A device and system for flushing a shunt catheter utilizes the available cerebrospinal fluid (CSF) to flush a blocked catheter. The CSF is pressurized to a predetermined amount and then allowed to suddenly, rapidly and forcefully purge any occlusions. The rapid release of CSF produces flow jets from the catheter pores into the ventricle. This impulse, or cough, will push and divert choroid plexus and/or other blockages away from the pores. The device and system may then be allowed to refill at a slow rate, thus reducing the possibility of rapid suction of fluid back into the system and the attendant possibility of drawing the choroid plexus back into the pores. The catheter at the proximal end may also include back-up pores that can be opened to restart flow from the ventricle should the primary pores remain blocked after a flushing attempt.

Systems and methods are provided for intermittent microinfusion. A system may include a pump and an IV set that includes a y-port valve disposed below a pump interface portion of the IV tubing. The y-port valve may include an internal valve member that allows fluid to flow from the pump to a patient when no syringe is attached to the y-port. The internal valve member may be moved by the attachment of a syringe containing the medication to be infused to the y-port such that the fluid pathway from the pump to the patient is blocked and fluid from the syringe can be injected into the IV tubing between the y-port valve and the pump. The pump may retrograde pump the medication into the tubing via the y-port valve and then forward pump the medication to the patient when the syringe is removed from the y-port.

A medical pump, comprising: a fluid housing having a plurality of intake openings, sealed by at least one intake valve, and an outlet opening sealed by an outlet valve; a piston which is sealing the fluid housing and connected to a drive mechanism, the drive mechanism pulls the piston to draw fluid from one of the plurality of intake openings and pushes the piston to discharge the fluid into the outlet opening; and a selecting valve enclosing at least two tubes, each providing fluid to one of the plurality of intake openings, wherein the selecting valve closes one of the at least two tubes while opening another of the at least two tubes.

Disclosed are examples of valve systems and methods of operating the respective valve systems. An example valve system may include a valve body, an inlet component, an outlet component and a valve tube. The valve body may include a first void and a second void. The inlet component may be coupled to the first void and the outlet component may be coupled to the second void. The valve tube may include a side port and may be positioned through the valve body and coupled to the first void, the inlet component, the second void, and the outlet component. Other valve system examples may include including a valve body, a first septum, a second septum, a first piston, a second piston and a tube. The disclosed methods describe the interaction of the respective components of the respective valve system example.

A collection fitting, system, and method for sampling fluid from a tissue site is described. The collection fitting includes a housing having a central passage, a first union, and a second union. The first union and the second union are in fluid communication with the central passage. The collection fitting also includes a plunger disposed in the housing and movable between a sampling position and a bypass position. The plunger includes a bypass passage configured to fluidly couple the first union and the second union through the central passage in the bypass position. The collection fitting also includes a cap having a boss configured to be inserted into the central passage. The boss includes a first inlet and a second inlet and inserts into the central passage to move the plunger. The first and second inlet fluidly couple the first union and the second union in the sampling position.

The invention relates to a catheter device (100) comprising a catheter (68) for insertion into a living being and at least one lumen (69, 70, 74, 79) for guiding a fluid flow within a section of the catheter device, and comprising a valve for controlling a fluid flow, in particular through a catheter, having a valve control chamber (12, 12a), into which an inlet opening (1a) of an inlet channel (1) and an outlet opening (2a) of an outlet channel (2) open, and further having a closure element (5, 13, 17) which can be moved in the valve control chamber (12, 12a) in a controlled manner and which, in at least a first position (I), closes the outlet opening (2a), in at least a second position (II) closes the inlet opening (1a), and which, in at least a third position (III), keeps open a connecting channel between the inlet opening (1a) and the outlet opening (2a), a valve train (A, A, B, B, 3, 14, 18) being provided and optionally moving the closure element (5, 13, 17) to at least the first, second or third position, and the at least one lumen (68, 70, 74, 79) being fluidically connected to the inlet channel or the outlet channel.

A valve may have a fluid inlet and a fluid outlet. The valve may include a valve stem having a lumen extending from a first opening at a proximal portion of the valve stem to a second opening at a distal end of the valve stem. A plurality of seals may be positioned relative to the valve stem. The valve stem and seals may be configured so that a fluid entering the inlet is prevented from flowing to the outlet in a first position of the valve stem and relative to the inlet and the outlet. The valve stem and the seals may be configured so that a fluid entering the inlet flows to the outlet in a second position of the valve stem relative to the inlet and the outlet, the second position being more distal than the first position relative to the inlet and the outlet.

Drip chambers, burettes and other IV set components are described herein. An IV set component described herein comprises a chamber body, an inlet portion, and a disk valve. The chamber body defines a chamber volume and an outlet. The chamber volume is in fluid communication with the outlet. The inlet portion is coupled to the chamber body, the inlet portion defining an inlet, a priming port, a drip port. The inlet is in fluid communication with the priming port and the drip port, and the priming port and the drip port are each in fluid communication with the chamber volume. The disk valve is coupled to the inlet portion. The disk valve is movable to direct flow from the inlet to the priming port in a first position and to direct flow from the inlet to the drip port in a second position.

A retrograde disposable intravenous (IV) set is disclosed. The IV set includes a diverter housing between upper and lower portions of a fluid line, the diverter housing including a lower end and an upper end extending away from the lower end and the fluid line to a syringe port located in the upper end, and a diverter member within the diverter housing and configured to move within the diverter housing from a first position, at which a first opening through the diverter member forms a first fluid pathway between the upper portion and the lower portion of the fluid line, to a second position, at which the first fluid pathway is blocked and a second fluid pathway is formed between the upper portion of the fluid line and a syringe port. Retrograde infusion may occur when the diverter member is in the second position.

A valve may have a fluid inlet and a fluid outlet. The valve may include a valve stem having a lumen extending from a first opening at a proximal portion of the valve stem to a second opening at a distal end of the valve stem. A plurality of seals may be positioned relative to the valve stem. The valve stem and seals may be configured so that a fluid entering the inlet is prevented from flowing to the outlet in a first position of the valve stem and relative to the inlet and the outlet. The valve stem and the seals may be configured so that a fluid entering the inlet flows to the outlet in a second position of the valve stem relative to the inlet and the outlet, the second position being more distal than the first position relative to the inlet and the outlet.