UMEM Educational Pearls

Category: Infectious Disease

Title: Meningitis Prophalaxis

Keywords: meningitis, fluoroquinolone (PubMed Search)

Posted: 2/25/2008 by Michael Bond, MD (Emailed: 3/1/2008) (Updated: 12/9/2019)
Click here to contact Michael Bond, MD

It has become standard that close contacts of individuals being treated for bacterial meningitis be treated prophalacticly with antibiotics to prevent additional cases.  Fluoroquinolones, in particular ciprofloxicin, have been the drug of choice as a single dose provided adequate protection.

Now the CDC is reporting the first cluster of fluoroquinolone-resistant meningococcal disease in North America have been documented along the Minnesota-North Dakota border.  As of now, the CDC still recommends ciprofloxacin for all parts of the country except for a 34-county area in the Minnesota-North Dakota area.  In that area the CDC is recommending rifampin, ceftriaxone or azithromycin be used.

This needs to be followed closely as the resistant organism is extremely likely to spread across the country and it will probably this time next year when nobody can use ciprofloxacin anymore.


Category: Pediatrics

Title: Umbilical Cord Problems

Keywords: Delayed Umbilical Cord Separation, Omphalitis, Leukocyte Adhesion Deficiency (PubMed Search)

Posted: 2/29/2008 by Sean Fox, MD (Updated: 12/9/2019)
Click here to contact Sean Fox, MD

Umbilical Cord Problems

  • Delayed Umbilical Separation
    • Normal Time for cord separation = 1 – 8 weeks postnatal age.
    • Common Reasons for Delayed Separation:
      • h/o Neonatal Sepsis and antibiotic administration
      • h/o Prematurity
      • h/o C-Section delivery
      • h/o Low Birth Weight
    • Rare, yet most concerning reason for Delayed Separation:
      • Immuno-Deficiency – Leukocyte Adhesion Deficiency type 1 (LAD-1)
        • Life-threatening
  • Omphalitis
    • Infection of the remnant of the umbilical cord
    • More common in developing countries
    • Staph. aureus is most common organism cultured
    • Complication from:
      • Spontaneous Evisceration
      • Necrotizing Fasciiis of scrotum and/or penis
      • Peritonitis
      • Intra-abdominal abscesses
    • Early detection is paramount

Category: Critical Care Literature Update

Title: Critical Care Literature Updates

Keywords: hydrocortisone, corticosteroids, insulin, sepsis (PubMed Search)

Posted: 2/28/2008 by Mike Winters, MD (Updated: 12/9/2019)
Click here to contact Mike Winters, MD

Since all of us are taking care of critically ill patients for longer periods of time, I think it is important to be familar with current critical care literature.  Often, we are the first "intensivist" a patient sees when they arrive to the hospital.  To keep us up to date, I am going to be sending out critical care literature updates every couple of weeks similar to Amal's cardiology updates.   Please email me with any questions, comments, or feedback.

Mike

Recent Articles from the 2008 Critical Care Literature

 

Hydrocortisone therapy for patients with septic shock.

Sprung CL, Annane D, Keh D, Moreno R, Singer M, et al. NEJM 2008;358:111-24.

            Corticosteroid therapy for patients with septic shock seems to change favor every couple of years.  In the first publication of the Surviving Sepsis Campaign Guidelines, steroids were given a favorable recommendation based largely upon the results of one multicenter, randomized, controlled trial. (Annane, et al. JAMA 2002;288:862-71) In this study, Annane reported a reduction in the likelihood of death in patients who did not respond to the corticotropin stimulation test and were given steroids (hydrocortisone and fludrocortisone).

            The current study is from the CORTICUS Study Group and is a multicenter, randomized, double-blind, placebo-controlled study conducted in 52 ICUs from March 2002 to November 2005.  Enrolled patients had to have clinical evidence of infection, a systemic response to infection, organ dysfunction attributable to sepsis, and the onset of shock within 72 hours (SBP < 90 mmHg despite fluids or vasopressors).  Patients were randomized to receive either hydrocortisone or placebo for 5 days.  Doses were then tapered over the next 6 days for a total duration of therapy of 11 days.  A lack of response to corticotropin was defined as an increase in cortisol of no more then 9 mcg/dL.  The primary end point of the study was the rate of death from any cause at 28 days in “non-responders”.  Some important secondary end-points included the rate of death at 28 days in “responders”, time to reversal of shock, duration of ICU and hospital stay, and rates of death at 1 year.

