An infusion system includes a double action infusion pump. The pump includes a cylinder and a reciprocating piston received within the cylinder, the reciprocating piston separating a first pump chamber from a second pump chamber of the cylinder. A reciprocating motor is coupled with the reciprocating piston, and the first and second pump chambers alternate between filling and evacuating conditions with reciprocation of the reciprocating piston through operation of the reciprocating motor, and the speed of reciprocation is varied to provide a continuous output of fluid between the first and second pump chambers. A fluid source and a catheter are optionally coupled with the double action infusion pump. The catheter includes one or more infusion ports near a catheter distal portion, and the one or more infusion ports receive and expel the continuous output of fluid from the double action infusion pump.

An automatic fluid injection device comprising: a base body (1) for coming into contact with an injection zone; a support assembly (2) for supporting an actuator mechanism (5, 6, 7) that is controlled by power supply means (11); at least one fluid reservoir (3), each containing an injection piston (35), arranged in said base body (1); a needle assembly (100) comprising an insertion actuator (8), needle movement means (9, 9′), a priming needle (101) for associating with each reservoir (3) and for penetrating into said reservoir (3) before moving its piston (35), and an injection needle (102) for penetrating into the injection zone and for injecting the contents of said reservoir(s) (3) into said injection zone, said device including at least one actuator button (200) for priming, inserting the injection needle into the injection zone, administering fluid, and then retracting the injection needle.

A mechanical infusion pump device for injecting medication into a patient's IV, includes an IV reservoir and a syringe communicated to the IV reservoir and having a syringe plunger which is moved in a first direction against a mechanical biasing element by engagement with a manually operable, independently movable filling plunger to fill the syringe with fluid medication. The mechanical biasing element is provided for exerting bias on the syringe plunger in a second syringe-discharging direction to dispense medication from the syringe into the patient's IV when the filling plunger is released. Only a calibrated amount of medicine can be discharged to the patent's IV over time as determined by calibration of the biasing element and a metering element located between the syringe and the patient's IV for a given viscosity of the medication.

A pump having two pistons which are parallel and in opposition and are disposed in two, cylindrical, cavities in a pump body, including at least one inlet port and at least one outlet port connected to a rotational port-switching device which can move axially along its rotational axis and is held in abutment in the pump body by a restoring member, in the form of a spring.

Peristaltic pumps are described herein. In certain embodiments, a peristaltic pump includes a plunger, a first biasing member, and a second biasing member. The plunger is movable to selectively engage a pumping volume of a tubing segment to expand the pumping volume to draw fluid flow into the pumping volume and to contract the pumping volume to conduct fluid flow from the pumping volume. The first biasing member is configured to urge the plunger toward the tubing segment to maintain contact with the tubing segment during the expansion of the pumping volume. The second biasing member is configured to urge the plunger toward the tubing segment to contract the pumping volume.

Ultrasound-guided rete testis injection/aspiration devices and methods are described. Some methods include inserting a needle into the rete testis space of a patient and injecting a therapeutic medium through the needle into the rete testis space and seminiferous tubules of the testis. The therapeutic medium can help to treat infertility. In some examples, the method can include monitoring intra-testicular pressure of the patient. In some examples, the therapeutic medium can include stem cells. In some examples, the therapeutic medium can include gene therapy vectors. In some examples, the method can include flushing the rete testis space and seminiferous tubules with a saline solution through the needle. Exemplary devices can include a dual lumen needle, a collection tube, a dual function pump, and flexible tubing. The dual function pump can include a dual syringe pump and a vacuum pump.

A pump cartridge comprises a retention structure to retain a piston for shipping and storage, in which the piston can be decoupled from the retention structure to pump fluid. In the shipping and storage configuration, the piston can be positioned with the retention structure to allow sterilization gas to travel within a housing and into a cylinder distal to the piston. When placed in the console for use in a pumping configuration, the piston can be decoupled from the retention structure to form a seal within the housing. When the procedure has been completed, the pump cartridge can be decoupled from the console in a manner that disables the cartridge for subsequent use to prevent a non-sterile cartridge from being reused.

A dual-action pump includes a cylinder, a piston and a controller. The cylinder includes first and second inlet-outlet ports, each of the first and second inlet-outlet ports is configured to alternately intake a fluid to the cylinder and output the fluid from the cylinder. The piston is configured to be moved within the cylinder in a periodic cycle that alternately reverses a direction of movement of the piston, so as to pump the fluid through the first and second inlet-outlet ports. The controller is configured to control the movement of the piston within the cylinder, including setting to the piston: (a) a first speed, during a first predefined interval that precedes reversing the direction of movement, (b) a second speed, larger than the first speed, during a second predefined interval that follows reversing the direction, and (c) a baseline speed, smaller than the first speed, outside the first and second intervals.

There is described a patch pump comprising a cartridge, a power source, a pump system, a drug delivery device and a control system configured to operate in particular the pump system and the drug delivery device. The pump system includes, on the one hand, a pump having a pump housing containing a pump piston and a valve piston and, on the other hand, a pump drive including a piston motor and a valve motor for driving the pump piston and the valve piston independently from each other through a first and a second transmission. The drug delivery device includes a transdermal delivery system having a needle actuation mechanism configured for transdermal insertion of a cannula.

A disposable single-piston dual-action reciprocating pump part includes a single piston, an output port, and a balloon damper. The output port is configured for outputting fluid pumped by the single piston. The balloon damper is fitted in the output port, and the balloon damper is configured to suppress a pulsation in a flow rate of the outputted fluid.