Purpose: To compare the efficacy of the gas-tank method with that of the disposable-gas method in delivering intraocular perfluoropropane (C3F8) tamponade during vitrectomy. Methods: This retrospective study included patients who underwent vitrectomy with C3F8 gas tamponade for retinal detachment between January 2014 and November 2023. In total, 152 patients were categorized into the gas-tank (47 patients) and disposable- gas (105 patients) groups. It was assumed that the gas reached its maximum intraocular volume at 72 h post-injection. The half-life and residual duration of the gas were calculated based on the assumption that the logit-transformed gas volume followed a linear decay. These parameters, along with intraocular pressure (IOP) measurements at postoperative day 1, day 3, week 1, month 1, and month 2, were compared between the two groups. Results: The mean half-life of C3F8 gas was significantly longer in the disposable-gas group (29.10 days) compared to the gas-tank group (25.68 days) (p = 0.000). The residual duration of the gas was also significantly longer in the disposable-gas group (55.34 days, p = 0.000). Furthermore, the variance in half-life was notably smaller in the disposable-gas group (17.80) than in the gas-tank group (34.74), indicating greater consistency. No statistically significant differences in IOP were observed between the two groups at any postoperative time point. Conclusions Vitrectomy using disposable C3F8 gas for retinal detachment is an effective surgical technique that provides consistent and accurate intraocular gas concentrations.

Female ; Forced Expiratory Volume ; Humans ; Linear Models ; Lung ; Male ; Radiography, Thoracic ; Spirometry ; Vital Capacity

PURPOSE: Severe cutaneous adverse reactions (SCARs), including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and drug reaction with eosinophilia and systemic symptoms (DRESS) to antiepileptic drug (AED), are rare, but result in significant morbidity and mortality. We investigated the major culprit drugs, clinical characteristics, and clinical course and outcomes of AED-induced SCARs using a nationwide registry in Korea. METHODS: A total of 161 patients with AED-induced SCARs from 28 referral hospitals were analyzed. The causative AEDs, clinical characteristics, organ involvements, details of treatment, and outcomes were evaluated. We compared the clinical and laboratory parameters between SJS/TEN and DRESS according to the leading causative drugs. We further determined risk factors for prolonged hospitalization in AED-induced SCARs. RESULTS: Carbamazepine and lamotrigine were the most common culprit drugs causing SCARs. Valproic acid and levetiracetam also emerged as the major causative agents. The disease duration and hospital stay in carbamazepine-induced SJS/TEN were shorter than those in other AEDs (P< 0.05, respectively). In younger patients, lamotrigine caused higher incidences of DRESS than other drugs (P= 0.045). Carbamazepine, the most common culprit drug for SCARs, was associated with a favorable outcome related with prolonged hospitalization in SJS (odds ratio, 0.12; 95% confidence interval, 0.02-0.63, P= 0.12), and thrombocytopenia was found to be a risk factor for prolonged hospitalization in DRESS. CONCLUSION: This was the first large-scale epidemiological study of AED-induced SCARs in Korea. Valproic acid and levetiracetam were the significant emerging AEDs causing SCARs in addition to the well-known offending AEDs such as carbamazepine and lamotrigine. Carbamazepine was associated with reduced hospitalization, but thrombocytopenia was a risk factor for prolonged hospitalization. Our results suggest that the clinical characteristics and clinical courses of AED-induced SCARs might vary according to the individual AEDs.
Anticonvulsants ; Carbamazepine ; Cicatrix ; Drug Hypersensitivity Syndrome ; Epidemiologic Studies ; Hospitalization ; Humans ; Incidence ; Korea ; Length of Stay ; Mortality ; Referral and Consultation ; Risk Factors ; Stevens-Johnson Syndrome ; Thrombocytopenia ; Valproic Acid

OBJECTIVE: To investigate the differences in hyolaryngeal kinematics at rest and during swallowing in the upright sitting (UP) and the lateral decubitus (LD) postures in healthy adults, and delineating any potential advantages of swallowing while in the LD posture. METHODS: Swallowing was videofluoroscopically evaluated in 20 healthy volunteers in UP and LD postures, based on the movements of hyoid bone, vocal folds, and the bolus head. Parameters included the Penetration-Aspiration Scale (PAS), horizontal and vertical displacement, horizontal and vertical initial position, horizontal and vertical peak position, time to peak position of the hyoid bone and vocal folds, and pharyngeal transit time (PTT). RESULTS: Nine participants were rated PAS 2 in the UP and 1 was rated PAS 2 in the LD (p=0.003) at least 1 out of 3 swallows each posture. The hyoid and vocal folds showed more anterior and superior peak and initial positions in the LD. In addition, swallowing resulted in greater vertical and smaller horizontal displacement of the hyoid in LD posture compared with UP. Time to peak position of the hyoid was shorter in LD. The maximal vertical and horizontal displacement of the vocal folds, and PTT were comparable between postures. CONCLUSION: The results showed that the peak and initial positions of the hyoid and larynx and the pattern of hyoid movement varied significantly depending on the body postures. This study suggests that the LD posture was one of the safe feeding postures without any increased risk compared with UP posture.
Adult ; Biomechanical Phenomena ; Deglutition Disorders ; Deglutition* ; Head ; Healthy Volunteers ; Humans ; Hyoid Bone ; Larynx ; Posture* ; Swallows ; Vocal Cords

