Pump set for administering fluid with secure loading features and manufacture of component therefor

A pump set for use in a liquid delivery pump of the type for delivering liquid to a patient, having an infrared radiation detector for detecting infrared radiation, and providing an indication that the pump set is properly loaded on the pump, the pump set comprising:

• a conduit for the liquid;
• and
• a safety interlock member which is carried by the conduit, formed of a colorant-free plastic material which transmits infrared radiation and blocks visible light, and adapted for placement in a path of infrared radiation propagation toward the infrared radiation detector.

A pump set for use in a liquid delivery pump of the type for delivering liquid to a patient, having an infrared radiation detector for detecting infrared radiation, and providing an indication that the pump set is properly loaded on the pump, the pump set comprising:

• a conduit for the liquid;
• and
• a safety interlock member which transmits infrared radiation and blocks visible light, comprises a polymer having visible-light-absorbing polyenes, and is adapted for placement in a path of infrared radiation propagation toward the infrared radiation detector.

A pump set for use in a liquid delivery pump of the type for delivering liquid to a patient, having an infrared radiation detector for detecting infrared radiation, and providing an indication that the pump set is properly loaded on the pump, the pump set comprising:

• a conduit for the liquid;
• and
• a safety interlock member which transmits infrared radiation and blocks visible light, comprises a dehydrochlorinated polyvinyl chloride material, and is adapted for placement in a path of infrared radiation propagation toward the infrared radiation detector.

A safety interlock member which is adapted to be carried by a conduit of a pump set for use in a liquid delivery pump of the type for delivering liquid to a patient, having an infrared radiation detector for detecting infrared radiation, and providing an indication that the pump set is properly loaded on the pump, the safety interlock formed from a compositionally homogeneous material which transmits infrared radiation and blocks visible light, and being adapted for placement in a path of infrared radiation propagation toward the infrared radiation detector.

A method for forming a safety interlock member for a pump set for use with a pump to deliver a liquid to a patient comprising:

• forming the safety interlock member from polyvinyl chloride by a process selected from among molding, injection molding, and extruding;
• and
• exposing the polyvinyl chloride to a temperature above about 207° C. whereby the polyvinyl chloride undergoes dehydrochlorination and formation of visible-light-absorbing polyenes such that the safety interlock member transmits infrared radiation and blocks visible light.