WO1990004430A1 - Ameliorations relatives a des catheters - Google Patents
Ameliorations relatives a des catheters Download PDFInfo
- Publication number
- WO1990004430A1 WO1990004430A1 PCT/GB1989/001288 GB8901288W WO9004430A1 WO 1990004430 A1 WO1990004430 A1 WO 1990004430A1 GB 8901288 W GB8901288 W GB 8901288W WO 9004430 A1 WO9004430 A1 WO 9004430A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- tube
- catheter
- gas
- coating
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/04—Macromolecular materials
- A61L29/041—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
- A61L29/08—Materials for coatings
- A61L29/085—Macromolecular materials
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1075—Balloon catheters with special features or adapted for special applications having a balloon composed of several layers, e.g. by coating or embedding
Definitions
- This invention relates to catheters that is, it relates to tubes which are inserted through channels of the body for example the throat, and serve to admit or remove gasses or liquids therefrom.
- One known form of catheter is provided near the end which is to be inserted with a sleeve, the ends of which are secured to the tube.
- the interior of this so-called ⁇ balloon" is connected to a source of air or liquid so that it can be inflated when the tube has been correctly positioned.
- the balloon then acts as a cushion to protect the internal tissues from traumatic damage and to hold the tube in place.
- This type of catheter is employed for, amongst other things, removal of urine from a body or as an artificial airway.
- the catheter is termed a “urinary catheter” whilst in the latter it is known as an “endotracheal tube” or a “tracheostomy tube” depending on whether it is inserted via the nasal passage or down the throat or via slit cut into the trachea.
- the balloon further serves to provide a gas seal and thereby facilitates respiration by the ventilator attached to the tube since all the induced gasses will reach the patient's lungs.
- a pressure balancing device which absorbs or delivers pressure by reference to an elastic reservoir of known characteristics may be employed. This adds to the amount and complexity of equipment required and consequently to the cost. Moreover, although this type of device is said to be self-regulating, it has been found to require monitoring for complete safety.
- a catheter in accordance with the invention comprises a length of tubing having a sleeve provided therearound adjacent the end which is to be inserted through a body channel, the ends of the sleeve being secured to the tube and the interior of the sleeve being connected to a source of gas or liquid whereby it may be inflated when the tube is correctly positioned in the body channel, wherein the nature of the material of the sleeve is such that, or is so treated that, passage of gas through at least part of the sleeve is prevented in at least one direction.
- the sleeve is coated with a gas impermeable material on at least part of its outer surface to prevent ingress of gasses.
- the half of the sleeve which is closest to the inserted end of the tube is coated on its outer surface. It is this region, where diffusion is most likely since it will normally be surrounded by gasses, in * articular anaesthetic gasses.
- the whole of the outer surface of the sleeve may be coated which will prevent any diffusion of gas which escapes towards the insertion end around the exterior of the sleeve.
- the inside of the tube in the region of the sleeve may also be coated with a gas impermeable material. This will substantially prevent diffusion of gasses passed down the tube into the sleeve.
- the sleeve can be coated on the inner surface with gas impermeable material. This will prevent any gas from inside the sleeve permeating through the sleeve and will also substantially reduce the amount of anaesthetic gas which can pass into the space between the sleeve and the tube.
- the sleeve may be coated inside and outside with gas impermeable material or it may be formed from a gas impermeable material, suitably polyvinyl acetal.
- the coating may also be liquid impermeable. This is particularly suitable when the inserted end of the catheter will be surrounded by liquid or when liquid is employed to inflate the balloon.
- the sleeve is formed by dip coating and then secured in place onto the tube.
- the impermeable coating(s) can therefore be ⁇ readily provided during the dip coating process.
- the impermeable coating(s) may be alternatively provided as a laminate or by a blow moulding or by spraying or by co-extrusion with the sleeve.
- the coating may comprise either polyvinylidene chloride or polyethylene terephthlate or polyvinyl alcohol.
- the tube has a loose-fitting cover over its mouth and means to remove the cover once the tube has been correctly inserted.
- the cover is conveniently arranged in its operative position to extend from the mouth of the tube over the sleeve. The cover serves to prevent ingress of saliva and mucus into the tube and protects the balloon during insertion.
- Figure 1 is a longitudinal section through a catheter in accordance with the invention.
- Figure 2 is a similar view to Figure 1 with the sleeve inflated.
- the catheter shown in the Figures is an endotracheal tube which comprises a length of flexible tubing 2 the inserted end 4 of which is cut obliquely to form a mouth and has rounded edges 6.
- a sleeve 8 is provided around the tube, the ends 7 of the sleeve 8 being secured to the tube 2.
- Gas or liquid is supplied to the space 9 between the sleeve 8 and the tube 2 to inflate the sleeve 8 (see Figure 2) from an external pump 10 via capillary tube 12 and an outlet 14 in the tube 2.
