Pulmonary thromboembolic Disease Flashcards
what is pulmonary oedema
fluid accumulation in the tissue and airspaces of the lungs
what does pulmonary oedema lead to with regards to gas exchange
impaired gas exchange
is pulmonary oedema restrictive or obstructive
restrictive
pulmonary oedema is a cardinal feature of what condition
congestive (L)HF
what are the causes of pulmonary oedema (4)
LV HF (cardiogenic)
injury (non-cardiogenic)
aspiration
severe infection/inflammation
what type of pulmonary oedema is caused by pneumonia
localised
what type of pulmonary oedema is caused by ARDS
generalised
how is pulmonary oedema diagnosed
CXR = presence of fluid
treatment of pulmonary oedema (2)
improve resp function (O2)
treat underlying cause
what is PE
blockage of a pulmonary artery by a blood clot (most common), fat, tumour, or air
what causes PE
DVT of lower limbs
presentation of LARGE PE (4)
cardiovascular shock
low BP
central cyanosis
sudden death/collapse
presentation of SMALL, RECURRENT PE (3)
progressive SOB
pulmonary hypertension
RH failure
what type of pain is associated with PE
pleuritic
what general symptoms are associated with PE (2)
haemoptysis
SOB
risk factors for PE
VIRCHOW’S TRIAD
risk factors for DVT
VIRCHOW’S TRIAD
what is VIRCHOW’S TRIAD
- stasis of blood flow
- endothelia injury
- hyper coagulability
first line investigation for PE
CTPA
first line investigation for PE + renal impairment
V/Q scan
what should D dimers be if PE is present
high
what other investigations could be done in suspected PE (excluding CTPA, V/Q scan, D-dimers)
CXR
ECG
Ultrasound
treatment of PE and DVT
anticoagulation
list anticoagulation medications (3)
- LMW heparin
- NOAC
- oral warfarin
1st line treatment of LARGE PE
thrombolysis
1st line treatment for RECURRENT PE
IVC filter
give examples of NOACs
Dabigatran
Rivaroxaban/Apixaban
mechanism of action of Rivaroxaban/Apixaban
direct inhibitor of activated factor Xa
mechanism of action of Dabigatran
direct thrombin inhibitor
give an example of thrombolysis
tissue plasminogen activator (tPA) = tenecteplase
mechanism of action of oral warfarin
antagonises vitamin K dependent prothrombin
clinical presentation of DVT
hot
swollen
red
tender
1st line investigation of DVT
ultrasound doppler leg scan
investiagtions for DVT (excluding US)
CT scan
what would you take a CT of in a suspected DVT (3)
ileo-femoral veins
IVC
pelvis
method of prevention of DVT (5)
early post-op mobilisation TED compression stocking calf muscle exercises LMW heparin peri-op NOACS
what is a pulmonary infarction
pulmonary tissue death due to compromised blood flow and oxygen supply
what causes pulmonary infarction
emboli + compromised bronchial supply
what is cor pulmonale
RH disease secondary to lung disease
usually RHF due to chronic pulmonary hypertension
clinical signs of cor pulmonale
RV hypertrophy
RV distension
RV failure
what genetic condition is associated with cor pulmonale
Cystic fibrosis
describe the pulmonary system (flow and pressure)
HIGH flow
LOW pressure
what is normal mean pulmonary arterial pressure
12-20mmHg
what value(s) is pulmonary hypertension
> 25mmHg
causes of pulmonary VENOUS hypertension (3)
LV ischaemic disease
mitral regurgitation/stenosis
cardiomyopathy
causes of pulmonary arterial hypertension (7)
primary hypoxic (COPD, fibrosis) multiple PE vasculitis drugs HIV cardiac L to R shunt (ASD, VDS)
describe PRIMARY pulmonary hypertension
rare
occurs in young women
how is PRIMARY pulmonary hypertension diagnosed
exclusion of other secondary causes
symptoms of PRIMARY pulmonary hypertension
progressiveSOB
signs of RH failure
treatment of PRIMARY pulmonary hypertension (3)
anti-cogulation
pulmonary vasodilators (Ca2+ blockers)
lug translant
investigations of pulmonary hypertension
ECG
CXR
clinical signs of pulmonary hypertension
central cyanosis
dependent oedema
raised JVP
what conditions commonly cause Cor pulmonale
COPD
emphysema (alveolar collapse)
what would Cor pulmonale look like on CXR
enlarged pulmonary arteries
R atrial/ventricular enlargement