Which intervention is crucial for a post-surgical patient at risk for developing edema?

Postoperative edema results from interstitial, fluid, accumulation, due to venous stasis, increased capillary permeability, inflammatory mediators, and reduced lymphatic drainage causing tissue swelling and impaired perfusion and healing process occurs. Rationale: A. Albumin administration increases plasma oncotic pressure and intravascular volume expansion. Albumin administration increases plasma oncotic pressure expanding intravascular volume. It may temporarily mobilize interstitial fluid back into circulation space. Routine use is not first line for postoperative edema management. Indicated only in hypoalbuminemia or severe oncotic pressure deficits states. B. Salt-free meals reduce sodium-induced water retention and edema formation risk. Low sodium diet decreases extracellular fluid volume expansion postoperatively state. Dietary sodium restriction supports fluid balance in vulnerable patients population. It is supportive but not sole critical intervention for edema. C. Encouraging fluid intake may exacerbate interstitial fluid accumulation risk increase. Excess fluids increase capillary hydrostatic pressure worsening edema formation severity. Postoperative patients require balanced rather than excessive hydration therapy approach. Fluid management must be individualized based on clinical status assessment. D. Early ambulation promotes venous return reducing postoperative edema risk formation. Movement enhances lymphatic drainage preventing interstitial fluid accumulation and edema. It decreases venous stasis and improves peripheral circulation hemodynamic flow. It is a primary evidence based intervention after surgery protocol.