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. 2022 May 15;18(1):83–90. doi: 10.4244/EIJ-D-21-00824

Figure 5. The "melon seed effect" and design of the POT balloon.

Figure 5

Mechanism of the “melon seed effect” of the POT balloon (A1-A3) and demonstration of the conical tip of a balloon catheter as compared to balloon marker (white arrow) (B). Red arrows indicate the proximal migration of the distal balloon edge. Grey arrows indicate the resulting separation of the stent struts at the level of the junction between pMB and dMB (corresponding to the carina in vivo). dMB: distal main branch; pMB: proximal main branch; POT: proximal optimisation technique