301 results about "Intravenous catheter" patented technology

The present invention is directed to a valve assembly in an intravenous catheter that facilitates the administration of fluid to a patient through the intravenous catheter by a needleless device. The valve assembly of the present invention contains means for providing a positive displacement of fluid from the catheter at a time when a needleless device is removed from the valve assembly following its connection to the valve assembly.

A needle safety device for an intravenous catheter apparatus that includes a base capable of receiving a needle into opposing jaws attached to the base and capable of being influenced by the needle. The jaws move between an expanded position which interact with an obstruction within a wing housing of the intravenous catheter apparatus. The jaws permit relative movement of the needle with the base when expanded, close around a needle tip as it passes the jaws, and prevent relative movement of the needle with the base when the jaws are collapsed. The needle of the intravenous catheter apparatus may then be safely disposed with the needle tip within the needle safety device.

Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrodes. Further, depending upon the embodiment implemented, one or more electrodes may be attached to the patient's skin. The voltage across the electrodes is used to generate a P wave. A reference deflection value is determined for the P wave detected when the tip is within the proximal superior vena cava. Then, the tip is advanced and a new deflection value determined. A ratio of the new and reference deflection values is used to determine a tip location. The ratio may be used to instruct a user to advance or withdraw the tip.

A medicament injection kit, for use in occluding a renal artery and a renal vein in a kidney and injecting a therapeutic medicament into the kidney so as to pressurize the kidney, includes: an artery catheter which includes a first balloon capable of occluding the renal artery; a vein catheter which includes a second balloon capable of occluding the renal vein; a syringe for injecting the therapeutic medicament, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter; and a syringe for pressurizing the inside of the kidney by injecting a liquid, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter.

A hypotube for an intravenous catheter device is disclosed which includes a tubular shaft having a tubular wall defining a lumen. The shaft includes a main section integrally connected to a distal section. The distal section includes a first section connected to the second section and disposed between the second section and the main section. The second section includes an elongated stinger.

An intravenous catheter introducer assembly having a safety feature to prevent accidental needle sticks. The introducer assembly includes a needle assembly having a groove disposed on its outer surface. The introducer includes a protector made of a hollow member having an open distal end and an inwardly disposed resilient flange or a clip disposed thereon. The protector is coaxially slidably disposed around the needle with the flange abutting the outer surface of the needle and adapted to engage the groove when a catheter assembly is removed from the needle.

The invention includes a method of locating a tip of a central venous catheter (“CVC”) having a distal and proximal pair of electrodes disposed within the superior vena cava, right atrium, and/or right ventricle. The method includes obtaining a distal and proximal electrical signal from the distal and proximal pair and using those signals to generate a distal and proximal P wave, respectively. A deflection value is determined for each of the P waves. A ratio of the deflection values is then used to determine a location of the tip of the CVC. Optionally, the CVC may include a reference pair of electrodes disposed within the superior vena cava from which a reference deflection value may be obtained. A ratio of one of the other deflection values to the reference deflection value may be used to determine the location of the tip of the CVC.

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.

An intravenous catheter placement device having a hollow body and a nose on one end of the hollow body. A needle hub fits within the nose and contains a needle embedded therein. A catheter is free to slide along the needle and substantially covers the shaft of the needle. Winged beams on the needle hub include catches and release tabs that cooperate with slots in the nose to retain the needle hub in the nose. A magnified transparent verification cavity in the needle hub provides for viewing blood flash in the cavity to verify that the intravenous catheter is inserted into the correct location. An energy storage device in contact with the needle hub releasably retains the needle hub to prevent premature projection of the needle hub into the hollow body. Upon insertion of the intravenous catheter and introducer needle into a patient, depressing the release tabs triggers the needle hub and blunts the needle within the catheter and projects the needle hub and embedded needle into the hollow body.

to protect against accidental needle prick a catheter and insertion device are provided wherein the needle is retractable within the device after insertion of the catheter. The device comprises a hollow barrel or tube of semi-rigid plastic material into which the needle can be retracted after use. The barrel includes a resealable closure at the insertion that opens to allow passage of the needle and catheter and closes to reseal the barrel when the needle is retracted. A cap is provided that covers the barrel to further seal the device after use.

