Sudden hypotensive and/or bradycardic events occur during shoulder surgery in the sitting position during interscalene block. In this study, we demonstrated that the presence of epinephrine in the local anesthetic mixture significantly increases the incidence of these events.
The 2-injection technique offers a success rate in blocking the 3 nerves innervating the hand similar to that obtained with the 3-injection technique. The latter approach should be considered when the musculocutaneous nerve distribution is involved in the surgical area.
Age is the most relevant single factor related to revision rate. Cross-linked PE has a statistical lower revision rate at 10 years compared to conventional PE and, in the OxZr group, the revision rate is 2 times lower than Co-Cr in the same group of age.
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