A dilation catheter system is provided to dilate the ostium of a paranasal sinus; or to dilate some other anatomical passageway (e.g., within the ear, nose, or throat, etc.). The dilation catheter system may include a dilation catheter, a dilator, a guide catheter, and an inflator. The dilation catheter may be positioned between the dilator and the inflator. The guide catheter may be inserted within the affected passageway to allow the dilator to be positioned through the guide catheter and into the affected passageway. The inflator may then be actuated to transfer fluid from the inflator, through the dilation catheter, and into the dilator. The transfer of fluid may inflate the dilator to an expanded state to open or dilate the affected passageway.

A spring assembly for an administering device includes a driving spring configured as a spiral spring and a spring shaft. An inner end of the spring is rotationally fixedly attached to the spring shaft. A spring sleeve extends around the circumferential region of the spring, wherein the outer end of the spring is connected to the spring sleeve in a rotationally fixed manner and a disk-type spring-sleeve cover is attached to the spring sleeve or the spring shaft. The flange and the spring-sleeve cover extend radially away from an axis of the spring shaft and the flange is arranged near a distal end of the spring shaft. A radial stop is arranged on the flange periphery, and a blocking element is arranged on the spring sleeve to be complementary to the radial stop for releasably rotationally securing to each other when the blocking element and the radial stop engage.

The coupling between the plunger and the piston can be removable. The removal of the plunger can form a split syringe, which can be used for ease of transport. The split syringe can be mounted on a print head for printing using a 3D printer.

An autoinjector includes a case adapted to hold a medicament container having a needle, a needle shroud slidably disposed in the case and translatable between an extended position relative to the case in which the needle is covered and a retracted position relative to the case in which the needle is exposed, and a plunger slidably disposed in the case. The case includes a rib. The plunger includes a plunger boss adapted to abut the rib and the needle shroud when the needle shroud is in the extended position and disengage the rib when the needle shroud is in the retracted position to allow the plunger to translate axially relative to the case.

A therapeutic agent delivery system (10) includes a housing (16) and a drive wheel (38) rotatably carried by the housing. A plunger rod (50) may be rotatable with the drive wheel relative to the housing from a first rotational configuration to a second rotational configuration. The plunger rod may be translatable relative to the housing from a first translational configuration to a second translational configuration. A plunger restraint (58) may maintain the plunger rod in the first translational configuration when the plunger rod is disposed in the first rotational configuration. The plunger restraint may permit the plunger rod to translate to the second translational configuration when the plunger rod is disposed in the second rotational configuration. A needle may move from a stowed configuration to a deployed configuration by the plunger rod when the plunger rod moves from the first translational configuration to the second translational configuration.

A syringe is provided that includes a tubular body having a top end and a bottom end; a barrel portion having an orifice at a top end of the barrel portion for dispensing a fluid, the tubular body rotatably coupled to the top end of the tubular body; and a plunger body disposed within a bore of the barrel portion and within the tubular body, the plunger body includes a threaded portion that engages threads within the tubular body that cause the plunger body to move vertically within the bore of the barrel between a retracted position and a fully extended position with a twisting of the barrel portion.

Various handheld medical dispensing configurations and methods including the following: Handheld medical dispensing system comprises a syringe, which has a plunger, releasably mounted to syringe actuation apparatus, the apparatus having an actuator configured such that it can move the plunger more than once to dispense a plurality of amounts of substance from the syringe. A method of dispensing fluid from a syringe comprises holding a medical substance delivery system including a syringe, which has a needle, and which is secured to syringe actuation apparatus configured to dispense predetermined amounts of the substance from the syringe, penetrating the needle at one patient site and using the apparatus to deliver a predetermined amount of the substance, and penetrating the needle at another patient site and using the apparatus to deliver a predetermined amount of the substance.

A rotatable drive mechanism for a drug delivery device may include a lead screw having a distal end, a proximal end, and external threads, a bearing, and a ball screw driver having a threaded aperture wherein the threaded aperture is configured to rotatably engage with the external threads of the lead screw. The mechanism may further include a biasing device disposed between the bearing and the ball screw driver generating an axial drive force, and an activation device configured to release the biasing device and allowing the biasing device to expand from a compressed position to an extended position through which the axial drive force of the biasing device causes the ball screw driver to axially move toward the distal end of the lead screw and rotate the lead screw such that a threaded engagement between the lead screw and the ball screw driver bears the axial drive force.

A medical injection device, comprising: a housing having a first end cover and a second end cover provided at two ends thereof, respectively; a dial threaded rod, which is in threaded connected to the first end cover; and, a piston rod, which is used for expelling a dose, an upper end of the piston rod being connected to the dial threaded rod through a driving mechanism while a lower end thereof is in threaded connected to the second end cover. It further comprises a dosage adjustment mechanism, which is arranged between the dial threaded rod and the housing and used for driving the dial threaded rod to move in an axial direction of the housing.

A suction device configured to simultaneously draw in fluid and expel fluid. The suction device may comprise a barrel defining a cavity and extending from a first end to a second end. A first fluid inlet may be adjacent the first end of the barrel and a second fluid inlet adjacent the second end of the barrel and a first fluid outlet may be adjacent the first end of the barrel and a second fluid outlet adjacent the second end of the barrel. A plunger may be slideably disposed within the cavity of the barrel with a handle assembly operably coupled thereto. A actuation of the handle assembly may be configured to move the plunger within the cavity between the first end and the second end of the barrel.