GB2209121A - Balloon catheter inflation - Google Patents
Balloon catheter inflation Download PDFInfo
- Publication number
- GB2209121A GB2209121A GB8720049A GB8720049A GB2209121A GB 2209121 A GB2209121 A GB 2209121A GB 8720049 A GB8720049 A GB 8720049A GB 8720049 A GB8720049 A GB 8720049A GB 2209121 A GB2209121 A GB 2209121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catheter
- inflatable portion
- balloon
- inflatable
- sleeve
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1018—Balloon inflating or inflation-control devices
- A61M25/10184—Means for controlling or monitoring inflation or deflation
-
- 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
- A61M25/1018—Balloon inflating or inflation-control devices
- A61M25/10184—Means for controlling or monitoring inflation or deflation
- A61M25/10185—Valves
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Child & Adolescent Psychology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A catheter for clinical use comprises a length of inflatable tubing which, towards the end to be inserted, is provided with an inflatable outer sleeve or balloon. Air or liquid may be fed to the balloon for inflation through a catheter tube or bore which runs along at least part of the length of the catheter tube wall. The catheter has an inflatable portion of tubing 14 which is normally pre-inflated and which is connected to the inflatable balloon, sealing means 18, 20 being provided for both ends of the inflatable portion, the inflatable portion being covered with a sleeve 16 of elastic material. In use and after insertion of the catheter a sealing means 18 is removed and the modulus of elasticity of the elastic sleeve causes the inflated sleeve to return to its original shape causing air or liquid previously in the inflatable portion to inflate the balloon at the inserted end of the catheter. <IMAGE>
Description
CATHETER
The invention relates to a catheter for clinical use, for insertion into the bladder or other body orifices or blood vessels.
A standard catheter comprises a length of flexible tubing which, towards the end to be inserted, is provided with an inflatable outer sleeve or balloon. The catheter is inserted into, for example the bladder,while the balloon is deflated. Once inserted the balloon is inflated with air or liquid, thus anchoring the catheter in the correct position without damaging any internal tissues.
Air or liquid may be fed to the balloon through a capillary tube or bore which runs along, at least part of, the length of the catheter tube wall and which has one open end within the inflatable balloon and the other open end at the air or liquid supply point. Such a catheter will hereafter be referred to as a catheter of the type described.
In one particular type of known catheter for use in the bladder, the air or liquid supply point comprises an inflatable portion on catheter tubing which is pre-inflated during manufacture with air or liquid and sealed at both ends to form an external balloon. With this external balloon in the inflated state the catheter is inserted into the appropriate position in the bladder.
The seal at the end of the balloon nearest the inserted end of the catheter is usually in the form of a fluid retaining clip which can be easily removed. After insertion, removal of the clip results in spontaneous transfer of the fluid in the external balloon through the capillary tube to inflate the internal balloon. A disadvantage of this type of pre-inflated catheter is that the most suitable manufacturing materials for internal use have a poor elastic memory. Thus although it is intended that the transfer of fluid from the external to the internal balloon will be spontaneous, in practice, this is not always the case because the external balloon has become deformed and does not automatically return to its original shape. A certain amount of manual pumping is required to force the fluid to the internal balloon.
Further, having pumped the external balloon there is still a tendancy for the 'back-flow' of fluid because it takes a considerable time for the external balloon to fully contract to its original un-inflated state.
A catheter in accordance with the invention, is of the type described having an inflatable portion of tubing, forming part of or attached to the catheter tubing, sealing means being provided for both ends of the inflatable portion, the inflatable portion being covered with a sleeve of highly elastic material.
The inflatable portion of catheter tubing may be within a branch of the main catheter tube and of smaller diameter.
Preferably, one or both ends of the inflatable portion is reversibly sealed by a fluid retaining clip which closes the lumen of the catheter tube. The end of the inflatable portion through which it is inflated during manufacture may be reversibly sealed by a self-sealing rubber plug or a stopper incorporating a non-return valve.
