EP0099360A1 - Soupape de securite de prevention de l'embolie gazeuse ou de l'hemorragie - Google Patents

Soupape de securite de prevention de l'embolie gazeuse ou de l'hemorragie

Info

Publication number
EP0099360A1
EP0099360A1 EP19820900865 EP82900865A EP0099360A1 EP 0099360 A1 EP0099360 A1 EP 0099360A1 EP 19820900865 EP19820900865 EP 19820900865 EP 82900865 A EP82900865 A EP 82900865A EP 0099360 A1 EP0099360 A1 EP 0099360A1
Authority
EP
European Patent Office
Prior art keywords
valve
chamber
piston
flow
opening
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.)
Withdrawn
Application number
EP19820900865
Other languages
German (de)
English (en)
Inventor
Marvin Gordon
Joseph Lichtenstein
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.)
Whitman Medical Corp
Original Assignee
Whitman Medical Corp
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 Whitman Medical Corp filed Critical Whitman Medical Corp
Publication of EP0099360A1 publication Critical patent/EP0099360A1/fr
Withdrawn legal-status Critical Current

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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof

Definitions

  • the present invention relates to a valving app ⁇ aratus and method employed in a catheter arrangement to prevent entry of air into a patient's circulatory sys ⁇ tem and to prevent uncontrolled hemorrhaging.
  • the bias force for effecting closure in a safety valve is provided by an elastomeric material which also serves the function of diffusing or blocking sudden fluid flow through the valve chamber around the normal valving mechanism.
  • the valve includes a piston arranged to reciprocate 'longitudinally in the valve chamber while opposite ends of the piston- project into inlet and out ⁇ let openings of the chamber.
  • a flange in the form of a flat disc, surrounds the piston and extends radially therefrom in the chamber.
  • the elastomeric material likewise surrounds the piston and fills the valve cham ⁇ ber on one side on the flange, the material being arranged to bias the piston -toward the inlet end of the chamber.
  • the piston is hollow and has an open inlet end, a closed outlet end, and outlet slots defined through the cylindrical wall of the piston proximate the outlet end. When biased fully toward the inlet end, the piston is disposed such that the outlet slots are blocked with respect to the valve outlet.
  • a male adaptor of a catheter tube is forced into the valve inlet end where it is held by frictional engagement. In this position, the tube adaptor is inserted into the open end of the piston and pushes the piston toward the outlet end of the valve chamber against the opposing force of the elastomeric material which is thereby com ⁇ pressed. This pushes the piston outlet slots to a pos ⁇ ition wherein they are no longer blocked and permits fluid to pass through the valve from the catheter tube via the piston interior.
  • the resilience of the elastomeric material acts on the flange to force the piston back toward the inlet end of the chamber into a position wherein the outlet slots are blocked.
  • the elastomeric material is a of a type which
  • SUBSTITUTE SHEET blocks or severely restricts flow of fluids there ⁇ through so that sudden air flow into the patient's vascular system by air trapped in the chamber around the outside of the piston is prevented.
  • Figure 1 is a plan view in section of a prefer ⁇ red embodiment of the present invention illustrating the valve in a closed position
  • Figure 2 Is a view similar to that of Figure 1, but illustrating the valve in an open position.
  • the valve 10 of the present invention includes an inlet section 11 and an outlet section 12 separated by a valve chamber 13.
  • Inlet section 11 includes a generally conical portion 14 which tapers or narrows towards valve chamber 13.
  • Conical portion 14 terminates in an annular wall 15 which defines an inlet opening to valve chamber 13-
  • An 0-ring I ⁇ or the like is disposed in a suitably provided annular notch in wall 15-
  • Inlet section 11 Is arranged to receive and frictionally en ⁇ gage a male adaptor " 30 of a catheter tube in a tight fit engagement.
  • Outlet section 12 includes an annular wall 17 which defines the outlet opening from chamber 13.
  • OM O-ring or the like is disposed within a suitably pro ⁇ vided annular notch in wall 17-
  • the portion of outlet section 12 downstream of wall 17 tapers in a generally conical manner to a diameter suitable for connection to a catheter tube by means of Luer lock 19 or the like.
  • Valve chamber 13 is generally cylindrical in the illustrated embodiment, but this configuration is by no means a limiting factor of the invention.
  • the chamber inlet opening, defined by wall 15, and the chamber out- let opening, defined by wall 17, are generally aligned and sized to permit a piston 20 to slide longitudinally therethrough.
  • Piston 20 has an open inlet end 21 and a closed outlet end 22.
  • a plurality of outlet slots 23 are defined through the piston wall proximate outlet end 22 so as to define a flow path from open Inlet end 21 through the piston interior, and out through slots 23.
  • the outer periphery of piston 20 is sized to provide a pressure seal contact with each of O-ring l ⁇ , 18 while permitting- the piston to freely slide within those 0-rings.
  • valve chamber 13 The region of valve chamber 13 between disc 24 and outlet opening 17 is filled with an elastomeric material 25 which surrounds piston 24.
  • Theoutlet end 22 is disposed such that outlet slots 23 are blocked from communica ⁇ tion with outlet- section 12 by outlet wall 17 and O-ring 18.
  • Material 25 must be able to perform this biasing function while serving to block, or at least severely restrict, the flow of liquids and gases through the chamber, even in the closed position of the valve (Fig. 1) wherein the material is expanded.
  • Elastomeric materials of this nature are quite well known, examples of such comprising cellular or non-cellular material or synthetic rubbers or plastics, such as highly dense or closed cellular polyurethane, styrene butadenes, iso- prenes, and the like.
  • valve outlet section 12 In valve outlet section 12 so that fluid being administered can flow from adaptor 30 through piston 20 and out through outlet section 12 to the attached catheter tube. This is the open position of the valve.
  • the resilient material precludes air trapped in the valve from flowing around the piston to the out- • let section.
  • the valve positively precludes air embolism.
  • the valve precludes uncontrolled hemorrhaging by virtue of the same main valve path safety closure and the blockage or restriction provided by material 25-
  • the valve not only is the valve useful for central venous catheterization to provide parenteral nutrition, but it is also useful as a diagnostic gate to permit multiple blood withdrawals from an artery or vein without fear of uncontrolled hemorrhaging.
  • the valve as described has no obstructions in the- main valve path which would collect residual blood clotting or block intravenous fluid.
  • the size of disc-like flange 24 should be as large as possible to provide as large a possible surface over which the bias force of material 25 can act.
  • flange 24 should be as thin as possible with ⁇ out sacrificing rigidity, so that the mass of the piston
  • O-rlngs l ⁇ , 18 may be dispensed with If the material used for piston 20 and walls 15, 17, and the sizes of the piston and these walls are selected to provide the necessary fluid sealing while permitting sufficient- freedom for the piston to slide in these walls.
  • Teflon may be a suitable mat ⁇ erial for walls 15 and 17-

