Rinsability of Orthophthalaldehyde from Endoscopes

Table 3

Zones of Inhibition (ZOI) of S. aureus on Viton bending rubber and endoscope insertion tubes after exposure to OPA for 10 minutes, followed by three 100 mL rinses and various drying times. The numbers reported are the mean ± standard deviation of three replicates in mm.

Drying times	OPA @ 25°C
	Viton bending rubber; ZOI (mm)	Colonoscope insertion tube; ZOI (mm)
Not dried	8±0
1.0 hr	4±3.5
2.0 hrs	0±0	13±1
6.0 hrs		12±3.2
Overnight		0±0