GB2341101A - A breathing indicator device - Google Patents
A breathing indicator device Download PDFInfo
- Publication number
- GB2341101A GB2341101A GB9919546A GB9919546A GB2341101A GB 2341101 A GB2341101 A GB 2341101A GB 9919546 A GB9919546 A GB 9919546A GB 9919546 A GB9919546 A GB 9919546A GB 2341101 A GB2341101 A GB 2341101A
- Authority
- GB
- United Kingdom
- Prior art keywords
- indicator
- assembly
- housing
- connector
- indicator assembly
- 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.)
- Granted
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
- A61M16/08—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
- A61M16/04—Tracheal 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
- 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
- A61M16/0434—Cuffs
-
- 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
- A61M16/0402—Special features for tracheal tubes not otherwise provided for
- A61M16/0411—Special features for tracheal tubes not otherwise provided for with means for differentiating between oesophageal and tracheal intubation
- A61M2016/0413—Special features for tracheal tubes not otherwise provided for with means for differentiating between oesophageal and tracheal intubation with detectors of CO2 in exhaled gases
Abstract
An indicator 3 for a respiration device, preferably an endotracheal tube, to detect patient breathing is disclosed. One end 20 of a housing 2, preferably a transparent plastic connector, is adapted to connect to a respiration device and an indicator assembly is detachably secured in the opposite machine end 22. Preferably the indicator assembly is a frame 30, supporting an indicator element 31 extending within a lumen of the housing. The indicator element may be paper including a carbon dioxide colour change indicator chemical. Preferably a handle 39 on the frame 30 extends along the outside of the housing 2 so that the indicator 3 can be removed. Whilst the indicator 3 is fitted it prevents another connector from being attached to the housing 2.
Description
2341101 RESPIRATION ASSEMBLIES AND INDICATORS This invention relates to
respiration assemblies and to indicators.
The invention is more particularly concerned with assemblies with provision for detecting correct placement of an endotracheal tube or for indicating patient breathing.
One of the major problems associated with the use of an endotracheal tube is that of ensuring that the patient end of the tube is correctly located in the trachea and not in the oesophagus. There are various ways in which correct intubation can be detected. The usual way is to connect the machine end of the tube to a capnograph, which is responsive to the levels of carbon dioxide. When the tube is correctly inserted, the level of carbon dioxide detected will rise and fall with the patient's breathing. By detecting this alternating level of carbon dioxide, correct intubation is indicated. If the tube is incorrectly inserted, in the oesophagus, any carbon dioxide produced by the digestive system will be at a relatively steady level. Capnographs can produce a reliable indication of correct intubation but the equipment is relatively bulky and expensive so it is only available in well-equipped surgical operating theatres.
An alternative device can be used to detect carbon dioxide, which includes a chemical colour-change indicator, such as described in, for example, W096/24054, EP509998, US5005572, US4879999, EP257916, US4691701, US4790327, W089/07956, GB2218515 and US4728499. This form of device usually comprises a paper or some other substrate that 2 is impregnated or coated with the chemical including a pH-sensitive indicator dye, the substrate preferably being provided in some form of transparent connector attached to the machine end of the tube. Such indicators can be of low cost and can provide a clear indication that the tube has been correctly inserted. If the indicator fails to change colour, the clinician knows immediately that the tube has been incorrectly inserted. These prior indicators are designed to be left in position on the connector during use of the tube. This can, however, be a disadvantage because, to be effective, the indicator must be exposed to the maximum gas flow, thereby inevitably providing some impediment to gas flow. Also, where the indicator is positioned in the main gas flow path, this may prevent access to the tube, such as by a suction catheter or the like.
It is also useful in some circumstances to have a readily visible indicator confirming that the patient is breathing on other respiration devices, such as face masks or the like.
It is an object of the present invention to provide an improved respiration assembly and indicator.
According to one aspect of the present invention there is provided a respiration assembly including a respiration device, a housing mounted with the respiration device and an indicator assembly mounted in the housing, the indicator assembly having an indicator element mounted to extend within a lumen through the housing, and the indicator assembly being detachably secured in the housing such that the indicator assembly can be removed from the machine end of the housing.
