title: Delayed Horner's syndrome following ultrasound- guided interscalene brachial plexus block.
abstract: We describe a case of Horner's syndrome that occurred shortly after post-operative bolus administration of interscalene brachial plexus analgesia.
authors.affiliation: Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Traiq
authors.initials: T
authors.lastname: Alzahrani
authors.affiliation: Department of Anesthesia, King Khaled University Hospital, Riyadh, Saudi Arabia.
authors.forename: Mouhannad
authors.initials: M
authors.lastname: Alnajjar
authors.affiliation: Department of Anesthesia and Orthopedic surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Abdulrahman D
authors.initials: AD
authors.lastname: Algarni
authors.affiliation: Department of Anesthesia and Orthopedic surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Abdulaziz
authors.initials: A
authors.lastname: Al-Ahaideb
keywords: Bupivacaine; interscalene block; ultrasound regional block