Purpose: Retroperitoneal (RP) abscess is a rare condition with poor prognosis, unclear etiology, characteristics, and treatment. This study compared transperitoneal and RP approach methods in the treatment of RP abscess. Methods: There were 45 patients with RP abscess diagnosed at Inha University Hospital from January 2014 to August 2018, of which 22 patients with 2 RP zones and systemic inflammatory response syndrome were included. Characteristics, etiology, laboratory and radiological findings, surgical technique, complications, and total number of hospital days were examined. Patients were assigned to either the transperitoneal (TP) or RP approach group. Results: There were 22 patients with RP abscess who were treated with surgical drainage using either the TP (n = 13) or RP (n = 9) approach. There was no difference in characteristics between the 2 groups. The number of reinterventions in the RP group (n = 6) was more than in the TP group (n = 4; p = 0.02). Mortality in the TP group (n = 5) was higher than in the RP group (n = 1; p < 0.01). The total mean number of hospital days in the RP group (mean: 76, range: 29-180 days) was more than in the TP group (mean: 58, range: 18-280 days, p = 0.03). Conclusion RP abscess requires rapid drainage using the TP or RP approach. Reintervention events and number of hospital days in the RP group was greater than the TP group; however, mortality in the RP group was lower than in the TP group.

Purpose: Retroperitoneal (RP) abscess is a rare condition with poor prognosis, unclear etiology, characteristics, and treatment. This study compared transperitoneal and RP approach methods in the treatment of RP abscess. Methods: There were 45 patients with RP abscess diagnosed at Inha University Hospital from January 2014 to August 2018, of which 22 patients with 2 RP zones and systemic inflammatory response syndrome were included. Characteristics, etiology, laboratory and radiological findings, surgical technique, complications, and total number of hospital days were examined. Patients were assigned to either the transperitoneal (TP) or RP approach group. Results: There were 22 patients with RP abscess who were treated with surgical drainage using either the TP (n = 13) or RP (n = 9) approach. There was no difference in characteristics between the 2 groups. The number of reinterventions in the RP group (n = 6) was more than in the TP group (n = 4; p = 0.02). Mortality in the TP group (n = 5) was higher than in the RP group (n = 1; p < 0.01). The total mean number of hospital days in the RP group (mean: 76, range: 29-180 days) was more than in the TP group (mean: 58, range: 18-280 days, p = 0.03). Conclusion RP abscess requires rapid drainage using the TP or RP approach. Reintervention events and number of hospital days in the RP group was greater than the TP group; however, mortality in the RP group was lower than in the TP group.

Background: Obesity, obstructive sleep apnea (OSA), and excessive daytime sleepiness (EDS) are common conditions and are interrelated. Obesity is a risk factor for OSA and independently associated with EDS. We aimed to evaluate frequency of EDS in morbid obese patients with OSA and to identify contribution factor for EDS. Methods: This was a retrospective cross-sectional study in single sleep center. Consecutive patients with OSA (with apnea-hypopnea index 5/h or more) with morbid obesity (body mass index over 35 kg/m2) was enrolled. EDS were defined as Epworth Sleepiness Scale of 10 points or more. Clinical and polysomnographic variables were compared between those with and without EDS. Results: Total 110 morbid obese patients with OSA were enrolled, and 34 (31%) of them had EDS. Those with EDS had higher subjective symptom of insomnia and depression. Rapid eye movement sleep latency was shorter and minimum saturation was lower for those with EDS. Multivariate logistic regression analysis identified insomnia severity (odds ratio, 1.117) and minimum saturation (odds ratio, 0.952) as independent contribution factor for EDS. Conclusions Result of this study suggest that 31.4% of morbid obese patients with OSA have EDS, and it can be affected by insomnia severity and desaturation during sleep.