BACKGROUND: Heatstroke is one of the most serious heat-related illnesses. However, establishing public policies to prevent heatstroke remains a challenge. This study aimed to investigate the most relevant climate elements and their warning criteria to prevent outdoor heatstroke (OHS). METHODS: We investigated heatstroke patients from five major hospitals in Daegu metropolitan city, Korea, from June 1 to August 31, 2011 to 2016. We also collected the corresponding regional climate data from Korea Meteorological Administration. We analyzed the relationship between the climate elements and OHS occurrence by logistic regression. RESULTS: Of 70 patients who had heatstroke, 45 (64.3%) experienced it while outdoors. Considering all climate elements, only mean heat index (MHI) was related with OHS occurrence (p=0.019). Therefore, the higher the MHI, the higher the risk for OHS (adjusted odds ratio, 1.824; 95% confidence interval, 1.102–3.017). The most suitable cutoff point for MHI by Youden’s index was 30.0°C (sensitivity, 77.4%; specificity, 73.7%). CONCLUSION Among the climate elements, MHI was significantly associated with OHS occurrence. The optimal MHI cutoff point for OHS prevention was 30.0°C.

BACKGROUND: Heatstroke is one of the most serious heat-related illnesses. However, establishing public policies to prevent heatstroke remains a challenge. This study aimed to investigate the most relevant climate elements and their warning criteria to prevent outdoor heatstroke (OHS).METHODS: We investigated heatstroke patients from five major hospitals in Daegu metropolitan city, Korea, from June 1 to August 31, 2011 to 2016. We also collected the corresponding regional climate data from Korea Meteorological Administration. We analyzed the relationship between the climate elements and OHS occurrence by logistic regression.RESULTS: Of 70 patients who had heatstroke, 45 (64.3%) experienced it while outdoors. Considering all climate elements, only mean heat index (MHI) was related with OHS occurrence (p=0.019). Therefore, the higher the MHI, the higher the risk for OHS (adjusted odds ratio, 1.824; 95% confidence interval, 1.102–3.017). The most suitable cutoff point for MHI by Youden’s index was 30.0°C (sensitivity, 77.4%; specificity, 73.7%).CONCLUSION: Among the climate elements, MHI was significantly associated with OHS occurrence. The optimal MHI cutoff point for OHS prevention was 30.0°C.
Climate ; Daegu ; Heat Stroke ; Hot Temperature ; Humans ; Incidence ; Korea ; Logistic Models ; Meteorology ; Odds Ratio ; Public Policy ; Sensitivity and Specificity

BACKGROUND AND OBJECTIVES: Adenotonsillectomy is a highly effective treatment for obstructive sleep apnea symptoms in children. In this study, to investigate the effects of adenotonsillectomy on snoring in children, we analyzed and compared snoring sounds recorded using a smartphone before and after adenotonsillectomy. We also determined whether it is possible to use acoustic analysis to monitor snoring in children. SUBJECTS AND METHOD: A total of 20 children diagnosed with snoring and had undergone adenotonsillectomy performed by the same surgeon were enrolled for the study. Snoring was recorded by patients' caregivers using smartphones before and after the surgery (mean of 8.5 days) and analyzed. Questionnaires were conducted by telephone survey at 3 months and 12 months after the surgery to determine snoring status. RESULTS: Snoring completely ceased in 25% of patients and decreased in the remaining 75% during the immediate follow-up period (mean of 8.5 days; from 58.07±9.35 dB to 42.59±7.89 dB, p<0.001), and disappeared in all of the patients by 3 months after adenotonsillectomy. Snoring recurred only in one patient after 1 year. A frequency analysis offered no evident statistically significant changes during the immediate follow-up period, indicating that although snoring volume had decreased, no anatomical change had developed in the patient. Spectrography was useful in investigating the snoring patterns before and after adenotonsillectomy. CONCLUSION: The results showed that acoustic analysis of snoring sounds obtained using a smartphone may be useful for monitoring snoring during follow-up after adenotonsillectomy in pediatric snoring patients.
Acoustics* ; Caregivers ; Child* ; Follow-Up Studies ; Humans ; Methods ; Sleep Apnea, Obstructive ; Smartphone* ; Snoring* ; Telephone ; Tonsillectomy

