US3809081A - Obturator - Google Patents

Obturator Download PDF

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Publication number
US3809081A
US3809081A US857770A US3809081A US 3809081 A US3809081 A US 3809081A US 857770 A US857770 A US 857770A US 3809081 A US3809081 A US 3809081A
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Prior art keywords
catheter
obturator
flange
dogs
disposed
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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
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Inventor
J Loveless
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DESERET MEDICAL Inc C/O BECTON DICKINSON AND Co
DESERET PHARM CO INC US
Original Assignee
DESERET PHARMA
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0606"Over-the-needle" catheter assemblies, e.g. I.V. catheters

Abstract

A device for selectively occluding the flow of fluid through an indwelling catheter, the device having an elongated stem adapted to be interposed snugly within the catheter, a handle with opposed generally flat sides and luer coupling structure for releasibly connecting the device to the catheter.

Description

United States Patent 1191 Loveless [45] 1 May 7, 1974 OBTURATOR 3,491,756 1/1970 Bentov 1211/2144 2,896,619 7/1959 Bellamy 128/214 [75] Invent James Sandy, Utah 2,656,835 10/1953 Eisenstein 128 214 73 Assignee; Desem pharmaceutical Company 3,454,006 7/1969 Langdon 128/2l4.4 Inc. sandy Utah 3,491,757 1/1970 Arce 128/221 [22] Filed: 1970 Primary Examiner-Richard A. Gaudet [2l] Appl. No.: 8,577 Assistant Examiner-J. C. McGowan v Attorney, Agent, or Firm-Lynn G. Foster 52 us. (:1. 128/214.4, 128/348 [51 Int. Cl. A6lm 5/00, A61m 5/32 [57] ABSTRACT [58] Fleld of Search 128/ A device for selectively occluding the flow of fluid through an indwelling catheter, the device having an elongated stem adapted to be interposed snugly within [56] References cued the catheter, a handle with opposed'generally flat UNITED STATES PATENTS sides and luer coupling structure for releasibly con- 3,406,685 10/1968 May 128/221 X necting the device to the catheter. 3,352,306 12/1967 Hirsch 128/2l4.4 2,426,535 8/1947 Turkel 128/2 B 2 Claims, 8 Drawing Figures MTENTEDMAY 1 m4 SHEET 1 UF 2 -INVENTOR. 7 JAMES C. LOVELESS 4 ATTO NEY P Enm 7:914 3.809.081

SHEET 2 0F 2 FIG. 7

FIG. 8

JNVENTOR.

JAMES c. LOVE ss' ATT NEY OBTURATOR BACKGROUND 1. Field of Invention The invention relates to intravenous catheters and more particularly to a novel obturator device for selectively occluding an intravenous catheter, when desired.

2. The Prior Art The use of indwelling catheters to accomodate fluid infusion into the circulatory system of a patient is wellknown in the medical art. It has recently become desirable to place an indwelling catheter in a patients vein and allow the catheter to remain in. the vein between periods of fluid administration or, for purposes of obtaining a series of blood samples at spaced time intervals.

Heretofore, it has been common to use a plug to occlude the indwelling catheter during the. time periods when the catheter is not being used for fluid infusion or for drawing blood samples. When a plug is used, blood pressure within the circulatory system will frequently force blood into the lumen of the indwelling catheter where the blood clots. Forcible ejection of clotted blood from the indwelling catheter may be hazardous to the patient in that a dangerous embolism is easily formed. If the clotted blood cannot be ejected from the indwelling catheter, the catheter may be permanently occluded so that it is necessary to remove the occluded catheter to introduce another catheter into the circulatory system.

A conventional plug modification, known tome, adapted to prevent clotting of blood in an indwelling catheter is made of two pieces, Le. a threaded cylindrical cap and a stem bonded to the interior of the cap. The plugs of the mentioned type have proven to be disadvantageous in that it is difficult to manipulate and, when assembled with an indwellingcatheter, cannot be conveniently secured to the skin without presenting a bulky and uncomfortable obstruction adjacent the venipuncture site thereby introducing tissue trauma in the patient.

