Which instrument is used to measure the blood pressure manually?

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UPSC CDS-I 2025 (General Studies) Official Paper (Held On: 13 Apr, 2025)
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  1. Sphygmomanometer
  2. Centrifuge
  3. Electrophoresis
  4.  Thermal cycler

Answer (Detailed Solution Below)

Option 1 : Sphygmomanometer
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Detailed Solution

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The correct answer is Sphygmomanometer.

Key Points

  • A Sphygmomanometer is a medical instrument used to measure blood pressure manually.
  • The device typically consists of an inflatable cuff, a measuring unit (manometer), and a mechanism for inflation (bulb or pump).
  • Blood pressure is measured in millimeters of mercury (mmHg) and recorded as two numbers: systolic pressure (higher) over diastolic pressure (lower).
  • Manual sphygmomanometers are commonly used with a stethoscope to listen to the arterial blood flow sounds during measurement.
  • It is widely used by healthcare professionals for accurate and reliable blood pressure readings.

Additional Information

  • Types of Sphygmomanometers
    • There are three main types: Mercury, Aneroid, and Digital sphygmomanometers.
    • Mercury sphygmomanometers are considered the gold standard for accuracy.
    • Aneroid devices use a mechanical gauge and require regular calibration.
    • Digital devices are user-friendly and suitable for home use but may have slight accuracy variations.
  • Korotkoff Sounds
    • These are the sounds heard through a stethoscope while measuring blood pressure using a manual sphygmomanometer.
    • They indicate changes in blood flow and are used to determine systolic and diastolic pressures.
  • Hypertension and Hypotension
    • Hypertension: High blood pressure, typically defined as 140/90 mmHg or higher.
    • Hypotension: Low blood pressure, typically below 90/60 mmHg.
    • Both conditions require accurate measurement for diagnosis and treatment.
  • Importance of Blood Pressure Monitoring
    • Regular monitoring helps in early detection of cardiovascular diseases.
    • It aids in managing chronic conditions like hypertension and diabetes.
    • Monitoring is crucial during pregnancy to prevent complications such as preeclampsia.
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