Pump set and pump with electromagnetic radiation operated interlock
First Claim
1. A medical pump for pumping fluid through a pump set loaded therein, said pump set being adapted for modifying electromagnetic radiation transmitted therethrough when properly loaded in the medical pump, said medical pump comprising:
- an emitter for emitting electromagnetic radiation having a predetermined wavelength;
a detector for receiving electromagnetic radiation and providing a detector signal representative of the electromagnetic radiation received by the detector, said electromagnetic radiation received by the detector including the electromagnetic radiation having the predetermined wavelength emitted by the emitter and electromagnetic radiation having at least one wavelength other than the predetermined wavelength;
a filter circuit for filtering the detector signal provided by the detector into a portion of the detector signal representative of the electromagnetic radiation having the wavelength other than the predetermined wavelength and into another portion of the detector signal representative of the electromagnetic radiation having the predetermined wavelength, said filter circuit providing an output signal representative of the portion of the filtered detector signal representative of the electromagnetic radiation having the wavelength other than the predetermined wavelength; and
a controller for determining that a compatible pump set is properly loaded in the pump when the output signal is below a threshold and when the other portion of the detector signal represents that the electromagnetic radiation having the predetermined wavelength is not detected, said controller being configured to enable the pump for pumping when the compatible pump set is properly loaded in the pump.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical pump including an electromagnetic emitter and detector is provided. The emitter emits electromagnetic radiation of a predetermined wavelength. A pump set that is compatible with the medical pump modifies the emitted electromagnetic radiation when properly installed in the pump. The detector receives electromagnetic radiation, and a filter circuit excludes electromagnetic radiation having a wavelength other than the predetermined wavelength. The pump monitors the filtered signal to determine whether the received electromagnetic radiation corresponds to the emitted electromagnetic radiation as modified by a properly loaded, compatible pump set and determines whether a compatible pump set is properly loaded in the pump as a function thereof.
183 Citations
17 Claims
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1. A medical pump for pumping fluid through a pump set loaded therein, said pump set being adapted for modifying electromagnetic radiation transmitted therethrough when properly loaded in the medical pump, said medical pump comprising:
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an emitter for emitting electromagnetic radiation having a predetermined wavelength; a detector for receiving electromagnetic radiation and providing a detector signal representative of the electromagnetic radiation received by the detector, said electromagnetic radiation received by the detector including the electromagnetic radiation having the predetermined wavelength emitted by the emitter and electromagnetic radiation having at least one wavelength other than the predetermined wavelength; a filter circuit for filtering the detector signal provided by the detector into a portion of the detector signal representative of the electromagnetic radiation having the wavelength other than the predetermined wavelength and into another portion of the detector signal representative of the electromagnetic radiation having the predetermined wavelength, said filter circuit providing an output signal representative of the portion of the filtered detector signal representative of the electromagnetic radiation having the wavelength other than the predetermined wavelength; and a controller for determining that a compatible pump set is properly loaded in the pump when the output signal is below a threshold and when the other portion of the detector signal represents that the electromagnetic radiation having the predetermined wavelength is not detected, said controller being configured to enable the pump for pumping when the compatible pump set is properly loaded in the pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining whether a compatible pump set is properly loaded in a medical pump, said pump set modifying electromagnetic radiation transmitted therethrough when properly loaded in the pump, said method comprising:
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emitting, by an emitter of the pump, pulses of electromagnetic radiation through a portion of a pump set loaded in the pump, said electromagnetic radiation having a predetermined wavelength and being pulsed at a predetermined frequency; receiving electromagnetic radiation at a detector of the pump, said electromagnetic radiation received at the detector including the electromagnetic radiation having the predetermined wavelength and electromagnetic radiation having at least one wavelength other than the predetermined wavelength, wherein the detector provides a detector signal representative of the received electromagnetic radiation; filtering, via a filter circuit of the pump, the detector signal into a portion representative of the pulses of electromagnetic radiation having the predetermined frequency and the predetermined wavelength and into another portion representative of the electromagnetic radiation having the at least one other wavelength, said filter circuit providing an output signal representative of the intensity of the other portion representative of the electromagnetic radiation having the at least one other wavelength received by the detector; comparing the output signal to a threshold; determining whether the portion of the detector signal representative of the pulses of electromagnetic radiation having the predetermined frequency and the predetermined wavelength is detectable; and determining whether the pump set is compatible with the pump and properly loaded in the pump as a function of said comparing when the other portion of the detector signal represents that the electromagnetic radiation having the predetermined wavelength is not detected. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A medical pump for pumping fluid through a pump set loaded therein, said pump set comprising a safety interlock device that is transmissive to IR electromagnetic radiation and substantially opaque to visible light, said medical pump comprising:
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an infrared (IR) emitter for emitting pulses of IR electromagnetic radiation, said IR electromagnetic radiation having a predetermined wavelength and said pulses having a predetermined frequency; an IR detector for receiving electromagnetic radiation and providing an IR detector signal representative of the received electromagnetic radiation; a filter circuit for filtering the IR detector signal provided by the IR detector to exclude frequencies other than the predetermined frequency of the pulses of IR electromagnetic radiation having the predetermined wavelength, said filtered IR detector signal being representative of the intensity of the IR electromagnetic radiation transmitted through the safety interlock device and received by the IR detector; a visible light emitter for emitting visible light having at least one wavelength other than the predetermined wavelength; a visible light detector for receiving electromagnetic radiation and providing a visible light detector signal representative of the received electromagnetic radiation; and a controller for determining that a compatible pump set is properly loaded in the pump when the filtered IR detector signal indicates that the IR detector received the pulses of IR electromagnetic radiation having the predetermined wavelength emitted by the IR emitter and transmitted through the safety interlock device and when the visible light detector signal indicates that the safety interlock device blocked the visible light detector from receiving the visible light emitted by the visible light emitter, said controller being configured to enable the pump for pumping when the compatible pump set is properly loaded in the pump.
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17. A method of determining whether a compatible pump set is properly loaded in a medical pump, said pump set modifying electromagnetic radiation transmitted therethrough when properly loaded in the pump, said method comprising:
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emitting, by an emitter of the pump, infrared (IR) electromagnetic radiation having a predetermined wavelength through a portion of a pump set loaded in the pump; detecting, by a detector of the pump, electromagnetic radiation including IR electromagnetic radiation having the predetermined wavelength and visible light having at least one wavelength other than the predetermined wavelength, wherein the detector provides a detector signal representative of the detected electromagnetic radiation; filtering, by a filter circuit of the pump, the detector signal to exclude a portion of the detector signal representative of the visible light having the at least one wavelength other than the predetermined wavelength from another portion of the detector signal representative of the IR electromagnetic radiation having the predetermined wavelength, said filter circuit providing an output signal representative of the filtered detector signal; comparing the output signal to an IR threshold to determine whether the emitted IR electromagnetic radiation has been transmitted through the pump set; comparing the output signal to a visible light threshold to determine whether the pump set has substantially blocked visible light from the detector; and determining that the pump set is compatible with the pump and properly loaded in the pump as a function of said comparing when the IR electromagnetic radiation detected by the detector exceeds the IR threshold and the visible light detected by the detector does not exceed the visible light threshold.
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Specification