Patient Intake and Vital Signs Measurement Flashcards

A medical assistant is preparing to take a patient's radial pulse. Which technique is MOST accurate?

Answer: Use two or three fingers (not the thumb) over the radial artery, count for a full 60 seconds, and assess rate, rhythm, and volume

The thumb has its own pulse that can interfere with the count; using 2–3 fingertips lightly over the radial artery and counting for a full 60 seconds provides the most accurate rate assessment and allows evaluation of rhythm regularity and pulse volume.

What is the significance of the Korotkoff sounds when measuring blood pressure auscultatorily?

Answer: They are the sounds heard through the stethoscope as the cuff deflates; the first sound (phase I) marks systolic pressure and the disappearance of sound (phase V) marks diastolic pressure

Korotkoff sounds are arterial turbulence sounds heard during blood pressure auscultation; Phase I (first tapping sound during cuff deflation) = systolic pressure; Phase V (cessation of all sound) = diastolic pressure in most adults.

Which of the following is a common source of error when measuring blood pressure that leads to a falsely HIGH reading?

Answer: Using a cuff that is too small for the patient's arm circumference

A cuff that is too small for the arm (bladder does not encircle at least 80% of the arm) requires more pressure to compress the artery, producing a falsely elevated reading — this is known as 'cuff hypertension.'

How is body mass index (BMI) calculated, and what BMI range is considered 'obese'?

Answer: BMI = weight (kg) ÷ height (m²); BMI ≥30 is classified as obese

BMI is calculated as weight in kilograms divided by height in meters squared; the WHO and CDC classify a BMI of 30.0–34.9 as Class I obese, 35.0–39.9 as Class II obese, and ≥40 as Class III (morbidly) obese.

What is the correct method for measuring the weight of a patient using a clinical balance beam scale?

Answer: Have the patient remove shoes and heavy outer clothing, stand centered on the platform, adjust weights to balance the beam, and read to the nearest 0.5 pound or 0.1 kg

For accurate weight measurement, patients should remove shoes and heavy outerwear; stand centered and still; the balance beam is zeroed first, then adjusted to achieve exact balance; weight is read when the beam rests mid-point.

What does the pain scale (0–10 Numeric Rating Scale) assess, and what is the medical assistant's role when a patient reports a pain level of 8/10?

Answer: It assesses subjective pain intensity; report the finding to the provider immediately and document location, character, onset, radiation, and alleviating/aggravating factors

The Numeric Rating Scale (NRS) is a self-report tool where 0 = no pain and 10 = worst imaginable pain; a rating of 8/10 is severe pain requiring immediate provider notification and thorough pain assessment documentation.