Category: Toxicology
Keywords: ticagrelor, brillinta, xarelto, pradaxa (PubMed Search)
Posted: 3/15/2012 by Fermin Barrueto, MD
(Updated: 4/28/2024)
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Coumadin Wannabe's - have indication non-valvular atrial fibrillation
1) Dabigatran (Pradaxa)
2) Rivaroxaban (Xarelto)
Clopidogrel Wannabe's - both are antiplatelets
1) Ticagrelor (Brilinta)
2) Prasugrel (Effient)
If you were looking for the first case reports of lethal hemorrhage due to pradaxa that could not be reversed - look no further. One patient fall from standing dies from ICH and another death in a spine trauma patient on pradaxa. I am waiting for the first epidural hematoma due to pradaxa, xarelto, etc in ED. Watch out! :
1: Garber ST, Sivakumar W, Schmidt RH. Neurosurgical complications of direct thrombin inhibitors-catastrophic hemorrhage after mild traumatic brain injury in a patient receiving dabigatran. J Neurosurg. 2012 Mar 6. 2: Truumees E, Gaudu T, Dieterichs C, Geck M, Stokes J. Epidural Hematoma & Intra-operative Hemorrhage in a Spine Trauma Patient on Pradaxa® [Dabigatran]. Spine (Phila Pa 1976). 2012 Feb 16.
Category: Critical Care
Posted: 3/13/2012 by Haney Mallemat, MD
(Emailed: 3/14/2012)
(Updated: 3/14/2012)
Click here to contact Haney Mallemat, MD
Pre-oxygenation prior to rapid sequence intubation (RSI) is performed to prevent hypoxemia during endotracheal intubation.
An appropriate period of pre-oxygenation will potentially increase the amount of apnea time during intubation, however patients with certain critical illnesses (e.g., severe pneumonia) may desaturate faster than expected.
Apnea time can be increased by maintaining high-flow oxygen by nasal cannula (e.g., 15L), during application of the bag-valve mask and during the time of attempted endotracheal tube placement; this concept is known as apneic oxygenation.
Apneic oxygenation is based on the principle that when patients are apneic, alveoli absorb oxygen into the blood stream at a rate of approximately 250 mL/minute, creating a diffusion gradient from the pharynx (containing a high-density of oxygen from the nasal cannula) to a lower concentration of oxygen in the alveoli.
Although a patient’s oxygenation can be maintained longer using apneic oxygenation, its application does not remove the continuous buildup of CO2 in the alveoli during apena. Therefore, respiratory acidosis can result after a prolonged period of apneic oxygenation.
The complete article describing the physiology and practical applications can be found here....it's free! http://www.annemergmed.com/article/S0196-0644(11)01667-2/fulltext
Weingart, S and Levitan, R. Preoxygenation and prevention of desaturation during emergency airway management. Ann Emerg Med. 2012 Mar; 59(3):165-175.e1
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Category: Visual Diagnosis
Posted: 3/12/2012 by Haney Mallemat, MD
(Updated: 8/12/2014)
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14 year-old male presents with right-sided testicular pain. What's the diagnosis?
Answer: Testicular torsion
References
Shan Yin, MD, MPH, Jennifer L. Trainor, MD, Diagnosis and Management of Testicular Torsion, Torsion of the Appendix Testis, and Epididymitis, Clin Ped Emerg Med, 10:38-44, 2009
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Category: Cardiology
Keywords: age, gender, women, pain, ACS, myocardial infarction (PubMed Search)
Posted: 3/11/2012 by Amal Mattu, MD
(Updated: 4/28/2024)
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A recent study in JAMA has provided further evidence regarding some key issues in ACS/MI presentations which seem to be commonly taught but often forgotten in actual practice. Here's just a few of the key findings from this study:
1. Generally speaking, women were more likely to present without chest pain than men, and the difference between the sexes was most apparent in the < 45yo groups. Overall, 42% of women presented with painless MIs. [remember from a recent prior cardiology pearl that painless MIs have a higher mortality as well]
2. Women had a higher mortality than men within the same age groups, and the difference between the sexes was most apparent in younger ages.
3. Almost 1/5 of women < 45 yo with MI did not report chest pain. [We've always assumed it's just the older women that present with painless MIs....not true!]
A final point that should be re-stated: young women DO have MIs, they DO often present without pain, and they DO often die. Be wary.
Canto JG, et al. Association of age and sex with myocardial infarction symptom presentation and in-hospital mortality. JAMA 2012;307:813-822.
Category: Orthopedics
Keywords: foot, plantar fasciitis (PubMed Search)
Posted: 3/10/2012 by Brian Corwell, MD
(Updated: 4/28/2024)
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The plantar fascia arises from the medial tuberosity of the calcaneous and extends to the proximal phalanges of the toes.
Pkantar Fasciitis is the most common cause of heel pain in adults.
Etiology is thought to be from a degenerative tear at the fascial origin followed by a tendinosis type reaction and .
Affects women 2x> men
More common in overweight patients.
Onset is insidious and not related to trauma.
