Lab Practical Instructions
• Put your stuff down in the back and sit down (all
you need is a pen/pencil)
• Take an answer sheet
• When we begin, you will have 60 sec per station
• When timer beeps, move over one station.
Remain seated except when changing seats
• You will have the chance to see a few stations
again at the end
Practical Instructions
• Scopes: all are set up and focused, with
pointers in the right eyepiece pointing to
relevant structures
• Hearts: flags mark structures
• Model: tape marks structures
• Vessel diagrams: Numbered lines point to
vessels to name
Practical instructions
• There are 6 stations per row in the 4 main rows
and 2 stations on the side for a total of 26
• Each station has two questions, an A and a B
each worth 1 point
• There are 2 extra credit points possible)
• Write your answers in the blanks.
• Start writing in the blank numbered the same as
the station you are at.
• Move as follows (One seat at a time):
Front of room
6
5
4
3
2
1
7
8
9
10
11
12
26
18
17
16
15
13
25
20
21
19
22
14
23
24
Door
Lab 37A
Measuring Respiratory Physiology
Key Respiratory Capacities
• Tidal volume: the normal amount you breathe in
and out at rest.
• ERV (expiratory reserve volume): the amount of
air you have left in your lungs after you exhale
normally
• Vital capacity: Total air volume available.
• IRV (inspiratory reserve volume): the amount of
air you can inhale after you inhale normally
• Residual volume: air left in lungs after maximal
exhalation.
Spirometers
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•
•
•
•
We will be measuring expiration only.
Do not do it if you are sick
Use a disposable mouthpiece
Use wet flow spirometer to measure:
Tidal volume: exhale just as you are doing right now,
listing to me talk (no, I don’t mean snoring). Should be
around 500ml (.5L)
• ERV (expiratory reserve volume): exhale normally,
pause, hold your nose and exhale as much more as you
can into the tube
• Vital capacity: inhale max, exhale max, then inhale max
again, clip nose, and exhale as much as possible into
the hose
To do:
• Activity 1: operate the model lung
• Activity 2: listen to respiratory sounds
• Activity 3: gather data on nonrecording
spirometers (groups of 3-4) and follow along with
manual pages 552-54:
• Measure respirations per minute (have a partner
count your breaths)
• Measure 3 times, record in lab manual, and
calculate avg for:
– TV
– ERV
– VC
To do:
• Calculate IRV
• Compare to tables (557-58) based on age,
height, and sex
• Put your final data into the tables on p.563
“Pulmonary Measurements” and 564 “Calculated
Pulmonary Capacities.”
• Answer the 3 questions after the table on p.564
• For minute respiratory volume (MRV) and IRV,
read your lab manual to determine how to
calculate these values.
• VC = TV+ IRV + ERV
Assignment
• Pages 552-554 with data
• Pages 563, 564 with data entered into 2
tables titled “Pulmonary Measurements”
and “Calculated Pulmonary Capacities”
and answers to the three questions on p.
564
• Review Sheet numbers 1-13 ONLY on
pages 569-71
• Due next Thurs