Abstract: An overload protection method and apparatus for a medicament syringe pump force sensor. A dome switch is employed with force sensor components of a medicament pump. The dome switch collapses at overload pressures, isolating the force sensor from pump driving forces that exceed the force sensor limit. An alarm signal can be triggered by the overload, and initiate pump shut down.

Abstract: An overload protection method and apparatus for a medicament syringe pump force sensor. A dome switch is employed with force sensor components of a medicament pump. The dome switch collapses at overload pressures, isolating the force sensor from pump driving forces that exceed the force sensor limit. An alarm signal can be triggered by the overload, and initiate pump shut down.

Abstract: A gas flow sensor (1), such as for a respiratory tube (120) or a convective warming blanket (40), includes a stiff, flexible rectangular substrate (10) supporting a piezoelectric element (11). The substrate (10) is mounted at its downstream end (15) and aligned in the gas flow (2) so that its free end (16) is vibrated up and down by gas flow. This flexes the substrate (10) and the piezoelectric element (11) so that it provides an alternating output to a processor (20) with an amplitude dependent on the rate of gas flow. The processor (20) provides an output to a display (3) indicative of the gas flow rate.