ABSTRACT
AIM: To compare the efficacy of conventional puncture versus ultrasound-guided puncture for arterial blood gas sampling in adults. METHOD: A search protocol was developed and applied to three databases (Medline, Cochrane, and Dialnet). Clinical trials published between January 2013 and January 2023, in Spanish or English, were considered. Outcomes in terms of first-attempt success, number of attempts until success, time taken, self-reported iatrogenic pain, and patient or professional experience were collected. The risk of bias for each included study was assessed. RESULTS: Five randomized clinical trials were selected, with sample sizes ranging from 50 to 238 adult patients treated in emergency settings. Three out of four studies showed higher first-attempt success rates when using ultrasound, and 2 out of 4 studies reported a decrease in iatrogenic pain. Discrepant findings were observed among the studies in terms of time taken and the number of attempts required for success. CONCLUSIONS: Although current evidence is limited and the findings are heterogeneous, ultrasound-guided arterial puncture may have advantages over conventional puncture in terms of first-attempt success and in reducing iatrogenic pain.
