Collapsing pulse is also known as

Appeared in: UPUMS Nsg.Officer-2024

Explanation

A collapsing pulse is a specific type of arterial pulse characterized by a rapid, forceful upstroke followed by an equally rapid collapse or downstroke.
It is also known by the synonyms 'water-hammer pulse' and 'Corrigan's pulse'.
This finding is a classic sign of severe aortic regurgitation, where blood flows backward into the left ventricle during diastole, causing a sudden drop in arterial pressure.
It can also be seen in other conditions with a large arteriovenous runoff, such as patent ductus arteriosus or a large arteriovenous fistula.

Option A: A bounding pulse is strong and forceful but lacks the characteristic sudden, steep collapse. It feels full throughout the pulse cycle.
Option B: Pulse oximetry is not a type of pulse. It is a non-invasive diagnostic procedure used to measure the oxygen saturation (SpO2) of a patient's blood.
Option D: A bigeminal pulse refers to a disorder of cardiac rhythm, not the character or contour of the pulse wave. It is characterized by pairs of beats, where a normal sinus beat is followed by a premature contraction.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Assessment of Arterial Pulse Characteristics as background academic context rather than a clinical decision trigger.
Identifying a collapsing (water-hammer) pulse is a critical physical assessment finding that strongly suggests severe aortic regurgitation.
Its presence should prompt the nurse to perform a more detailed cardiovascular assessment, including auscultation for heart murmurs (especially an early diastolic murmur), and to notify the physician for further diagnostic workup like an echocardiogram.
What if? If the pulse was simply strong and full but did not collapse rapidly, it would be classified as a 'bounding pulse,' pointing towards different underlying causes like hyperdynamic states (fever, sepsis, anemia) rather than aortic regurgitation.

How to Approach the Question

This is a factual recall question testing knowledge of medical terminology related to cardiovascular assessment.
First, identify the key term in the question: 'collapsing pulse'.
Recall the definition and characteristics of a collapsing pulse: a rapid rise and a sudden, steep fall.
Evaluate the options to find the direct synonym. 'Water hammer pulse' is the classic synonym for a collapsing pulse.
Eliminate the other options by recalling their definitions: 'Bounding pulse' is strong but not collapsing, 'pulse oximetry' is a measurement tool, and 'bigeminal pulse' is a rhythm abnormality.

Concept Tested & Keywords

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E6 Physiology Review Sembulingam 5e p. 124-126

E6 Medicine Harrison 22e Part 1 p. 1904-1906

E6 Medicine Macleod Clinical Examination 15e p. 61-63

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