GB2319183A - Flexible Inner Tube for Cannula Assemblies - Google Patents
Flexible Inner Tube for Cannula Assemblies Download PDFInfo
- Publication number
- GB2319183A GB2319183A GB9722723A GB9722723A GB2319183A GB 2319183 A GB2319183 A GB 2319183A GB 9722723 A GB9722723 A GB 9722723A GB 9722723 A GB9722723 A GB 9722723A GB 2319183 A GB2319183 A GB 2319183A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cannula
- slots
- cannula according
- tubular member
- sheath
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility
-
- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0138—Tip steering devices having flexible regions as a result of weakened outer material, e.g. slots, slits, cuts, joints or coils
Abstract
A flexible inner tube 2 comprises a plastic tubular member having a plurality of part-circumferential slots 21A, 21B. The slots, which are preferably lozenge shaped, form two parallel rows along the length of the tube to impart a transverse flexibility in the tube whilst maintaining its axial rigidity. The openings of the slots are covered by an inner sheath 30 that does not impede their function. Alternatively the slots may be closed by an outer sheath or by filling with a softer more resilient material than the tube. A coupling means 31-36 between the tube and sheath is also provided. The inner cannula may be used in tracheostomy or catheter assemblies and may be straight or naturally curved.
Description
CATHETER ASSEBLIES AND INNER CANNULAE
This invention relates to catheter assemblies and inner cannulae for such assemblies.
The invention is more particularly concerned with catheter assemblies having a catheter and a removable inner cannula.
Some catheter assemblies, such as tracheostomy tubes, have an inner cannula, which is removable from the catheter. By removing and replacing the inner cannula, the secretions that build up within the catheter can be removed without the need to replace the catheter itself. This can reduce the risk of infection and, by avoiding the need to remove the catheter, it can reduce the discomfort, disturbance and trauma caused to the patient.
Although an inner cannula can have advantages, it can reduce the flow through the catheter because the fluid must flow through the inner cannula, which has a smaller internal diameter than that of the catheter itself. Thus, it is desirable that the wall of the inner cannula be as thin as possible and that it be a close fit within the catheter. Where the tracheostomy tube is of a radial shape, that is, it is curved along its entire length, the inner cannula can be similarly shaped so it does not need to bend during insertion, thereby enabling it to be relatively rigid. It is preferable, however, in some cases to use a tracheostomy tube with an anatomical design, in which opposite ends of the tube are relatively straight and linked by a curved section midway. With such a tube, the inner cannula must be able to flex as it is inserted and removed. In an attempt to make the inner cannula as thin as possible and to enable it to flex, the cannula may tend to buckle during insertion and may cause a restriction in flow. To prevent buckling, a circumferentially.corrugated cannula may be used but the corrugations of this can impede gas flow along the catheter appreciably as a result of the reduction in internal diameter and turbulence.
It is an object of the present invention to provide an improved catheter assembly and inner cannula.
According to one aspect of the present invention there is provided a cannula comprising a tubular member having a plurality of slots spaced from one another along the member, each of the slots extending around a part of the circumference of the member so as to increase the flexibility of the member, and the cannula having means occluding the opening through the slots without substantially impeding the ability of the slots to open and close.
The slots are preferably located in two rows extending along opposite sides of the tubular member. The width of each slot preferably exceeds its height, the width of each slot extending around a part of the circumference. The cannula may have a longitudinal region extending along the length of the cannula that is uninterrupted by the slots so to maintain axial rigidity of the cannula. Preferably, the cannula has two of the longitudinal regions extending parallel to one another. The cannula may be formed to have a natural straight shape or a natural curved shape in which case the slots may be located in a first row extending along the outer curve of the cannula and in a second row extending along the inner curve of the cannula. The slots in the first row are preferably wider than the slots in the second row.
The tubular member may be of a plastics material. The means occluding the opening through the slots may be a sheath of material thinner and more flexible than the material of the tubular member. The sheath is preferably of a resilient material and may be applied to the inner surface of the tubular member. Alternatively, the sheath may be shrunk onto the outside of the tubular member. In another example, the means occluding the opening through the slots may be provided by a material filling the slots, which may be injected to fill the slots after injecting material to form the tubular member. One end of the tubular member may have a region uninterrupted by the slots.
According to another aspect of the present invention there is provided a catheter assembly comprising an outer catheter and an inner cannula according to the above one aspect of the invention inserted within said outer catheter.
According to a further aspect of the present invention there is provided a tracheostomy assembly comprising an outer tracheostomy tube and an inner cannula according to the above one aspect of the invention inserted within the outer tube.
