WO2014132016A1 - Ensembles tube de trachéotomie à canule interne - Google Patents
Ensembles tube de trachéotomie à canule interne Download PDFInfo
- Publication number
- WO2014132016A1 WO2014132016A1 PCT/GB2014/000043 GB2014000043W WO2014132016A1 WO 2014132016 A1 WO2014132016 A1 WO 2014132016A1 GB 2014000043 W GB2014000043 W GB 2014000043W WO 2014132016 A1 WO2014132016 A1 WO 2014132016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inner cannula
- cannula
- tracheostomy tube
- bore
- along
- 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
- 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
-
- 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
- A61M16/0465—Tracheostomy tubes; Devices for performing a tracheostomy; Accessories therefor, e.g. masks, filters
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/60—General characteristics of the apparatus with identification means
- A61M2205/6045—General characteristics of the apparatus with identification means having complementary physical shapes for indexing or registration purposes
Definitions
- This invention relates to inner cannulae of the kind for replaceable insertion in a tracheostomy tube, the inner cannula having a bore extending along its length.
- tracheostomy tube assemblies commonly include an outer tube and an inner tube or cannula that is a removable fit within the outer tube.
- the inner cannula can be removed and replaced periodically to ensure that the passage through the assembly does not become blocked by secretions. This avoids the need to remove the outer tube frequently.
- the inner cannula presents various problems because it must be thin walled and a close fit within the outer tube so as to provide a large bore and thereby limit the resistance to flow of gas along the assembly. It must, however, also be sufficiently stiff to be inserted in the outer tube without buckling or kinking.
- WO94/01 156 and WO2004/101048 describe inner cannulae made of PTFE.
- EP1938857 describes an arrangement of tracheostomy tubes and inner cannulae where the hubs of the inner cannulae of different sizes are shaped differently so that they will only fit in the appropriate tracheostomy tube.
- EP2224985 describes an arrangement for attaching a hub to the shaft of an inner cannula.
- GB2056285 describes an inner cannula having a wall corrugated both externally and internally and a longitudinal groove or other reinforcement member traversing at least some of the corrugations.
- US4817598 describes a smooth-walled inner cannula having a ring-pull formation at its rear, machine end.
- US51 19811 describes an inner cannula with a flared patient end and formed of two layers of different materials.
- US5386826 describes an inner cannula with an outer helical filament or layer of low friction material.
- US5983895 describes an inner cannula with straight sections at opposite ends joined by an intermediate curved section.
- US6019753 describes an inner cannula with two elongate regions of different flexibility so that the cannula has a plane of preferential bending.
- US6019753 describes an inner cannula having a shaft formed with slots to make it more flexible, the slots being covered by an outer thin sheath.
- US61351 10 describes a curved inner cannula that is retained with the outer tube by means of a rotatable spring fitting. It is an object of the present invention to provide an alternative tracheostomy tube assembly or inner cannula for such an assembly.
- an inner cannula of the above-specified kind characterised in that the bore is offset from the centre of the inner cannula along a major part of the length of the cannula and is located when bent during use towards the inside of the curve of the cannula.
- the inner cannula preferably has a smooth internal and external surface.
- the inner cannula may be preformed with a bent shape.
- the inner cannula is preferably moulded with an integral hub at its machine end.
- the bore and external surface of the inner cannula are both preferably circular in section.
- a tracheostomy assembly including an outer tracheostomy tube and an inner cannula according to the above one aspect of the present invention inserted within the outer tube and being removable therefrom.
- a tracheostomy tube assembly including an outer tracheostomy tube that is bent along its length and an inner cannula extending along the inside of the outer tube, characterised in that the inner cannula has a bore along its length that is offset from the centre towards the inside of the bend.
- Figure 1 is a side elevation view of a tracheostomy tube assembly including an inner cannula;
- Figure 2 is a perspective view of the inner cannula; and Figure 3 is a cross-sectional view through the inner cannula along the line III-III of
- the tracheostomy assembly comprises an outer tracheostomy tube 1 and a removable inner cannula 20 inserted within the outer tube.
- the outer tube 1 has a shaft 10 with a straight forward section 1 1, a straight rear section 12 and a curved intermediate section 13 linking the forward and rear sections.
- An inflatable sealing cuff 14 embraces the forward section 11 close to the patient end 15 of the tube, the cuff being inflated via an inflation lumen 16 and a combined connector and inflation indicator 17.
- the outer tube 1 has a hub 18 and flange 19 to which a retaining tape can be fastened for securing the tube with the patient's neck.
- the inside of the hub 18 is formed with keying flats (not shown), of the kind described in EP1938857, adapted to prevent full insertion of an inner cannula of the wrong size.
- the outer tube 1 could have an internal diameter between about 6mm and 10mm, and its length could be between 60mm and 200mm.
- the inner cannula 20 is moulded from a plastics material such as by blow moulding or injection moulding.
- the main part of the cannula 20 is provided by a shaft 21 that is moulded, preformed with a curved or angled shape corresponding to the shape of the outer tube 1 within which it is to be used. In this case it comprises a straight forward section 22, a straight rear section 23 and a curved intermediate section 24.
