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Fluid infusion line monitor

  • US 5,139,482 A
  • Filed: 07/25/1991
  • Issued: 08/18/1992
  • Est. Priority Date: 01/18/1990
  • Status: Expired due to Fees
First Claim
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1. An apparatus for signalling an alarm condition in a patient'"'"'s fluid catheter line, comprising:

  • (a) a sensor assembly for connection to the catheter line, comprising;

    (i) a housing having a passage therein for receiving a portion of the line, the passage having a side opening laterally inserting the line;

    (ii) means for retaining the portion of the line in a fixed position with the passage, comprising a ring-shaped clamp member for selectively clamping the line relative to the housing at spaced apart clamp contact locations on the line proximate opposite ends of the passage, the line being visible through the clamp member for monitoring a desired positioning of the line within the passage;

    (iii) a radiation source;

    (iv) means for directing the radiation from the source through the opening for intersecting the line; and

    (v) a radiation detector in the housing for receiving radiation that is transmitted from the source through the line; and

    (b) circuit means for connecting to the sensor assembly, comprising;

    (i) a source of electrical power;

    (ii) means for producing a reference voltage;

    (iii) means for producing a sensor signal, the sensor signal being indicative of the radiation received by the detector; and

    (iv) means for producing an alarm signal when the sensor signal is in a predetermined relationship with the reference signal.

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