Critical care ultrasound in cardiac arrest. Technological requirements for performing the SESAME-protocol

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Authors

Daniel Lichtenstein, Manu L.N.G. Malbrain

Abstract/Text

The use of ultrasound has gained its place in critical care as part of our day-to-day monitoring tools. A better understanding of ultrasound techniques and recent publications including protocols for the lungs, the abdomen and the blood vessels has introduced ultrasound to the bedside of our ICU patients. However, we will prove in this paper that early machines, dating back more than 25 years, were perfectly able to do the job as compared to modern laptop machines with more features but few additional advantages. Ultrasound is not only a diagnostic tool, but should also be seen as an extension of the traditional physical examination. This paper will focus on the use of the SESAME-protocol in cardiac arrest. The SESAME-protocol suggests starting with a lung scan to rule out possible causes leading to cardiac arrest. Firstly, pneumothorax needs to be ruled out. Secondly, a partial diagnosis of pulmonary embolism is done following the BLUE-protocol. Thirdly, fluid therapy can be guided, following the FALLS-protocol. The SESAME-protocol continues by scanning the lower femoral veins to check for signs of deep venous thrombosis, followed by (or before, in case of trauma) the abdomen to detect massive bleeding. Next comes the pericardium, to exclude pericardial tamponade. Finally, a transthoracic cardiac ultrasound is performed to check for other (cardiac) causes leading to cardiac arrest. The emphasis is on a holistic approach, where ultrasound can be seen as the modern stethoscope needed by clinicians to complete the full physiological examination of their critically ill unstable patients.

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