Paraspinous blocks for migraines

Many of you have probably heard me discuss my love of paraspinous blocks for migraine headaches, and I know several of you have learned how to do them on me when I have a migraine. This seems to be one of those slightly voodoo things that I would have sworn could never work, until I tried it and had almost immediate relief when several traditional abortive therapies failed.

For those who haven’t, this is an incredibly easy procedure that takes a minimal amount of time and can give real relief in migraine patients. There is no complicated anatomy involved, no significant technique or skill level required, and is safe enough that I have talked many novices through the procedure on a patient with supervision.

To do the block, the most important part is selecting the correct patient to increase your chances of success. Technically it won’t hurt anyone to do a block on them, but I’ve quickly learned this has a near zero chance of working in patients who state only an IV cocktail of dilaudid and phenergan works for their migraines. I’ve also found minimal effects on those who are texting while under bright lights and listening to music. I have had the most success on patients that look absolutely miserable: the ones curled up into a fetal position, actively vomiting, crying, with all the lights out and begging you to do ANYTHING to make their headaches go away. These people also tend to be quite enthusiastic about a treatment that you can administer on the spot and will work within 5-10 minutes typically. For all the things we do that sometimes have fairly minimal objective evidence of relief, it makes me very happy to walk back into a room in 20 minutes and see this previously miserable patient looking completely normal, stating their headache has resolved, and being ready to discharge… all without medications from pharmacy or an IV.

I typically use bupivicaine and do not use any subcutaneous lidocaine as the youtube video attached at the end of this post shows. I draw up 3cc, planning to use 1.5cc on each side. Your landmarks will be your C6 or C7 spinous process. I typically go C7 because it is easy to find by asking patients to flex their chin to their chest, and I like to keep things easy. C7 is the most prominent spinous process at the base of the neck. Not sure if you’re at C6, C7, or T1? Even better, for this block it doesn’t really seem to matter because it still works! You’ll be injecting approximately 2cm laterally to the edge of the spinous process, give or take half a centimeter based on body size. Again, don’t get too caught up in the details- it seems to work at 1.5cm to 3cm laterally to the process. After a swipe with an alcohol prep (bonus points- you can hand the patient another alcohol prep pad to inhale for relief of their nausea and vomiting! See last week’s journal club article for more details), you’ll insert the needle (any size, but a 25g hurts less) parallel to the ground in a straight anterior tract. I insert the needle 1.5-2cm. Aspirate to make sure you aren’t in a vessel, then inject 1cc of bupivicaine deep, and the remaining .0.5cc while withdrawing your needle. Repeat on the opposite side, stick a bandaid on, and reasses in about 20 mins. If it’s going to work, most seem to start to get significant relief in about 10 mins. If unchanged in 20ish minutes, I proceed to other therapies.

When I’m in first care, I typically will take a bottle of bupivicaine and a needle/syringe into the room when I walk in for an initial evaluation. If the patient seems to be a good candidate and is agreeable, I go ahead and do the block at that time. By the time I do my charting or see the next patient, I typically have a good idea of if the patient has improved, or rather if I need to start ordering other therapies.

Quick and easy, and I have about a 60-75% success rate on patients. Pretty good considering a standard migraine patient will likely take a couple of hours to receive IVFs, meds and reassess. You can sometimes get these people dispo’d in less than 30 minutes!

I’ve attached a quick video for you visual learners

EMRA 6 minute Lecture Winners

All,
As we have started to move towards shorter, more concise lectures I thought I would share these brief talks from EMRA. I encourage you to at least watch the first lecture (if not all three).
I want to point out how the first speaker uses essentially no bullet points, slides with minimal words, and images that cue him into what he’s talking about, cue the audience as well, but aren’t insanely distracting so that his audience is listening to him and not reading his slides. He also does a great job at the end of summarizing his talk (again with no bullet points).
I’d like you all to consider this when creating a talk, however big or small and if you have questions/need anything regarding talks fell free to ask me. I may try posting more tips/pages like this in the future if you find it helpful.

Enjoy the videos

ED Thoracotomy

Link

Resuscitative Thoracotomy

OVERVIEW

  • resuscitative thoracotomy is a thoracotomy performed prehospital, in the emergency department or elsewhere that is an integral part of the initial resuscitation of a patient
  • an alternate term is emergency thoractomy
  • survival 4-33%
  • determinants of survival include mechanism of injury, the location of injury and the presence or absence of vital signs
  • best outcomes in:

-> penetrating chest
-> those exsaunginating from chest tube
-> isolated chest trauma
-> cardiac injuries
-> abdominal trauma that benefits from aortic clamping
-> time since loss of vitals

REQUIREMENTS

  • ETT
  • shock or arrest with a suspected correctable intrathoracic lesion
  • specific diagnosis (cardiac tamponade, penetrating cardiac lesion or aortic injury)
  • evidence of ongoing thoracic haemorrhage

INDICATIONS

Accepted

  • penetrating injury + arrest + previous signs of life
  • blunt injury + arrest + previous signs of life

