Desired rates of fluid flow may also be set in such system when the apparatus is included in the system. Such apparatus is manually adjustable to vary the rate of such fluid flow. Control means provide alternately for a blocking of the second pair of lines and an opening of the first pair of lines and at other times for a blocking of the first pair of lines and an opening of the second pair of lines.Īpparatus is included in a system for controlling the flow of intravenous fluid from a source to a patient. One of the lines in a second pair communicates with the input line and the second compartment and the other line in the second pair communicates with the first compartment and the output line. One of the lines in a first pair communicates with the input line and the first compartment and the other line in the first pair communicates with the second compartment and the output line. Input and output lines are provided in the block. The transducer may include a coil disposed on the block and a magnetic rod magnetically coupled to the coil and movable with the separating means to vary the inductance of the coil. A transducer is movable with the separating means. Separating means such as a diaphragm are movable in the chamber to define first and second compartments each having a variable volume in accordance with such movement. It includes a block and a chamber in the block. In the second mode (controller mode), the device is programmed to alarm and cease operation when there is no differential between fluid pressure upstream and downstream from the gauge assembly.Ī cassette provides for a controlled introduction of fluid from a source to a patient. In the first mode (pump mode), the device is programmed to alarm and cease operation when fluid pressure downstream from the gauge assembly reaches a preselected value. tube upstream and downstream from the gauge assembly. The strain gauge assembly is positioned relative to the device's peristaltic means to alternately monitor fluid pressure in a patent I. tube as an indication of fluid pressure changes in the tube. tube is a pressure sensing strain gauge assembly that monitors dimensional changes in the outer diameter of the I. Included in the device and associated with the I. In a first mode of operation, the device functions as a peristaltic pump and in the second mode of operation it functions like a controller. The operation of the sensing means causes an output indicator to be energized.Ī dual mode peristaltic device is provided for infusing I. When the pressure of the fluid in the output line reaches a particular value, the actuating arm becomes displaced through a particular distance to operate sensing means external to the disposable unit. Actuatable means such as an actuatable arm is disposed in the disposable unit and is captured in the conduit means and is positioned in abutting relationship with the diaphragm for movement with the diaphragm. The resilient means expand or contract in accordance with the pressure of the fluid in the outlet line. Resilient means such as diaphragm are disposed in the conduit means in the disposable unit. The disposable unit includes detent means cooperative with detent means in the pump to hold the disposable unit in releasable relationship with the pump. This arrangement includes conduit means, such as inlet and outlet lines, which extend from the pump to the receiver and which are included in a disposable unit. Apparatus is provided for assuring that fluid is introduced from a pump to a receiver, such as a patient, at a controlled and safe pressure.
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