A medical fluid injection device, a medical fluid transfer device and a method of administering and transferring a medical fluid are disclosed. The device and method may include a compressed gas canister in fluid communication with an expandable elastic bladder positioned within a vial of drug to provide a means to deliver drug through an injection cannula that is movable between a plurality of positions or through a transfer conduit.

A high pressure delivery system for delivering a medicament, comprising a first chamber for storing a supply of the medicament, a gear pump assembly in fluid communication with the first chamber, said gear pump assembly having a dose inlet and a dose discharge, said dose inlet having a larger diameter than said dose discharge to provide a high pressure discharge, and a fluid connection path in fluid communication with the gear pump assembly for delivering the medicament to a high pressure area.

A high pressure delivery system for delivering a medicament, comprising a first chamber for storing a supply of the medicament, a gear pump assembly in fluid communication with the first chamber, said gear pump assembly having a dose inlet and a dose discharge, said dose inlet having a larger diameter than said dose discharge to provide a high pressure discharge, and a fluid connection path in fluid communication with the gear pump assembly for delivering the medicament to a high pressure area.

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of an apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of an apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.

A delivery device may comprise a main body. The main body may comprise a peripheral region. The main body may further comprise a central region extending proud of the peripheral region. The peripheral region may have a top surface and a base. The peripheral region may include a number of bodies spaced apart by slits which extend from the periphery of the peripheral region toward the central region. The delivery device may further comprise an adhesive coupled to at least a part of the main body. The delivery device may further comprise a collapsible reservoir coupled to the main body and to at least one delivery sharp.

A delivery device may comprise a main body. The main body may comprise a peripheral region. The main body may further comprise a central region extending proud of the peripheral region. The peripheral region may have a top surface and a base. The peripheral region may include a number of bodies spaced apart by slits which extend from the periphery of the peripheral region toward the central region. The delivery device may further comprise an adhesive coupled to at least a part of the main body. The delivery device may further comprise a collapsible reservoir coupled to the main body and to at least one delivery sharp.

A disclosed drip chamber for an intravenous (IV) therapy system includes a container configured to hold an IV fluid, a drop former suspended over the container, and an inlet port disposed above the drop former and configured to receive the IV fluid from a reservoir. The drop former has an upper end, a lower tip, and an outer surface extending between the upper end and the lower tip. The inlet port is coupled to the outer surface to permit the IV fluid to descend down the outer surface.

A disclosed drip chamber for an intravenous (IV) therapy system includes a container configured to hold an IV fluid, a drop former suspended over the container, and an inlet port disposed above the drop former and configured to receive the IV fluid from a reservoir. The drop former has an upper end, a lower tip, and an outer surface extending between the upper end and the lower tip. The inlet port is coupled to the outer surface to permit the IV fluid to descend down the outer surface.

An auto-injector may include a housing having a longitudinal axis and a transverse axis, the housing having a shorter dimension along the transverse axis than along the longitudinal axis, wherein the transverse axis is perpendicular to the longitudinal axis; a flowpath having a first end and a second end; and a container enclosing a first fluid, the container extending from a first end toward a second end along or parallel to the longitudinal axis and being movable from a first position to a second position along or parallel to the longitudinal axis, the container being fluidly isolated from the flowpath in the first position and fluidly connected to the flowpath in the second position.