251 results about "Hypodermic injection" patented technology

A jet injector system for injecting fluid into a body. The jet injection system includes capsules for holding the material to be injected, apparatus for applying force to the capsule(s) to eject the injection material(s) and a perforator for directing the jet stream for the respective materials into the body. A flyweight system is described for developing jet injection pressures, and latching devices control the flyweight system. An injector system for injecting more than one fluid is described.

An ice tip is placed on the front end of a hypodermic needle to cool the flesh during insertion. The ice tip front end is sharp, for penetration, and the rear is provided with a recess, for reception of a hypodermic needle front end. The mold for forming the ice tip can be cooled by a cryogenic fluid being conducted into a main mold surrounding a tip forming heat conducting mold that is used to form the ice tip pointed front end and the recessed rear end.

A hypodermic injection system with a retractable needle wherein the needle retracts within an interior cavity of a syringe plunger, such that the needle is confined within the plunger. A spring biases the needle rearwardly into the plunger, and a needle retainer releasably retains the needle against the bias of the spring. The plunger has a frangible end, which dissociates when the plunger engages the needle retainer, allowing the coiled spring to eject the needle into the interior cavity of the plunger. A body fluid sampling embodiment employs the same functional elements except the plunger is shorter and contains a linking that communicates with a vacuum container. The container allows fluid sampling and provides the structure to release the spring retracting the needle. The retractable needle embodiment is also employed with an insertion needle that guides a catheter tube below the skin of a patient and into the vein, and allows retraction of the insertion needle thereby avoiding accidental pricking of the health care worker by the insertion needle.

A catheter device is disclosed which the hypodermic needle used for insertion is retracted into a protective sheath and left in place during use. An IV fluid flow path is provided that is blocked by the hypodermic needle prior to retraction but is opened by the retraction of the needle from the catheter. The insertion hypodermic needle is not discarded separately but only after the use of the whole catheter device to inject fluids.

Anti-vacuum-lock assemblies for preventing vacuum lock when withdrawing medicinal fluid from a vial comprising a multi-finger bung-type stopper in which the fingers are of sufficient length to protect a collapsing or expanding bladder in the vial from being punctured by the hypodermic needle. In a first embodiment the vial includes one or more side or bottom wall holes to permit ambient air to enter in the space between an internal bladder containing a medicinal fluid and the inner wall of the vial. In another embodiment, an expanding bladder in communication with the exterior expands as fluid is withdrawn from the vial. In a third embodiment a fluted collar is inserted in the vial neck to provide air passages into the space between the medicinal fluid-containing bladder and the interior wall of the vial. The collapse of the medicinal bladder or expansion of the compensation bellows or bladder prevents vacuum lock.

Vacuum break vial assembly and method for reducing the incidence of nosocomial infections, comprising a vial stopper having a 2-part withdrawn-fluid volume compensation assembly having a barbed vent element that secures an apertured needle sheath, a bladder-retainer tube and an expandable / unfoldable bladder. The vial has an aluminum cap holding a plastic flip-off top that removes a central portion of the cap to permit access by hypodermic needle through the stopper into the needle sheath. No pre-pressurization of the vial by ambient contaminated air via the hypodermic can occur. Rather, the needle is inserted in the vial through the stopper and the medicinal fluid withdrawn. Air is inlet into the separate bladder which expands to permit withdrawal of fluid into the hypodermic without vacuum lock. No air having pathogen vectors is introduced into the vial medicinal fluid as the bladder isolates volume-compensating air from the medicinal fluid. Plural embodiments are shown.

An apparatus for removal of premixed drugs or reconstitution of lyophilized drugs and for the injection of the reconstituted drug into the patient. The apparatus includes a syringe assembly and an adapter assembly that can be removably connected to a medicament container containing a premixed drug or lyophilized medicament. The syringe assembly of the apparatus includes a body portion to form a liquid chamber between the forward end of the body portion and the piston and a syringe cannula assembly. The syringe cannula assembly, which can be removably interconnected with the body portion, comprises a cannula support and a hypodermic needle sealably connected to the cannula support. The adapter assembly comprises an adapter preferably molded from a moldable plastic that includes a top wall, an adapter cannula connected to and extending from the top wall and a variety of connectors connected to the top wall for removably interconnecting the adapter with the medicament container. The adapter assembly further includes syringe connector member connected to the top wall for removably interconnecting the syringe with the adapter in a manner to uniquely position the syringe cannula within the lumen of the adapter cannula wherein it is completely shielded from external contamination to prevent print damage and injury to the user.

A storage system for a needleless pen delivery device syringe and a hypodermic needle adapted for attachment to and use with the pen delivery device syringe. A tubular sleeve has a first hollow chamber for receiving therein the needleless pen delivery device syringe, and a hollow cap has a second hollow chamber for receiving therein the hypodermic needle. The cap is adapted to affix to the sleeve to form a continuous tubular housing, and the sleeve is adapted to receive the pen delivery device syringe only when the needle is not attached to the syringe. Alternative exemplary embodiments provide for storing other related accessories or additional spare needles.

A hypodermic drug delivery apparatus for delivering a pressurized medication fluid generally incorporates a reservoir containing at least one deliverable fluid, a reservoir pressurizing device, a rupturing member, a fluid administration device for communicating with the reservoir via a fluid passageway, and a rupture control mechanism for preventing rupture of a wall portion of the reservoir below a threshold pressure.

The invention relates to a nanocomposite temperature-sensitive gel and a preparation method and an application thereof. The preparation method comprises the following steps of: coating antitumor active substances with a high molecular polymer serving as a carrier material to obtain nanoparticles; and adding a temperature-sensitive high molecular material to obtain the nanocomposite temperature-sensitive gel. The preparation method disclosed by the invention is simple and convenient, is suitable for large-scale production, and is particularly suitable for preparing medicaments or diagnostic reagents having the characteristics of long cycle, biodegradability, slow release, passive targeting, active targeting, active substance conveying function and tumor resistance. An antitumor medicament prepared with the method disclosed by the invention is suitable for ways such as intravenous injection, intramuscular injection, hypodermic injection, intradermal injection, intratumor injection, tumor-side injection, oral administration or transdermal medicament delivery and the like, is applied to treatment and diagnosis of pancreatic cancer, liver cancer, lung cancer, gastric cancer, colorectal cancer, esophageal cancer, prostatic cancer, uterine cancer and ovarian cancer, and has a good application prospect.

A hypodermic injection system particularly for use in mass immunizations having a handpiece with a grasping mechanism for holding ampules filled with injectate, a plunger for driving into the ampule to discharge the injectate in an injection process, an injection spring mechanism for driving the plunger, a motor and / or manual mechanism for cocking the injection spring mechanism, and an ampule ejection mechanism for ejecting ampules after use under control of a release mechanism. Ampules can be loaded, used and ejected without contact by the user of the system or the patient being injected. Also disclosed are a filling station for filling ampules through their injection orifices, and an arming device for setting the injection spring. Ampules are disclosed having a piston which is drivable towards an orifice to discharge injectate through the orifice. Ampules are also disclosed having enlarged proximal portions for easy grasping by the grasping mechanism of the injector. Ampules are further disclosed with separators for mixing lyophilized medication and a diluent. Further disclosed are magazines for holding ampules for sequential use by the hypodermic injector. The disclosed system finds particular use as a mass immunization kit for making numerous injections in the field.