Quiz 176, January 20, 2023

Welcome to the 176th FOAMed Quiz.

Not a lot of FOAMed content this week, so we’re going to do it a little bit different.

Name the eponyms of the following fractures and te nationality of the namegiver for extra points 🙂

 

Question 1

An osseous Bankart lesion is commonly seen in patients with an anterior shoulder dislocation.

Arthur Sidney Blundell Bankart (1879- 1951) was a British Orthopaedic surgeon.

Question 2

A Segond fracture is considered pathognomonic for ACL disruption

Paul Ferdinand Segond (1851-1912) was a French surgeon.

Question 3

A Bennett fracture is an intra-articular two-part fracture of the base of the first metacarpal with carpometacarpal joint involvement.

Edward Hallaran Bennett (1837-1907) was an Irish Surgeon.

Question 4

A Smith fracture is an extra-articular fracture of the distal radius with volar angulation.

Robert William Smith (1807 – 1873) was an Irish surgeon and pathologist.

Question 5

A Tillaux fracture is a fracture of the anterolateral tibial epiphysis. It commonly seen in adolescents.

I could be a triplane fracture as well, but there is no surgeon called triplane as far as I know. 

Paul Jules Tillaux (1834-1904) was a French surgeon.

Question 6

A Chance fracture is a transverse fracture through a vertebral body and neural arch.

George Quentin Chance was an Irish radiologist

Question 7

A Jefferson fracture is a burst fracture of the atlas (C1).

Geoffrey Jefferson (1886 – 1961) was a British neurosurgeon.

Question 8

A Jones fracture is a fracture of the proximal diaphysis of the 5th metatarsal, distal to the tuberosity.

Sir Robert Jones (1857-1933) was a Welsh general and orthopaedic surgeon.

Question 9

A Lisfranc injury is a tarsometatarsal fracture dislocation characterized by traumatic disruption between the articulation of the medial cuneiform and base of the second metatarsal.

Jacques Lisfranc de Saint-Martin (1787 – 1847) was a French surgeon.

Question 10

The Malgaigne fracture is an unstable fracture of the pelvis. The Malgaigne fracture usually results from a vertical shear force causing two ipsilateral pelvic ring fractures.

Joseph François Malgaigne (1806 – 1865) was a French surgeon.

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Nicole van Groningen, Jeroen van Brakel, Noortje Geerts and Renée Deckers

Reviewed and edited by Rick Thissen

Quiz 165, October 28, 2022

Welcome to the 165th FOAMed Quiz.

 

Question 1

Source image: n.neurology.org

Your patient presents with a triad of ophthalmoplegia, ataxia, and areflexia.

Which variant of Guillain-Barré syndrome fits best?

A: Acute inflammatory demyelinating polyneuropathy (AIDP)

B: Acute motor axonal neuropathy (AMAN)

C: Acute motor sensory axonal neuropathy (AMSAN)

D: Miller-Fisher syndrome

The correct answer is D.

Geeky Medics covered Guillain-Barré syndrome last week.

Miller-Fisher syndrome is typically associated with a triad of ophthalmoplegia, ataxia, and areflexia

Guillain-Barré Syndrome

Question 2

Source image: pixabay.com

Winter is coming.

This retrospective, observational paper published earlier this year is about prostaglandin (iloprost) in frostbite. 90 patients with grade 2-4 frostbite injuries were included. 26 were treated with 5-day intravenous prostaglandin, compared to 64 patients who received usual care.

The primary outcome was the rate of affected digits amputated.

What did the authors find?

A: Significantly lower digital amputation rates were observed for patients with severe (grade 3 and 4) frostbite injuries treated with iloprost versus usual care

B: Significantly lower digital amputation rates were observed for patients with severe (grade 3 and 4) frostbite injuries treated with usual care versus iloprost

C: There was no difference between the groups

The correct answer is A

CanadiEM covered the paper last week.

Significantly lower digital amputation rates were observed in patients with more severe frostbite injuries treated with iloprost versus usual care: Grade 3 (18% vs 44%, p < 0.001), Grade 4 (46% vs 95%, p < 0.001).

CJEM Visual Abstract: IV Prostaglandin to Reduce Digital Amputations in Frostbite

Question 3

Which of the following structures is most likely damaged in a patient with this X-ray?

Source image: orthobullets.com

A: Anterior Cruciate Ligament (ACL)

B: Posterior Cruciate Ligament (PCL)

C: Medial collateral ligament (MCL)

D: Lateral collateral ligament (LCL)

The correct answer is A

EM cases covered frequently missed diagnoses last week.

The depression on the lateral femoral condyle is called a deep sulcus terminalis sign or simply lateral femoral notch sign. It suggests an ACL tear.

Ep 175 Emergency Orthopedics Differential: SCARED OF Mnemonic – When X-rays Lie

Question 4

Source image: litfl.com

Your patient presents with a small complex tachycardia of 160 bpm. He is hemodynamically stable. 6 mg Adenosine converted the rhythm to sinus for about 10 seconds, but it relapsed into an AVNRT.

