Respiratory Flashcards
Name the order of stages of respiratory development and the weeks
embryonic (4), pseudoglandular (5-16), canalicular (16-26), saccular (26-birth), alveolar (32-birth)
Malformations associated with Potter sequence
bilateral renal agenesis, pulmonary hypoplasia, diaphragmatic hernia
collapsing pressure =
2*tension/radius
goblet cells end at this level in lung
end of bronchi
cartilage ends at this level in lung
end of bronchi
smooth muscle ends at this level in lung
terminal bronchioles
pseudostratified epithelium ends at this level in lung
ends with terminal bronchioles
inspiratory capacity =
inspiratory reserve + tidal
functional residual capacity =
Expiratory Reserve + residual
vital capacity =
expiratory reserve + tidal + inspiratory reserve
physiologic dead space =
anatomic ds + alveolar ds
= Vt (PaCO2 - PeCO2) / PaCO2
where little a is arterial
Va (alveolar ventilation) =
(Vt-Vd)*RR
Oxygen content =
1.43HbSaO2 + 0.003PaO2
Resistance (of fluid/air) =
8nl/pir4
Pa/A/v and V/Q in Zone 1
PA > Pa > Pv. V/Q = 3
Pa/A/V and V/Q in Zone 2
Pa > PA > Pv. V/Q = 1
Pa/A/v and V/Q in Zone 3
Pa > Pv > PA. V/Q = 0.6
Haldane effect
high O2 unloads CO2
Bohr effect
high CO2 unloads O2
Winter’s formula is used for
acidosis only. pH = 1.5*bicarb + 8
anterior epistaxis from
Kiesselbach plexus
posterior epistaxis from
sphenopalatine artery, a branch of maxillary artery
Reid ratio is relevant in this disease
chronic bronchitis
ferruginous bodies in this pneumoconiosis
asbestosis
