Identify the red-colored waveform in the picture below?& x20; - AIIMS Delhi NO - 2018

AIIMS Delhi NO - 2018

Medical Surgical Nursing

Easy

Appeared in: AIIMS Delhi NO - 2018

Explanation

The red waveform on a standard patient monitor universally represents invasive Arterial Blood Pressure (ABP).
The image displays a characteristic ABP waveform with a rapid systolic upstroke, a dicrotic notch (representing aortic valve closure), and a slower diastolic runoff.
The numerical data next to the waveform, 120/80 mmHg, confirms the reading as systolic and diastolic blood pressure, with a mean arterial pressure of (93) mmHg.

Option B: End-tidal CO₂ (capnography) is represented by the yellow waveform on the monitor, not the red one.
Option C: The ECG trace, which shows the heart's electrical rhythm, is represented by the green waveform at the top of the monitor.
Option D: Oxygen saturation (SpO₂) is a numerical value (shown as 98% in the image) that is associated with the blue plethysmograph waveform, not the red waveform.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Interpretation of waveforms on an anesthesia monitor as background academic context rather than a clinical decision trigger.
Rapid identification of waveforms by color is a critical skill for nurses in high-acuity settings like the OR and ICU, allowing for immediate assessment of a patient's hemodynamic and respiratory status.
The arterial pressure waveform provides real-time, beat-to-beat blood pressure information, which is far more precise than intermittent cuff measurements, especially in unstable patients or during major surgery.
What if? - If the red arterial waveform suddenly becomes flat or severely dampened, the nurse must immediately assess the patient and the arterial line system. This could indicate a life-threatening event like cardiac arrest or a technical issue like a clotted catheter, kinked tubing, or transducer problem that needs urgent troubleshooting.

How to Approach the Question

First, analyze the image provided. It is a multi-parameter patient monitor displaying several colored waveforms and numbers.
Identify the specific waveform the question asks about, which is the 'red-colored waveform'.
Recall or deduce the standard color-coding convention used for physiological monitoring in clinical settings.
Observe the shape of the red waveform (sharp upstroke, notch, gradual decline) and the associated numbers (120/80), which are characteristic of arterial blood pressure.
Evaluate the given options based on this visual evidence and knowledge of monitoring parameters.
Eliminate the incorrect options: End-tidal CO2 is yellow, ECG is green, and Oxygen Saturation is associated with the blue waveform. The original option 'Arterial blood gas' is a lab test, not a waveform.

Concept Tested & Keywords

Concept Tested: Interpretation of waveforms on an anesthesia monitor.
Stem keywords: red-colored waveform, anesthesia monitor, identify
Lead-in keywords: BEST, MOST RELEVANT CLUE
Clinical cues: The image shows a multi-parameter patient monitor, common in operating rooms and ICUs.
Clinical cues: The numerical values 120/80 (93) next to the red waveform correspond to systolic, diastolic, and mean arterial pressure.

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