Theory 046/Medicine & Health /Critical care
Sepsis Is a Leak, Not a Storm
Sepsis is described as a cytokine storm. The collapse may be a plumbing failure downstream of it.
Septic shock is driven by a threshold loss of endothelial barrier integrity rather than by cytokine amplitude, so the transition to shock should follow a permeability measure and be reversible before the barrier fails.
01The evidence
Cytokine-directed therapies have failed in sepsis despite clear elevation of cytokines, while fluid and vasopressor management remains the mainstay.
02The tension
The storm model predicts that blocking cytokines should help, and it does not. The failure is usually attributed to timing rather than to the wrong target.
03The mechanism
Capillary leak determines whether volume can be retained. A threshold loss of glycocalyx and junctional integrity produces a shift from distributive to permeability-driven shock that vasopressors cannot compensate.
That makes barrier integrity the state variable, and predicts that permeability markers should predict the transition better than cytokine levels.
04What this is not
Storm models target mediators. This targets the barrier, which explains the failure of mediator blockade.
05Predictions
- P1Permeability should predict shock better than cytokines.
- P2Barrier protection should prevent the transition.
- P3Mediator blockade without barrier effect should not help.
06Refutation
Shock tracking cytokine levels at controlled permeability would restore the storm model.
07What it changes
It would redirect sepsis therapy to the endothelium.