97 results about "Needle catheter" patented technology

A catheter device having an elongated tubular member with a proximal end and a distal end, and a needle disposed near the distal end. In one embodiment, the needle has a rigid, penetrating tip coupled to a flexible portion by an overlapping joint. The flexible portion enables the needle to bend to a penetrating angle relative to the distal end of the elongated tubular member and penetrate a body tissue without kinking.

A universal passive protector for an IV catheter is provided. The protector comprises an over-the-needle catheter including a proximal hub. The hub is secured within a hub trap comprising first and second interlocking arms. The hub trap is secured to a distal end of a tubular sheath. A slider is disposed about the sheath, and connected to a proximal end of the needle through a slit in the sheath. When the slider is in a distal position, the needle maintains the arms in a closed configuration wherein the hub is secured to the hub trap. When the slider is moved to a proximal position, the needle moves to a proximal position wherein the needle no longer maintains the arms in a closed position. The arms snap to an open position, releasing the hub and trapping the sharp distal tip of the needle within the sheath. Medical technicians are thus protected against accidental needle sticks.

A catheter insertion device is provided for inserting an over-the-needle catheter. The device includes an insertion needle that is retractable into the housing of the device after use to prevent exposure to the contaminated needle. A needle retainer releasably retains the needle in an extended position against the rearward bias of the biasing element. The needle retainer engages the hub of the catheter so that when the catheter is removed from the insertion device, the needle retainer automatically releases the needle. The biasing element then propels the needle rearwardly into the housing of the device. The device further allows the operator to intervene to delay retraction if desired.

An echogenic medical device, such as a needle catheter, which produces an improved ultrasonic image of the device, and a method of performing a medical procedure using a device of the invention. One aspect is directed to a catheter which reduces artifacts in the ultrasound image of the catheter. In one embodiment, the catheter has a spherical distal tip. Another aspect of the invention is directed to an echogenic catheter with echogenic portions arranged in an array to facilitate determination by ultrasonic imaging of the rotational orientation of the catheter relative to a desired location within the patient.

An echogenic catheter, such as a needle catheter, formed at least in part of an intrinsically conductive organic polymer for providing a highly conductive surface in combination with an improved ability to ultrasonically image the catheter, and a method of performing a medical procedure using a catheter of the invention.

A method for one-piece injection molding of a soft needle catheter having a hub and a tube-shaped flexible part. According to the method, a molten polymer is fed into a mold which includes a core that is used to form the interior of the catheter, the core defining a hub cavity and a tube-shaped cavity. The hub cavity includes a cone-shaped part and a cylindrical part, with the cone-shaped part extending into the tube-shaped cavity. When the polymer is sufficiently cured, the core is removed from the catheter and the catheter is removed from the mold.

Embodiments of the present invention relate to multiple needle catheter-based injection systems to deliver a plug of a therapeutic or other agent. A medical device may include a catheter with a distal end, a proximal end and a catheter lumen extending there between and an outer needle disposed in the catheter lumen with a distal end and a proximal end and an outer needle lumen extending there between. The medical device may include an inner needle with a distal end and a proximal end, the inner needle being disposed in the outer needle lumen and the distal end of the inner needle to receive and hold a therapeutic plug, and a needle control mechanism coupled to the proximal ends of the outer needle and the inner needle, the needle control mechanism to independently and jointly control ejection and retraction of the outer and inner needles to deliver the therapeutic plug into a target tissue site.

The invention belongs to the technical field of medical devices, and discloses an arterial remaining needle capable of displaying arterial pulsation. The arterial remaining needle comprises a stainless steel needle, a remaining needle, a pressure measuring catheter and a steel wire inner core, wherein the stainless steel needle comprises a needle body and a needle seat; a guide device is installed on the needle seat; the needle body is hollow; a hollow cavity is formed in the needle seat; the steel wire inner core enters the stainless steel needle through the guide device of the needle seat; the wall side of the needle body is provided with a blood return groove; the remaining needle consists of a remaining needle catheter, a catheter seat located on the tail end of the remaining needle catheter and a check valve placed in the catheter seat; the catheter seat is connected with the needle seat in a sheathing way; the catheter seat is hollow, and is provided with a side tube communicated with the catheter seat; the side tube is connected with the pressure measuring catheter; the check valve is located above the side tube; the blood return groove is located in an inner cavity formed by the catheter seat and the check valve; a hemostatic clamp is arranged on the pressure measuring catheter. According to the arterial remaining needle, the structure is simple; the use is convenient; the success rate of arteriopuncture cathetering can be effectively improved; the pollution caused by blood overflow is avoided; moreover, the pain and the economical burden of a patient are reduced.

An over-the-needle catheter having a curvilinear slit formed therein to allow for infusion of fluids through the catheter and into the blood vessel of the patient in the event of blockage of the primary opening of the catheter.

