Directly engaged syringe driver system

A syringe driver system for expelling fluid from a syringe body, the syringe driver comprising:

• a rotatable threaded shaft;
• a plunger adapted to directly engage the threaded shaft such that rotation of the shaft drives the plunger into the syringe body;
• a guide system to secure the plunger in direct engagement with the threaded shaft, the guide system comprising a first guiding element running substantially parallel to the threaded shaft and a second guiding element carried by the plunger at a position substantially opposite the position at which the plunger engages the threaded shaft such that the first and second guiding elements engage;
• wherein the plunger comprises an elongate arm positioned substantially opposite the position at which the plunger is engaged with the threaded shaft and the first guiding element comprises the arm and the second guiding element comprises a bifurcated element for straddling the arm.

A syringe driver system for expelling fluid from a syringe body, the syringe driver comprising:

• a rotatable threaded shaft;
• and
• a plunger adapted to directly engage the threaded shaft such that rotation of the shaft drives the plunger into the syringe body, the plunger comprising a plurality of markings adapted to indicate the movement and position of the plunger within the syringe body;
• and
• a detection system having a light source and a plurality of detectors, the detection system positioned adjacent a portion of the plunger on which the markings are located such that the light source is on one side of the portion of the plunger and the plurality of detectors is on the opposite side of the portion of the plunger;
• wherein the markings on the portion of the plunger at a near end of infusion (NEOI) point of the syringe have a first size and the markings elsewhere on the portion of the plunger have a second size different than the first size such that the markings at the NEOI point allow illumination of a first number of the detectors and the markings elsewhere allow illumination of a second number of detectors different than the first number of detectors.

A syringe driver system for expelling fluid from a syringe body, the system comprising:

• a syringe body having a distal end, a proximal end, and a side wall, the syringe body formed with a nozzle end at the distal end;
• a rotatable threaded shaft;
• and
• a plunger having a stopper and a plunger flange interconnected by a plunger stem, the plunger flange extending radially outwardly from the plunger stem and adapted to directly engage the threaded shaft such that rotation of the shaft drives the plunger into the syringe body, the plunger comprising a plurality of markings adapted to indicate the movement and position of the plunger within the syringe body.

A syringe driver system for expelling fluid from a syringe body, the system comprising:

• a syringe body having a distal end, a proximal end, and a side wall, the syringe body formed with a nozzle end at the distal end;
• a rotatable threaded shaft;
• and
• a plunger having a stopper and a plunger flange interconnected by a plunger stem, the plunger flange extending radially outwardly from the plunger stem and adapted to directly engage the threaded shaft such that rotation of the shaft drives the plunger into the syringe body, the plunger including a marker indicative of the position of the plunger;
• and
• a detector positioned so as to interact with the marker and provide a signal indicative of the position of the marker.

A syringe driver system for expelling fluid from a syringe having a syringe body, the syringe having a syringe identification marking indicative of a characteristic of the syringe, the system comprising:

• a syringe body having a distal end, a proximal end, and a side wall, the syringe body formed with a nozzle end at the distal end;
• a rotatable threaded shaft;
• a plunger having a stopper and a plunger flange interconnected by a plunger stem, the plunger flange extending radially outwardly from the plunger stem and adapted to directly engage the threaded shaft such that rotation of the shaft drives the plunger into the syringe body;
• and
• a syringe detection system including a detector for detecting the identification marking of the syringe, the syringe detection system adapted to provide a signal in accordance with the identification marking detected.