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1. An inflatable bladder cast liner comprising: a main inflatable bladder with four edges and two sides, adapted for wrapping around a fractured limb as a cast liner; the main inflatable bladder comprising four edges, two circumferential edges configured for wrapping about the fractured limb axis and two longitudinal edges configured to extend about a length of the fractured limb skin parallel with the fractured limb axis; the two longitudinal edges coupled to and bounding the main bladder having two surface sides, a cast side and the fractured limb adjacent side; each of the inflatable bladder two longitudinal edges with mating connectors extending parallel to the fractured limb axis for coupling the inflatable bladder air-tightly about a more-or-less tapered cylindrical the fractured limb skin; the two circumferential edges, circumferential edge 1 and circumferential edge2, wrapped about the fractured limb axis, forming an air-tight bladder, each circumferential edge coupled to the main inflatable bladder forming an adjustable air-tight seal with the fractured limb skin; the main inflatable bladder having the fractured limb skin side having an array of nipples protruding from the main bladder fractured limb adjacent side toward and in contact with the fractured limb skin; the longitudinal edge 1 contiguous with and coupled to an inflatable circumferential edge bladder wrapped about the fractured limb axis forming an adjustable air-tight seal at the longitudinal edge 1; an external air pump coupled with flexible tubing to the main inflatable bladder and circumferential edge1 inflatable bladders providing pressurized air to the main and circumferential edge1 bladders; an external air pump mode switch controller for directing air flow to either the main inflatable bladder or at both the main inflatable bladder and at least one circumferential edge bladder, the external air pump mode switch controlling a flutter valve automatically fluctuating main inflatable bladder air-flow to ventilate and massage the fractured limb skin; whereby the main inflatable bladders working in sync with the air pressure controller provide bladder air for static pressure stabilizing a cast and also adjustably for air ventilation over the fractured limb skin selectably.
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