WO1991012845A1 - Tracheal tube assemblies - Google Patents
Tracheal tube assemblies Download PDFInfo
- Publication number
- WO1991012845A1 WO1991012845A1 PCT/GB1991/000235 GB9100235W WO9112845A1 WO 1991012845 A1 WO1991012845 A1 WO 1991012845A1 GB 9100235 W GB9100235 W GB 9100235W WO 9112845 A1 WO9112845 A1 WO 9112845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inner cannula
- outer tube
- cannula
- tube
- patient end
- Prior art date
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
- A61M16/04—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
- A61M16/0402—Special features for tracheal tubes not otherwise provided for
- A61M16/0427—Special features for tracheal tubes not otherwise provided for with removable and re-insertable liner tubes, e.g. for cleaning
Definitions
- This invention relates to tracheal tube assemblies of the kind having an outer tube an inner cannula that is insertable within and removable from the outer tube.
- Tracheal tube assemblies are described, for example, in US 3948274, GB 2056285B, GB 1099277, GB 125754, WO 90/04992, FR 2539998A, DE 72467, DE 1268313, EP 0107779A, US 4817598, US 3659612, US 4009720, US 3088466, US 4315545, US 2765792, US 3169529, US 3263684, US 3334631, US 3587589, US 3688774, US 3731692, US 3889688, US 3948273, US 3973569, US 3987798, US 4033353, US 4045058, US 4235229, US 4471776, US 4593690.
- the inner surface of tracheal tubes tends to accumulate a film of respiratory secretions and bacteria.
- This film can obstruct the bore of the tube and reduce gas flow along it. It has been found that the film can also act as a site for build up of bacteria in quantities sufficient to cause infection if dislodged from the tube and subsequently inhaled.
- the use of an inner cannula which is periodically removed and replaced, can reduce these effects but brings with it disadvantages. In particular, the thickness of the wall of the inner cannula will itself reduce the effective bore of the tube.
- the inner cannula is preferably made of material to which secretions will cling without becoming dislodged into the bronchii and that these materials, such as PVC, tend to have a relatively high coefficient of friction. These materials also tend to be relatively flexible, so that the cannula wall must be made thick enough to prevent kinking on insertion.
- a tracheal tube assembly of the above-specified kind characterised in that the inner cannula has at its patient end an external diameter that is greater than that of the major part of the inner cannula, that the external diameter at the patient end is at least equal to the internal diameter of the outer tube such that the inner cannula seals with the outer tube at its patient end, and that the external diameter of the major part of the inner cannula is less than the internal diameter of the outer tube so that the inner cannula is freely insertable along the outer tube.
- the patient end of the inner cannula is preferably deformable radially, before insertion in the outer tube the external diameter of the patient end of the inner cannula being greater than the internal diameter of the outer tube.
- the inner cannula is preferably flared outwardly at the patient end and may be of a plastic material.
- the inner cannula may have an inner surface to which respiratory secretions will cling and an outer surface of a different material with a lower coefficient of friction than the inner surface.
- the inner surface may be of PVC and the outer surface of polyolefine.
- the patient end of both the inner cannula and the outer tube may be bevelled.
- Figure 1 is a sectional side elevation of a part of the assembly
- Figure 2 is an enlarged side elevation section of a part of the assembly.
- Figure 3 is a transverse sectional view along the line III - III of Figure 2.
- the assembly comprises an outer endotracheal tube
- the outer tube 1 is of a constant radius curvature along its length and is made of PVC or a similar plastics material. At its forward, patient end, the tube 1 has a bevelled, open tip 10 which, in use, is located in the trachea of the patient. Close to the forward end, a cuff
- tube II embraces the tube which is inflatable via a lumen 12 extending along the wall of the tube which communicates with an inflation line 13 and connector 14.
- a flange 15 is connected to the rear, machine end of tube 1 where it emerges from the mouth of the patient.
- the inner cannula 2 is of the same length as the outer tube 1 and in preformed with the same curvature.
- the inner cannula 2 is a coextrusion of two different materials.
- the outer layer 20 is of a relatively low friction plastics- material such as a polyolefine, for example, a low density polyethylene or polypropylene.
- the inner layer 21 is of a material with a higher coefficient of friction but which enables respiratory secretions and bacteria to cling to it.
- the inner layer 21 may be of the same material as the outer tube 1, namely PVC.
