US3906946A - Indwelling vein catheter with concentric puncture needle - Google Patents

Indwelling vein catheter with concentric puncture needle Download PDF

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Publication number
US3906946A
US3906946A US440134A US44013474A US3906946A US 3906946 A US3906946 A US 3906946A US 440134 A US440134 A US 440134A US 44013474 A US44013474 A US 44013474A US 3906946 A US3906946 A US 3906946A
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US
United States
Prior art keywords
catheter
puncture needle
fitting
catheter fitting
vein
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.)
Expired - Lifetime
Application number
US440134A
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English (en)
Inventor
Cai Gustav Rabbe Nordstrom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CH Boehringer Sohn AG and Co KG
Boehringer Ingelheim GmbH
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CH Boehringer Sohn AG and Co KG
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Publication of US3906946A publication Critical patent/US3906946A/en
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Expired - Lifetime legal-status Critical Current

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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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Definitions

  • FIG.1 A first figure.
  • This invention relates to a novel indwelling vein catheter assembly structure.
  • the present invention relates to a novel indwelling vein catheter assembly with concentriepuncture needle and wing-like, laterally extending, flexible elements tangentially attached to the catheter body; these wing-like elements can be folded around the catheter body to form angularly offset gripping and guide means which assume safe and smooth insertion of the catheter into a vein, and in the unfolded position provide support and steadying means for the inserted catheter.
  • German Offenlegungsschrift No. 1,929,050 discloses a vein catheter with internal puncture needle, where the catheter is provided with a flexible wing arrangement at the end opposite to the point of the puncture needle.
  • This known wing arrangement has the purpose of not only facilitating the positioning of the catheter in the vein, but also to improve the flexibility and adhesion adjacent to the point of puncture (see pages 4 and 5). These improved effects are achieved by virtue of the fact that, after insertion of the catheter into the vein, the wings can be caused to form a kind of roof (see page 20, FIG. 8) which provides a steady support.
  • German Offenlegungsschrift No. 2,1 16,108 discloses a vein catheter with concentric internal puncture needle, where the catheter is composed of a plurality of telescoping concentric tubes having successively larger diameters; the center tube includes integral flexible flaps which extend laterally outward in substantially opposite directions, and the hollow rearward tube section envelops a unitary fitting.
  • the flaps when folded against each other, serve as auxiliary means to facilitate the introduction of the catheter into the vein; when allowed to extend apart, the flaps serve as means for fixing the position of the inserted catheter.
  • Catheters of this type have substantial disadvantages or shortcomings.
  • a vein puncture for insertion of a catheter it is always necessary to perforate the human skin.
  • the skin offers a widely varying degree of resistance to puncture, depending on age, occupation, exposure to sunlight, location of the puncture, etc.
  • the resistance which must be overcome in order to perforate the skin is often compared with the force that is necessary to perforate a thick piece of leather.
  • the catheter assembly described in German Offenlegungsschrift No. 2,116,108 does not include any means which would, under these circumstances, prevent the point of the puncture needle from being forced coaxially into the surrounding catheter during perforation of the skin. As indicated above, it is necessary to exert a considerable force in order to perforate the skin. If this force is applied to the two flaps of the catheter assembly described in the German publication in an attempt to puncture the skin and insert the catheter into a vein, the result can only be that the puncture needle is forced into the catheter wall and toward the rear, so that no puncture of the vein is possible.
  • the cone which is supposed to fix the position of the catheter with respect to the puncture needle in the device of the German publication can, moreover, not be forced into the counterpart so firmly that a vein puncture would become possible, because such a firmly seated cone can scarcely be loosened after the vein puncture has been effected without moving the very sharp point of the puncture needle then located in the vein lumen. Every movement of the needle in this phase of the procedure represents a considerable risk of injury to the wall of the vein, and an accidental perforation of the wall results in undesirable perivascular hemorrhages and at the same time makes the application of an infusion at this point more complicated.
  • Another object of the present invention is to provide an improved vein catheter assembly which substantially reduces the chances of accidental perforation of wall of the vein after introduction of the catheter.
  • THE INVENTION 1 have discovered that the above objects are achieved by changing the structure and location of the wing-like or flap elements of the prior art devices (hereinafter referred to as wings" for short), which serve as holding means for the inserted catheter and as auxiliary gripping means during insertion of the catheter.
  • wings wing-like or flap elements of the prior art devices
  • indwelling vein catheters with a concentric perforating needle can be facilitated and made safer by arranging the wings on the catheter assembly in such a way that they can be folded together around the outside of the body of the catheter assembly at the end opposite to the point of the puncture needle, so as to form gripping means for use during the perforating and insertion procedure; after the catheter has been inserted and properly seated in the vein, the wings are unfolded again and then come to be flat against the skin area adjacent to the point of puncture and thereby form support means for the catheter so as to help prevent it from moving.
  • the wings in accordance with the present invention are not arranged symmetrically with respect to a plane defined by the longitudinal axis of the puncture needle and a line passing from the eccentric point of the puncture needle parallel to the longitudinal axis to the rear thereof, but rather in such a way that, when folded together during the puncture and insertion phase, they form an angle of about 30 to 60 with the said plane.
  • This particular angle is fixed by a LuerLok closure located between the catheter fitting and the cannula carrier.
  • FIG. 1 is a cross-sectional view of the catheter assembly along a plane passing between the wings in the folded state (plane E-F in FIG. 3).
  • FIG. 2 is a rear view of the catheter assembly with the wings in the unfolded position.
  • FIG. 3 is a rear view of the catheter assembly with the wings in the folded position.
  • FIG. 4 is a partial cross-sectional top view of the catheter assembly with the flexible wings in the unfolded position and the connecting hose for the infusion device attached.
  • FIG. 5 is a perspective view of the catheter assembly.
  • FIG. 6 is a detailed view of X of FIG. 5.
  • 1 identifies the internal puncture needle
  • 2 is the catheter telescopically carried by the puncture needle
  • 3 is the catheter fitting
  • 4 is the puncture needle holder with Luer-Lok cone
  • 5 is an inclined stud for the rear closure cap
  • 6 is the closurecap
  • 7 is a fixed wing against which the flexible wings are folded
  • 8 are the flexible wing elements
  • 9 is the protective cap for the puncture needle when the device is not in use
  • 10 is the connecting hose for the infusion device
  • 12 are the connecting portions between the wing elements 8 and the body of the catheter assembly
  • 13 are the gripping portions of the wing elements 8.
  • FIG. 1 shows particularly clearly the fixed connection between the catheter and the concentric puncture needle formed by the Luer-Lok cone, as well as the angle a, (about 45) between the longitudinal axis of the catheter assembly and the inclined closure stud 5.