Hx: Pain and tenderness directly over the medial calcaneal tuberosity and 1-2cm distally along the plantar fascia.
Pain is worse with prolonged standing/walking. Pain is most intense however when rising from a resting position such as first thing in the morning.
PE: Pain is increased with passive dorsiflexion of the toes. Tenderness to palaption over the medial calcaneal tuberosity and 1-2cm distally along the plantar fascia.(At times, one may have to apply increased pressure to approximate weight bearing type stress)
XR: Usually not necessary with a good history and exam. Heel spurs are seen in up to 50% with the disease (and in up to 20% without it!)
DDx: Tarsal tunnel syndrome. Calcaneal stress fracture. Fat pad atrophy. traumatic rupture of planter fascia.
Category: Pediatrics
Posted: 3/9/2012 by Rose Chasm, MD
(Updated: 4/28/2024)
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American Academy of Pediatrics PREP Curriculum
Category: Toxicology
Keywords: crotalinae, snake, pressure immobilization, envenomation (PubMed Search)
Posted: 3/4/2012 by Bryan Hayes, PharmD
(Emailed: 3/8/2012)
(Updated: 3/8/2012)
Click here to contact Bryan Hayes, PharmD
Pressure immobilization involves wrapping the entire extremity with a bandage and then immobilizing the extremity with a splint. It is a technique routinely employed in the pre-hospital management of neurotoxic snakes in Australia.
A position statement was recently published by several international toxicology societies regarding the utility of pressure immobilization after North American Crotalinae snake envenomation (e.g., Copperheads, Timber rattlesnakes, Cottonmouths).
"Available evidence fails to establish the efficacy of pressure immobilization in humans, but indicates the possibility of serious adverse events arising from its use. The use of pressure immobilization for the pre-hospital treatment of North American Crotalinae envenomation is NOT recommended."
Pressure immobilization after North American Crotalinae snake envenomation. Clin Toxicol;2011;49(10):881-2.
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Category: Critical Care
Posted: 3/6/2012 by Mike Winters, MD
(Updated: 4/28/2024)
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Preventing VAP in the Intubated ED Patient
Ramirez P, et al. Measures to prevent nosocomial infections during mechanical ventilation. Curr Opin Crit Care 2012;18:86-92.
Category: Pharmacology & Therapeutics
Keywords: egg, influenza, vaccine (PubMed Search)
Posted: 3/2/2012 by Bryan Hayes, PharmD
(Emailed: 3/3/2012)
(Updated: 3/4/2012)
Click here to contact Bryan Hayes, PharmD
The seasonal influenza vaccine is produced in chicken eggs. Ovalbumin, an egg protein, is often listed as a component of the purified vaccine on most drug-package inserts. The concentration of ovalbumin indicates the potential egg-allergen content of a vaccine.
Earlier ACIP guidelines recommended against giving the influenza vaccine to people with egg allergy, including those with a history of mild symptoms. However, several studies showed that influenza vaccine containing inactivated, or killed, virus is safe to give to people with egg allergy, especially those with a history of mild allergic reactions.
Influenza vaccines are now made with much lower ovalbumin concentrations than in the past; therefore, the level of potential egg protein allergens in a single dose of vaccine is extremely low.
The following are ACIP recommendations for the 2011 to 2012 influenza season:
http://www.niaid.nih.gov/topics/vaccines/research/Pages/eggAllergy.aspx
Recommended Adult Immunization Schedule - United States, 2012. MMWR Weekly. February 3, 2-12 / 61(04);1-7.
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Category: Toxicology
Keywords: Octreotide, sulfonylurea, glucose, insulin (PubMed Search)
Posted: 3/1/2012 by Ellen Lemkin, MD, PharmD
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Dougherty PP, Klein-Schwartz W. J. Med Toxicol 2010;6:199-206.
Category: Critical Care
Keywords: VAD, ventricular assist device, hear failure, shock, hemodynamics (PubMed Search)
Posted: 2/28/2012 by Haney Mallemat, MD
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Ventricular assist devices (VAD) pump blood from the left, right or both ventricles for patients in severe ventricular failure.
VADs may be placed temporarily (as a bridge to transplant) or permanently in patients who are not transplant candidates (also known as Destination Therapy)
Certain types of VADs continuously pump blood in a non-pulsatile fashion. In these cases, a patient may be perfusing normally without a palpable pulse.
Familiarity with potential VAD complications is important as a patient with a VAD may be presenting to an ED near you. Complications include:
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Category: Visual Diagnosis
Posted: 2/27/2012 by Haney Mallemat, MD
(Updated: 8/28/2014)
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24 year-old male presents following fall from a scaffolding and complains of wrist pain. Diagnosis?
Answer: Perilunate dislocation
Perilunate dislocations usually occur following high-energy trauma (e.g., fall from a height); the mechanism is usually wrist hyperextension, ulnar deviation, and carpal supination.