- a pressure measuring device (not shown) is provided in the pump or capillary tube which indicates the pressure achieved in the sleeve.
- the endotracheal tube is shown in Figure 1 ready for insertion.
- a loose fitting cover 16 formed from a soft flexible material covers the mouth 4 of the tube 2 and the sleeve 8.
- a tube 18, one end of which is securely attached to the inside of the cover 16 extends through tube 2, the other end 24 protruding from the insertion end 22 of the tube 2 a sufficient distance to allow it to be firmly gripped.
- the tube 2 is inserted into the nose or trachea and correctly positioned. Mucus or other matter which might otherwise block the mouth of the tube as it is inserted is retained on the outer surface of the cover 16.
- the sleeve 8 is inflated by pumping its pump 10 until the correct pressure is achieved as determined by the pressure measuring device.
- the cover 16 is then removed by pulling protruding end 24 of tube 18 which turns the cover 16 inside out so that any retained mucus or the like is inside the inverted cover and does not come into contact with the inner surface of the tube 2. Consequently a clear pathway to the patient's lungs is provided.
- the coating 26 prevents osmosis of the anaesthetizing gasses through the sleeve but still allows at least some passage of gas in the other direction which means that if, per chance, excess gas is inadvertently passed down capillary tube 12 while the tube 2 is in position this can escape.
- the sleeve could be coated on its inner surface 28 with a gas impermeable material. This would reduce the amount of anaesthetizing gasses which could pass into the space 9 from outside the sleeve and prevent passage of gas out of the space 9.
- the sleeve 8 can also be coated on both its inner and outer surfaces to prevent passage of gas in either direction.
- the interior of the tube 2 in the region of the sleeve 8 can also be provided with a gas impermeable coating 30. This prevents gasses being passed down the tube into the patient from passing into the space 9 and raising the pressure therein.
- Suitably coating materials include polyvinylidene chloride, polyethylene terephthlate or polyvinyl alcohol, all of which have good barrier properties.
- the sleeve is preferably formed by a dip coating process and the impermeable layer can be applied as part of the process.
- the barrier layer can be applied as a laminate, by a blow moulding process, by spraying or by co-extrusion with the sleeve.
- the sleeve may in another embodiment be formed from an impermeable material in which case no coating process is enquired. However the material used must not be too hard or damage to the patient could still occur.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Pulmonology (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials For Medical Uses (AREA)
Abstract
L'invention concerne un tube de cathéter autour duquel est disposé un manchon à proximité de l'extrémité insérée dans un canal corporel, les extrémités dudit manchon étant fixées au tube et ledit manchon étant gonflable. Le manchon est soit formé d'une matière imperméable au gaz soit au moins partiellement recouvert d'une matière empêchant le passage de gaz dans et/ou hors de l'espace compris entre le manchon et le tube. On peut par conséquent empêcher une élévation de la pression exercée sur le canal corporel par le manchon ayant pour effet une détérioration des tissus, ou une chute de pression provoquant un danger de glissement ou de perte de gaz, si l'on utilise le cathéter afin d'amener du gaz à un patient.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8825236.6 | 1988-10-28 | ||
GB888825236A GB8825236D0 (en) | 1988-10-28 | 1988-10-28 | Improvements in & relating to endotracheal tube |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990004430A1 true WO1990004430A1 (fr) | 1990-05-03 |
Family
ID=10645923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1989/001288 WO1990004430A1 (fr) | 1988-10-28 | 1989-10-27 | Ameliorations relatives a des catheters |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0440718A1 (fr) |
JP (1) | JPH04503164A (fr) |
AU (1) | AU4494289A (fr) |
GB (1) | GB8825236D0 (fr) |
WO (1) | WO1990004430A1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2043734A2 (fr) * | 2006-07-14 | 2009-04-08 | Nelson Medical Devices, LLC | Cathéter autonettoyant et ses procédés d'utilisation correspondants |
WO2011127478A1 (fr) * | 2010-04-09 | 2011-10-13 | Nanovasc, Inc. | Manchon pour greffon et procédé associé |
EP0953364B2 (fr) † | 1991-04-26 | 2012-02-08 | Boston Scientific Corporation | Ballonnets médicaux produit par co-extrusion et cathéter comportant un tel ballonnet |
US20130079871A1 (en) * | 2010-06-08 | 2013-03-28 | Regents Of The University Of Minnesota | Vascular elastance |
