to claim 1 is characterized in that, described conductor wire is from the near-end to the far-end and turn back to near-end and extend along described band, so that can form an electric loop on the near-end of described band.
8. heating system according to claim 5 is characterized in that, the electric installation of described heated air comprises substantially many conductor wires from the near-end of described band to remote extension.
9. heating system according to claim 1 is characterized in that, described band is by the polyethylene manufacturing.
10. heating system according to claim 1 is characterized in that, the electric installation of described heated air comprises the conduction strap that is supported by described band.
11. heating system according to claim 1 is characterized in that, the electric installation of described heated air comprises the conductive strips film that is supported by described band.
12. heating system according to claim 1 is characterized in that, the electric installation of described heated air comprises the conduction erosion paper tinsel that is supported by described band.
13. heating system according to claim 1 is characterized in that, described band removably is arranged in the described pipe.
14. an improvement system that carries warming and humidifying gas to the patient comprises:
A device that produces humidified gases;
Carry the device of described humidified gases by a flexible conduit for one;
A flexible conduit has an inwall, and first end of described flexible pipe connects the device of described generation humidified gases;
One is located at inner heating member, substantially run through flexible conduit, described heating member and described flexible conduit inwall separate, and make heat pass the air flow to the air velocity maximum, heating member comprises: the flexible band of long flat solid ambroin, and its width passes interior center; With a heat generating member, enough heats are provided in solid band, prevent that the gas of humidification from separating out liquid in flexible pipe.
15. system according to claim 14 is characterized in that, solid band is a polyvinyl resin.
16. a system that carries humidified gases under the temperature of control comprises:
A humidifier provides a kind of humidified gases;
The hollow pipe of a flexible gauffer has an inwall that limits an inner region, and an end connects the gas that humidifier is accepted humidification;
The solid ambroin band of long flat flexible, width is about the width of pipe, is arranged in inwall, and the central part of band is on the center of hollow pipe;
An electric heat generating components extends along band and in band, and the gas that is used for warming and humidifying is to prevent forming liquid at flexible pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123789 CN1267167C (en) | 2000-09-06 | 2000-09-06 | Medical air flexible tube with internal fluid heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123789 CN1267167C (en) | 2000-09-06 | 2000-09-06 | Medical air flexible tube with internal fluid heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1341463A CN1341463A (en) | 2002-03-27 |
| CN1267167C true CN1267167C (en) | 2006-08-02 |
Family
ID=4590137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00123789 Expired - Fee Related CN1267167C (en) | 2000-09-06 | 2000-09-06 | Medical air flexible tube with internal fluid heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267167C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141752A (en) * | 2006-11-08 | 2019-08-20 | 瑞思迈私人有限公司 | The conduit used in breathing equipment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10213571B2 (en) * | 2011-05-06 | 2019-02-26 | Fisher & Paykel Healthcare Limited | Component for medical circuit |
| WO2014111083A1 (en) * | 2013-01-15 | 2014-07-24 | W.O.M. World Of Medicine Gmbh | Insufflation tube comprising a humidifying material and a heating element, for laparoscopy |
| AU2014230083B2 (en) * | 2013-03-15 | 2019-07-25 | Fisher & Paykel Healthcare Limited | Components for medical circuits |
| CA3176263A1 (en) * | 2013-12-20 | 2015-06-25 | Fisher & Paykel Healthcare Limited | Humidification system connections |
| US10596345B2 (en) * | 2014-12-31 | 2020-03-24 | Vapotherm, Inc. | Systems and methods for humidity control |
| CN106823094A (en) * | 2017-02-13 | 2017-06-13 | 赵淑玲 | A kind of emergency care inhalation device |
| CN112827043A (en) * | 2020-12-28 | 2021-05-25 | 北京谊安医疗系统股份有限公司 | Anti-condensation heating breathing pipeline |
-
2000
- 2000-09-06 CN CN 00123789 patent/CN1267167C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141752A (en) * | 2006-11-08 | 2019-08-20 | 瑞思迈私人有限公司 | The conduit used in breathing equipment |
| CN110141752B (en) * | 2006-11-08 | 2022-03-04 | 瑞思迈私人有限公司 | Catheter for use in a respiratory device |
| US11338104B2 (en) | 2006-11-08 | 2022-05-24 | ResMed Pty Ltd | Humidifier for respiratory apparatus |
| US11712535B2 (en) | 2006-11-08 | 2023-08-01 | ResMed Pty Ltd | Humidifier for respiratory apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1341463A (en) | 2002-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SMITH MEDICAL TREATMENT BUILDING CO.,LTD. Free format text: FORMER OWNER: AUXILIARY RESPIRATORY PRODUCTS CO. Effective date: 20070831 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070831 Address after: Massachusetts USA Patentee after: Smith Medical Construction Co Address before: American California Patentee before: Respiratory Support Products, Inc. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060802 Termination date: 20160906 |
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| CF01 | Termination of patent right due to non-payment of annual fee |