Tenderness is palpated along the dorsum of the wrist; specifically distal to the lister tubercle along the scapholunate ligament; injuries may be associated with scaphoid fracture
Paresthesias may also occur along the median nerve distribution with up to 25% of cases developing carpal tunnel syndrome.
Treatment options include closed reduction and casting or open reduction and ligamentous repair with internal fixation.
The figure below illustrates the differences between lunate and perilunate dislocations.
References
Lunate and Perilunate Dislocations. Kannikeswaran, N & Sethuraman, U.
http://www.radiologyassistant.nl/en/42a29ec06b9e8 (diagram)
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Category: Cardiology
Keywords: cardiogenic shock (PubMed Search)
Posted: 2/26/2012 by Amal Mattu, MD
(Updated: 4/28/2024)
Click here to contact Amal Mattu, MD
Quick pearls on cardiogenic shock
Post-MI cardiogenic shock is associated with a mortality of 50-70%. There are only a few interventions that have been demonstrated to improve outcomes: early use of intra-aortic balloon pump, stenting, and G2B3A inhibitors.
It is generally recommended to avoid clopidogrel since so many of these patients will require CABG.
Early use of mechanical ventilation decreases work of breathing and improves oxygenation.
Remember that age alone is not a contraindication to aggressive treatment.
Category: Orthopedics
Keywords: Heel, overuse injury, apophysis (PubMed Search)
Posted: 2/25/2012 by Brian Corwell, MD
(Updated: 4/28/2024)
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Severs disease
- Perhaps the most common overuse injury
-Pain is due to inflammation of the calcaneal apophysis growth plate
- Caused by repetitive microtrauma from the pull of the Achilles tendon on the apophysis.
- Occurs in young athletes ages 7-14
Sx’s bilateral in >50%
Hx – Gradual onset of posterior heel pain, worse with activity, better with rest.
PE – Tenderness at the insertion of the Achilles tendon onto the calcaneous. Swelling is mild.
This is a self limited condition because as the adolescent ages, the physis closes
Tx – Rest (no running or jumping), ice, NSAIDs, heel lifts/arch supports. Outpatient physical therapy for stretching and strengthening exercises.
Category: Pediatrics
Posted: 2/24/2012 by Mimi Lu, MD
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Category: Toxicology
Keywords: midazolam, lorazepam (PubMed Search)
Posted: 2/23/2012 by Fermin Barrueto, MD
(Updated: 4/28/2024)
Click here to contact Fermin Barrueto, MD
You have seen the study comparing diazepam to lorazepam IV for the cessation of seizures. Lorazepam one that one. Now, for prehospital status epilepticus midazolam IM went head to head with IV lorazepam to see which would stop seizure more quickly.
This study was more about the practicality of starting an IV than it was of the pharmacokinetics or onset of action of a particular benzodiazepine. It was a large enough study to warrant publication in New Engl J Med last month and is worth noting.
Subjects whose seizures ceased before ED arrival (median):
Time to active treatment: 1.2 min IM Midazolam group; 4.8 min IV Lorazepam group
Median times active treatment to cessation of SZ: 3.3 min IM Midazolam and 1.6 min IV Lorazepam
Safety was equal in both groups. This study validates EMS initiating therapy with IM midazolam for the cessation of seizures while intravenous access is being attempted.
Intramuscular versus intravenous therapy for prehospital status epilepticus.
Silbergleit R, Durkalski V, Lowenstein D, Conwit R, Pancioli A, Palesch Y, Barsan W; NETT Investigators.
N Engl J Med. 2012 Feb 16;366(7):591-600.
Category: Critical Care
Posted: 2/21/2012 by Mike Winters, MD
(Updated: 4/28/2024)
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Ice-Cold Crystalloid for Therapeutic Hypothermia
Arulkumaran N, Ball SJ. Use of ice-cold crystalloid for inducing mild therapeutic hypothermia following out-of-hospital cardiac arrest. Resuscitation 2012;83:151-8.
Category: Medical Education
Keywords: Prezi, Power Point (PubMed Search)
Posted: 2/20/2012 by Rob Rogers, MD
(Updated: 4/28/2024)
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Getting tired of the same old Power Point presentations? Getting bored with Apple's Keynote? Looking for something new to excite learners?
Well, you might want to consider using a newer presentation tool, a tool designed to eliminate those boring bullet points...
Say hello to Prezi...
This really cool presentation tool allows you place all of your content (words, pictures, video, etc) on one canvas and then manipulate the sequence you want to show it in.
Check out the website and give it a try: www.prezi.com
Simply click on some of the sample Prezi presentations on the site. It's very cool and quite addictive.
ww.prezi.com
Category: Orthopedics
Keywords: Morton, neuroma (PubMed Search)
Posted: 2/18/2012 by Michael Bond, MD
(Updated: 4/28/2024)
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Morton's Neuroma
Thomas JL, et al. Diagnosis and treatment of forefoot disorders: Morton's intermetatarsal neuroma. Journal of Foot and Ankle Surgery. 2009;48:251.
Category: Pediatrics
Posted: 2/17/2012 by Mimi Lu, MD
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Children & Appendicitis