            Four-hundred ninety nine patients were enrolled in the study.  Of these, 233 were identified as “non-responders”.  In this group, 125 were randomized to receive hydrocortisone and 108 received placebo.  The demographic and clinical characteristics of patients in each group were similar.  Over 90% of patients in each group were vented and all were receiving vasopressors, the most common being norepinephrine.  With respect to the primary outcome, there was no significant difference in the rate of death at 28 days between the study groups.  For the secondary end points, there was also no significant difference in the rate of death in “responders”, duration of ICU or hospital length of stay, or death at 1 year.  The only difference that was found in those receiving hydrocortisone was a reduction in the time to reversal of shock.  Importantly, this did not translate into improved mortality.  Lastly, the authors reported an increase in new episodes of sepsis and septic shock in those receiving hydrocortisone but the absolute numbers are small.

            Things to Consider:  Investigators had planned to enroll 800 patients but stopped at 499 due to slow recruitment, termination of funding, and expiration of the study drug.  In addition, the mortality rate in the placebo group was lower than what would be expected.  As a result, the study is inadequately powered.  In contrast to the Annane study, enrollment of patients could be up to 72 hours after the onset of shock, raising the question of timing of steroids administration.  Furthermore, the majority of patients in this study were older, Caucasian males who required emergency surgery – not typical of the septic shock population at UMMC.  Importantly, patients who were receiving long-term corticosteroids within the past 6 months, or short-term steroids within the past 4 weeks, were excluded – the patients we would typically give stress dose steroids to during refractory shock. 

            Take Home Point: Although CORTICUS is underpowered, it is one of the largest trials to date on corticosteroids in patients with septic shock.  The results indicate that corticosteroid therapy in this patient population of “non-responders” had no effect on mortality.  Based upon this study, the latest version of the Surviving Sepsis Campaign Guidelines has downgraded their recommendation on corticosteroids.  It appears that the pendulum regarding steroids may now be swinging back in the negative direction.

 

Intensive insulin therapy and pentastarch resuscitation in severe sepsis.

Brunkhorst FM, Engel C, Bloos R, Meier-Hellmann A, Ragaller M, et al. NEJM 2008;358:125-139.

            The concept of “tight glucose control” in critically ill patients primarily began with the Van de Berghe study in 2001.  In this study, investigators found a reduction in mortality in critically ill patients whose glucose was maintained between 80 – 110 mg/dL. (Van de Berghe G, et al. NEJM 2001;345:1359-67.)  The benefit was primarily seen in cardiac surgery patients who had multiple organ failure from sepsis.  Furthermore, these patients were given a high glucose challenge immediately after surgery – not a common practice.  More recently, the same investigators evaluated MICU patients who had not undergone surgery nor received a glucose challenge.  (Van de Berghe G, et al. NEJM 2006;354-449-61.)  In this latter study there was no benefit to intensive insulin therapy.

            The current study is a multicenter, randomized, open-label study of both intensive insulin therapy and hydroxyethyl starch in patients with severe sepsis.  The study was conducted from April 2003 to June 2005 in 18 multidisciplinary ICUs at academic tertiary hospitals in Germany.  The study was designed to detect a decrease in mortality from 40% to 30% at 28 days.  Enrolled patients had to have the onset of severe sepsis or septic shock either 24 hours before ICU admission or less than 12 hours after ICU admission.  The primary end points were the rate of death from any cause at 28 days and morbidity.  Since we do not use HES in the ED for volume resuscitation, I will focus on intensive insulin therapy.

            The insulin arm of the study compared intensive insulin therapy to conventional insulin therapy.  In the conventional group, insulin was given when glucose values were > 200 mg/dL, with the goal of maintaining glucose between 180 – 200 mg/dL.  In the intensive insulin group, insulin was given when glucose values were > 110 mg/dL, with the goal of maintaining glucose between 80 – 110 mg/dL.  Treatment ended at either discharge from the ICU, death, or a total of 21 days of therapy were reached.

            Five hundred thirty seven patients were enrolled, 290 in the conventional insulin group and 247 in the intensive insulin group.  Baseline patient characteristics including age, pre-existing co-morbidities, sites of infection, lab values, and hemodynamic variables were similar between the groups.  Total nutritional intake, including glucose, was similar in both groups.  Interestingly, the majority of patients had nosocomial acquired infections and over 60% in both groups were given hydrocortisone.  Overall, there was no significant difference in the rate of death between the intensive and conventional insulin therapy groups.  Furthermore, there was no significant difference in morbidity between the two groups.  As one might expect, there was significantly more hypoglycemic episodes in the intensive insulin therapy group (17% vs. 4.1%).  Although no deaths were attributable to hypoglycemia, there were more “life threatening” episodes of hypoglycemia in the intensive insulin group.  As a result of the increase in hypoglycemic episodes the study was stopped early.

