00:01
Hello students now, let's see about the respiratory volumes and capacities so about respiratory volumes and capacities so given are the following respiratory volumes and now let us match it with the correct options so residual volume the correct answer is option d that is the volume of air that remains in the lungs after most forceful exhalation and expiratory reserve volume this denotes the maximum volume of air that can be expired after normal exhalation so option c is the right answer and the vital capacity it is the maximum volume of air that a person can inhale or exhale and it is denoted by the option g and the inspiratory capacity it is the maximum amount of air that can be inspired after a normal exhalation the correct answer is option and the total lung capacity it denotes the maximum volume of air that the lungs can hold after maximum forceful inhalation and is denoted by the correct answer is option i and inspiratory reserve volume it is the volume of air that can be forcefully inspired after normal inhalation so the correct answer is option e and the expiratory capacity it is the maximum volume of air that can be forcefully exhaled after normal inhalation so the correct answer is option h and the tidal volume tidal volume is defined as the amount of air that is usually normally expired or inspired and is given by the option a and the functional residual capacity it is the volume of air remaining in the lungs after a normal exhalation so it is given by the option f and now moving to the second part we need to calculate the respiratory minute volume that is v and alveolar ventilation now let us consider it as v ' so we are given with two patients patient a and patient b.
03:00
So the given is the respiratory rate what are the values given are the respiratory rate and tidal volume is given so the patient a's respiratory rate is 15 breaths per minute and the tidal volume of patient a is 600 ml and for the patient b the respiratory rate is 18 breaths per minute and the tidal volume it is 500 ml given for both the patients the dead space the anatomical dead space is 150 ml so now let's calculate for each patient.
03:59
Let's consider the first one patient a for patient a now let us calculate the respiratory minute volume that is v.
04:13
V is given by the respiratory minute volume v is given by the respiratory rate into tidal volume.
04:32
So this is the formula we are using here.
04:40
So we could now include the value so the respiratory rate of patient a is 15 breaths per minute.
04:49
So 15 breaths per minute into the tidal volume that is 600 ml which is now 9 ,000 ml per minute so what is this? this is the respiratory minute volume and now calculating the v ' that is the alveolar ventilation is given by the formula respiratory rate into the tidal volume minus the anatomical dead space.
05:31
So this is the formula for v ' that is the alveolar ventilation so to calculate the alveolar ventilation now, we are just including the values that is 15 breaths per minute into 600 ml minus the anatomical dead space 150 ml...