PURPOSE: Extremely elderly patients who present with complicated gallstone disease are less likely to undergo definitive treatment. The use of laparoscopic cholecystectomy (LC) in older patients is complicated by comorbid conditions that are concomitant with advanced age and may increase postoperative complications and the frequency of conversion to open surgery. We aimed to evaluate the results of LC in patients (older than 80 years). METHODS: We retrospectively analyzed 302 patients who underwent LC for acute cholecystitis between January 2011 and December 2013. Total patients were divided into three groups: group 1 patients were younger than 65 years, group 2 patients were between 65 and 79 years, and group 3 patients were older than 80 years. Patient characteristics were compared between the different groups. RESULTS: The conversion rate was significantly higher in group 3 compared to that in the other groups. Hematoma in gallbladder fossa and intraoperative bleeding were higher in group 3, the difference was not significant. Wound infection was not different between the three groups. Operating time and postoperative hospital stay were significantly higher in group 3 compared to those in the other groups. There was no reported bile leakage and operative mortality. Preoperative percutaneous transhepatic gallbladder drainage and endoscopic retrograde cholangiopancreatography were performed more frequently in group 3 than in the other groups. CONCLUSION: LC is safe and feasible. It should be the gold-standard approach for extremely elderly patients with acute cholecystitis.
Aged* ; Bile ; Cholangiopancreatography, Endoscopic Retrograde ; Cholecystectomy, Laparoscopic* ; Cholecystitis, Acute ; Conversion to Open Surgery ; Drainage ; Gallbladder ; Gallstones ; Hematoma ; Hemorrhage ; Humans ; Length of Stay ; Mortality ; Postoperative Complications ; Retrospective Studies ; Treatment Outcome ; Wound Infection

We assessed the success rate of empirical antifungal therapy with itraconazole and evaluated risk factors for predicting the failure of empirical antifungal therapy. A multicenter, prospective, observational study was performed in patients with hematological malignancies who had neutropenic fever and received empirical antifungal therapy with itraconazole at 22 centers. A total of 391 patients who had abnormal findings on chest imaging tests (31.0%) or a positive result of enzyme immunoassay for serum galactomannan (17.6%) showed a 56.5% overall success rate. Positive galactomannan tests before the initiation of the empirical antifungal therapy (P=0.026, hazard ratio [HR], 2.28; 95% confidence interval [CI], 1.10-4.69) and abnormal findings on the chest imaging tests before initiation of the empirical antifungal therapy (P=0.022, HR, 2.03; 95% CI, 1.11-3.71) were significantly associated with poor outcomes for the empirical antifungal therapy. Eight patients (2.0%) had premature discontinuation of itraconazole therapy due to toxicity. It is suggested that positive galactomannan tests and abnormal findings on the chest imaging tests at the time of initiation of the empirical antifungal therapy are risk factors for predicting the failure of the empirical antifungal therapy with itraconazole. (Clinical Trial Registration on National Cancer Institute website, NCT01060462)
14-alpha Demethylase Inhibitors/adverse effects/therapeutic use ; Adolescent ; Adult ; Aged ; Antifungal Agents/adverse effects/*therapeutic use ; Aspergillosis/complications/*drug therapy ; Candidiasis/complications/*drug therapy ; Coccidioidomycosis/complications/drug therapy ; Febrile Neutropenia/complications/drug therapy ; Female ; Hematologic Neoplasms/complications/drug therapy/*microbiology ; Humans ; Itraconazole/adverse effects/*therapeutic use ; Male ; Mannans/blood ; Middle Aged ; Prospective Studies ; Treatment Outcome ; Young Adult

