“…The percentage of patients with persistent headache after an epidural blood patch was decreased when compared to patients receiving conservative treatment ( p = 0.03). An additional three retrospective chart review studies reported that the use of an epidural blood patch was effective in relieving post-lumbar puncture headaches in a high percentage of patients (Kokki, Sjovall, & Kokki, 2012; Ylonen & Kokki, 2002 A ; Ylonen & Kokki; 2002 B ). Four case studies also supported this trend (Cassady, Lederhaas, Turk, & Shanks, 2000; Kara et al, 2012; Liley et al, 2003; Roy, Vischoof, & Lavoie, 1995).…”