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
• • 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
  • A61M25/09—Guide wires
  • A61M25/09041—Mechanisms for insertion of guide wires

Definitions

• the present invention relates to a guide pass, of the type adapted for the introduction of a guide into a stop valve of an interventional material comprising a body delimiting a guide guide duct, the duct opening at its two ends, the body having, from a first end of the conduit, a tapered cannula extending along the axis of the conduit and suitable for being engaged through the stop valve.
• a guide pass is used in cardiology and radiology or interventional imaging, in particular for interventional cardiology procedures or medical radiology procedures.
• a guide pass makes it possible to introduce a very flexible surgical guide into the blood circulation network.
• the guide is formed from a very flexible steel wire up to two meters in length.
• the wire is made up of braided steel strands and is possibly coated with a plastic sheath.
• the guide is intended to form a support for the introduction, movement and use of various interventional tools, such as catheters, balloons and stents.
• a catheter is first introduced into a patient's vein or artery.
• the catheter is provided at its end located outside the patient with a sealed stop valve allowing the introduction of the various tools into the patient's body from the catheter.
• This valve is generally formed in a connector having a bypass.
• Such a connector equipped with a valve is known as the Y connector.
• the valve is formed from a deformable rubber diaphragm.
• a guide pass serves to ensure the opening of the valve and the passage of the guide through the valve.
• the guide is indeed too flexible to be engaged alone through the valve.
• Guide rails currently known include a body defining a guide passage conduit. The body has at one end of the conduit a cannula which can be introduced into the valve to allow passage of the guide.
• the guide bushings are formed for example of a stainless steel or plastic tube forming the cannula at one end of which is attached, by gluing or overmolding, a plastic base.
• the guide is introduced into the conduit of the guide pass by one end of the conduit passing through the base.
• the guide pass cannula is introduced through the valve.
• the guide is then gradually inserted into the catheter and then into the patient's bloodstream.
• the guide rail is finally removed to allow the passage of the tools along the guide.
• the guide-guide is removed by circulating the guide-pass along the entire length of the part of the guide-pass not introduced into the catheter.
• the object of the invention is to provide a guide pass which can be easily removed from the guide without risk of damaging the latter.
• the subject of the invention is a guide pass of the aforementioned type, characterized in that the body has a slot extending longitudinally along the length of the conduit from one end to the other of this conduit and opening into the duct along its entire length.
• the guide rail includes one or more of the following characteristics:
• the body is made of a single piece
• the cannula extends over a length greater than 50% of the total length of the conduit
• the outer surface of the cannula is generally frustoconical and widens gradually from said first end of the conduit;
• the body has around the second end of the duct a divergent frustoconical wall extending said cannula axially; - The diameter of the conduit along the length of the body is gradually increasing from the first end to the second end;
• the minimum diameter of the duct is between 0.30 mm and 1 mm;
• the width of the slot is between 0.15 mm and 0.50 mm; - The ratio of the minimum diameter of the conduit to the width of the slot is between 5 and 9;
• the length of the duct is between 7 cm and 13 cm and
• the body has two internal chamfers formed along the entire length of the slot between each of the opposite side walls of the slot and the surface of the conduit.
• FIG. 2 is a rear three-quarter perspective view of the guide rail according to the invention.
• FIGS. 3 and 4 are views in longitudinal section along two planes perpendicular to each other of the guide rail according to the invention.
• FIG. 5 is an end view of the guide rail taken along arrow F5 of Figure 4.
• FIG. 6 is a view identical to that of Figure 3 of an alternative embodiment of a guide rail according to the invention.
• the guide pass 8 shown in the figures is intended for the passage of a guide whose diameter is between 0.010 inches and 0.023 inches, that is to say between 0.25 mm and 0.58 mm.
• the guide pass 8 is formed of a one-piece body 10, that is to say that it is formed in one piece.
• the body is made of injected plastic.
• the body of the guide is preferably made of a colored material. It is advantageously yellow in color in order to avoid its loss.
• the body 10 defines a conduit 12 passing right through the body and emerging at its two ends.
• the body 10 is elongated and has a length measured along the axis XX of the conduit 12 between 7 cm and 15 cm and for example equal to 106 mm, in the embodiment considered.
• the body 10 has, along the axis XX, a main section 14 forming a cannula extended by a section 16 for centering the guide and for gripping the guide pass as illustrated in FIGS. 3 and 4.
• the cannula 14 extends over at least 50% of the length of the duct 12. It has a length, for example equal to 94 mm.
• the cannula 14 has, in section, a circular circumference. On the outside, it has a progressively increasing diameter from its free end to its connection end to the section 16. Its external diameter varies from 1.7 mm at its free end to around 3 mm at its connection end to the section 16.
• the cannula has a generally frustoconical external surface.
• the conduit 12 gradually widens from the free end of the cannula towards its connection end.
