“…PTH may have been reported as primary (generally defined as occurring within 24 hours of surgery), secondary (generally defined as occurring more than 24 hours postoperatively), or at an undefined or unspecified time. 8–108 Seventy-three studies contributed data to the meta-analysis (66 RCTs, 19,20,23,25,27,29,33,34,36,38–41,43,44,46,47,49,50,52–59,62–64,67,71,72,74–79,81–84,88–92,95,101–105,108–122 6 nonrandomized trials, 24,35,37,45,48,94 and 1 prospective cohort study 70 ). The resulting subset of studies included the following tonsillectomy techniques: cold dissection, electrocautery, coblation, harmonic scalpel, laser, molecular resonance, thermal welding, and microdebrider.…”