The Blood Pressure Taken Over a Sweater
At 7:10 am you take Mrs. Cole's blood pressure. She is 68 and takes lisinopril. She has just finished a cup of coffee and has been talking to you cheerfully about her grandson. You sit her on the edge of the bed, wrap the cuff over her sweater sleeve on her right arm, let the arm hang at her side, and get 168/94. Her pulse is 88 and regular, respirations 18, temperature 98.4 °F oral. Yesterday's recorded pressure was 128/78. She says, "I feel fine - that thing is probably wrong." She has no headache, chest pain, dizziness, or vision changes.
1. What is wrong with how you took the reading, and what do you do before you report anything?
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Nearly every part of that measurement is a setup for a falsely high number:
- Cuff over a sleeve - clothing adds bulk and reads high.
- Arm unsupported and hanging - hydrostatic pressure adds roughly 10 mmHg or more.
- Talking during the measurement - raises the reading.
- Coffee just finished - caffeine and recent activity both push pressure up.
- No rest period - you started the moment she was chatting.
Redo it properly: sleeve off, cuff on bare upper arm with the correct cuff size, cuff at heart level, arm supported on a table or your hand, back supported, feet flat, no talking for the rest period. Let her sit quietly for about five minutes first. Deflate slowly, 2–3 mmHg per second. Palpate first if you are unsure of the estimated systolic. Confirm the cuff and the arm used against her record.
The first number gets discarded as technique error, not reported as a finding - but it does not get hidden either; note that a repeat was done and why.
2. You repeat it correctly and get 158/92. What do you report, to whom, and how quickly?
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Report to the nurse now, at the time of the reading, not at the end of the shift. 158/92 is elevated and meaningful compared with her 128/78 baseline, but it is not the emergency zone (systolic 180 or higher with symptoms, or diastolic 120 or higher, warrants urgent escalation per facility protocol).
Give her the whole picture, not just a number:
- Both readings, in order: "168/94 over a sleeve, arm unsupported; repeated after 5 min rest, bare arm, supported, 158/92, right arm."
- Her baseline: 128/78 yesterday.
- Pulse 88 regular, respirations 18, temp 98.4 °F.
- Symptoms screened and absent: no headache, chest pain, dizziness, vision change.
- Recent coffee, and that she takes lisinopril - a dose may have been missed; that is the nurse's question to ask.
Delay matters here: an unrecognized rise in a resident on an antihypertensive is exactly the trend the nurse needs before the next dose is due.
3. What do you write in the chart, and what would be wrong to write?
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Chart:
- "0710 BP 168/94, right arm, cuff over sleeve, arm unsupported, resident had just finished coffee and was talking."
- "0718 BP repeated after 5 min seated rest, right arm, bare arm, arm supported at heart level, correct cuff size: 158/92."
- "Pulse 88 regular, respirations 18, temp 98.4 °F oral. Denies headache, chest pain, dizziness, visual changes."
- "Nurse notified at 0725."
- The full set of vitals, including the ones that were normal.
Wrong to write: "BP 168/94 - rechecked, normal." You do not get to declare 158/92 normal; normal is the nurse's or provider's call against her baseline. Also wrong: recording only the second number as if the first never happened, writing "resident states she feels fine so no action needed," or charting a diagnosis. Note that she said it felt fine only as a quote, not as your assessment.
Both readings in the record let the next person see the trajectory rather than a single isolated figure.