Identify the procedure being performed in the image?

NORCET 1 - 2020

Pathology & Genetics

Medium

Appeared in: NORCET 1 - 2020

Explanation

The image displays a healthcare provider palpating the radial pulse on the wrist, a key step in locating the radial artery for an arterial puncture.
The needle is inserted at a steep angle (approximately 45 degrees), which is the correct technique for accessing the deeper radial artery, unlike the shallower angle used for veins.
A crucial differentiating factor is the absence of a tourniquet. Tourniquets are used to engorge veins for venipuncture and are not used for arterial blood draws.
This combination of palpating a pulse, a steep insertion angle, and no tourniquet is the classic technique for obtaining an arterial blood sample for ABG analysis.

Option B: IV drug administration is a venous procedure. The technique involves a shallower needle angle (15-30 degrees) and often the placement of an indwelling catheter, neither of which is depicted.
Option C: Venipuncture is the act of puncturing a vein. This procedure requires a tourniquet to make the vein more prominent and uses a shallower needle angle (15-30 degrees). The image shows an arterial puncture technique.
Option D: Since the procedure is specifically an arterial puncture for ABG analysis, and not IV drug administration or venipuncture, this option is incorrect.

Visual 1: Diagram: A comparative diagram showing the different needle angles and anatomical targets for Arterial Puncture (45-60 degrees into an artery) vs. Venipuncture (15-30 degrees into a vein).
Visual 2: Infographic: Step-by-step illustration of performing the Allen's test prior to radial artery puncture.
Visual 3: Flowchart: Decision-making flowchart for choosing a vascular access site, differentiating between venous and arterial access indications.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of clinical procedures based on visual technique as background academic context rather than a clinical decision trigger.
ABG analysis is a critical diagnostic tool for assessing a patient's oxygenation, ventilation, and acid-base status. Nurses must be able to correctly identify, assist with, or perform this procedure.
Recognizing the difference between arterial and venous puncture is a fundamental patient safety issue. Inadvertent arterial puncture during a venous attempt can lead to hematoma, bleeding, and nerve damage.
Post-procedure care is critical. The nurse's primary responsibility after an ABG draw is to apply firm pressure to the site for at least 5 minutes to prevent a hematoma, which is a higher risk due to arterial pressure.

How to Approach the Question

First, carefully observe the image for key details of the clinical procedure being performed.
Identify the anatomical location (the wrist) and the specific actions of the healthcare provider (palpating with two fingers, inserting a needle).
Note the angle of the needle insertion. A steep angle (45-60 degrees) often suggests an arterial or deep tissue target, while a shallow angle (15-30 degrees) suggests a superficial vein.
Look for the presence or absence of equipment like a tourniquet. Its absence is a strong clue that this is not a routine venipuncture.
Synthesize these visual cues: palpating a pulse + steep angle + no tourniquet = arterial puncture. Then, match this conclusion to the given options.

Concept Tested & Keywords

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