BRIEF SUMMARY OF THE INVENTION The present invention includes an improved onepiece obturator which prevents blood from entering into a dormant indwelling catheter and which is uniquely configurated so as to be easily manipulated into and out of locking relation with the catheter.

It is a primary object of the present invention to vide an improved one-piece obturator.

It is another primary object of the present invention to provide a novel obturator device which is uniquely configurated so as to lay flat against the skin in the assembled condition while at the same time avoiding use of a cumbersome coupling structure.

These and other objects and features of the present invention will become more fully apparent from the following description and appended claims taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of the presently preferred obturator embodiment with a protective cover attached;

pro-

1 2... FIG. 2 is anenlargedtop view'of the obturator of FIG. 1 disposed within a conventional indwelling catheter, the catheter being'shown in longitudinal and crosssection; I

FIG. 3 is a cross-section taken along lines 3-3 of FIG. 2;

FIG. 4 is a schematic illustration ofaplacement procedure for situating an indwelling catheter within a vein; I

FIG. 5 is a schematic illustration of the properly placed indwelling catheter with a conventional plug situated therein; and I FIGS. 6-8 schematically illustrate sequential procedural steps in properly situating the obturator of FIG. 1 within a properly located indwelling catheter.

DETAILED DESCRIPTION OF THE PREFERRED I EMBODIMENT Reference is now made to the figures wherein like parts are designated with like numerals throughout. With reference particularly to FIGS. 1-3, the obturator generally designated comprises a handle 22 which is peripherally contoured and has opposed planar faces 24. The trailing end 26 of the handle 22 is rounded and the sides 28 and 30 taper outwardly toward the leading end 32 of the handle. In the illustrated embodiment, an annular recess 34 exists in each planar face 24.

The handle 22 is provided with a channel 36 which opens at the leading end 32 of the handle and also at the planar faces 24. Channel 36 has inwardly directed shoulders 38 and 40, the shoulders 38 and 40 being spaced one from another and alsobeing spaced from the bottom of the channel 36. Each of the shoulders 38 and 40 has ramp surfaces 42 and 44 which slope in opposite directions. I I j The channel 36 and ramp surfaces 42 and 44 cooperate to form a luer lockcoupling site so that conventional luer lock dogs 60 on an indwelling catheter 50 may be connected to the handle 22 (see FIG. 2) as will be subsequently more fully described. g

A forwardly tapered male-fitting46 is centrally disposed within the channel '36 and isoriented in the plane of handle 22. An elongated shank 48 is integral with the male fitting 46 and is disposed coaxially therewith. The shank 48 may be of any suitable length, but is preferably slightly longer than the length of indwelling catheter 50 (FIG. 2.) Preferably, the shank 48 is provided initially with a protective cover 52 (FIG. 1) which is adapted to be press-fit onto themale fitting 46. Thus, during storage, the sterility of the shank 48 and male fitting 46 may be preserved. When desired, the protective cover 52 may be removed from the shank 48 and the male fitting 46 so that the obturator 20 may be inserted into and coupled to the indwelling catheter 50 as shown in FIGS. 2 and 3.

The indwelling catheter 50 is integral with a female fitting54, as is conventional, the female fitting having an annularly enlarged flange 56 at the open end 58 thereof. Preferably, the flange 56 is provided with conventional opposed luer dogs 60 (see FIG. 3) which project radially outward in opposite directions from the flange 56. Each luer dog 60 conventionally has a sloped surface 62, the sloped surface being received by the corresponding ramp surfaces 42 and 44 of the handle 22. Thus, as the female fitting S4 is telescoped over the male fitting 58, the dogs are initially oriented normal to the planar surfaces 24 until the end 58 of the flange56 meets or nearly meets the bottom of channel 36. Thereafter, the handle 22 may be rotated approximately one quarter-turn relative to the female fitting 54 so that the dogs 60 advance over the respective ramp surfaces 42 and 44 until the end 58 of the fitting 54 is pressed tightly against the bottom of the channel 36.