            Take Home Point:  In this patient population with severe sepsis, intensive insulin therapy, using a continuous infusion, to maintain glucose between 80 – 110 mg/dL did not improve mortality.  It did, however, result in significantly more hypoglycemic episodes (glucose < 40 mg/dl).  Many EDs across the country are now developing and implementing sepsis protocols primarily based upon the SSC Guidelines.  Based upon this study, intensive insulin therapy may not be a necessary component to the ED management of patients with severe sepsis or septic shock.


Category: Toxicology

Title: Sleeping Pills

Keywords: zolpidem, benzodiazepines, eszopiclone (PubMed Search)

Posted: 2/28/2008 by Fermin Barrueto, MD (Updated: 12/9/2019)
Click here to contact Fermin Barrueto, MD

Both dealing with the adverse effects from therapeutic administration, like when you order it on the floors or take yourself - to the overdose setting. Here is a brief list of the common sleep aids, MOA and toxicity. (Zolpidem or Ambien gets the award for most entertaining adverse effect of "Sleep Eating")

  • "Unisom": there are multiple formulations, most have diphenhydramine or some derivative. Toxicity is anticholinergic and Na channel blockade in overdose. Be aware that some have doxylamine which causes atraumatic rhabdomyolysis.
  • Zolpidem (Ambien): Nonbenzodiazepine hypnotic, with sedation as the primary effect though the reports of hallucinations, "sleep eating" and "sleep coitus" have been made famous.
  • Eszopiclone(Lunesta): Nonbenzodiazepine hyponitic, mechanism of action unknown. Does not require a controlled substance Rx but is expensive. Toxicity: metallic taste next day, minimal toxicity reported.

Category: Neurology

Title: Head and Neck Exam in the Dizzy Patient

Keywords: dizzy, head and neck examination, heent (PubMed Search)

Posted: 2/28/2008 by Aisha Liferidge, MD (Updated: 12/9/2019)
Click here to contact Aisha Liferidge, MD

Be sure to perform a thorough head and neck examination in the dizzy patient, as the etiologic source is often due to ear, nose, and throat pathology, such as structural abnormalities, some of which may even signal a more widespread process

Such common physical examination findings may include the following:

  • cerumen impaction
  • otitis media with effusion
  • chronic otitis with otorrhea
  • chronic sinusitis with nasal airway obstruction
  • orophayrngeal findings consistent with sleep apnea
  • congenital abnormalities of the pinna, external auditory canal, and face may suggest labyrinthine involvement

 


Category: Critical Care

Title: D-Dimer in the critically ill

Keywords: d-dimer (PubMed Search)

Posted: 2/26/2008 by Mike Winters, MD (Updated: 12/9/2019)
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D-Dimer in the Critically Ill

  • Diagnosis of VTE in the critically ill can be challenging and these patients are at high risk for the disease
  • Only 3.6% - 16% of critically ill patients have a negative d-dimer, regardless of the presence or absence of VTE
  • Even in patients with low pretest probability, d-dimer in the critically ill is of limited utility

Crowther MA, et al. Neither baseline tests of molecular hypercoagulability nor D-dimer levels predict deep venous thrombosis in critically ill medical-surgical patients. Intensive Care Med 2005;31(1):48-55.


Category: Vascular

Title: New BP Medication To Be Aware Of

Keywords: BP, Hypertension, Angioedema (PubMed Search)

Posted: 2/26/2008 by Rob Rogers, MD (Updated: 12/9/2019)
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Direct Renin Inhibitor-Aliskiren (Tekturna)

This drug is the 1st in a new class of antihypertensives called direct renin inhibitors-1st approved in 2007. This drug, along with three others being developed, inhibits the entire Renin-Angiotensin-Aldosterone System (RAAS) which has been shown to lead to definitive 24 hour blood pressure control.

Why should emergency physicians care, you ask?

  • It is only matter of time before we start seeing patients on this drug. I saw my first just a few weeks ago, and according to some of our nephrologists we can expect to see a whole lot more.  Emergency Physicians should at the very least know about this new class of drug.
  • Side effects of the drug are similar to ACE inhibitors (ACE-I), like hyperkalemia.
  • The drug can cause angioedema, so development of angioedema on this drug pretty much takes all three angiotensin drugs (ACE inhibitors, angiotensin receptor blockers, and direct renin inhibitors) off the list of potential BP meds for the patient. All three can cause angioedema.