BACKGROUND: Reduction of nasal bone fracture can be performed under general or local anesthesia. The aim of this study was to compare general anesthesia (GA) and monitored anesthetic care (MAC) with dexmedetomidine based on intraoperative vital signs, comfort of patients, surgeons and nurses and the adverse effects after closed reduction of nasal bone fractures. METHODS: Sixty patients with American Society of Anesthesiologists physical status I or II were divided into a GA group (n = 30) or MAC group (n = 30). Standard monitorings were applied. In the GA group, general anesthesia was carried out with propofol-sevoflurane-N2O. In the MAC group, dexmedetomidine and local anesthetics were administered for sedation and analgesia. Intraoperative vital signs, postoperative pain scores by visual analog scale and postoperative nausea and vomiting (PONV) were compared between the groups. RESULTS: Intraoperatively, systolic blood pressures were significantly higher, and heart rates were lower in the MAC group compared to the GA group. There were no differences between the groups in the patient, nurse and surgeon's satisfaction, postoperative pain scores and incidence of PONV. CONCLUSIONS: MAC with dexmedetomidine resulted in comparable satisfaction in the patients, nurses and surgeons compared to general anesthesia. The incidence of postoperative adverse effects and severity of postoperative pain were also similar between the two groups. Therefore, both anesthetic techniques can be used during the reduction of nasal bone fractures based on a patient%s preference and medical condition.
Analgesia ; Anesthesia, General ; Anesthesia, Local ; Anesthetics, Local ; Dexmedetomidine ; Heart Rate ; Humans ; Incidence ; Nasal Bone ; Pain, Postoperative ; Postoperative Nausea and Vomiting ; Vital Signs

BACKGROUND: The aims of this study were to compare the stability, correlation with end-tidal sevoflurane, and area below the effect (AUCeffect) vs. time curves of temporal linear mode complexity (TLMC) and approximate entropy (ApEn) during sevoflurane anesthesia. Another study goal was to characterize the time course of the effects of sevoflurane. METHODS: Electroencephalogram (EEG) parame1ter stability was evaluated using the coefficients of variation (CV) of the median baseline (E0), maximal (Emax), and individual median E0 - Emax values. Correlations between sevoflurane concentration and EEG parameters were tested. AUCeffect vs. time curves of TLMC and ApEn were calculated to quantitate any decrease in central nervous system activities. A sigmoid Emax model was used for pharmacodynamic modeling. RESULTS: TLMC and ApEn demonstrated CVs of 8.36 and 7.35 (for E0) and 19.61 and 13.45 (Emax), respectively. The CVs of the individual median E0 - Emax values were 65.16 for TLMC and 59.97 for ApEn. The Spearman correlation coefficient was -0.3103 for TLMC and -0.3410 for ApEn (P < 0.001 for both parameters). The median AUCeffect value was 338.9 for TLMC and 246.5 for ApEn (P = 0.457). The final pharmacodynamic parameters estimated by sigmoid Emax models were described as follows; E0: 0.614, 0.617, Emax: 0.334, 0.287, Ce50: 5.48, 5.07 vol%, gamma: 1.88, 2.01, ke0: 0.306, 0.236 min (TLMC, ApEn). CONCLUSIONS: TLMC is comparable to ApEn according to the univariate EEG descriptors of the effects of sevoflurane. A sigmoid Emax model well described the pharmacodynamics of sevoflurane for TLMC and ApEn.
Anesthesia* ; Central Nervous System ; Colon, Sigmoid ; Electroencephalography ; Entropy ; Methyl Ethers ; Pharmacology ; Subject Headings

