Patent ID: 8536105

Claim:
A medical instrument cleaning concentrate having an active ingredient consisting essentially of (i) a biofilm permeation agent selected from the group consisting of sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, ammonium lauryl ether sulfate, sophorose biosurfactant, sodium lauroyl sarcosinate, triethanolamine lauroyl-L-glutamate, sodium myristyl sarcosinate, sodium dodecyl sulfate, potassium laurate, sodium dodecane sulfonate, and sodium lauryl ethoxysulfate and (ii) a single nonionic alkoxylated alcohol surfactant having an HLB ranging from about 5 to less than about 8, wherein a ratio of (i) to (ii) in the concentrate ranges from about 2:1 to about 5:1, and wherein a wash solution containing from about 6 to about 8 milliliters of the concentrate per from about 0.5 to about 2 liters of water leaves substantially no residual cleaning agents on the surfaces of the medical instruments subsequent to rinsing the instruments, and the concentrate is substantially devoid of a chelating agent.