A large-scale retrospective study of 3.7 million children found an association between radiation exposure from medical imaging and a small but significantly increased risk of developing hematologic cancers (primarily leukemia).
Finding: Cancer risk increased with cumulative radiation dose
Dose-Response: For the highest exposure group (50 to <100 mGy), the Relative Risk (RR) for hematologic cancer was 3.59 compared to no exposure.
Attributable Risk: An estimated 10.1% of hematologic cancers in the cohort may have been attributable to medical imaging radiation, with CT scans being a major contributor.
Vulnerability: Children are more susceptible to radiation-induced cancer due to their heightened radiosensitivity and longer life expectancy for the cancer to manifest.
Take Away: Providers should critically assess the necessity of high-dose imaging like CT scans and use the lowest effective dose or possible alternative imaging (e.g. US, MRI, etc.) to prevent unnecessary cumulative exposure.
Summary
Objective:
The study aimed to determine how a brief educational intervention could enable emergency medicine (EM) residents to use point-of-care ultrasound (POCUS) effectively to diagnose and manage shoulder dislocations in the emergency department (ED).
Methods:
Conducted at an academic teaching hospital in Miami, Florida.
Twenty EM residents (PGY1–PGY4) with no prior shoulder ultrasound training participated.
Residents received <1 hour of in-service training, including a short lecture, video instruction, and hands-on practice using a Sonosite M-Turbo ultrasound device.
Over one year (2016–2017), residents prospectively enrolled 78 adult patients with suspected shoulder dislocation.
POCUS findings were compared with x-rays (the gold standard) for accuracy.
Time to diagnosis and reduction confirmation were recorded.
Results:
55 of 78 patients were diagnosed with dislocation; 53 anterior, 1 posterior, 1 inferior.
POCUS achieved 100% sensitivity and specificity for diagnosing and confirming successful reductions compared to x-ray.
Ultrasound results were available ~22 minutes faster for diagnosis and ~27 minutes faster for reduction confirmation than x-rays (p < 0.0001).
Residents across all training years performed equally well.
POCUS also identified 14 fractures (12 confirmed by x-ray, 2 seen only on ultrasound).
Discussion:
A short educational session enabled residents to accurately use POCUS for shoulder dislocation diagnosis and management.
POCUS reduced diagnostic time, avoided radiation exposure, and may improve ED workflow and patient comfort.
Findings support including shoulder ultrasound as a core component of EM training, filling a current gap in national ultrasound education guidelines.
Limitations:
Convenience sample and single-center design.
Some selection bias and inherent limitations of POCUS-based studies.
Conclusion:
Emergency medicine residents can learn to diagnose and manage shoulder dislocations with excellent accuracy after brief ultrasound training. POCUS should be integrated into EM residency curricula as a core skill for musculoskeletal emergencies.
We have all been there – an ED patient with circulatory shock requiring vasoactive medications and, therefore, an arterial line for accurate and close monitoring of the MAP and appropriate titration of the infusions. But does it save lives?
The recently published NEJM article by Muller et al. takes a look at noninvasive BP monitoring (NIBP) by cuff versus early arterial catheterization in patients with hypotension and evidence of tissue hypoperfusion:
Bottom Line: This trial indicates that in appropriately-selected patients with shock, such as those not on high doses of vasopressors, with BMI < 40 and an ability to consistently obtain NIBP measurements, early arterial line placement in the ED for vasopressor titration is unlikely to improve outcomes. It is important to note other potential indications for arterial line placement (severe hypoxia, inability to obtain reliable SpO2 with need for ABG monitoring, cardiac arrest, pain related to NIBP cuff monitoring, intracranial hemorrhage, etcetera) may still make arterial line placement in the ED prudent and better for overall patient care.
*France refers to norepi by the tartrate formulation dose, US refers to the base norepi dose (ratio is 2:1 tartrate: base).
POCUS can be performed at the bedside to evaluate for acute scrotal conditions, including testicular torsion and inflammatory processes such as epididymo-orchitis.
A high-frequency linear transducer is typically used to scan the scrotum in two different planes. Additionally, a coronal "buddy view"—displaying both testes side by side—can aid in comparing echogenicity and vascularity.
On B-mode imaging, both testicular torsion and inflammatory conditions may present with testicular swelling and decreased homogeneity. However, color and power Doppler imaging can help to differentiate:
Inflammatory conditions (e.g., epididymo-orchitis) typically show increased vascular flow on color and power Doppler.
Testicular torsion usually demonstrates reduced or absent flow in the affected testis. However, in cases of intermittent torsion-detorsion, vascular flow may appear preserved or even increased. In such scenarios, repeat Doppler imaging after one hour may help clarify the diagnosis.