A catheter assembly according to the present invention, in the form of a tracheostomy tube assembly, will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a partly cut-away side elevation view of the assembly;
Figure 2 is a side elevation view of the inner cannula;
Figure 3 is a side elevation view of the cannula along the arrow III of Figure 2;
Figure 4 is an enlarged cross-sectional side elevation view of a part of the
cannula; and
Figure 5 is a side elevation view of an alternative inner cannula.
With reference to Figure 1, the catheter assembly comprises a tracheostomy tube or catheter 1 and an inner cannula 2 within the tracheostomy tube.
The tracheostomy tube 1 is of a conventional form, having a patient end 10, which, in use, is inserted within the trachea of a patient, and a machine end 11, which extends at right angles to the patient end 10. In use, the patient end 10 is located in the trachea and the machine end 11 projects from a surgically-made opening in the neck of the patient. The tube 1 has an internal diameter between 3-1 lmm. The patient end 10 and machine end 11 are substantially straight and are interconnected by an intermediate, curved region 12 so that the tube substantially complies with the patient's anatomy. An inflatable cuff 13 encircles the tube 1 close to the patient end 10 and is inflatable via an inflation line 14 and connector 15.
The inflatable cuff 13 is not essential since many tracheostomy tubes do not have such a cuff.
At the machine end 11 of the tube 1, a connector 16 and a flange 17 enable the tube to be held in position on the patient's neck.
With reference now also to Figures 2 to 4, the inner cannula 2 has an outer tubular sleeve 20 is of a bendable plastics material with a wall thickness of about 0.3rnm. The sleeve 20 is straight and has a circular section and an external diameter slightly less than the internal diameter of the catheter 1, so that it can be inserted and withdrawn readily. The wall of the sleeve 20 is formed with eight slots 21A and 21B spaced from one another along the cannula and extending around a part of the circumference of the sleeve so as to increase its flexibility.
Different numbers of slots could be used. The slots may be cut from the cannula or moulded with it. Four of the slots 21A are located in a row on one side of the sleeve 20; the other four slots 21B are located in a row on the opposite side of the sleeve 20. The slots 21A are separated from the slots 21B by two parallel, longitudinal regions 24 and 25, about 3mm wide, that are not interrupted by the slots. The width of the longitudinal regions 24 and 25 need not be 3mm, for example, the width could be less than this, such as twice the wall thickness. The slots 21A and 21B are of lozenge shape tapering towards their ends so that their height is greatest midway across their width, that is, midway between the regions 24 and 25, the width of the slots exceeding their maximum height. Slots of other shapes could, alternatively, be used. The slots 21 A on one side alternate with the slots 21B on the other side along the length of the cannula. A part 26 of the length of the sleeve 20, towards its rear end, does not have any slots.
The cannula 2 also has an inner sheath 30 secured to the inside of the sleeve 20 such as to cover and occlude the slots 21A and 21B. In this respect, the sheath 30 may extend along the entire length of the sleeve 20 or along only that region including the slots. The sheath 30 is thinner than the sleeve, typically being about 0.lmm thick, and is of a flexible, resilient plastics material such as PVC. There are various ways in which the inner sheath 30 can be formed and be attached to the inside of the outer sleeve. For example, the sheath 30 could be blow moulded or insert moulded within the sleeve 20. Alternatively, the sheath 30 could be applied to the outside of the sleeve, such as by heat shrinking a sheath about the sleeve, or by dip moulding, or by wrapping a sheet of material around the sleeve. Adhesives, solvents or heat could be used to attach the sheath 30 securely to the sleeve 20.
At its rear or patient end, the sleeve 20 has a coupling 31 of the same material as the rest of the sleeve and with a thicker wall than the tube, so that it is rigid. The forward end 32 of the coupling 31 is a clip fit within the tracheostomy tube connector 16 by virtue of three radially-projecting pips 33, which engage forwardly of an internal lip (not shown) within the tracheostomy tube connector. A thin flange 34 projects radially from the coupling 31 towards its machine end, so as to limit the extent of insertion of the inner cannula 2. The rear end of the coupling 31 takes the form of a ring 35 hinged by a flexible web 36 to the forward part of the coupling, providing a ring-pull feature enabling the ring to be folded down to facilitate withdrawal of the inner cannula 2 from the tracheostomy tube 1. This feature is described in more detail in GB2205504. The outside of the inner cannula 2 may be lubricated or coated with a lubricious coating to reduce insertion forces.