The method of using the obturator 20 is best understood by reference to FIGS. 4-8. As shown in FIG. 4, a stylet needle 65 is inserted within the catheter 50 and a venipuncture is made according to accepted techniques in the arm 66 of a patient. When the catheter 50 has been properly placed within a vein 68 (FIG. 5) the needle 64 is removed and, conventionally, a plug 70 is nested within the female coupling 54. If desired, a strip of tape 72 may be used to prevent inadvertent removal of the indwelling catheter 50.

According to the present invention, it is presently preferred that the plug 70 be replaced with the obturator in the manner illustrated in FIGS. 6-8. Specifically, the obturator 20 is grasped at the handle 22 and inserted into the indwelling catheter 50. The length of the shank 48 of the obturator 20 is sufficiently long so as to completely fill the catheter 50 as shown in FIG. 2. When the obturator has been inserted completely into the catheter 50 and female coupling 54 as shown in FIG. 7, the obturator is rotated about 90 relative to the female coupling 54 to the position illustrated in FIG. 8. In the HO. 8 position, the luer dogs 60 are wedged tightly upon the ramp surfaces 42 and 44 in the handle 22 (see FIG. 3) so that the obturator 20 is securely, though releasably, coupled to the indwelling catheter 50.

The obturator 20 is easily removed by rotating the handle 22 about 90 in the opposite'direction to free the luer dogs from the ramp surfaces 42 and 44. The obturator may then be axially withdrawn from the catheter tube.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of theclaims are therefore to be embraced therein.

What is claimed and desired to be secured by US. Letters Patent is:

1. In combination, a flexible catheter and a one piece obturator:

the catheter comprising a relatively long flexible cannula comprised of synthetic resinous material of essentially uniform inside and outside diameters which together define a thin wall, a female hub at the trailing end of a forwardly converging circular interior bore, an annular radial flange integral with the trailing end of the hub defining a round surface about the periphery thereof and a flat rear surface, at least two oppositely directed radially projecting dogs extending beyond though being integral with the flange, each dog defining a peripheral convex rounded surface, a rear flat transverse surface, opposed parallel side surfaces, and a front ramp surface;

the obturator disposed in said catheter and comprising a solid though yieldable rod having a uniform diameter'along the entire length thereof substantially the same as the inside diameter of the flexible cannula, the rod having a dull rounded leading tip, a forwardly facing conically tapered solid male plug integral with and disposed at the trailing end of the rod, the plug being sized and shaped to tightly fit within and seal the trailing bore ofthe catheter female hub, a thin planar handle disposed in a plane for manually gripping integral with and disposed at the trailing end of the male plug, the

flat handle having two opposed flat side surfaces I and defining at the leading end thereof a mouth, the mouth being disposed in said plane comprising a central flat wall exposed at the front of the flat handle at the back of the mouth and disposed essentially transverse of the axis of the catheter being adapted to be pressed tightly against the entirety of the flat rear face of the female hub of the catheter and opposed inwardly projecting locking dogs forming the sides of the mouth and disposed at approximately degrees to the central wall the locking dogs having opposed concave surfaces adapted to contiguously match the peripheral convex rounded surface of the flange of the female hub, each locking dog being spaced from the central flat wall by a notch each notch being comprised of a rear ramp surface sized and shaped to fully engage and frictio'nally lock with the entire front ramp surface of the dogs of the catheter hub flange, respectively, with the locking dog concave surfaces fully contiguous with the convex surfaces of the flange and said concave and convex surfaces substantially concealed by the dogs with the flange, respective dogs and surfaces sized and shaped such that the catheter flange and obturator handle present a continuous unobstructed edge within said plane following insertion of the obturator within and partial rotation of the obturator relative to the catheter whereby the cannula, following venipuncture, is sealed, the hollow of the cannula is occupied by the rod to prevent clogging and the like, and the combination is left flatly on the arm of the patient without obstructions projecting therefrom.