Which of the following treatment options is not a reasonable next step?

A: Adenosine 12 mg

B: A Beta Blocker

C: A Calcium Antagonist

The correct answer is A

A case just like this one has been covered on dr. Smith’s ECG blog last week.

Adenosine converted the rhythm, but this only lasted for some seconds. A higher dose will most likely do just the same. You need something that converts the rhythm and acts longer. Both an intravenous calcium antagonist or intravenous beta blocker will likely do the job.

Question 5

Source image: jetem.org

We are all taught that you should not give nitroglycerin in acute right ventricular infarction (RVMI) due to risk of compromised right ventricular ejection fraction.

This recently published meta-analysis included 5 papers (1113 patients). The outcome consists of all forms of adverse events reported in literature.

What did the authors find?

A: No, there is no statistically significant difference in the rate of adverse events when nitrates are administered to RVMI compared with other cardiac regions. However, the adverse events were major.

B: No, there is no statistically significant difference in the rate of adverse events when nitrates are administered to RVMI compared with other cardiac regions. Furthermore, the adverse events were only minor.

C: Yes, there is a statistically significant difference in the rate of adverse events when nitrates are administered to RVMI compared with other cardiac regions and the adverse events were major.

D: Yes, there is a statistically significant difference in the rate of adverse events when nitrates are administered to RVMI compared with other cardiac regions but the adverse events were only minor.

The correct answer is B.

EMCrit covered the meta-analysis last week.

This meta-analysis did find a non-statistically significant difference in adverse event rates
from nitrates based on the cardiac region of the infarction. These adverse events were noted to be minor and transient.

EMCrit Wee – Is there Evidence of Harm for Nitroglycerin in Right Ventricular MI? #Dogmalysis

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Nicole van Groningen, Jeroen van Brakel, Noortje Geerts and Renée Deckers

Reviewed and edited by Rick Thissen

Quiz 162, July 15, 2022

Welcome to the 162th FOAMed Quiz.

 

Question 1

source image: pixabay.com

The recently published SALSA trial was about the risk of overcorrection of symptomatic hyponatremia using hypertonic saline (3%) bolus versus slow continuous infusion. 178 patients with moderately severe to severe symptomatic hyponatremia were randomised to receive either a rapid intermittent bolus (RIB, 2 cc per kilogram, repeated if necessary) versus slow continuous infusion (SCI, 0,5 to 1 cc per kilogram per hour, adjusted if necessary).

Overcorrection was defined as an increase in serum sodium of 12 mmol/L in 24 hours or 18 mmol/L in 48 hours.

What did the authors find?

A: Overcorrection occurred significantly more in the RIB group compared to the SCI group

B: Overcorrection occurred significantly more in the SCI group compared to the RIB group

C: There was no significant difference in occurrence of overcorrection between the RIB group and SCI group

The correct answer is C.

emDOCs covered the SALSA trial last week.

In this randomized clinical trial, overcorrection occurred in 17.2% of patients in the RIB group and 24.2% in the SCI group (absolute risk difference, -6.9% [95% CI, -18.8% to 4.9%]; P = .26). Both RIB and SCI therapy strategies for treating symptomatic hyponatremia seem effective and safe.

The groups did not differ in terms of efficacy in increasing serum sodium concentrations nor improving symptoms. However, RIB, when compared with SCI, showed better efficacy in achieving target correction rate within 1 hour (intention-to-treat analysis: 32.2% vs 17.6% P = .02). Because of this RIB seems to be preferable in treating hyponatremia in the emergency department

52 in 52 – #2: The SALSA Trial

Question 2

Source image: emergencymedicinecases.com

We are most likely overdiagnosing pulmonary embolism and harming our patient with unnecessary anticoagulation. Whether to treat isolated subsegmental pulmonary embolism or not remains controversial.

In this recently published observational trial, 292 patients with isolated subsegmental pulmonary embolism who did not receive anticoagulation were included. Patients with active cancer or history of venous thromboembolism (VTE) were excluded.

The primary outcome was recurrent venous thromboembolism during the 90 day follow-up period.

What did the authors find?

A: The risk of recurrent VTE was 0%

B: The risk of recurrent VTE was 1%

C: The risk of recurrent VTE was 3%

The correct answer is C.

The paper was covered on first10EM last week.

In this cohort, the risk of recurrent VTE was 3%. There were a total of 8 patients with recurrent VTE. 4 were proximal PE’s and 4 were proximal DVT’s. This number seems a bit high to deny patients from anticoagulation.

What to do about subsegmental pulmonary embolism?

Question 3

Source image: http://hqmeded-ecg.blogspot.com/

The ECG above shows de Winter’s T- waves. There are hyperacute T waves with depressed ST takeoff or ST depression in leads V2-V4.

What are de Winter’s T-waves indicative of?

A: Occlusion on the RCA

B: Occlusion of the LAD

C: Occlusion of the Cx

D: Pericarditis

The correct answer is B.

