WO2011089014A1 - Cathéter à élément d'écartement - Google Patents

Cathéter à élément d'écartement Download PDF

Info

Publication number
WO2011089014A1
WO2011089014A1 PCT/EP2011/000267 EP2011000267W WO2011089014A1 WO 2011089014 A1 WO2011089014 A1 WO 2011089014A1 EP 2011000267 W EP2011000267 W EP 2011000267W WO 2011089014 A1 WO2011089014 A1 WO 2011089014A1
Authority
WO
WIPO (PCT)
Prior art keywords
cannula
spacer
catheter
webs
catheter according
Prior art date
Application number
PCT/EP2011/000267
Other languages
German (de)
English (en)
Inventor
Markus Cybulla
Original Assignee
Markus Cybulla
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Markus Cybulla filed Critical Markus Cybulla
Publication of WO2011089014A1 publication Critical patent/WO2011089014A1/fr

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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
    • 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
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
    • 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
    • A61M29/00—Dilators with or without means for introducing media, e.g. remedies
    • A61M29/02—Dilators made of swellable material
    • 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
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M2025/0024—Expandable catheters or sheaths
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0082—Catheter tip comprising a tool
    • A61M25/0084—Catheter tip comprising a tool being one or more injection needles
    • A61M2025/0089—Single injection needle protruding axially, i.e. along the longitudinal axis of the catheter, from the distal tip
    • 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
    • A61M25/06—Body-piercing guide needles or the like
    • A61M25/0662—Guide tubes
    • A61M2025/0681—Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
    • 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
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/0013—Weakening parts of a catheter tubing, e.g. by making cuts in the tube or reducing thickness of a layer at one point to adjust the 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0082—Catheter tip comprising a tool
    • A61M25/0084—Catheter tip comprising a tool being one or more injection needles

