A patient who is admitted in ICU and receiving TPN therapy. The on-duty nursing officer best knows that Intralipids can be administered by which of the following route?

1. A

   Central line

2. B

   Gastrostomy tube

3. C

   Peripheral line

4. D

   Feeding tube

Appeared in: NORCET 6 mains-2024

Explanation

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• The patient is receiving TPN, a hypertonic solution that necessitates administration through a central line to prevent vein damage.
• While Intralipids are isotonic and can be given peripherally, the standard of care for a patient already on TPN is to use the existing central line.
• Administering lipids via the central line can be done by mixing them into a 3-in-1 Total Nutrient Admixture (TNA) or by infusing them simultaneously through a Y-connector.
• Using the established central access is safer and more efficient, as it avoids an additional needle stick and reduces the risk of infection associated with another IV site.

Why Other Options Were Wrong

• Option B: A gastrostomy tube is a route for enteral nutrition, delivering nutrients directly to the stomach. Parenteral nutrition components like TPN and Intralipids are administered intravenously into the bloodstream.
• Option C: While Intralipids are isotonic and can be given via a peripheral line, it is not the best or most common practice for a patient already receiving TPN through a central line. Using the existing central line is preferred.
• Option D: A feeding tube, similar to a gastrostomy tube, is used for enteral feeding into the GI tract (stomach or intestines). It is not a route for intravenous parenteral nutrition.

Related Visual

• Visual 1: Diagram - Showing a central venous catheter with TPN and a lipid bag connected via a Y-site. This illustrates the simultaneous infusion method.
• Visual 2: Image - A comparison of a 3-in-1 TNA bag (milky white, containing lipids) versus a 2-in-1 TPN bag (clear, yellowish, without lipids). This helps differentiate the types of admixtures.

Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Administration routes for components of Parenteral Nutrition (TPN and Intralipids) in acute care settings.
• Nurses are responsible for correctly administering TPN and lipids, which includes verifying the route, rate, and solution compatibility to prevent life-threatening complications like fat emboli or catheter-related bloodstream infections (CRBSI).
• Understanding the difference between parenteral and enteral nutrition is fundamental to patient safety. Administering TPN/lipids enterally would be a catastrophic error.
• What if? If the patient only required short-term nutritional support (less than 7 days) and did not need high caloric intake, the provider might order Peripheral Parenteral Nutrition (PPN). In that case, both the less-concentrated nutrient solution and the lipids would be administered via a peripheral line.

How to Approach the Question

• First, identify the key clinical context: The patient is in the ICU and receiving TPN.
• Recall the properties of TPN. It is a hypertonic solution, which dictates its administration route.
• Recognize that TPN requires a central line to prevent phlebitis.
• Next, consider the specific substance in the question: Intralipids. Recall that lipids are isotonic.
• Evaluate the options in the context of the patient's existing therapy. Although lipids can go into a peripheral line, the patient already has a central line for TPN.
• Select the answer that represents the best and most common practice in this scenario, which is to use the existing central line for all parenteral nutrition components to enhance safety and efficiency.

Concept Tested & Keywords

• Concept Tested: Administration routes for components of Parenteral Nutrition (TPN and Intralipids).
• Stem keywords: ICU, TPN therapy, Intralipids, administered
• Lead-in keywords: best knows, which of the following route
• Clinical cues: The patient is in the ICU and receiving TPN, which implies a central line is already in place and the patient is critically ill, making efficient and safe IV access a priority.

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