Imaging

POCUS – We Can…But Should We?

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POCUS in the ED can lead to clinically useful information, although research has not yet demonstrated patient-centered improvements in care. While this modality shouldn’t be used for routine screening in the ED, it performs well with a focused clinical question.

Sources
PoCUS: Just because we can doesn’t mean we should. Acad Emerg Med. 2022 Apr;29(4):515-517. doi: 10.1111/acem.14474. Epub 2022 Mar 22.
Risk-Benefit Analysis of PoCUS for Suspected, Ruptured Abdominal Aortic Aneurysm. Acad Emerg Med. 2022 Apr 14. doi: 10.1111/acem.14506. Online ahead of print.

Prevalence and Significance of Incidental Findings on CTPA

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Computed tomography pulmonary angiography (CTPA) yields an alternative diagnosis to pulmonary embolism (PE) in ~40% of patients with a negative PE study. Alternative diagnoses are more likely to occur in patients with increased age and in patients referred from the hospital setting (ICU or inpatient unit).

Source
Prevalence and significance of incidental findings on computed tomography pulmonary angiograms: A retrospective cohort study. Am J Emerg Med. 2022 Apr;54:232-237. doi: 10.1016/j.ajem.2022.01.064.

Clear as Mud – Is Your Management of Diverticulitis Evidence-Based?

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There are few studies that address the overall diagnosis and management of acute left sided colonic diverticulitis; many, over the past 3 decades, have poor strength of evidence or are largely inconclusive.

Source
Diagnostic Imaging and Medical Management of Acute Left-Sided Colonic Diverticulitis : A Systematic Review. Ann Intern Med. 2022 Mar;175(3):379-387. doi: 10.7326/M21-1645. Epub 2022 Jan 18.

Can You Spot a Ruptured AAA? Accuracy of Symptoms, Signs, CTA, and POCUS

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Symptoms and signs of ruptured abdominal aortic aneurysm (rAAA) are frustratingly insensitive. CTA is essential and is accurate. POCUS can accurately tell you a AAA is present but is not meant to diagnose rupture.

Source
Accuracy of Presenting Symptoms, Physical Examination, and Imaging for Diagnosis of Ruptured Abdominal Aortic Aneurysm -Systematic Review and Meta-Analysis. Acad Emerg Med. 2022 Feb 27. doi: 10.1111/acem.14475. Online ahead of print.

No LP if CT Negative Out to 24 Hours?

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When using multislice CT (MSCT) scanners this study suggests it may be possible to extend the timeframe from headache onset within which aneurysmal subarachnoid hemorrhage (aSAH) can be effectively ruled out with imaging alone. They found that when MSCT was employed within 24 hours of symptom onset, the sensitivity of detecting aSAH remained 100%.

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