UMEM Educational Pearls

Category: Toxicology

Title: Performance Enhancing Drugs: creatine

Keywords: creatine, supplement, weight lifting (PubMed Search)

Posted: 1/3/2013 by Ellen Lemkin, MD, PharmD (Updated: 4/24/2024)
Click here to contact Ellen Lemkin, MD, PharmD

Creatine

  • is the most popular nutritional supplement, accounting for $400 million in sales annually
  • a nonessential amino acid
  • has been shown to improve performance in short, high intensity exercises, including weight lifting

Adverse effects: weight gain, edema, GI cramping, fatigue and diarrhea

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Category: International EM

Title: Leptospirosis

Keywords: Leptospirosis, Baltimore, jaundice, thrombocytopenia, international, tropical (PubMed Search)

Posted: 1/2/2013 by Andrea Tenner, MD
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General Information:

-Leptospirosis is a tropical infectious disease that is also endemic in the US. (Estimated 16% seroprevalence in inner city Baltimore!)

-The spirochete is spread through animal urine and can survive in water or soil for weeks.

-Risk factors: rural exposure to animal urine (farming, adventure sports) or urban exposure to rat urine.

-Infection is acquired through breaks in the skin or mucus membranes

-Outbreaks are often seen following rain or floods. 

Clinical Presentation:

-Non-specific febrile illness (usually not diagnosed in these cases)

-If untreated, 5-10% progress to jaundice, renal failure, thrombocytopenia, hemorrhage, and respiratory failure.

Diagnosis:

- Primarily based on clinical presentation and history

- Paired serum sent to CDC (the acute serum sample should be drawn in the ED)

Treatment:

- Doxycycline, Ceftriaxone and Penicillin are all effective

Bottom Line:

Consider and treat for Leptospirosis in patients with possible exposure animal urine (especially after a flood) who present in extremis with renal failure, jaundice, and thrombocytopenia.

University of Maryland Section of Global Emergency Health

Author: Andi Tenner, MD, MPH

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DRESS (Drug Reaction with Eosinophilia and Systemic Symptoms) or DIHS (Drug-Induced Hypersensitivity Syndrome) is a potentially life-threatening adverse drug-reaction.

Incidence is 1/1,000 to 1/10,00 drug exposures. It occurs 2-6 weeks after the drug is first introduced, distinguishing it from other adverse drug-reactions which typically occur sooner.

The syndrome classically includes:

  • Severe skin eruptions (typically morbilliform or erythrodermic eruptions)
  • Hematologic abnormalities (eosinophilia or atypical lymphocytosis)
  • Organ involvement; e.g., hepatic (most common), pneumonitis, renal failure, etc.
  • Fevers
  • Arthralgia
  • Lymphadenopathy

The most commonly implicated drugs are anticonvulsants (e.g., carbamazepine, phenobarbital, and phenytoin), sulfonamides, and allopurinol. 

Recovery is typically complete after discontinuing the offending drug; systemic steroids may promote resolution of the illness.

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Question

31 year-old male with recently diagnosed hypertension presents with rapid lip swelling. He started taking an unknown medication for his hypertension last week. Further history reveals that he has had prior, although milder, episodes previously. Name two medications that may help treat him.

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  • Type 1: Ischemic myocardial necrosis secondary to plaque rupture (ACS)
  • Type 2: Ischemic myocardial necrosis not secondary to ACS, but rather supply/demand mismatch, vasospasm, emboli, anemia, hypoperfusion, and/or arrhythmia
  • Type 3: Sudden cardiac death
  • Type 4a: PCI related
  • Type 4b: Stent thrombosis
  • Type 5: CABG related 

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Category: Orthopedics

Title: Boxer's (Metacarpal Neck) Fractures

Keywords: metacarpal, neck, fracture (PubMed Search)

Posted: 12/29/2012 by Michael Bond, MD
Click here to contact Michael Bond, MD

Metacarpal Neck Fractures (i.e.: Boxer’s Fracture if 5th Metacarpal)

Depending on the MCP joint involved a certain amount of angulation is permissible before it adversely affects normal function.

  • 2nd and 3rd Metacarpal fractures < 10۫ angulation ideally these should be perfectly aligned.
  • 4th Metacarpal fracture <20۫ angulation allowed
  • 5th Metacarpal fracture <30۫ angulation.
    • Studies have shown that even 30۫ angulation will decrease normal function by 20%.  
    • Normal excursion of the 5th MCP is 15۫ to 25۫.
  • No amount of rotation deformity should be allowed.

