TPN Care And Metabolic Monitoring

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NCLEX-RN › TPN Care And Metabolic Monitoring

Questions 1 - 10
1

A 33-year-old client on home TPN for malabsorption (history of ulcerative colitis with colectomy) infuses 1,800 mL over 10 hours nightly via central line (dextrose 18%, amino acids 5%, electrolytes, vitamins). The client reports the pump alarmed overnight, so the client turned it off for several hours and then restarted it at a faster rate to “catch up.” Morning blood glucose is 54 mg/dL (3.0 mmol/L) with diaphoresis. What is the nurse's PRIORITY action for a client receiving TPN?

Ask the client to demonstrate sterile dressing change technique

Treat hypoglycemia immediately per protocol and instruct the client not to change infusion rates without guidance

Schedule weekly weight checks to assess nutritional status

Delegate to a family member to monitor the pump settings nightly

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is hypoglycemia from improper infusion rate adjustments in home TPN. Treating hypoglycemia and instructing on schedule adherence is the highest priority to prevent recurrence and ensure safety. Demonstrating dressing change is secondary; scheduling weights monitors nutrition; delegating to family is inappropriate, addressing misconceptions about self-management. Prioritizing client safety involves correcting unsafe practices. Decision-making in TPN care emphasizes education on pump use. A transferable nursing strategy is to reinforce infusion protocols and monitor for adherence during home visits.

2

A 49-year-old client with severe pancreatitis is receiving TPN via central line: dextrose 25%, amino acids 5%, electrolytes, vitamins at 90 mL/hr; lipids 20% over 12 hours. The nurse notes the TPN solution appears cloudy with visible particles in the tubing. The client is stable and afebrile. What is the nurse's PRIORITY action for a client receiving TPN?

Flush the central line with heparin to clear the particles

Stop the infusion and replace the tubing and solution per policy; do not infuse the contaminated-appearing TPN

Increase the infusion rate to reduce the time the solution is hanging

Delegate to assistive personnel to gently shake the bag to mix the contents

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is contaminated TPN solution posing infection or embolism risks. Stopping the infusion and replacing tubing/solution is the highest priority to avoid infusing particles. Increasing rate worsens exposure; shaking may not resolve; flushing doesn't address source, addressing misconceptions about visual inspections. Prioritizing client safety involves discarding suspect solutions. Decision-making in TPN care emphasizes sterility checks. A transferable nursing strategy is to inspect TPN bags for clarity before hanging and report anomalies to pharmacy.

3

A 5-year-old child (history: necrotizing enterocolitis as an infant) has short bowel syndrome and is receiving TPN via a central venous catheter. The TPN is infusing continuously at 40 mL/hr and contains dextrose 15%, amino acids 3%, electrolytes, vitamins, and trace elements; lipids 20% infuse over 20 hours daily. The child has a temperature of 38.5°C (101.3°F) and is irritable; the catheter site appears normal. Which assessment finding indicates a complication of TPN therapy?

Fever and irritability in a child with a central line receiving TPN

Urine output 1 mL/kg/hr

Heart rate 110/min while crying during assessment

Capillary refill 2 seconds and warm extremities

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is infection in pediatric clients with central lines for TPN. Fever and irritability indicate the highest priority as they suggest central line infection despite normal site appearance. Heart rate 110/min while crying is expected; capillary refill 2 seconds and urine output 1 mL/kg/hr are normal, countering misconceptions about vital sign variations. Prioritizing client safety involves early sepsis recognition. Decision-making in TPN care focuses on age-specific assessments. A transferable nursing strategy is to monitor for subtle infection signs like behavioral changes in children on TPN.

4

A 62-year-old client with a history of type 2 diabetes and hypertension is postoperative day 2 after bowel resection for obstruction and is receiving total parenteral nutrition (TPN) via a central venous catheter because bowel sounds are absent. Current data: temperature 38.6°C (101.5°F), heart rate 112/min, blood pressure 104/62 mm Hg, and the central line insertion site is erythematous with purulent drainage. The TPN is infusing continuously at 75 mL/hr and contains dextrose 20%, amino acids 5%, and lipids 20% (separate piggyback over 12 hr). Which assessment finding indicates a complication of TPN therapy?