2. An obturator for use with a catheter having a female fitting with a flange and radial dogs, the fitting being secured to the proximal end of the catheter, said obturator comprising:

an elongated shaft dimensioned to be telescopically received within said catheter and extendable completely through said catheter,

a male tapered projection disposed about said shaft adjacent the proximal end thereof dimensioned for frictional engagement within said female fitting to close the fitting against intravenous leakage,

a flat, planar tab having a forward central edge thereof secured to the proximal end of said male projection and generally extending laterally and rearwardly from said male projection,

a pair of radially disposed opposed shoulder members comprising said tab the shoulders extending vforward of the site where the projection and tab are secured to each other, each shoulder having an interior radial concave surface to match the flange of the female fitting, each shoulder being in spaced relation with but circumscribing said male projection in part, and

a stepped notchinterposed between each shoulder and said forward central edge, each notch having s a 6 a ramp surface projecting radially toward the shaft contiguous relation the radial dogs of the female in a plane diagonal of the axis of the shaft, the ramp fittings essentially concealing the radial dogs within surface being formed on the inwardly extending the stepped notches.

portions of said shoulder members to engage in

Claims (2)

1. In combination, a flexible catheter and a one piece obturator: the catheter comprising a relatively long flexible cannula comprised of synthetic resinous material of essentially uniform inside and outside diameters which together define a thin wall, a female hub at the trailing end of a forwardly converging circular interior bore, an annular radial flange integral with the trailing end of the hub defining a round surface about the periphery thereof and a flat rear surface, at least two oppositely directed radially projecting dogs extending beyond though being integral with the flange, each dog defining a peripheral convex rounded surface, a rear flat transverse surface, opposed parallel side surfaces, and a front ramp surface; the obturator disposed in said catheter and comprising a solid though yieldable rod having a uniform diameter along the entire length thereof substantially the same as the inside diameter of the flexible cannula, the rod having a dull rounded leading tip, a forwardly facing conically tapered solid male plug integral with and disposed at the trailing end of the rod, the plug being sized and shaped to tightly fit within and seal the trailing bore of the catheter female hub, a thin planar handle disposed in a plane for manually gripping integral with and disposed at the trailing end of the male plug, the flat handle having two opposed flat side surfaces and defining at the leading end thereof a mouth, the mouth being disposed in said plane comprising a central flat wall exposed at the front of the flat handle at the back of the mouth and disposed essentially transverse of the axis of the catheter being adapted to be pressed tightly against the entirety of the flat rear face of the female hub of the catheter and opposed inwardly projecting locking dogs forming the sides of the mouth and disposed at approximately 90 degrees to the central wall the locking dogs having opposed concave surfaces adapted to contiguously match the peripheral convex rounded surface of the flange of the female hub, each locking dog being spaced from the central flat wall by a notch each notch being comprised of a rear ramp surface sized and shaped to fully engage and frictionally lock with the entire front ramp surface of the dogs of the catheter hub flange, respectively, with the locking dog concave surfaces fully contiguous with the convex suRfaces of the flange and said concave and convex surfaces substantially concealed by the dogs with the flange, respective dogs and surfaces sized and shaped such that the catheter flange and obturator handle present a continuous unobstructed edge within said plane following insertion of the obturator within and partial rotation of the obturator relative to the catheter whereby the cannula, following venipuncture, is sealed, the hollow of the cannula is occupied by the rod to prevent clogging and the like, and the combination is left flatly on the arm of the patient without obstructions projecting therefrom.
