EFAD is usually seen after how long of fat-free PN?

EFAD is usually seen after how long of fat-free PN?

• A. 2 weeks
• B. 6 weeks
• C. 8 weeks
• D. 4 weeks

Answer: (D)

Essential fatty acids must come from the lipid part of PN because the body cannot synthesise them. When fat-free PN is given, the body's stores of essential fatty acids are gradually depleted, and it takes several weeks for clinical signs to appear. In adults, the usual time frame for EFAD to become evident is around four weeks of fat-free PN. This reflects the balance between ongoing needs for fatty acids and the body's stored reserves; without lipids, skin and barrier function deteriorate and signs such as dry, scaly dermatitis and hair loss can emerge. Shorter durations, like about two weeks, may not yet show frank EFAD in many patients, while much longer periods are less typical before symptoms prompt concern. If there’s concern for EFAD, reintroducing safe lipid provision or modifying PN to include fats helps prevent or reverse the deficiency.

Essential fatty acids must come from the lipid part of PN because the body cannot synthesise them. When fat-free PN is given, the body's stores of essential fatty acids are gradually depleted, and it takes several weeks for clinical signs to appear. In adults, the usual time frame for EFAD to become evident is around four weeks of fat-free PN. This reflects the balance between ongoing needs for fatty acids and the body's stored reserves; without lipids, skin and barrier function deteriorate and signs such as dry, scaly dermatitis and hair loss can emerge. Shorter durations, like about two weeks, may not yet show frank EFAD in many patients, while much longer periods are less typical before symptoms prompt concern. If there’s concern for EFAD, reintroducing safe lipid provision or modifying PN to include fats helps prevent or reverse the deficiency.