Respiratory Lab [Lab Practical 2] Flashcards
The female respiratory values are what percentage smaller than males?
20-25%
Male Total Lung Capacity
6,000 ml
Male Inspiratory Reserve Volume
3,000 ml
Male Tidal Volume
500 ml
Male Functional Residual Capacity
2,500 ml
Male Inspiratory Capacity
3,500 ml
Male Expiratory Reserve Volume
1,000 ml
Male Vital Capacity
4,500 ml
Male Residual Volume
1,500 ml
Tidal Volume (TV)
The amount of air inspired or expired during normal, quiet respiration.
The amount of air inspired or expired during normal, quiet respiration.
Tidal Volume (TV)
The total amount of air one’s lungs can possibly hold can be subdivided into
Four Volumes
Inspiratory Reserve Volume (IRV)
The amount of air which can be forcefully inspired above and beyond that taken in during a normal inspiration
The amount of air which can be forcefully inspired above and beyond that taken in during a normal inspiration
Inspiratory Reserve Volume (IRV)
Expiratory Reserve Volume (ERV)
The maximal amount of air which can be forcefully expired following a normal expiration
The maximal amount of air which can be forcefully expired following a normal expiration
Expiratory Reserve Volume (ERV)
Residual Volume (RV)
The amount of air which remains trapped in the lungs after a maximal expiratory effort
The amount of air which remains trapped in the lungs after a maximal expiratory effort
Residual Volume (RV)
In addition to the four volumes, which do not overlap, there are four ____ which are combinations of two or more volumes
Capacities
Total Lung Capacity (TLC)
The total amount of air the lungs can contain–the sum of all four volumes
The total amount of air the lungs can contain–the sum of all four volumes
Total Lung Capacity (TLC)
Vital Capacity (VC)
The maximal amount of air that can be forcefully expired after a maximum inspiration
The maximal amount of air that can be forcefully expired after a maximum inspiration
Vital Capacity (VC)
Functional Residual Capacity (FRC)
The amount of air remaining in the lungs after a normal expiration
The amount of air remaining in the lungs after a normal expiration
Functional Residual Capacity (FRC)
Inspiratory Capacity (IC)
The maximal amount of air which can be inspired after a normal expiration
The maximal amount of air which can be inspired after a normal expiration
Inspiratory Capacity (IC)
Spirometer
The instrument we used to measure the respiratory volumes; a lightweight metal bell inverted in a drum filled with water
The instrument we used to measure the respiratory volumes; a lightweight metal bell inverted in a drum filled with water
Spirometer
Calculating Tidal Volume
Multiply your Tidal Volume by your Respiratory Rate per minute to give your Respiratory Minute Volume
Respiratory Minute Volume = TV X Breathing Rate
(mL air / min) = TV X (breaths/min)
TV = mL air / breath
How did we find tidal volume?
Set spirometer to zero. Take a normal inspiration, place your mouth over the mouthpiece, and exhale a normal expiration into the spirometer
How did we find expiratory reserve volume?
Set the spirometer to zero. After a normal expiration, place your mouth over the mouthpiece and forcefully exhale as much air as possible into the spirometer
How did we find vital capacity?
Set spirometer to zero. Inhale as deeply as possible; place your mouth over the mouthpiece, hold your nose, and exhale into the spirometer with a maximal effort. Then use the table for predicted vital capacity based on your age, height, and sex
How do we calculate the inspiratory reserve volume (IRV)?
Vital Capacity - Tidal Volume - Expiratory Reserve volume
How do we calculate the Inspiratory Capacity (IC)?
Vital Capacity - Expiratory Reserve Volume
In this test the subject takes five deep breaths and then holds his breath as long as possible after the last inspiration. Gives an indication of the person’s functional respiratory reserve and efficiency of his respiratory system. Often a better index of respiratory reserve than is the traditional vital capacity measurement.
Heymer Test
Heymer Test
In this test the subject takes five deep breaths and then holds his breath as long as possible after the last inspiration. Gives an indication of the person’s functional respiratory reserve and efficiency of his respiratory system. Often a better index of respiratory reserve than is the traditional vital capacity measurement.
Normal male values for the Heymer test
50-70 seconds
Normal female values for the Heymer test
50-60 seconds
Measures the volume of gas that passes through it
Dry gas meter
Bag that collects the air you breath into it
Douglas bag
Units for Minute Volume (Vm)
ml air / min
Units for breathing rate (BR)
Breaths / minute
Units for heart rate (HR)
beats / minute
In the respiratory system, the flow of air is called the
Minute Volume (Vm)
In the circulatory system, the flow of blood is called the
Cardiac Output (CO)
How do we calculate metabolic rate or oxygen consumption (VO2)?
VO2 = (Vm)(CO2i - CO2e) = (CO)(CO2a - CO2v)
ml O2 / min
In most resting people, arteriole blood is 100% saturated w/ oxygen, but mixed venous blood is only
60% saturated
How did we calculate the oxygen content of arteriole blood (CO2a)?
Assuming you have the average hemoglobin concentration and each gram of hemoglobin can bind with 1.3 ml of O2
CO2a = (13.3 g hemoglobin / 100 ml blood) X (1.3 ml O2 / 1 g hemoglobin)
How did we calculate the oxygen content of venous blood (CO2v)?
CO2v = 0.6 (CO2a)
In our hw how did we calculate cardiac output (CO)?
CO = VO2 / (CO2a-CO2v)
[ml blood/min]
In our hw how did we calculate stroke volume?
SV = CO / HR
[ml blood / beat]
In our hw how did we calculate total peripheral resistance (TPR)?
TPR = mean arterial pressure / CO
closely equal to;
[(systolic + 2 diastolic)/3] / CO
