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Multiple Choice

What does the orange color in a standing plasma test indicate?

Lipids in standing plasma tests are separated and visualized based on their content and density. When a lipid stain that binds to triglycerides is used, the color intensity in the remaining plasma portion reflects the amount of triglyceride-rich lipoproteins present. Chylomicrons are the large particles that rise to the top as a creamy layer, so they don’t color the standing plasma in the same way. If the plasma itself shows an orange tint after standing, that orange comes from the triglyceride-rich fraction remaining in the serum, which is VLDL. So the orange color indicates VLDL. LDL and HDL carry less triglyceride and don’t produce that orange coloration, and chylomicrons would appear as a distinct creamy layer rather than coloring the plasma.

Lipids in standing plasma tests are separated and visualized based on their content and density. When a lipid stain that binds to triglycerides is used, the color intensity in the remaining plasma portion reflects the amount of triglyceride-rich lipoproteins present. Chylomicrons are the large particles that rise to the top as a creamy layer, so they don’t color the standing plasma in the same way. If the plasma itself shows an orange tint after standing, that orange comes from the triglyceride-rich fraction remaining in the serum, which is VLDL. So the orange color indicates VLDL. LDL and HDL carry less triglyceride and don’t produce that orange coloration, and chylomicrons would appear as a distinct creamy layer rather than coloring the plasma.