3 The housing is preferably of a transparent plastics material and is preferably a connector. Ile indicator assembly is preferably shaped to prevent the connector mating with another connector while the indicator assembly is secured with the connector. The indicator assembly may be a push fit in the machine end of the housing. The indicator assembly preferably comprises a frame and an indicator element supported on the frame. The frame may comprise a circular ring attached coaxially with one end of the housing and a projecting member extending substantially axially of the housing, the indicator element being supported on the projecting member. The indicator element is preferably of a paper including a carbondioxide colour-change indicator chemical. The indicator assembly preferably includes a handle extending along the outside of the housing by which the indicator assembly can be gripped to remove it from the housing. The respiration device may be an endotracheal tube.
According to another aspect of the present invention there is provided an indicator for indicating patient breathing, the indicator having an outer housing adapted for connection at one end to a respiration device and an indicator assembly detachably secured in the housing and removable from the opposite end of the housing.
According to a fiirther aspect of the present invention there is provided a method of determining correct intubation of a patient comprising the steps of introducing into the trachea of the patient an endotracheal tube assembly of the End including an endotracheal 4 tube, a connector mounted at the patient end of the tube and an indicator assembly mounted in the connector, observing the indicator assembly to ensure correct intubation, and 4 subsequently removing the indicator assembly from the connector while leaving the connector in position on the tube.
An endotracheal tube assembly and its method of use, in accordance with the present invention, will now be described, by way of example, in which:
Figure 1 is a side elevation view of the assembly; Figure 2 is a perspective view of a part of the assembly to a larger scale; Figure 3 is a sectional side elevation view of the part shown in Figure 2; Figure 4 is an exploded, perspective view of the part shown in Figures 2 and 3; Figure 5 is a perspective view of an alternative part of the assembly; and Figure 6 illustrates steps in the use of the assembly.
With reference first to Figure 1, the assembly comprises an endotracheal tube 1, a connector 2 mounted in the machine end of the tube, and an indicator assembly 3 mounted in the connector.
The endotracheal tube I is of conventional construction, comprising a curved tubular shaft 10 with an inflatable cuff 11 encircling the shaft close to the open, patient end 12. The machine end 14 of the tube I is also open and is securely connected to the connector 2, which is shown in more detail in Figures 2 to 4, and takes the form of a breathing indicator.
The connector 2 is moulded from a rigid, transparent plastics material and has a tapered forward end 20 of relatively small diameter, which is a push fit within the machine end 14 of the tube I and may be bonded to it by means of a solvent or adhesive. Midway along its length, the connector has a radially-projecting flange 2 1, which divides the forward end 20 from the rear or machine end 22. The rear end 22 is enlarged with an external diameter of 15mm and a shallow luer taper adapted to receive a cooperating female tapered connector. The interior of the forward and rear ends 20 and 22 communicate with one another, forming a bore or lumen 24 through the connector.
The indicator assembly 3 comprises a moulded plastic support fi=e 30 and an indicator element 31 retained on the frame. The fi-ame 30 has an outer, circular ring 32, which, in section is of angled shape, having a horizontal portion 33, which sits coaxially on the end of the rear end 22 of the connector 2 providing a housing for the assembly 3. The frame 30 has a vertical portion 34, which is a tight fit within the rear end of the connector and may have barbs or fins to improve the grip on the inside of the connector 2. The fi-ame 30 also has a lateral bar 36 extending diametrically across the ring 32, the central part of the bar being bent down or forwardly into a V-shape formation 37, projecting axially of the connector 2. The underside of the bar 36 has two fixing lugs 38 with arrow-shape heads projecting down 6 on opposite sides of the V-shape formation 37. The fi-ame 30 also has a lever 39 of rectangular shape attached with the outside of the ring 32 by two reduced thickness hinge portions 40. The lever 39 normally extends down or forwardly along the outside of the rear part 22 of the connector 2.
The indicator assembly 3 is completed by the indicator element 3 1. The indicator element 31 is a strip of paper into which is absorbed a conventional carbon dioxide colourchange indicator chemical, which may be of the kind described in any of the patents referred to in the introduction. The indicator strip 31 is bent to form a central V-shape portion 40 conforming to the shape of the V-shape formation 37 on the frame 30. The ends 41 of the strip 31 extend horizontally outwardly and have fixing holes 42 shaped and positioned to receive the heads of the fixing lugs 38. The strip 31 is mounted underneath the lateral bar 36, with the V-shape portion 40 extending around the V-shape formation 37 on the bar 36 and with the ends 41 being retained by the fixing lugs 38. The indicator strip 31 extends across the lumen 24 of the connector 2, with the lower, central portion 40 projecting down within the connector along a major part of the length of its rear end 22. The dimensions of the indicator assembly 3 and the indicator strip 31 are such that the strip is clearly visible through the wall of the connector 2, whilst allowing air to flow along the lumen 24 of the connector.
