PURPOSE: We aimed to determine characteristics of host, causative organisms, and antibiotic susceptibility of bacteria in pediatric patients with UTI living in metropolitan area of Korea. METHODS: Retrospective investigation was done for the causative organisms of UTI in 683 pediatric cases treated at Ajou University Hospital from 2012 to 2017. Patients were classified into Escherichia coli and non-E.coli group, where E.coli group was subdivided into ESBL(+) and ESBL(−) groups based on whether the bacteria could produce extended spectrum beta-lactamase (ESBL). Antibiotic susceptibility of the causative organism was also determined. RESULTS: A total of 683 UTIs occurred in 550 patients, of which 463 (67.8%) were first-time infection and 87 (32.2%) were recurrent ones (2–7 recurrences, 2.52 average), and 64.9% were male and 35.1% were female. The most common causative organism was E.coli (77.2%) and ESBL(+) E.coli was found in 126 cases. The susceptibility of E.coli to 3rd or 4th generation cephalosporin was relatively higher than that to ampicillin or amoxicillin/clavulanic acid. ESBL(+) E.coli showed higher resistance rate to 3rd or 4th generation cephalosporin than ESBL(−) E.coli . CONCLUSION: New treatment guideline should be considered due to the incidence of ESBL(+) E.coli increased up to one quarter of UTI cases.
Ampicillin ; Bacteria ; beta-Lactamases ; Child ; Drug Resistance, Microbial ; Epidemiologic Studies ; Escherichia coli ; Female ; Humans ; Incidence ; Korea ; Male ; Recurrence ; Retrospective Studies ; Urinary Tract Infections ; Urinary Tract

BACKGROUND: Langerhans cell histiocytosis (LCH) frequently involves the head and neck and increases the risk of central nervous system (CNS) involvement of LCH, such as central diabetes insipidus (CDI), when the craniofacial bones are involved. We analyzed risk factors and clinical features of CDI among patients with LCH involving the head and neck. METHODS: From January 1, 2000 to May 1, 2018, 63 patients with histologically confirmed LCH in the Department of Pediatrics, Ajou University Hospital were retrospectively analyzed. RESULTS: Forty eight cases (76.2%) of patients had head and neck involvement, and 9 cases (14.3%) in craniofacial bones at the time of initial diagnosis of LCH. CDI was found in 6 cases (9.5%) among all LCH patients, 6 cases (12.2%) among patients with head and neck involvement, and 3 cases (33.3%) among patients with craniofacial bone involvement. Three cases of CDI occurred at the time of initial LCH diagnosis, and another 3 cases occurred at the time of 2, 4, and 8 years after initial LCH diagnosis. Of the 6 CDI patients, 3 had CNS risk lesions and 3 had no CNS risk lesions, but all had multi-system involvement of LCH. CONCLUSION: CDI can occur even in patients with head and neck LCH without CNS risk lesions, if there are multisystem involvement of LCH. Patients with head and neck LCH may develop CDI over time, so continuous observations should be done while considering the occurrence of CDI.
Central Nervous System ; Diabetes Insipidus, Neurogenic* ; Diagnosis ; Head* ; Histiocytosis, Langerhans-Cell* ; Humans ; Neck* ; Pediatrics ; Retrospective Studies ; Risk Factors

PURPOSE: This study investigated the incidence of adverse events (AEs) and risk factors associated with sedation using chloral hydrate (CH) for brain magnetic resonance imaging (MRI) in the neonatal intensive care unit (NICU). METHODS: This was a retrospective study of infants who received CH for brain MRI in the NICU. Among the enrolled infants (n=143), 12.6% (n=18) were included in the AE group and 87.4% (n=125) were in the non-adverse event group (NAE). RESULTS: Gestational age (GA) at birth and corrected GA at sedation were 35+0±7+2 and 39+5±3+1 respectively. The rate of AEs was 12.6%, included oxygen desaturation (5.6%), aspiration (4.9%), paradoxical agitation (0.7%), tachycardia or bradycardia (0.7%), and arrest (0.7%). In univariate analysis, the AE group was younger in corrected GA at sedation than the NAE group (37+2 [range, 36+0 to 40+0] vs. 40+1 [range, 38+2 to 41+4], P=0.015). There was no significant difference in CH dosage (50.0 [range, 50.0 to 50.0] vs. 50.0 [range, 50.0 to 50.0], P=0.092), cardiopulmonary (33.3% [n=6] vs. 17.6% [n= 22], P=0.209) and central nervous system (61.1% [n=11] vs. 65.6% [n=82], P=0.054) morbidity. In multivariate analysis, CH dosage was the only significant risk factor for AEs associated with sedation (odds ratio, 1.04; 95% confidence interval, 1.01 to 1.07; P=0.0186). CONCLUSION: AEs associated with sedation using CH are not uncommon and should be considered when using high dose CH for diagnostic testing in the NICU.
Bradycardia ; Brain ; Central Nervous System ; Chloral Hydrate ; Diagnostic Tests, Routine ; Dihydroergotamine ; Gestational Age ; Humans ; Incidence ; Infant ; Infant, Newborn ; Intensive Care, Neonatal ; Magnetic Resonance Imaging ; Multivariate Analysis ; Oxygen ; Parturition ; Retrospective Studies ; Risk Factors ; Tachycardia