Landscapes

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

Abstract

Une soupape de sécurité (10) pour des procédés de cathétérisme se caractérise par un piston (20) ayant un chemin d'écoulement interne, une partie du piston (20) étant entourée par un organe élastomère (25) qui le sollicite vers une position fermée. L'organe élastomère (25) restreint fortement l'écoulement de fluide autour du piston (20) pour éliminer tout chemin d'écoulement autre que le chemin d'écoulement interne du piston (20).
EP19820900865 1982-01-28 1982-01-28 Soupape de securite de prevention de l'embolie gazeuse ou de l'hemorragie Withdrawn EP0099360A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/000137 WO1983002559A1 (fr) 1982-01-28 1982-01-28 Soupape de securite de prevention de l'embolie gazeuse ou de l'hemorragie

Publications (1)

Publication Number Publication Date
EP0099360A1 true EP0099360A1 (fr) 1984-02-01

Family

ID=22167798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820900865 Withdrawn EP0099360A1 (fr) 1982-01-28 1982-01-28 Soupape de securite de prevention de l'embolie gazeuse ou de l'hemorragie

Country Status (3)

Country Link
EP (1) EP0099360A1 (fr)
AU (1) AU8207982A (fr)
WO (1) WO1983002559A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202031B (en) * 1987-03-09 1991-11-13 Lin Shinq Juh Gas flow control assembly
US6883778B1 (en) 1996-11-18 2005-04-26 Nypro Inc. Apparatus for reducing fluid drawback through a medical valve
KR100629810B1 (ko) * 1999-01-27 2006-09-29 나이프로 인크. 의학용 밸브를 통과하는 유체의 역류를 감소시키는 장치
WO2002034326A2 (fr) 2000-10-23 2002-05-02 Nypro, Inc. Valve medicale anti-refoulement
JP2005500142A (ja) 2001-08-22 2005-01-06 ナイプロ・インク 拡張部材を備える医療用弁
US6869426B2 (en) 2001-11-13 2005-03-22 Nypro Inc. Anti-drawback medical valve
US7837658B2 (en) 2001-11-13 2010-11-23 Nypro Inc. Anti-drawback medical valve
US7357792B2 (en) 2002-10-29 2008-04-15 Nypro Inc. Positive push medical valve with internal seal
US7914502B2 (en) 2003-07-31 2011-03-29 Nypro Inc. Anti-drawback medical valve
US7879012B2 (en) 2006-04-11 2011-02-01 Nypro Inc. Medical valve with resilient sealing member
ES2696987T3 (es) 2009-06-22 2019-01-21 Np Medical Inc Válvula médica con sellado de contrapresión mejorado
US9138572B2 (en) 2010-06-24 2015-09-22 Np Medical Inc. Medical valve with fluid volume alteration

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693801A (en) * 1951-01-08 1954-11-09 Forcman Joseph Safety cutoff valve for liquid administering apparatus
US3087492A (en) * 1960-12-29 1963-04-30 May L Chester Valved catheters
US3105511A (en) * 1961-08-10 1963-10-01 Cordis Corp Infusion safety valve
US3399677A (en) * 1966-07-01 1968-09-03 Goodrich Co B F Catheter and valve therefor
GB1192986A (en) * 1967-08-31 1970-05-28 Eschmann Bros & Walsh Ltd Intravenous Valve Assembly
US3538950A (en) * 1969-04-16 1970-11-10 Locking Devices Inc Quick connect lugged coupling
US3923065A (en) * 1974-09-09 1975-12-02 Jerome Nozick Embolectomy catheter
US3965910A (en) * 1975-04-28 1976-06-29 Walpak Company Urinary irrigation valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8302559A1 *

Also Published As

Publication number Publication date
WO1983002559A1 (fr) 1983-08-04
AU8207982A (en) 1983-08-12

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Legal Events

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Effective date: 19831229

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Inventor name: GORDON, MARVIN

Inventor name: LICHTENSTEIN, JOSEPH