Me indicator assembly 3 is removable from the rear end of the connector 2, as shown in Figure 4, by gripping the lower end of the lever 39, lifting this up so that it hinges about the hinge portions 40, and then pulling the indicator by the lever rearwardly out of the connector.
7 1. ' There are various other ways in which a similar indicator assembly could be attached to a connector instead of by the push, friction fit described above. For example, the indicator assembly and connector could be threaded so that the indicator assembly is removed by unscrewing. Alternatively, the indicator assembly and connector could have cooperating surface formations that snap fit together. In other arrangements, the indicator assembly could be attached with the connector by a tear seal, or by a spot or tack weld. A flirther arrangement is shown in Figure 5 where the indicator assembly 3' has a hinged or flexible clip 39' that fastens over a lug 2Pprojecting outwardly of the connector T.
In use, the assembly is supplied with the connector 2 and indicator assembly 3 ready fitted in the machine end 14 of the tube 1, so that the clinician can readily insert the tube into the patient without the need for further assembly. If the tube 1 is correctly inserted with its. patient end 12 located in the trachea, the indicator assembly 3 will be exposed to the patient's inhaled and exhaled breath flowing along the tube. Because the exhaled breath contains a relatively high concentration of carbon dioxide, this causes the indicator strip 31 to change colour during exhalation. When the patient inhales, the colour of the strip 31 changes back towards its normal colour. In this way, the colour of the indicator strip 31 alternates with the patierifs breathing. The clinician observes the indicator assembly 3 and, when this confirms correct intubation, he inflates the cuff 11 to seal the tube 1 with the trachea and to retain it in position. He then removes the indicator assembly 3 by pulling it out of the connector 2 in the 1 way described above, and as shown in Figure 6, so as to maximize the passage through the connector and enable access by a suction catheter or the like should this be necessary. If the patient is breathing spontaneously, the connector 2 may be left open. If assisted ventilation is needed, the connector 2 can be connected to a cooperating male connector 50 connected to ventilation tubing 51 extending to ventilation equipment (not shown). If the indicator assembly 3 were left in place, itwould prevent connection by the ventilation connector 50; this ensures that the indicator assembly is removed before connection.
The invention could be used with other respiration devices than endotracheal tubes. For example, an indicator according to the invention could be provided on a face mask to indicate patient breathing.
9
Claims (15)
- A respiration assembly including a respiration device, a housing mounted with the respiration device and an indicator assembly mounted in said housing, wherein said indicator assembly has an indicator element mounted to extend within a lumen through said housing, and wherein the indicator assembly is detachably secured in said housing such that said indicator assembly can be removed from the machine end of said housing.
- 2. An assembly according to Claim 1, wherein said housing is of a transparent plastics material.
- 3. An assembly according to Claim I or 2, wherein said housing is a connector.
- 4. An assembly according to Claim 3, wherein said indicator assembly is shaped to prevent said connector mating with another connector while the indicator assembly is secured with the connector.
- 5. An assembly according to any one of the preceding claims, wherein the indicator assembly is a push fit in the machine end of the housing.
- 6. An assembly according to any one of the preceding claims, wherein the indicator assembly comprises a frame and an indicator element supported on the frame.
- 7. An assembly according to Claim 6, wherein the fi-ame comprises a circular ring attached coaxially with one end of said housing and a projecting member extending substantially axially of the housing, and wherein said indicator element is supported on said projecting member.
- 8. An assembly according to Claim 6 or 7, wherein said indicator element is of a paper including a carbon dioxide colour-change indicator chemical.
- 9. An assembly according to any one of the preceding claims, wherein the indicator assembly includes a handle extending along the outside of the housing by which the indicator assembly can be gripped to remove it from the housing.
- 10. An assembly according to any one of the preceding claims, wherein the respiration device is an endotracheal tube.
- 11. An indicator for indicating patient breathing, wherein the indicator has an outer housing adapted for connection at one end to a respiration device and an indicator assembly detachably secured in said housing and removable from the opposite end of the housing.