  • FIG. 2 shows the relative position of the two wing elements in the unfolded position, the fixed wing 7, and the closure stud 5.
  • FIG. 3 shows how the wing elements 8 are folded around the body of the catheter assembly and against the fixed wing 7 during the puncture and insertion procedure.
  • FIG. 4 also illustrates the connection between the puncture needle holder and the catheter fitting, as well as the position of the unfolded flexible wings in relation to the catheter assembly body.
  • FIG. 5 shows the plane passing through the puncture needle axis and the point of the puncture needle (identified by letters ABCD) and the angle (1 (here about 45) between said plane and the wings in the folded position. It also shows the flexible wings in the folded and unfolded positions, as well as how the wings fold around the needle holder 4. Finally, it also shows the relatively thin portion 12 and the relatively thick portion 13 of one of the wing elements.
  • FIG. 6 shows how the plane ABCD passes through the longitudinal axis of the puncture needle and also contains the line which extends from the point of the puncture needle rearwardly.
  • the catheter fitting 3 as well as the two wings 8 extending therefrom are advantageously made of flexible plastic material.
  • the wings are preferably connected with or fastened to the catheter fitting tangentially, that is, over a very small area, so as to avoid the formation of lumps and ridges at the point ofjuncture and thereby assure a smooth contact area with the skin.
  • the wings may also be fastened to the underside of the catheter fitting by means of small hinges. It is most advantageous to fashion the wings in such a way that the outer, relatively thick portions (13) thereof which form the gripping means in the folded position taper off into relatively thin portions (12) which are tangentially joined to the catheter fitting.
  • the length of the tapered thin portion may be different for each wing element, especially if the angle a is to be about 30 to and if, additionally, a rotation of the inserted catheter in the vein lumen is to be avoided.
  • the thin, tapered section for each wing should be so designed that when the thicker end portions of the wings are folded together the thin portions snugly fit around the catheter fitting.
  • the thick portion of the wings tapers offin concave fashion to follow the contour of the catheter fitting (see FIG. 5), so that when the thick portions of the wings are folded together, the thin portions form a continuous, virtually seamless surface with the outside of the needle holder 4.
  • the thin portions are tangentially joined to the underside of the catheter fitting at a point which is substantially diametrically opposite to the thick portions of the wing elements when the wing elements are symmetrically folded around opposite sides of the catheter fitting.
  • the above-described structure of the wings has the important advantage that they not only provide in the unfolded position firm support means for the inserted catheter, as in the prior art structure, but in the folded position also provide auxiliary insertion guide means which are much superior to analogous prior art structures.
  • Another advantageous embodiment of the catheter assembly pursuant to the present invention provides, in addition to the two flexible wings 8, another unilateral, rigid wing extension 7 which is preferably made of hard plastic and is rigidly attached to or made a unitary part of needle holder 41, and is inclined with respect to plane ABCD by angle a
  • the flexible wing elements are folded together in this embodiment, their outer portions l3 come to lie flat against the sides of the rigid wing extension 7, as shown in FIG. 3, so as to form gripping and guide means which can be held between the thumb and forefinger of the manipulator during the insertion procedure.
  • one hand can be used to withdraw the puncture needle by means of the rigid wing extension without changing the position of the catheter within the vein, while the other hand can be used to press the unfolded flexible wing elements against the skin of the patient.
  • the folded flexible wings and the rigid wing extension together stand at an angle of 30 to 60", preferably 45, with respect to plane ABCD during the insertion procedure, it is also advantageous to provide a solid connection between the catheter and the rear end of the puncture needle through the needle holder, for instance by means of a locking cone (Luer-Lok cone).
  • This arrangernent substantially facilitates a smooth and safe insertion of the catheter into the vein, because the two components are thereby joined into a single unit and the angle 01,, of about 45 is fixed.
  • the catheter and its flexible wings are brought into a symmetrical position with respect to the rigid wing extension (see FIGS. 2 and 3), so that the flexible wings can be folded around the catheter fitting and snugly against opposing surfaces of the rigid wing extension.
  • the rotation of the puncture needle in the locking cone after insertion of the catheter into the vein is a simple procedure and can readily precede the above-described withdrawal of the puncture needle from the catheter.
  • An indwelling vein catheter assembly comprising a catheter fitting, a catheter attached to and extending forwardly from said catheter fitting, a puncture needle holder attached to the rearward end of said catheter fitting, a puncture needle extending forwardly from said needle holder and concentrically through said catheter fitting and said catheter, and flexible, laterally extending wing elements attached to said catheter fitting, each of said wing elements comprising a relatively thick portion at the end thereof away from said catheter fitting and said relatively thick portion of said wing elements tapering off into a relatively thin portion, each of said thin portions being tangentially joined to the underside of said catheter fitting, said wing elements being adapted for symmetrically folding around opposite sides of said catheter fltting with said relatively thin portions snugly folded around said catheter fitting and with said relatively thick portions forming a gripping means for guiding said catheter assembly during insertion into a vein; said gripping means being in a plane which is at an angle of 30 to with respect to a plane defined by the longitudinal axis of the puncture needle and the point of the punct
  • An indwelling vein catheter assembly comprising a catheter fitting, a catheter attached to and extending forwardly from said catheter fitting, a puncture needle holder attached to the rearward end of said catheter fitting, a puncture needle extending forwardly from said needle holder and concentrically through said catheter fitting and said catheter, and flexible, laterally extending wing elements attached to said catheter fitting, said wing elements being adapted for folding around oppo' site sides of said catheter fitting to form gripping means for guiding said catheter assembly during insertion into a vein, said wing elements being tangentially attached to said catheter fitting and, in a symmetrically folded position about the catheter fitting, form said gripping means in a plane which is at an angle of 30 to 60 with respect to a plane defined by the longitudinal axis of the puncture needle and the point of the puncture needle, and a support means laterally extending from said puncture needle holder, whereby said wing elements will be supported by said support means during insertion.
  • An indwelling vein catheter assembly comprising a catheter fitting, a catheter attached to and extending forwardly from said catheter fitting, a puncture needle holder attached to the rearward end of said catheter fitting, a puncture needle extending forwardly from said needle holder and concentrically through said catheter fitting and said catheter, flexible, laterally extending wing elements attached to said catheter fitting, said wing elements being adapted for folding around opposite sides of said catheter fitting to form gripping means for guiding said catheter assembly during insertion into a vein, said wing elements being tangentially attached to said catheter fitting and in a symmetrically folded position about the catheter fitting, form said gripping means in a plane which is at an angle of 30 to 60 with respect to a plane defined by the longitudinal axis of the puncture needle and the point of the puncture needie, and a rigid fixed wing element laterally extending from said puncture needle holder in a plane which is at puncture needle.