The cannula is axially rigid, that is, it does not expand along its length when pulled or contract when pushed axially, because ofthe two regions 24 and 25. The slots 21A and 21B, however, considerably increase the flexibility of the cannula 2, the flexibility being greatest in a plane including the centre lines CL of the two series of slots, that is, the line extending at right angles to the length of the slots, midway along their length. Bending the cannula 2 in this plane in one sense causes the slots on one side to open and the slots on the other side to close; bending the cannula in the opposite sense closes the slots on the one side and opens the slots on the other side. The sheath 30 stretches over the slots that open and is compressed over the slots that close so that it provides very little restriction to flexing of the cannula.
Even though the natural shape of the cannula is straight, it has sufficient flexibility to enable its use in tracheostomy tubes with a variety of different curves.
The flexibility of the inner cannula 2 enables it to bend readily to comply with the shape of the catheter 1, when the plane of flexibility of the cannula is aligned with the plane of curvature of the catheter, even though the catheter has two straight regions separated by a curved region. The inner cannula can be relatively thin compared with a corrugated cannula, so that air flow along the assembly is not significantly affected. The rear region 26 of the cannula does not need to bend because it lies in the straight, machine end of the catheter, so there is no need for this part of the cannula to be provided with slots. The regions 24 and 25 give the cannula axial rigidity so that it can be inserted within the outer catheter without any danger of the cannula collapsing axially, like a concertina. The inner sheath 30 gives the inside of the cannula a relatively smooth surface, thereby reducing gas turbulence that might otherwise be caused by the slots, and enables a suction catheter or other device to be inserted without snagging on the slots. Where, however, the sheath is on the outside of the sleeve, this can have advantages because secretions deposited inside the inner cannula will be less easily dislodged, because they collect in the recesses provided by the slots.
Instead of forming the inner cannula with a natural straight shape, it may be formed curved, as shown with the cannula 2' in Figure 5. The sleeve 20' could be injection moulded with the curved shape or extruded and then given the desired curve by heat treatment. Two series of slots 21A' and 21B' are provided in the cannula, one series 21A' extending along the outer curve of the cannula and the other series 21B' extending along the inner curve. The outer slots 21A' are longer than the inner slots 21B' such that the two regions 24' and 25' uninterrupted by slots, which provide the axial rigidity of the cannula, are spaced from one another by about 45". With a cannula preformed to shape in this way, the slots 21A' and 21B' on the outer and inner curve of the cannula are the same width when the cannula is in its natural shape, following the curvature of the outer catheter. The slots will open or close as the cannula 2' is deformed from its natural shape, during insertion and withdrawal. This cannula 2' has the advantage that the lining sheath 30' is only deformed from its natural condition during insertion and withdrawal and not while the cannula is located in the outer catheter 1 during use, so it is less stressed and provides a smoother surface. The cannula also requires less force to insert and remove than a straight cannula.
The openings provided by the slots need not be occluded by a sheath, but could be occluded by some other means, such as, for example, by filling the slots with a material that is softer, more resilient and flexible than the remainder of the cannula, so that the slots can still open and close and passage of material through the slots is prevented. A cannula with slots filled in this way could be made by a two-stage injection moulding technique where the filling material has a lower melting temperature than the main part of the cannula and is injected into the openings through the slots after injecting material to form the main part of the cannula. This arrangement enables the surface of the cannula to be smooth on the inside and outside.
It will be appreciated that the slots could be of different shapes and sizes, that they could be spaced unevenly along the inner cannula to provide maximum flexibility in selected regions. The cannula could have different numbers of slots.
The inner cannula is not confined to tracheostomy tube assemblies but could be used in other assemblies having an outer catheter and an inner cannula.
Claims (24)
1. A cannula comprising a tubular member having a plurality of slots spaced from one
another along the member, wherein each of the slots extends around a part of the
circumference of the member so as to increase the flexibility of the member, and
wherein the cannula has means occluding the opening through said slots without
substantially impeding the ability of the slots to open and close.
2. A cannula according to Claim 1, wherein the slots are located in two rows extending
along opposite sides of the tubular member.
3. A cannula according to Claim 1 or 2, wherein the width of each slot exceeds its
height, and wherein the width of each slot extends around a part of the circumference
of the tubular member.
4. A cannula according to any one of the preceding claims having a longitudinal region
extending along the length of the cannula that is uninterrupted by said slots so as to
maintain axial rigidity of the cannula.
5. A cannula according to Claim 4, wherein said cannula has two of said longitudinal
regions extending parallel to one another.