The invention discloses a security-type venous indwelling needle. The security-type venous indwelling needle comprises an indwelling needle catheter assembly, a needle tubing assembly and a solution infusion joint assembly, and is characterized in that the catheter assembly comprises an indwelling needle catheter and a catheter base connected behind the indwelling needle catheter; the needle tubing assembly comprises a notch needle tubing and a needle bed, wherein the front part of the notch needle tubing is provided with a side notch, a notch steel needle is inserted in a catheter and the catheter base; the tail part is provided with the needle bed which is exposed out of the catheter base; a plastic joint matched with the inner wall of the catheter base is arranged between the rear part of the catheter base and the needle bed; a needle tip protective stainless steel elastic sheet with a back hook is arranged in the plastic joint; the notch steel needle runs through the needle tip protective stainless steel elastic sheet and the plastic joint and extends in the catheter. According to the invention, the plastic joint is added on the front end of a needle handle, the dangerous needle tip of the front end is packed automatically when the steel needle is pushed out, so that the steel needle with blood after a transfusion is prevented from accidentally injuring doctors or other persons, the possibility of infection of viruses remained on the tip end of the steel needle is reduced, and meanwhile the venous indwelling needle does not pollution the environment.

The invention relates to a device for introducing a medium into a body, in particular to a closed type detaining needle catheter assembly comprising a needle tube, a catheter, a catheter holder and an extending tube joint, wherein the needle tube penetrates through a catheter cavity through a centre shaft of an inner cavity of the catheter holder, and an annular gap cavity is formed between the needle tube and the catheter. The closed type detaining needle catheter assembly is structurally characterized by also comprising an exhaust guide hole, and the exhaust guide hole is arranged on the front end of the catheter holder and communicated with a blood return cavity. The invention has the advantages that the inventor provides the closed type detaining needle catheter assembly capable of enabling transfusion to be fast and convenient by overcoming the technical prejudice of the field; the exhaust guide hole communicated with the blood return cavity is arranged on the front end part of the catheter holder and communicated with an extending tube with an infusion tube during infusion, a gas inside the catheter assembly is fast exhausted to outside through the exhaust guide hole, and infusing fluid can fast enter the catheter assembly through the extending tube for the infusion simultaneously. The invention solves the problems of long-term inconvenient infusion and long waiting timeand provides powerful support for medical needle using demands against time.

A catheter that creates enhanced lesions uses a needle electrode assembly and employs diffuse reflectance optical spectroscopy, including optical transmissive and refractive spectroscopy before, during or after ablation to assess tissue attributes, including malignancy and/or necrosis. The catheter comprises an elongated catheter body, a control handle, and a longitudinally movable needle electrode assembly and one or more optical wave guides extending from the control handle and through the catheter body, wherein the needle electrode assembly is adapted for penetrating and ablating tissue at a distal end of the catheter and at least one optical waveguide is adapted to collect light refracted from the tissue at or near the distal end of the catheter. An integrated ablation and spectroscopy system of the present invention comprises an RF generator, a light source and a light analyzer adapted to analyze the light collected by the at least one waveguide.

The present application relates to a transcatheter valve replacement system. The system includes a valve replacement prosthesis, a delivery catheter, a control handle and an anchoring device; the valve replacement prosthesis includes a valve stent, an artificial valve leaflet and an adaptive covered stent, the artificial valve leaflet is arranged in the valve stent, the adaptive covered stent is connected to the outer periphery of the valve stent, the valve replacement prosthesis is provided with an anchored unit, and the anchored unit is fixed to heart tissue by the anchoring device; and theanchoring device is arranged in the delivery catheter, the anchoring device includes an anchoring needle, an anchoring needle catheter, an anchoring needle push rod, and a controllable guiding device,the anchoring needle is pre-installed in the distal end of the anchoring needle catheter, the distal end part of the anchoring needle catheter has a flexible structure, one end of the controllable guiding device is detachably connected to the anchored unit, and the controllable guiding device can control the distal end part of the anchoring needle catheter to form a fixed bend angle in the radialdirection and make the distal end of the anchoring needle catheter adhered to the anchored unit.

The invention relates to a vein needle catheter pulling force detection device, which comprises a rack assembly. A placement mechanism for placing a vein needle catheter is arranged on the rack assembly; the top of the rack assembly is provided with a positioning device for positioning the vein needle catheter; the position of the positioning device is corresponding to that of the placement mechanism; the rack assembly is also provided with a vein needle catheter clipping device; and the clipping device is connected with a pulling force testing device for detecting whether the pulling force of the vein needle catheter is qualified. By adopting the above technical scheme, detection on the pulling force between a needle seat and an infusion pipe is automatic; and as automatic detection replaces manual operation, the detection efficiency is greatly improved, products can be protected from being polluted by germs, and the cleanliness of products is ensured.

An improved catheter-over-needle system having a hub including a self-suturing mechanism comprising a circular needle rotatably slidable in a circular groove in the hub. The needle is sharpened to a point at an end and preferably is also formed into a tang for use as a handle. The hub is flattened on a side to be adjacent to the skin, defining a hub flat thus truncating the groove through, for example 60° thereof. After the catheter is positioned in the blood vessel, the flat is pressed against the skin. The circular needle is rotated through an angle such that the circular needle passes through a portion of the skin, thereby “self-suturing” the hub to the skin of the patient. The hub is thus firmly attached to the patient, and no separate suturing is required. De-suturing of the catheter requires only reverse rotation of the circular needle.