Pressure–Flow Coherence, Tensegrity, and DPF in Biological Systems, Lantern of Sulfur, Convergence Series, v12, May 2026

This preprint is part of the Lantern of Sulfur (LoS), Vertical Terrain Axis — Convergence Series. This paper reframes biological regulation as a pressure–flow system governed by the capacity to distribute load across interconnected exits, vascular interfaces, tissue interfaces, renal-electrolyte pathways, respiratory compensation, metabolic clearance, bile flow, and buffering systems. The paper proposes that Directional Pressure Failure (DPF) occurs when load can no longer distribute coherently across available pathways. In this state, pressure localizes, flow becomes directional, downstream systems continue executing, and regulation may remain active while global resolution fails. Within the Lantern of Sulfur framework, this paper functions as a mechanistic bridge explaining how systems may remain adaptive, responsive, and locally coherent while still failing to return to whole-system coherence. It integrates tensegrity principles, hydration dynamics, bile flow, buffering capacity, vascular tone, RAAS interpretation, renal execution, chloride-dominant terrain, hyperchloremia, NAGMA, and cardiac strain. The central claim is that correct local execution can occur within a globally distorted pressure–flow field. Kidney behavior, RAAS activation, vascular instability, renal electrolyte shifts, and cardiac strain may be locally appropriate responses to distorted upstream conditions, even while the larger system fails to resolve. The paper also introduces the sequencing principle “coherence before capacity,” arguing that constrained systems may not improve simply by increasing load, intensity, or capacity demands. The deeper question is not only what the system can tolerate, but whether it can distribute the load without fragmenting. This work is presented as a conceptual systems-physiology model intended to generate testable hypotheses and improve pattern recognition. It is not a treatment protocol and should not be used as a substitute for individualized medical care. For the complete Lantern of Sulfur framework, reading order, and updated convergence dynamics materials, see the Lantern of Sulfur Master Index (Concept DOI): https://doi.org/10.5281/zenodo.17915492