UMEM Educational Pearls

Pain Management in the Critically Ill Patient

  • Pain is common, often underappreciated, and routinely undertreated in our critically ill patients.
  • Poorly treated pain has been shown to adversely affect both short- and long-term outcomes.
  • Key pearls when treating pain in the critically ill:
    • Vital signs should not be used in isolation to assess pain
    • Use a validated assessment tool to objectively quantify pain (i.e., Critical Care Pain Observation Tool)
    • An analgosedation strategy (analgesics before sedative medications) has been shown to decrease duration of mechanical ventilation and decrease ICU LOS
    • Opioids have no maximum or ceiling dose. The appropriate dose is that which controls pain with the fewest side effects.

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Question

Patient complains of facial and neck swelling, what's the diagnosis?

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Happy Halloween!! 

I hope you have had a safe and fun Halloween. Thank you to all the people that are staffing the EDs on a Saturday Night Halloween.

Prostate-Selective Alpha Antagonists have been tied to Falls and increased risk of fractues in elderly men.  These medications can lead to syncope and hypotension putting patients at increased risk of falls. A recent canadian study showed that at 90 days of use; individuals on alpha antagonists were at increased risk of hospital visits for falls (1.45% vs. 1.28%) or fractures (0.48% vs. 0.41%). There was also an increased risk of  head trauma.

Please warn patients that are on these medications of the risks, so that injuries can be minimized. They should take specific care when changing postural positions, and report episodes of lightheadedness to their PCPs.

The article can be found at http://www.bmj.com/content/351/bmj.h5398

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A recent study compared IV metoclopramide to IV acetaminophen for pain relief in primary headaches in the ED. 100 patients were randomized to either receiving 10 mg of IV metoclopramide, or 1 g of IV acetaminophen.
The results? Patients had better faster pain relief with acetaminophen IV (at 15 minutes, vs 30 minutes for Metoclopramide), and both drugs had the same therapeutic effect at 2 hours.
Bottom Line? Don't discount the benefit of acetaminophen in managing headaches in the ED.

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A traditional ED practice has been to combine promethazine as an anxiolytic adjunct to morphine for patients with musculoskeletal pain (eg back pain).

However, when compared to morphine alone, this combination does not lead to greater analgesia or decrease anxiety. It does however prolong ED length of stay.

This use of this "pain cocktail" is not recommended

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Category: Pediatrics

Title: Pediatric Urinary Tract Infections (UTI) (submitted by Marina Kloyzner, MD)

Keywords: UTI, Fever, febrile, AAP, clinical practice guideline (PubMed Search)

Posted: 10/23/2015 by Mimi Lu, MD
Click here to contact Mimi Lu, MD

Fever is the most common presenting symptoms to pediatric emergency departments 10-20%

Of these, 2%-7% have a final diagnosis of a urinary tract infection (UTI).
 
Timely diagnosis and treatment of UTI is important in the pediatric population as it can progress to pyelonephrits which can lead to scarring of the renal parenchyma and end stage renal disease.
 
A challenge for the ED physician is whether or not to pursue the diagnosis of UTI in a febrile child with viral URI. However, multiple studies have shown that having a documented URI does not significantly decrease the chance of having a concomitant UTI. Furtheremore, there is a correletion betweent having RSV bronchiolitis with fever and a concurrent UTI.
 
The latest definition of UTI from the American Academy of Pediatrics (AAP) requires both a urinalysis with pyuria or bacteria and a urine culture with more than 50,000 CFU/mL. 
 
Methods for collecting urine include urethral catheterization, suprapubic aspiration, clean catch collection and sterile urine bag.
 
Contamination rates for these methods are as follows:
  • Urine bag 46%
  • Clean catch 14-26%
  • Catheterization 12-14%
  • Suprapubic aspiration 1-9%
 
Because of the significant rates of contamination, catheterization and suprapubic aspiration are the recommended methods of obtaining urine in children younger than 3 years old.
 

