Figure 1
From: A hands-free stool sampling system for monitoring intestinal health and disease
(A) An illustration of the prototype connected to a rear exit toilet. (B) Close-up view of the bottom part of the prototype shown in (A). (C) Picture of the prototype connected to a bottom exit toilet with endoscope connected to a laptop for image collection. (D) Operating principle of the system including 4 valves, V1 through V4, and I = inspection and venting port. 1. The valve position for regular operation of the toilet, blue arrow indicates water flush direction from toilet to sewer line. 2. The stool is immobilized in the stool area (red dashed rectangle). 3. A spray-jet of buffer erodes specimen collected by gravity through V4. 4. The stool is flushed to sewer.