6. A cannula according to any one of the preceding claims, wherein said cannula is
formed to have a natural straight shape.
7. A cannula according to any one of Claims 1 to 5, wherein said cannula is formed to
have a natural curved shape.
8. A cannula according to Claim 7, wherein said slots are located in a first row extending
along the outer curve of the cannula and in a second row extending along the inner
curve of the cannula.
9. A cannula according to Claim 8, wherein said slots in said first row are wider than
said slots in said second row.
10. A cannula according to any one of the preceding claims, wherein said tubular member
is of a plastics material.
11. A cannula according to any one of the preceding claims, wherein the said means
occluding the opening through said slots is a sheath of material thinner and more
flexible than the material of the tubular member.
12. A cannula according to Claim 11, wherein said sheath is of a resilient material.
13. A cannula according to Claim 11 or 12, wherein said sheath is applied to the inner
surface of said tubular member.
14. A cannula according to Claim 11 or 12, wherein said sheath is shrunk onto the outside
of said tubular member.
15. A cannula according to any one of Claims 1 to 10, wherein the said means occluding
the opening through said slots is provided by a material filling said slots.
16. A cannula according to Claim 15, wherein said material is injected to fill said slots
after injecting material to form the tubular member.
17. A cannula according to any one of the preceding claims, wherein one end of said
tubular member has a region uninterrupted by said slots.
18. A cannula substantially as hereinbefore described with reference to Figures 1 to 4 of
the accompanying drawings.
19. A cannula substantially as hereinbefore described with reference to Figures 1 to 4 as
modified by Figure 5 of the accompanying drawings.
20. A catheter assembly comprising an outer catheter and an inner cannula according to
any one of the preceding claims inserted within said outer catheter.
21. A tracheostomy assembly comprising an outer tracheostomy tube and an inner
cannula according to any one of Claims 1 to 19 inserted within said outer tube.
22. A tracheostomy assembly substantially as hereinbefore described with reference to
Figures 1 to 4 of the accompanying drawings.
23. A tracheostomy assembly substantially as hereinbefore described with reference to
Figures 1 to 4 as modified by Figure 5 of the accompanying drawings.
24. Any novel and inventive feature as hereinbefore described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9623402.6A GB9623402D0 (en) | 1996-11-08 | 1996-11-08 | Catheter assemblies and inner cannulae |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9722723D0 GB9722723D0 (en) | 1997-12-24 |
GB2319183A true GB2319183A (en) | 1998-05-20 |
GB2319183B GB2319183B (en) | 2000-05-03 |
Family
ID=10802734
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9623402.6A Pending GB9623402D0 (en) | 1996-11-08 | 1996-11-08 | Catheter assemblies and inner cannulae |
GB9722723A Expired - Fee Related GB2319183B (en) | 1996-11-08 | 1997-10-29 | Catheter assemblies and inner cannulae |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9623402.6A Pending GB9623402D0 (en) | 1996-11-08 | 1996-11-08 | Catheter assemblies and inner cannulae |
Country Status (6)
Country | Link |
---|---|
US (1) | US6024730A (en) |
EP (1) | EP0861673A3 (en) |
JP (1) | JPH10137338A (en) |
AU (1) | AU724587B2 (en) |
CA (1) | CA2220395A1 (en) |
GB (2) | GB9623402D0 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001095974A1 (en) * | 2000-06-14 | 2001-12-20 | Boston Scientific Limited | Catheter shaft |
WO2004047899A1 (en) | 2002-11-25 | 2004-06-10 | Invatec S.R.L. | Pipe having at least a portion with a variable flexibility |