J Hypertension March 2007


Category: Cardiology

Title: AMI after negative stress test

Keywords: acute myocardial infarction, stress test (PubMed Search)

Posted: 2/24/2008 by Amal Mattu, MD (Updated: 12/9/2019)
Click here to contact Amal Mattu, MD

Just a reminder, after a recent case of a patient that had a large AMI the day after a negative dobutamine stress test...

Neither stress testing nor coronary angiography are definitive for ruling out unstable/vulnerable plaques. If the HPI for your patient is very concerning, don't obviate your concern just because of a recent negative stress test or angiography. These tests are good at identifying large occlusions, but they tell us nothing about recent rupture or about composition of the plaques, and we now know that it is the composition that determines plaque instability. Size doesn't always matter...


Category: Obstetrics & Gynecology

Title: Ultrasound in Pregnancy

Keywords: Ultrasound, ectopic, pregnancy (PubMed Search)

Posted: 2/24/2008 by Michael Bond, MD (Updated: 12/9/2019)
Click here to contact Michael Bond, MD

Ultrasound in Pregnancy

  1.  A full bladder is needed for Transabdominal Ultrasound and an empty bladder for transvaginal ultrasound.
  2. A gestational sac should be visible on transabdominal ultrasound with a quantative HcG of 5000-6000 mIU/ml, and a quant of 1500-2000 mIU/ml on transvaginal.
  3. When taking photos, ensure that you show all of the applicable landmarks.  [i.e.: bladder, and uterus]  If you just zoom in on the pregnancy anybody else (i.e.: your expert witness) reading the scan will not be able to confirm that the pregnancy is in the uterus.
  4. To confirm an IUP, you must see the yolk sac within the gestational sac.  A double decidual sign is an early sign of pregnancy but it is not always seen and should not be relied upon.
  5. If you have a confirmed IUP an additional ectopic pregnancy is extremely unlikely unless the patient was taking medication to stimulate their ovaries (i.e. Infertility treatment).  If on stimulation therapy a very thorough exam needs to be done to look for additional pregnancies.
  6. If Quant >2000 mIU/ml and there is no evidence of an IUP, patient needs to be treated as an ectopic pregnancy.

Category: Pediatrics

Title: Cerebral Edema and Pediatric DKA

Keywords: DKA, Cerebral Edema, Mannitol, Risk Factors (PubMed Search)

Posted: 2/22/2008 by Sean Fox, MD (Updated: 12/9/2019)
Click here to contact Sean Fox, MD

Cerebral Edema in Patients with DKA

  • Cerebral Edema is a rare, yet catastrophic complication of Pediatric DKA.
    • Occurs in ~1% of episodes of pediatric DKA
    • Mortality rate of 40-90%; 20-40% of survivors have lasting Neuro Sequelae.
  • Risk Factors
    • High initial BUN
    • Low paCO2
    • No increase of the sodium during therapy
    • Treatment with bicarbonate
  • Diagnosis is made clinically
    • Warning Signs = Headache, Vomitting, Lethargy, Bradycardia, and Hypertension
    • Keep Mannitol (0.25-1.0 grams/kg) at the bedside.  Administer it and stop IVF once you suspect Cerebral Edema.

      Glaser N, et al: Risk factors for cerebral edema in children with DKA. NEJM.2001:344:264-9
       

Category: Toxicology

Title: Influenza Treatment - Tamilfu Adverse Reactions

Keywords: influenza, tamiflu, oseltamivir (PubMed Search)

Posted: 2/21/2008 by Fermin Barrueto, MD (Updated: 12/9/2019)
Click here to contact Fermin Barrueto, MD

Tamiflu (oseltamivir)

  • Must be administered within 48 hours of onset of symptoms
  • Patient must be 1 year or older
  • Rare cases of anaphylaxis, Stevens-Johnson, TEN and erythema multiforme have been reported.
  • Not proven safe in pregnancy nor harmful.

Category: Neurology

Title: What is the Romberg Test?

