Figure 2.

— Basic operating principle of our “capture-recapture mechanism” (CRM) connecting device. For a better appreciation of the mechanism of pin capture and recapture, cross-sections of the main CRM steps are shown. Center: A front view of the handle connected to the disposable unit before the start of the peritoneal dialysis cycle. Steps 1,2: The pin is captured and safely sequestered by the disposable unit. Pushing the handle toward the disposable unit (Step 1, directional arrow) and then releasing it (Step 2, directional arrow) removes the pin from the handle and secures it firmly to the housing of the disposable unit. Steps 3-5: Drain and fill procedures (described in detail in Figure 1). Step 6: Operating the handle (directional arrows) captures a new pin, present in the disposable unit. The cross-sections show the old pin being sequestered in the disposable unit and the new pin being captured. Step 7: A front view of the handle disconnected from the disposable unit at the end of the peritoneal dialysis cycle.