This ECG was covered on dr. Smiths ECG blog last week.

The de Winter pattern is seen in about 2% of acute LAD occlusions and is often under recognized.

Question 4

Source image: EMDocs.com

The PEricapsular Nerve Group block (PENG-block) is used as an alternative (and likely more effective block) to nerve blocks like the femoral nerve block and the Fascia Iliaca Compartment Block in patients with proximal femur pathology.

In performing the PENG block, in what location should the local anesthetic be injected?

A: Deep to the psoas tendon

B: Just superficial to the anterior inferior iliac spine

C: Just superficial to the iliopubic eminence

D: Superficial to the iliopsoas muscle

The correct answer is A.

EM Pills covered the PENG block last week.

The local anesthetic should be injected in the iliopsoas recess deep to the psoas tendon.

PENG Block

Question 5

Source image: myblockbuddy.com

Which of the following statements about B-lines in ultrasonography is true?

A: B-lines are only seen in pulmonary ultrasound

B: B-lines in pulmonary ultrasound are typically seen in case of pneumothorax

C: B-lines are caused by adjacent fluid filled and air filled structures

D: B-lines typically fade with increasing depth

The correct answer is C.

Ultrasound artifacts are covered by Jacob Avila on Core ultrasound last week.

B-lines are often seen in pulmonary ultrasound, but can be present around the body as long as reverberation artifacts can be caused by adjacent fluid filled and air filled structures. These artifacts are not seen in pneumothorax and they typically don’t fade with increasing depth.

Ultrasound Artifacts, Part 2

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 160, July 1, 2022

Welcome to the 160th FOAMed Quiz.

 

Question 1

The electrocardiogram shown above belongs to a 7 year old boy who suddenly collapsed during exercise. It is an example of a Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT).

Which of the following statements about CPVT is NOT true?

A: Children between the ages of 7 – 9 years are mostly affected by CPVT, but it also occurs in children under 2 years old. It is uncommon in children older than12 years

B: CPVT is induced by physical or emotional stress

C: If CPVT is not timely diagnosed and treated, it has a mortality rate of up to 35%

D: CPTV occurs in an anatomically and structurally normal heart

E: Patients with CPVT typically have a normal baseline ECG

The correct answer is A

Critical Care Now covered CPVT last week.

Children between the ages of 7 and 9 years are most commonly affected, but it also occurs in children up to 12 years old. It is rare in children less than 2 years old.

Obtaining a family history in these patients is extremely important because thirty percent of patients have family history positive for exercise-induced syncope, seizure or sudden death.

Many patients are initially misdiagnosed as having vasovagal syncope or epilepsy. The most common presentation is syncope during exercise.

Patients with CPVT typically have an anatomically and structurally normal heart and a normal baseline ECG.

Catecholaminergic Polymorphic Ventricular Tachycardia: Recognize And Treat It Early

Question 2

Source image: pixabay.com

Your patient presents with a swan neck deformity of his right index finger.

Rupture of which of the following structures typically causes a swan neck deformity?

A: Terminal extensor tendon

B: Central band of the extensor tendon

C: Flexor digitorum profundus (FDP)

D: Flexor digitorum superficialis (FDS)

The correct answer is D

AliEM covered finger injuries last week.

A swan neck deformity is caused by rupture of the FDS.

Rupture of the FPD causes inability to flex in the distal interphalangeal joint.

Central band rupture causes Boutonniere’s deformity.

Rupture of the terminal extensor tendon causes a mallet finger.

SplintER Series: Stop! Hammer Time

Question 3

Which of the following mushrooms would you choose to eat (assuming you are not suicidal)?

A

B

C

The correct answer is B.

Morel mushrooms and their imposters were covered on Taming the SRU last week.

A morel mushroom (B) exhibits a spongy, porous labyrinth of deeply-ridged craters and pits. It is completely hollow on the inside.

Its imposter, Gyromitra (A), appears rufous, mahogany, or crimson – colored and are not hollow on the inside. It contains gyromitrin, which is hydrolyzed into monomethylhydrazine (MMH), which reacts with pyridoxal phosphate. A lack of pyridoxal phosphate (active form of vitamin B6) results in cessation of production of GABA and as you can image, this causes seizures and overall badness.

Number C is called Autumn Skullcap (cute name) and contains amatoxins, causing gastrointestinal and hepatotoxic problems, coma, and death.

Question 4

Source image: ecg-interpretation.blogspot.com

An eldery male patient presents to the ED with new-onset chest pain since a couple of hours. The patient had a long history of smoking, but no prior history of heart disease. His ECG is shown above.

Which of the following coronary arteries was most likely to be occluded?

A. Right coronary artery (RCA)

B. Left Main (LCA)

C. Left anterior descending artery (LAD)

D. Left circumflex artery (LCX)

Correct answer is C

This ECG and case was covered by Ken Grauer on ECG interpretations last week.