2. An obturator for use with a catheter having a female fitting with a flange and radial dogs, the fitting being secured to the proximal end of the catheter, said obturator comprising: an elongated shaft dimensioned to be telescopically received within said catheter and extendable completely through said catheter, a male tapered projection disposed about said shaft adjacent the proximal end thereof dimensioned for frictional engagement within said female fitting to close the fitting against intravenous leakage, a flat, planar tab having a forward central edge thereof secured to the proximal end of said male projection and generally extending laterally and rearwardly from said male projection, a pair of radially disposed opposed shoulder members comprising said tab the shoulders extending forward of the site where the projection and tab are secured to each other, each shoulder having an interior radial concave surface to match the flange of the female fitting, each shoulder being in spaced relation with but circumscribing said male projection in part, and a stepped notch interposed between each shoulder and said forward central edge, each notch having a ramp surface projecting radially toward the shaft in a plane diagonal of the axis of the shaft, the ramp surface being formed on the inwardly extending portions of said shoulder members to engage in contiguous relation the radial dogs of the female fittings essentially concealing the radial dogs within the stepped notches.
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052989A (en) * 1975-10-30 1977-10-11 Medical Evaluation Devices And Instruments Corporation Needle catheter
FR2368968A1 (en) * 1976-10-26 1978-05-26 Viggo Ab Cannula for infusion
FR2371204A1 (en) * 1976-11-22 1978-06-16 Travenol Laboratories The cap device to catheter
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
US4230123A (en) * 1978-10-31 1980-10-28 Hawkins Jr Irvin F Needle sheath complex and process for decompression and biopsy
US4326516A (en) * 1980-01-02 1982-04-27 Schultz Kenneth E Intracatheter-intravenous tubing lock
US4422460A (en) * 1982-04-08 1983-12-27 Cordis Corporation Positionable locating and orienting wing for a pacing lead
US4610671A (en) * 1985-03-28 1986-09-09 Luther Medical Products, Inc. Assembly of stylet and catheter
US4798591A (en) * 1985-12-18 1989-01-17 Sherwood Medical Company Catheter obturator
WO1989002757A1 (en) * 1987-09-28 1989-04-06 Bio-Plexus, Inc. Self-blunting needle assembly and device including the same
US4946443A (en) * 1987-10-27 1990-08-07 Cordis Corporation Catheter introducer
US4964854A (en) * 1989-01-23 1990-10-23 Luther Medical Products, Inc. Intravascular catheter assembly incorporating needle tip shielding cap
FR2655550A1 (en) * 1989-12-08 1991-06-14 Inoteb Surgical drainage device with delayed action
EP0548612A1 (en) * 1991-12-20 1993-06-30 Becton Dickinson and Company One-piece injection molded needle bore occlusion device
US5360406A (en) * 1992-11-19 1994-11-01 Minnesota Mining And Manufacturing Company Stylet for retrograde coronary sinus cannula
US5683370A (en) * 1996-06-06 1997-11-04 Luther Medical Products, Inc. Hard tip over-the-needle catheter and method of manufacturing the same
US5743882A (en) * 1996-03-08 1998-04-28 Luther Medical Products, Inc. Needle blunting assembly for use with intravascular introducers
US5817060A (en) * 1996-03-08 1998-10-06 Luther Medical Products, Inc. Unidirectional blunting apparatus for hypodermic needles
US5951520A (en) * 1996-12-19 1999-09-14 Bio-Plexus, Inc. Self-blunting needle medical devices and methods of manufacture thereof
US6358265B1 (en) 2000-07-18 2002-03-19 Specialized Health Products, Inc. Single-step disposable safety lancet apparatus and methods
US20030023208A1 (en) * 2001-07-24 2003-01-30 Osypka Thomas P. Apparatus for vascular access
US20030060803A1 (en) * 2001-09-21 2003-03-27 Mcglinch Timothy Intravascular device with carrier tube engagement member
US20030125713A1 (en) * 2001-09-21 2003-07-03 Mcglinch Timothy Intravascular device and carrier tube with interference fit member
US6629956B1 (en) 1997-03-26 2003-10-07 John M. Polidoro Parenteral fluid transfer apparatus
US20060015006A1 (en) * 2004-06-01 2006-01-19 Laurence Bernard H System and method for accessing a body cavity
US20070010738A1 (en) * 2004-10-14 2007-01-11 Mark Joseph L Surgical site marker delivery system
US20080027387A1 (en) * 2005-10-31 2008-01-31 Andreas Grabinsky Cleveland round tip (CRT) needle
US20080287877A1 (en) * 2007-05-18 2008-11-20 Tyco Healthcare Group Lp Flexible Cannula With Associated Seal
US20090054895A1 (en) * 2007-08-17 2009-02-26 Wilson-Cook Medical Inc. Device to open and close a bodily wall
US20100160777A1 (en) * 2008-12-22 2010-06-24 Hardin Terry D Reverse deployment device
US20180161546A1 (en) * 2016-12-12 2018-06-14 National Guard Health Affairs Intravenous catheter stopper

