234 results about "Indwelling catheter" patented technology

An indwelling catheter has a hollow catheter body, a catheter tube fitted to a front end of the catheter body, an elastic valve fitted inside the catheter body, and a hollow plug slidably fitted inside the catheter body. The catheter tube, the elastic valve, and the plug are aligned in this order. A connector inserted from a proximal end of the catheter pushes the plug, and the plug presses the elastic valve open.

A device for penetrating tissue and removing a biological sample includes a biological sampling element to remove a biological sample. The biological sampling element includes a passage therethrough. The device further includes a penetrator positioned within the passage. The penetrator is energized in a repetitive manner to assist in penetrating tissue. The biological sample element can be adapted to remove a tissue sample or a biological fluid sample (for example, blood). A device for penetrating tissue and positioning a tissue resident conduit (for example, a catheter), includes a tissue resident conduit (for example, a catheter) including a passage therethrough; and a penetrator in operative connection with the catheter. A device for inserting a tissue resident conduit includes at least one component that is energized during penetration to assist in penetrating tissue. In one embodiment, the tissue resident conduit is flexible and the energized component is positioned or a forward end of the tissue resident conduit. The device can further include a mechanism for directing the penetration of the tissue resident conduit. A needle for penetrating tissue includes a first effector including a surface and at least one actuator in operative connection with the first effector. The actuator is adapted to cause motion of the first effector such that tearing of tissue takes place in regions where there is close proximity of tissue to the surface of the first effector.

Methods, systems and devices are described for new modes of ventilation in which specific lung areas are ventilated with an indwelling trans-tracheobronchial catheter for the purpose of improving ventilation and reducing hyperinflation in that specific lung area, and for redistributing inspired air to other healthier lung areas, for treating respiratory disorders such as COPD, ARDS, SARS, CF, and TB. Trans-Tracheobronchial Segmental Ventilation (TTSV) is performed on either a naturally breathing or a mechanical ventilated patient by placing a uniquely configured indwelling catheter into a bronchus of a poorly ventilated specific lung area and providing direct ventilation to that area. The catheter can be left in place for extended periods without clinician attendance or vigilance. Ventilation includes delivery of respiratory gases, therapuetic gases or agents and evacuation of stagnant gases, mixed gases or waste fluids. Typically the catheter's distal tip is anchored without occluding the bronchus but optionally may intermittently or continuously occlude the bronchus. TTSV is optionally performed by insufflation only of the area, or by application of vacuum to the area, can include elevating or reducing the pressure in the targeted area to facilitate stagnant gas removal, or can include blocking the area to divert inspired gas to better functioning areas.

Indwelling catheter having an upper distal end having a portion that can expand within a bladder type spaces without having to be inflated. An embodiment allows for at least one slit on an upper side of the catheter tube and a head member that when pulled down by a stylette moving inside the catheter causes a bulge wing portion(s) that holds the catheter safely and painlessly within the bladder. Magnetic and electret valves can be included inside the tube of the catheter that can cycle between open and closed positions when activated by normal bladder pressure when urination is desired. The novel catheter tube can naturally conform to an opening and closing urethra during natural bladder drainage. The catheter tube surface can include an anti-microbial layer that is either or both coated and impregnated thereon with either an antibacterial and/or hydrophyllic materials. Sampling ports can be located on both inside catheter tube valves and on an externally attached magnetic valve.

Methods, systems and devices are described for temporarily or permanently evacuating stagnating air from a diseased lung area, typically for the purpose of treating COPD. Evacuation is accomplished by displacing the stagnant CO₂-rich air with a readily diffusible gas using a transluminal indwelling catheter specially configured to remain anchored in the targeted area for long term treatment without supervision. Appropriate elevated positive gas pressure in the targeted area is then regulated via the catheter and a pneumatic control unit to force under positive pressure effusion of the diffusible gas out of the area into neighboring areas while inhibiting infusion of other gases thus effecting a gradual gas volume decrease and deflation of the targeted area.