OBJECTIVE: To investigate the magnetic resonance imaging (MRI) findings and the patterns of postoperative spinal infection according to the passage of time. METHODS: Institutional review board approval was obtained, and informed consent was not obtained for the retrospective review of patients’ medical records. A total of 43 patients (27 men and 16 women; mean age, 64) diagnosed with postoperative spinal infection were included in this study. We retrospectively reviewed the MRI findings and the medical records and categorized the infection sites based on MRI, i.e., anterior, posterior, and both parts. The duration of the clinical onset from surgery was divided, i.e., acute (≤2 weeks), subacute (2–4 weeks), and late (>4 weeks). RESULTS: Postoperative spinal infection was involved in the posterior part in 31 (72%), anterior part in two (4.7%), and both parts in 10 patients (23.3%). Abscess or phlegmon in the back muscles and laminectomy site were the most common MRI findings. The number of patients with acute, subacute, and late clinical onset were 35, two, and six, respectively (mean, 33.4 days; range, 1–730 days). The mean duration of the clinical onset was 12 days in the posterior part, 15.2 days in both parts, and 456.5 days in the anterior part. CONCLUSION: Postoperative spinal infection usually occurred within four weeks in the posterior part and over time the infection was considered to spread into the anterior part. For the evaluation of postoperative spinal infection, the posterior surgical field was more important than the vertebral body or the disc space on MRI.
Abscess ; Back Muscles ; Cellulitis ; Discitis ; Ethics Committees, Research ; Female ; Humans ; Informed Consent ; Laminectomy ; Magnetic Resonance Imaging* ; Male ; Medical Records ; Retrospective Studies ; Spine ; Spondylitis

Artificial pancreas is a technique developed to automatically control blood glucose in people with diabetes by providing an endocrine function instead of a healthy pancreas. The technique was developed for the replacement of insulin secretion deficiencies among various exocrine and endocrine functions of the pancreas and is mainly used for people with type 1 diabetes or those who need intensive insulin treatment. This review briefly summarizes the working principles, components, recent clinical research, and future perspectives of artificial pancreas.
Blood Glucose ; Diabetes Mellitus ; Extracellular Fluid ; Glucose ; Insulin ; Pancreas ; Pancreas, Artificial*

PURPOSE: The aim of this study was to evaluate changes in expressions of neuregulin (NRG)1 and erbB2 tyrosine kinase (ErbB2) in bladders of rats with cyclophosphamide (CYP)-induced interstitial cystitis (IC). METHODS: Twenty-four Sprague-Dawley rats were divided into the IC group (n=16) and the control group (n=8). After inducing IC with intraperitoneal CYP injection, expressions of NRG1 and ErbB2 were analyzed using western blotting and reverse transcriptase-polymerase chain reaction. RESULTS: In Western blotting, relative intensities and distributions of both NRG1 and ErbB2 were approximately 1.5- and 3.2-fold higher, respectively, in the IC group than in the control group (mean+/-standard deviation: 1.42+/-0.09 vs. 0.93+/-0.15 and 0.93+/-0.16 vs. 0.29+/-0.08, P<0.05). In the rat bladder samples, mRNA expression levels of NRG1 and ErbB2 were higher in the IC group than in the control group (P<0.05). CONCLUSIONS: Our study has demonstrated significant changes in mRNA expression and immunoreactivity of NRG1 and ErbB2 receptors in the urinary bladder after CYP-induced IC. These results suggest that the up-regulated NRG1 may play a role in inducing an overactive bladder and promoting regeneration in the inflammatory bladder with CYP-induced IC.
Animals ; Blotting, Western ; Cyclophosphamide ; Cystitis, Interstitial* ; Neuregulin-1* ; Protein-Tyrosine Kinases* ; Rats* ; Rats, Sprague-Dawley ; Receptor, erbB-2 ; Regeneration ; RNA, Messenger ; Tyrosine* ; Urinary Bladder* ; Urinary Bladder, Overactive