The elastic sleeve is preferably a material which is resilient enough to return to its original shape when the inflatable portion is deflated, for example rubber. The elastic sleeve may be coated with a layer of an impermeable material or alternatively this layer may be applied to the inflatable portion of the catheter tubing before fitting of the sleeve. The thickness of the elastic sleeve is, for example lmm. The wall of the inflatable portion of tubing may be at least 2mm thick.
In manufacture, the section of catheter tubing which will become the pre-inflated external balloon, is first fitted with a self-sealing plug or non-return valve. The elastic sleeve is then applied and a fluid retaining clip fitted to occlude the tubing at the opposite end to the non-return valve or plug. Fluid is injected into the portion via the valve or plug so that it inflates to form the external balloon. The catheters are then sterilised and packaged for use.
In use the catheter is inserted into the bladder or other body vessel and the fluid retaining clip removed.
The modulus of elasticity of the sleeve is such that it immediately returns to its original shape and air or liquid if forced out of the external balloon, through the capillary tube and into the internal balloon. Such a catheter is thus spontaneously self-inflating so that manual pumping is unnecessary and the back-flow of fluid is avoided.
To remove the catheter from the bladder a syringe may be used to pierce the self-sealing plug or non-return valve and allow the fluid from the internal balloon to be withdrawn.
An advantage of a catheter in accordance with the invention is that whereas the degree of'elastic memory' achievable with standard catheter tubing is limited because it must be of a non-toxic formulation, the sleeve may be made of any highly elastic material since it is always external to the body. A further advantage is that conventional catheters of the type described herein may be easily converted to catheters in accordance with the invention by fitting of the elastic sleeve at the last stage of the production cycle.
It is to be understood that apart from urological catheters the invention is applicable to endo-tracheal catheters or balloon dilatation catheters for use, for example, in embolectomy.
The invention will now be described by way of example with reference to the accompanying drawings in which :
Figure 1 is a perspective view of a catheter in accordance with the invention.
Figure 2 is a cross-section of the self-inflating mechanism when the inflatable portion of the tube is deflated, and
Figure 3 is a cross-section of the self-inflating mechanism with the portion of the feed tube inflated to form the external balloon.
Referring to Figure 1 the catheter comprises a main catheter tube 2 and a catheter feed tube 4, the feed tube having a smaller diameter than the main tube.
Towards the domed end 6 of the tube to be inserted into the bladder, there is provided an outer inflatable sleeve or balloon 8. Beyond the sleeve 8 are catheter outlet holes 26. Air or liquid is fed to the balloon 8 through a capilliary tube 10 and holes 12 in the wall of the main catheter tube 2.
The catheter feed tube 4 is provided with an inflatable portion 14 which is covered with an elastic sleeve 16. At the end of the inflatable portion 14, adjacent the inlet of the feed tube 4 to the main catheter tube 2, a removable fluid retaining clip 18 is provided to close the lumen of the feed tube 4. The distal end of the inflatable portion is provided with a stopper 20 incorporating a non-return valve 24 (see figure 2).
Referring now to Figures 2 and 3, during manufacture air or liquid is introduced into the inflatable portion 14 through the non-return valve 24 in the stopper 20. The valve 24 prevents the air or liquid from subsequently escaping. The inflatable portion is then as shown in
Figure 3 in the form of a balloon where the outward pressure of the fluid on the walls of the tubing 14 is balanced by the inward force of the elastic sleeve 16.
The catheter is inserted into the baldder and the clip 18 removed. Contraction of the elastic sleeve 16 forces air or liquid from the external balloon through the capilliary tube 10 and into the balloon 4.When it is required to remove the catheter from the bladder, the non-return valve 24 is pierced with a syringe and the fluid from the internal balloon 4 may be withdrawn.
Thus the invention provides a catheter which, on the simple removal of a clip, becomes self-inflating.
Apart from the manufacturing advantages mentioned herein, the inflation mechanism requires no manual pumping so that the time taken for catheter insertion and positioning is reduced and the procedure is generally simplified.