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  • 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)
US440134A 1973-02-07 1974-02-05 Indwelling vein catheter with concentric puncture needle Expired - Lifetime US3906946A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2305896A DE2305896C3 (de) 1973-02-07 1973-02-07 Venenverweilkatheter mit Innennadel

Publications (1)

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US3906946A true US3906946A (en) 1975-09-23

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US (1) US3906946A (it)
JP (1) JPS5047482A (it)
DE (1) DE2305896C3 (it)
FR (1) FR2215977B1 (it)
GB (1) GB1458310A (it)
IT (1) IT1002864B (it)
SE (1) SE398712B (it)

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US4192305A (en) * 1978-08-21 1980-03-11 Abbott Laboratories Catheter placement assembly having axial and rotational alignment means
US4192306A (en) * 1978-08-21 1980-03-11 Abbott Laboratories Catheter placement assembly having axial and rotational alignment means
US4194504A (en) * 1978-10-12 1980-03-25 Abbott Laboratories Winged catheter placement assembly
US4198973A (en) * 1978-03-14 1980-04-22 Johnson & Johnson Intravenous catheter assembly with fluid flow restriction capability
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SE401785B (sv) * 1976-10-26 1978-05-29 Viggo Ab Anordning vid ett infusionskanylaggregat
JPS59135755U (ja) * 1983-03-03 1984-09-11 テルモ株式会社 カテ−テル
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Also Published As

Publication number Publication date
DE2305896A1 (de) 1974-08-15
FR2215977A1 (it) 1974-08-30
IT1002864B (it) 1976-05-20
FR2215977B1 (it) 1978-01-13
DE2305896B2 (de) 1975-04-10
DE2305896C3 (de) 1975-11-20
JPS5047482A (it) 1975-04-26
GB1458310A (en) 1976-12-15
SE398712B (sv) 1978-01-16

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