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Category: Toxicology

Title: Lipid Emulsion Therapy - Propranolol OD

Keywords: propranolol, lipid emulsion (PubMed Search)

Posted: 10/22/2015 by Fermin Barrueto, MD
Click here to contact Fermin Barrueto, MD

There have been a variety of case reports that have been describing the effects of lipid emulsion therapy on severe hemodynamic overdoses. As time has gone on, we have realized that this therapy is not for all severe overdoses. The type of medication and its pharmacokinetic properties factor into the decision. There is minimal evidence and no ideal randomized control trials that will tell us what the right answer is but take beta-blockers for instance:

Atenolol - in overdose, consider hemodialysis, very effectively removed by HD [1]

Propranolol - very lipophilic and one of the few beta-blockers that can cause widened QRS, seizures as well as the prototypical hypotension and bradycardia.

Because of its lipophilicity, ability to cross the blood brain barrier and ability to cause lethal dysrrthmias, lipid emulsion therapy has been effective in reversing the clinically severe effects of a propranolol overdose. [2]

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Category: International EM

Title: Global Status Report on Road Safety 2015

Keywords: Road traffic, injuries, World Health Organization (PubMed Search)

Posted: 10/20/2015 by Jon Mark Hirshon, PhD, MPH, MD (Emailed: 10/22/2015) (Updated: 11/4/2015)
Click here to contact Jon Mark Hirshon, PhD, MPH, MD

The World Health Organization (WHO) has just released a report on the current status of road traffic safety globally.

  • 1.25 million people die each year from road traffic crashes
  • 90% of road traffic deaths occur in low- and middle- income countries
    • Only 54% of the world vehicles are in these countries
  • Countries in Africa have the highest death rates per capita
  • Vulneable groups include:
    • Motorcyclists (23% of global deaths)
    • Pedestrians (22% of global deaths)
    • Cyclists (4% of global deaths)

From a postive perspective, road traffic deaths are stabilzing even though the number of motor vehicles are rapidly increasing.

 

The bottom line- injuries are preventable.  Continued policy efforts, laws with enforncement, can save lives. Specific life saving legislation includes:

  • seat belt laws that apply to all occupants
  • maximum speed, such as urban speed limits of 50 Km/h (31 mph)
  • child restraint, based upon age, height or weight
  • helmet laws that apply to all drivers, passengers and road types
  • drink-driving laws with specific blood alcohol concentrations (e.g.: 0.05 g/dl or less)

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There is more than the standard preparations of plasma, platelets, and PRBCs in the blood bank. Certain patients will require these specialized preparations when a transfusion is required. Here are three to know:

  • Leukoreduced (PRBCs are run through a filter to reduce the total WBC burden)
    • Most of the blood in USA is leukoreduced
    • Should be requested for pre-transplant patients and patients who previously experienced febrile non-hemolytic reactions
  • Irradiated PRBCs (radiation incapacitates donor WBCs)
    • Irradiation prevents the fatal transfusion-associated graft versus host disease, which occurs in patients who are severely immunosuppressed or who are closely related to the blood product donors.
  • Washed RBCs/platelets (washing removes plasma, cell fragments and excess potassium)
    • Washed cells are used for neonates/pediatric patients due to sensitivity to potassium in normal products; in adults, it is used for patients with prior allergic reactions to blood products or IgA deficiency

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Question

8 year-old female presents with nausea, vomiting, double-vision and inability to move her left eye upwards after being kicked in the face at school. What's the diagnosis?

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Category: Pediatrics

Title: Seat Belt Sign in Pediatrics

Keywords: Blunt abdominal trauma, seat belt sign, pediatrics (PubMed Search)

Posted: 10/16/2015 by Jenny Guyther, MD
Click here to contact Jenny Guyther, MD

Our suspicion of significant abdominal injury increases when there is bruising across the abdomen in adults after a motor vehicle collision, but what about in children? A PECRAN analysis may have provided us with the answer.

Of 3740 pediatric patients after motor vehicle collision, 16% had a seat belt sign. Seat belt sign was defined as a continuous area of erythema, ecchymosis or abrasion across the abdomen due to the seat belt. 1864 children had CT scans of the abdomen. Intra-abdominal injuries (IAI) were more common in those children with seat belt sign than those without (19% versus 12%). Those with seat belt sign had a greater risk of hallow viscous or mesenteric injuries. There was no increased risk of solid organ injury. 33% of patients with seat belt sign did not have complaints of abdominal pain or tenderness on initial exam (with a GCS of 14 or 15); 2% of these patients underwent operative intervention for their injuries.

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Toxicity due to body packing and body stuffing can be a significant concern due to unknown quantity and/or substance that was ingested.

