Abstract: A protective cap is provided for a hypodermic syringe. The protective cap is hingedly connected to the distal end of the hypodermic syringe for rotation relative thereto. In a first rotational orientation the protective cap sealingly engages a passageway extending through the distal end of the hypodermic syringe. In a second rotational orientation the protective cap enables complete access to the passageway extending through the distal end of the hypodermic syringe and into the chamber. The protective cap can be separately mounted to the hypodermic syringe or unitarily formed therewith. Preferably, the protective cap is configured to enable easy one-handed and opening and closure by a health care worker.
Abstract: A syringe assembly includes a substantially cylindrical syringe barrel and a plunger assembly. The plunger assembly includes a distally disposed flow channelizer and a proximally disposed stopper releasably engaged with one another. The stopper includes an aperture engageable with the distal end of a plunger rod. The flow channelizer includes flutes for accommodating an outflow of vapor during lyophilization and to enable efficient mixing of a lyophilized medication and a diluent. Liquid medication in the syringe chamber is lyophilized and a vacuum is applied to the syringe barrel. The plunger assembly then is urged distally into sealing engagement with the syringe barrel. A plunger rod is engaged with the stopper, and is moved proximally to simultaneously separate the stopper from the flow channelizer and to draw diluent into the chamber for reconstituting the previously lyophilized medication.
Abstract: A needle stopper for use with a hypodermic syringe such as an arterial blood gas syringe includes a shell having a bottom, an open top and a needle-receiving chamber therebetween. The bottom is configured to support the needle stopper in an upright orientation. The needle-receiving chamber is dimensioned to receive needle cannula and to engage a needle hub connected to the cannula. The chamber is at least partly filled with a sealing material that can occlude the tip of a needle cannula. The upright orientation of the needle stopper enables one-handed insertion of the needle cannula into the needle-receiving chamber for occluding the needle tip. Engagement of the needle stopper with the needle hub enables safe and convenient separation of the needle hub and cannula from the syringe barrel for disposal. The tip of the syringe barrel then may be capped and sent to a laboratory for analysis of fluids therein.
Abstract: A needle assembly having a single-handedly activatable needle barrier includes a needle cannula having a proximal end, a distal end and a lumen therethrough connected to a needle hub having an interior cavity in fluid communication with the needle cannula. A guide element is connected to the needle hub and includes an aperture therethrough. An elongate barrier arm having a proximal end and a distal end is provided. The distal end of the barrier arm includes a barrier element having a needle passageway therethrough. The barrier arm is positioned within the aperture of the guide element and the needle cannula is positioned at least partially within the needle passageway of the barrier element.
June 20, 1994
Date of Patent:
November 14, 1995
Becton, Dickinson and Company
Peter Bressler, Niall Sweeney, Daniel Hicswa, James A. Burns
Abstract: A method of delivering a blood sample to an evacuated receptacle having a pierceable stopper and a cavity at a subatmospheric pressure, comprising the steps of:a) providing a syringe comprising a barrel having an open proximal end, a distal end and a chamber for retaining fluid, a needle cannula having a sharp distal end and a lumen therethrough connected to the distal end, a safety shield having an open distal end and a cap having an aperture removably connected thereto, the shield slidably mounted over the barrel for telescoping movement from a proximal position where the needle cannula projects through the aperture to a distal position where the shield protectively surrounds the needle cannula, a piston inside the barrel connected to a rigid elongate plunger rod;b) piercing a blood vessel with the needle and drawing blood from the vessel into the chamber by manipulating the plunger rod,c) withdrawing the needle from the vessel;d) moving the shield to the distal needle protecting position;e) removing the ca
Abstract: A safety needle assembly is provided for locking a hypodermic syringe to a fitting of an intravenous set. The assembly includes a shield with a needle cannula mounted therein. A latch is pivotably mounted to the needle shield for rotation about an axis extending generally orthogonal to the needle cannula. The latch includes a locking flange having a slot for engagement with the fitting of the intravenous set. The latch can be lockingly engaged into a position for securely retaining the safety needle assembly to the fitting, and includes a resiliently deflectable finger for urging the latch into a fully opened condition in response to disengagement of the lock.