Intraabdominal infections leading to sepsis can come from cholecystitis, small bowel perforation, gastric perforation, left sided colonic diverticulitis, right sided diverticulitis and appendicitis. When to initiate source control and antibiotics is controversial. These authors propose breaking patient populations into three groups:
From this they propose algorithms to treat these intraabdominal infections such as (note the different approach to right and left diverticulitis):
This article looks at source control as it relates to intrabdominal sources for sepsis. Key take aways are:
Those at high risk of morbidity and mortality from intraabdominal infection associated sepsis include:
Mild–moderate immune deficiency: Elderly (according to the age and general status of the patient), Malnourished, Diabetic, Burns, Trauma, Uremic, Active malignancy, not on chemotherapy, HIV with CD4+ count >200/mm3, Splenectomized, Severe immune deficiencyAIDS HIV with CD4+ count <200/mm3, Transplant (solid organ, bone marrow), High-dose steroids (more than 20 mg/day prednisone), Malignancy on chemotherapy, Neutrophil count <1,000/mm3
High-risk population (medical or surgical causes)Low serum albumin concentration Older age Obesity Smoking Diabetes mellitus Ischemia secondary to vascular disease or irradiation Prolonged or delayed/late procedures
Comparing prescribing patterns from early 2000s to late 2010s in the National Hospital Ambulatory Medical Care Survey, these authors found we continue to under prescribe pain medications to non-white patients for traumatic injuries.
A prospective cohort of South Korean patients over 65 years admitted from the ED with critical illness had Clinical Frailty Scale (CFS) performed on them. Those with a high CFS had increased 3 month mortality. CFS helps us prognosticate morbidity and mortality in our older critically ill patients.
Food for thought on this Thanksgiving eve…
AI is rapidly being integrated into the practice of emergency medicine, as well as many other medical specialties. Similar to the adage, "you are what you eat," AI is what we feed it. See below for an introduction to the various levels of bias contributing to the machine learning process:
For a deep dive into the world of bias in AI, see referenced article.
Settings: this is a meta-analysis of 17 observational studies about boarding of critically ill patients in US Emergency Departments. All studies were from urban, academic centers.
Participants:
Outcome measurement: all cause mortality, as reported by the authors of the original studies.
Study Results:
Discussion:
Conclusion:
Critically ill patients boarding in the U.S. Emergency Departments were associated with a non-statistically signi?cant increase in odds of mortality and hospital length of stay compared to non-boarded patients
The role of sodium bicarbonate in the treatment of severe acidemia has been controversial, with some studies suggesting no benefit, and others indicating that it may help reduce need for renal replacement therapy (RRT) and even improve mortality. The BICARICU-2 Trial was an open-label multicenter RCT conducted in France that evaluated the impact of a bicarb infusion among patients with metabolic acidosis and moderate to severe AKI.
There was no difference in 90 day mortality, but patients in the bicarb group were less likely to be started on RRT (38% vs 47% in the control group) using pre-defined criteria for RRT initiation, and had a 50% lower rate of bloodstream infections. Patients in the bicarb group who were started on RRT met criteria for RRT later than those in the control group (median 31h vs 15.5h).
Study Details:
Patient Population:
Intervention:
RRT Triggers:
Treatment of Staphylococcus aureus bacteremia has traditionally required several weeks of intravenous antibiotics. This approach carries medical risks, such as catheter-associated infection or thrombosis, as well as significant social and financial burdens for patients. Dalbavancin, a long-acting intravenous lipoglycopeptide with activity against S. aureus (including MRSA), has been proposed as a more convenient alternative. This study evaluated the efficacy and safety of dalbavancin compared with standard therapy for S. aureus bacteremia.
Two hundred adults were enrolled in this open-label, randomized clinical trial, which was conducted in the United States and Canada. After blood cultures cleared, participants were randomized to complete therapy with dalbavancin (administered on Days 1 and 8) or with standard treatment (cefazolin for MSSA and vancomycin or daptomycin for MRSA).
The primary outcome was the Desirability of Outcome Ranking (DOOR) at Day 70, incorporating five domains: clinical success, infectious complications, safety events, mortality, and health-related quality of life.
Dalbavancin was not superior to standard therapy for treating S. aureus bacteremia, and adverse events were similar between groups. A key strength of this study was the inclusion of people who inject drugs, a population at high risk for S. aureus bacteremia and often underrepresented in trials. A major limitation was that the DOOR metric did not account for important social and economic factors, such as disposition (home versus skilled nursing facility), caregiver burden, or treatment cost.