Mild thirst and dry mouth after being NPO for 48 hours

Erythema and purulent drainage at the central line insertion site with fever

Blood glucose 168 mg/dL (9.3 mmol/L) 2 hours after starting the infusion

Urine output 40 mL/hr with clear, pale-yellow urine

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is infection at the central line site, a common and serious complication of TPN administration. Erythema and purulent drainage with fever indicate the highest priority as they suggest central line-associated bloodstream infection, requiring immediate intervention to prevent sepsis. Blood glucose of 168 mg/dL is mildly elevated but expected with TPN and not critical; urine output of 40 mL/hr is normal; mild thirst and dry mouth are common after being NPO and not indicative of complication, addressing misconceptions about dehydration versus infection signs. Prioritizing client safety involves vigilant monitoring of the insertion site for signs of infection. Decision-making in TPN care emphasizes early recognition of complications like infection to avoid systemic spread. A transferable nursing strategy is to perform daily site assessments and adhere to sterile technique during dressing changes to minimize infection risk.

5

A 54-year-old client with severe pancreatitis is receiving continuous TPN via central venous catheter because oral intake is not tolerated. The TPN is running at 90 mL/hr (dextrose 25%, amino acids 5%, electrolytes, vitamins) and lipids 20% are scheduled over 12 hours nightly. Current labs: alkaline phosphatase 220 U/L (elevated), total bilirubin 3.1 mg/dL (elevated), AST 88 U/L (elevated), ALT 96 U/L (elevated); the client reports pruritus and has scleral icterus. Which assessment finding indicates a complication of TPN therapy?

Capillary blood glucose 156 mg/dL (8.7 mmol/L) before breakfast

Mild nausea after receiving opioid analgesics

Weight gain of 0.3 kg (0.7 lb) over 24 hours

Scleral icterus with rising bilirubin and liver enzymes

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is hepatotoxicity, a complication from prolonged TPN use causing cholestasis and liver enzyme elevation. Scleral icterus with rising bilirubin and liver enzymes indicates the highest priority as it suggests TPN-induced liver dysfunction needing intervention. Blood glucose 156 mg/dL is mildly elevated but manageable; mild nausea may relate to medications, not TPN; weight gain of 0.3 kg is minimal and expected, countering misconceptions about normal versus pathological changes. Prioritizing client safety involves monitoring liver function tests regularly. Decision-making in TPN care focuses on minimizing long-term organ damage. A transferable nursing strategy is to cycle TPN infusions and monitor for signs of liver stress to prevent hepatobiliary complications.

6

A 67-year-old client is receiving TPN after bowel surgery via central venous catheter. The TPN is infusing at 75 mL/hr and contains dextrose 20%, amino acids 5%, electrolytes, vitamins, and trace elements. A new order is written: “Administer TPN through a peripheral IV in the forearm until central line is replaced.” The nurse should QUESTION which TPN order?

Monitor capillary blood glucose every 6 hours while on TPN

Use an infusion pump for continuous administration

Change TPN tubing per facility policy

Administer the current TPN formulation through a peripheral IV

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is phlebitis and osmolarity risks with hypertonic TPN. Administering through peripheral IV should be questioned as TPN requires central access to avoid vein damage. Monitoring glucose, using pumps, and changing tubing are standard and appropriate, countering misconceptions about access routes. Prioritizing client safety involves proper administration sites. Decision-making in TPN care focuses on vascular access guidelines. A transferable nursing strategy is to confirm central line placement before initiating TPN to prevent peripheral complications.

7

A 53-year-old client is postoperative after bowel surgery and receiving TPN via central line due to ileus. The TPN is infusing at 65 mL/hr (dextrose 20%, amino acids 5%, electrolytes, vitamins). The nurse receives a new order to abruptly discontinue TPN now that the client is tolerating clear liquids. The client’s recent capillary blood glucose values have been 160–210 mg/dL (8.9–11.7 mmol/L). The nurse should QUESTION which TPN order?

