Which lab is not part of the weekly monitoring labs for home PN?

Which lab is not part of the weekly monitoring labs for home PN?

• A. Serum Magnesium
• B. Phosphorus
• C. Calcium
• D. Serum Glucose

Answer: (C)

Weekly monitoring labs for home PN focus on electrolytes that are most sensitive to PN composition and can shift quickly, signaling the need to adjust the formulation. Magnesium and phosphorus fit this role because their levels respond promptly to changes in supplementation and PN intake, helping clinicians prevent deficiencies and related complications. Calcium, however, tends to be influenced by multiple factors (bone metabolism, vitamin D status, albumin, acid-base balance) and does not fluctuate as rapidly in response to PN changes, so it is not routinely included in the weekly lab panel. It’s monitored less frequently or evaluated in response to specific concerns rather than on every weekly draw. Serum glucose is managed with more frequent monitoring (often daily) to control glycemic responses to the dextrose in PN, rather than relying on weekly labs alone.

Weekly monitoring labs for home PN focus on electrolytes that are most sensitive to PN composition and can shift quickly, signaling the need to adjust the formulation. Magnesium and phosphorus fit this role because their levels respond promptly to changes in supplementation and PN intake, helping clinicians prevent deficiencies and related complications. Calcium, however, tends to be influenced by multiple factors (bone metabolism, vitamin D status, albumin, acid-base balance) and does not fluctuate as rapidly in response to PN changes, so it is not routinely included in the weekly lab panel. It’s monitored less frequently or evaluated in response to specific concerns rather than on every weekly draw. Serum glucose is managed with more frequent monitoring (often daily) to control glycemic responses to the dextrose in PN, rather than relying on weekly labs alone.