Purposes: To evaluate the effects on tear draining of single and double silicone tube intubation in dacryorhinostomy surgeries. To identify the approriate indications for single and double silicone tube intubation. Subjects and methods: Longitudinal, clinical trials with controls. Subjects: Patients with chronic dacryocystitis who underwent dacryorhinostomy surgeries at Cho Ray Hospital from 01/01/2011 to 31/12/2011 and who was followed up for 12 months. Sample size: a series of cases which included 60 eyes and was divided into 2 groups: treated with Mini-Monoka 51.1500 single silicone tube intubation and with 51.1010 double silicone tube intubation. Results: 55,2 percent of patients were from 35 to 50 years old
the average age was 46,3. There were more women thanmen, women/menratio was 53 (86,2 percent)/5(13,8 percent). Left eye: 51,7 percent. 2 patients suffered from chronic dacryocystitis in both eys (3,4 percent). The result of treatment was evaluated based on 3 criteria: stagnation at dacryorhinostomy, lacrimal pump and Jones' test. After 12 months, the group with double tube Intubation had the better results in tear drainage than the group with single tube Intubation (90,0 percent to 86,7 percent). However, the diffence was not significant. Bleeding during operations occurred for both groups, ranging from 10 percent to 13,0 percent. Other complications such as invasion into sinus and lacrimal lacerations occurred . from 6,7 percent to 10,0 percent. After operations, granulation tissues appeared in both groups, 10,0 percent to 13,3 percent. and usually disappeared after 3 months. Tube displacement occurred in both groups, single tube intubation: 10,0 percent and double tube intubation: 3,3 percent. The difference was significant (p=0,04). Vent dogging, Sum up syndrome occurred at the same rate in both groups. Conclusions: Chronic dacryocystitis is most commonly seen in people from 35 to 50 years old, on average 46,3 years old. It was more commonly seen in women than in men, with women:men ratio being 53/5. Six months after operations, the recovery of lacrimal pump was stable. The result of treatment was evaluated based on 3 criteria: stagnation at dacryocystitis, lacrimal pump and Jones' test. After 12 months, the group with double tube intubation had the better results in tear drainage than the group with single tube Intubation (90,0 percent to 86,7 percent). However, the dlffence was not significant. Therefore, the selection of the tube to use should be based on the physician's experience and skills, as well as the status of the patient's lacrimal ducts.