Such a flow sensor may comprise a positive displacement flow sensor (402) constructed using micro-fabrication and/or micro-molding techniques.

A blood flow signal is obtained by a flow detector.

The user feedback unit is in electrical communication with each of the pressure sensor and the flow sensor.

An intake air flow rate detector (2) detects the flow rate in the intake air passage (4).

The apparatus (2) can further be provided with a pulsation (13) and saturation sensor and a respiratory flow sensor.

A flow detector (130,140,142) determines when aspirate flow has ceased.

In addition, the flow sensor includes an electromagnetic coil (122) operative to generate a magnetic field within the fluid flow.

The present invention also relates to a method for measuring mass flow using the mass-flow sensor (10) of the present invention.

A flow sensor can be disposed in the flow tube for measuring a flow rate of the fluid in the flow channel.

The flow rate and the volume of the first medication delivered to the patient are monitored by the flow sensor assembly while the injection occurs.

An assessment module provides an indication of the efficacy of the abaltion procedure based on the flow measurement from the flow sensor.

The method can be employed to form a capillary mass flow sensor system.

The control system includes at least one flow sensor sensing a flow rate of at least one of a recirculating exhaust gas, an inlet air and a combined result thereof, and generating a sensor signal indicative of the sensed flow rate.

A recirculation flow rate detector (15) detects the flow rate of exhaust gas recirculation in the exhaust gas recirculation passage (13).

A flow sensor (126,212) associated with the administration tube provides an indication of the actual flow rate (224) of fluid in the administration tube.