Syringes are described herein. In certain embodiments, a syringe includes a syringe body, a movable plunger, and a biasing member. The syringe body defines a cavity and a port in fluid communication with the cavity. The movable plunger is disposed within the cavity. The plunger and cavity define a volume. The port is in fluid communication with the volume. The biasing member is coupled to the plunger. The biasing member is configured to urge the plunger toward the port to dispense a fluid stored within the volume at a desired rate.

A fluid delivery device comprises a hydraulic pump chamber having a hydraulic fluid. A fluid reservoir is coupled to the hydraulic pump chamber and is configured to contain a fluid deliverable to a patient. A first actuator is coupled to the hydraulic pump chamber and is configured to pressurize the hydraulic pump chamber and configured to transfer energy through the hydraulic pump chamber to the fluid reservoir. A second actuator is coupled to the hydraulic pump chamber and is configured to pressurize the hydraulic pump chamber and configured to transfer energy through the hydraulic pump chamber to the fluid reservoir.

An infusion pump (18) for delivery of a fluid is disclosed. The infusion pump allows a user to selectively control a flow rate of a fluid and includes a spike member (26) that is connectable to an injection port of an intravenous fluid container (12).

The present invention relates to a flow rate regulator for intravenous injection, capable of preventing an operating roller from rotating, where a flow rate of an intravenous fluid is adjusted by the operating roller, to keep the flow rate of the intravenous fluid from varying, the flow rate regulator including: a body having a space portion penetratedly formed thereinto in an up and down direction to connect an infusion tube thereto and a roller connection hole formed on the front surface thereof; the operating roller fitted to the roller connection hole of the body, moving up and down along the roller connection hole, and pressurizing the infusion tube thereagainst to allow the flow rate of the intravenous fluid to be regulated; and a roller holder connected to the body to which the operating roller is fitted and supporting the operating roller thereagainst to prevent the operating roller from moving.

A method of determining the status of a fluid cooled microwave ablation system is provided including providing an electrical current to a pump to pump fluid through an ablation system along a fluid path to cool the ablation system, measuring an electrical current drawn by the pump, and determining a status of the ablation system based on the measured electrical current. In another aspect of the disclosure, an ablation system is provided including an ablation probe defining a fluid path for circulation of fluid therethrough, a generator configured to supply energy to the ablation probe for treating tissue, a pump configured to pump fluid through the fluid path of the ablation probe to cool the ablation probe, a sensor configured to measure an electrical current drawn by the pump, and a computing device configured to determine a status of the ablation system based on the measured electrical current.

The present technology is generally directed to adjustable shunting systems for draining fluid from a first body region to a second body region. The adjustable shunting systems include a flow control plate or cartridge for controlling the flow of fluid through the system. For example, the flow control plate can include a shape memory actuation assembly having one or more nitinol actuators for controlling the flow of fluid through the system. The flow control plate can further include a plurality of discrete sheets or layers adhered together to encase the shape memory actuation assembly. The discrete sheets or layers can form flow channels for directing fluid through the flow control plate.

A system and method for patient-adaptive hemodynamic management is described. One embodiment includes a system for hemodynamic management including transfusion, volume resuscitation with intravenous fluids, and medications, utilizing monitored hemodynamic parameters including the described dynamic predictors of fluid responsiveness, and including an intelligent algorithm capable of adaptation of the function of the device to specific patients.

Infusion systems, infusion devices, and related operating methods are provided. An exemplary method of operating an infusion device capable of delivering fluid to a patient involves obtaining, by a control system associated with the infusion device, user input indicating an activity by the patient, obtaining historical data for the patient corresponding to the activity, determining a probable patient response corresponding to the activity based at least in part on the historical data for the patient, determining an adjustment for delivering the fluid by the infusion device based at least in part on the probable patient response, and operating the infusion device to deliver the fluid to the patient in accordance with the adjustment.

A method for readying a fluid sensor associated with a medical device includes attaching a flow restrictor to a fluid outlet of the fluid sensor. The fluid sensor includes a fluid channel, a fluid inlet at a first end of the fluid channel configured to couple to an outlet of an administrable fluid source, and the fluid outlet at a second end of the fluid channel. Fluid is delivered from the administrable fluid source to the fluid channel through the fluid inlet. A syringe actuation device including a force limiting device may be used to deliver the fluid. The fluid is pressurized in the fluid channel between the fluid inlet and the flow restrictor to wet an interior surface of the fluid channel with the fluid. The flow restrictor is removed from the fluid outlet.

A two-part bioactive agent delivery system, the system including a disposable part comprising an agent reservoir, a bolus chamber, the volume of the bolus chamber being less than the volume of the agent reservoir, an agent outlet, and a valve having a first position communicating the agent reservoir with the bolus chamber and a second position communicating the bolus chamber with the outlet; and a reusable part including a valve driver, a power source and control electronics, the control electronics being adapted to control the valve driver to actuate the valve to deliver bioactive agent from the agent reservoir to the agent outlet; the system further having a spring extending between the agent reservoir piston and a surface of the reusable part or of the disposable part to pressurize the agent reservoir when the spring is compressed and the agent reservoir contains a quantity of bioactive agent.