PMC4604746_01
Upper panel - situation after removal of the knotted catheter. Lower panel - the knotted catheter in greater detail, marks on the catheter are one cm apart.
IPRS-04-04-g-001.jpg
PMC4604746_01_IPRS-04-04-g-001.jpg
F1
After removal of the intact catheter, inspection revealed a true knot six centimeters away from the catheter tip (Figure 1 (Fig. 1)).