초록 ▼

A piston-type infusion pump is provided having an improved method of occlusion detection. The infusion pump includes processing circuitry for controlling the drive mechanism to infuse medication to a patient, including a sensor to track the position of the syringe plunger, thereby metering the amoun

A piston-type infusion pump is provided having an improved method of occlusion detection. The infusion pump includes processing circuitry for controlling the drive mechanism to infuse medication to a patient, including a sensor to track the position of the syringe plunger, thereby metering the amount of medication dispensed to the patient. The processing circuitry also includes a force sensor for providing signals indicative of the presence of occlusions along the infusion path. The operation of the drive mechanism causes delivery of medication to the patient. The infusion pump is constructed to be watertight.

대표청구항 ▼

1. An infusion pump for dispensing volumetrically proportioned doses of pharmaceutical product to a subject by way of an infusion path, the infusion path being adapted to connect the pump intravenously or subcutaneously to the subject, the pump including a power source, motor and processor, the proc

1. An infusion pump for dispensing volumetrically proportioned doses of pharmaceutical product to a subject by way of an infusion path, the infusion path being adapted to connect the pump intravenously or subcutaneously to the subject, the pump including a power source, motor and processor, the processor selectively controlling the motor to dispense the volumetrically proportioned doses of pharmaceutical product along the infusion path, the infusion pump comprising:a housing; a pharmaceutical storage area formed in the interior of the housing, said storage area including a first aperture formed in a wall of the housing; a pump door connected to said housing for accessing the storage area of said housing, the pump door including a second aperture for accessing said first aperture through said pump door; a latch movable between a first position and a second position for securing the pump door to the housing in said second position, the latch including a stem extending into the housing along a latching axis, the stem including a lever section rotating upon movement of the latch between said first and second positions; a pharmaceutical cartridge for containing a supply of medication, said cartridge having a dispensing tip and a plunger, said plunger provided to urge the medication of the cartridge in the direction of the dispensing tip, the cartridge positioned in said storage area such that the dispensing tip is in registry with said first aperture for connection to the infusion path for dispensing pharmaceutical product thereto, said plunger extending along a drive axis, the drive axis being parallel to the latching axis; a lead screw positioned along the drive axis, the lead screw operably linked to the motor and including a slide to operatively engage said plunger, the lead screw rotated by the motor when said motor is actuated by the processor; and a pivotable drive nut positioned in operative relation to the lever section and for engaging the slide with the lead screw, the drive nut including a tab portion for engaging said lever section, whereby movement of the latch to the second position to secure the pump door to the housing upon installation of the cartridge rotates the lever section to move said drive nut to threadedly engage the lead screw, and upon rotation of the lead screw the drive nut is moved against the slide to incrementally urge the plunger for dispensing volumetrically proportioned doses of medication along the infusion path.