The Shockwave S4 Intravascular Lithotripsy (IVL) Catheter consists of an array of miniaturized lithotripsy emitters, located inside a balloon, that generate acoustic pressure waves within the target treatment site, disrupting calcium within the lesion and allowing subsequent dilation of a peripheral artery stenosis using low balloon pressure. Two radiopaque marker bands inside the balloon aid in positioning. The distal catheter and balloon are hydrophilic coated to increase lubricity. The proximal hub has three ports: one for inflation/deflation of the balloon with 50/50 saline/contrast medium, one for the ‘Over-the-wire’ (OTW) guidewire lumen, and one for connection to the IVL Connector Cable (and IVL Generator).