- the shaft 21 has a smooth outer surface 25 of circular section and a smooth bore 26 also of circular section, which extends along the length of the cannula.
- the bore 26 does not extend concentrically within the inner cannula 20 but, along most of its length, is displaced to one side of the centre of the shaft 21 , towards the inside of its curve so that the thickness of the wall 27A along the inside of the curve is less than that of the wall 27B along the outside of the curve.
- the wall thickness of the shaft 21 is preferably about 0.25mm in the side regions 27C, which is thinner than conventional inner cannula shafts which are typically between about 0.5mm and 1mm.
- the thickness of the wall in the thickened region 27B is greater than this whereas the thickness in the thinner region 27A is less than this.
- the inner cannula 20 is moulded with an integral hub portion 30 as one piece with the shaft 21.
- the hub portion 30 has a smooth external surface, the portion 31 at its forward end being shaped to fit into a 15mm connector.
- the hub 30 has a keying portion 32 provided with flats 33 of the kind described in EP1938857 adapted to fit with corresponding formations in the hub 18 of the outer tube 1.
- the bore 26 aligns concentrically, centrally within the hub portion 30.
- the rear end of the hub 30 has a ring-pull formation 34 of the kind described in US4817598, which facilitates removal of the inner cannula 20 from the outer tube 1 after use.
- the flexibility of the inner cannula 20 is such that it can readily bend to follow the shape of the different sections 12, 13 and 1 1 during insertion into the outer tube 1 without buckling or kinking.
- the thickened wall 27B along the outside curve helps the cannula 20 maintain its curved shape, preventing it from kinking or buckling and ensuring that the bore 26 maintains its maximum cross sectional area.
- the thinner wall 27A on the inside of the curve allows the cannula 20 to flex sufficiently during insertion so that it can be inserted within the outer tube 1 without the need for excessive insertion pressure.
- the smooth inner surface of the shaft 21 allows for smooth, non-turbulent flow of gas along the assembly. It also allows devices, such as endoscopes, probes, suction catheters or the like to be inserted freely along the cannula without the risk of catching, as might be the case with a cannula having a corrugated inner surface.
- the inner cannula 20 is described as being an integral, one-piece moulding with the hub portion 30, it could, instead, be formed of separate components.
- the shaft could be extruded and the hub portion subsequently attached with the shaft by overmoulding.
- the inner cannula need not be preformed to a bent shape but could be moulded straight, the off-centre bore giving the cannula a preferential plane of bending in which the thinner part of the wall lies on the inside of the curvature.
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
La présente invention concerne un ensemble tube de trachéotomie qui comprend un tube trachéal externe (1) coudé sur sa longueur et une canule interne amovible (20). La canule interne (20) présente un trou lisse (26) et une surface externe (25), tous deux de section circulaire. Le trou (26) est décalé par rapport au centre de la canule interne (20) vers l'intérieur du coude du tube externe (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB1303553.0A GB201303553D0 (en) | 2013-02-28 | 2013-02-28 | Tracheostomy tube assemblies and inner cannulae |
GB1303553.0 | 2013-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014132016A1 true WO2014132016A1 (fr) | 2014-09-04 |
Family
ID=48092246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2014/000043 WO2014132016A1 (fr) | 2013-02-28 | 2014-02-05 | Ensembles tube de trachéotomie à canule interne |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB201303553D0 (fr) |
WO (1) | WO2014132016A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016149518A1 (fr) * | 2015-03-19 | 2016-09-22 | Hansa Medical Products, Inc. | Tube endotrachéal comprenant des canules interne et externe et méthode d'utilisation |
WO2016174378A1 (fr) * | 2015-04-29 | 2016-11-03 | Smiths Medical International Limited | Ensembles tubes médico-chirurgicaux |
WO2016198817A1 (fr) | 2015-06-11 | 2016-12-15 | Smiths Medical International Limited | Ensembles de tubes de trachéotomie et canules internes |
WO2016198818A1 (fr) | 2015-06-11 | 2016-12-15 | Smiths Medical International Limited | Ensembles de tubes de trachéotomie et canules internes |
