Syringe pump

Details Syringe pump Syringe pump

A - Human Necessities

61

M

A61M 5/31 (2006.01) A61M 5/145 (2006.01)

Patent

CA 2307009

Conventional syringe pumps have a sensor mechanism to measure the size of the barrel of the syringe. In the present invention, an arm is swung against the barrel and coupled to a strip mask having a row of transparent apertures of differing length. The mask extends above a CCD array of sensing elements and below a concave mirror, which produces a collimated beam of radiation on the mask from an LED. The length of sensing elements exposed to radiation through an aperture in the mask gives an approximate indication of barrel size; the position of an edge of the aperture gives an accurate indication. The pump compares the barrel size with information relating size to syringe type and produces an indication of syringe type on a display.

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