- Various different factors determine the degree to which secretions will cling to the inner layer 21. For example, a highly polar material will improve adhesion as will the presence of microscopic surface formations. A hydrophilic material may also provide a better site for adhesion of the secretions.
- the outer layer 20 is more rigid that the inner layer 21 which is relatively flexible.
- the inner cannula 2 is of circular shape and of the same external diameter along the major part of its length, which is slightly less than the internal diameter of the outer tube.
- the clearance between the inner cannula and the outer tube is sufficient to enable the inner cannula to be freely inserted and removed without substantially reducing the internal diameter and hence the gas passage through the assembly. Insertion is further facilitated by the low friction outer surface of the cannula.
- the cannula 2 is flared outwardly to form a portion 22 which, in its natural state, before insertion in the outer tube 1, has an external diameter slightly greater than the internal diameter of the outer tube.
- the cannula 2 has a coupling 23, the forward end of which mates with the machine end of the outer tube 1.
- the rear end of the coupling is provided with a female luer tapered recess 24 that is adapted to receive a cooperating coupling (not shown) connected to a patient ventilator.
- the forward end of the inner cannula 2 is pushed into the machine end of the outer tube 1, the bevel at the forward end of the cannula serving to aid initial insertion into the tube.
- the deformable nature of the inner cannula allows its forward portion 22 to be deformed inwardly by contact with the inside of the tube. In this way, the portion 22 forms a sliding, wiping seal with the tube 1 as it is pushed along it.
- the friction produced by contact of the portion 22 with the tube 1 is relatively small because of the small area of contact, so that there is little impediment to insertion.
- the forward portion 22 of the inner cannula is a close, sealing fit with the bore of the tube 1 at its patient end.
- the inner cannula 2 is periodically removed, when accumulated secretions have built up, and replaced by a new cannula, without the need to remove the outer tube.
- the inner cannula 2 is removed at least once every twelve hours and preferably more frequently, such as every six hours. Conveniently, the cannula is replaced once every time there is a change in shift of nursing staff.
- inner cannulae have been replaced only when secretions have reached the stage of threatening to block passage through the assembly, such as, once a day, or every other day. The importance of more frequent replacement in reduced bacterial infection has not heretofore been appreciated.
- the outer layer 20 of the inner cannula 2 is of a more rigid material than the inner layer 21, it enables the cannula to be made with a thinner wall than would be possible if it were made entirely from the material of the inner layer, and without the risk of the cannula kinking on insertion. It will be appreciated that the inner cannula 2 need not be a coextrusion but that the inner or outer surface could be provided by treating or coating with a different material.
- the assembly could be a tracheostomy tube assembly instead of an endotracheal tube assembly.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69107376T DE69107376T2 (en) | 1990-02-21 | 1991-02-15 | COMPOSED TRACHEAL TUBE. |
EP91904016A EP0474802B1 (en) | 1990-02-21 | 1991-02-15 | Tracheal tube assemblies |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909003857A GB9003857D0 (en) | 1990-02-21 | 1990-02-21 | Medico-surgical tube assemblies |
GB9003857.1 | 1990-02-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991012845A1 true WO1991012845A1 (en) | 1991-09-05 |
Family
ID=10671343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1991/000235 WO1991012845A1 (en) | 1990-02-21 | 1991-02-15 | Tracheal tube assemblies |
