High-Frequency Oscillatory Ventilation for ARDS?
Every heard of the Khan Academy website? If you have, you will instantly recogize what a powerful force this website has become in education. If you haven't, what are you waiting for? Head to http://www.khanacademy.org/ and check it out! This site gets millions of hit PER DAY.
The Khan Academy was developed by, guess who, a guy named Kahn, Salman Kahn. This website is amazing. My kids use it for some of their school work. Trust me, check it out. If you want to know just how good this guy is...check out the size of the check Bill Gates wrote him.
What does this have to do with medical education? The videos put together by Khan utilize a teaching modality called a "whiteboard." This type of teaching technology is changing they way educators deliver material. Programs like Doceri (www.doceri.com) utilize this concept. You can build presentations and teaching materials with audio included.
My pearl for you today is really more of an assignment...go to the two websites and check them out. First, visit the Khan Academy site and then the Doceri site. THIS kind of thing is the future of education...
How likely is coronary artery disease to occur in young patients?
An autopsy series in US communities evaluated young patients (avg age 36 years old) who died of "non-natural" causes revealed coronary atherosclerosis in > 80% of the autopsy sample, with 8% having significant obstructive disease.
The bottom line is simple....be wary of discounting the risk of ACS purely based on a patient's age. The HPI is the most important factor in predicting ACS.
Rashes that include palms/ soles
- Hand-Foot-Mouth Disease
- Kawasaki
- Erythema multiforme/ Stevens Johnson's Syndrome/ Toxic Epidermal Necrolysis
- Rocky Mountain Spotted Fever
- Scabies
- Syphillis
Rashes that have +Nikolsky's sign
- Scalded Skin Syndrome
- TEN
- Pemphigus Vulgaris
Rashes that desquamate
- Scalded Skin Syndrome
- Toxic Shock Syndrome
- Scarlet Fever
- Kawasaki
- TEN
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.
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
14 year-old male presents with right-sided testicular pain. What's the diagnosis?
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.
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.
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."
Preventing VAP in the Intubated ED Patient
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:
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:
24 year-old male presents following fall from a scaffolding and complains of wrist pain. Diagnosis?
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.
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.
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.