Abstract: A safety shield is provided for an elongate needle cannula having a proximal end and a sharply pointed distal tip. The safety shield includes an anchor fixedly disposed near the proximal end of the needle cannula. The safety shield further includes a tip guard that is slidably movable along the needle cannula from a proximal position near the anchor to a distal position where the tip guard protectively surrounds the distal tip of the needle cannula. An elongate spring tether formed from a resiliently deflectable material has a proximal end connected to the anchor and a distal end connected to the tip guard. The spring tether is deflected into a loop about an axis extending orthogonal to the needle cannula when the tip guard is in the proximal position. The spring tether has a length which permits the tip guard to slide into its distal position without sliding completely of the distal end of the needle cannula. Resiliency of the spring tether keeps the tip guard in its proximal position.
Abstract: A lockable safety shield is provided for a hypodermic syringe. The safety shield is mounted over the syringe barrel and can be telescoped into a position for protectively guarding a sharp point on the needle cannula. Oppositely facing stop surfaces on the syringe barrel and the safety shield prevent complete telescoped removal of the safety shield from the syringe barrel. A deflectable wall on the syringe barrel snaps into engagement with locking teeth on the safety shield when the safety shield has been telescoped into a position for guarding the needle cannula point to prevent exposure of the used needle cannula.
Abstract: A vial access pin includes opposed proximal and distal ends. The proximal end of the vial access pin is configured for mounting to a hypodermic syringe. The distal end of the vial access pin defines a cannula. The cannula includes a sharp point for piercing an elastomeric seal of a vial. A lumen extends through the cannula and communicates with the proximal end of the pin. A fluid flow aperture extends through the cannula at a location spaced from the distal end. The aperture enables a vial to be substantially drained without repositioning the cannula relative to the vial. An ampule access tube can be mounted over the cannula to cover the aperture and enable fluid in an ampule to be accessed.
Abstract: A safety shield is provided for a medical implement having a needle cannula. The safety shield includes a guard that is slidably movable along the needle cannula from a proximal position where the tip of the needle cannula is exposed to a distal position where the tip of the needle cannula is safety shielded. A hinged arm connects the guard to a hub of the needle cannula or to the medical implement with which the needle cannula is used. The hinged arm can be collapsed upon itself, such that the guard is adjacent the hub of the needle cannula. Alternatively, the hinged arm can be extended to cause the guard to move distally along the needle cannula and into a position for shielding the tip of the needle cannula. A spring may be provided to assist movement of the guard toward the distal shielded position.
November 24, 1993
Date of Patent:
September 20, 1994
Becton, Dickinson and Company
Niall Sweeney, Peter W. Bressler, Richard J. Caizza
Abstract: A safety shield assembly is provided for safely enclosing a needle cannula. The safety shield assembly includes an inner shield that is slidably movable along the needle cannula. The inner shield includes a locking structure which locks the inner shield with respect to the distal end of the needle cannula. The safety shield assembly also includes an outer shield that is in releasable engagement with the inner shield. The outer shield will separate from the inner shield in response to excessive force exerted thereon, and hence avoids failure of the structure locking the inner shield to the needle cannula.
Abstract: A syringe assembly having a non-reusable needle shield includes an elongate barrel having a chamber for retaining fluid, an open proximal end and a closed distal end. A tip extends from the distal end and includes a passageway therethrough in fluid communication with the chamber. A needle cannula extends distally from the tip. The cannula includes a lumen therethrough in fluid communication with the passageway. An elongate hollow needle shield having a longitudinal axis, a distal end and an open proximal end is positioned on the barrel tip so that the tip extends into the open proximal end of the shield and the shield covers the needle cannula. The needle shield is divided along the longitudinal axis into a plurality of separate needle shield segments. Frangible structure is provided for releasably holding the needle shield segments together and preventing removal of the needle shield from the syringe assembly.
Abstract: A hypodermic syringe has a syringe barrel with opposed proximal and distal ends and a fluid-receiving chamber therebetween. A tip at the distal end has a passage communicating with the fluid-receiving chamber. A needle hub is mounted to the tip and has a needle cannula mounted thereto. The needle hub includes a stop flange projecting radially outwardly therefrom and a locking wall projecting distally. A safety shield is mounted over the syringe barrel for telescoped movement from a proximal position where the needle cannula is exposed to a distal position where the needle cannula is protectively surrounded. Stop blocks on the safety shield engage the stop flange of the needle hub to prevent complete telescoped removal of the safety shield. Locking teeth on the safety shield engage with the locking wall on the needle hub to prevent proximal movement of the safety shield.