A hemodialysis and vascular access system comprises a subcutaneous composite PTFE silastic arteriovenous fistula having an indwelling silastic venous end which is inserted percutaneously into a vein and a PTFE arterial end which is anastomosed to an artery. Access to a blood stream within the system is gained by direct puncture of needle(s) into a needle receiving site having a tubular passage within a metal or plastic frame and a silicone upper surface through which needle(s) are inserted. In an alternate embodiment of the invention, percutaneous access to a blood stream may be gained by placing needles directly into the system (i.e. into the PTFE arterial end). The invention also proposes an additional embodiment having an arterialized indwelling venous catheter where blood flows from an artery through a tube and a port into an arterial reservoir and is returned to a vein via a port and a venous outlet tube distinct and distant from the area where the blood from the artery enters the arterial reservoir. The site where blood is returned to the vein is not directly fixed to the venous wall but is free floating within the vein. This system provides a hemodialysis and venous access graft which has superior longevity and performance, is easier to implant and is much more user friendly.

A system for disinfecting an intravenous catheter and/or other fluidic tubing includes attaching a device around the catheter and delivering a high dose of ultraviolet or other type of radiation to the catheter connection point and adjacent tubing. The device may include a UV radiation source connected to a catheter attachment assembly via fiber optic cable, allowing transmission of UV radiation from the source to an internal reflector unit. The UV source may be built into the catheter connection assembly. The device may be a handheld device that fits over a catheter connection point, with single or multiple integrated UV sources to deliver 360 degree radiation around the catheter, with mirrors to increase light delivery. The method involves controlled exterior irradiation of a catheter connection point to disinfect the lumen via transmitted light through the catheter wall. Commercially available catheters or those specially designed for passage of radiation may be used.

The present invention relates to a needle-stick protector for an intravenous catheter having a body, a needle hub, a needle, and means for ensuring that the needle-stick protector is not removed from a catheter hub before the needle is fully retracted and locked in the body of the needle-stick protector.

An intravenous catheter inserting device includes a catheter hub engaging an open forward end of a barrel and having a duct that communicates with a passage of the barrel. A tubular catheter is disposed to communicate with the duct, and permits a needle cannula to pass therethrough. A plunger is received in the passage and extends rearwardly of the barrel so as to be manually operable. The plunger has a cavity containing fluid at a reduced pressure, and is coupled with the needle cannula within the passage such that the needle cannula can be retracted into the cavity due to a pressure difference between the ambient air and the reduced pressure.

A device for fixing a catheter, such as a peripheral veinous catheter, a central veinous catheter or a central arterial catheter, to the body of a patient. The device includes a housing, which can be closed by a lid, and a base coupled to the housing, surrounding the housing and enabling the housing to be fixed to the skin of the patient. The housing includes a first chamber through which the outer part of the catheter, which is placed in the vein, passes and a second chamber for accommodating and maintaining the catheter.

Apparatus for Detecting the Position of a Catheter Apparatus for detecting the position of a catheter comprising a catheter, electrically conductive means associated with the catheter, a connector for establishing an electrical connection between the electrically conductive means associated with the catheter and an output of the connector and a controller having at least one output connectable to an ECG patient connector, wherein the controller includes at least one input and the said at least one input includes an electrical connection from the controller to the output of the connector and wherein the controller includes means for generating a low impedance output signal.

An intravenous catheter insertion device is disclosed to include a barrel, which has a body and a stop wall, a deformable portion extending from the body, a retainer connected with the deformable portion, and a press portion for pressing by the user to deform the deformable portion. A needle set, which has a cylindrical needle holder, a needle fastened to the needle holder at the front side, a springy stop portion extending from the needle holder, and a retainer connected with the needle holder near the front end of the needle holder. And a spring member, which is mounted around the needle set inside the barrel, and has a first end stopped against the stop wall of the barrel and a rear end stopped against the springy stop portion of the needle set.