If Patient's blood Pressure is 83/50. Calculate mean arterial blood pressure?

AIIMS Raipur NO - 2017 (Shift-1)

Nursing Foundation

Medium

Appeared in: AIIMS Raipur NO - 2017 (Shift-1)

Explanation

determined by applying the standard formula for Mean Arterial Pressure (MAP): MAP = Diastolic BP + 1/3 (Systolic BP - Diastolic BP).
The difference between systolic and diastolic pressure is known as the pulse pressure.
Given a blood pressure of 83/50 mmHg, the systolic pressure is 83 and the diastolic pressure is 50.
Calculation: MAP = 50 + 1/3 (83 - 50).
This simplifies to MAP = 50 + 1/3 (33), which equals 50 + 11.
Therefore, the final calculated MAP is 61 mmHg.

Option A: This value is incorrect and likely results from a miscalculation, possibly by incorrectly applying the formula or making an arithmetic error.
Option B: This value is incorrect. It might be the result of an arithmetic mistake, such as dividing by a wrong number or incorrectly adding the components.
Option D: This value is incorrect. It is close to the correct answer but represents a calculation error. A MAP of 65 mmHg is often cited as a minimum target for organ perfusion, which might make this option seem plausible, but it is not the result of the calculation.

Visual 1: Diagram - A clear infographic illustrating the formula for MAP: MAP = DBP + 1/3(SBP - DBP).
Visual 2: Chart - A chart showing different blood pressure readings and their corresponding MAP values, highlighting normal, low (hypotensive), and high (hypertensive) ranges.

Clinical Relevance

Nursing practice connection: Use the key finding related to Calculation of Mean Arterial Pressure (MAP) to guide bedside assessment, documentation, and the next nursing action.
Monitoring MAP is critical in nursing, especially in intensive care, as it provides a more accurate measure of organ perfusion than systolic or diastolic pressure alone.
A MAP below 60-65 mmHg for an extended period can lead to organ damage from insufficient blood flow, a condition known as shock. Nurses must recognize low MAP values and report them urgently.
What if the patient was known to have chronic hypertension? In such cases, their body might require a higher MAP (e.g., 75-80 mmHg) to ensure adequate organ perfusion, a phenomenon known as autoregulation shift. A MAP of 61 mmHg would be even more concerning for this patient.

How to Approach the Question

First, identify the question type. This is a calculation-based question requiring knowledge of a specific physiological formula.
Recall or look up the formula for Mean Arterial Pressure (MAP): MAP = Diastolic BP + 1/3 (Systolic BP - Diastolic BP).
Identify the given values from the question stem: Systolic BP = 83 mmHg and Diastolic BP = 50 mmHg.
Substitute the values into the formula: MAP = 50 + 1/3 (83 - 50).
Perform the calculation step-by-step: first the subtraction within the parentheses (83 - 50 = 33), then the division (33 / 3 = 11), and finally the addition (50 + 11 = 61).
Compare your calculated result (61 mmHg) with the given options to find the correct answer.

Concept Tested & Keywords

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