Final answer:
Inaccurate blood pressure readings can be caused by factors such as incorrect cuff size, the patient's posture, emotional state, and the position of the manometer relative to the heart. Ensuring proper techniques and understanding the impact of these variables is essential for accurate measurements.
Step-by-step explanation:
There are several factors that might give you inaccurate results when taking a patient's blood pressure (BP). Proper technique involves using a blood pressure cuff and a stethoscope to measure the pressure. However, incorrect cuff size, not placing the cuff at the level of the heart, patient's posture during the measurement, and the patient's emotional state like stress or the phenomenon known as 'white coat syndrome' can all affect the readings.
Additionally, the position of the manometer in relation to the patient's heart level can influence the readings. If the manometer is lowered, the measured blood pressure may appear higher than it actually is. Conversely, raising the arm above the shoulder can lead to a lower reading. Similarly, placing the cuff on the upper leg with the person standing can provide an inaccurate reading due to the pressure created by the weight of the fluid (blood) in the limb. Thus, ensuring standard measurement practices, such as having the patient seated with the arm supported at chest level, is crucial.
Following correct protocols and being aware of potential variables that can affect blood pressure measurements are important in obtaining accurate readings. Digital blood pressure monitors for home use have made it easier for patients to track their blood pressure more consistently and can aid physicians in diagnosis.