359 results about "Needle Free Injection" patented technology

Method and surgical instrument for treating prostate tissue including a surgical instrument having a main body, a needle deployment port, a needle, first and second handles and a lockout release mechanism to limit needle extension. Additionally, a kit includes the surgical instrument, together with a cystoscope, and optionally a syringe and reservoir of ethanol. The method includes needle-less injection and visualizing the ethanol injection by delivering both an echogenic agent and ethanol either by needle or needle-less injection or by providing an ultrasonically visible marker near the tip of the ethanol delivery cannula. The method also includes extending the needle transversely of the instrument housing using a link assembly.

A needle-less injector device for delivering a dose of fluid intradermally, subcutaneously or intramuscularly to an animal or human. The device includes an inner housing having opposed ends. A syringe is disposed in one end of the inner housing. The syringe includes a nozzle for delivering a dose of fluid held within the syringe. A plunger is movably disposed within the syringe. A spring powered hammer is movably disposed within the inner housing. The hammer cooperates with the plunger to drive the dose of medicament from the nozzle. An injection delivery spring for powering the hammer is positioned and compressed between the other end of the inner housing and the spring powered hammer. An outer housing slideably supports the inner housing. A skin tensioning spring is mounted between the inner housing and the outer housing, the skin tensioning spring biasing the nozzle of the syringe against the animal or human. A trigger mechanism is disposed in the outer housing, the trigger mechanism cooperating with the spring powered hammer to release the injection delivery spring, wherein the size of the injection delivery spring and the length of the hammer dictate the amount of dose delivered and whether the dose is delivered intradermally, subcutaneously or intramuscularly to an animal or human.

The present invention provides a micromachined or microsized component-based needleless injector for delivering a dose of a liquid formulation containing a biologically active agent to tissue by way of a high pressure liquid microstream that penetrates the skin and deposits the agent at an optimal depth in the tissue. The device is appropriate for subcutaneous, intramuscular, or mucosal injection sites, as well as intracellular injection. Embodiments include micromachined or microsized components such as valves, jets, and MEMS pumps. Some embodiments of the invention are modular, with interchangeable parts, other embodiments are integrated in a unitary design. Embodiments with a unitary design are typically single use, however modular features also create embodiments with components that provide multiple instances of use.

The present invention discloses a medical injector and medicament loading system for use therewith. The medicament loading system includes cap for a medicament cartridge. The cap has a post for causing movement of the cartridge stopper toward the seal when the cap engages the medicament cartridge to thereby eliminate adhesion between the medicament chamber and the stopper. The medical injector according to the present invention includes the medicament loading system, i.e., a cartridge assembly, a needle free syringe assembly, and a power pack assembly.

An actuator is provided which is adapted, in conjunction with a cartridge, to form a needle-less injector, the cartridge being filled with a liquid to be injected in a subject, and having a liquid outlet and a free piston in contact with the liquid. The actuator comprises an impact member urged by a spring and temporarily restrained by a latch, the impact member being movable in a first direction under the force of the spring to first strike the free piston and then to continue to move the piston in the first direction to expel a dose of liquid through the liquid outlet, the spring providing a built-in energy store. A pressure pad surrounds the said liquid outlet and, in use, bears on the subject's skin. The actuator may be formed of two main housing components urged apart by an integral cantilever spring formed on one of them, a safety catch can be provided to prevent inadvertent actuation.

Medical devices and methods for delivering therapeutic fluids transcutaneously to a body of a patient via a fluid delivery device and an adapter is provided. A Luer slip connector is provided at a first connecting end of the adapter. A therapeutic fluid container is connected with the second connecting end such that the container's neck is received in the second connecting end and a hollow penetrating member provided in the adapter punctures the septum of the container to admit the therapeutic fluid into a needle-less syringe from the container. After, fluid emerges from the tip of the penetrating member, the second connecting end of the adapter is attached to the fluid delivery device, thereby filling the reservoir with the fluid and pushing the syringe plunger forward to inject fluid into reservoir.

A device and method for delivering and injecting fluid into heart tissue utilizing high pressure injection to increase injectate (fluid) retention in the heart tissue. The catheter includes a shaft having an infusion lumen extending therethrough, wherein the proximal end of the shaft connected to a pressurized fluid source capable of generating a transient pressure of more than 1000 psi. The distal end of the shaft includes a nozzle having an injection port in fluid communication with the infusion lumen such that fluid from the pressurized fluid source may be delivered to the heart tissue at a sufficiently high exit velocity to partially penetrate the heart tissue.

This invention provides a female medical coupling port with an integrated port guide to enable more accurate and precise coupling of a male port coupling (such as the cannula of a syringe) and to prevent port exposure to non-sterile objects. The male and female ports can be arranged according to standard dimensions for male and female luer taper fittings recognized by ANSI and by ISO. This guide-shielded port is usable with the standard ANSI and ISO male cannula widely used in the medical field. In an embodiment the female port is used in medical fluid systems to receive a blunt male cannula, such as those found in the luer lock fitting of needle-less syringes and IV tubing systems to establish a mechanical coupling. Female ports allow coupling of devices (e.g. syringes and IV tubing) to a variety of medical applications including stopcocks, minimum fluid displacement medical couplings, female-to-female adapters, port dead-end caps, IV extension sets, pressure-monitoring devices, etc. The port guide can be constructed as a unitary part of the port, or can be a retrofittable structure that is either snapped into place on, for example, a female port stem, or slid onto a port, such as a minimum displacement fluid coupling. Appropriate drain ports can be provided in the port guide to prevent capture of excess fluid.

A needle-free transdermal transport device includes a chamber (900) for holding the substance to be injected, a nozzle (910) in fluid communication with the chamber, and a drug reservoir (950) for storing the substance to he transferred to the chamber. The needle-free transdermal transport device also includes a controllable magnet and coil electromagnetic actuator (242) in communication with the chamber. The actuator receives an electrical input and generates in response a force. The force then causes a needle-free transfer of the substance from the chamber to the biological body. The force is variable responsive to variations in the received input during actuation. The actuator draws the substance from the drug reservoir or alternatively, the substance can be pressurized from the drug reservoir into the chamber by a pressure source.

A needleless syringe for subcutaneously delivering a therapeutic agent comprising a generally constant diameter elongate tubular nozzle and an inert gas reservoir thereto is described herein. The reservoir is advantageously mounted to the upstream end of the tubular nozzle through a contraction that is either gradual or sudden and wherein a membrane is positioned between the reservoir and the therapeutic agent.