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
  • A61M25/06—Body-piercing guide needles or the like
  • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
  • A61M25/0637—Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin
• • 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

Definitions

• the invention relates to a vein-indwelling cannula with a cannula body consisting essentially of a plastic cannula and a handle attachment and with a puncture inner cannula having a metal cannula (male).
• the intravenous injection and the intravenous continuous drip infusion are indispensable for all medical therapy. They developed in many small steps and over a long period of time. Methods for bloodletting and for the purpose of administering medication have been known for a long time.
• Vin indwelling cannulas are used here, the function of which will be described in detail below.
• a suitable vein is selected first.
• veins that are as distal as possible, so that in the event of thrombosis later, continuous proximal veins can be used.
• veins in the area of the joints must be avoided because otherwise injuries or even punctures of the vein wall can occur during movements despite the fixation of the cannula.
• the known plastic vein cannulas shown at the beginning consist first of all of a puncture inner cannula whose actual cannula consists of metal (so-called stylet), which has a conically ending, tight-fitting plastic cannula pushed onto it.
• stylet metal
• the length of the plastic cannula is slightly shorter than the stylet and the transition on the conical part in the area of the cannula tip is infinitely variable due to precise processing, so that a deformation of the conical (plastic) cannula tip complicating the penetration of the tissue is correct when correct Handling is excluded.
• the indwelling vein cannula is fixed to the support wings provided on the cannula body by adhesive strips or the like on the skin, and the injection syringe or the infusion system is connected.
• the known venous cannula is already very well developed with regard to its use.
• complications can also arise after placement, which are due to the fact that reliable fixation is achieved in the area of the actual cannula, but the transition between the cannula chamber and the mouth of the infusion tube does not permit optimal fixation.
• this part of the venous cannula protrudes from the attached "triangle" (puncture site - right support wing - left support wing) as an extension of the cannula longitudinal axis.
• careless or unconscious movement of the patient e.g. B.
• the infusion tube can detach itself from the venous stay cannula or - due to the leverage of this protruding free end of the cannula - injuries in the actual access area or inside the vein.
• the invention is therefore based on the object of designing and developing the aforementioned venous cannula so that the aforementioned disadvantages are avoided and that the venous cannula is improved in its entirety. Furthermore, it is desirable to facilitate the handling of the venous indwelling cannula or to improve its function without having to forego the known advantages.
• the vein-indwelling cannula according to the invention in which the above-described object is achieved, is initially and essentially characterized in that the cannula body is provided with a flexure in the region of the handle attachment.
• This configuration according to the invention ensures that movements transmitted via the infusion tube to the vein cannula can no longer be transmitted to the plastic cannula located in the vein.
• the indwelling vein cannula in the area between the puncture point and the receiving opening for the injection syringe or the infusion tube can no longer act as a rigid lever, so that the possibility of undesired injuries can be reliably excluded.
• FIG. 1 is a side view of the venous residence cannula according to the invention in the assembled state with protective hood,
• FIG. 2 shows a side view of the venous cannula according to the invention in the pulled-apart state with the protective hood removed
• SPARE BLADE 3 shows a top view of the venous cannula according to the invention from FIG. 2,
• FIG. 4 shows a side view of part of the venous cannula according to the invention from FIG. 2,
• FIG. 5 shows a top view of the part of the venous indwelling cannula according to the invention from FIGS. 4 and
• Fig. 6 shown enlarged, a section of. Vein indwelling cannula according to the invention according to the dash-dotted circle from FIGS. 3 and 5.
• FIGS. 2 and 3 show a side view of the venous indwelling cannula according to the invention, designated as a whole by 1.
• the vein indwelling cannula 1 which is regularly designed as a one-time cannula, is in this assembled state before it is used for the first time.
• the vein indwelling cannula 1 is shown in FIGS. 2 and 3 as a side view or top view in its individual components.
• the vein indwelling cannula 1 initially has the cannula body 2 with a handle attachment 3 and a plastic cannula 4 molded thereon.
• Molded support wings 5 also serve as adhesive and support surfaces for attaching the vein cannula 1 to the skin.
• Their undersides are often provided with notches in order to better adapt to the contour of an arm, for example.
• FIGS. 1 to 3 also show that inside the cannula body 2 made of plastic there is a puncture inner cannula 6, which is provided with a metal cannula, the so-called male 7.
• the tip of the stylet 7 is ground, as can be seen particularly clearly from FIGS. 2 and 3.
• the puncture inner cannula 6 is equipped with a holding web 8 for better handling.
• the vein indwelling cannula 1 is closed with a stylet closure 9, which is designed so that it can also serve to close the cannula body 2 after removal of the stylet 7. For this purpose - and of course for receiving an injection (not shown)
• both the cannula body 2 and the puncture inner cannula 6 are designed like a hollow cylinder at their end facing away from the tip.
• facing away from the tip end of the body 2 Kanülen ⁇ is provided in the region of the handle neck 3 with a flexure 11, so that the course of the injection syringe bz w '. the tip of the infusion tube no longer has to point in the direction of the cannula longitudinal axis (not particularly emphasized in the drawing).
• this flexure 11 is designed in terms of its type and length in such a way that it enables angling over 90 °.
• an infusion tube can be fastened perpendicular to the arm (and thus also perpendicular to the vein) in the venous cannula 1 according to the invention. Possible movements of the infusion tube are transmitted far less to the cannula body 2 than with conventional indwelling cannulas.
• the cannula body 2 is provided with a finger plate 12 in the region of the handle attachment 3. It is particularly advantageous if, according to a further teaching of the invention, the finger plate 12 is adapted to the anatomy of the fingertip of an index finger, is arched and / or is provided with elevations 13. Slipping of the fingertip on the cannula body 2 can thus be reliably avoided.
• the above-described configuration enables the vein indwelling cannula 1 according to the invention to be handled particularly well, since it can be guided safely and yet sensitively with three fingers.
• the index finger rests on the finger plate 12 and the thumb and middle finger laterally clamp the retaining web 8 of the puncture inner cannula 6.
• indwelling vein cannulas are often provided with second accesses - for example in order to enable the cannula to be rinsed - these are generally arranged on the handle attachment of the cannula body at the level of the support wings. It is therefore expedient for the finger plate in the vein indwelling cannula designed according to the invention to simultaneously form the cover of the second access.
• the plastic cannula 4 has at least one transverse bore 14 in the region of its tip.
• the area in the dot-dash circle K from FIGS. 3 and 5 is shown enlarged in FIG. 6.
• the plastic cannula 4 according to the invention which is only shown in the area of its tip, has a transverse bore 14, but designs with several transverse bores are also conceivable.
• a uniform flow behavior is achieved by means of these transverse bores and blockages (for example due to blood clots, by contacting the tip of the cannula against the vein wall or mechanical damage to the sensitive, conically tapering tip of the cannula etc.) can be reliably ruled out.

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)
• Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6430075

Family Applications (1)

Country Status (6)

Families Citing this family (15)

Family Cites Families (7)

• 1991
  • 1991-04-22 DE DE19914113045 patent/DE4113045C1/de not_active Expired - Lifetime
• 1992
  • 1992-04-21 AU AU16487/92A patent/AU1648792A/en not_active Abandoned
  • 1992-04-21 JP JP50848392A patent/JPH05509254A/ja active Pending
  • 1992-04-21 EP EP19920909185 patent/EP0535204A1/de not_active Withdrawn
  • 1992-04-21 CA CA 2085978 patent/CA2085978A1/en not_active Abandoned
  • 1992-04-21 WO PCT/EP1992/000879 patent/WO1992018193A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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