Wishing everybody a Happy and Healthy New Year.



An 18-months old presents with classic symptoms of bronchiolitis.  A trial of Albuterol does not show any objective improvement. What are your other options?
- Nebulized epinephrine: 0.9mg/kg for racemic epi or 0.03 mL/kg of the 2.25% solution (diluted in 3mL) - improves oxygen saturation and respiratory rate, but does not affect admission rates
- Hypertonic saline (3%): decreases hospital length of stay and improves clinical scores, possibly by decreasing airway edema and mucus plugging
- Nasal CPAP: improves ventilation in children with bronchiolitis and hypercapnia
- Heliox: decreases respiratory distress, by reducing gaseous flow resistance and improving alveolar ventilation

Interventions that have shown no benefit and are not recommended:
- Anticholinergics
- oral and/or inhaled corticosteroids


Reference:
Joesph, M. Evidence-Based Assessment and Management of Acute Bronchiolitis in the Emergency Department. Pediatric Emergency Medicine Practice 2011; 8(3)


Category: Toxicology

Title: Topical ketamine for chronic pain syndromes

Keywords: ketamine, pain (PubMed Search)

Posted: 12/27/2012 by Fermin Barrueto, MD (Updated: 4/24/2024)
Click here to contact Fermin Barrueto, MD

Despite a paucity of data, pain management clinics are administering topical gel mixtures that have included ketamine, tricyclics, calcium channel blockers and baclofen. Internet blogs have already identified this gel mixture as a way to "get high".  This is one of those google searches you have to do on your own.

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Category: International EM

Title: Malaria

Posted: 12/25/2012 by Walid Hammad, MD, MBChB (Updated: 4/24/2024)
Click here to contact Walid Hammad, MD, MBChB

 

 

  • Case Presentation from our ED
    • 20 y/o presents 3 weeks after emigrating from Senegal with headache and malaise. CT/LP and work up  was otherwise negative. Thin smear shows 1 plasmodium falciparum parasite in 7000 RBC.
    • Appropriate therapy is initiated with malarone (atovoquone and progranuil). 24 hours later the patient represents with worsening headache and fever.
    • Repeat smear shows 10% parasitemia and massive numbers of parasites
  • Clinical Question: Can parasitemia rise after initiation of treatment?
    • Answer: Yes
    • Increase in blood parasite count in falciparum malaria after initiation of treatment (artemisinin derivatives or quinine) is not uncommon.
    • Increased blood parasite count does not indicated treatment failure if it the parasitemia is LESS THAN 2.5 x the baseline count.
  • Clinical Question:  Did this patient have treatment failure with malarone?
  • Answer: Yes
  • The patient’s parasitemia rose to 10% after initiation of therapy.
  • There are increasing case reports of treatment failure in West Africa with Malarone.

Bottom Line: A mild increase in blood parasite count after initiation of treatment is not uncommon. Marked increases should indicated treatment failure and the treatment drug should be changed to another class.

 

 

University of Maryland Section for Global Emergency Health

Author: Emilie J.B. Calvello, MD, MPH

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Attachments

1212252349_Malaria_Pearl_Visual_EJBC_copy.pdf (1,967 Kb)



VV-ECMO for Refractory Hypoxemia

  • In the absence of significant cardiac disease, patients with refractory hypoxic respiratory failure should be considered for venovenous extracorporeal membrane oxygenation (VV-ECMO).
  • Though indications vary slightly among organizations, the Extracorporeal Life Support Organization states that ECMO is indicated when the PaO2/FiO2 is < 80 mm Hg on FiO2 > 90% or safe plateau pressures (< 30 cm H2O) cannot be maintained.
  • A few pearls when initiating VV-ECMO:
    • Fluids are often needed in the first few hours after initiation of ECMO
    • Reduce tidal volumes to maintain plateau pressures < 25 cm H2O
    • Decrease FiO2 to maintain oxygen saturations > 88%
    • Use a hemoglobin threshold of 7-8 g/dL for blood transfusion

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Question

52 year-old male with diabetes complains of severe left foot pain for one month and now inability to ambulate. Vital signs are normal and X-rays are shown below. What's the diagnosis and why should you get a biopsy early?  