Country Status (8)
Country | Link |
---|---|
US (1) | US5119811A (en) |
EP (1) | EP0474802B1 (en) |
JP (1) | JP2851944B2 (en) |
AU (1) | AU7326891A (en) |
CA (1) | CA2063583A1 (en) |
DE (1) | DE69107376T2 (en) |
GB (1) | GB9003857D0 (en) |
WO (1) | WO1991012845A1 (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5184611A (en) * | 1991-01-04 | 1993-02-09 | Smiths Industries Public Limited Company | Tracheal tube assemblies and liners |
US5287852A (en) * | 1993-01-13 | 1994-02-22 | Direct Trends International Ltd. | Apparatus and method for maintaining a tracheal stoma |
GB2323292A (en) * | 1997-03-18 | 1998-09-23 | Smiths Industries Plc | Laryngeal mask assembly |
US6698428B2 (en) | 1996-11-06 | 2004-03-02 | Archibald I. J. Brain | Endotracheal tube construction |
US6705318B1 (en) | 1999-04-09 | 2004-03-16 | Archibald I. J. Brain | Disposable LMA |
US6792948B2 (en) | 2003-01-22 | 2004-09-21 | Archibald I. J. Brain | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
US6918388B2 (en) | 1997-07-25 | 2005-07-19 | The Laryngeal Mask Company Limited | Intubating laryngeal mask |
US7004169B2 (en) | 1999-10-07 | 2006-02-28 | Indian Ocean Medical Inc. | Laryngeal mask with large-bore gastric drainage |
US7134431B2 (en) | 2003-09-08 | 2006-11-14 | Indian Ocean Medical Inc. | Laryngeal mask airway device with position controlling tab |
US7156100B1 (en) | 1998-10-06 | 2007-01-02 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
US9265904B2 (en) | 2009-07-06 | 2016-02-23 | Teleflex Life Sciences | Artificial airway |
US9498591B2 (en) | 2005-05-27 | 2016-11-22 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device with a support for preventing occlusion |
US9528897B2 (en) | 2009-08-13 | 2016-12-27 | Chimden Medical Pty Ltd | Pressure indicator |
US9675772B2 (en) | 2010-10-15 | 2017-06-13 | The Laryngeal Mask Company Limited | Artificial airway device |
US9694150B2 (en) | 1998-08-13 | 2017-07-04 | The Laryngeal Mask Company Limited | Laryngeal mask airway device |
US9974912B2 (en) | 2010-10-01 | 2018-05-22 | Teleflex Life Sciences Unlimited Company | Artificial airway device |
US10549054B2 (en) | 2011-02-02 | 2020-02-04 | Teleflex Life Sciences Unlimited Company | Artificial airway |
US10576229B2 (en) | 2009-03-03 | 2020-03-03 | The Laryngeal Mask Company Limited | Artificial airway device |
WO2020073141A1 (en) * | 2018-10-08 | 2020-04-16 | Maite Fernandez (1%) | Coaxial endotracheal tube |
US10806327B2 (en) | 2011-11-30 | 2020-10-20 | Teleflex Life Sciences Pte, Ltd. | Laryngeal mask for use with an endoscope |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991012844A1 (en) * | 1990-02-21 | 1991-09-05 | Smiths Industries Public Limited Company | Tracheal tube assemblies |
US7669600B2 (en) * | 1996-03-11 | 2010-03-02 | Orlando Morejon | Endotracheal tube cleaning apparatus |
US8557054B2 (en) * | 1996-03-11 | 2013-10-15 | Orlando Morejon | Endotracheal tube cleaning apparatus |
US5709691A (en) * | 1996-03-11 | 1998-01-20 | Morejon; Orlando | Endotracheal tube cleaning device |
FR2758089B1 (en) * | 1997-01-06 | 1999-03-05 | Georges Boussignac | METHOD AND DEVICE FOR EXCHANGING RESPIRATORY TUBE IN THE TRACHEA OF A PATIENT |
US6575158B1 (en) | 1997-06-03 | 2003-06-10 | The Board Of Regents Of The University Of Texas System | Endotracheal tube guide and related tracheostomy surgical procedure |
US5954636A (en) * | 1997-07-15 | 1999-09-21 | Schwartz; Roy E. | Pediatric endotracheal tube with bronchial blocker and method for selectively blocking respiratory airflow to a pediatric patient's lung |
US6135111A (en) * | 1998-08-31 | 2000-10-24 | Vital Signs Inc. | Tracheostomy tube with removable inner cannula |
US6629924B2 (en) * | 2000-12-15 | 2003-10-07 | Jayson D. Aydelotte | Enhanced endotracheal tube |
GB0304851D0 (en) * | 2003-03-04 | 2003-04-09 | Intersurgical Ltd | Improvements relating to respiratory aids |