BACKGROUND/AIMS: The distribution of hepatitis C virus (HCV) genotypes varies geographically. In Korea, genotypes 1 and 2 comprise more than 90% of HCV infections, while genotype 6 is very rare. This study compared the clinical and epidemiological characteristics of patients with genotype 6 HCV infection with those infected with HCV genotypes 1 and 2. METHODS: This was a prospective, multicenter HCV cohort study that enrolled 1,173 adult patients, of which 930 underwent HCV genotype analysis, and only 9 (1.0%) were found to be infected with genotype 6 HCV. The clinical and epidemiological parameters of the genotypes were compared. RESULTS: The patients with genotype 6 HCV had a mean age of 41.5 years, 77.8% were male, and they had no distinct laboratory features. A sustained virologic response (SVR) was observed in four (67%) of six patients who received antiviral therapy. Risk factors such as the presence of a tattoo (n=6, 66.7%), more than three sexual partners (n=3, 33.3%), and injection drug use (n=3, 33.3%) were more common among genotype 6 patients than among genotypes 1 or 2. CONCLUSIONS: The epidemiology and treatment response of patients infected with genotype 6 HCV differed significantly from those with genotypes 1 or 2, warranting continuous monitoring.
Adult ; Antiviral Agents/therapeutic use ; Asian Continental Ancestry Group ; Cohort Studies ; Female ; Genotype ; Hepacivirus/*genetics ; Hepatitis C, Chronic/*diagnosis/drug therapy/epidemiology ; Humans ; Liver/pathology ; Male ; Middle Aged ; Prospective Studies ; RNA, Viral/blood ; Republic of Korea ; Risk Factors ; Sexual Behavior ; Substance-Related Disorders/complications ; Tattooing

In patients with severely compromised airways, a tracheostomy is usually performed under local anesthesia. Dexmedetomidine can be a better choice of sedative for such patients because it causes minimal respiratory depression. We report two cases of patients with severe stenosis of the airways who underwent sedation with dexmedetomidine during tracheostomy under local anesthesia. In the first case, recurrent laryngeal cancer caused laryngeal stenosis, and the narrowest laryngeal width was less than 3 mm. In the second case, the tracheostomy opening site was narrowed to a diameter of 3.4 mm in a patient with a history of total laryngectomy. For both patients, sedation was induced by dexmedetomidine infusion and the tracheostomy was performed successfully under local anesthesia without any events. Dexmedetomidine seems to be an effective and safe sedative for tracheostomies in patients with critical airways. The management and implications of sedation with dexmedetomidine in the patients with severe stenotic airways are discussed.
Anesthesia, Local ; Constriction, Pathologic ; Dexmedetomidine* ; Humans ; Laryngeal Neoplasms ; Laryngectomy ; Laryngostenosis ; Respiratory Insufficiency ; Tracheostomy*

BACKGROUND: Mohs micrographic surgery (MMS) is a precise method of treating skin cancer. There have been many studies about the advantages and disadvantages of MMS. However, no study has yet been carried out regarding the length of surgery. OBJECTIVE: The purpose of this study was to report our experience with MMS for the treatment of skin cancers and to analyze the operative time of MMS. METHODS: We analyzed 50 cases of skin cancers treated by MMS at the Dermatosurgery Clinic in Pusan National University Hospital between April 2009 and November 2009. RESULTS: The minimum and maximum operative times of MMS were 88 and 356 minutes, respectively, and the mean operative time was 171.4 minutes. The mean number of stages was 1.7 (range, 1~4). The mean operative time per stage was 93.9, 62.9, 57.2, and 53 minutes for the 1st, 2nd, 3rd, and 4th stages, respectively. The time percentages for a pathologic consult to the Department of Pathology per stage was 42%, 50%, 52%, and 57% for the 1st, 2nd, 3rd, and 4th stages, respectively; therefore, the consultation to the Department of Pathology occupied a high percentage of the operative time. The mean operative time of repair for surgical defects was 44.4 minutes. LIMITATIONS: The results of this study are based on the experience of a single surgical team in a single institution. CONCLUSION: The results of our study reveal that MMS is a time-consuming operation. Further studies are required to shorten the operation time of MMS.
Mohs Surgery ; Operative Time ; Skin Neoplasms