Syringe pumps

Details Syringe pumps Syringe pumps

A - Human Necessities

61

M

A61M 5/145 (2006.01)

Patent

CA 2354769

Conventional syringe pumps have a motor rotating a leadscrew, which drives a plunger head retainer to push a plunger along the barrel of a syringe so as to dispense medication to a patient. A force sensor in the head retainer measures the force on the plunger to detect when there is an occlusion restricting flow of medication and sounds an alarm. In the present invention, the motor is reversed to reduce the force to about 10% of that at which the occlusion is detected. The occlusion can be removed with a reduced risk of a bolus of medication being dispensed after which the user restarts the pump so that the plunger is driven normally.

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