578 results about "Needle penetration" patented technology

An elongated access port has a needle-impenetrable housing enclosing a fluid reservoir. The housing includes a base having a floor with an upstanding encircling sidewall and a cap having a top wall with a depending encircling skirt. The skirt of the cap receives the sidewall of the base. An access aperture extends through the top wall of the cap to communicate with the fluid reservoir. The access aperture is encircled by a continuous rim having an elongated shape in the plane of the access aperture. The rim of the access aperture may be elliptical, oval, polygonal, or parabolic-ended. An elastomeric, needle-penetrable, generally planar septum is disposed in the access aperture with the periphery of the septum in sealing engagement with the rim of the access aperture. Prior to installation, the septum has a periphery with a cross section in the plane of the septum that is geometrically proportional to and larger than the shape of the access aperture. Installation causes the periphery of the septum to be displaced inwardly by the rim of the access aperture in a direction parallel to the plane of the septum. In view of the relative shapes of the rim of the access aperture and the periphery of the septum, this produces substantially uniform hydrostatic pressure in regions of the installed septum that are subjected in use of the access port to needle penetrations. Opposite faces of the periphery of the septum are urged toward each other between the cap of the housing and the top of the sidewall of the base of the housing.

Methods, devices, and systems are described herein that allow for improved sampling of tissue from remote sites in the body. A tissue sampling device comprises a handle allowing single hand operation. In one variation the tissue sampling device includes a blood vessel scanning means and tissue coring means to excise a histology sample from a target site free of blood vessels. The sampling device also includes an adjustable stop to control the depth of a needle penetration. The sampling device may be used through a working channel of a bronchoscope.

The present invention provides a biopsy instrument with improved needle penetration for piercing dense tissue. The device may comprise a needle slidably retained in a housing. The device may further comprise an actuation member that may be adapted to communicate longitudinal motion to the needle in a first direction. The device may further include a propulsion element that provides the needle with return motion in a second direction. The device may be fired multiple times to create repeating reciprocal motion. In one version, the device may reciprocate several times as a result of a single engagement of the actuation member.

An injector is automatic in that the needle insertion into the injection site (e.g., a patient's skin) is triggered by the user or caregiver, the insertion is automatic, the following delivery is automatically initiated upon needle insertion, and the needle is shielded automatically after the end of delivery. Preferably the user does not see the needle prior to, during, or after injection. The injector includes a proximal and distal housings and a needle shield arranged to slide on the distal housing. The injector has a driver arranged to move the syringe to cause the needle penetration, to inject the drug, and subsequently to release the shield. The syringe needle is shielded and the shield locked automatically after delivery is completed. The patient does not experience any injector force on the tissue during injection. The injector has built in patient safety features.

Medical devices are delineated that may include a needle, a catheter and a sheath. Such devices may be used to take a biopsy from a patient and/or inject fluid into a patient, particularly in the patient's heart tissue. One or more ports may be located between the ends of the needle to facilitate the desired medical procedure. A relative motion restrictor may be included to restrict relative movement during needle deployment between the catheter and the sheath. Additionally, a driver may be employed to deploy the needle with one or more of a predefined force, acceleration and velocity to ease needle penetration.

This disclosure provides for olefin wax oligomer compositions, methods of producing olefin wax oligomer composition, and methods for oligomerizing olefin waxes. This disclosure encompasses metallocene-based olefin wax oligomerization catalyst systems, including those that include a metallocene and an aluminoxane, a metallocene and a solid oxide chemically-treated with an electron withdrawing anion, and a metallocene, a solid oxide chemically-treated with an electron withdrawing anion, and an organoaluminum compound. The olefin wax oligomers prepared with these catalyst systems can decreased needle penetrations, increased viscosity, and an increased drop melt, making them useful as an additive in candles, stone polishes, liquid polishes, and mold release formulations.

A method and apparatus for administering a pharmaceutical. The method employs a delivery device including a housing, a pharmaceutical containing needled syringe movable within the housing, an activation button disposed at one of the housing, and wherein the housing is flared radially outward at the other end and designed to allow visibility of the needled syringe. A skin-contacting surface of the housing at the flared end is designed to limit slippage along the skin, and at least one injection targeting guide is provided. When the device is sited for injection, and without pressing the delivery device housing toward the injection site with any predetermined force by the one hand holding the housing, the activation button may be plunged with the other hand toward the housing to trigger an advancing assembly within the device that first automatically advances the needled syringe to insert a needle into the injection site, and that second automatically advances the syringe piston to force pharmaceutical through the inserted needle.

Asphalt compositions and products in which the binder comprises tall oil materials possibly previously subjected to distillation, and/or oxidation, and/or combined with a polymer, the tall oil materials having a softening point in the range of 75 F to 400 F, a Needle Penetration value (0.1 mm) at 25 C of at least 1, a Rotational Viscosity at 275 F in the range of 650 cps to 8,000 cps, and a water solubility of less than 10 percent.

A medical diagnostic instrument for the ergonomic effective and safe harvesting of specimen at targeted remote tissue sites includes a pistol grip style handle with a hand activated lever and a specialized elongated flexible double tube needle shaft inside of a protective sheath for use, in a preferred embodiment, within an endoscope. The length of needle shaft is adjusted using locking buttons. Moving another set of buttons sets the needle penetration depth. With a squeeze of the lever, a novel thin band drive mechanism advances the needle shaft out of its sheath, through adjacent tissue and into the targeted site. The double tube needle shaft incorporates a pointed distal tip attached to an innermost “grater” needle, which has sharp edged tissue cutting holes or “grating” features that are exposed by retracting back an overlying cover tube. Sliding back the cover tube is achieved via a cam. The sharp cutting surfaces of the grater tube communicate directly with a vacuum source attached near the handle. Oscillation of the vacuum augmented grater tube back and forth within the targeted tissue yields small pieces of tissue for harvest. When adequate amounts of tissue are drawn into the grater tube, the cover tube is re-advanced over the distal grater tube, the needle shaft is retracted back into the sheath and the instrument along with the harvested specimen are removed from the patient.

A safety enclosure which is designed for a hypodermic needle that is located in the shape of an approximate right angle (Huber needle). A safety enclosure has a needle housing within which the Huber needle is mounted. The needle housing is mounted in conjunction with a panel unit. The panel unit is composed of a series of planar panels which are edge connected together defining an enclosed area. The panel unit can be movable from a basically transverse position to an elongated position. When in the transverse position, the panel unit is to be mounted with adhesive tape onto the skin of a patient with the sharp end of the needle being inserted within the body of the patient. When the panel unit is in the elongated position, the needle is withdrawn from the body of the patient and the sharpened end of the needle is covered by the panels thereby preventing undesired needlestick injury to the medical practitioner that is installing and removing the enclosure.

A system for detecting tissue contact and penetration depth. The system comprises a needle sheath having a needle sheath inner diameter and a needle sheath outer diameter. A first conductive region is disposed on the needle sheath inner diameter. A needle having a needle insulation layer on the outer diameter upon which a second conductive region is disposed within the first conductive region. A dielectric layer is disposed between the first conductive tube and the second conductive tube. A capacitance sensor is coupled to the first conductive region and the second conductive region.

An electrical cable with a stranded central conductor encircled by insulation including a material which provides self-sealing properties to the cable present at least between the adjacent edges of the stranded conductor and the insulation. Preferably, the material is a polymeric material which is flowable at a temperature at least as low as 25° C. and has a 100 gram needle penetration value greater than 100 tenths of a millimeter at 25° C.