DE102005021470A1 (en) * | 2005-05-10 | 2006-11-16 | Tracoe Medical Gmbh | Introducer for percutaneous tracheostomy |
DE102006029599A1 (en) * | 2006-06-26 | 2007-12-27 | Tracoe Medical Gmbh | Device for introducing a tracheostomy tube into a tracheostoma |
DE102007011930B3 (en) * | 2007-03-13 | 2008-02-07 | Willy Rüsch GmbH | Tracheal or tracheostomy tube arrangement for use in e.g. artificial respiration of patient, has supporting structure that supports flexible layer and is formed by hose-shaped netting having filaments and/or fibers made of plastic |
US8104475B2 (en) * | 2008-11-05 | 2012-01-31 | Smiths Group Plc | Medical tube assemblies |
USD699348S1 (en) | 2010-01-27 | 2014-02-11 | Orlando Morejon | Handle |
US20110186052A1 (en) * | 2010-02-01 | 2011-08-04 | Orlando Morejon | Cleaning assembly for an endotracheal tube |
US20110197894A1 (en) * | 2010-02-18 | 2011-08-18 | Orlando Morejon | Endotracheal tube cleaning apparatus |
JP2012170792A (en) * | 2011-02-24 | 2012-09-10 | Kawasumi Lab Inc | Tracheal cannula |
GB201303553D0 (en) | 2013-02-28 | 2013-04-10 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
GB201303554D0 (en) | 2013-02-28 | 2013-04-10 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
GB201405219D0 (en) * | 2014-03-22 | 2014-05-07 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
GB201407573D0 (en) | 2014-04-30 | 2014-06-11 | Smiths Medical Int Ltd | Tubes and their manuacture |
US10279137B1 (en) | 2014-06-27 | 2019-05-07 | Orlando Morejon | Connector assembly for a medical ventilator system |
US11395897B1 (en) | 2014-06-27 | 2022-07-26 | Orlando Morejon | Connector assembly for a medical ventilator system |
GB201510231D0 (en) | 2015-06-11 | 2015-07-29 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
GB201510230D0 (en) | 2015-06-11 | 2015-07-29 | Smiths Medical Int Ltd | Tracheostomy tube assemblie and inner cannulae |
GB201512674D0 (en) | 2015-07-15 | 2015-08-26 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
GB201515450D0 (en) | 2015-08-29 | 2015-10-14 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
DE102020105522A1 (en) | 2020-03-02 | 2021-09-02 | Tracoe Medical Gmbh | Tracheal ventilation device with optimized cuff tube |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2923299A (en) * | 1957-10-17 | 1960-02-02 | Robert C Blackwood | Tracheostomy tube device |
EP0037719A1 (en) * | 1980-04-07 | 1981-10-14 | Shiley Incorporated | Tracheostomy tube with disposable inner cannula |
Family Cites Families (11)
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US2765792A (en) * | 1953-04-17 | 1956-10-09 | Edgar B Nichols | Tracheal devices |
US2786469A (en) * | 1953-12-18 | 1957-03-26 | Cohen William | Tracheal tube assembly and tracheal plug |
US3088466A (en) * | 1960-05-04 | 1963-05-07 | Edgar B Nichols | Tracheal devices |
US3039469A (en) * | 1960-05-09 | 1962-06-19 | Josephine G Fountain | Direct suction tracheotomy tube |
US3169529A (en) * | 1963-05-27 | 1965-02-16 | Norman Z Koenig | Tracheostomy tube |
US3225767A (en) * | 1964-03-13 | 1965-12-28 | South Chester Corp | Tracheal tube device |
US3334631A (en) * | 1964-09-11 | 1967-08-08 | Dow Corning | Tracheal tube assembly |
US3443564A (en) * | 1965-06-22 | 1969-05-13 | Drager Otto H | Tracheal tube |
US3606669A (en) * | 1969-05-26 | 1971-09-21 | Philip Morris Inc | Method of making tracheal tube device |
US4827925A (en) * | 1986-10-20 | 1989-05-09 | Vilasi Joseph A | Cuffless adjustable endotracheal tube |
US5024220A (en) * | 1988-07-21 | 1991-06-18 | Board Of Regents, The University Of Texas System | Nasotracheal tube insertion connector |
-
1990
- 1990-02-21 GB GB909003857A patent/GB9003857D0/en active Pending
-
1991
- 1991-02-15 EP EP91904016A patent/EP0474802B1/en not_active Expired - Lifetime
- 1991-02-15 JP JP3504075A patent/JP2851944B2/en not_active Expired - Fee Related
- 1991-02-15 DE DE69107376T patent/DE69107376T2/en not_active Expired - Fee Related
- 1991-02-15 WO PCT/GB1991/000235 patent/WO1991012845A1/en active IP Right Grant
