136 results about "Peripheral intravenous" patented technology

This invention relates to a venous cannula for use in conjunction with cardiovascular examinations, treatments and surgery. The venous cannula is configured for two-stage drainage of oxygen-depleted venous blood from a central venous location via a peripheral venous insertion site, such as a femoral vein. The venous cannula is optimized for use in a cardiopulmonary bypass system that includes a multichannel arterial perfusion catheter. The cardiopulmonary bypass system is advantageous for use in performing standard open chest or least invasive cardiac surgical procedures.

A blood pump system for persistently increasing the overall diameter and lumen diameter of peripheral veins and arteries by persistently increasing the speed of blood and the wall shear stress in a peripheral vein or artery for a period of time sufficient to result in a persistent increase in the overall diameter and lumen diameter of the vessel is provided. The blood pump system includes a blood pump, blood conduit(s), a control system with optional sensors, and a power source. The pump system is configured to connect to the vascular system in a patient and pump blood at a desired rate and pulsatility. The pumping of blood is monitored and adjusted, as necessary, to maintain the desired elevated blood speed, wall shear stress, and desired pulsatility in the target vessel to optimize the rate and extent of persistent increase in the overall diameter and lumen diameter of the target vessel.

A method and apparatus for ultrafiltration of blood operating by removing blood from a peripheral blood vessel at a rate of less than two percent of total cardiac output of a patient, extracting fluid at a rate of 0.1 liter to 1.0 liters per hour while retaining cells and proteins in the blood, and returning the concentrated blood to a secondary blood vessel is disclosed. Blood is removed and returned using small gage needles. As a pump circulates blood from the patient, a filter removes ultrafiltrate from the blood using duty cycle or pump control, and a transparent container collects the removed fluid.

The current invention relates to infusion devices, specifically to peripheral intravenous (IV) catheters. In particular, the invention relates to peripheral IV catheter assemblies having features to enable selective and reversible activation of fluid flow through the catheter assembly. Some implementations of the present invention include various configurations of septum valves having a barrier surface that is stressed to bias the barrier surface and provide a pathway through the septum valve.

A venovenous expandable dialysis apparatus includes a blood feeding needle component configured to introduce blood at a position of a first peripheral vein and a blood withdrawal needle component configured to withdraw blood at another position from a second peripheral vein located, where the first position is located away from the second position. The expandable dialysis apparatus further includes a guide wire having a central axis, an expanding sheath configured circumferentially around the guide wire to form an annular lumen between a distal blood withdrawal position and a proximal extracorporeal position; and a needle disposed around the expandable sheath.

Apparatus, systems and methods are provided for using the PG waveform to determine peripheral venous and arterial saturations. Generally, saturations are determined by isolating an indicator of venous or arterial blood volume in each of a plurality of PG waveforms and using the isolated indicators to determine saturation in the corresponding region of the vasculature. Indicators may include respiratory induced variations of AC and / or DC components of the PG waveforms, peaks of the PG waveforms, troughs of the PG waveforms, venous pulsations of the PG waveforms, etc. Indicators may further be isolated in either the time or frequency domain. The isolated indicators may advantageously be normalized, e.g., based on a baseline of the PG waveform or a derivative thereof.

A system and method for increasing the speed of blood and wall shear stress (WSS) in a peripheral vein for a sufficient period of time to result in a persistent increase in the overall diameter and lumen diameter of the vein is provided. The method includes pumping blood at a desired rate and pulsatility. The pumping is monitored and adjusted, as necessary, to maintain the desired blood speed, WSS and pulsatility in the peripheral vein in order to optimize the rate and extent of dilation of the peripheral vein.

The present disclosure relates to a rotary blood pump with a double pivot contact bearing system with an operating range between about 50 mL / min and about 1500 mL / min, wherein the force on the upper bearing is less than 3N during operating speeds up to 6000 rpm. The disclosure also relates to a method of using a blood pump system for persistently increasing the overall diameter and lumen diameter of peripheral veins and arteries by persistently increasing the speed of blood and the wall shear stress in a peripheral vein or artery for period of time sufficient to result in a persistent increase in the overall diameter and lumen diameter of the vessel.

A high-volume peripheral intravenous (IV) catheter and method includes an elongate stylet removably disposed in the lumen of an elongate catheter with the stylet having a beveled distal end forming a piercing tip that protrudes from the outlet port of the catheter. The catheter has a proximal cylindrical shape from the inlet port transitioning at a transition to an inner lumen conical taper terminating at the outlet port, and having a larger internal diameter at the inlet port and a tapering smaller internal diameter between the transition and the outlet port. A plurality of side outlet ports is formed laterally through the catheter in the inner lumen conical taper. A cross-sectional area of the outlet port and the side outlet ports together is equal or greater than a cross-sectional area of the inlet port.

The invention belongs to the medical teaching equipment technical field and relates to a fully-automatic multi-functional integrated puncture training computer dummy. The fully-automatic multi-functional integrated puncture training computer dummy comprises a high-simulation human body model, a position-automatic changing experimental table, puncture cavities, modules, arteriovenous veins, a liquid injection automatic control device, a fully-automatic arterial pulse simulator and a microcomputer controller. The dummy is characterized in that the high-simulation human body model is installed on the position-automatic changing position experimental table and is provided with various puncture cavities / modules such as pneumothorax, hydrothorax and abdominocentesis modules which are all connected with the microcomputer controller and / or a micro water pump / air pump; double-layer metal mesh electrodes are distributed on the neck, thoracic puncture and lumbar puncture positions of the dummy; the dummy is further provided with kidney, bladder, lymph gland and bone marrow puncture cavities / modules as well as a variety of puncturable central veins and peripheral veins; and arteries are connected with a fully-automatic blood circulation simulator. With the dummy adopted, dozens of puncture items can be provided; puncture position change, liquid injection, gas injection and artery pulsing are completely automated; and sound-light alarms can be given out automatically; life-like simulation effects can be realized; and teaching effects can be significantly improved.

A Peripheral Intravenous Safety Catheter with Quick, Painless Puncture System (PISCQPPS) and a cannula with a retractile needle mounted in a manually operated bellows mechanism to prevent re-use, avoid accidental perforation and ensure safe disposal. This PISCQPPS offers the advantages of reducing or eliminating pain; reducing the possibility of multiple perforation; reducing the need for experience and technical know-how in the matter of injection; being fitted with a safety system; and easy to use. The PISCQPPS consists of two sequential operating systems-namely, a painless insertion system that is located inside a case, consisting of a catheter, a catheter holder, a trigger guard, a trigger-guard holder, a catheter-holder tube, a cannula, a cannula holder, a spring, a filter holder, and a filter; along with a safety system inside whose case the cannula holder, the cannula and the bellows all operate at the same time.

This invention relates to a venous cannula for use in conjunction with cardiovascular examinations, treatments and surgery. The venous cannula is configured for two-stage drainage of oxygen-depleted venous blood from a central venous location via a peripheral venous insertion site, such as a femoral vein. The venous cannula is optimized for use in a cardiopulmonary bypass system that includes a multichannel arterial perfusion catheter. The cardiopulmonary bypass system is advantageous for use in performing standard open chest or least invasive cardiac surgical procedures.