RecruitingDevice studyAcoArt Litos PCB Below-the-knee Global TrialThe objective of this study is to assess whether efficacy of the AcoArt Litos PCB is superior and whether safety of AcoArt Litos PCB is noninferior to the control device (FDA cleared PTA Balloon Catheter) regarding treatment of obstructions in the infrapopliteal arteries (located distal to the P3 segment of the popliteal artery and extending to the tibiotalar joint) in patients presenting with chronic limb-threatening ischemia (CLTI)(Rutherford 4-5)