459 results about "Safety syringe" 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 pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.

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 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 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 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.

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 invention provides a safety syringe, which has a cylinder (11), a syringe needle (21), a needle holder (31) associated to the cylinder and adapted to hold the syringe needle, and a plunger (41) associated to the cylinder (11), wherein the plunger (41) comprises a piston (42) and serves to inject a filling of the cylinder (11) via the syringe needle (21), and wherein the plunger (41) can be coupled with the needle holder (31) arranged in the region of a front hole (12) of the cylinder (11), to retract the needle holder (31) together with syringe needle (21) into the cylinder (11) by pulling the plunger (41) once coupled to the needle holder (31) is retracted into the cylinder by rotating the plunger (41) and pulling the plunger (41) aft thereby pulling the needle holder (31) into the cylinder (11). Then the aft end of the plunger (41) is broken off, and a removable cap (49) from the aft end of the plunger (41) may be placed over the opening in the forward end of the cylinder (11).

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.

A barrel adapter mountable to a syringe barrel includes a barrel tip, a biasing member, a locking mechanism, and a needle assembly. A safety syringe includes a barrel, a plunger assembly, and a barrel adapter. The needle assembly includes a needle, a needle hub, and a needle seal. The needle is configured to pass-through the needle assembly, locking mechanism, biasing member, and barrel tip such that, at one end the needle is within the barrel and at another end the needle passes through an aperture in the barrel tip. The barrel may be substantially cylindrical, having along its longitudinal axis a distal end for drug injection, a proximal end for injection control, and at least a portion of the barrel interior for drug containment. The barrel adapter provides needle retraction mechanisms to the barrel to form a safety syringe. Methods of assembling, manufacturing, and using such syringes are also provided.

A safety syringe 10 includes a generally tubular body 14 having a needle end 18 and plunger end 22, needle 38 and retractable needle seat 30, two-way valve 36, plunger 42, stopper 62, piston 52, and rear plunger seal 44. During use, the plunger may be moved to create a vacuum in the plunger. The user then moves the plunger toward the needle end, pressurizing a vial, then pulls backward to a selected position corresponding to the desired volume of fluid to be withdrawn. At the conclusion of the injection stroke, the piston is disengaged from the plunger. The vacuum within the plunger retracts the needle safely into the tubular body.

A safety syringe includes a flexible holder-supporting seat that is sleeved around and that clamps a needle holder within a front end portion of a syringe barrel. A flexible sealing member seals an open front end of a plunger so as to define a vacuuming chamber in the plunger. When the plunger moves within the barrel to a front limit position, a holder-retaining front portion of the sealing member engages and retains the needle holder thereon. The plunger pushes the holder-supporting seat to separate from the needle holder such that the sealing member and the needle holder mover rearward within the syringe barrel due to negative pressure produced in the plunger, thereby retracting a needle into the syringe barrel.

In a safety syringe in which a needle and needle holder can be withdrawn into a barrel after use, the needle holder is provided with an insert having forwardly and inwardly extending resilient fingers that are cammed outward by an enlarged head formed on a projection of the plunger of the syringe, and engage a proximally facing surface on the head to connect the needle holder positively to the plunger so that the needle holder can be withdrawn into the barrel of the syringe.

There is provided a syringe assembly comprising a first, self contained cylindrical storage means (211) containing a first substance (212) and a second, self contained, cylindrical storage means (213) containing a second substance (214). The second storage means is slidably received by the first storage means and is adapted to pierce a slidable sealing element of the first storage means for mixing of the first and second substances in the first storage means. Axially driving the sealing element of the first storage means effects ejection of the resulting mixed substance from the syringe for delivery to a patient. There is also disclosed a syringe assembly with a safety sheath for covering a needle of the syringe when in an extended position and which is slidable from the extended position to a retracted position to expose the needle for use.

A barrel adapter mountable to a syringe barrel includes a barrel tip, a biasing member, a locking mechanism, and a needle assembly. A safety syringe includes a barrel, a plunger assembly, and a barrel adapter. The needle assembly includes a needle, a needle hub, and a needle seal. The needle is configured to pass-through the needle assembly, locking mechanism, biasing member, and barrel tip such that, at one end the needle is within the barrel and at another end the needle passes through an aperture in the barrel tip. The barrel may be substantially cylindrical, having along its longitudinal axis a distal end for drug injection, a proximal end for injection control, and at least a portion of the barrel interior for drug containment. The barrel adapter provides needle retraction mechanisms to the barrel to form a safety syringe. Methods of assembling, manufacturing, and using such syringes are also provided.

A syringe includes in one embodiment a fluid cartridge including a rear sliding member; a syringe barrel; a hypodermic needle assembly releasably secured to the syringe barrel; a nut member releasably secured to the syringe barrel; and a plunger including a rear handle, a front member disposed through the nut member to urge against a rear end of the sliding member, and an arm interconnected the handle and the front member. In response to dispensing fluid disengage the syringe barrel with the hypodermic needle assembly so as to separate the syringe into first and second portions, and wherein the first portion consists of the hypodermic needle assembly and the fluid cartridge and is adapted to discard, and the second portion consists of the nut, the plunger, and the syringe barrel and is adapted to sterilize for a next use.

