Last month the AHA, ERC, and ILCOR released the 2010 Resuscitation Guidelines. They build on the 2005 and previous guidelines and continue the trend towards more, higher quality, uninterrupted CPR. The complete summary and recommendations are published in Circulation and are available for free.
Here is my summary for you!
Emergency physicians are procedural experts in central venous access. The subclavian vein is the best site for such access, because it has been shown to have the lowest rate of iatrogenic infections and deep venous clots
Bedside ultrasonography has really revolutionized how we obtain vascular access over the past 10 years. Identifying the subclavian vein using ultrasonography, however, is still technically challenging. The vein is located just posterior to the clavicle, which often gets in the way of the linear transducer.
It is difficult to determine if a patient with a left bundle branch block (LBBB) has an acute myocardial infarction (AMI) because ST segments are “appropriately discordant” with the terminal portion of the QRS. That means if the QRS complex is negative (or downgoing), the ST segment normally will be positive (or elevated). Similarly if the QRS complex is positive (or upgoing), the ST segment will be negative (or depressed).
In 1996, Sgarbossa et al looked through the GUSTO-1 trial patients with LBBB and AMI. They derived 3 criteria which may help diagnose the “hidden” AMI. The criteria are:
1. ST elevation ≥ 1 mm concordant with QRS complex (most predictive of AMI of the 3 criteria)
2. ST depression ≥ 1 mm in lead V1, V2, or V3
3. ST elevation ≥ 5 mm where discordant with QRS complex
Use these criteria with caution though. None of these criteria are perfect. They are to help you risk-stratify. For instance, criteria #3 (ST elevation ≥ 5 mm) can exist in asymptomatic patients with LBBB because of concurrent left ventricular hypertrophy and high voltages.
There are many ways to relocate a shoulder dislocation. Most of these ways require procedural sedation. What if the risks of procedural sedation outweigh the risks? What alternative maneuver can you try, which only requires parenteral pain medications +/- an intra-articular lidocaine?
To treat for pertussis or not?
In the setting of the current pertussis epidemic in California, each kid with a cough sparks constant debate about whether to treat with azithromycin or not. Finally, thanks to my friends Dr. Andi Marmor and Dr. Shon Agarwal Jain (UCSF Pediatrics faculty), there’s a great algorithm to help you answer the question. I have found this algorithm extremely helpful.
You basically start by risk-stratifying by age and pertussis immunization status. For instance, if the patient is 6 months of age AND unimmunized), then follow the algorithm listed as “High Risk for Pertussis”.
Go to ALiEM (PV) Cards for more resources.
I just wanted to revisit the Trick of using bedside ultrasonography to diagnose retinal detachments. Be sure to use plenty of ultrasound gel and use the linear tranducer.
This is the second Paucis Verbis card on cervical spine fractures. Part 1 covered C1 and C2 fractures. This card covers the lower cervical spine fractures. These two tables are part of my chapter on “Spine and Spinal Cord Injury” in the textbook Emergency Medicine by Dr. Jim Adams (Northwestern EM Chair).
Go to ALiEM (PV) Cards for more resources.