D-dimer has been shown to increase with age, which can cause a lower specificity (i.e. more false positive tests) in older patients. The result of this would be that older patients would often have more diagnostic imaging or downstream testing, but on the other hand, maybe a higher cut-off d-dimer value may lead to increased false negative cases (i.e. missed venothromboembolism) and make this strategy less safe. Recently, I wrote a post on age-adjusted d-dimer testing on REBEL EM, but since that post there was a new article that was published in Chest 2014. This post, will specifically focus on an update of age-adjusted d-dimer testing based on the above article. Read more →
Welcome to REBELCast Episode 1, where Matt, Swami, and I are going to tackle a couple of scenarios to help your clinical practice. Today, we are going to specifically tackle two different topics:
- Topic #1: Clinically Important Biphasic Anaphylaxis
- Topic #2: Total Lymphocyte Count (TLC) as a Surrogate Marker for CD4 Counts
For those who haven’t checked out the site already R.E.B.E.L. EM stands for Rational Evidence Based Evaluation of Literature in Emergency Medicine. (Ed: name changed 2/2016) The blog was launched in October 2013, and continues to grow every month, and with that growth we are excited to announce the introduction of REBEL Cast. Read more →
Typically, the initial evaluation of blunt trauma patients involves a supine anteroposterior (AP) chest x-ray (CXR) which has a poor sensitivity for the detection of pneumothorax (PTX), and has been reported as low as 20% – 48%. Following the CXR computed tomography (CT) has been the standard for the diagnosis of pneumothorax. The use of ultrasonography to diagnose pneumothorax was first described in 1986 in animal studies. Since then there have been many studies that have shown bedside ultrasound can rapidly detect pneumothorax, helping avoid serious potential consequences (i.e. tension pneumothorax), especially in patients requiring mechanical ventilation. There are several different sonographic signs that can be used to detect pneumothorax, specifically, sonographic lung sliding. But how good is ultrasound for the detection of pneumothorax?
Please welcome a new development in critical care publishing with the launch of a new open access critical care journal: CRITICAL CARE HORIZONS!!! This will be a fresh, new, original voice in the critical care literature, offering thought provoking, cutting-edge commentary, opinion papers, plus state-of-the art review articles. Read more →