WO2015063459A1 (en) * | 2013-10-29 | 2015-05-07 | Indian Ocean Medical Inc. | Airway tube |
WO2016011127A3 (en) * | 2014-07-18 | 2016-05-06 | Stryker Corporation | Coated tubular support members and methods of manufacturing same |
Families Citing this family (78)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030069522A1 (en) * | 1995-12-07 | 2003-04-10 | Jacobsen Stephen J. | Slotted medical device |
US6440088B1 (en) * | 1996-05-24 | 2002-08-27 | Precision Vascular Systems, Inc. | Hybrid catheter guide wire apparatus and method |
US6165152A (en) | 1998-09-11 | 2000-12-26 | Advanced Cardiovascular Systems, Inc. | Catheter with a flexible tip and taper and method of manufacture |
DE10109935C2 (en) * | 2000-03-10 | 2003-07-03 | Primed Medizintechnik Gmbh | Tracheostomaprothese |
AU2002354761B8 (en) * | 2001-07-05 | 2009-09-10 | Precision Vascular Systems, Inc. | Torqueable soft tip medical device and method of usage |
US7914467B2 (en) | 2002-07-25 | 2011-03-29 | Boston Scientific Scimed, Inc. | Tubular member having tapered transition for use in a medical device |
JP4602080B2 (en) | 2002-07-25 | 2010-12-22 | ボストン サイエンティフィック リミテッド | Medical devices that travel through the human body structure |
US8377035B2 (en) * | 2003-01-17 | 2013-02-19 | Boston Scientific Scimed, Inc. | Unbalanced reinforcement members for medical device |
US20040167437A1 (en) * | 2003-02-26 | 2004-08-26 | Sharrow James S. | Articulating intracorporal medical device |
US7169118B2 (en) | 2003-02-26 | 2007-01-30 | Scimed Life Systems, Inc. | Elongate medical device with distal cap |
US7001369B2 (en) | 2003-03-27 | 2006-02-21 | Scimed Life Systems, Inc. | Medical device |
US8684967B2 (en) * | 2003-07-15 | 2014-04-01 | Medtronic, Inc. | Kink resistant cannula having buckle resistant apertures |
US20050015072A1 (en) * | 2003-07-15 | 2005-01-20 | Medtronic, Inc. | Cannula having buckle resistant apertures |
JP2005058562A (en) * | 2003-08-18 | 2005-03-10 | Metoran:Kk | Respiratory tract cut-opening cannula |
US7824345B2 (en) | 2003-12-22 | 2010-11-02 | Boston Scientific Scimed, Inc. | Medical device with push force limiter |
JP5358780B2 (en) * | 2004-09-11 | 2013-12-04 | ザ ボード オブ トラスティーズ オブ ザ レランド スタンフォード ジュニア ユニバーシティー | Method and apparatus for modeling modal characteristics of optical waveguides |
US20060264904A1 (en) * | 2005-05-09 | 2006-11-23 | Kerby Walter L | Medical device |
US9445784B2 (en) * | 2005-09-22 | 2016-09-20 | Boston Scientific Scimed, Inc | Intravascular ultrasound catheter |
US20070083132A1 (en) * | 2005-10-11 | 2007-04-12 | Sharrow James S | Medical device coil |
US7850623B2 (en) * | 2005-10-27 | 2010-12-14 | Boston Scientific Scimed, Inc. | Elongate medical device with continuous reinforcement member |
US20070276486A1 (en) * | 2006-05-25 | 2007-11-29 | E. Benson Hood Laboratories | Coated tracheostomy tube and stoma stent or cannula |
US8551020B2 (en) * | 2006-09-13 | 2013-10-08 | Boston Scientific Scimed, Inc. | Crossing guidewire |
US8556914B2 (en) | 2006-12-15 | 2013-10-15 | Boston Scientific Scimed, Inc. | Medical device including structure for crossing an occlusion in a vessel |
US8573218B2 (en) | 2007-03-07 | 2013-11-05 | Michael John RUTTER | Tracheostomy tube |
US20080262474A1 (en) * | 2007-04-20 | 2008-10-23 | Boston Scientific Scimed, Inc. | Medical device |
US9387308B2 (en) | 2007-04-23 | 2016-07-12 | Cardioguidance Biomedical, Llc | Guidewire with adjustable stiffness |
JP2010524631A (en) * | 2007-04-23 | 2010-07-22 | インターヴェンショナル アンド サージカル イノヴェイションズ リミテッド ライアビリティ カンパニー | Guidewire with adjustable stiffness |
CA2690827C (en) * | 2007-07-02 | 2016-03-15 | Frederic Supiez | Endotracheal intubation device, tester and packaging |
US8409114B2 (en) * | 2007-08-02 | 2013-04-02 | Boston Scientific Scimed, Inc. | Composite elongate medical device including distal tubular member |
