{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T21:24:27Z","timestamp":1783632267412,"version":"3.55.0"},"reference-count":50,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T00:00:00Z","timestamp":1747180800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Santa Casa de Miseric\u00f3rdia Fernand\u00f3polis"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Vasc Access"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>In the creation of arteriovenous fistulas (AVF) for hemodialysis, regional brachial plexus block (BPB) has a sympatholytic effect, increasing blood flow and diameters in the vessels.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>\n                      A prospective, randomized, clinical-surgical pilot study was carried out, comprising 40 patients, randomly allocated into two groups (BPB or local anesthesia\u2014LA). The diameter (veins and arteries), and the flow, peak systolic velocity (PSV), pulsatility index (PI), and pulsatility index ratio (PIR) of the arteries were evaluated before and after anesthesia. Flow was measured in the AVF at the end of the procedure and 30\u2009days after. To analyze pain perception, the visual analog scale (VAS) was applied during anesthesia (T1), during surgery (T2), and at discharge (T3). All analyses were performed using R v. 4.3.1. A\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      -value &lt;0.05 was considered statistically significant.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Comparing BPB with LA, in the pre- and post-anesthesia periods, there was an increase in the diameters of the cephalic and basilic veins (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and the ulnar artery (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001). There was a significant increase in the PSV of the radial and brachial (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and ulnar (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009=\u20090.0017) arteries. There was an increase in flow in the radial, ulnar, and brachial arteries (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001). There was a significant decrease in the PI for the radial (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009=\u20090.0022), ulnar and brachial (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001) arteries. The BPB group had a significant change in the PIR of the arteries (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Regarding pain perception, the BPB group presented a decrease at T2 (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>For this study, in the group that received BPB, there was an increase in the diameters of the arteries and veins as well as the flow and PSV of the arteries, and decreasing the PI, the PIR, and in the perception of intraoperative pain.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/11297298251336800","type":"journal-article","created":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T04:53:08Z","timestamp":1747198388000},"page":"273-282","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["The influence of combined regional anesthetic blockade, compared with local anesthesia, on hemodynamic parameters and pain criteria in patients receiving an arteriovenous fistula for hemodialysis"],"prefix":"10.1177","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3421-7710","authenticated-orcid":false,"given":"Luiz Gustavo","family":"Madi Antonio","sequence":"first","affiliation":[{"name":"Ribeir\u00e3o Preto Medical School, University of S\u00e3o Paulo, Ribeir\u00e3o Preto, S\u00e3o Paulo, Brazil; 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