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Braz. j. med. biol. res ; 50(5): e5846, 2017. tab
Article in English | LILACS | ID: biblio-839296


This study aimed to investigate the efficacy of minimally invasive tonsil surgery for the treatment of obstructive sleep apnea-hypopnea syndrome (OSAHS) in children. Tonsil ablation or turbinate reduction was performed on 49 pediatric patients with OSAHS by minimally invasive tonsil surgery. In order to evaluate the efficacy of surgery, a comparison was conducted between pre-operation and post-operation data in terms of the symptoms, signs and polysomnography test. Total effectiveness rate of the surgery was 83.7%. Subgroup analysis was also performed based on the severity of their conditions: mild, moderate, and severe groups had an effectiveness rate of 90.0, 88.9, and 66.7%, respectively (Hc=6.665, P<0.05). Postoperatively, the apnea-hypopnea index, the minimum oxygen saturation (SaO2), and corresponding symptoms improved compared to pre-operation conditions (P<0.05). Minimally invasive tonsil surgery was a safe and effective method for treating OSAHS in children.

Humans , Male , Female , Child, Preschool , Child , Ablation Techniques/methods , Palatine Tonsil/surgery , Sleep Apnea, Obstructive/surgery , Ablation Techniques/instrumentation , Adenoids/pathology , Adenoids/surgery , Hypertrophy/surgery , Minimally Invasive Surgical Procedures/methods , Palatine Tonsil/pathology , Polysomnography , Reproducibility of Results , Severity of Illness Index , Statistics, Nonparametric , Treatment Outcome
Gut and Liver ; : 784-790, 2015.
Article in English | WPRIM | ID: wpr-67325


BACKGROUND/AIMS: We experimented with different ablation methods and two types of microwave antennas to determine whether microwave ablation (MWA) increases intrahepatic pressure and to identify an MWA protocol that avoids increasing intrahepatic pressure. METHODS: MWA was performed using either a single-step standard ablation or a stepwise increment ablation paired with either a 16-gauge (G) 2-cm antenna or a 14G 4-cm antenna. We compared the maximum pressures and total ablation volumes. RESULTS: The mean maximum intrahepatic pressures and ablation volumes were as follows: 16G single-step: 37+/-33.4 mm Hg and 4.63 cm3; 16G multistep: 31+/-18.7 mm Hg and 3.75 cm3; 14G single-step: 114+/-45.4 mm Hg and 15.33 cm3; and 14G multistep: 106+/-43.8 mm Hg and 10.98 cm3. The intrahepatic pressure rose during MWA, but there were no statistically significant differences between the single and multistep methods when the same gauge antennae were used. The total ablation volume was different only in the 14G groups (p<0.05). CONCLUSIONS: We demonstrated an increase in intrahepatic pressure during MWA. The multistep method may be used to prevent increased intrahepatic pressure after applying the proper power.

Animals , Cattle , Ablation Techniques/instrumentation , Liver/physiology , Medical Illustration , Microwaves , Models, Animal , Pressure