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Table 1 Summary of scopes and samples tested for Clinical-use and Simulated-use evaluations

From: EVOTECH® endoscope cleaner and reprocessor (ECR) simulated-use and clinical-use evaluation of cleaning efficacy

Site Colonoscope Gastroscope Bronchoscope Duodenoscope
  (N = 20)** (N = 20)** (N = 15)** (N = 20)**
Clinical-use Testing:
Surface     
S1 (insertion tube*)
S2 (control head*)
L1: Suction biopsy channel (umbilical to distal end)
  [364.5 cm 2 ] 1 [255.7 cm 2 ] [53.2 (or 58.7) cm 2 ] [402 cm 2 ]
L2: Air/water channel (umbilical to distal end)  
  [377 cm 2 ] [ 269 (or 254) cm 2 ]   [363 cm 2 ]
L3: Auxiliary water channel    
  [175.3 cm 2 ]    
L4 Elevator wire channel    
     [43.4 cm 2 ]
Samples collected per endoscope 5 4 3 5
Simulated-use Testing; each scope type tested in triplicate***
Site Colonoscope Gastroscope Bronchoscope Duodenoscope
  (N = 3) Not done (N = 3) (N = 3)
Surface     
S1 (insertion tube)****  
S2 (control head)****  
L1: Suction biopsy channel (From umbilical to distal end)  
  [358.7 cm 2 ]   [53.2 cm 2 ] [307.5 cm 2 ]
L2: Air/water channel (From umbilical to distal end)   
  [345 cm 2 ]    [213.9 cm 2 ]
L4 Elevator wire channel    
     [34 cm 2 ]
Samples per scope 4   3 5
  1. * Surface area sampled was 1 cm2 for each site
  2. ** Clinical use testing: Colonoscope, Gastroscope and Duodenoscope: 15 tested after cleaning only, 5 tested after cleaning and HLD, Bronchoscope: 10 tested after cleaning only, 5 tested after cleaning and HLD
  3. *** Simulated use testing: Colonoscope, Bronchoscope and Duodenoscope: positive and negative controls as well as ECR cleaning was tested for each scope type in triplicate.
  4. **** Surface area inoculated and sampled was 1 cm2 for each site
  5. 1 The calculated surface area was determined using the manufacturer's published lumen diameter and the length of the channel as determined by threading a fishing wire down the channel lumen and measuring the length. Where two values are stated these refer to the two different scope models used for this study.