- 1991-02-15 AU AU73268/91A patent/AU7326891A/en not_active Abandoned
- 1991-02-15 CA CA002063583A patent/CA2063583A1/en not_active Abandoned
- 1991-02-19 US US07/656,434 patent/US5119811A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2923299A (en) * | 1957-10-17 | 1960-02-02 | Robert C Blackwood | Tracheostomy tube device |
EP0037719A1 (en) * | 1980-04-07 | 1981-10-14 | Shiley Incorporated | Tracheostomy tube with disposable inner cannula |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5184611A (en) * | 1991-01-04 | 1993-02-09 | Smiths Industries Public Limited Company | Tracheal tube assemblies and liners |
US5287852A (en) * | 1993-01-13 | 1994-02-22 | Direct Trends International Ltd. | Apparatus and method for maintaining a tracheal stoma |
US6698428B2 (en) | 1996-11-06 | 2004-03-02 | Archibald I. J. Brain | Endotracheal tube construction |
GB2323292A (en) * | 1997-03-18 | 1998-09-23 | Smiths Industries Plc | Laryngeal mask assembly |
GB2323292B (en) * | 1997-03-18 | 2001-02-14 | Smiths Industries Plc | Laryngeal mask assemblies |
US6918388B2 (en) | 1997-07-25 | 2005-07-19 | The Laryngeal Mask Company Limited | Intubating laryngeal mask |
US9694150B2 (en) | 1998-08-13 | 2017-07-04 | The Laryngeal Mask Company Limited | Laryngeal mask airway device |
US7156100B1 (en) | 1998-10-06 | 2007-01-02 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
US6705318B1 (en) | 1999-04-09 | 2004-03-16 | Archibald I. J. Brain | Disposable LMA |
US7004169B2 (en) | 1999-10-07 | 2006-02-28 | Indian Ocean Medical Inc. | Laryngeal mask with large-bore gastric drainage |
US6792948B2 (en) | 2003-01-22 | 2004-09-21 | Archibald I. J. Brain | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
US9027559B2 (en) | 2003-01-22 | 2015-05-12 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
US7134431B2 (en) | 2003-09-08 | 2006-11-14 | Indian Ocean Medical Inc. | Laryngeal mask airway device with position controlling tab |
US9498591B2 (en) | 2005-05-27 | 2016-11-22 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device with a support for preventing occlusion |
US9522245B2 (en) | 2005-05-27 | 2016-12-20 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device and method of manufacture |
US9662465B2 (en) | 2005-05-27 | 2017-05-30 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
US10576229B2 (en) | 2009-03-03 | 2020-03-03 | The Laryngeal Mask Company Limited | Artificial airway device |
US9265904B2 (en) | 2009-07-06 | 2016-02-23 | Teleflex Life Sciences | Artificial airway |
US10576230B2 (en) | 2009-07-06 | 2020-03-03 | Teleflex Life Sciences Unlimited Company | Artificial airway |
US9528897B2 (en) | 2009-08-13 | 2016-12-27 | Chimden Medical Pty Ltd | Pressure indicator |
US10126197B2 (en) | 2009-08-13 | 2018-11-13 | Teleflex Life Sciences | Pressure indicator |
US9974912B2 (en) | 2010-10-01 | 2018-05-22 | Teleflex Life Sciences Unlimited Company | Artificial airway device |
US9675772B2 (en) | 2010-10-15 | 2017-06-13 | The Laryngeal Mask Company Limited | Artificial airway device |
US10842962B2 (en) | 2010-10-15 | 2020-11-24 | Teleflex Life Sciences Pte. Ltd. | Artificial airway device |
US10549054B2 (en) | 2011-02-02 | 2020-02-04 | Teleflex Life Sciences Unlimited Company | Artificial airway |
US10806327B2 (en) | 2011-11-30 | 2020-10-20 | Teleflex Life Sciences Pte, Ltd. | Laryngeal mask for use with an endoscope |
WO2020073141A1 (en) * | 2018-10-08 | 2020-04-16 | Maite Fernandez (1%) | Coaxial endotracheal tube |
Also Published As
Publication number | Publication date |
---|---|
DE69107376T2 (en) | 1995-06-14 |
US5119811A (en) | 1992-06-09 |
JP2851944B2 (en) | 1999-01-27 |
AU7326891A (en) | 1991-09-18 |
DE69107376D1 (en) | 1995-03-23 |
GB9003857D0 (en) | 1990-04-18 |
EP0474802B1 (en) | 1995-02-15 |
EP0474802A1 (en) | 1992-03-18 |
JPH05504082A (en) | 1993-07-01 |
CA2063583A1 (en) | 1991-08-22 |
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