US20090036832A1 (en) * | 2007-08-03 | 2009-02-05 | Boston Scientific Scimed, Inc. | Guidewires and methods for manufacturing guidewires |
US8105246B2 (en) * | 2007-08-03 | 2012-01-31 | Boston Scientific Scimed, Inc. | Elongate medical device having enhanced torque and methods thereof |
US8821477B2 (en) * | 2007-08-06 | 2014-09-02 | Boston Scientific Scimed, Inc. | Alternative micromachined structures |
US20090043228A1 (en) * | 2007-08-06 | 2009-02-12 | Boston Scientific Scimed, Inc. | Laser shock peening of medical devices |
US9808595B2 (en) * | 2007-08-07 | 2017-11-07 | Boston Scientific Scimed, Inc | Microfabricated catheter with improved bonding structure |
US8597301B2 (en) * | 2007-10-19 | 2013-12-03 | David Mitchell | Cannula with lateral access and directional exit port |
US20090105775A1 (en) * | 2007-10-19 | 2009-04-23 | David Mitchell | Cannula with lateral access and directional exit port |
US7841994B2 (en) | 2007-11-02 | 2010-11-30 | Boston Scientific Scimed, Inc. | Medical device for crossing an occlusion in a vessel |
US8376961B2 (en) | 2008-04-07 | 2013-02-19 | Boston Scientific Scimed, Inc. | Micromachined composite guidewire structure with anisotropic bending properties |
US20090320853A1 (en) * | 2008-06-27 | 2009-12-31 | Mike Kenowski | Tracheostomy Tube |
US20100063479A1 (en) * | 2008-09-10 | 2010-03-11 | Boston Scientific Scimed, Inc. | Small profile, tubular component design and method of manufacture |
US8535243B2 (en) * | 2008-09-10 | 2013-09-17 | Boston Scientific Scimed, Inc. | Medical devices and tapered tubular members for use in medical devices |
US8104475B2 (en) * | 2008-11-05 | 2012-01-31 | Smiths Group Plc | Medical tube assemblies |
US8795254B2 (en) * | 2008-12-10 | 2014-08-05 | Boston Scientific Scimed, Inc. | Medical devices with a slotted tubular member having improved stress distribution |
AU2010232448B2 (en) * | 2009-04-03 | 2013-11-14 | Scientia Vascular, Inc. | Micro-fabricated catheter and guidewire devices |
US20100300449A1 (en) * | 2009-05-28 | 2010-12-02 | Chan Sam C | Position Indicator for Tracheostomy Tube |
US20100300448A1 (en) * | 2009-05-28 | 2010-12-02 | Kenowski Michael A | Tracheostomy Tube |
US20110077620A1 (en) * | 2009-09-30 | 2011-03-31 | Debeer Nicholas C | Guide Catheters |
US8137293B2 (en) | 2009-11-17 | 2012-03-20 | Boston Scientific Scimed, Inc. | Guidewires including a porous nickel-titanium alloy |
US8551021B2 (en) | 2010-03-31 | 2013-10-08 | Boston Scientific Scimed, Inc. | Guidewire with an improved flexural rigidity profile |
US8795202B2 (en) | 2011-02-04 | 2014-08-05 | Boston Scientific Scimed, Inc. | Guidewires and methods for making and using the same |
US9072874B2 (en) | 2011-05-13 | 2015-07-07 | Boston Scientific Scimed, Inc. | Medical devices with a heat transfer region and a heat sink region and methods for manufacturing medical devices |
US8956376B2 (en) | 2011-06-30 | 2015-02-17 | The Spectranetics Corporation | Reentry catheter and method thereof |
WO2013003757A2 (en) | 2011-06-30 | 2013-01-03 | The Spectranetics Corporation | Reentry catheter and method thereof |
US8998936B2 (en) * | 2011-06-30 | 2015-04-07 | The Spectranetics Corporation | Reentry catheter and method thereof |
US20130116556A1 (en) * | 2011-11-05 | 2013-05-09 | Custom Medical Applications | Neural safety injection system and related methods |
US9480808B2 (en) * | 2012-07-25 | 2016-11-01 | Neil T Winthrop | Tracheostomy devices and methods of use |
US9010326B2 (en) | 2012-08-02 | 2015-04-21 | Covidien Lp | Compressible connector for an inner cannula |
US9044575B2 (en) | 2012-10-22 | 2015-06-02 | Medtronic Adrian Luxembourg S.a.r.l. | Catheters with enhanced flexibility and associated devices, systems, and methods |
EP2908755B1 (en) | 2012-10-22 | 2019-04-17 | Medtronic Ardian Luxembourg S.à.r.l. | Catheters with enhanced flexibility |