Definitions

  • Catheters are used in many areas of medicine and are indispensable there. Examples of this are, above all, venous accesses to the infusion of fluids.
  • a conventional catheter comprises a cannula and at least one lumen, the cannula having the task, for example, of penetrating a vessel and thus establishing a fluidic connection between the lumen and the vessel.
  • the catheter once a catheter has been set, it remains in the patient's body for a period of several hours or even several days for access, be it for infusion of medication or infusion, and / or
  • Inner has a guide wire.
  • a distal portion of the cannula is a radially expandable wire mesh
  • the invention has for its object to provide a catheter that can remain with high reliability for a longer duration in the body of the patient, without causing obstruction of the cannula or the vessel in which the cannula is located.
  • Spacer is arranged and that the spacer is partially resilient in the radial direction.
  • the present invention describes a catheter
  • the spacer is preferably made of a
  • Shape memory alloy (Nitinol) or one
  • highly elastic material preferably a highly elastic polymer manufactured.
  • the expanded spacer prevents damage to the surrounding tissue. Further, since the lumen of the catheter or cannula is protected by the cup, the adherence of the catheter Catheter to the vessel wall no longer possible, allowing a constant undisturbed fluid flow.
  • the spacer according to the invention expands in a very small, but nevertheless effective measure the vessel in which the cannula is located in the radial direction, so that the free
  • the spacer centers the cannula within the vessel so that the tip of the cannula does not abut the vessel wall. This ensures that the cannula does not inflict injury on the vessel wall. Furthermore, it is ensured that the cannula is always surrounded by liquid and thereby the clogging of the cannula can be minimized.
  • catheter according to the invention at the required times to remove body fluid or to introduce a liquid such as a drug or a contrast agent in the vessel.
  • the spacer if it is not prevented by another component from rebounding, at least partially increased in diameter.
  • the spacer has a diameter extension in this rebound state, which leads to a moderate Widening of the vessel wall, in which the spacer is located. This creates space in the vessel so that the body fluid circulating in the vessel can flow past the cannula almost undisturbed. At the same time, it is also ensured that the tip of the cannula does not touch the vessel wall and thus does not hurt from the inside.
  • an indwelling cannula (Braunüle) or an introducer sheath.
  • Introductory lock must be introduced into the vessel. Because a cannula or an introducer sheath can also be placed simultaneously with the catheter according to the invention, the use of the catheter according to the invention is very gentle on the patient.
  • the Kathederspitze can already be withdrawn something, so that in this state, the foremost boundary of the catheter is formed by the spacer.
  • Spacer has no sharp edges. This ensures that the vessel wall from the cannula is not
  • Complications are caused, such as laying a conventional catheter or a conventional cannula.
  • Spacer has webs extending in the axial direction of the spacer, and that the webs are resilient in the radial direction. These webs can
  • a "leaf spring” in the form of a "leaf spring” can be formed by windows are recessed between the webs.
  • the width of the webs is dimensioned so that they are the desired Have spring rate.
  • Direction can be set even with otherwise the same parameters of the travel of the webs in a simple manner.
  • Spacer is at least partially made of a material having a shape memory (so-called memory effect). For then it is possible that the spacer takes its original shape at body temperature in which it has a diameter-expanded portion. At lower temperatures than the body temperature, the spacer has a cylindrical shape and is thus
  • plastics As materials suitable in principle, plastics but also metallic materials, such as NitTiNol, as proved suitable. Further advantages and advantageous
  • FIG. 1 shows a first embodiment of a
  • FIG. 1a the essential components of the catheter according to the invention, namely a cannula 1 and a spacer 3, are in one
  • the inner diameter of the spacer 3 is slightly larger than the outer diameter of the cannula 1, so that the spacer 3 is pushed in the axial direction over the cannula 1 or relative to the cannula 1 is displaceable.
  • a Braunüle or indwelling cannula (5) can be pushed over the spacer 3.
  • the components described are cannula 1,
  • Vascular wall pierces and thus penetrates into the interior of a vessel (not shown).
  • the spacer 3 according to the invention is displaced forward in the axial direction until it covers the sharp tip 7 of the cannula 1. This ensures that the tip 7 causes no damage or injury to the vessel wall.
  • the front end 9 of the spacer 3 is of course very well rounded and has no sharp edges or projections.
  • the illustrated state of the spacers 3 has a certain extent the shape of a thin-walled tube, wherein spaced from the front end 9 webs 11 have remained.
  • the catheter according to the invention comprising the cannula 1, the spacer 3 and, if desired, the
  • Braunüle or indwelling cannula (5) can be created access to a vessel of a patient.
  • Vascular wall (not shown) is slightly widened and, as is particularly well visible in particular from the longitudinal section of Figure 2c, the tip 7 of the cannula 1 is effectively protected by the radially outwardly resilient webs 11. This means that the tip 7 of the cannula 1 can not cause injuries to the vessel wall. At the same time, however, a sufficiently large flow cross-section of the
  • feathered webs 11 kept free, so that circulating in the vessel body fluid can circulate almost undisturbed.
  • a drug can also be a drug, a
  • webs 11 according to the invention is held at a certain distance at a distance to the vessel wall, is also the risk that the cannula 1 added significantly reduced.
  • the cannula 1 can also be withdrawn and replaced by a different cannula or another instrument, for example, when the cannula is inserted and fixed to the patient and the spacer 3 inserted according to the invention.
  • the resiliently spread webs 11, even when the cannula 1 has been pulled, ensure that the patient's vessel is kept open and slightly widened, so that when subsequently a cannula 1 again passes over the indwelling cannula 5 or the cannula 1
  • Spacer 3 is inserted into the vessel of the patient, the access is not blocked and thus without complications and without inconvenience, the desired new cannula 1 or the required new instrument can be introduced.
  • an introducer sheath 13 is provided
  • the introducer sheath 13 like the indwelling cannula 5 also, has the task of introducing the invention
  • Catheter compress the webs 11 radially inwardly, so that the entire arrangement as small as possible
  • Diameter receives and thus the laying of the catheter according to the invention is facilitated. Similar to a
  • Indwelling cannula 5 remains the introducer sheath 13 together with the spacer 3 of the invention attached to the patient and the cannula 1 can be pulled out as needed and replaced by another cannula or another instrument. Otherwise, the statements made with regard to FIGS. 1 and 2 apply correspondingly.
  • FIGS. 5 and 6 a third variant of a
  • the spacer 3 is arranged inside the cannula 1 when the catheter to which the cannula 1 belongs is placed. This situation is shown in FIG. In this case, the cannula 1 takes on the task to press the webs 11 of the spacer 3 in the radial direction inwards, so that the diameter of the entire assembly
  • FIGS. 7 and 8 show a further exemplary embodiment of a spacer 3 according to the invention. This spacer can also be used in the catheters described above with reference to FIGS. 1 to 6.
  • FIG. 7a shows the spacer 3 in an open state in a side view.
  • FIG. 7b shows the spacer 3 in the open state in longitudinal section.
  • spring elements 15 are still formed between the webs 11, which support the spreading of the webs 11. In the illustrated embodiment, the spring elements 15 from the originally tubular
  • Spacer 13 are compressed in the axial direction, so that the webs 11 and the spring elements 15 deform in the radial direction outwards and they permanently assume the shape shown in Figure 7.
  • the spring elements 15 serve to support the spreading of the webs 11 in the radial direction or to allow at all.
  • the spacer 3 can then be assembled with a cannula 1 and an indwelling cannula 5 to form a catheter according to the invention.
  • the indwelling cannula 5 then presses the webs 11 and the spring elements 15 against their Spring force radially together.
  • the webs 11 are made of a resilient material.
  • the webs 11 are radially compressed by the cannula 13 or the cannula 1 so that the catheter can be inserted as easily as possible into the vessel.
  • the spacer 3 is pushed forward out of the cannula 1, the webs 11 spring outward in the radial direction and thereby cause the expansion of the
  • At least the webs 11 of the spacer 3 from a shape memory material, wherein the rebounded state, i. with radially outwardly bent webs is then taken when the material has approximately assumed the body temperature of the patient, t. Previously, i. at lower temperatures, that is
  • Spacer formed as a cylindrical tube and thus can be easily and without complications together with the cannula into the vessel. As soon as the spacer 3 is inside the vessel, it assumes the temperature of the patient. As a result, the shape memory of the material is activated and the webs 11 springs in the radial direction to the outside, as shown in Figures 2, 4 and 6.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Vascular Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne un cathéter possédant un élément d'écartement (3). Cet élément d'écartement (3) s'écarte ou se détend radialement vers l'extérieur lorsqu'il se trouve à l'intérieur d'un vaisseau. De ce fait, la circulation dans le vaisseau est assurée même en présence du cathéter. Simultanément, il ne peut s'obturer que très rarement. Par ailleurs, une pointe (7) de la canule (1) ne peut blesser la paroi intérieure du vaisseau.
PCT/EP2011/000267 2010-01-23 2011-01-24 Cathéter à élément d'écartement WO2011089014A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010005542.5 2010-01-23
DE201010005542 DE102010005542A1 (de) 2010-01-23 2010-01-23 Katheter mit Abstandshalter