Key Takeaway: Dalbavancin may be a suitable alternative to traditional therapy for Staphylococcus aureus bacteremia, offering less frequent dosing and a shorter treatment course. Further research is needed to identify which patients benefit most and to evaluate its impact on social and economic factors such as discharge disposition, caregiver burden, and treatment costs.
In 252 mild traumatic brain injury patients seen at 3 level I centers that were given the Rivermead Post Concussion Symptoms Questionnaire within 24 hours of arrival, 3 month post concussive symptoms were significantly correlated with their score on the questionnaire. This questionnaire take 3 minutes to complete. This may be helpful in prognosticating who will have post-concussive symptoms and who will need additional follow up.
Turf Toe:
Increased recent attention due to injuries in high profile athletes
Sprain of the first MTP joint
Mechanism: Forced hyperextension of the great toe (most common)
https://briandorfman.com/wp-content/uploads/2015/11/b_12_3_6a.jpg
Causes injury to the MTP joint capsule and surrounding ligaments
Presents as pain, swelling, discoloration, tenderness to palpation, possible joint laxity
Pain with active and passive ROM (both flexion and extension)
Graded 1-3 (Sprain, partial rupture, significant/complete rupture)
Most commonly seen in athletes who compete on artificial turf.
More rigid than natural grass
Synthetic surfaces do not release cleats as easily as natural grass
Improved synthetic surfaces perform more similar to natural grass
Much higher incidence in games vs practices.
In football, quarterbacks and running backs at highest risk
Between 30 and 45% of professional football players claim that they have experienced a turf toe injury, with over 80% of those injuries occurring on artificial turf
The combination of more rigid synthetic surfaces and lighter, more flexible shoes, increase risk of hyperextension injuries
Treatment: usually non operative
Rest/ice/taping after acute swelling decreased/stiff sole shoe/crutches/NSAIDs.
Consider walking boot or short leg splint for severe injuries
Less than 2% of injuries require surgery
Children account for up to 20% of emergency department visits. In the US, up to 90% of children’s visits to emergency departments are to general EDs. The weighted pediatric readiness score (WPRS) was developed to assess the level of readiness of emergency departments to care for pediatric patients. The last assessment was in 2013 showed a mean score of 68.9. High readiness scores have been associated with decreased mortality. The same holds true for children with injuries presenting to trauma centers. The higher the WPRS score, the lower the risk of in hospital death. There was no difference if the patient presented in cardiac arrest. A 10 point increase in WPRS is associated with a lower odds of potentially avoidable transfers in both trauma and medical patients. More recent data has been collected, but has not yet been published. More information on pediatric readiness (for hospitals and EMS) can be found at: https://emscimprovement.center/domains/pediatric-readiness/.
Bottom line: Being Pediatric Ready improves the care of children.
In reviewing the limited literature available, the authors found that fascia iliaca blocks did not improve mortality but did improve hospital length of stay, decreased opiate use, and decreased delirium rates. More research is needed, however this tool should be added to our multimodal pain control toolbox.
Early defibrillation is a key step in the cardiac arrest chain of survival. Public Access AEDs may be available more readily than waiting for first responders. Outside of simple awareness of where AEDs are located, there are newer ways to become aware of public AEDs near a cardiac arrest including cell phone apps or information given by 911. A British study showed that only 5.9% of AEDs were within 100 meters of the patient and 35% were within 500 meters. The distance between the AED and arrest may be a barrier for bystander AED use. This study looked to determine the time required to retrieve an AED and they hypothesized that a distance > 400 meters would be longer than the EMS response times.
This study used 15 women and 15 men to perform different runs in various environments in different seasons, retrieving AEDs at 200m through 600m and bringing it back to the patient. In these scenarios, only the 200m distance (400 m round trip) times were deemed to allow enough time to apply and use the AED prior to EMS arrival. Barriers to AED retrieval included traffic lights, cars, weather and pedestrians.
This is an actual patient case:
65 y/o pt intubated for hemoptysis and started on nebulized transexamic acid. Overnight, the pt is found to have severe breath stacking/auto-PEEPing and consequently is started on neuromuscular blockade. The pt has no history of asthma or COPD and the ETT is clear without obstruction.
Ventilator waveforms are as shown. What is the issue?
This group looked at 88 patients intubated for penetrating neck injury and found 95% received neuromuscular blocking agents, 73% were intubated using a bougie, and 95% were intubated on first pass.
The authors concluded; “Rapid sequence intubation with bougie use was an effective default approach to definitive airway management in ED patients with penetrating neck trauma.”
