Test packs. Making your own vs. buying commercially.
D002495:Central Supply, Hospital / Q000191:economics*; D003365:Costs and Cost Analysis; D004868:Equipment Failure; D005069:Evaluation Studies as Topic / Q000191:economics*; D011358:Product Surveillance, Postmarketing / Q000191:economics*; D013242:Sterilization / Q000295:instrumentation*