Edema and Daily Weights

Edema is not a diagnosis; it is fluid that has moved into the interstitial space. In heart failure, reduced effective cardiac output and elevated venous pressure activate renal sodium and water retention. The result is increased intravascular and venous hydrostatic pressure, followed by fluid movement into dependent tissues and sometimes into the lungs. The scale often detects this process before the hands can. Interstitial fluid must accumulate substantially before swelling becomes visible or a pitting depression can be found. A rising weight may therefore be the earliest measurable sign that congestion is returning, even when the ankles look unchanged. For an LVN/LPN, this topic is primarily about reliable measurement, pattern recognition, response monitoring, and timely reporting. Follow the patient’s orders, state scope of practice, and facility policy. Do not independently increase a diuretic, give an extra dose, impose a fluid restriction, or label unilateral swelling as a DVT.