Keywords: Romberg Test, proprioception, dorsal columns, balance (PubMed Search)

Posted: 2/20/2008 by Aisha Liferidge, MD (Updated: 12/9/2019)
Click here to contact Aisha Liferidge, MD

  • Romberg testing is an important component of the neurological examination which assesses proprioception (i.e. sense of joint position/balance) which is a function of the dorsal columns of the spinal cord.
  • A Romberg test is performed by asking the patient to stand erect with their feet together and arms/hands at their side.  You first ask the patient to stand this way with their eyes open for 1 minute and then with their eyes closed for 1 minute.
  • A positive Romberg test results if the patient exhibits clear swaying or even falling ONLY when their eyes are closed.  This suggests that the patient's ataxia is sensory in nature (i.e. dorsal columns), rather than cerebellar.
  • Patients with cerebellar ataxia will typically loose their balance and sway even with their eyes open.
  • Classic neurological abnormalities associated with a positive Romberg test include tabes dorsalis (neurosyphilis) and sensory peripheral neurpathy, among others.
  • Be sure to cautiously standby while performing this test in order to protect the pateint should they fall.

 

 

 

 

 


Category: Critical Care

Title: Central Venous Pressure

Keywords: central venous pressure (PubMed Search)

Posted: 2/19/2008 by Mike Winters, MD (Updated: 12/9/2019)
Click here to contact Mike Winters, MD

  • The use of central venous pressure as a monitor of volume status remains very controversial in the critical care literature
  • Remember that CVP can be affected by many conditions
  • Important conditions that affect the accuracy of CVP include: 
    • right ventricular disease
    • tricuspid valve disease
    • pericardial disease
    • changes in intrathoracic pressure (PEEP, positive pressure ventilation) 
    • arrhythmias
    • reference level of the transducer

Category: Airway Management

Title: The Crashing Asthmatic

Keywords: Asthma (PubMed Search)

Posted: 2/18/2008 by Rob Rogers, MD (Updated: 12/9/2019)
Click here to contact Rob Rogers, MD

Care of the Crashing Asthma Patient

Several things should be considered in the crashing asthmatic:

  • First and foremost, there is very little date on how to manage the crashing asthmatic!
  • Any sick asthma patient should have IV fluid replacement-these patients have tons of insensible losses. IV fluids may also help with post-intubation hypotension cause by compression of the vena cava.
  • Many EM folks have left Ketamine in the dust for intubating an asthmatic....anecdotally, it works, but creates very sticky and tenacious lung boogers that are hard to suction. Why make your job even harder?
  • Sounds like common sense, but RSI the patient in the position of comfort (usually tripod) and then quickly lay them back supine.
  • Consider instituting the "kitchen sink approach" to asthma care. This includes beta agonists, anticholinergics, Mg, steroids, IVF, epi, nebulized Lidocaine, perhaps non-invasive ventilation, inhaled (yes, inhaled) steriods. Our job really begins once they have been tubed.
  • Sounds corny, but consider a "bedside coach." Believe it or not, some really sick asthmatics can be talked through a severe, life-threatening exacerbation. This can be a nurse, tech, physician. Someone to talk to them during this crisis. It works sometimes.
  • Any intubated asthmatic who goes into PEA arrest should not be declared dead unless bilateral needle decompressions and bilateral chest tubes have been performed.
  • If an intubated asthmatic codes once intubated, consider the following: (1) disconnect from the ventilator and bag VERY slowly...4-6 breaths/minute or even slower! (2) Although controversial, some consider manual chest wall compression helpful in "getting rid" of trapped air. (3) Vigorous IVF-positive pressure ventilation worsens the patients hyperinflation which compresses the vena cava, and (4) consider needle decompression and then chest tube insertion

Category: Cardiology

Title: adenosine and VT

Keywords: adenosine, ventricular tachycardia (PubMed Search)

Posted: 2/17/2008 by Amal Mattu, MD (Updated: 12/9/2019)
Click here to contact Amal Mattu, MD

Adenosine should never be used in the setting of a wide complex regular tachycardia as a diagnostic maneuver. Adenosine will convert some types of VT, and this may mislead the health care provider into thinking that the WCT is an SVT. The electrophysiology literature is rife with reports of "adenosine-sensitive VT," and these patients are often young and without prior history of CAD...the very patients that we'd most be inclinded to assume have SVT.

The bottom line is that one should always assume that a regular WCT (without obvious evidence of sinus tachycardia) is VT, and treat the tachydysrhythmia as such.