Abstract: A safety needle device includes a barrel having an inside surface defining a chamber and an open proximal end. A distal end includes a needle cannula attached thereto. The needle cannula includes a distal tip and a lumen therethrough in fluid communication with the chamber. A needle guard is mounted on the barrel for movement relative to the barrel from a retracted position in which the needle guard does not materially obstruct access to the distal tip of the needle cannula and an extended position in which the needle guard obstructs access to the distal tip. The safety needle device includes structure for releasably retaining the needle guard in the retracted position and for locking the needle guard in the extended position.
Abstract: A method for testing the accuracy of a medication delivery device, such as a medication delivery pen, includes the steps of:a) providing a syringe assembly having a hollow barrel with volume measuring indicia on the barrel, a slidable stopper in the barrel and a needle cannula at the distal end of the barrel;b) providing a medication delivery pen having a pierceable septum at its distal end, a reservoir for containing liquid adjacent to the septum, a movable plunger for dispensing liquid from the reservoir projecting from the proximal end of the pen and dose setting apparatus for manually selecting the volume of liquid to be delivered by action of the plunger;c) manually activating the dose setting apparatus to select the volume of liquid to be delivered from the pen;d) piercing the septum of the pen with the needle cannula of the syringe;e) activating the plunger to dispense the selected volume of liquid from the reservoir through the needle into the syringe barrel chamber so that as liquid enters the chambe
Abstract: A syringe having structure to isolate fluid from the distal end of the syringe includes a barrel with a chamber therein. A stopper is slidingly disposed in the chamber and is provided with an aperture extending axially therethrough. A plug includes a head releasably engaged in a sealing portion of the aperture of the stopper. A rigid tail extends distally from the head and through the aperture in the stopper and projects outwardly from the distal end of the stopper. The tail is long enough so that it can be used to move the head out of the sealing portion of the aperture by applying force to the distal end of the tail. The tail has a cross-sectional shape which defines at least one fluid channel between the tail and the sealing portion of the stopper to allow fluid to flow from the chamber through the aperture in the stopper and out of the distal end of the barrel.
Abstract: Apparatus and method are provided for containing blood flashback during insertion of a guide wire into a blood vessel. The apparatus includes a barrel having a flashback chamber. An inner cannula in the flashback chamber communicates with an inserter needle mounted on the barrel. The inner cannula includes an aperture communicating with the flashback chamber. A porous vent plug is slidably disposed in the chamber in fluid-tight engagement with both the barrel and the inner cannula. The vent plug can be slid from a proximal position where the aperture in the inner cannula is exposed to a distal position where the aperture in the inner cannula is blocked. A guide wire in the inner cannula blocks blood flow. The vent plug and the guide wire are retained proximally of the aperture in the inner cannula until blood flashback is observed. The vent plug is then axially advanced to cover the aperture and stop further blood flow. The guide wire can then be advanced safely into the blood vessel.
February 5, 1993
Date of Patent:
March 22, 1994
Becton, Dickinson and Company
Mary B. Clinton, Frederick C. Houghton, Joseph J. Gregg
Abstract: An injection device is provided for injecting fluids such as insulin within body tissue. The device includes a housing, a piston rod movably mounted within the housing, and a dose setting mechanism for controlling the movement of the piston rod with respect to a fluid containing cartridge removably positioned within the housing. The dose setting mechanism includes a units counter ring and a tens counter ring. A transmission key is provided for selectively coupling the units and tens counter rings so that they rotate together only during selected portions of the dose setting procedure. The piston rod includes a plunger and a lead screw slidably positioned within the plunger. The plunger and lead screw are coupled by a pair of half nuts. The half nuts may be uncoupled from the lead screw in order to allow it to slide freely with respect to the plunger. A new cartridge may accordingly be installed quickly and easily as the lead screw is easily displaced by a new cartridge.