A safety syringe assembly includes an elongated, generally cylindrical barrel having a hollow interior forming a hollow nozzle located at a distal end of the barrel and opening into the interior of the barrel. A plunger is slidably mounted in the barrel and has a longitudinal open channel. A needle holder mounts a needle at a distal end thereof and is slidably mounted in the longitudinal open channel of the plunger for movement between an advanced position in which the needle on the distal end of the needle holder projects from a distal end of the nozzle, and a retracted position in which the needle is retracted within the barrel. A compression spring is mounted inside of the barrel, and a spring retainer element has a spring support portion extending from the interiorly of the barrel to a portion for mounted within the barrel and supporting a distal end portion of the spring against expansion. The spring urges the needle holder toward its retracted position. A latch has a closed position in which the needle holder is latched relative to the barrel to hold the needle holder in its advanced position against the urging of the spring, and an open position in which the needle holder is unlatched relative to the barrel to allow the spring to expand in a proximal direction to move the needle holder to its retracted position.

A retractable needle hypodermic syringe includes a retractable needle assembly comprising a needle seat for supporting a hypodermic needle, and a generally tubular which comprises the barrel and serves as a reservoir for injectable or withdrawn fluid. The barrel is open at both ends to receive a plunger at the plunger end and a needle at the opposite end. A hollow plunger is slidably mounted within the barrel and extends from the plunger end for engagement by the user. A seal is provided between the plunger and barrel to prevent air from passing into or out of the barrel around the plunger and through the plunger end. A piston is slidably mounted within in the plunger such that movement of the plunger into the fill position locks the piston in place. A seal between the piston and the interior of the plunger prevents air or fluid from passing by the piston into the plunger. As the plunger is depressed to inject the fluid the plunger moves axially in the barrel while the piston is stationary. The relative axial movement of the plunger in relation to the piston causes a vacuum to be created within the plunger. The relatively smaller cross section of the plunger as compared to the barrel produces a corresponding greater vacuum force. The plunger in the fully depressed position releases the needle carrier from the end of the barrel and the vacuum pulls the needle carrier and needle into the hollow plunger.

A safety syringe for dispensing anesthetic is provided. After a dispensing operation pulling a plunger rearward will retract a needle assembly into a syringe barrel until a projection on a surface of the plunger moves from a forward end of an L-shaped slot to a rear square opening by passing under a stop for locking the projection in the square opening. The syringe is thus disposable and thereby prevents the used syringe from being used again by sterilizing the syringe.

A safety syringe includes a plunger for moving a rubber stopper in a barrel to force the medicine out of a needle assembly into the patient's body that has a connector at the front side of a shank thereof to hold a metal hook for hooking the needle assembly so that the needle assembly can be pulled backwards and received inside the barrel after the service of the safety syringe. The invention relates also automatic fabrication of the plunger through a syringe plunger processing system that comprises a metal hook dispenser for dispensing metal hooks, a connector dispenser for dispensing connectors, a high-frequency heat-sealing apparatus for bonding each metal hook to one respective connector, and an injection molding apparatus for molding a shank on each combination of metal hook and connector.

Methods, apparatuses, and systems are disclosed for reducing Medical Administered Errors, (MAE) in the administration of injectable medications to patients by using a syringe device that is designed, labeled, and calibrated to decrease the risk of such errors. The syringe may be designed for a specific medication, and labeled to indicate the name of the medication for which it was designed. The syringe is calibrated to deliver a specific amount of the medication that is the appropriate dosage for a patient of a particular weight or other feature, thereby making it unnecessary for the user to perform calculations to determine the correct dosage volume for the particular patient. The syringe may also be calibrated with additional measurement scales that enable the user to verify that the correct dosage.

The invention pertains to safety syringes and safety catheters designed to protect the operator from unintentional needle sticks and prevent fluid leakage after use. When the safety syringe is in operation, a plunger with an attached piston is pushed into the cylindrical bore forcing fluid through the hollow body, the outlet portion, and out of the hollow needle. A needle shield fits slidably over the needle and a portion of the hollow body. The needle shield is a membrane sealed body. The needle shield's first position permits the needle's tip to extend outward from the shield through the membrane. When in the second position, the needle shield to extends beyond the needle's tip preventing any fluid loss. When the safety catheter is in operation, fluid passes from the flexible tubing through the hollow body, outlet portion, and out of the hollow needle. The hollow body includes a pair of wings to attach to the patient's skin. A needle shield fits slidably over the needle and a portion of the hollow body and includes a slot accommodating the attachable wings. The needle shield is a membrane sealed body. The shield includes an internal membrane sealing against fluid loss through the wing slots. The needle shield's first position permits the needle's tip to extend outward from the shield through a membrane. When in the second position, the needle shield extends beyond the needle's tip preventing any fluid loss.

A small volume safety syringe is provided herein. A rigid shell or syringe body of the small volume safety syringe may define an exterior surface. A writing surface which is sufficiently large and flat for a medical professional to write medically pertinent information on the writing surface may be formed on the exterior surface of the small volume safety syringe. Moreover, a white pigment may be disposed on the writing surface so as to make the written information more visible and readable.