Periodicidad semestral: flujo continuo.
ISSN - Electrónico: 2661-6947 / DOI: 10.36015 • LILACS BIREME (19784); LATINDEX (20666)
Introduction: Arterial blood gas (ABG) sampling by direct vascular puncture guided by pulse palpation is a common procedure performed in the emergency setting. Reducing the number of attempts to draw arterial blood samples was one of our main goals. The other goal was comparing the standard technique with the ultrasound-guided arterial puncture. Methods: Prospective study in patients admitted to the Emergency Department at Carlos Andrade Marín Hospital, who needed arterial blood gas exams. Patients allocation to draw arterial blood by palpation or guided by ultrasound was chosen at random. Participants were adult patients who needed ABG analysis and excluded patients with any contraindication. The enrollment period lasted two months. The primary endpoint was the successful arterial blood gas sample obtained at first attempt. Failure was taken when patients required more than two punctures to obtain the blood sample. Surrogate endpoint was the amount of time employed in the procedure. Statistical analysis, including Fisher’s exact test for categorical variables and independent t-test for quantitative variables, was performed. Results: Ninety-eight patients were enrolled. Fifty were assigned to the ultrasound-guided group and 48 to the control group. The proportion of successful first attempts was 92% in the ultrasound group, and 91.6% in the control group . The amount of time required to draw the blood sample was similar in both groups (p= 0.91). Discusion: Arterial puncture guided by ultrasound was not more effective than the conventional technique to draw arterial blood sample by pulse palpation.
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