Publications (1)

Publication Number Publication Date
WO2011089014A1 true WO2011089014A1 (fr) 2011-07-28

Family

ID=43844593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/000267 WO2011089014A1 (fr) 2010-01-23 2011-01-24 Cathéter à élément d'écartement

Country Status (2)

Country Link
DE (1) DE102010005542A1 (fr)
WO (1) WO2011089014A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017017095A1 (fr) * 2015-07-29 2017-02-02 Ebnet Jens Système de ponction
WO2018134748A1 (fr) * 2017-01-17 2018-07-26 DePuy Synthes Products, Inc. Système d'introduction d'un cathéter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781703A (en) * 1985-10-17 1988-11-01 Menlo Care, Inc. Catheter assembly
US5857464A (en) * 1995-06-07 1999-01-12 Desai; Jawahar M. Catheter for media injection
US6673042B1 (en) 1999-11-22 2004-01-06 Wilfred J. Samson Expandable venous cannula and method of use
US20050027245A1 (en) * 1996-02-23 2005-02-03 Memory Medical Systems, Inc. Medical instrument with slotted memory metal tube
WO2009076224A1 (fr) * 2007-12-06 2009-06-18 Abbott Cardiovascular Systems Inc. Cathéter d'administration d'agent ayant un élément de support de centrage extensible radialement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781703A (en) * 1985-10-17 1988-11-01 Menlo Care, Inc. Catheter assembly
US5857464A (en) * 1995-06-07 1999-01-12 Desai; Jawahar M. Catheter for media injection
US20050027245A1 (en) * 1996-02-23 2005-02-03 Memory Medical Systems, Inc. Medical instrument with slotted memory metal tube
US6673042B1 (en) 1999-11-22 2004-01-06 Wilfred J. Samson Expandable venous cannula and method of use
WO2009076224A1 (fr) * 2007-12-06 2009-06-18 Abbott Cardiovascular Systems Inc. Cathéter d'administration d'agent ayant un élément de support de centrage extensible radialement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017017095A1 (fr) * 2015-07-29 2017-02-02 Ebnet Jens Système de ponction
CN107847714A (zh) * 2015-07-29 2018-03-27 延斯·埃布内特 穿刺系统
AU2016299343B2 (en) * 2015-07-29 2020-09-24 Ebnet Medical Gmbh Puncturing system
US10806902B2 (en) 2015-07-29 2020-10-20 Jens Ebnet Puncturing system
JP2021104346A (ja) * 2015-07-29 2021-07-26 エブネット、イエンスEbnet, Jens 穿刺システム
JP7315915B2 (ja) 2015-07-29 2023-07-27 エブネット・メディカル・ゲーエムベーハー 穿刺システム
WO2018134748A1 (fr) * 2017-01-17 2018-07-26 DePuy Synthes Products, Inc. Système d'introduction d'un cathéter
US10905853B2 (en) 2017-01-17 2021-02-02 DePuy Synthes Products, Inc. System and method for delivering a catheter
US11648375B2 (en) 2017-01-17 2023-05-16 DePuy Synthes Products, Inc. System and method for delivering a catheter

Also Published As

Publication number Publication date
DE102010005542A1 (de) 2011-07-28

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