Resp short answer Flashcards
the maximum volume of air that can be voluntarily healed following a maximum inspiration
vital capacity
Air flow into the lungs during inspiration because …….. muscles contract and the thoracic volume …….
external intercostal and diaphragm
increases
Mr tickle has a resp rate of 10 breaths per minute. Tidal volume of 700ml and dead space volume of 200ml
what is his alveolar ventilation?
700-200
x10
5000ml/min
partial pressure of oxygen in mixed venous blood is
40 mmHg
Arterial partial pressure of oxygen will be reduced in which of the following conditions?
Anaemia
CO poisoning
Emphysema
Traumatic peripheral haemorrhage
Emphysema
Which of the following is NOT true of people with chronic lung disease?
Arterial PCO2 levels are elevated
NO is a safe sedative to use
they’re on a hypoxic drive
they have decreased sensitivity to PCO2
they rely on peripheral chemoreceptors for stimulating ventilation
NO is a safe sedative to use
NOT TRUE
Shunt is the term given when
perfusion exceeds ventilation
Which of the following shift the oxygen haemoglobin curve to the right?
asthma attack
shift curve left or right?
marathon
right
increase in temperature, CO2 etc
Shift curve left or right?
hypothermia
left
decrease in temperature
Shift curve left or right?
Foetal haemoglobin
left
it has a higher affinity for oxygen than the adult haemoglobin)
Shift curve left or right?
respiratory alkalosis
left
reduces PCO2
Shift curve left or right?
voluntary hyperventilation
decreases PCO2 so shift would go to the LEFT
A 59 year old man with known squamous carcinoma of the lung is admitted to hospital as an emergency with abdominal pain, constipation and confusion.
what is the most appropriate investigation?
serum calcium
symptoms are for hypercalcemia due to parathyroid related hormone
35 year old man has cystic fibrosis - the most likely organism infecting his lungs would be
pseudomonas aeruginosa
