In a patient an IV cannula is inserted in external jugular vein (EJV) and administered a drug. Which is a correct pathway of the drug to reach up to the heart?

Appeared in: NORCET -4 , 2023

Explanation

The External Jugular Vein (EJV) is a superficial vein that collects blood from the outer scalp and parts of the face.
It travels down the side of the neck and terminates by draining directly into the subclavian vein, located behind the clavicle.
The subclavian vein then unites with the internal jugular vein to form the larger brachiocephalic vein (also known as the innominate vein).
Finally, the right and left brachiocephalic veins merge to create the superior vena cava, which delivers deoxygenated blood into the right atrium of the heart.

Option B: This option incorrectly states that the EJV drains into the Internal Jugular Vein (IJV). Anatomically, the EJV drains into the subclavian vein.
Option C: This option is incorrect because it omits a crucial vessel in the pathway: the subclavian vein. The EJV cannot directly connect to the brachiocephalic vein.
Option D: This option incorrectly includes the IJV as an intermediate step between the EJV and the subclavian vein. The EJV drains directly into the subclavian vein.

Visual 1: Diagram - A clear anatomical illustration of the major veins of the neck and superior thorax. The diagram should highlight the EJV, showing its course down the neck and its junction with the subclavian vein. The formation of the brachiocephalic vein from the union of the subclavian and internal jugular veins should also be clearly labeled, along with the superior vena cava entering the heart.

Clinical Relevance

Nursing practice connection: Use the key finding related to Venous drainage pathway of the head and neck to guide bedside assessment, documentation, and the next nursing action.
Knowledge of this venous pathway is fundamental for nurses performing or assisting with the insertion of central venous catheters into the EJV, a common site for vascular access.
Correctly identifying this pathway helps prevent complications such as catheter malposition, where the catheter tip could enter the subclavian vein in the wrong direction (towards the arm) or coil in the brachiocephalic vein instead of advancing to the superior vena cava.
Patient safety depends on this anatomical knowledge to ensure that centrally administered medications and fluids are delivered effectively to the central circulation and to allow for accurate central venous pressure monitoring.

How to Approach the Question

First, identify the starting point of the drug's journey as stated in the question: the External Jugular Vein (EJV).
Next, recall the basic anatomical sequence of venous blood flow from the neck back to the heart. Blood flows from smaller superficial veins to larger deep veins.
Trace the path step-by-step: The EJV is a superficial vein that must drain into a larger, more central vein. This is the subclavian vein.
Continue the sequence: The subclavian vein then joins with the internal jugular vein to form the brachiocephalic vein.
Finally, the brachiocephalic veins from both sides of the body unite to form the superior vena cava, which empties into the heart.
Review the given options and select the one that accurately follows this anatomical sequence without adding incorrect steps or omitting essential vessels.

Concept Tested & Keywords

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Practise the full NORCET -4 , 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.