  • Body stuffers usually ingest small quantities of poorly wrapped illicit substance (intended for sale) to evade law enforcement.
  • Body packer ingests large quantities of well-packaged illicit substance for trafficking purpose. Rupture of these packets can potentially result in fatal toxicity.

A recent prospective observational case series compared the utility of CT abdomen/pelvis with and without PO contrast in identifying the ingested packets.

The gold standard comparison: surgical removal or expulsion of packets.

All patients received CT abd/pelvis with and without PO contrast.

A. Body stuffers (n = 24)

CT w/ PO contrast:

  • Positive: 7 (sensitivity 29.2%)

  • Negative: 17  

CT w/o PO contrast:

  • Positive: 9 (sensitivity 36.5%)

  • Negative: 15

All 24 patients passed ingested packets

B. Body packers (n= 11)

CT w/ PO contrast

  • Positive: 6 (sensitivity 60%)
  • Negative: 5

CT w/p PO contrast

  • Positive: 7 (sensitivity 70%)
  • Negative: 3

10 patients expulsed packets; one patient did not have any packets.

Conclusion

  • CT without PO contrast was better at identifying the ingested packets in both body stuffers and packers.

Bottom line:

  • CT abdomen/pelvis has limited clinical utility in identifying the packets (presence) among body stuffers. If symptomatic, appropriate supportive care should be initiated
  • Among packers who may experience life-threatening toxicity from the leakage/rupture of the packets, CT may be helpful to confirm the presence of packets and to follow the progress of expulsion of packets.
  • Caution should be exercised as CT did not identify packets (body stuffer or packers) in all patients in this case series.

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Category: Neurology

Title: Serotonin Syndrome (Part 2) - What Causes It?

Keywords: serotonin syndrome, SSRI, SNRI, MAOI, TCA (PubMed Search)

Posted: 10/14/2015 by WanTsu Wendy Chang, MD
Click here to contact WanTsu Wendy Chang, MD

 

Last month we discussed symptoms of serotonin syndrome and its diagnosis by the Hunter Criteria. Let's move on to what causes serotonin syndrome.

Serotonin Syndrome - What Causes It?

  • Serotonin syndrome is not an idiopathic drug reaction, but the result of excess serotonin in the nervous system.
  • It is classically associated with adminstration of two serotonergic agents, but it can occur after initiation of a single agent or increasing the dose of a serotonergic agent in individuals who are particularly sensitive to serotonin.
  • Although selective serotonin reuptake inhibitors (SSRIs) are most commonly implicated, there are other medications encountered in the Emergency Department that can also play a role in serotonin syndrome.

 

  • There are also reports of serotonin syndrome occuring with methadone, trazodone, and metaxalone (Skelaxin).
  • Serotonin syndrome is often under-recognized if the symptoms are not severe.  Thus a thorough medication history is important in its purely clinical diagnosis.

 

** Stay tuned for the conclusion on management of serotonin syndrome **

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  • A recent trial looked at the three common sites for central venous catheters in 3471 catheter insertions
  • The primary outcome was a composite of catheter-related bloodstream infection and DVT
  • The femoral line group had a higher risk of DVT and infections although the risk from both is still very low
  • Pneumothorax occurred in 1.5% of subclavian lines and 0.5% of jugular lines
  • Subclavian lines are thought to have lower infection rates due to a longer subcutaneous courses before entry. They also have the lowest bacterial bioburden and tend to be protected against disruption

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Question

5 year-old boy who presents with sudden onset hoarse voice, and drooling without a fever. 

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Category: Toxicology

Title: Dabigatran and Hemodialysis: Watch for the Rebound

Keywords: hemodialysis, dabigatran, rebound (PubMed Search)

Posted: 10/7/2015 by Bryan Hayes, PharmD (Emailed: 10/8/2015) (Updated: 10/8/2015)
Click here to contact Bryan Hayes, PharmD

In patients receiving renal replacement therapy as a treatment modality for dabigatran-related bleeding, watch for a rebound concentration increase after hemodialysis is stopped.

More than 50% of patients demonstrate a rebound effect with a median increase in dabigatran concentration of 33%.

OOIt is unclear whether this rebound effect is clinically
important, and whether this translates to prolonged clini-

It is unclear whether this rebound effect is clinically important, and whether it translates to prolonged clinically relevant bleeding. Extended hemodialysis sessions or consideration of CVVHD should offset this potential problem.

 

Bonus Pearl:

The North American Congress of Clinical Toxicology starts today and runs through October 12. Look for toxicology pearls and updates on Twitter under the official conference hashtag #NACCT15.

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Overall, suicide is the 15th leading global cause of death.  However, it is the 2nd leading cause among 15-29 year olds

  • Over 800,000 people die each year from suicide
  • 75% of these deaths occur in low- and middle-income countries
  • Most common methods of suicide globally are:
    • Pesticide ingestion (around 30%)
    • Hanging
    • Firearms

 

Suicides are preventable.  Interventions to decrease suicides include:

  • Reduce access to means of suicide
  • Alcohol policies that reduce the harmful use of alcohol
  • Early identification and treatment of patients at risk
    • Mental health disorders
    • Substance use disorders
    • Chronic pain syndromes
    • Acute emotional distress
    • Prior suicide attempts
  • Appropriate follow-up care for individuals who have attempted suicide

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Question

Patient presents after being started on an antibiotic for cellutlitis of lower extremity. What's the diagnosis and what are some other etiologic agents (name 3)

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Category: Pharmacology & Therapeutics

Title: Targeted Temperature Management's Effect on Drugs

Keywords: targeted temperature management, drug (PubMed Search)

Posted: 9/27/2015 by Bryan Hayes, PharmD (Emailed: 10/3/2015) (Updated: 10/3/2015)
Click here to contact Bryan Hayes, PharmD

An excellent new review article provides a detailed look at how the drugs we give are affected by targeted temperature management. Here is a helpful chart of drug alterations that have data in reduced body temperature states:

Other Important Points:

  1. Lingering effects of sedatives may confound prognostication and may even mimic brain death. Concentrations of remifentanil, propofol, and midazolam decrease during rewarming, whereas no change has been demonstrated for fentanyl, indicating that the pharmacokinetic alterations fentanyl incurs during induction and maintenance of hypothermia persist during and following the rewarming phase.
  2. Continuous infusions of analgesics, sedatives, and hemodynamic support agents may require closer monitoring and smaller incremental changes compared to normothermic states.
  3. The QTc interval is increased in TTM, though it has not been associated with an increased risk of torsades de pointes or in-hospital mortality.

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Category: Pediatrics

Title: Color-Coded Code Drugs: A Novel Idea in Pediatric Resuscitation

Keywords: pediatric, code, resuscitation, medication error (PubMed Search)

Posted: 10/3/2015 by Christopher Lemon, MD
Click here to contact Christopher Lemon, MD

A group from Colorado identified the high-stress of pediatric resuscitation as a high-risk setting for possible medication error. As such, they performed a prospective, block-randomized, crossover study with two mixed teams of docs (ABEM certified) and nurses, managing 2 simulated peds arrest scenarios using either:

  1) conventional “draw-up and push” drug administration methods [control] or

  2) prefilled medication syringes labeled with color-coded volumes correlating to the weight-based Broselow Tape dosing [intervention].

The objective was to compare the time of preparation and administration of a medication, as well as to assess dosing errors. Participants were blinded to the purpose during recruitment but unblinded just prior to running the scenarios.

The scenarios included advanced airway management and hemodynamic life support efforts to care for an 8-year-old or 8-month-old manikin. The intervention group received a standard 3-minute tutorial on the use of prefilled color-coded syringes just prior to their scenario. After completing the first scenario, the groups switched, utilizing the other sim with the other method of medication administration. After a 4-16 week “wash out” period, the groups reconvened to reverse the medication administration technique across the same 2 scenarios.

Each Broselow tape color zone corresponds to a narrow range of weights. The authors opted to designate medication dosing errors >10% above or below the correct range as critical dosing errors.

The results? Median time to delivery of all conventionally administered medication doses was 47 seconds versus the prefilled color-coded administration system-- 19 seconds. The conventional administration system saw 17% of doses with critical errors versus none for the prefilled color-coded syringe group.

These prefilled color-coded syringes are not currently manufactured. Should they go into commercial production, the hope is that such syringes would be longer and more narrow than conventional syringes to effectively elongate each color-coded section (the delineations for red and purple on a standard syringe differ by as little as 1/8-3/32 of an inch if you want to make your own!-- see picture).

 

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