An indwelling catheter set is provided with a catheter, a cover connected with a proximal end of the catheter and a connector having a hemostatic valve housed therein. The connector is fixed to the cover. A hollow needle for transfusion to a patient is slidably fitted to an inside of the catheter.

A stent graft (40) has a tubular body with a first bifurcation (54) with first and second legs (50, 52) extending from the bifurcation. One of the legs (52) has a further bifurcation (62) to define a side arm. The stent graft can be deployed into the vasculature of a patient with the tubular body being in an aorta of the patient, a first leg extending down an iliac artery, a second leg being directed towards a contralateral iliac artery and the side arm directed to an internal artery of one of the iliac arteries. One of the legs can include a valved aperture to enable the placement of an indwelling catheter therethrough

This invention relates to an infusion device for a catheter lock solution, to a method of enhancing the patency of catheters in animals and to a catheter lock solution. The device includes a syringe (34) containing a lock solution comprising a citrate salt. The method for enhancing the patency of catheters includes infusing a lumen (14, 16) of an indwelling catheter (10) with a lock solution comprising a citrate salt. In one aspect of the invention, the catheter lock solution includes a citrate salt and a viscosifying agent. The lock solution is prepared to have sufficient viscosity and density to remain in the lumen for a desired amount of time.

Embodiments of the invention provide a system for temperature control of the human body. The system includes an indwelling catheter with a tip-mounted heat transfer element. The catheter is fluidically coupled to a console that provides a heated or cooled heat transfer working fluid to exchange heat with the heat transfer element, thereby heating or cooling blood. The heated or cooled blood then heats or cools the patient's body or a selected portion thereof. In particular, strategies for providing cooling while reducing shivering are disclosed, including administration of various drugs and drug combinations.

A device for controlling fluid flow through an indwelling catheter assembly. The device includes a septum that is closed by default but that may be defeated temporarily by either exerting a force on a contact surface of the septum, or by biasing the septum with a probe.

This invention relates to an infusion device for a catheter lock solution, to a method of enhancing the patency of catheters in animals and to a catheter lock solution. The device includes a syringe (34) containing a lock solution comprising a citrate salt. The method for enhancing the patency of catheters includes infusing a lumen (14, 16) of an indwelling catheter (10) with a lock solution comprising a citrate salt. In one aspect of the invention, the catheter lock solution includes a citrate salt and a viscosifying agent. The lock solution is prepared to have sufficient viscosity and density to remain in the lumen for a desired amount of time.

An indwelling urinary catheter assembly is disclosed having an indwelling catheter and a sheath enclosing an insertable portion of the indwelling catheter.

A system for detecting whether a vascular access has been interrupted in an arrangement in which two catheters or needles are present in a blood vessel, fistula or graft. A fluid line leading to a pump is connected via a first connector to a first indwelling catheter, and a fluid line leading from a pump is connected via a second connector to a second indwelling catheter. Each connector is equipped with an electrode in contact with the lumen of the connector, the electrodes electrically connected to an electronic circuit that measures the impedance or conductivity of fluid between the first connector and second connectors via a fluid path through the blood vessel, fistula or graft. An electronic controller receives the impedance or conductivity data and processes the data to determine whether a vascular access disconnection has occurred. The processing may involve filtering the signal received by the controller, and/or setting provisional flags for a disconnection event that may be cleared if the signal changes before the expiration of a counter.

A therapeutic agent-eluting stylet treats a catheter by at least temporarily locating the stylet in a lumen of an indwelling catheter placed into a patient. The therapeutic agent-carrying stylet provides a localized therapeutic effect to the catheter and patient by eluting one or more therapeutic agents directly into the lumen of the catheter, into the fluid within the catheter, into the fluid and tissue in contact with the catheter, and onto the surface of the catheter. By removal and replacement of the temporary stylet from the catheter, renewable therapeutic agent doses can be provided to a component, such as the lumen, of the catheter while the catheter remains within in a patient. One or more therapeutically effective doses of medicated agents can be tailored along the length of the stylet and controlled by the length of time by which the stylet remains installed in the catheter.