• the minimum diameter of the conduit is preferably between 0.3 mm and 1 mm. This diameter varies for example from 0.65 mm to 1.50 mm.
• the thickness of the generally frustoconical wall of the cannula is substantially constant.
• the cannula At its free end, the cannula has externally a leave 18 facilitating its introduction into the valve.
• the centering and gripping section 16 has a length of approximately 12 mm. This section is delimited by a generally frustoconical wall 20 extending the cannula 14 along the axis X-X of the conduit. The inclination of the frustoconical wall 20 with respect to the axis X-X is greater than the inclination of the wall delimiting the cannula 14.
• the internal diameter of the conduit 12 varies according to the length of the section 16 from 1.5 mm to 4.5 mm.
• the inner surface of the frustoconical wall 16 forms a divergent surface towards its open end constituting a cone 22 for centering the guide during its introduction.
• the section 16 has an external peripheral flange 23 facilitating the gripping of the guide pass.
• This collar has a diameter of 8 mm.
• the body 10 of the guide pass has a slot 24 formed along the entire length of the conduit 12 and opening into this conduit.
• the slot 24 thus crosses the entire thickness of the body 10.
• the slot is rectilinear and is formed in a plane passing through the axis XX of the duct.
• the width of the slot is between 0.15 mm and 0.50 mm. In the example considered, its width is equal to 0.25 mm.
• the width of the slot is less than the minimum diameter of the duct 12.
• the ratio of the minimum diameter of the duct to the width of the slot 24 is between 5 and 9. It is equal to substantially 7 in the mode of envisaged realization.
• the side walls denoted 26 of the body delimiting the slot extend parallel to one another. These side walls are connected to the surface of the conduit 12 by internal chamfers 28 formed along the entire length of the conduit.
• the guide rail according to the invention is used in the following manner.
• the guide pass is held with one hand from the gripping section 16.
• the guide is introduced into the guide pass for example by engaging the end of the guide in the centering cone 22 defined by the enlarged part of the conduit in the section 16 of the guide pass.
• the guide pass cannula is then engaged in the valve, the diaphragm of which is deformed by the passage of the cannula.
• the guide is then gradually pushed into the catheter and then into the patient's body by sliding in the guide pass conduit. The minimum diameter of the conduit being greater than the diameter of the guide, this sliding takes place easily.
• the guide pass is removed from the valve by traveling a short distance along the length of the guide.
• the guide pass is then removed laterally from the guide, being released laterally, the guide passing through the slot 24.
• the guide pass is pulled transversely to the guide from its end carrying the flange, so that the pass -guide is gradually released from the guide first by the section 16 and then by the cannula. It is understood that the procedure for removing the guide rail can be carried out with one hand.
• the presence of the chamfers 28 prevents the guide from being damaged when the guide pass is removed.
• the presence of the slot 24 on the guide pass also allows a replacement of the guide pass when a movement of the guide is necessary while the guide is still engaged through the slot.
• FIG 6 is shown an alternative embodiment of a guide pass according to the invention.
• This guide pass has a general shape identical to the guide pass described above and differs only in these dimensions.
• the guide pass 108 is also intended for the passage of a guide with a diameter between 0.25 and 0.58 mm. Its body 110 delimits a duct 112 of diameter greater than the diameter of the duct 12 of the preceding guide pass. The total length of the body 110 is 105 mm.
• the body consists of a main section 114 forming a cannula extended by a section 116 for centering the guide and for gripping the guide pass.
• the cannula 114 with a length of 94 mm in the example considered and extends over at least 50% of the length of the conduit 112. Its circumference is circular. Its external diameter is gradually increasing, this varying from 2.8 to 3 mm at its connection end to the section 116.
• the conduit 112 gradually widens from its free end of the cannula towards its connection end.
• the minimum diameter of the conduit 112 is preferably between 1.5 and 2.5 mm. Its diameter varies for example from 2 mm to 2.2 mm depending on the length of the cannula 114.
• the maximum diameter of the conduit 112 at the end of the cannula 114 is preferably between 1.05 and 2.4 times the minimum diameter of the duct 112.
• the slot 124 formed over the entire length of the conduit has a width in this embodiment between 0.08 and 0.15 mm. It is for example 0.12 mm.
• the ratio of the minimum diameter of the duct 112 to the width of the slot 124 is between 12 and 22. In the embodiment shown, this ratio is equal to substantially 17.
• the internal diameter of the conduit 112, at least along the length of the cannula 114 is greater than the corresponding diameter of the conduit of the guide pass of the previous embodiment. Thus, the manufacture of the guide pass is easier.
• ribs for example four in number, are provided on the outer surface of the generally frustoconical wall 120 to facilitate gripping of the guide pass.

Landscapes

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=32605841

Family Applications (1)

Country Status (4)

Families Citing this family (17)

Family Cites Families (8)

• 2003
  • 2003-01-17 FR FR0300527A patent/FR2850028B1/fr not_active Expired - Fee Related
• 2004
  • 2004-01-15 EP EP04702351A patent/EP1583580A2/de not_active Withdrawn
  • 2004-01-15 WO PCT/FR2004/000074 patent/WO2004066907A2/fr active Application Filing
  • 2004-01-15 US US10/542,443 patent/US20060116691A1/en not_active Abandoned

Non-Patent Citations (1)

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