- 12. A method of determining correct intubation of a patient comprising the steps of introducing into the trachea of the patient an endotracheal tube assembly of the kind including an endotracheal tube, a connector mounted at the patient end of the tube and an indicator assembly mounted in said connector, observing said indicator assembly to ensure correct intubation, and subsequently removing said indicator assembly from said connector while leaving said connector in position on said tube.
- 13. An endotracheal tube assembly substantially as hereinbefore described with reference to Figures 1 to 4 and Figure 6 of the accompanying drawings.
- 14. An endotracheal tube assembly substantially as hereinbefore described with reference to Figures 1 to 4 and Figure 6, as modified by Figure 5 of the accompanying drawings.
- 15. Any novel and inventive feature or combination of features as hereinbefore described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9819089.5A GB9819089D0 (en) | 1998-09-02 | 1998-09-02 | Respiration assemblies and indicators |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9919546D0 GB9919546D0 (en) | 1999-10-20 |
GB2341101A true GB2341101A (en) | 2000-03-08 |
GB2341101B GB2341101B (en) | 2003-01-22 |
Family
ID=10838200
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9819089.5A Ceased GB9819089D0 (en) | 1998-09-02 | 1998-09-02 | Respiration assemblies and indicators |
GB9919546A Expired - Fee Related GB2341101B (en) | 1998-09-02 | 1999-08-19 | Respiration assemblies and indicators |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9819089.5A Ceased GB9819089D0 (en) | 1998-09-02 | 1998-09-02 | Respiration assemblies and indicators |
Country Status (5)
Country | Link |
---|---|
US (1) | US6378522B1 (en) |
JP (1) | JP4177938B2 (en) |
DE (1) | DE19940160B4 (en) |
FR (1) | FR2782646B1 (en) |
GB (2) | GB9819089D0 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6502573B1 (en) * | 2001-11-15 | 2003-01-07 | Mercury Enterprises, Inc. | Portable single patient use carbon dioxide detector |
US20040089305A1 (en) * | 2002-11-13 | 2004-05-13 | Vallarta John-Eric S. | Endotracheal tube safety device connector |
US6709403B1 (en) | 2003-01-07 | 2004-03-23 | Mercury Enterprises, Inc. | Manometer CO2 detector combination |
US6854334B2 (en) * | 2003-01-28 | 2005-02-15 | Mercury Enterprises, Inc. | Negative inspiratory force manometer apparatus |
US6854694B1 (en) | 2003-11-03 | 2005-02-15 | Wayne Van Etten | Tube retainer |
US8062221B2 (en) | 2005-09-30 | 2011-11-22 | Nellcor Puritan Bennett Llc | Sensor for tissue gas detection and technique for using the same |
US20070083094A1 (en) * | 2005-10-11 | 2007-04-12 | Colburn Joel C | Medical sensor and technique for using the same |
US20070106134A1 (en) | 2005-11-10 | 2007-05-10 | O'neil Michael P | Medical sensor and technique for using the same |
DE102005055326A1 (en) * | 2005-11-11 | 2007-05-16 | Storz Karl Gmbh & Co Kg | Connector tube fitting for a medical suction or flushing assembly has outer arrow-shaped profile |
GB0613213D0 (en) * | 2006-07-04 | 2006-08-09 | Smiths Group Plc | Detectors |
US8420405B2 (en) * | 2006-09-25 | 2013-04-16 | Covidien Lp | Carbon dioxide detector having borosilicate substrate |
US8449834B2 (en) * | 2006-09-25 | 2013-05-28 | Covidien Lp | Carbon dioxide detector having borosilicate substrate |
US8431088B2 (en) * | 2006-09-25 | 2013-04-30 | Covidien Lp | Carbon dioxide detector having borosilicate substrate |
US8431087B2 (en) * | 2006-09-25 | 2013-04-30 | Covidien Lp | Carbon dioxide detector having borosilicate substrate |
US20080077035A1 (en) * | 2006-09-25 | 2008-03-27 | Baker Clark R | Carbon dioxide-sensing airway products and technique for using the same |