The ECG shows a huge ongoing STEMI. There are ST elevations in 9 out of 12 leads, most dominant in leads V2-V6. This suggests either acute proximal LAD occlusion or Left main occlusion (LCA). Unfortunately, in this case the patient died before cardiac catheterization could be performed. The culprit lesion is most likely to be found in the proximal LAD, since the patient survived another 1-2 hours after presentation which is not very common in a complete Left Main obstruction.

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 156, May 27, 2022

Welcome to the 156th FOAMed Quiz.

 

Question 1

Source image: pixabay.com

Your 3 year old patient comes in with a cough. There is no respiratory distress. Her mom is pretty sure she aspirated a peanut.

Which of the following statements about aspiration of a peanut is true?

A: In case of mild symptoms, there is no need to retrieve the peanut. It will dissolve by itself

B: In case of mild symptoms, the peanut should be retrieved within 48 hours

C: Even in case of mild symptoms, the peanut should be retrieved as soon as possible

The correct answer is C.

Don’t forget the Bubbles covered foreign object aspiration last week.

Peanuts should be retrieved as soon as possible. ‘’ lipophilic objects (like peanuts) can cause massive cytokine release and inflammation due to their fat content.’’

The hidden dangers of inhaled plastic toys

Question 2

Source image: http://brownemblog.com/

Diagnosing pyogenic flexor tenosynovitis can be challenging when the clinical picture is not obvious. The diagnostic value of laboratory testing is uncertain and plain X-ray and CT are not helpful. MRI can aid in diagnosing tenosynovitis but is not always available. In comes ultrasound…

In this 2018 paper 57 patients with suspected pyogenic flexor tenosynovitis (but not obvious, those were excluded) underwent ultrasound in addition to clinical examination (fluid within the tendon sheath). The gold standard was inter-operative findings or (whenever the patient did not get surgical intervention) the clinical course when treated with antibiotics only.

What did the authors find?

A: Ultrasound had both a high sensitivity and a high specificity

B: Ultrasound had a high sensitivity, but a low specificity

C: Ultrasound had a low sensitivity, but a high specificity

D: Ultrasound had both a low sensitivity and a low specificity

The correct answer is B.

AlieEM covered pyogenic flexor tenosynovitis last week.

In the 2018 paper, of 57 patients, 29 patients had a negative ultrasound and were treated with antibiotics only with good outcome. There was only 1 patient that turned out to have flexor tenosynovitis after all. Of the 27 patients that had a positive ultrasound, 10 patients did not have flexor tenosynovitis intra-operatively.

The sensitivity was 94% and the specificity only 65%.

SplintER Series: Point Tender

Question 3

Your 55 year old patient comes in with hypovolemic shock due to esophageal varices bleeding. You intubate and ask for a minnesota tube.

Which of the following is a Minnesota tube?

A
C
B

The correct answer is C (tough one)

This very helpful EMRap video was shared on UMEM last week.

A is a Linton tube and B is a Blakemore tube. The Missesota tube is the one with the many ports. It has a port for both balloons and for suction of gastric content as well as for esophageal content. For an explanation of the differences, watch the video.

Question 4

Source image: pixabay.com

Which of the following clinical signs fit the picture of heparin induced thrombocytopenia?

A: A fall in platelet of 20 percent

B: The platelet fall starts 1 days after start of heparin

C: New venous thrombosis

D: The patient 1 one day post surgery

The correct answer is C.

Critical Care Now covered heparin induced thrombocytopenia (HIT) last week.

A platelet fall of > 50 percent, platelet fall within 5-10 days of starting heparin, new thrombosis and no other cause of thrombocytopenia eg. no surgery) are typical for HIT.

4Ts versus 3Ls: heparin induced thrombocytopenia probability scoring

Question 5

Source image: pixabay.com

There are two generations of anticoagulant rodenticides: first generation include warfarin. Second generation rodenticides are also called superwarfarins and very long acting and potent.

Which of the following statements is true about management of superwarfarin intoxication in the emergency department?

A: Asymptomatic patients with a normal INR 12 hours post ingestion can be safely discharged and don’t need follow-up

B: Charcoal may be useful if administered in the first 1-2 hours after ingestion

C: Vitamin K should definitely be administered at presentation in the emergency department

D: If INR is normal at 48-72h after ingestion, toxicity still can’t be ruled out

The correct answer is B.

Anticoagulant rodenticide intoxication was covered on EMDocs last week.

Charcoal may be useful if administered to prevent absorption in the first 1-2 hours after ingestion.

Administration of vitamin K prior to detecting an elevated INR is debatable, as vitamin K1 may delay INR elevation and underestimate severity of exposure.

If INR is normal at 48-72 hrs, clinical toxicity can be safely ruled out with very rare exceptions.

emDOCs.net – Emergency Medicine EducationToxCard: Superwarfarins – emDOCs.net – Emergency Medicine Education

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 154, May 13

Welcome to the 154th FOAMed Quiz.

 

Question 1

Source image: first10EM.com

What is the maximum dose of lidocaine without adrenaline for peripheral nerve blocks?