 

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  • ST-elevation may represent STEMI or other alternative diagnoses (e.g., aortic dissection)
  • Computed tomographic (CT) scanning may help in identifying these alternative diagnoses
  • ACTIVATE-SF Registry consists of patients w/a Dx of STEMI admitted to the ED 
  • 410 patients w/a suspected diagnosis of STEMI, 45 (11%) underwent CT scanning before primary PCI; 2 (4%) of these CT scans changed clinical management by identifying a stroke
  • Those who underwent CT scanning had far longer door-to-balloon times (median 166 vs 75 minutes, p <0.001) and higher in-hospital mortality (20% vs 7.8%, p=0.006)
  • CT scanning before PCI rarely changed management and was associated w/significant delays in door-to-balloon times

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Category: Orthopedics

Title: NSAIDs & Exercise

Keywords: Exercise, NSAIDs, bowel injury (PubMed Search)

Posted: 12/22/2012 by Brian Corwell, MD
Click here to contact Brian Corwell, MD

NSAIDs are commonly used by professional and recreational athletes to both reduce existing and/or prevent anticipated exercise induced musculoskeletal pain

NSAIDs have potential hazardous effects on the gastrointestinal (GI) mucosa  during strenuous physical exercise

Potential effects include mucosal ulceration, bleeding, perforation. and short-term loss of gut barrier function in otherwise healthy individuals

Intense exercise by itself has previously been shown to induce small intestine injury

Human intestinal fatty acid binding protein (1-FABP) is a protein found in mature small bowel enterocytes which diffuses into the circulation upon injury

Ibuprofen and endurance exercise (cycling) independently result in increased 1-FABP levels

When occurring together, ibuprofen ingestion with subsequent exercise causes significantly increased small bowel injury and intestinal permeability

Small bowel injury was found to  be reversible in 2 hours

Taking empiric NSAIDs before endurance exercise may be an unhealthy practice and should be discouraged in the absence of a clear medical indication

 

 

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Category: Pediatrics

Title: Nasal foreign body removal

Posted: 12/15/2012 by Mimi Lu, MD (Emailed: 12/21/2012) (Updated: 12/21/2012)
Click here to contact Mimi Lu, MD

Parents bring in their child who placed a bead, seed, or other object up her nose.  What do you do?  Who should you call?

Research suggests that a decades-old home remedy (of sorts) known as the “mother’s kiss” may do the trick for children 1-8 years of age. It’s also much less invasive or frightening than some of the tools and techniques used in emergency departments with a success rate approaching 60%

What Is the “Mother’s Kiss”?

First described in 1965, here’s how the mother’s kiss technique works:

  • The parent or caretaker places their mouth over their child’s mouth while holding the unaffected nostril closed with one finger.
  • The parent or caretaker blows into the child’s mouth.
  • The forceful breath may force the object out (warning: may want to wear protective covering as other things have been known to fly out as well!)

 

Reference:
Cook S, Burton M, Glasziou P. Efficacy and safety of the "mother's kiss" technique: a systematic review of case reports and case series. CMAJ.2012 Nov 20;184(17):E904-12. doi: 10.1503/cmaj.111864. Epub 2012 Oct 15.

 



Category: Toxicology

Title: Holiday Toxicology

Keywords: poinsettia (PubMed Search)

Posted: 12/20/2012 by Fermin Barrueto, MD (Updated: 4/24/2024)
Click here to contact Fermin Barrueto, MD

Myth: The ornamental red plant - poinsettia - gained a reputation as a poisonous plant from a case report. In 1919, a 2-year-old child reportedly died from an ingestion and later an 8-month-old developed mucosal burns.  These anectdotal case reports perpetuated the myth that poinsettia plants are poisonous. In the modern literature there is one single case of anaphylaxis(1) due to poinsettia ingestion/exposure, an allergic dermatitis(2) and one case of dermatitis(4). 

Krenzelok et al.(3) showed there were 22,793 cases of poinsettia exposure and there were no fatalities reported to poison centers. 96.1% were kept at home without sequelae.

 

 

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Category: International EM

Title: Human African trypanosomiasis (HAT), also known as sleeping sickness

Keywords: trypanosomiasis, Human African Trypanosomiasis, sleeping sickness, international (PubMed Search)

Posted: 12/19/2012 by Walid Hammad, MD, MBChB
Click here to contact Walid Hammad, MD, MBChB

 

·      A parasitic disease transmitted by the bite of the 'Glossina' insect  (tsetse fly.)