US8396524B2 (en) * | 2006-09-27 | 2013-03-12 | Covidien Lp | Medical sensor and technique for using the same |
US20090165801A1 (en) * | 2007-12-31 | 2009-07-02 | Nellcor Puritan Bennett Llc | Carbon dioxide detector having an acrylic based substrate |
US20090246797A1 (en) * | 2008-03-28 | 2009-10-01 | Nellcor Puritan Bennett Llc | Medical device for the assessment of internal organ tissue and technique for using the same |
US8256414B2 (en) * | 2009-05-26 | 2012-09-04 | Mercury Enterprises, Inc. | Neonatal colorimetric carbon dioxide detector |
US20100310425A1 (en) * | 2009-06-05 | 2010-12-09 | Piper Medical, Inc. | Real-time indicator detector |
US20110124115A1 (en) * | 2009-11-24 | 2011-05-26 | Piper Medical Inc | Indication enhanced colorimetric detector |
US20120048278A1 (en) * | 2010-08-24 | 2012-03-01 | Anthony John Yasick | Oropharyngeal and nasopharyngeal airway having a breathing indicator |
US9072851B2 (en) * | 2011-11-30 | 2015-07-07 | Covidien Lp | Tracheal tube with facility to view inner cannula |
JP5836304B2 (en) | 2013-03-28 | 2015-12-24 | 株式会社フジクラ | Tracheal tube |
KR101983786B1 (en) * | 2017-04-26 | 2019-05-29 | 사회복지법인 삼성생명공익재단 | Tongue displacement apparatus |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4691701A (en) * | 1986-07-28 | 1987-09-08 | Tudor Williams R | Carbon dioxide detector |
US4821710A (en) * | 1986-07-30 | 1989-04-18 | Theodor Greunwald | Adaptor to endotracheal tube |
WO1990001695A1 (en) * | 1988-07-29 | 1990-02-22 | Mallinckrodt, Inc. | Carbon dioxide indicator |
GB2264869A (en) * | 1992-03-02 | 1993-09-15 | Richard Charles Carter | Apparatus for identifying tracheal intubation or tracheal tube blockage |
US5367292A (en) * | 1990-06-18 | 1994-11-22 | Istvan Szoke | Warning apparatus for a tracheotomy tube |
US5517985A (en) * | 1993-04-08 | 1996-05-21 | Kirk; Gilbert M. | Carbon dioxide detector and shield |
WO1997014464A1 (en) * | 1995-10-20 | 1997-04-24 | Nellcor Puritan Bennett Incorporated | Pediatric endotracheal apparatus |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4852564A (en) * | 1984-06-28 | 1989-08-01 | Sheridan Catheter Corp. | Flexible connectors for medico-surgical tubes |
JPH0647010B2 (en) | 1986-03-26 | 1994-06-22 | ボ−ド・オブ・リ−ジエンツ、ザ・ユニバ−シテイ−・オブ・テキサス・システム | Endotracheal device |
US4994117A (en) * | 1986-08-13 | 1991-02-19 | Fehder Carl G | Quantitative carbon dioxide detector |
US4728499A (en) | 1986-08-13 | 1988-03-01 | Fehder Carl G | Carbon dioxide indicator device |
US4790327A (en) | 1987-07-27 | 1988-12-13 | George Despotis | Endotracheal intubation device |
US5197464A (en) * | 1988-02-26 | 1993-03-30 | Babb Albert L | Carbon dioxide detection |
US5005572A (en) | 1988-02-26 | 1991-04-09 | Brigham & Women's Hospital | CO2 indicator and the use thereof to evaluate placement of tracheal tubes |
AU3280289A (en) * | 1988-02-26 | 1989-09-22 | Brigham And Women's Hospital | Co2 indicator for placement of tracheal tubes |
AU3347189A (en) | 1988-02-26 | 1989-09-22 | Meridian Medical Corporation | Carbon dioxide detection |
US4919127A (en) * | 1988-05-03 | 1990-04-24 | Pell Donald M | Endotracheal tube connector |
GB8922049D0 (en) | 1989-09-29 | 1989-11-15 | Medical Instrumentation Consul | Carbon dioxide monitor |
US5279289A (en) * | 1991-10-15 | 1994-01-18 | Kirk Gilbert M | Resuscitator regulator with carbon dioxide detector |
US5421325A (en) * | 1992-04-30 | 1995-06-06 | Cinberg; James Z. | Endotracheal tube assembly and related method |
SE504069C2 (en) | 1995-02-03 | 1996-10-28 | Icor Ab | Colorimetric device for indicating carbon dioxide |
