Expert answer:Lab Report

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LM 4.4
Cardiovascular
System: Blood
Pressure LAB
SPRING 2017
Objectives
▪ Explain how systemic arterial blood pressure is normally
measured.
▪ Differentiate between hypotension, normal blood pressure, and
hypertension.
▪ Complete the lab report on blood pressure.
2
Measuring systemic arterial blood pressure
▪ Sphygmomanometer
▪ 1st sound: systolic
pressure
▪ Sound lost: diastolic
pressure
Fig. 5.7 (Mader & Windelspecht, 2015)
3
Procedure for measuring BP
▪ Obtain a sphygmomanometer and stethoscope.
▪ Wipe the cuff and ear pieces gently with alcohol wipes.
▪ Dry the cuff gently with paper towel.
▪ Place the cuff around the brachium so that it’s snug but not tight.
▪ Place the stethoscope over the brachial artery.
▪ Quickly inflate the cuff to 150 mm Hg. (Go higher if needed.)
▪ Slowly let the air out. The first sound will be the systolic pressure.
When you first stop hearing sound, that’s the diastolic pressure.
▪ Record data:
▪ Upper number = systolic pressure; lower number = diastolic pressure
4
Experiment
▪ Have the student breath deeply and relax for at least 30 seconds.
▪ Use the sphygmomanometer to measure resting BP. Record data.
▪ Have the student run quickly in place for 90 seconds.
▪ Immediately have student sit and measure post-exercise BP while a
third member of the group starts a 2-minute timer. Record data.
▪ At the end of two minutes of rest after exercise, measure blood
pressure again. Record data.
▪ Repeat to get data from 2 people per group (minimum of 10 from
class).
5
Student condition information
▪ Test subjects were asked if they:
▪ lead a sedentary lifestyle?
▪ do aerobic exercise on a regular basis?
6
Experimental data – Data collected from a previous
class
Student condition
Relaxing BP
Immediate post exercise
BP
2-minutes resting
BP
Diff. between rest pre- &
post- systolic & diastolic
Aerobic exercise daily
132/58
154/68
148/62
16 systolic; 4diastolic
Active/aerobic
exercise daily
120/60
150/80
120/60
0 systolic; 0 diastolic
Sedentary
120/76
140/80
130/80
10 systolic; 4 diastolic
Sedentary
100/65
140/45
120/65
20 systolic; 0 diastolic
Active
120/70
175/102
130/80
15 systolic; 10 diastolic
Sedentary
130/70
159/40
132/44
2 systolic; -26 diastolic
Active
135/55
156/56
135/55
0 systolic; 0 systolic
Active
137/50
160/60
135/55
-2 systolic; 5 diastolic
Active/aerobic daily
exercise
144/64
174/76
144/70
0 systolic; 6 diastolic
7
Lab report
▪ Write an hypothesis regarding the effect of exercise on blood
pressure.
▪ Include data table. At the beginning of the results, state that the
data we used was collected by students in a previous semester.
▪ Explain your results and whether they support or refute your
hypothesis. Did exercise increase BP? Did BP decrease after
resting? Why are these expected?
▪ Use the table on next slide to determine whether any students had
abnormal blood pressures at rest. Use the information you collected
about student condition to explain.
▪ Be sure to include your APA-style reference citations! (textbook/lab
manual)
8
Normal & abnormal blood presssures
(Mader & Windelspecht,
2016)
9
References
▪ Mader, S. S. (2016). Lab 8: Cardiovascular system. In Laboratory manual
human biology (14th ed.). New York, NY: McGraw-Hill Education.
▪ Mader, S. S., & Windelspecht, M. (2016). Chapter 5: Cardiovascular
system: Heart and blood vessels. In Human biology (14th ed.). New York,
NY: McGraw-Hill Education.
10
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