632 results about "Needle safety" patented technology

A safety syringe cylinder has a structure for attaching a syringe needle precisely. The syringe needle can be retracted into the syringe cylinder for bending. A hook seat is formed at a lower end of the needle. An annular hook groove is formed at a top end of the push rod cap. The hook seat is engaged with the annular hook groove so as to control the displacement and bending process of the syringe needle. Thereby, the processing of undesired syringe needle is safe, reliable and convenient.

A hypodermic needle assembly configured such that the movement of a needle shield into position to block the needle tip occurs as a direct consequence of a longitudinal force applied by insertion of a syringe plunger is provided. The hypodermic needle assembly according to the present invention includes a needle, a needle hub, and a safety spring clip assembly, the safety spring clip assembly being configured to automatically launch from the needle hub and slide along the needle to shield the needle tip, thus preventing accidental contact with the needle tip. Additional mechanisms for launching the safety spring clip are also provided, which include using a trigger ring for rotating and launching the safety spring clip. Methods for making and using the hypodermic needle assemblies are also disclosed.

A needle safety device for an intravenous catheter apparatus that includes a base capable of receiving a needle into opposing jaws attached to the base and capable of being influenced by the needle. The jaws move between an expanded position which interact with an obstruction within a wing housing of the intravenous catheter apparatus. The jaws permit relative movement of the needle with the base when expanded, close around a needle tip as it passes the jaws, and prevent relative movement of the needle with the base when the jaws are collapsed. The needle of the intravenous catheter apparatus may then be safely disposed with the needle tip within the needle safety device.

An infusion device (10) includes one or more of automatic insertion and retraction of an introducer needle (40) and catheter (28), introducer needle safety and extension set. The device (10) can further comprise a top-push button (16) activation feature, a side-push button (402) activation feature or a rotary-button (412) activation feature, and one or more of a manual interlock of an outer barrel and base, and a manual interlock for an extension set top and base. Packaging (500) for an integrated and/or removable inserter with activation button protection is also disclosed.

A needle assembly includes a needle and a hub mounted to each other. The hub includes a sidewall spaced outwardly from the needle cannula and extending to a distal position between the opposed ends of the needle cannula. A housing integral with the hub defines a sidewall to partially confine a safety shield. The safety shield is slidably disposed about the needle cannula and releasably retained in a proximal position and can be moved to a distal position where the safety shield completely surrounds that portion of the needle hub projecting distally from the hub. The needle assembly includes a spring for propelling the safety shield to the distal position and a latch for releasing the safety shield from the proximal position. The latch may be passively activated by normal usage of the medical implement to which the needle assembly is mounted or alternately activated manually.

The syringe includes a barrel, a plunger, and an adapter for mounting the needle in the distal end of the barrel. The adapter includes a protrusion projecting away from the needle end and into the barrel defining an annular space between the barrel and the protrusion. The plunger and protrusion have complementary surfaces whereby the plunger may grip the adapter for removal of the adapter into the interior of the barrel after use. These complementary surfaces afford initial resistance to further axial movement of the plunger toward the adapter, signalling the user that further axial pressure will permanently lock the plunger and adapter to one another whereby, upon application of full axial pressure on the plunger, the complementary surfaces of the plunger and adapter permanently lock to one another to enable joint unitary movement of the plunger and adapter together with the needle carried by the adapter into the barrel. The adapter includes vent passages communicating between the central passage through the adapter and the annular space whereby air can be vented from the barrel after receiving fluid within the barrel and prior to injection. Thus, the syringe may be oriented in a vertical position needle end uppermost with the vent passages forming the most superior portion of the barrel interior whereby air may be vented.

A needle stick safety syringe includes a outer tubular protective cover or sleeve for the inner syringe body where a concentric coil spring is compressed against the normal flange of the inner syringe body and retained there by a stop which is cantilevered from a collar affixed to the distal end of the inner syringe body. This cantilevered stop also includes a convenient button which may be easily depressed by a finger of one hand holding the outer tubular body to allow the sleeve to be slid over the needle under the bias of the spring. The cantilevered button and stop rides in a groove in the inner diameter of the tubular outer protective body and is captured by a slot which effectively prevents reuse.

