title: Epidural bubbles as a cause of incomplete analgesia during epidural anesthesia.
mesh_terms: D000767:Anesthesia, Epidural / Q000009:adverse effects* / Q000379:methods; D000768:Anesthesia, General; D002675:Child, Preschool; D004824:Epidural Space; D006801:Humans; D008297:Male; D009339:Needles; D011859:Radiography; D013115:Spinal Canal / Q000000981:diagnostic imaging; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging