UMEM Educational Pearls

Title: Pediatric out of hospital termination of cardiac arrest

Category: EMS

Keywords: TOR, pediatric cardiac arrest (PubMed Search)

Posted: 3/19/2025 by Jenny Guyther, MD (Updated: 12/5/2025)
Click here to contact Jenny Guyther, MD

A few states have pediatric out of hospital termination of resuscitation protocols.  This study used CARES data to create a termination protocol that was not only linked to ROSC, but also to neurological outcomes.  This study only included medical arrests.
 

21240 children were included in the study where 2326 patients survived to hospital discharge.  A total of 1894 survived with a favorable neurological outcome.  The criteria developed for pediatric TOR in this study had a specificity of 99.1% and a PPV of 99.8% for patient death.  Another set of criteria had a 99.7% specificity and PPV of 99.9% for predicting death or survival with poor neurological outcome.

TOR criteria of death consisted of:

  1. unwitnessed arrest

  2. asystole

  3. arrest not due to drowning or electrocution

  4. no sustained ROSC

TOR criteria of death or survival with poor neurological outcome:

  1. unwitnessed arrest

  2. asystole

  3. arrest not due to drowning or electrocution

  4. no sustained ROSC

  5. no bystander CPR

Bottom line: Pediatric termination of resuscitation in the out of hospital setting can be appropriate under the right set of conditions.

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Title: Lipohemarthrosis

Category: Ultrasound

Keywords: POCUS; MSK; fracture (PubMed Search)

Posted: 3/17/2025 by Alexis Salerno Rubeling, MD (Updated: 12/5/2025)
Click here to contact Alexis Salerno Rubeling, MD

On ultrasound, lipohemarthrosis—the presence of blood and fat in the joint cavity—is a key clinical indicator of an intra-articular fracture.  

Lipohemarthrosis appears as three distinct layers near the joint line.  

  • Superficial Layer- hyperechoic fat with circular anechoic fat globules 
  • Middle Layer- Anechoic Serum 
  • Deep Layer- Slightly hyperechoic, representing clotted blood 

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Title: Kidney injury grading scale

Category: Trauma

Keywords: kidney trauma, grading, (PubMed Search)

Posted: 3/16/2025 by Robert Flint, MD (Updated: 12/5/2025)
Click here to contact Robert Flint, MD

Unless a patient is unstable, renal injuries are managed non-operatively or endovascularly. Here is the
2025 Kidney Injury Grading Scale from AAST.
 

AAST          AIS

Grade   Severity                                            Imaging Criteria
I                    2                                         –Subcapsular hematoma <3.5 cm without active bleeding

                                                                 – Parenchymal contusion without laceration
 

II                   2                                        – Parenchymal laceration length <2.5 cm
                                                                 – HRD <3.5 cm without active bleeding
 

III                  3                                          – Parenchymal laceration length ?2.5 cm
                                                                  – HRD ?3.5 cm without active bleeding
                                                                  – Partial kidney infarction
                                                                  – Vascular injuries without active bleeding
                                                                  – Laceration extending into urinary collecting system and/or urinary extravasation

IV                  4                                             – Active bleeding from kidney
                                                                    – Pararenal extension of hematoma
                                                                    – Complete/near-complete kidney infarction without active bleeding
                                                                    – MFK without active bleeding
                                                                     – Complete/near-complete ureteropelvic junction disruption

V                    5                                           – Main renal artery or vein laceration or transection with active bleeding
                                                                    – Complete/near-complete kidney infarction with active bleeding
                                                                   – MFK with active bleeding

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Title: Patient care for Muslim patients during Ramadan

Category: Administration

Keywords: Ramadan, fasting (PubMed Search)

Posted: 3/15/2025 by Hanna Hussein, MD (Updated: 12/5/2025)
Click here to contact Hanna Hussein, MD

Ramadan is the holy month in the Islam faith, where observers will fast from sunrise to sunset.  This includes food, water, some medications, smoking and sex.  This can obviously have some impact on patients' health, especially when presenting to the ED.  Here are some considerations to keep in mind:

  • In general, there are exemptions to fasting for pregnant persons, children,  breastfeeding persons, and people travelling. 
  • Bleeding is considered a contraindication to fasting, so menstruating women are exempt.  Some people may interpret this to mean they cannot give blood or have lab work done, but there is an exemption for medical purposes
  • Volume status is probably the main area to be concerned about.  Always ask your patients if they are currently fasting and explain why IV fluids would be necessary

As with everything, maintaining cultural awareness and compassion will help to

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Title: Seizures By Age - The Simple Febrile Seizure

Category: Pediatrics

Keywords: pediatrics, fever, seizure (PubMed Search)

Posted: 1/9/2025 by Kathleen Stephanos, MD (Updated: 3/14/2025)
Click here to contact Kathleen Stephanos, MD

Simple Febrile Seizures are a very common cause for presentation to the Emergency Department. 

Up to 5% of children will have one in their lifetime, and a single febrile seizure increases risk of recurrence. 

Definition:

  • Age 6 months to 60 months (5 years)
  • <15 minutes of seizure activity
  • No focal seizure activity
  • Fever of >100.4 within 24 hours
  • 1 seizure within 24 hours
  • Return to baseline with no focal deficits
  • No history of seizures without fever (this is provoked

While not part of the formal definition, the following details are critical to obtain on history, and high risk features that should not be missed on initial evaluation:

  • Antibiotics use (within 48 hours of the seizure)
  • Vaccination status

Evaluation and Management:

Consider a finger stick

Most patients can be discharged to home after a period of observation - most use a 2-4 hour minimum. More recent literature suggests considering a longer observation period in patients who have seizures at lower core body temperatures (<39°C) or those with a history of recurrent simple febrile seizures (2 simple febrile seizures within 24 hours with return to baseline in between)

Obtain a lumbar puncture in all patients with symptoms of meningitis 

Consider a lumbar puncture, lab evaluation, and prolonged observation in patients who are under-vaccinated/unvaccinated/unknown vaccination status between 6 months and 12 months of age, or received antibiotics within the last 48 hours

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Title: Tenecteplase is FDA-approved for Acute Ischemic Stroke

Category: Pharmacology & Therapeutics

Keywords: tenecteplase, alteplase, stroke (PubMed Search)

Posted: 3/10/2025 by Ashley Martinelli (Updated: 3/13/2025)
Click here to contact Ashley Martinelli

On March 3, 2025, the FDA approved tenecteplase to treat acute ischemic stroke.  Historically, only alteplase was FDA-approved, but the stroke guidelines suggest tenecteplase as a reasonable alternative and many centers have made the change to use tenecteplase.  

The EXTEND-IA TNK trial showed benefit of tenecteplase over alteplase in patients who were candidates for mechanical thrombectomy.  The newer AcT trial found that tenecteplase was non-inferior to alteplase for patients eligible for thrombolysis, regardless of thrombectomy candidacy. There was no difference in safety outcomes, specifically ICH or angioedema in either trial.

Tenecteplase will soon be available in a new 25 mg vial with stroke-specific packaging (potentially as early as June 2025). Currently, there is only a 50 mg vial that is used for STEMI and PE which has higher maximum dosing compared to stroke.

The dosing is now recommended in weight-based groupings based on the supplemental appendix from the AcT trial. This is likely a change in practice for most centers that previously implemented tenecteplase for stroke before the FDA approval.  Consult with your stroke and pharmacy team to discuss potential protocol changes at your institution.

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Title: Droperidol: The Hack you didn't know was a hack!

Category: Gastrointestional

Keywords: Droperidol, abdominal pain (PubMed Search)

Posted: 3/13/2025 by Neeraja Murali, DO, MPH (Updated: 12/5/2025)
Click here to contact Neeraja Murali, DO, MPH

Many of us probably use droperidol for pain relief in the ED. If you don't, two recent studies highlight it's use in multimodal pain control:

-In the DRUGS study (2023), droperidol reduced opiod use (46% vs 60%), lowered pain scores (median of 9 vs 5), and decreased the need for antiemetics (60% vs 73%).  Before you ask - mean pain score wasn't reported!

-This study evaluated gastroparesis patients, with most common dose of droperidol being 1.25 mg IV

-the DREAMER study (2024) showed that pateitns receiving droperidol required fewer opiods (median 10 Morphine Milligram Equivalents vs 19.4 MME). No significant different in need for antiemetics

-This study evaluated abdominal pain patients, with 2.5 mg IV being the most common dose

Neither study found statistically significant differences in length of stay. Additionally, neither study reported major adverse effects or healthcare costs. Note that these were both single center trials as well. 

With droperidol shortages ongoing, suggestions were made to directly compare droperidol to haloperidol, with hopefully more research coming soon!

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So you have a patient who is pregnant and has abdominal pain. You, as the astute provider you are, decide to do an ultrasound to rule out an ectopic, and low and behold! You see a gestational sac and a yolk sac within the uterus! You show your patient, you both breathe a sigh of relief, and you discharge them…

But they return two weeks later, now hypotensive, excruciating pain, and extremely pale. On an emergent bedside ultrasound, you see copious amounts of free fluid, and OBGYN tells you, after they rush your patient to the OR, that it was an ectopic - but how? The pregnancy was in the uterus!

Welcome everyone to the world of interstitial and angular pregnancies, pregnancies that are much closer to the endometrium than normal ectopic pregnancies and therefore have a much higher chance of progressing further before they rupture, meaning that when they do, they are devastating!

To evaluate for these ectopics, make sure that you get a mantle distance on every pregnancy ultrasound you do looking for an ectopic. Mantle distance is measured from the end of the gestational sac to the outer edge of the thinnest side of endometrium. If your value is >0.8cm, you should be okay. If it's less than <0.5cm, you most likely have an ectopic. Between 0.5cm and 0.8cm, consult OB urgently or have extremely close follow up for your patient. 

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Title: Sarcopenia as a marker of frailty in trauma patients?

Category: Trauma

Keywords: Sarcopenia, trauma, ct scan (PubMed Search)

Posted: 3/9/2025 by Robert Flint, MD (Updated: 12/5/2025)
Click here to contact Robert Flint, MD

Having a readily measurable variable to identify frailty on admission for critically injured patients would help prognosticate morbidity, mortality, and discharge destination. Sarcopenia has been used to prognosticate length of stay, discharge destination, and physical function recovery in oncology and general surgery patients. Sarcopenia is defined as “age-related progressive loss of muscle mass and strength. The main symptom of the condition is muscle weakness. Sarcopenia is a type of muscle atrophy primarily caused by the natural aging process. Scientists believe being physically inactive and eating an unhealthy diet can contribute to the disease.” 1. This study looked at admission CT scan psoas muscle sarcopenia in 197 critically injured patients. The authors concluded:

“For trauma critical care patients, sarcopenia on admission CT was associated with dependent discharge destination and therefore is unfavourable. Defining sarcopenia early in a trauma patient’s critical care admission may help to identify those at risk of poor outcomes.” 2

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Lidocaine transdermal patches 

Frequently used for lower back pain.

 A single 5% patch contains 700mg of lidocaine.

There is low systemic absorption. 

Data supporting efficacy for lower back pain are limited. 

Best benefit in other neuropathic conditions such as post herpetic neuralgia.

Topical capsicum 

Underused, safe, non-sedating.

Potential treatment option for acute and subacute back pain (<3 months duration). 

Can be OTC or via prescription.

Available in cream, lotion and patches. 

Best used 3-4 times per day for maximal effectiveness.

Grade A recommendation from North American Spine Society.

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Title: Trauma outcome differences between males and females

Category: Trauma

Keywords: Male. Female, outcome, trauma (PubMed Search)

Posted: 3/6/2025 by Robert Flint, MD (Updated: 12/5/2025)
Click here to contact Robert Flint, MD

The Pan-Asia Trauma Outcomes Study database was reviewed for differences in in-hospital mortality and functional capacity at discharge between male and female trauma patients. There were 76,000 trauma patients from 12 Asian countries in this study. The authors concluded: “This study indicates no difference in the general trauma outcomes in the Asia Pacific between females and males. Although younger females with less severe injuries had better functional outcomes, this advantage disappeared in severe injuries and those over 50 years.” There were several differences in mechanism of injury and age of presentation. “With females more frequently represented in the ??50 age group (60.13%) compared to males (44.87%) (p?<?0.001). Trauma type also varied between sexes; 95.51% of females experienced blunt trauma compared to 93.65% of males (p?<?0.001). Anatomically, males predominantly sustained injuries to the head, face, thorax, abdomen, and upper extremities, whereas females more frequently suffered injuries to the lower extremities and spine (p?<?0.001).” This is similar toEuropean and North American data

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Title: ALS vs BLS level of care and trauma outcomes

Category: Trauma

Keywords: EMS, AlS, trauma, Bls, outcome (PubMed Search)

Posted: 3/5/2025 by Robert Flint, MD (Updated: 12/5/2025)
Click here to contact Robert Flint, MD

Large retrospective propensity matching study looking at mortality in trauma patients based on ALS vs.  BLS transport crew found lower mortality in those attended by ALS crews. The matching was “based on patient age, sex, year, ICD-10-CM based injury severity score, mechanism of injury, AIS based body region of injury, EMS characteristics including time with patient and prehospital interventions performed, prehospital vital signs, and trauma center designation.”
This is different than other studies which showed limited difference. other studies have shown improved survival with police “scooping and running” with penetrating trauma patients. 

 

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Title: Mechanical Ventilatory Strategies in Acute Brain Injury Patients -- The VENTIBRAIN Study

Category: Critical Care

Keywords: Mechanical Ventilation, Brain Injury, ICH, Stroke, Hypercapnea, Hypoxia, Hyperoxia (PubMed Search)

Posted: 3/4/2025 by Mark Sutherland, MD
Click here to contact Mark Sutherland, MD

Intubation and mechanical ventilation of brain injured patients, which is extremely common in the Emergency Department, can be very challenging and subject to significant practice variation.  It is often said that brain injured patients “can't take a joke”, meaning that they are less tolerant to hemodynamic and metabolic perturbations, and these perturbations tend to be associated with very large swings in their clinical outcomes.  For example, hypo/hyperglycemia, hypo/hypernatremia, hypo/hypertension, hypo/hyperoxia, hypo/hypercapnea, etc are all extremely important to avoid.  This is probably the one patient population where “euboxia” (the notion that we obsess too much about making all the numbers pretty in the EMR) is probably not as applicable.  As such, there is at least good physiologic rationale, and now increasing empirical evidence, that ventilating these patients very thoughtfully is extremely important and likely to have meaningful impact on patient-oriented outcomes (mortality, neurologic outcome, etc).

The VENTIBRAIN study was a prospective observation trial of 2,095 intubated patients in 26 countries who had TBI, ICH (including SAH), or acute ischemic stroke.  Interestingly, they found that patients with lower tidal volume (TV) per predicted body weight had higher mortality (although the majority of their TVs were well controlled and in a fairly tight range), which is contrary to conventional thinking in pulmonary pathologies like ARDS.  They also found that higher driving pressure (DP) was associated with higher mortality, which agrees with data from other conditions.  PEEP and FiO2 had U-shaped curves, but FiO2 in particular tended to favor lower FIO2, also similar to current thinking for ICU patients in general.  

Take Home Points:

  1. Although most brain injury patients have relatively normal pulmonary function, lung compliance, ventilator waveforms, etc, their ventilatory parameters (TV, PEEP, DP, pCO2/pH, oxygenation, etc) should be carefully monitored and a deliberate strategy to manage these parameters is essential.  Haphazard ventilatory strategies in these patients are clearly associated with poorer patient-oriented outcomes.
  2. It's possible (although not definitively proven) that aggressively low TVs in these patients may lead to hypercapnea - which we know is poorly tolerated in brain injured patients - and worse outcomes.  The role of classic “permissive hypercapnea” (ala ARDS management, goal pH > 7.2) in these patients is unclear, and one should probably be more judicious in letting these patients get overly acidotic or hypercapneic, as opposed to other pathologies like ARDS where this is probably more allowable.  
  3. Despite the paradoxical finding with low TVs, high driving pressure remains an important predictor of mortality in essentially all critical patient populations.   Care should be taken to minimize DP (guidelines say < 15 cm H2O, but goal should be minimum achievable value while meeting pCO2/pH targets).  DP/PEEP titrations should be carried out regularly when feasible (not all providers are comfortable with this practice, but it is safe and easy to learn, see references below).
  4. Hypoxia and hyperoxia are both extremely dangerous for this population.  The minimum FiO2 needed to achieve a pulse oximetry reading of around 90-96% (exact numbers vary slightly by guideline and any underlying pulmonary pathology) should be used.  Be very wary of the pulse ox sitting constantly at 100% in these patients.

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Title: POCUS for Retained Products of Conception

Category: Ultrasound

Keywords: POCUS, OB, retained products of conception (PubMed Search)

Posted: 3/3/2025 by Alexis Salerno Rubeling, MD
Click here to contact Alexis Salerno Rubeling, MD

A recent study evaluated the accuracy of POCUS in detecting retained products of conception (RPOC) in the emergency department.  

In this study, a patient was considered positive for RPOC if they had heterogenous material in the endometrium measuring 10 mm or more. Color Doppler was not used for further evaluation, though it has been cited in obstetric literature as a helpful tool.  

Among the 265 patients included, the prevalence of RPOC was 21.5%. POCUS had a sensitivity of 79.0 % and a specificity of 93.8 %. 

The authors caution against the use of POCUS to diagnose RPOC in the setting of early pregnancy, as the endometrium can have a variable appearance, increasing the risk of a misdiagnosis. Of the 22 false positives identified, more than half were potentially viable pregnancies. Uterine fibroids can also lead to a heterogenous appearance of the uterus and can be another potential false positive.

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Title: Geriatric Trauma: Rib and Pelvic Fracture Pain Management

Category: Trauma

Keywords: Trauma, geriatric, fall, pain management, fracture, rib, pelvis (PubMed Search)

Posted: 3/1/2025 by Robert Flint, MD (Updated: 3/2/2025)
Click here to contact Robert Flint, MD

Rib and pelvic fractures are common findings in geriatric trauma patients, even in low impact trauma such as falls from standing. Pain management is vital for improving morbidity and mortality. The IFEM White Paper suggests:

“Use multimodal pain management strategies, including regional anesthesia and non-opioid analgesics, to control pain without compromising recovery.
Monitor closely for complications such as pneumonia or hemodynamic instability, intervening promptly to mitigate risks.
Collaborate with physiotherapists to implement early mobility programs, reducing the risk of deconditioning and promoting recovery.”

A multidisciplinary team proficient in geriatric trauma care leads to better outcomes. This may require transfer to a trauma center.

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Title: Geriatric Trauma: Frailty

Category: Trauma

Keywords: Trauma, geriatrics, frailty (PubMed Search)

Posted: 3/1/2025 by Robert Flint, MD (Updated: 12/5/2025)
Click here to contact Robert Flint, MD

This white paper reminds us that age is just a number; frailty is a better predictor of morbidity and mortality after trauma. 
“Frailty, characterized by reduced physiological reserve and increased vulnerability to stressors, is a significant factor influencing recovery from trauma. Individuals with frailty may experience slower healing, higher rates of complications, and longer hospital stays. Tools such as the Clinical Frailty Scale (CFS) and the Trauma-Specific Frailty Index (TSFI) have been developed to assess frailty systematically, enabling clinicians to predict outcomes and guide treatment decisions.”

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Title: Attrition among Nurse Practitioners and Physician Assistants in Emergency Medicine

Category: Administration

Keywords: Nurse Practitioner, Physician Assistant, job satisfaction, burnout, longevity (PubMed Search)

Posted: 2/20/2025 by Steve Schenkel, MPP, MD (Updated: 2/26/2025)
Click here to contact Steve Schenkel, MPP, MD

Nurse Practitioners and Physician Assistants practice alongside Physicians in Emergency Departments. In 2021, an estimated 17,679 NPs and PAs worked in EDs.

How long do NPs and PAs continue in Emergency Medicine practice?

An analysis of Medicare data reports that over the eight years of the study, the annual attrition rate averaged 13.8%, or almost 1 in 7 leaving Emergency Medicine practice every year. At the time of attrition, the median age for women was 40.2 years (IQR 33.8 to 49.9) and for men was 45.9 (IQR 37.8 to 56.3).

For additional breakdown and discussion of these numbers, see Gettel CJ, Chosh R, Rothenberg, et al. Workforce Attrition Among Emergency Medicine Non-Physician Practitioners. Ann Emerg Med, in press, https://www.annemergmed.com/article/S0196-0644(24)01294-0/fulltext.



Title: Preventing VAP in the Critically Ill, Intubated Patient

Category: Critical Care

Keywords: Critically Ill, Intubated, Mechanical Ventilation, Ventilator-Associated Pneumonia (PubMed Search)

Posted: 2/25/2025 by Mike Winters, MBA, MD (Updated: 12/5/2025)
Click here to contact Mike Winters, MBA, MD

Non-Pharmacologic Measures to Prevent VAP

  • Ventilator-associated pneumonia (VAP) is one of the most common complications of mechanical ventilation and is associated with significant increases in morbidity and mortality.
  • With the persistence of the boarding crisis, many critically ill intubated patients remain in EDs for extended periods of time, thereby increasing their length of stay, morbidity, and mortality.
  • For the critically ill intubated patient, consider implementing the following non-pharmacologic interventions that have been shown to decrease the incidence of VAP:
    • Strict hand hygiene compliance
    • Elevating the head of the bed to 45 degrees, unless contraindicated
    • Utilize endotracheal tubes with subglottic secretion drainage
  • The following interventions have not been consistently shown to reduce VAP:
    • Continuous endotracheal cuff monitoring
    • Closed endotracheal suctioning systems
    • Silver-coated endotracheal tubes

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Point-of-care ultrasound (POCUS) measurement of the optic nerve sheath diameter (ONSD) has been shown to correlate with increases in intracranial pressure (ICP).

In adults, an ONSD measurement of less than 5 mm is considered normal, while a measurement greater than 6 mm suggests elevated ICP.

How to Measure the Optic Nerve Sheath Diameter:

  • Obtain a sagittal or transverse view of the orbit with the optic nerve in view.
  • Identify a point 3 mm posterior to the retina.
  • Measure the diameter of the optic nerve sheath at this depth.

A small cross-sectional study examined whether ONSD measurements varied when taken at different depths. The findings indicated that ONSD increased by 0.32 mm at a depth of 4 mm and decreased by 0.54 mm at a depth of 2 mm.

These variations highlight the importance of maintaining a consistent measurement depth. To ensure accuracy and avoid misinterpretation, the ONSD should always be measured 3 mm posterior to the retina.

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Title: Guidelines for prehospital traumatic arrest management

Category: Trauma

Keywords: Ems, trauma, arrest, resuscitation (PubMed Search)

Posted: 2/23/2025 by Robert Flint, MD
Click here to contact Robert Flint, MD

This position paper from American College  of Surgeons, NAEMSP, and ACEP outlines a literature based approach to prehospital care of traumatic circulatory arrest.  It logically could be applied to care in the hospital as well. Care of a traumatic arrest is different than a medical etiology arrest. 

“Emphasize the identification of reversible causes of traumatic circulatory arrest and timely use of clinically indicated life-saving interventions (LSIs) within the EMS clinician’s scope of practice. These include:

Epinephrine should not be routinely used, and if used should not be administered before other LSIs.

External chest compressions may be considered but only secondary to other LSIs.

Chest decompression if there is clinical concern for a tension pneumothorax. Empiric bilateral decompression, however, is not indicated in the absence of suspected chest trauma.

Airway management using the least-invasive approach necessary to achieve and maintain airway patency, oxygenation, and adequate ventilation.

External hemorrhage control with direct pressure, wound packing, and tourniquets.”

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