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US2896619A (en) * 1954-10-14 1959-07-28 Fenwal Lab Inc Apparatus for handling fluid blood
US3352306A (en) * 1963-12-23 1967-11-14 Hrisch Sidney Intravenous catheter assembly
US3406685A (en) * 1963-07-23 1968-10-22 Becton Dickinson Co Catheter needle and method for its manufacture
US3454006A (en) * 1966-01-28 1969-07-08 Weck & Co Inc Edward Intravenous catheter-needle assembly provided with needle bushing guide
US3491756A (en) * 1966-12-12 1970-01-27 Itzhak E Bentov Apparatus and method for preventing blood clotting
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US2426535A (en) * 1944-10-21 1947-08-26 Turkel Henry Infusion and biopsy needle
US2656835A (en) * 1952-02-01 1953-10-27 Eisenstein Edward Intravenous attachment
US2896619A (en) * 1954-10-14 1959-07-28 Fenwal Lab Inc Apparatus for handling fluid blood
US3406685A (en) * 1963-07-23 1968-10-22 Becton Dickinson Co Catheter needle and method for its manufacture
US3352306A (en) * 1963-12-23 1967-11-14 Hrisch Sidney Intravenous catheter assembly
US3454006A (en) * 1966-01-28 1969-07-08 Weck & Co Inc Edward Intravenous catheter-needle assembly provided with needle bushing guide
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Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052989A (en) * 1975-10-30 1977-10-11 Medical Evaluation Devices And Instruments Corporation Needle catheter
FR2368968A1 (en) * 1976-10-26 1978-05-26 Viggo Ab Cannula for infusion
FR2371204A1 (en) * 1976-11-22 1978-06-16 Travenol Laboratories The cap device to catheter
US4137916A (en) * 1976-11-22 1979-02-06 Travenol Laboratories, Inc. Catheter plug assembly
US4192306A (en) * 1978-08-21 1980-03-11 Abbott Laboratories Catheter placement assembly having axial and rotational alignment means
US4192305A (en) * 1978-08-21 1980-03-11 Abbott Laboratories Catheter placement assembly having axial and rotational alignment means
US4230123A (en) * 1978-10-31 1980-10-28 Hawkins Jr Irvin F Needle sheath complex and process for decompression and biopsy
US4326516A (en) * 1980-01-02 1982-04-27 Schultz Kenneth E Intracatheter-intravenous tubing lock
US4422460A (en) * 1982-04-08 1983-12-27 Cordis Corporation Positionable locating and orienting wing for a pacing lead
US4610671A (en) * 1985-03-28 1986-09-09 Luther Medical Products, Inc. Assembly of stylet and catheter
US4798591A (en) * 1985-12-18 1989-01-17 Sherwood Medical Company Catheter obturator
WO1989002757A1 (en) * 1987-09-28 1989-04-06 Bio-Plexus, Inc. Self-blunting needle assembly and device including the same
US4828547A (en) * 1987-09-28 1989-05-09 Bio-Plexus, Inc. Self-blunting needle assembly and device including the same
US4946443A (en) * 1987-10-27 1990-08-07 Cordis Corporation Catheter introducer
US4964854A (en) * 1989-01-23 1990-10-23 Luther Medical Products, Inc. Intravascular catheter assembly incorporating needle tip shielding cap
FR2655550A1 (en) * 1989-12-08 1991-06-14 Inoteb Surgical drainage device with delayed action
EP0548612A1 (en) * 1991-12-20 1993-06-30 Becton Dickinson and Company One-piece injection molded needle bore occlusion device
US5360406A (en) * 1992-11-19 1994-11-01 Minnesota Mining And Manufacturing Company Stylet for retrograde coronary sinus cannula