BACKGROUND/AIMS: Low-dose metronomic chemotherapy involves the frequent administration of comparatively low doses of cytotoxic agents with no extended breaks, and it may be as efficient as and less toxic than the conventional maximum tolerated dose therapy. This study evaluated the feasibility and therapeutic efficacy of metronomic chemotherapy in patients with advanced hepatocellular carcinoma (HCC) with major portal vein thrombosis (PVT). METHODS: Thirty consecutive HCC patients with major PVT with or without extrahepatic metastasis were prospectively allocated to metronomic chemotherapy consisting of epirubicin being infused through the correct hepatic artery at a dose of 30 mg/body surface area (BSA) every 4 weeks, and cisplatin (15 mg/BSA) and 5-fluorouracil (50 mg/BSA) every week for 3 weeks, with intervening 1 week breaks. The treatment response was assessed using response evaluation criteria in solid tumors (RECIST). RESULTS: In total, 116 cycles of metronomic chemotherapy were administered to the 30 patients, with a median of 3 cycles given to individual patients (range, 1-15 cycles). Six patients (20.0%) achieved a partial response and six patients (20.0%) had stable disease. The median time to disease progression and overall survival were 63 days (range, 26-631 days) and 162 days (95% confidence interval; range, 62-262 days), respectively. Overall survival was significantly associated with baseline alpha-fetoprotein level (P=0.001) and tumor response (P=0.005). The baseline alpha-fetoprotein level was significantly associated with the disease control rate (P=0.007). Adverse events were tolerable and managed successfully with conservative treatment. CONCLUSIONS: Metronomic chemotherapy may be a safe and useful palliative treatment in HCC patients with major PVT.
Administration, Metronomic ; Adult ; Aged ; Antineoplastic Agents/administration & dosage ; Carcinoma, Hepatocellular/complications/*drug therapy/mortality ; Cisplatin/administration & dosage ; Epirubicin/administration & dosage ; Female ; Fluorouracil/administration & dosage ; Humans ; Kaplan-Meier Estimate ; Liver Neoplasms/complications/*drug therapy/mortality ; Male ; Middle Aged ; *Portal Vein ; Prognosis ; Tomography, X-Ray Computed ; Venous Thrombosis/complications/*diagnosis ; alpha-Fetoproteins/analysis

The Streptococcus milleri group, which also includes S. anginosus, S. intermedius and S. constellatus, is found in the oropharynx, upper respiratory tract, gastrointestinal tract, and urogenital tract mucosa. Bacteria in the Streptococcus milleri group are associated with bacteremia and abscess formation. Most of the reports of of Streptococcus milleri group (SMG) infection occur in patients with underlying medical conditions. Predisposing factors that have been associated with S. milleri group empyema include mucosal disturbances (sinusitis, periodontal disease, enteric disease), preceding to pneumonia, thoracic surgery, malignancy, neurological disease, alcohol abuse, and also diabetes mellitus. We report on a 42-year-old man with mental retardation. He who suffered from dyspnea and a fever that he had developed for over 14 days. S. constellatus and anaerobic bacterias (Prevotella buccae and Micromonas micros) were cultured. The patient was treated with the drainage of pleural effusion and clindamycin and levofloxacin.
Abscess ; Adult ; Alcoholism ; Bacteremia ; Bacteria ; Bacteria, Anaerobic ; Cheek ; Clindamycin ; Diabetes Mellitus ; Drainage ; Dyspnea ; Empyema ; Fever ; Gastrointestinal Tract ; Humans ; Intellectual Disability ; Mucous Membrane ; Ofloxacin ; Oropharynx ; Periodontal Diseases ; Pleural Effusion ; Pneumonia ; Respiratory System ; Streptococcus ; Streptococcus constellatus ; Streptococcus milleri Group ; Thoracic Surgery

To investigate potential health risks associated with exposure to metals from an abandoned metal mine, the authors studied people living near an abandoned mine (n=102) and control groups (n=149). Levels of cadmium, copper, arsenic, lead, and zinc were measured in the air, soil, drinking water, and agricultural products. To assess individual exposure, biomarkers of each metal in blood and urine were measured. beta2-microglobulin, alpha1-microglobulin, and N-acetyl-beta-glucosaminidase and bone mineral density were measured. Surface soil in the study area showed 2-10 times higher levels of metals compared to that of the control area. Metal concentrations in the groundwater and air did not show any notable differences between groups. Mean concentrations of cadmium and copper in rice and barley from the study area were significantly higher than those of the control area (p<0.05). Geometric means of blood and urine cadmium in the study area were 2.9 microgram/L and 1.5 microgram/g Cr, respectively, significantly higher than those in the control area (p<0.05). There were no differences in the levels of urinary markers of early kidney dysfunction and bone mineral density. The authors conclude that the residents near the abandoned mine were exposed to higher levels of metals through various routes.
Aged ; Cadmium/*blood/*urine ; Copper/blood/urine ; Environmental Exposure ; *Environmental Monitoring ; Female ; *Food Contamination ; Hordeum ; Humans ; Korea ; Lead/blood/urine ; Male ; Middle Aged ; *Mining ; Oryza sativa ; Risk Factors ; Soil Pollutants/analysis ; Water Pollutants, Chemical/analysis ; Zinc/blood/urine