Claims (8)
1. A catheter of the type described having an inflatable
portion of tubing forming part of, or attached to, the
catheter tubing, sealing means being provided for both
ends of the inflatable portion, the inflatable portion
being covered with a sleeve of elastic matErial.
2. A catheter as claimed in Claim 1 wherein the
inflatable portion forms part of a branch extending from
and connecting to the main catheter tube but being of
smaller diameter.
3. A catheter as claimed in either Claim 1 or 2 in which
one or both ends of the inflatable portion is reversibly
sealed by a fluid retaining clip which closes the lumen
of the catheter tube.
4. A catheter as claimed in Claim 3 in which the end of
the inflatable portion through which said portion may be
inflated during manufacture is reversibly sealed by a
safety sealing rubber plug or a stopper incorporating a
non-return valve.
5. A catheter as claimed in any of the preceding claims
in which the elastic sleeve is made of a material which is sufficiently resilient to return to its appro#ciriate original shape when the inflatable portion is deflated.
6. A catheter as claimed in Claim 5 wherein the elastic sleeve is made of rubber.
7. A catheter as claimed in either Claim 5 or 6 in which either the elastic sleeve or the inflatable portion of the catheter tube is coated with a layer of impermeable material.
8. A catheter substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8720049A GB2209121B (en) | 1987-08-25 | 1987-08-25 | Catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8720049A GB2209121B (en) | 1987-08-25 | 1987-08-25 | Catheter |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8720049D0 GB8720049D0 (en) | 1987-09-30 |
| GB2209121A true GB2209121A (en) | 1989-05-04 |
| GB2209121B GB2209121B (en) | 1991-02-13 |
Family
ID=10622787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8720049A Expired - Fee Related GB2209121B (en) | 1987-08-25 | 1987-08-25 | Catheter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2209121B (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992019316A1 (en) * | 1991-04-26 | 1992-11-12 | Boston Scientific Corporation | Co-extruded medical balloons and catheter using such balloons |
| US5538510A (en) * | 1994-01-31 | 1996-07-23 | Cordis Corporation | Catheter having coextruded tubing |
| US5545133A (en) * | 1994-09-16 | 1996-08-13 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5647847A (en) * | 1994-09-16 | 1997-07-15 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5695468A (en) * | 1994-09-16 | 1997-12-09 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5843032A (en) * | 1993-10-27 | 1998-12-01 | Schneider (Europe) Ag | Catheter with multilayer tube |
| US6190354B1 (en) | 1994-09-16 | 2001-02-20 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| GB2365342A (en) * | 2000-08-02 | 2002-02-20 | Christopher Leonard Watts | Self-inflating medical apparatus |
| US6786887B2 (en) | 2001-01-26 | 2004-09-07 | Scimed Life Systems, Inc. | Intravascular occlusion balloon catheter |
| GB2371754B (en) * | 2001-02-02 | 2005-09-21 | Biocompatibles Ltd | Balloon catheter inflation |
| US7781038B2 (en) | 1993-10-01 | 2010-08-24 | Boston Scientific Scimed, Inc. | Medical device balloons containing thermoplastic elastomers |
| US7815625B2 (en) | 1998-10-23 | 2010-10-19 | Boston Scientific Scimed, Inc. | Catheter having improved bonding region |
| US7942849B2 (en) | 1993-10-27 | 2011-05-17 | Schneider Gmbh | Catheter with multilayer tube |
| US8066666B2 (en) | 1993-10-27 | 2011-11-29 | Schneider (Europe) A.G. | Multilayer interventional catheter |
| US8216498B2 (en) | 2008-09-10 | 2012-07-10 | Boston Scientific Scimed, Inc. | Catheter having a coextruded fluoropolymer layer |