US5401244A (en) * 1992-11-19 1995-03-28 Minnesota Mining And Manufacturing Company Method of, and stylet apparatus for, installing a retrograde coronary cannula
US6106499A (en) * 1996-03-08 2000-08-22 Luther Medical Products, Inc. Unidirectional blunting apparatus for hypodermic needles
US5743882A (en) * 1996-03-08 1998-04-28 Luther Medical Products, Inc. Needle blunting assembly for use with intravascular introducers
US5817060A (en) * 1996-03-08 1998-10-06 Luther Medical Products, Inc. Unidirectional blunting apparatus for hypodermic needles
US5913848A (en) * 1996-06-06 1999-06-22 Luther Medical Products, Inc. Hard tip over-the-needle catheter and method of manufacturing the same
US5683370A (en) * 1996-06-06 1997-11-04 Luther Medical Products, Inc. Hard tip over-the-needle catheter and method of manufacturing the same
US5957893A (en) * 1996-06-06 1999-09-28 Becton Dickinson & Co. Hard tip over-the needle catheter and method of manufacturing the same
US5916208A (en) * 1996-06-06 1999-06-29 Luther Medical Products, Inc. Hard tip over-the-needle catheter and method of manufacturing the same
US6254574B1 (en) 1996-12-19 2001-07-03 Bio-Plexus, Inc. Self-blunting needle medical devices and methods of manufacture thereof
US5951520A (en) * 1996-12-19 1999-09-14 Bio-Plexus, Inc. Self-blunting needle medical devices and methods of manufacture thereof
US6629956B1 (en) 1997-03-26 2003-10-07 John M. Polidoro Parenteral fluid transfer apparatus
US20030220619A1 (en) * 1997-03-26 2003-11-27 Polidoro John M. Parenteral fluid transfer apparatus
US6358265B1 (en) 2000-07-18 2002-03-19 Specialized Health Products, Inc. Single-step disposable safety lancet apparatus and methods
US20030023208A1 (en) * 2001-07-24 2003-01-30 Osypka Thomas P. Apparatus for vascular access
US7625365B2 (en) * 2001-09-21 2009-12-01 Boston Scientific Scimed, Inc. Intravascular device and carrier tube with interference fit member
US20030125713A1 (en) * 2001-09-21 2003-07-03 Mcglinch Timothy Intravascular device and carrier tube with interference fit member
US7214220B2 (en) 2001-09-21 2007-05-08 Boston Scientific Scimed, Inc. Intravascular device with carrier tube engagement member
US20030060803A1 (en) * 2001-09-21 2003-03-27 Mcglinch Timothy Intravascular device with carrier tube engagement member
US20060015006A1 (en) * 2004-06-01 2006-01-19 Laurence Bernard H System and method for accessing a body cavity
US8475476B2 (en) 2004-06-01 2013-07-02 Cook Medical Technologies Llc System and method for accessing a body cavity
US20070010738A1 (en) * 2004-10-14 2007-01-11 Mark Joseph L Surgical site marker delivery system
US20070016017A1 (en) * 2004-10-14 2007-01-18 Mark Joseph L Surgical site marker delivery system
US20080027387A1 (en) * 2005-10-31 2008-01-31 Andreas Grabinsky Cleveland round tip (CRT) needle
US20080287877A1 (en) * 2007-05-18 2008-11-20 Tyco Healthcare Group Lp Flexible Cannula With Associated Seal
US8282604B2 (en) 2007-05-18 2012-10-09 Tyco Healthcare Group Lp Flexible cannula with associated seal
US20090054895A1 (en) * 2007-08-17 2009-02-26 Wilson-Cook Medical Inc. Device to open and close a bodily wall
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