Tactical Medicine News Blog

Kline et al developed a clinical decision tool based on parameters that could be obtained from a brief initial assessment to reasonably exclude the diagnosis of pulmonary embolism (PE) without the use of D-dimer in order to prevent unnecessary cost and the use of medical resources. 1 Many of us have used the Pulmonary Embolism Rule-out Criteria (PERC) rule by now, but we should be clear on what it includes. Are we using it appropriately?

Patients who leave the emergency department against medical advice (AMA) are at an increased risk of having a bad medical outcome, and can be a source of significant medicolegal risk to providers. Earlier we reviewed eight elements to address when signing a patient out AMA. There are two common myths regarding patients who leave AMA that can complicate an already difficult situation.  

As you are aware there has been lots of discussion going on about the concept of flipping the  classroom in education these days. ALiEM recently hosted a book club where Salman Khan’s book (The One World School House: Education Reimagined) was featured in a Google Hangout. Khan, an ex-hedge fund manager, started making videos to help his niece with her math homework years ago. These videos ended up on YouTube and became quite popular. It wasn’t until later with the help of Bill Gates that he formed The Khan Academy and popularized the concept of the flipped classroom.

Let’s face it. You’ve heard about the A-a gradient. And free water deficit. And even the APACHE-II score. But how useful are these in your daily practice? You don’t care that much if a patient has shunt physiology in the first case, nor exactly how much free water they’re lacking in the second. And in the third case, your clinical acumen is probably pretty good at predicting a sick patient’s mortality already. But what about the new medical scores of BISAP, EHMRG, and ORT?

Troponin testing is an important component of the diagnostic workup and management of acute coronary syndromes (ACS). The increasing sensitivity of troponin assays has lowered the number of potentially missed ACS diagnoses, but this has also created a diagnostic challenge due to a decrease in the specificity of the test. From 1995 to 2007, the limit of troponin detection fell from 0.5 ng/mL to 0.006 ng/mL (see below graph). Robert Jesse summed up this frustration with the following quote: When troponin was a lousy assay it was a great test, but now that it’s becoming a great assay, it’s getting to be a lousy test.