Category: Infectious Disease

Title: The Numbered Skin Rashes

Keywords: Dermatology, Rash, (PubMed Search)

Posted: 2/17/2008 by Michael Bond, MD (Updated: 12/9/2019)
Click here to contact Michael Bond, MD

Most of use remember that Fifth disease is a viral infection presenting with a distinctive rash (slapped check) caused by Parvovirus B19.  But do you know the numbering of the other six Contagious Illnesses that are associated with rashes:

  1. First Disease – Measles caused by the rubeola virus
  2. Second Disease – Scarlet Fever caused by Streptococcus pyogenes Group A
  3. Third Disease – German Measles caused by rubella virus
  4. Fourth Disease – Dukes Disease – In the late 1880-1900’s it was widely published about but in the 1960’s it was not proven to exist by either epidemiologic criteria or isolation of an etiologic agent.  Now felt to be a mild form of scarlet fever.  Some reports of it being caused by a Coxsackvirus or Echovirus
  5. Fifth Disease - Erythema infectiosum caused by Parvovirus B19. Slapped Check
  6. Sixth Disease - Exanthem subitum (meaning sudden rash), also referred to as roseola infantum (or rose rash of infants), sixth disease. Presents as rapid onset high fever, followed by a fine red rash when the fever subsides. Caused by Herpes Virus 6.

 


Category: Pediatrics

Title: Febrile Seizures

Keywords: Ferbrile Seizures, Bacteremia, Fever (PubMed Search)

Posted: 2/15/2008 by Sean Fox, MD (Updated: 12/9/2019)
Click here to contact Sean Fox, MD

Febrile Seizures

  • Diagnosis: Simple vs Complex
    • Simple Febrile Seizure
      • Age = 6mos to 5yrs
      • Single Seizure
      • Generalized
      • Lasting less than 15 minutes
      • Child returns to baseline and has normal neurological exam.
    • Complex Febrile Seizure
      • Same as above, except can be focal seizure or prolonged or with multiple seizures within 24 hours.
      • May indicate a more serious disease process.
  • Etiologies:
    • Viral illnesses are the predominant cause of febrile seizures.
      • Human herpes simplex virus 6 (HHSV-6) has been associated with about 20% of pts with first febrile seizures.
    • Shigella gastroenteritis also has been associated.
    • The rate of serious bacterial infections is similar to those found in pt’s with fever without a source
  • Key Point:
    • Do NOT forget to work-up the fever as you would for the patient’s age!
    • A lower threshold for performing full-sepsis work-up with LP is advocated in those pt’s less than 12 months of age.
       

Here are a couple of herbals touted as aphrodesiac's and the toxcity associated with them (the price of love):

Chan Su or "Love Stone" - A chinese herbal that is suppose to be topically applied, unfortunately all of the instructions are in chinese and those who ingest it will die a digoxin-like death. It has a compound that is essentially a potent digoxin-like substance.

Yohimbine - herbals that contain this can cause priapism -  shocker

 


Category: Neurology

Title: The Brainstem

Keywords: brainstem, cranial nerves (PubMed Search)

Posted: 2/14/2008 by Aisha Liferidge, MD (Updated: 12/9/2019)
Click here to contact Aisha Liferidge, MD

  • The brainstem is the lower extension of the brain that connects the brain to the spinal cord.
  • Neurological functions located in the brainstem include those necessary for survival (breathing, digestion, heart rate, blood pressure) and for arousal (being awake and alert).
  • Most of the cranial nerves come from the brainstem.  The brainstem is the pathway for all fiber tracts passing up and down from peripheral nerves and spinal cord to the highest parts of the brain.



Category: Critical Care

Title: Spontaneous pneumomediastinum

Keywords: spontaneous pneumomediastinum (PubMed Search)

Posted: 2/12/2008 by Mike Winters, MD (Updated: 12/9/2019)
Click here to contact Mike Winters, MD

 

Spontaneous Pneumomediastinum

  • Spontaneous pneumomediastinum is largely a benign disease typically seen in young males ages 18-21 years
  • It is typically caused by activities that increase alveolar pressure such as coughing, sneezing, vomiting, inhalational drug use, and Valsalva maneuver
  • The most common symptoms include chest pain and dyspnea; chest pain is usually centrally located, may radiate to the neck, and may be worse with inspiration
  • CT scan is the "gold standard"; CXR is a good place to start but it is normal in up to 30% of cases
  • The vast majority of patients do not require admission or supplemental O2
  • Advise patients to avoid strenuous activity until after symptom resolution (typically takes about 2 weeks)
  • Any patient with a fever, elevated WBC count, hemodynamic instability, severe dysphagia or odynophagia should first be evaluated for infectious mediastinitis or esophageal perforation (spont. pneumomediastinum is a diagnosis of exclusion in these patients)