A: 2 mg/kg

B: 3 mg/kg

C: 4.5 mg/kg

D: 6.5 mg/kg

The correct answer is C.

BrownEM Local Anesthetic Systemic Toxicity (LAST) last week.

The maximum dose of lidocaine is 4.5 mg/kg.

LAST the most feared complication of ‘’amide’’ local anesthetics like lidocaine. To minimize the risk of LAST, the smallest effective dose of local anesthetic should be used.

Question 2

Source image: dontforgetthebubbles.com/toddler-fracture/

On this X-ray, a spiral fracture of the tibia can be found.

How is his fracture often called?

A: Toddler’s fracture

B: Neonate fracture

C: Infant fracture

D: Preschool fracture

The correct answer is A.

Pediatric EM Morsels covered tibial shaft fractures last week.

Tibial shaft fractures are the 3rd most common long bone injuries in children.

A toddler fracture is a minimally or undisplaced spiral fracture of the tibia, typically encountered in toddlers. It is the result of low impact trauma and these fractures can be really hard to detect on an X-ray.

Tibial Shaft Fractures in Children

Question 3

Source image: pixabay.com

Your patient presents with progressive weakness and difficulty breathing. He has myasthenia gravis and you suspect a myasthenic crisis with so far an unknown cause.

Which of the following statements is true about the treatment of myasthenic crisis?

A: In rapid sequence intubation, succinylcholine should be used instead of nondepolarizing agents

B: Patients with difficulty breathing should be in supine position as long as possible

C: Plasma exchange is the first-line agent for severe exacerbations

The correct answer is is C.

SinaiEM covered myasthenic crisis last week.

The effect of succinylcholine is unreliable due to reduced acetylcholine receptor density in patients with myasthenia gravis.

Patients with myasthenic crisis have weak diaphragm and will have a higher forced vital capacity when sitting upright, compared to lying down.

Plasma exchange is the first-line agent for severe exacerbation, as it causes improvement in a few days. Intravenous Immunoglobulin (IVIG) needs a couple of weeks to be effective.

Myasthenic Crisis

Question 4

Source image: pixabay.com

Your 2 year old patient presents with a painful elbow after her father lifted her by her arms. You suspect a radial head subluxation (nursemaid’s elbow).

Which of the following reduction techniques is considered to be the most effective?

A: Hyperpronation

B: Supination and flexion

C: Traction

The correct answer is A.

EM Pills blog (in Italian) covered the nursemaid’s elbow last week.

Hyperpronation is considered to have greater effectiveness compared to the supination-flexion maneuver. Furthermore, this maneuver would seem to be less painful for the child.

IL GOMITO DELLA BAMBINAIA

Question 5

 

Source image: semanticscholar.org

Point of care ultrasound (POCUS) can be helpful whenever the diagnosis of a radial head subluxation is not clear. Which of the following POCUS signs are found in a nursemaid’s elbow?

A: Twinkle sign

B: Hook sign

C: Donut Sign

The correct answer is B.

The twinkle sign (or twinkling artifact) consists of rapid alternation of color immediately behind an echogenic object, causing false appearance of movement.

The donut sign is seen in intussusception.

The hook sign is caused by ‘’pulling’’ the annular ligament between the radial head and the capitellum. It is seen in longitudinal view

IL GOMITO DELLA BAMBINAIA

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 152, April 29th, 2022

Welcome to the 152th FOAMed Quiz.

 

Source image: theultrasoundsite.co.uk

Question 1

Your 75 year old patient presents with arthritis of his knee. Which of the following sonographic signs is typically found in gout?

A: Banana sign

B: Whirlpool sign

C: Falling snow sign

D: Double contour sign

The correct answer is D.

The role of ultrasonography in the diagnosis of gout was discussed on BrownEM last week.

The double contour sign is a hyperechoic irregular or linear enhancement parallel to the subchondral bone. However, this can also be present in calcium pyrophosphate deposition disease (pseudogout).

The banana sign is seen in Chiari II malformation in the fetus.

The whirlpool sign is seen in midgut volvulus (or ovarian or testicular torsion).

The falling snow sign is seen in spermatocele.

Source image: www.healthline.com

Question 2

Which of the following drugs generally does not cause a positive standard opioid urine drug screen test?

A: Oxycodone

B: Heroin

C: Morphine

D: Codeine

The correct answer is A.

Opioid drug screening was covered on AliEM last week.

Heroin and codeine are metabolized to morphine and generally cause a positive drug screen test. (semi) Synthetic opioids like oxycodone might not cross react and frequently do not cause a positive test. However, oxycodone can be tested in another essay.

Interpretation and Limitations of Opiate Urine Drug Tests

Source image: avssuk.co.uk

Question 3

In which of the following injuries can the saline load test be useful?

A: Pneumothorax

B: Liver injury

C: Shoulder dislocation

D: Traumatic arthrotomy

The correct answer is D.

Traumatic arthrotomy was covered on NUEM last week.