| CN103157173A (en) * | 2013-02-04 | 2013-06-19 | 中国人民解放军第三军医大学第二附属医院 | Infusion tube of human organs |
| US9232948B2 (en) | 2003-12-23 | 2016-01-12 | Stryker Corporation | Catheter with distal occlusion apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2043289T3 (en) | 1989-09-25 | 1993-12-16 | Schneider Usa Inc | THE EXTRUSION OF MULTIPLE LAYERS AS A PROCEDURE FOR MAKING ANGIOPLASTY BALLS. |
| WO1995009667A1 (en) | 1993-10-01 | 1995-04-13 | Boston Scientific Corporation | Medical device balloons containing thermoplastic elastomers |
| US6165166A (en) | 1997-04-25 | 2000-12-26 | Schneider (Usa) Inc. | Trilayer, extruded medical tubing and medical devices incorporating such tubing |
-
1987
- 1987-08-25 GB GB8720049A patent/GB2209121B/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5195969A (en) * | 1991-04-26 | 1993-03-23 | Boston Scientific Corporation | Co-extruded medical balloons and catheter using such balloons |
| WO1992019316A1 (en) * | 1991-04-26 | 1992-11-12 | Boston Scientific Corporation | Co-extruded medical balloons and catheter using such balloons |
| US7781038B2 (en) | 1993-10-01 | 2010-08-24 | Boston Scientific Scimed, Inc. | Medical device balloons containing thermoplastic elastomers |
| US5843032A (en) * | 1993-10-27 | 1998-12-01 | Schneider (Europe) Ag | Catheter with multilayer tube |
| US8066666B2 (en) | 1993-10-27 | 2011-11-29 | Schneider (Europe) A.G. | Multilayer interventional catheter |
| US7942849B2 (en) | 1993-10-27 | 2011-05-17 | Schneider Gmbh | Catheter with multilayer tube |
| US5538510A (en) * | 1994-01-31 | 1996-07-23 | Cordis Corporation | Catheter having coextruded tubing |
| US5820594A (en) * | 1994-01-31 | 1998-10-13 | Cordis Corporation | Balloon catheter |
| US5824173A (en) * | 1994-01-31 | 1998-10-20 | Cordis Corporation | Method for making a balloon catheter |
| US5728064A (en) * | 1994-09-16 | 1998-03-17 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5545133A (en) * | 1994-09-16 | 1996-08-13 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US6190354B1 (en) | 1994-09-16 | 2001-02-20 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5647847A (en) * | 1994-09-16 | 1997-07-15 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US5695468A (en) * | 1994-09-16 | 1997-12-09 | Scimed Life Systems, Inc. | Balloon catheter with improved pressure source |
| US7815625B2 (en) | 1998-10-23 | 2010-10-19 | Boston Scientific Scimed, Inc. | Catheter having improved bonding region |
| US8292874B2 (en) | 1998-10-23 | 2012-10-23 | Boston Scientific Scimed, Inc. | Catheter having improved bonding region |
| US8636717B2 (en) | 1998-10-23 | 2014-01-28 | Boston Scientific Scimed, Inc. | Catheter having improved bonding region |
| GB2365342B (en) * | 2000-08-02 | 2002-07-31 | Christopher Leonard Watts | Self-Inflating Medical Device and Inflation Unit For Use Therewith |
| GB2365342A (en) * | 2000-08-02 | 2002-02-20 | Christopher Leonard Watts | Self-inflating medical apparatus |
| US7641669B2 (en) | 2001-01-26 | 2010-01-05 | Boston Scientific Scimed, Inc. | Intravascular occlusion balloon catheter |
| US6786887B2 (en) | 2001-01-26 | 2004-09-07 | Scimed Life Systems, Inc. | Intravascular occlusion balloon catheter |
| GB2371754B (en) * | 2001-02-02 | 2005-09-21 | Biocompatibles Ltd | Balloon catheter inflation |
| US9232948B2 (en) | 2003-12-23 | 2016-01-12 | Stryker Corporation | Catheter with distal occlusion apparatus |
| US8216498B2 (en) | 2008-09-10 | 2012-07-10 | Boston Scientific Scimed, Inc. | Catheter having a coextruded fluoropolymer layer |
| CN103157173A (en) * | 2013-02-04 | 2013-06-19 | 中国人民解放军第三军医大学第二附属医院 | Infusion tube of human organs |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8720049D0 (en) | 1987-09-30 |
| GB2209121B (en) | 1991-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920825 |