Can we fight against Pulmonary Embolism using the LR’s arrows?

Clinical Scenario

A 80 y/o woman presented to the ED for dyspnoea.

She underwent a knee replacement 2 weeks ago, RR is 24, O2 saturation is 88%. HR is 90, the knee is edematous.

You are going to hunt a pulmonary embolism (PE)

While you phone the radiologist for a thorax CT scan you have an idea:

Can a compression ultrasonography (CUS) helps to avoid a CT?

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What does it hide behind a negative X-Ray?

Clinical Scenario

A 33 y/o woman, comes to the ED because of a sudden emithorax pain on the left in basal region. The pain is described as stabbing, well localized, it worsen with inspirium …a pleuritic pain, no cough, no fever, not hemoptysis. She smokes, she does not take any medication. 

Chest x ray is normal. You receive blood test: WBC 7.500/mcL, CRP 20 mg/dl , D-dimer 603 ng/ml.

Maybe is not a wall chest pain, but in which direction this test are carrying you?

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Pleuritic pain and radio-occult lesion

Clinical Scenario

A 33 y/o woman, comes to the ED because of a sudden emithorax pain localized on the left in basal region. The pain is described as stabbing, well localised, it worsen with inspirium …a pleuritic pain, no cough, no fever, not hemoptysis. She smokes, she does not take any medication. Chest x ray is normal. 

Is it a wall chest pain or there migth be something else? 

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Does procalcitonin have a role in the management of acute appendicitis?

Clinical scenario

A 18 yo man comes to the ED in the morning because of low abdominal pain, fever and nausea. At palpation there is mild pain in the right inferior quadrant, not guarding.

Could procalcitonin (PTC) helps to exclude quickly an acute appendicitis?

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