week 6 Flashcards
what are the subsections of non rem sleep 4
alpha
beta
theta
delta
what causes reduced breathing during sleep 4
reduced drive of breathing
reduced metabolic activity
increased airway resistance
decreased muscle tone of
intercostal muscles when lying down
definition of obstructive sleep apnoea
cessation of airflow due to upper airway resistance and obstruction resulting in partial/complete collapse
three components required in diagnosis of sleep apnoea, which of these is key
blood oxygen testing
home sleep apnoea
polysomnography
what is assessed in polysomnography 7
EMG
EOG
EEG
Pulse oximetry
Abdominal bands
Airflow
Microphone
mallampati score
evaluate the difficulty of incubation and severity of sleep apnoea based off the visibility of oral structures
acute social and lifestyle implications of sleep apnoea 4
day somnolence
headaches
cognitive impairement
partners affected by snoring
chronic complications of sleep apnoea
pulmonary hypertension
CVD disease
uncontrolled hypertension
central sleep apnoea
complete cessation of airflow due to lack of control from brainstem respiratory centres
no breathing with no chest or abdominal effort
causes of obstructive sleep apnoea
high BMI
large neck diameter
obesity
causes of central sleep apnoea
heart failure, drugs, neuromuscular disorder
4 forms of management for sleep disordered breathing
CPAP
mandibular splint
surgery
lifestyle modifications
type 1 RF (def + reason why)
hypoxaemia
due to gas exchange failure
type 2 RF (def + reason why)
hypercapnia
due to pump ventilation failure
reasons for gas exchange failure 5
fluid in alveoli
alveolar collapse
alveolar damage
pulmonary vascular narrowing
airway narrowing
reasons for pulmonary ventilation failure 4
CNS depression
chest cage restriction
neuromuscular weakness
nerve dysfunction
what physiological responses from hypoxemia and hypercapnia 4
dyspnoea
tachypnoea
diaphoresis
accessory muscle usage
hyopxic drive
innate mechanism to continue respiratory drive due to low oxygen levels, however as oxygen levels increased, increased offloading of co2 into the blood as a result of the haldane effect resulting in oxygen induced hyercapnia
results of hypoxemia 3
hypoxia
lactic acidosis
organ damage
results of hypercapnia 3
cerebral dysfunction
cardiopulmonary effects
respiratory acidosis
hypercapnia compensatory mechanism in acid base balance maintenance
kidneys increase bicarbonate levels which absorb carbon dioxide
hence bicarbonate levels determine whether T2RF is chronic or acute
treatment options for type 1 RF + type 2RF
oxygen therapy + controlled oxygen therapy
what is non invasive ventilation?
BPAP machine which uses a higher positive pressure on inspiration and lower positive pressure on expiration
types of oxygen therapy delivering methods
nasal specs aka nasal canula
CIG mask aka simple oxygen mask
high flow O2
non invasive ventilation aka BPAP
ECMO
what is extracorporeal membrane oxygenation ECMO
draws blood from the patient and oxygenates it blood outside the body and removes CO2
ABG
will test oxygen, carbon dixoxide, pH and bicarbonate levels to distinguish between type 1+2 RF
what is the ABG of asthma and COPD
hypoxaemia with likely hypercapnia
type 1 hypersensitivity reaction
allergen triggered IgE reaction