WO2017037404A1 (fr) | 2015-08-29 | 2017-03-09 | Smiths Medical International Limited | Canules internes et ensemble tube pour trachéostomie |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2056285A (en) | 1979-08-16 | 1981-03-18 | Smiths Industries Ltd | Tracheal tube assembly |
US4817598A (en) | 1987-06-08 | 1989-04-04 | Portex, Inc. | Tracheostomy tube with ring pull removable inner cannula |
US5119811A (en) | 1990-02-21 | 1992-06-09 | Smiths Industries Public Limited Company | Tracheal assembly having inner and outer tubes and surface materials |
WO1994001156A1 (fr) | 1992-07-01 | 1994-01-20 | Mallinckrodt Medical, Inc. | Canule interne pour tube de tracheotomie |
US5386826A (en) | 1990-02-21 | 1995-02-07 | Smiths Industries Public Limited Company | Tracheal tube assemblies |
EP0861673A2 (fr) * | 1996-11-08 | 1998-09-02 | Smiths Industries Public Limited Company | Assemblage de cathéthers et canules intérieurs |
US5983895A (en) | 1995-10-12 | 1999-11-16 | Smiths Industries Plc | Tracheostomy tubes and assemblies |
US6019753A (en) | 1997-12-02 | 2000-02-01 | Smiths Industries Public Limited Company | Catheter assemblies and inner cannulae |
US6135110A (en) | 1998-04-22 | 2000-10-24 | Sims Portex Inc. | Tracheostomy tube |
US6248099B1 (en) * | 1998-05-14 | 2001-06-19 | Medcare Medical Group, Inc. | Disposable tracheostomy inner cannula connector |
US20030136413A1 (en) * | 2002-01-23 | 2003-07-24 | Brain Archibald I. J. | Endotracheal tube which permits accurate determination of mucosal pressure |
WO2004101048A2 (fr) | 2003-05-06 | 2004-11-25 | Mallinckrodt Inc | Systemes de canules multiples ameliores et procedes correspondants |
WO2005016428A1 (fr) * | 2003-08-18 | 2005-02-24 | Metran Co., Ltd. | Tube de tracheotomie |
EP1938857A2 (fr) | 2006-12-21 | 2008-07-02 | Smiths Group plc | Assemblages de tube médical |
EP2224985A1 (fr) | 2008-01-04 | 2010-09-08 | Smiths Group PLC | Tubes et leur fabrication |
-
2013
- 2013-02-28 GB GBGB1303553.0A patent/GB201303553D0/en not_active Ceased
-
2014
- 2014-02-05 WO PCT/GB2014/000043 patent/WO2014132016A1/fr active Application Filing
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2056285A (en) | 1979-08-16 | 1981-03-18 | Smiths Industries Ltd | Tracheal tube assembly |
US4817598A (en) | 1987-06-08 | 1989-04-04 | Portex, Inc. | Tracheostomy tube with ring pull removable inner cannula |
US5119811A (en) | 1990-02-21 | 1992-06-09 | Smiths Industries Public Limited Company | Tracheal assembly having inner and outer tubes and surface materials |
US5386826A (en) | 1990-02-21 | 1995-02-07 | Smiths Industries Public Limited Company | Tracheal tube assemblies |
WO1994001156A1 (fr) | 1992-07-01 | 1994-01-20 | Mallinckrodt Medical, Inc. | Canule interne pour tube de tracheotomie |
US5983895A (en) | 1995-10-12 | 1999-11-16 | Smiths Industries Plc | Tracheostomy tubes and assemblies |
EP0861673A2 (fr) * | 1996-11-08 | 1998-09-02 | Smiths Industries Public Limited Company | Assemblage de cathéthers et canules intérieurs |
US6019753A (en) | 1997-12-02 | 2000-02-01 | Smiths Industries Public Limited Company | Catheter assemblies and inner cannulae |
US6135110A (en) | 1998-04-22 | 2000-10-24 | Sims Portex Inc. | Tracheostomy tube |
US6248099B1 (en) * | 1998-05-14 | 2001-06-19 | Medcare Medical Group, Inc. | Disposable tracheostomy inner cannula connector |
US20030136413A1 (en) * | 2002-01-23 | 2003-07-24 | Brain Archibald I. J. | Endotracheal tube which permits accurate determination of mucosal pressure |
WO2004101048A2 (fr) | 2003-05-06 | 2004-11-25 | Mallinckrodt Inc | Systemes de canules multiples ameliores et procedes correspondants |
WO2005016428A1 (fr) * | 2003-08-18 | 2005-02-24 | Metran Co., Ltd. | Tube de tracheotomie |
EP1938857A2 (fr) | 2006-12-21 | 2008-07-02 | Smiths Group plc | Assemblages de tube médical |
EP2224985A1 (fr) | 2008-01-04 | 2010-09-08 | Smiths Group PLC | Tubes et leur fabrication |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016149518A1 (fr) * | 2015-03-19 | 2016-09-22 | Hansa Medical Products, Inc. | Tube endotrachéal comprenant des canules interne et externe et méthode d'utilisation |
WO2016174378A1 (fr) * | 2015-04-29 | 2016-11-03 | Smiths Medical International Limited | Ensembles tubes médico-chirurgicaux |
WO2016198817A1 (fr) | 2015-06-11 | 2016-12-15 | Smiths Medical International Limited | Ensembles de tubes de trachéotomie et canules internes |
WO2016198818A1 (fr) | 2015-06-11 | 2016-12-15 | Smiths Medical International Limited | Ensembles de tubes de trachéotomie et canules internes |
WO2017037404A1 (fr) | 2015-08-29 | 2017-03-09 | Smiths Medical International Limited | Canules internes et ensemble tube pour trachéostomie |
Also Published As
Publication number | Publication date |
---|---|
GB201303553D0 (en) | 2013-04-10 |
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