·      The disease is most prevalent in rural areas of Africa. Untreated, it is usually fatal. Infection with the genus Trypanosoma brucei gambiense may lead to chronic asymptomatic illness.

·      Travelers to endemic areas in Africa are risk becoming infected.

·      Symptoms resemble a viral illness; headaches, fever, weakness, pain in the joints, and stiffness. The parasite is able to crosses the blood-brain barrier and causes neurological symptoms, mainly psychiatric disorders, seizures, coma and ultimately death.

·      Diagnosis is by serological tests (Card Agglutination Trypanosomiasis Test or CATT). Confirmation of infection requires the performance of parasitological tests to demonstrate the presence of trypanosomes in the patient.

·      Treatment: four drugs are registered for the treatment of HAT: pentamidine, suramin, melarsoprol and eflornithine.

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Management of patients with severe traumatic brain injury (TBI) typically involves the use of invasive intra-parenchymal pressure monitors. Although use of these monitors is recommended by TBI management guidelines, good quality evidence of benefit is lacking.

A recently published study evaluated the outcomes of TBI patients using a management protocol incorporating either an intracranial pressure (ICP) monitor compared to use of the clinical exam PLUS serial neuroimaging; a total of 324 patients were prospectively randomized into either group.

The primary study outcome was a composite of survival, impaired consciousness, and functional status at both three and six months.

The results of the study did not show a significant difference in the:

  • Primary outcome  
  • Median length of ICU stay
  • Distribution of serious adverse events

Bottom line: This study suggests that clinical exam PLUS serial neuroimaging may perform as well as invasive intra-parenchymal monitors for guiding therapy in TBI patients.

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Question

50 year-old man with presents with acute-onset sharp left-sided chest pain and dyspnea. What's the diagnosis and the name of the abnormality on chest x-ray?

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Category: Cardiology

Title: Pulmonary Arterial Hypertension (PAH)

Keywords: Pulmonary Arterial Hypertension (PAH) (PubMed Search)

Posted: 12/17/2012 by Semhar Tewelde, MD (Updated: 4/24/2024)
Click here to contact Semhar Tewelde, MD

 

  • PAH can be classified as primary (PPH) or secondary pulmonary hypertension (SPH)
  • Epoprostenol a prostacyclin analog was the first primary drug for patients w/PAH
  • Recent clinical trials describe combination therapy as superior in efficacy to traditional monotherapy
  • Varied etiologies of PAH hampers the performance of RCTs for each combination therapy
  • PAH is associated w/diminished endothelium factor & nitric oxide, increased phosphodiesterase enzyme leading to the development of the ET-1 receptor antagonist (ERA) bosentan and the PDE- V inhibitor sildenafil
  • RCTs are currently investigating the efficacy of three news agents in tx of PAH: imatinib, riociguat, and selexipag 

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Category: ENT

Title: Epistaxis Control

Keywords: epistaxis (PubMed Search)

Posted: 12/15/2012 by Michael Bond, MD
Click here to contact Michael Bond, MD

Epistaxis can be a difficult thing to control in the ED, but there are several techniques you can learn that will make your life easier.

The majority of epistaxis cases are from kiesselbach's plexus therefore you can control it with:

Direct Pressure: Can be held with two fingers pinching the nares, or you can tape 4 tongue blades together and make your own "clothes pin" that can then be used to pinch the nares.

Vasoconstrictor and Anesthesia: A 1:1 mixture of topical lidocaine 4% and oxymetazoline can often be mixed together in the same oxymetazoline spray container enabling you to just spray it into the nares. This will often slow or stop the bleeding and provides anesthesia in case you need to cauterize the bleeding site.  Some IV/IM narcotic pain medication will also help increase patient cooperation.

Visualize the bleeding site: Use a HEAD LAMP with an appropriate sized nasal speculum. You may look like Marcus Welby, MD but nothing works as well to see into the nose.

Cauterization It is best to cauterize circumferential around the bleeding site prior to directly cauterizing the actual site. Be careful with electrical cautery so has not to perforate the septum.

Nasal Packing: Instead of using surgilube to lubricate the packing; use Muprion, Bactroban or Bacitracin ointment to lubricate the packing. This will reduce the chance of Toxic Shock Syndrome.