The saline load test is done by performing an arthrocentesis of the affected joint away from laceration. Once confirmed in the correct space, sterile saline is injected into the joint and the laceration site is observed for extravasation.

Source image: emottawablog.com

Question 4

Which of the following treatment options is NOT considered first line in pericarditis?

A: NSAID

B: Corticosteroids

C: Colchicine

The correct answer is B.

Pericarditis and myocarditis were covered on EMOttawa last week.

NSAIDs (ibuprofen or acetylsalicylic acid) and colchicine are first line treatment options for acute pericarditis. Corticosteroids are not.

Pericarditis and Myocarditis in the ED

Source image: anatomytool.org

Question 5

Aortic dissection is a life threatening condition that is often hard to diagnose. POCUS has been reported to have low sensitivity, but it can make this diagnosis more likely whenever abnormalities are found.

Choose between the following options to form a correct statement about the aortic root on POCUS.

The aortic root is best measured in the (A) ….. at the level of (B)….. at the end of (C)….. and should not be larger than (D)…. in diameter.

A: Parasternal long axis view / Parasternal short axis view

B: Aortic annulus / sinus of valsalva

C: Systole / Diastole

D: 3.5cm / 4.5cm

The correct answer is:
The aortic root is best measured in the parasternal long axis view at the level of the sinus of valsalva at the end of the diastole and should not be larger than 4.5 cm in diameter.

This week Taming the SRU discussed aortic dissection.

POCUS can be useful for rapid assessment of aortic dissection complications: aortic root dilatation, aortic regurgitation, pericardial effusion and hemothorax. Remember that the negative predictive value is (very) low.

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 149, March 18, 2022

Welcome to the 149th FOAMed Quiz.

 

Question 1

Source image: thesgem.com

Chest tubes for a small traumatic pneumothorax has been subject of discussion the last couple of years.

In this recently published paper, a single center implemented a guideline in which traumatic pneumothoraces of ≤35 mm in stable patients were treated conservatively. The outcomes were observation failure (patient needing a chest tube after all), length of hospital stay, complications and mortality.

A pre-guideline implementation (n=99) group was compared to a post-guideline implementation group (n=167).

After implementation of the guideline, there was a decrease in number of patients receiving chest tubes from 28.3% to 18% (p=0.04).

What else did the authors find?

A: Observation failure was higher after conservative guideline implementation

B: Observation failure was higher before conservative guideline implementation

C: No significant differences were found in observation failure

The correct answer is C.

The paper was covered on JournalFeed last week.

There was a significant increase in observation rates, while tube thoracostomies decreased. No statistically significant changes in observation failure rates, hospital or ICU length-of stay, complications, or mortality were found.

Question 2

Source image: rcemlearning.co.uk

Your 64 year old presents to the Emergency Department with acute dyspnea and chest pain. After questioning and examining the patient you suspect him to have acute heart failure (AHF).

Which statement about diagnosis of AHF is true?

A: Obese patients typically demonstrate higher BNP and NT-proBNP

B: Chest x-ray is very sensitive for the diagnosis of AHF

C: Point of care ultrasound is a reliable tool for assessing pulmonary edema in AHF

The correct answer is C

This week EMDocs covered the misconceptions and pearls about Acute Heart Failure

Natriuretic peptides include BNP and NT-proBNP which are cardiac neurohormones produced in cardiac muscle when there is myocyte stretch.

Due to less myocardial stress, obese patients may demonstrate lower BNP and NT-proBNP.

Chest X-ray has a pretty low sensitivity for AHF.

POCUS has a high sensitivity for pulmonary edema.

emDOCs Podcast – Episode 49: Acute Heart Failure Evaluation Misconceptions

Question 3

Source image: litfl.com

An ECG is essential to differentiate between acute myocardial infarction (MI) and pericarditis.

Which of the following features is more indicative for pericarditis than for MI?

Two answers are correct.

A: ST elevation II > ST elevation III

B: ST elevation III > ST elevation II

C: ST elevation > 5mm

D: Convex shaped ST elevations

E: Spodick’s sign

The correct answers are A and E.

This week Emergency Medicine Cases covered pericarditis.

In pericarditis there is widespread/diffuse PR depression and/or ST elevation. The ST elevations are more commonly concave shaped than convex.

ST elevation is rarely > 5mm in pericarditis.

Furthermore, ST elevation II > ST elevation III favors pericarditis and ST elevation III > ST elevation II is highly indicative for inferior STEMI.

Spodick’s sign is seen in approximately 80% of patients with acute pericarditis and in only 5% of STEMIs. It is characterized by down-sloping from the T wave to the QRS segments with the terminal PR segment depressed.

Ep 166 Pericarditis and Cardiac Tamponade

Question 4

Source image: dailymail.co.uk

High dose hydroxocobalamin administration (in case of cyanide intoxication) leads to a typical discoloration of urine.

What color is it?

A: Blue

B: Red

C: Green

D: Brown

The correct answer is B, red.

LITFL covered cyanide intoxication last week.

