1. Measuring Blood Pressure

2. Diagnostic Criteria for HTN Two or more separate occasions – BP > 140/90 –Average of Seated Standing for > 2 min Seated with back support - arm at heart level After five minutes of rest If readings differ by more than 5 mm Hg additional readings should be taken and averaged Additional readings if suspect "white coat" hypertension

3. Sources of Error in BP Measurement Wrong size of cuff Hearing, concentration, skill of tester Placement on arm Anxiety or stress (white coat) Bladder distention Caffeine Exercise

4. Steps for Accurate Blood Pressure Quiet environment Rest for 5 minutes No smoke, food, exercise, or caffeine within 30 minutes prior Cuff size: –Bladder width at least 40% of arm circumference –length at least 80% of circumference. Lannec stethoscope

5. Blood Pressure (cont) Use mercury (calibrated) cuff and a good stethoscope Center and wrap cuff around brachial artery on bare arm Rapidly inflate cuff to 30 mmHg above level where radial pulse is unpalpable. Deflate cuff at a rate of 2 to 3 mm per second.

6. http://cwx.prenhall.com/bookbind/pubbooks/silverthorn2/medialib/Image_Bank/CH15/FG15_07a.jpg

7. Measuring BP

8. Korotkoff sounds

9. Blood Pressure (cont) Note systolic pressure at onset of at least two consecutive beats (Phase I). Record in even numbers read to nearest 2 mmHg. Note diastolic pressure at muffling (Phase IV) for children and cessation of sound (Phase V) for adults. Rapidly deflate cuff after measuring diastole Record arm (L or R) and systolic/diastolic pressure

10. Blood Pressure (cont) Wait 1 to 2 minutes before repeating the reading and average the two readings. If differ by more than 5 mmHg, then repeat. Use table to classify and provide follow-up recommendations. Measure both arms – if BP > 15 mmHg – higher mortality

11. Blood Pressure (cont) Thigh BP Mid thigh cuff listen over popliteal artery

12. Questions? In-Class Activity/Assignments http://vimeo.com/8068713 http://www.mayoclinic.org/diseases- conditions/high-blood- pressure/multimedia/how-to-measure- blood-pressure/vid-20084748

13. SBP DBP <120 and <80 120-139 or 80-89 140-159 or 90-99 >160 or >100 Category Normal Prehypertension Hypertension, Stage 1 Hypertension, Stage 2 Diagnosis Resources: http://www.nhlbi.nih.gov/guidelines/hypertension/index.htm Hypertension. 2005;45:142-161. * http://www.guideline.gov/summary/summary.aspx?doc_id=8326http://www.guideline.gov/summary/summary.aspx?doc_id=8326 On separate occasions of at least two readings: average of seated and after standing for > 2 min on 3 separate days.

14. Recommendation: Check in 2 yrs Recheck in 1 yr Confirm in 1 month Evaluate immediately or within 1 week Initial BP: Normal Prehypertension Hypertension, Stage 1 Hypertension, Stage 2 What recommendations should we provide? http://www.nhlbi.nih.gov/guidelines/hypertension/index.htm