An indwelling urinary catheter having a simple structure that can discharge urine easily is disclosed. The indwelling urinary catheter comprises a body that includes an inserted part to be inserted into the bladder, and a non-inserted part that is formed in one body with the inserted part and positioned outside of the bladder, a discharging tube installed inside of the body for discharging the urine, the first fixing member formed inside of the inserted part, and an expander one end of which is fixed to the first fixing member. Typical problems associated with the conventional balloon-shaped fixing member are resolved because the indwelling urinary catheter is fixed in a desirable position by an expanding a part of the body. Also, because the indwelling urinary catheter of the present invention needs no additional fixing devices such as the balloon-shaped fixing device but instead can be fixed by the expander, it has a simple structure and enlarged inner diameter of the discharging tube. Thus urine is discharged from the bladder effectively. Moreover, the indwelling urinary catheter has a long life and can be manufactured economically and quickly due to the simple and effective structure.

The present invention relates generally a device for locating an indwelling catheter relative to its initial location. The system of the invention is based on emitting light from an optical probe placed on the patient to an optical marker on the tip of the catheter. The reflected light from the optical marker is then detected by the optical probe and the reading is recorded to memory as the reference measurement. The position of the optical probe on the patient is marked so that future measurements are taken from the same location. These future measurements will be compared to the reference measurement and from this comparison the displacement of the tip of the catheter is found and can be corrected. This system is fast, non-invasive, radiation free, and accurate to within 2-3 mm.

A system and method uses a wireless temperature sensor in a patient to provide feedback to a patient temperature control system for warming or cooling the patient using an external pad or indwelling catheter.

The invention is a system (10, 110) for regulating volume in a retention cuff/balloon (20) in an indwelling catheter; i.e., the combination of fixed-volume inflatable retention cuff mountable on a patient proximal end of an indwelling catheter (14) and relief valve (23, 123) connected to the cuff. The relief valve has ends for selective introduction of fluid to the cuff and for connection to an inflation tube. A valve port (24, 124) permits escape of excess fluid when a maximum cuff volume has been exceeded, and inflation tube (22) connects cuff (20) to the relief valve. The inflation tube has ends in fluid-tight connection to an interior of the cuff, and the relief valve to thereby permit the cuff and valve to be in fluid communication with each other for selective filling of the cuff to insert and safely retain an indwelling catheter in a patient for an extended period.

Embodiments of the invention provide a system for temperature control of the human body. The system includes an indwelling catheter with a tip-mounted heat transfer element. The catheter is fluidically coupled to a console that provides a heated or cooled heat transfer working fluid to exchange heat with the heat transfer element, thereby heating or cooling blood. The heated or cooled blood then heats or cools the patient's body or a selected portion thereof. In particular, methods and devices, including software, are provided for administering cooling or rewarming and controlling the same based on a projected control temperature measured by a temperature sensor within the catheter.

An indwelling catheter is positioned in a urinary tract to drain urine from the bladder to a position distally adjacent to a sphincter muscle. A balloon of the catheter is inflated through an inflation tube extending through the urinary tract. A coiled section of the inflation tube contacts the constriction caused by the sphincter muscle. The balloon and the coiled section resist movement of the indwelling catheter while still permitting natural urination. The indwelling catheter is inserted by an insertion tool which is separably connected to the catheter. Once the indwelling catheter is positioned, the tool is disconnected and withdrawn from the urinary tract. Risks of blood clots obstructing the flow of urine through the indwelling catheter immediately following a surgical procedure on the prostate gland are avoided by flushing fluid through the insertion tool and the catheter to clear an internal urine flow passageway in the catheter.