Hydroxocobalamin leads to a harmless and transient reddish colour to the skin and urine. The urine can have this colour for about a month after administration.

Raspberry urine?

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 147, March 4, 2022

Welcome to the 147th FOAMed Quiz.

 

Question 1

Source image: www.genome.gov/

Pain control in patients with sickle cell disease (SCD) and vaso-occlusive crisis (VOC) is often challenging. High doses of opioids are often needed to achieve acceptable analgesia.

In this paper 278 adults with acute sickle VOC were randomized to receive a single dose of either ketamine or morphine, infused over 30 min.

The primary outcome was the mean difference in the numerical pain rating scale (NPRS) score over 2 hours.

What did the authors find?

A: Early use of ketamine in adults with VOC resulted in a meaningful reduction in pain scores over a 2-h period and reduced the cumulative morphine dose in the ED compared to morphine alone

B: Early use of ketamine in adults with VOC did not result in a meaningful reduction in pain scores over a 2-h period and did not reduce the cumulative morphine dose in the ED compared to morphine alone

C: Early use of ketamine in adults with VOC resulted in a meaningful reduction in pain scores over a 2-h period and did not reduce the cumulative morphine dose in the ED compared to morphine alone

The correct answer is A.

The paper was covered on BrownEM last week.

Early use of ketamine in adults with VOC resulted in a meaningful reduction in pain scores over a 2-h period and reduced the cumulative morphine dose in the ED with no significant drug-related side effects in the ketamine-treated group.

 

Question 2

Source image: www.nextgenerationvillage.com/

Your patient comes in with altered mental status, bradypnoeic and with miosis after ingesting quite a large amount of pills he uses ´for his stomach’.

Which of the following drugs is most likely the cause.

A: Metoclopramide

B: Ondansetron

C: Loperamide

The correct answer is C.

PEMCincinnati covered loperamide intoxication last week.

Loperamide is an over-the-counter μ-opioid receptor agonist which can be abused to get an opioid high. The required dosages are quite significant.

Metoclopramide can cause lethargy, bradypnoea and extrapyramidal symptoms, but no miosis.

Ondansetron can cause serotonin syndrome.

Loperamide abuse and misuse

Question 3

Source image: litfl.com/

Atrial fibrillation (AF) is the most commonly encountered arrhythmia in the Emergency Department. Rate control is one of the treatment goals in permanent AF.

This recently published meta analysis is about IV Diltiazem versus IV Metoprolol for rate control in patients with AF and rapid ventricular rate (RVR).

Seventeen studies involving 1214 patients in nine RCTs were included.

What did the authors find?

A: Intravenous diltiazem has higher efficacy but an increase in adverse events compared to intravenous metoprolol

B: Intravenous diltiazem has higher efficacy and with no increase in adverse events compared to intravenous metoprolol

C: Intravenous diltiazem has lower efficacy and an increase in adverse events compared to intravenous metoprolol

The correct answer is B.

The paper was covered in JournalFeed last week.

Intravenous diltiazem was found to have higher efficacy, shorter onset time and no increase in adverse events compared to intravenous metoprolol.

Question 4

Source image: www.mdedge.com/

The effectiveness of andexanet alfa (AA) for reversal of oral factor Xa inhibitors (FXi) therapy remains uncertain.

In this retrospective cohort study, 44 adult patients with life-threatening traumatic or spontaneous intracranial bleeds in the setting of apixaban or rivaroxaban use were analysed. 28 of these patients received AA and 16 patients received 4F-PCC.

The primary outcome was ´stable´ head CT (no large increase in hematoma size) at 6 and 24 hours post-administration of AA or 4F-PCC.

What did the authors find?

A: Patients receiving AA had significantly more stable neuroimaging assessment at 24 hours compared to patients receiving 4F-PCC

B: Patients receiving 4F-PCC had significantly more stable neuroimaging assessment at 24 hours compared to patients receiving AA

C: There was no significant difference in the proportion of patients with stable neuroimaging at 24 hours assessment between the two groups

The correct answer is C.

This retrospective observational paper was covered on Rebel EM last week.

There was no statistically significant difference rate of stable neuroimaging at 24 hours between the two groups.

Keep in mind this paper has several methodological issues. The sample size is very small and the primary outcome is not patient centered. Furthermore there is major concern for selection bias and unbalanced baseline characteristics.

Andexanet Alfa Vs. Four-Factor PCC: Is Andexanet Alfa Worth The Hype?

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Maartje van Iwaarden and Nicole van Groningen

Reviewed and edited by Rick Thissen

Quiz 140, January 7th, 2022

Welcome to the 140th FOAMed Quiz.

 

Question 1

The MR CLEAN-NO IV trial was published last november. It is another trial about the benefit of treatment with alteplase in patients who qualify for endovascular therapy.

539 adult ischemic stroke patients with an NIHSS of ≥2 that were eligible for endovascular treatment (EVT) and IV alteplase, within 4.5 hours after symptom onset, were included. They were randomised to usual care (alteplase plus EVT) or EVT alone. The primary outcome was functional outcome (modified Rankin scale at 90 days). The outcome was analyzed for superiority and then for noninferiority.

