Evaluation methods
All patients were hospitalized for seven days after surgery and telephoned for follow up. The operative time was recorded from cutting mucosa to finishing hemostasis. Postoperative pain was recorded through visual analogue scale (VAS) at 8 AM on the first, third, seventh and fourteenth postoperative days. Pain severity was scored from 0 to 10, which 0 means no pain and 10 means the most severe pain(4).
The pseudomembrane growth and shedding time were observed and recorded by the same observer at 8 AM every morning. The pseudomembrane growth time was recorded as tonsil fossa was completely covered by white fibrous membrane. The time when the white fiber membrane completely falls off is the pseudo-membrane fall off time.
Intraoperative bleeding loss is calculated by fluid volume of suction bottle and the weigh of cotton ball pre and post the surgery. Record whether the patient has bleeding from the first day to the fourteenth day after surgery.