Master Pulmonary Embolism Causes with Picmonic for Medicine

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Pulmonary Embolism Causes

Lungs Elmo
Picmonic
Pulmonary embolism is a blockage of the main artery of the lung or one of its branches by a substance that has travelled from elsewhere in the body through the bloodstream. Though most causes are due to deep vein thrombosis, a minority of cases occur because of fat emboli, air, bacteria, amniotic fluid and tumors.
10 KEY FACTS
CAUSES
FAT BAT Mnemonic
FAT-BAT-guy

The mnemonic FAT BAT is useful to help recall the common causes of pulmonary embolism. These emboli sources are fat, air, thrombus, bacteria, amniotic fluid and tumor.

Fat
Fat

Fat emboli can occur from fracture of long bones, and are also associated with liposuction.

Air
Air

Air can travel through the circulatory system and when in an artery, may directly stop blood flow to an area fed by the artery. Common causes of air emboli include surgery, trauma, scuba diving and being on a ventilator.

Deep Vein Thrombosis (DVT)
Trombone

Pulmonary embolism most commonly occurs from thrombus formation which embolizes. A classic example of this is a DVT of the leg embolizing into the pulmonary arteries.

Bacteria
Bacteria-guy

A cause of bacterial embolism is when an area of the body becomes infected with bacteria, resulting in the formation of pus. These may become dangerous if dislodged from their original location. Like other emboli, a septic embolism may be fatal.

Amniotic Fluid
Onion Fluid

Though rare and not completely understood, amniotic fluid can lead to pulmonary embolism. When amniotic fluid enters the mother's blood stream via the placental bed of the uterus and trigger an allergic reaction. This reaction then results in cardiorespiratory collapse.

Tumor
Tumor-guy

Embolism can also occur from tumors which have broken off an made their way into the blood stream.

RISK FACTORS
Hypercoagulable
Hiker-clogs

Patients who are hypercoagulable are at increased risk for thrombus formation, which can then embolize into pulmonary flow.

Central Venous Lines
C-center Vine into vein

Central venous lines can increase risk of pulmonary embolism. This is because as the line is changed (to prevent infection), clots may be released and can embolize from the catheter into pulmonary vasculature.

Immobilized
Immobilized

Patients who are immobile are at risk for thrombus formation and DVT. This can then embolize into the lungs.

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