Relative

  • penetrating injury + no signs of life and CPR < 15min – blunt injury + signs of life in field or during transport -> arrest 15 min
  • blunt injury + no signs of life
  • multiple blunt trauma
  • severe head injury

RESUSCITATION IN TRAUMATIC ARREST

  • 1. Intubate (reverses hypoxia)
  • 2. Insert bilateral chest drains (or thoracostomies)
  • 3. Resuscitative Thoracotomy
  • 4. Limit fluid as this worsens outcome in penetrating thoracic trauma unless haemorrhage controlled
  • 5. Limit inotropes and pressors until circulation restored (will need once defect repaired)

TECHNIQUE

Goals

  • relieve cardiac tamponade
  • perform open cardiac massage
  • occlude aorta to increase blood flow to heart and brain
  • control life threatening thoracic bleeding
  • control bronchovenous air embolism

1. Full aseptic technique*** –> This was recently an issue where the Trauma attending cited both his team and ours in Rm9 for lack of full prep –> masks, surgical gloves, gowns, etc. should be worn when performing this procedure.
2. Scalpel through skin and intercostal muscles to mid axillary line.
3. Insert heavy duty scissors into thoracostomy incisions.
4. Cut through sternum.
5. Lift up (clam shell)

-> relieve tamponade (longitudinal incision through pericardium)
-> repair cardiac wounds (non-absorbable sutures, 3.0)
-> stop massive lung or hilar bleeding with finger (partial or intermittent occlusion may be performed to avoid right heart failure)
-> identify aortic injuries (repair with 3.0 non-absorbable sutures or use finger)
-> consider aortic cross clamping at level of diaphragm (limits spinal cord ischemia)

Research Lectures

Just this month, the UL ID department presented lectures on research methods from the beginning to the end of the research process.

Louisville Lectures has posted the first 3 of them and they are fantastic as expected. Louisvillelectures.org continues to receive praise from Lifeinthefastlane blog. You can find the lectures on Youtube or iTunes as well.

Here is a link directly to the site, they are video lectures so I would recommend watching on this link, though if you like to listen while driving check podcasts on iTunes.

The lectures are brief enough to be valuable for all residents and faculty, worth repeated views for anyone interested in academics.

Need to brush up on your Ophthalmology?

One our own Ophtho residents, Dr. Mark Mugavin (PGY-3), has started a YouTube channel where he is posting a series of Ophtho lectures as part of an education project. These lectures are designed for non-Ophtho residents who may run into eye complaints in their practice – AKA us.

So far he has 3 lectures posted, Ophthalmology ER, Pupils, and Practical Ophthalmology Trauma. I’ve watched them and found them helpful, would especially recommend them to the interns. Here’s the link to his channel:

https://www.youtube.com/channel/UCam8_P1v8f1t72k52vR9gbw

Spaced Repetition

21st century learning. This is a follow up and an expansion on what Martin touched on the other day. There will be a separate post that follows with an easy means of implementation.
Background information:
Or skip to a Life in the fast lane post which provides similar info:
A Wired magazine article on spaced repetition software:
A review of spaced recall with numerous citations:
A department of education report illustrating the implementation of spaced repetition:
Free open source, cross platform, spaced repetition software, Anki:
A guide to making flashcards for effective spaced repetition:
A couple general articles on spaced repetition:

Donovan, J. J., & Radosevich, D. J. (1999). A meta-analytic review of the distribution of practice effect: Now you see it, now you don’t. Journal of Applied Psychology, 84(5), 795-805.

Stahl SM, Davis RL, Kim DH, Lowe NG, Carlson RE, Fountain K, Grady MM. Play it Again: The Master Psychopharmacology Program as an Example of Interval Learning in Bite-Sized Portions. CNS Spectr. 2010 Aug;15(8):491-504. PMID:20703196.

Several articles by a Harvard Urologist about the implementation of spaced repetition in medical education:
1: Kerfoot BP. Adaptive spaced education improves learning efficiency: a
randomized controlled trial. J Urol. 2010 Feb;183(2):678-81. doi:
10.1016/j.juro.2009.10.005. PubMed PMID: 20022032.


2: Kerfoot BP. Interactive spaced education versus web based modules for teaching
urology to medical students: a randomized controlled trial. J Urol. 2008
Jun;179(6):2351-6; discussion 2356-7. doi: 10.1016/j.juro.2008.01.126. Epub 2008 
Apr 18. PubMed PMID: 18423715.


3: Kerfoot BP, DeWolf WC, Masser BA, Church PA, Federman DD. Spaced education
improves the retention of clinical knowledge by medical students: a randomised
controlled trial. Med Educ. 2007 Jan;41(1):23-31. PubMed PMID: 17209889.


4: Kerfoot BP, Brotschi E. Online spaced education to teach urology to medical
students: a multi-institutional randomized trial. Am J Surg. 2009
Jan;197(1):89-95. doi: 10.1016/j.amjsurg.2007.10.026. Epub 2008 Jul 9. PubMed
PMID: 18614145.