What did the authors find (two correct answers)?

A: EVT alone was superior to alteplase followed by EVT

B: EVT alone was not superior to alteplase followed by EVT

C: EVT alone was non-inferior to alteplase followed by EVT

D: EVT alone was not non-inferior to alteplase followed by EVT

The correct answers are B and D.

RebelEM covered the MR CLEAN-NO IV trial last week.

Patients in the EVT-alone group had a median mRS of 3. Patients in the Alteplase + EVT group had a median mRS of 2.

EVT alone was both not superior and non-inferior compared to EVT plus alteplase.

MR CLEAN-NO IV: Endovascular Treatment for Stroke Compared to Alteplase Followed by Endovascular Treatment: No Difference, But Also Not Not Worse

Question 2

Source image: healio.com

You see a 6-year-old boy in your emergency department who complains of a funny feeling in his chest. This started during his soccer training an hour ago. On 12-lead ECG, you see a narrow-complex tachycardia of 205bpm. His BP is 110/70 mmHg. He appears comfortable and is neither tachypneic nor diaphoretic. He has no history of structural heart disease.

Of the following options, which is the most appropriate?

A: You carefully examine the 12-lead ECG for signs that indicate the presence of a bypass tract as this is a contra-indication for giving adenosine

B: You give adenosine (with pads for electrical cardioversion standby) 0.1 mg/kg whether you have reasons to think about a bypass tract or not

C: You treat him with electrical cardioversion (0.5-2J/kg) because adenosine is contra-indicated in children under 8

D: You search for an underlying etiology as sepsis or a toxidrome, as a narrow-complex tachycardia in children is nearly always a secondary phenomenon and responds poorly to cardioversion (high recurrence rate) if the primary condition remains untreated

The correct answer is B.

EMDocs’ pediatric small talk was about narrow complex tachyarrhythmia this week.

Nearly all children under 1 and most children under 8 have a bypass tract which can cause AVRT. Presence of a bypass tract is not a contra-indication to use adenosine if resuscitative equipment is readily available (low risk of conversion into ventricular fibrillation). Electrical cardioversion with 0.5-2J/kg is indicated when the patient is unstable. When cardioversion (chemical or electrical) fails due to immediate recurrence of the SVT, search for an underlying etiology.

Pediatric Small Talk – The Rhythm Is Gonna Get Ya’: Age Based Approach to Pediatric Narrow Complex Tachydysrhythmia

Question 3

Source image: tamingthesru.com

What type of fracture is shown in this image?

A: Le Fort 1

B: Le Fort 2

C: Le Fort 3

D: Le Fort 4

The correct answer is B.

Taming the SRU covered facial trauma last week.

‘’Le Fort I fractures are transverse fractures that separate the maxilla from the pterygoid plate and nasal septum.

Le Fort II fractures are pyramidal fractures that extend into the orbital floor and inferior orbital rim separating the central maxilla and hard palate from the rest of the face.

Le Fort III fractures, also known as craniofacial disjunction, cause mobility of the entire face.’’

Question 4

Source image: www.mdpi.com

You suspect a high intracranial pressure in your patient. He is too unstable for CT-scanning right now and you perform ocular ultrasound.

To assess for elevated intracranial pressure, the optic nerve sheath diameter (ONSD) should be measured at a fixed distance from the rim of the globe.

How many millimeters behind the rim should the ONSD be measured?

A: 0 mm (at the rim)

B: 1 mm

C: 3 mm

D: 7 mm

 

The correct answer is C.

BrownEM covered ocular ultrasound this week.

The ONSD can be measured 3 mm behind the rim of the globe and its diameter should measure approximately 5 mm or less in healthy adults (although this cutoff is arbitrary).

 

Question 5

Source image: radiopaedia.org

You’ve ordered an AP chest x-ray for a 5 year old patient who you suspect of pneumonia. His parents are worried about radiation.

Everyone is exposed to a normal amount of background radiation during their life. For example the activity in Australia is 1.5mSv per year.

How many days of background radiation is equivalent to one AP chest x-ray for this patient living in Australia?

A: 3

B: 15

C: 89

D: 294

The correct answer is A.

This week Don’t Forget The Bubbles discussed ionizing imaging in children.

It is difficult to provide parents with clear information, because of the wide variety of contributing factors to the risk of ionizing radiation imaging. For chest x-rays the lifetime risk of radiation-induced cancers is considered to range from negligible to low.

However for CT scans in pediatric patients studies have shown a statistically significantly increased risk for malignant and non-malignant brain tumors.

Best to keep in mind: Is this test really needed and will it change the patient’s diagnosis or management?

How safe are CT scans in children?

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This quiz was written by Sophie Nieuwendijk, Denise van Vossen, Gijs de Zeeuw, Nicole van Groningen and Joep Hermans

Reviewed and edited by Rick Thissen