title: Using ultrasound in a case of difficult epidural needle placement.
authors.forename: Philip W H
authors.initials: PW
authors.lastname: Peng
authors.forename: Ayman
authors.initials: A
authors.lastname: Rofaeel
mesh_terms: D000767:Anesthesia, Epidural / Q000295:instrumentation / Q000379:methods*; D004824:Epidural Space / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009339:Needles; D009767:Obesity, Morbid; D013115:Spinal Canal / Q000000981:diagnostic imaging*; D014463:Ultrasonography