US9265906B2 (en) | 2013-02-25 | 2016-02-23 | Covidien Lp | Compressible cannula connector with release grip |
GB201303553D0 (en) * | 2013-02-28 | 2013-04-10 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
US9066726B2 (en) | 2013-03-15 | 2015-06-30 | Medtronic Ardian Luxembourg S.A.R.L. | Multi-electrode apposition judgment using pressure elements |
WO2014189794A1 (en) | 2013-05-18 | 2014-11-27 | Medtronic Ardian Luxembourg S.A.R.L. | Neuromodulation catheters with shafts for enhanced flexibility and control and associated devices, systems, and methods |
US9907921B2 (en) | 2013-11-14 | 2018-03-06 | Covidien Lp | Tracheostomy tube with inner cannula |
GB201401929D0 (en) * | 2014-02-05 | 2014-03-19 | Smiths Medical Int Ltd | Tracheostimy tube assemblies and inner cannilae |
US9901706B2 (en) | 2014-04-11 | 2018-02-27 | Boston Scientific Scimed, Inc. | Catheters and catheter shafts |
KR101547089B1 (en) * | 2015-03-31 | 2015-08-24 | 한국과학기술원 | Catheter with steering function using medicine injection channel |
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 |
GB201515450D0 (en) | 2015-08-29 | 2015-10-14 | Smiths Medical Int Ltd | Tracheostomy tube assemblies and inner cannulae |
US11351048B2 (en) | 2015-11-16 | 2022-06-07 | Boston Scientific Scimed, Inc. | Stent delivery systems with a reinforced deployment sheath |
JP6115875B1 (en) * | 2015-12-10 | 2017-04-19 | 株式会社パタカラ | catheter |
US10532500B2 (en) * | 2017-08-22 | 2020-01-14 | Manabe Industry Co., Ltd. | Hollow product and method of making the product |
USD882036S1 (en) * | 2018-06-26 | 2020-04-21 | Elliot Kremerman | Vacuum distillation hose |
GB201812443D0 (en) * | 2018-07-28 | 2018-09-12 | Smith Medical International Ltd | Tracheal tubes |
GB201812444D0 (en) * | 2018-07-28 | 2018-09-12 | Smith Medical International Ltd | Tracheal tubes |
US11642449B2 (en) * | 2018-10-24 | 2023-05-09 | New Wave Endo-Surgical Corp. | Specialized suction irrigator with clot busting and anti-clogging features |
WO2021183614A1 (en) * | 2020-03-11 | 2021-09-16 | Stryker Corporation | Slotted medical devices with fillers |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0215173A1 (en) * | 1985-09-02 | 1987-03-25 | Warner-Lambert Technologies, Inc. | Catheter with optimum resistance to bending and method of manufacture |
US4801297A (en) * | 1984-06-01 | 1989-01-31 | Edward Weck Incorporated | Catheter having slit tip |
GB2208806A (en) * | 1985-05-22 | 1989-04-19 | Bard Inc C R | Catheter |
EP0430542A2 (en) * | 1989-11-29 | 1991-06-05 | Kabushiki Kaisha Machida Seisakusho | Method of producing flexible tube |
GB2285583A (en) * | 1994-01-11 | 1995-07-19 | Leo Ronald Winlo | Controlled bending of an endotracheal tube |
WO1996006653A1 (en) * | 1994-09-01 | 1996-03-07 | Cordis Corporation | Soft flexible catheter tip for use in angiography |
WO1996038193A1 (en) * | 1995-05-31 | 1996-12-05 | Cardia Catheter Co. | Flexible tubular device for use in medical applications |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2923299A (en) * | 1957-10-17 | 1960-02-02 | Robert C Blackwood | Tracheostomy tube device |
US4353358A (en) * | 1980-08-28 | 1982-10-12 | Emerson Reynolds L | Sigmoidoscope |
US4471776A (en) * | 1980-12-08 | 1984-09-18 | Cox Everard F | Static tracheostomy tube |
US4852565A (en) * | 1988-03-22 | 1989-08-01 | Shiley Inc. | Fenestrated tracheostomy tube |
US5507751A (en) * | 1988-11-09 | 1996-04-16 | Cook Pacemaker Corporation | Locally flexible dilator sheath |
-
1996
- 1996-11-08 GB GBGB9623402.6A patent/GB9623402D0/en active Pending
-
1997
- 1997-10-27 EP EP97308534A patent/EP0861673A3/en not_active Withdrawn
- 1997-10-29 GB GB9722723A patent/GB2319183B/en not_active Expired - Fee Related
- 1997-11-03 US US08/962,734 patent/US6024730A/en not_active Expired - Lifetime
- 1997-11-04 JP JP9301871A patent/JPH10137338A/en active Pending
- 1997-11-06 CA CA002220395A patent/CA2220395A1/en not_active Abandoned
- 1997-11-06 AU AU44374/97A patent/AU724587B2/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801297A (en) * | 1984-06-01 | 1989-01-31 | Edward Weck Incorporated | Catheter having slit tip |
GB2208806A (en) * | 1985-05-22 | 1989-04-19 | Bard Inc C R | Catheter |
EP0215173A1 (en) * | 1985-09-02 | 1987-03-25 | Warner-Lambert Technologies, Inc. | Catheter with optimum resistance to bending and method of manufacture |
EP0430542A2 (en) * | 1989-11-29 | 1991-06-05 | Kabushiki Kaisha Machida Seisakusho | Method of producing flexible tube |
GB2285583A (en) * | 1994-01-11 | 1995-07-19 | Leo Ronald Winlo | Controlled bending of an endotracheal tube |
WO1996006653A1 (en) * | 1994-09-01 | 1996-03-07 | Cordis Corporation | Soft flexible catheter tip for use in angiography |
WO1996038193A1 (en) * | 1995-05-31 | 1996-12-05 | Cardia Catheter Co. | Flexible tubular device for use in medical applications |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001095974A1 (en) * | 2000-06-14 | 2001-12-20 | Boston Scientific Limited | Catheter shaft |
US6475184B1 (en) | 2000-06-14 | 2002-11-05 | Scimed Life Systems, Inc. | Catheter shaft |
WO2004047899A1 (en) | 2002-11-25 | 2004-06-10 | Invatec S.R.L. | Pipe having at least a portion with a variable flexibility |
US7771410B2 (en) | 2002-11-25 | 2010-08-10 | Invatec S.R.L. | Pipe having at least a portion with a variable flexibility |
WO2015063459A1 (en) * | 2013-10-29 | 2015-05-07 | Indian Ocean Medical Inc. | Airway tube |
AU2014343497B2 (en) * | 2013-10-29 | 2018-12-20 | Indian Ocean Medical Inc. | Airway tube |
TWI657839B (en) * | 2013-10-29 | 2019-05-01 | 塞席爾商印度海洋醫療有限公司 | Airway tube |
US10864339B2 (en) | 2013-10-29 | 2020-12-15 | Indian Ocean Medical Inc. | Airway tube |
WO2016011127A3 (en) * | 2014-07-18 | 2016-05-06 | Stryker Corporation | Coated tubular support members and methods of manufacturing same |
US9974926B2 (en) | 2014-07-18 | 2018-05-22 | Stryker Corporation | Coated tubular support members and methods of manufacturing same |
Also Published As
Publication number | Publication date |
---|---|
US6024730A (en) | 2000-02-15 |
EP0861673A2 (en) | 1998-09-02 |
GB9722723D0 (en) | 1997-12-24 |
EP0861673A3 (en) | 1998-10-21 |
GB2319183B (en) | 2000-05-03 |
JPH10137338A (en) | 1998-05-26 |
CA2220395A1 (en) | 1998-05-08 |
AU724587B2 (en) | 2000-09-28 |
AU4437497A (en) | 1998-05-14 |
GB9623402D0 (en) | 1997-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6024730A (en) | Catheter assemblies and inner cannulae | |
US6019753A (en) | Catheter assemblies and inner cannulae | |
US8783254B2 (en) | Tracheostomy tubes | |
US5983895A (en) | Tracheostomy tubes and assemblies | |
JP5107909B2 (en) | Male extracorporeal catheter and method of making the catheter | |
US11534578B2 (en) | Catheter tube | |
US20120180796A1 (en) | Tracheostomy Tubes | |
BRPI0409320B1 (en) | LANGUAGE MASK AND METHOD FOR YOUR MANUFACTURING | |
US5758656A (en) | Stylet for controlled deformation of a tube | |
US3948274A (en) | Tracheal tube with disposable cannula | |
US20170095629A1 (en) | Tracheostomy tube assemblies and inner cannulae | |
WO2008009947A1 (en) | Tracheal tubes | |
US20150374942A1 (en) | Tracheostomy tube assemblies and inner cannulae | |
GB2331933A (en) | Flexible cannula | |
US20230117994A1 (en) | Medico-surgical tubes | |
US8382664B2 (en) | Molded and undivided medical penetrating device | |
US8047986B2 (en) | Molded and undivided medical penetrating device | |
GB2306112A (en) | A tracheostomy tube | |
EP1079726A1 (en) | Stylet for controlled deformation of a tube | |
EP2961456A1 (en) | Tracheostomy tube assemblies and inner cannulae |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20051029 |