US5749358A (en) * | 1996-10-10 | 1998-05-12 | Nellcor Puritan Bennett Incorporated | Resuscitator bag exhaust port with CO2 indicator |
-
1998
- 1998-09-02 GB GBGB9819089.5A patent/GB9819089D0/en not_active Ceased
-
1999
- 1999-08-19 GB GB9919546A patent/GB2341101B/en not_active Expired - Fee Related
- 1999-08-25 DE DE19940160A patent/DE19940160B4/en not_active Expired - Fee Related
- 1999-08-27 FR FR9910922A patent/FR2782646B1/en not_active Expired - Fee Related
- 1999-08-31 US US09/386,227 patent/US6378522B1/en not_active Expired - Fee Related
- 1999-09-02 JP JP24817499A patent/JP4177938B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4691701A (en) * | 1986-07-28 | 1987-09-08 | Tudor Williams R | Carbon dioxide detector |
US4821710A (en) * | 1986-07-30 | 1989-04-18 | Theodor Greunwald | Adaptor to endotracheal tube |
WO1990001695A1 (en) * | 1988-07-29 | 1990-02-22 | Mallinckrodt, Inc. | Carbon dioxide indicator |
US5367292A (en) * | 1990-06-18 | 1994-11-22 | Istvan Szoke | Warning apparatus for a tracheotomy tube |
GB2264869A (en) * | 1992-03-02 | 1993-09-15 | Richard Charles Carter | Apparatus for identifying tracheal intubation or tracheal tube blockage |
US5517985A (en) * | 1993-04-08 | 1996-05-21 | Kirk; Gilbert M. | Carbon dioxide detector and shield |
WO1997014464A1 (en) * | 1995-10-20 | 1997-04-24 | Nellcor Puritan Bennett Incorporated | Pediatric endotracheal apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE19940160A1 (en) | 2000-03-09 |
US6378522B1 (en) | 2002-04-30 |
JP2000070371A (en) | 2000-03-07 |
FR2782646A1 (en) | 2000-03-03 |
JP4177938B2 (en) | 2008-11-05 |
GB2341101B (en) | 2003-01-22 |
DE19940160B4 (en) | 2008-01-17 |
GB9919546D0 (en) | 1999-10-20 |
FR2782646B1 (en) | 2002-05-03 |
GB9819089D0 (en) | 1998-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6378522B1 (en) | Respiration assemblies and indicators | |
US7140370B2 (en) | Endotracheal tube system and method of use | |
US5487731A (en) | Esophageal intubation detector with indicator | |
CA1286958C (en) | Carbon dioxide detector | |
US6584974B1 (en) | Patient esophageal detector device in combination with a carbon dioxide detector | |
US6502573B1 (en) | Portable single patient use carbon dioxide detector | |
EP0768903B1 (en) | A fibreoptic intubating laryngeal mask airway | |
US20080210235A1 (en) | Intubation detector | |
JPH02283378A (en) | Respirator | |
US5488944A (en) | Surgical drape support | |
GB2405100A (en) | Resuscitator with carbon dioxide indicator on exhaust air diverter | |
US4677987A (en) | Gas sampling apparatus for capnography | |
US7017578B2 (en) | Endotracheal tube system and method of use | |
AU2017328060B2 (en) | Ventilation mask | |
CN210904500U (en) | Trachea cannula connects convenient to last carbon dioxide of monitoring respiration | |
EP2035812B1 (en) | Respiratory assembly including a carbon dioxide detector | |
US20050235998A1 (en) | Endotracheal tube system and method of use | |
WO2002056933A2 (en) | Apparatus and method for selective positioning of feeding tubes | |
WO1995011716A1 (en) | Integrated end tidal carbon dioxide monitor and endotracheal tube | |
Omoigui et al. | Blind nasal intubation with audio-capnometry | |
CN211299979U (en) | Straight type multi-cavity high-frequency medical whistle assisting in judging position of connecting pipe conduit | |
CN216824408U (en) | Tracheal catheter capable of quickly judging position | |
US11357942B1 (en) | Insertion guide for endotracheal tube | |
CN216169264U (en) | Oropharynx breather pipe convenient to monitor end-expiratory carbon dioxide concentration | |
WO2007050051A2 (en) | Improved endotracheal tube system and method of use |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110819 |