A retractable safety syringe may have a ferrule and needle which are selectively removeable from a distal end of a syringe body. In particular, the ferrule may have an annular flange. A wedge element may be frictionally engaged to the ferrule and a distal end of the syringe body. To retract the needle into the syringe body, a punch of a piston displaces the wedge element off of an annular flange of the ferrule. At about the same time, longitudinally offset tabs engage an annular flange and retract the needle into the syringe body via a retraction force created by a variable vacuum compartment or tension member. Alternatively, the ferrule and needle may be temporarily fixed to the distal end of the syringe body via a detent and/or o-ring which engages a lower undercut groove and an upper undercut groove of the ferrule. An annular ring of the piston may have longitudinal offset tabs which engage an annular ring of the ferrule. Upon engagement, the retraction force of the variable vacuum compartment is sufficient to overcome any retaining forces created by the detent and/or the o-ring. Thereby, the needle and ferrule may be retracted into the syringe body. The longitudinal offset tabs may cant the needle when the needle is retracted into the syringe body.

A safety, over-the-needle midline catheter, designed generally for insertion distal to the antecubital crease to be threaded proximally to a site just distal to the axilla. An accompanying safety apparatus is employed which permits only proximal displacement of an associated needle cannula into a safety housing. The catheter has an internal lumen of constant diameter and a proximally disposed taper which in conjunction with the constant internal diameter, provides a wall thickness which effectively resists kinking and associated closure of said lumen which might result from bending of an elbow when a portion of the catheter is disposed at the cubital crease. A butterfly is disclosed which has a collet having a superiorly disposed slit and lips associated with the slit which are sufficiently thin and supple to permit the catheter to be separated from the collet (and butterfly) while wings of the butterfly are disposed upon skin of a patient. Apparatus and methods are disclosed for assisting threading the catheter through difficult anatomical pathways.

A sterilized safety syringe comprises a syringe tube, a protective cover, a sterilizer, and an air compressor. The protective cover is slid into a guide slot of the syringe tube with several sliding plates whose rear ends are closely in contact with the wall of the guide slot with their annular flanges. The syringe tube are equipped with several air conducting pipes which are connected with corresponding air feeding pipes of the air compressor. A plug is formed at the rear end of the sterilizer to be plugged into a drilled hole formed on the protective cover. Due to existence of perfectly effective sterilizer, the medical staffs never have to worry about infectant contamination brought about from inadvertent contact with the patient body fluid.

A retractable safety needle assembly is provided. The needle assembly includes a tubular outer body, a retraction assembly contained with the outer body and a biasing element for applying a retraction force therebetween. The retraction assembly includes a cannula having an intravenous puncture tip and a non-patient puncture tip at opposing ends. In a first position, the intravenous puncture tip extends from a first end of the tubular outer body. The retraction assembly is adapted for movement within the tubular outer body from the first position to a second position in which the intravenous puncture tip and the non-patient puncture tip are contained entirely within the tubular outer body and are offset from a general axis defining the outer body.

Needle-bearing medical devices are provided for fluid infusion, fluid transfusion, and inserting a guide wire. After use the needle is shielded to render the contaminated needle safe to prevent inadvertent needle sticks. The device includes a housing and a needle having a sharpened tip. A biasing element biases the needle toward a position in which the sharpened tip is shielded.

A pharmaceutical pig is used to transport a syringe containing a liquid radiopharmaceutical from a radiopharmacy to a medical facility for administration to a patient. The used syringe is sent back in the pig to the radiopharmacy for disposal. The pig includes a cap that is removably attached to a base. Shielding elements, typically formed from lead, are enclosed in the cap and the base. The pig can be used to transport a conventional syringe or a safety syringe. The pig can be used with or without an inner liner in the base. There is never an inner liner in the cap.

A needle safety apparatus is disclosed which includes an inner bearing disposed within an outer bearing. The inner bearing is moveable to extend telescopically in a first interior space defined by the outer bearing. A second interior space is defined by the inner bearing, while extendable linkage segments connect the hub to the inner bearing. A hub retains the proximal end of a needle, while the distal end of the needle extends through the second interior space. A wedging portion is movable with the inner bearing and pivots to secure the distal end of the needle within the second interior space when the distal end of the needle is retracted therethrough. A latch may be formed in the outer bearing to obstruct the first interior space and prevent the inner bearing from retracting therethrough.

