Week 2 - Pulmonary Emboli Flashcards
what is a pulmonary embolism
- blockage of pulmonary arteries by a thrombus, fat or air embolus, or tumour tissue
what is a pulmonary embolism commonly caused by
- DVT that travels
what effect does a pulmonary embolism have
- travels thru blood vessels until it lodges and obstructs perfusion to the alveoli
what part of the lungs are commonly affected by pulmonary emboli? why?
- lower lobes
- bc of higher blood flow
what are risk factors for pulmonary embolism (10)
- immobility
- surgery within the last 3 mo
- stroke
- paresis
- paralysis
- hx of DVT
- malignancy
- obesity in women
- heavy cigarette smoking
- HTN
what is the classic traid of a pulmonary embolism symptoms
- dyspnea
- chest pain
- hemoptysis
what are other symptoms of a pulmonary embolism (12)
- hypoxemia
- low PaCO2
- cough
- pleuritis chest pain
- hemoptysis
- crackles
- fever
- change in mental status (r/t hypoxemia)
- hypotension
- pallor
- severe dyspnea
- tachy
what are complications for a pulmonary embolus (4)
- pulmonary infarction –> alveolar necrosis –> hemorrhage
- infection of the necrotic tissue
- development of an abscess
- pulmonary HTN
what diagnostics might be used to diagnose a pulmonary embolus (5)
- spiral CT scan
- VQ scan
- D dimer
- pulmonary angiography
- ABG analysis (imp. but not diagnostic)
what does a spiral CT scan do
- injection of IV contrast media to see blood vessels
- scanner continuously rotatoes to get visualization of all anatomical regions of the lungs
- data is reconstructed to create a 3D picture
what is a d dimer test
- test that measures the amt of cross-linked fibrin fragments (which are found in the circulation after clotting events)
what does prevention of a pulmonary embolism begin w
- prevention of VTE
how can a VTE be prevented (3)
- use of compression devices
- early ambulation
- prophylactic use of anticoag meds
when is treatment of pulmonary embolism completed?
- as soon as PE is suspected
what does treatment of PE consist of (3)
- drug therapy
- surgical therapy
- supportuve therapy