Abruptly discontinue TPN now that clear liquids are tolerated

Continue capillary blood glucose monitoring during transition off TPN

Flush the central line per policy after TPN is discontinued

Begin advancing oral diet as tolerated per postoperative protocol

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is rebound hypoglycemia from sudden TPN cessation. Abruptly discontinuing TPN should be questioned as it risks low glucose in clients with recent hyperglycemia. Advancing diet, continuing monitoring, and flushing lines are appropriate during transitions, countering misconceptions about rapid weaning. Prioritizing client safety involves gradual tapering. Decision-making in TPN care focuses on metabolic stability during discontinuation. A transferable nursing strategy is to reduce TPN rate over hours while advancing enteral intake to prevent hypoglycemia.

8

A 58-year-old client with Crohn’s disease is postoperative after small bowel resection and is receiving TPN via a central line due to high-output nasogastric suction. The TPN is infusing at 85 mL/hr with dextrose 20%, amino acids 5%, electrolytes, vitamins, and trace elements. Current labs: phosphorus 1.6 mg/dL (low; typical 2.5–4.5 mg/dL), magnesium 1.4 mg/dL (low; typical 1.7–2.2 mg/dL), potassium 3.1 mEq/L (low). The client is weak and has new paresthesias. Which lab value requires IMMEDIATE intervention for a client on TPN?

Calcium 9.0 mg/dL

Phosphorus 1.6 mg/dL (low)

Chloride 102 mEq/L

Hemoglobin 11.2 g/dL

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is hypophosphatemia, a metabolic imbalance from refeeding syndrome in malnourished clients on TPN. Phosphorus 1.6 mg/dL requires immediate intervention as it can cause weakness, paresthesias, and respiratory failure. Calcium 9.0 mg/dL, chloride 102 mEq/L, and hemoglobin 11.2 g/dL are normal and not urgent, addressing misconceptions that all low labs are equally critical in TPN. Prioritizing client safety involves correcting phosphate deficits promptly. Decision-making in TPN care emphasizes preventing refeeding syndrome through gradual initiation. A transferable nursing strategy is to monitor electrolytes closely in the first week of TPN and supplement as needed to avoid imbalances.

9

A 44-year-old client with severe pancreatitis is receiving TPN via a PICC: dextrose 25%, amino acids 5%, electrolytes, vitamins at 90 mL/hr; lipids 20% over 12 hours. The nurse notes the PICC dressing is loose and damp, and the insertion site is tender. The client is afebrile. What is the nurse's PRIORITY action for a client receiving TPN?

Flush the PICC with normal saline to relieve tenderness

Document the finding and recheck the dressing at end of shift

Delegate to assistive personnel to reinforce the dressing with tape

Perform sterile dressing change and assess the site for infection or catheter complications

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is infection risk from compromised PICC dressing. Performing sterile dressing change and assessing the site is the highest priority to prevent bacterial entry. Delegating reinforcement is unsafe; documenting delays action; flushing doesn't address dressing, addressing misconceptions about minor site issues. Prioritizing client safety involves aseptic techniques. Decision-making in TPN care emphasizes site integrity. A transferable nursing strategy is to change dressings per policy and assess for tenderness to catch early infections.

10

A 9-year-old child with short bowel syndrome is receiving long-term TPN at home: 1,200 mL over 12 hours nightly (dextrose 15%, amino acids 3%, electrolytes, vitamins, trace elements) with 20% lipids 3 times per week. During a clinic visit, the child’s weight has decreased by 1.5 kg (3.3 lb) in 1 month and height percentile has dropped; the caregiver reports the child “sometimes skips” the infusion on weekends. What is the nurse's PRIORITY action for a client receiving TPN?

Assess adherence barriers and reinforce the prescribed infusion schedule to prevent malnutrition and growth failure

Encourage increased oral intake of high-fiber foods to promote bowel adaptation

Delegate to office staff to schedule the next visit in 6 months

Request an order to discontinue TPN because the child is school-aged

Explanation

This question tests clinical judgment in TPN care and metabolic monitoring. The priority concern is nonadherence leading to malnutrition and growth failure in pediatric home TPN. Assessing barriers and reinforcing the schedule is the highest priority to promote compliance and health. Delegating scheduling delays care; encouraging fiber may not suit short bowel; discontinuing TPN is premature, addressing misconceptions about independence. Prioritizing client safety involves supporting caregivers. Decision-making in TPN care emphasizes long-term nutritional goals. A transferable nursing strategy is to collaborate with families on adherence plans and monitor growth parameters regularly.

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