5: Kerfoot BP, Fu Y, Baker H, Connelly D, Ritchey ML, Genega EM. Online spaced
education generates transfer and improves long-term retention of diagnostic
skills: a randomized controlled trial. J Am Coll Surg. 2010
Sep;211(3):331-337.e1. doi: 10.1016/j.jamcollsurg.2010.04.023. Epub 2010 Jul 13. 
PubMed PMID: 20800189.

Science of Learning

To all the new interns:

You are starting a new phase of your education. One that is largely self directed. We have our core texts, Rosen’s, Tintinalli’s, and Harwood-Nuss, which you will pick one of and begin to work through. We also have the supplemental, but extremely mandatory books like Robert’s and Hedge’s Procedures in Emergency Medicine. This post is a suggestion to add one more book up front and potentially make your time reading more valuable.

Make It Stick

 

The purpose of this post is to save you from wasting hundreds of hours reading and rereading to find that little has stuck at the end of it. The pre-eminent point of this book is that recall trumps repetition. Actively trying to remember is a hundred fold more productive than rereading.

Here’s a quick summary of other points:

  • Learning is deeper and more durable when it’s effortful. Learning that’s easy is like writing in sand, here today and gone tomorrow.
  • We are poor judges of when we are learning well and when we’re not. When the going is harder and slower and it doesn’t feel productive, we are drawn to strategies that feel more fruitful, unaware that the gains from these strategies are often temporary.
  • Rereading text and massed practice of a skill or new knowledge are by far the preferred study strategies of learners of all stripes, but they’re also among the least productive. By massed practice we mean the single-minded, rapid-fire repetition of something you’re trying to burn into memory, the “practice-practice-practice” of conventional wisdom. Cramming for exams is an example . Rereading and massed practice give rise to feelings of fluency that are taken to be signs of mastery, but for true mastery or durability these strategies are largely a waste of time.
  • Retrieval practice—recalling facts or concepts or events from memory— is a more effective learning strategy than review by rereading. Periodic practice arrests forgetting, strengthens retrieval routes, and is essential for hanging onto the knowledge you want to gain.
  • When you space out practice at a task and get a little rusty between sessions, or you interleave the practice of two or more subjects, retrieval is harder and feels less productive, but the effort produces longer lasting learning and enables more versatile application of it in later settings.
  • Trying to solve a problem before being taught the solution leads to better learning, even when errors are made in the attempt.
  • People do have multiple forms of intelligence to bring to bear on learning, and you learn better when you “go wide,” drawing on all of your aptitudes and resourcefulness, than when you limit instruction or experience to the style you find most amenable.
  • When you’re adept at extracting the underlying principles or “rules” that differentiate types of problems, you’re more successful at picking the right solutions in unfamiliar situations. This skill is better acquired through interleaved and varied practice than massed practice.
  • In virtually all areas of learning, you build better mastery when you use testing as a tool to identify and bring up your areas of weakness.
  • Elaboration is the process of giving new material meaning by expressing it in your own words and connecting it with what you already know. The more you can explain about the way your new learning relates to your prior knowledge, the stronger your grasp of the new learning will be, and the more connections you create that will help you remember it later.
  • Rereading has three strikes against it. It is time consuming. It doesn’t result in durable memory. And it often involves a kind of unwitting self-deception, as growing familiarity with the text comes to feel like mastery of the content.
  • It makes sense to reread a text once if there’s been a meaningful lapse of time since the first reading, but doing multiple readings in close succession is a time-consuming study strategy that yields negligible benefits at the expense of much more effective strategies that take less time. Yet surveys of college students confirm what professors have long known: highlighting, underlining, and sustained poring over notes and texts are the most-used study strategies, by far.
  • Rising familiarity with a text and fluency in reading it can create an illusion of mastery. As any professor will attest, students work hard to capture the precise wording of phrases they hear in class lectures, laboring under the misapprehension that the essence of the subject lies in the syntax in which it’s described. Mastering the lecture or the text is not the same as mastering the ideas behind them . However, repeated reading provides the illusion of mastery of the underlying ideas. Don’t let yourself be fooled. The fact that you can repeat the phrases in a text or your lecture notes is no indication that you understand the significance of the precepts they describe, their application, or how they relate to what you already know about the subject.

Summary above from: https://rkbookreviews.wordpress.com/2014/06/06/make-it-stick-summary/

I’ve made sure everyone has access to this book. If anyone has any questions, feel free to email me.

Rosen flashcards

8400 flashcards based on the 7th Edition of Rosens Emergency Medicine Concepts and Clinical Practice.

The flash cards are attached. Here is the site I got them from:

A post on how to use them with anki:
A post on ‘Life in the Fast Lane’ on the use of anki in EM:
An alternative method for someone who doesn’t want to get into flashcards or the software but would like a good study guide, the text files can easily be turned into tables for quick review. I attached an example.
If anyone has any questions, let me know.