The nurse is checking the client's central venous pressure. The nurse should place the zero of the manometer at the?

Appeared in: DHS 2018 shift 1st

Explanation

The phlebostatic axis is the correct external anatomical reference point for zeroing a transducer for Central Venous Pressure (CVP) measurement.
It is located at the intersection of the 4th intercostal space and the mid-axillary line.
This point approximates the level of the right atrium, ensuring that the measurement accurately reflects the pressure within the right atrium by negating the effects of hydrostatic pressure.

Option B: The Point of Maximal Impulse (PMI) is where the apical pulse is palpated and is used for assessing the cardiac impulse, not for zeroing a CVP line.
Option C: Erb's point is an auscultatory area on the chest used for listening to heart sounds, particularly S1 and S2, and certain murmurs.
Option D: The Tail of Spence is an extension of breast tissue into the axilla and has no relevance to cardiovascular pressure monitoring.

Clinical Relevance

Nursing practice connection: Use the key finding related to Anatomical landmark for central venous pressure (CVP) measurement to guide bedside assessment, documentation, and the next nursing action.
Accurate CVP measurement is crucial for managing fluid balance, assessing cardiac function, and guiding treatment (like fluid resuscitation or diuretics) in critically ill patients.
Consistent use of the phlebostatic axis for zeroing the transducer ensures that serial measurements are reliable and comparable, allowing for accurate trend analysis of the patient's hemodynamic status.
What if? If the transducer is placed higher than the phlebostatic axis, the CVP reading will be falsely low. If placed lower, the reading will be falsely high. Both errors can lead to incorrect and potentially harmful clinical decisions regarding fluid management.

How to Approach the Question

First, identify the core task in the question: finding the correct anatomical landmark for checking central venous pressure.
Recall the principles of hemodynamic monitoring. The goal is to measure pressure at a specific point in the heart (the right atrium for CVP). To do this accurately, you need a consistent external reference point at the same level.
Evaluate each option based on its known anatomical location and clinical use.
Recognize that 'phlebostatic axis' is the specific term for the reference level for central pressure monitoring.
Eliminate the other options by identifying their primary functions: PMI is for the apical pulse, Erb's point is for listening to heart sounds, and the Tail of Spence is for breast exams. None are related to pressure measurement.
Select the option that directly relates to standardizing pressure measurements relative to the right atrium.

Concept Tested & Keywords

Concept Tested: Anatomical landmark for central venous pressure (CVP) measurement.
Stem keywords: central venous pressure, CVP, zero of the manometer
Lead-in keywords: place the
Negative lead-in flag: false

QXIFh7nQhR7yn-OXGfa5qf

E6 Nursing Fundamentals Taylor p. 145-147

E6 Medicine Macleod Clinical Examination 15e p. 64-66

Practise the full DHS 2018 shift 1st

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