US9242082B2 (en) | 2014-06-19 | 2016-01-26 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US9333328B2 (en) | 2010-11-22 | 2016-05-10 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US11141581B2 (en) | 2019-09-06 | 2021-10-12 | Aria Cv, Inc. | Diffusion and infusion resistant implantable devices for reducing pulsatile pressure |
US11331105B2 (en) | 2016-10-19 | 2022-05-17 | Aria Cv, Inc. | Diffusion resistant implantable devices for reducing pulsatile pressure |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4557959A (en) * | 1982-02-11 | 1985-12-10 | Rehau Plastiks Ag & Co. | Multilayer medical working means |
EP0214721A1 (fr) * | 1985-07-05 | 1987-03-18 | Franklin Medical Limited | Cathéters à ballonnet |
EP0235482A1 (fr) * | 1985-12-28 | 1987-09-09 | TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION | Matériau médical antithrombogénique et cathétère intravasculaire fabriqué à partir de ce matériau |
-
1988
- 1988-10-28 GB GB888825236A patent/GB8825236D0/en active Pending
-
1989
- 1989-10-27 JP JP51139489A patent/JPH04503164A/ja active Pending
- 1989-10-27 EP EP19890912271 patent/EP0440718A1/fr not_active Withdrawn
- 1989-10-27 AU AU44942/89A patent/AU4494289A/en not_active Abandoned
- 1989-10-27 WO PCT/GB1989/001288 patent/WO1990004430A1/fr not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4557959A (en) * | 1982-02-11 | 1985-12-10 | Rehau Plastiks Ag & Co. | Multilayer medical working means |
EP0214721A1 (fr) * | 1985-07-05 | 1987-03-18 | Franklin Medical Limited | Cathéters à ballonnet |
EP0235482A1 (fr) * | 1985-12-28 | 1987-09-09 | TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION | Matériau médical antithrombogénique et cathétère intravasculaire fabriqué à partir de ce matériau |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0953364B2 (fr) † | 1991-04-26 | 2012-02-08 | Boston Scientific Corporation | Ballonnets médicaux produit par co-extrusion et cathéter comportant un tel ballonnet |
EP2043734A4 (fr) * | 2006-07-14 | 2009-09-02 | Nelson Medical Devices Llc | Cathéter autonettoyant et ses procédés d'utilisation correspondants |
US8734399B2 (en) | 2006-07-14 | 2014-05-27 | Nelson Medical Devices, Llc | Self cleaning catheter and methods of use thereof |
EP2043734A2 (fr) * | 2006-07-14 | 2009-04-08 | Nelson Medical Devices, LLC | Cathéter autonettoyant et ses procédés d'utilisation correspondants |
WO2011127478A1 (fr) * | 2010-04-09 | 2011-10-13 | Nanovasc, Inc. | Manchon pour greffon et procédé associé |
US9987153B2 (en) * | 2010-06-08 | 2018-06-05 | The Regents Of The University Of Minnesota | Vascular elastance |
US20130079871A1 (en) * | 2010-06-08 | 2013-03-28 | Regents Of The University Of Minnesota | Vascular elastance |
US11583420B2 (en) | 2010-06-08 | 2023-02-21 | Regents Of The University Of Minnesota | Vascular elastance |
US10617538B2 (en) | 2010-06-08 | 2020-04-14 | Regents Of The University Of Minnesota | Vascular elastance |
US11406803B2 (en) | 2010-11-22 | 2022-08-09 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US10751519B2 (en) | 2010-11-22 | 2020-08-25 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US10350397B2 (en) | 2010-11-22 | 2019-07-16 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US11938291B2 (en) | 2010-11-22 | 2024-03-26 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US9333328B2 (en) | 2010-11-22 | 2016-05-10 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US10702682B2 (en) | 2010-11-22 | 2020-07-07 | Aria Cv, Inc. | System and method for reducing pulsatile pressure |
US11511089B2 (en) | 2014-06-19 | 2022-11-29 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US10682448B2 (en) | 2014-06-19 | 2020-06-16 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US9801989B2 (en) | 2014-06-19 | 2017-10-31 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US9242082B2 (en) | 2014-06-19 | 2016-01-26 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US9610391B2 (en) | 2014-06-19 | 2017-04-04 | Aria Cv, Inc. | Systems comprising an implantable component for treating pulmonary hypertension |
US11992636B2 (en) | 2014-06-19 | 2024-05-28 | Aria Cv, Inc. | Systems and methods for treating pulmonary hypertension |
US11331105B2 (en) | 2016-10-19 | 2022-05-17 | Aria Cv, Inc. | Diffusion resistant implantable devices for reducing pulsatile pressure |
US11141581B2 (en) | 2019-09-06 | 2021-10-12 | Aria Cv, Inc. | Diffusion and infusion resistant implantable devices for reducing pulsatile pressure |
US11833343B2 (en) | 2019-09-06 | 2023-12-05 | Aria Cv, Inc. | Diffusion and infusion resistant implantable devices for reducing pulsatile pressure |
Also Published As
Publication number | Publication date |
---|---|
JPH04503164A (ja) | 1992-06-11 |
GB8825236D0 (en) | 1988-11-30 |
AU4494289A (en) | 1990-05-14 |
EP0440718A1 (fr) | 1991-08-14 |
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