A safety syringe is provided which includes a shield and a barrel mounted for reciprocating movement within the shield. The safety syringe includes a hub sized and shaped so as to be attached to the barrel and a ring rotatably mounted to the hub. The ring includes a tab that cooperates with the grooves in the interior wall of the shield for locking the barrel within the shield so as to allow for a single use of the safety syringe.

A safety syringe having a sheath advanceable into a covered position by operation of the plunger with a mechanism for securing the sheath in the covered position. A bar extends across the interior of the barrel. One or more arms depend from the sheath, engaging the plunger directly or indirectly. Depressing the plunger pushes the sheath, via the arms, into the covered position. The arms each include a first and a second tooth. As the sheath is advanced, the first tooth will encounter the bar. The leading edge of the first tooth is beveled to allow the tooth to pass over the bar. The trailing edge of the first tooth is not beveled, preventing the first tooth from being pulled back over the bar. The leading edge of the second tooth is likewise not beveled, also preventing the second tooth from passing over the bar. The first and second teeth lock the bar between them, preventing the sheath and arms from moving in either direction. Thus, the sheath will be locked in the covered position when the bar is between the teeth. Additional security is provided by locking the fully depressed plunger in the barrel. Locking the plunger in place will prevent the sheath from returning to the exposed position. Additionally, the fully depressed plunger is sized to be completely contained within the barrel, inhibiting access to the plunger and making forcible retraction of the plunger more difficult, thereby further inhibiting reuse of the syringe.

An improved arterial syringe safety vent (20) that is dually optimized for needle safety and arterial blood degassing efficiency.

A system for converting an off-the-shelf syringe into a safety syringe for preventing accidental needle stick or infection. The preferred embodiment of the present invention is configured to mount to an off-the-shelf syringe via threaded, snap, permanent, or other engagement to the cannula hub of the syringe, wherein the device may include the needle for mounting to the syringe, or via barrel rings configured to mount about the barrel of the syringe. The device is configured to convert the syringe into a safety syringe including a protective cover in longitudinal communication with the syringe needle, the protective cover configured to longitudinally envelope the base of the needle in a storage position, and engage and cap the needle tip in a protected configuration after the instrument has been utilized.

A syringe comprises a generally-cylindrical, hollow barrel with a hollow nozzle at a distal end thereof. A plunger with an open channel is slidably mounted in the barrel. A needle holder with a needle mounted at one end thereof is arranged in the plunger channel, and movable between an advanced position, whereat the needle projects from a distal end of the nozzle for injection, and a retracted position, whereat the needle is enclosed within the barrel when the injection is complete. A spring retainer is arranged in the barrel. A spring is positioned within the spring retainer, urging the needle holder toward the retracted position. A latch latches the needle holder to the spring retainer thereby maintaining the spring in compression. The latch is releasable in response to the plunger moving to its fully advanced position, whereby the needle holder is released, allowing the spring to expand and thereby move the needle holder to the retracted position.

This invention of a prepacked automatic retractable safety syringe comprises a needle hub with a needle tube and a rubber washer, a cap, a barrel, a spring, a vial, and a retractable plunger. To prevent or reduce injuries of needle stab and protect medical staffs, a forward action of the vial plus the needle hub compressed by the retractable plunger can drive a sliding movement between slides on the needle hub and snap hooks on the barrel via the spring's force to complete automatic retraction of the needle hub as well as the vial when an injection is finished.

The present invention is a safety syringe for use with a plurality of interchangeable needles. The plurality of needles may be inserted by the user into the safety syringe for use. In operations, the user selects the desired needle, e.g., a needle having a particular gauge or size or of a particular type. The user inserts the needle into a safety syringe comprising a barrel, a needle assembly area located within or attached to the barrel and a plunger. The needle couples to the syringe by a number of means. For instance, a locking mechanism may be used by which a needle hub located within the needle assembly has an area adapted to mate with a corresponding area on the needle. Or, the needle may be formed as part of a separate needle assembly, whereby the user will place the entire needle assembly onto the end of the syringe barrel. During use, the user operates the syringe, using one hand to depress the plunger, which ultimately causes a spring to propel the needle into the barrel of the syringe.