. 2016 May 4;9:258. doi: 10.1186/s13104-016-2066-7

Table 2.

Comparison of residual ATP detected in a soiled colonoscope instrument channel evaluated using various sample collection methods

Channel sample collection method^a	RLUs^b (standard deviation)	Protein μg/cm² (standard deviation)
Sponge direct^c	9304.2 (1028.6)	Not applicable
Sponge eluted (20 mL sample)	2511.4 (1142.1)	0.54 (0.14)
Flush only (20 mL sample)	2850.4 (1261.6)	26.66 (5.98)

^aData for each test parameter represents the average of five replicate endoscopes tested (N = 5)

^bATP was reported as relative light units (RLUs)

^cThe range of RLUS for the sponge direct collection method was 7709–9999 with three of the five replicates having RLU values of 9999 (i.e. maximum RLU value read by the luminometer). This 9999 maximum RLU value was used for the purposes of calculating the average and standard deviation recognizing that it was not an exact RLU value