Purpose: Magnetic resonance imaging (MRI) is a useful tool for evaluating brain injury and maturation in preterm infants and often requires sedation to acquire images of sufficient quality. Infant sedation is often associated with adverse events, despite extreme precautions. In this study, the swaddling technique was investigated as an alternative non-pharmacological strategy to obtain brain MRIs of sufficient quality. Methods: We applied the feed and swaddle technique during routine brain MRI as a quality improvement project and compared its morbidity with that of sedation in a historic age-matched group. Seventy-nine very low birth weight infants in the neonatal intensive care unit of Ajou University Hospital (Suwon, Korea) were enrolled. Thirty-two (40.5%) infants were in the feed and swaddling group, and 47 (59.5%) were in the sedation group. Results: The morbidity associated with the cardiopulmonary system (swaddling group vs. sedation group: 53.13% [n=17] vs. 63.83% [n=30], P=0.723) and central nervous system (40.63% [n=13] vs. 29.79% [n=14], P=0.217) were not significantly different between groups. The MRI failure rate was not significantly different (swaddling group vs. sedation group: 12.5% [n=4] vs. 4.3% [n=2], P=0.174). The MRI scanning time was longer in the swaddling group than in the sedation group (76.5±20.3 minutes vs. 61.5±13.6 minutes, P=0.001). Cardiopulmonary adverse events were significantly less common in the swaddling group than in the sedation group (3.13% [n=1] vs. 34.04% [n=16], P=0.002). Conclusion The success rate of MRI was comparable between the swaddling technique and sedation. Furthermore, despite the drawback of prolonged scan time, cardiopulmonary adverse events are fewer with swaddling than with sedative agents. Therefore, swaddling can be an alternative to sedation or anesthesia when performing neonatal MRI scans.

Purpose: Magnetic resonance imaging (MRI) is a useful tool for evaluating brain injury and maturation in preterm infants and often requires sedation to acquire images of sufficient quality. Infant sedation is often associated with adverse events, despite extreme precautions. In this study, the swaddling technique was investigated as an alternative non-pharmacological strategy to obtain brain MRIs of sufficient quality. Methods: We applied the feed and swaddle technique during routine brain MRI as a quality improvement project and compared its morbidity with that of sedation in a historic age-matched group. Seventy-nine very low birth weight infants in the neonatal intensive care unit of Ajou University Hospital (Suwon, Korea) were enrolled. Thirty-two (40.5%) infants were in the feed and swaddling group, and 47 (59.5%) were in the sedation group. Results: The morbidity associated with the cardiopulmonary system (swaddling group vs. sedation group: 53.13% [n=17] vs. 63.83% [n=30], P=0.723) and central nervous system (40.63% [n=13] vs. 29.79% [n=14], P=0.217) were not significantly different between groups. The MRI failure rate was not significantly different (swaddling group vs. sedation group: 12.5% [n=4] vs. 4.3% [n=2], P=0.174). The MRI scanning time was longer in the swaddling group than in the sedation group (76.5±20.3 minutes vs. 61.5±13.6 minutes, P=0.001). Cardiopulmonary adverse events were significantly less common in the swaddling group than in the sedation group (3.13% [n=1] vs. 34.04% [n=16], P=0.002). Conclusion The success rate of MRI was comparable between the swaddling technique and sedation. Furthermore, despite the drawback of prolonged scan time, cardiopulmonary adverse events are fewer with swaddling than with sedative agents. Therefore, swaddling can be an alternative to sedation or anesthesia when performing neonatal MRI scans.

In the previous experiments, we reported that ethanol extract of Gastrodiae Rhizoma, the dried tuber of Gastrodia ElataBlume (Orchidaceae) increased pentobarbital-induced sleeping behaviors. These experiments were undertaken to know whether 4-hydroxybenzaldehyde (4-HBD), is one of the major compounds of Gastrodiae Rhizoma increases pentobarbital-induced sleeping behaviors and changes sleep architectures via activating GABA(A)-ergic systems in rodents. 4-HBD decreased locomotor activity in mice. 4-HBD increased total sleep time, and decreased of sleep onset by pentobarbital (28 mg/kg and 40 mg/kg). 4-HBD showed synergistic effects with muscimol (a GABA(A) receptor agonist), shortening sleep onset and enhancing sleep time on pentobarbital-induced sleeping behaviors. On the other hand, 4-HBD (200 mg/kg, p.o.) itself significantly inhibited the counts of sleep-wake cycles, and prolonged total sleep time and non-rapid eye movement (NREM) in rats. Moreover, 4-HBD increased intracellular Cl- levels in the primary cultured cerebellar cells. The protein levels of glutamic acid decarboxylase (GAD) and GABA(A) receptors subunits were over-expressed by 4-HBD. Consequently, these results demonstrate that 4-HBD increased NREM sleep as well as sleeping behaviors via the activation of GABA(A)-ergic systems in rodents.
Animals ; Ethanol ; Eye Movements* ; Gastrodia* ; Glutamate Decarboxylase ; Hand ; Mice ; Motor Activity ; Muscimol ; Pentobarbital ; Rats ; Receptors, GABA-A ; Rodentia*

BACKGROUND AND OBJECTIVES: Cancer cell line is the basic material of various cancer research. Diverse cancer cell lines from various head and neck regions are needed for biologic research of head and neck cancer. However, cell lines derived from head and neck cancer are not common. Recently, we have established and characterized a novel human squamous carcinoma cell line, PNUH-12, from the hypopharynx. MATERIALS AND METHODS:Among trials of twenty cases of head and neck cancer, we established only one specimen succeeded culture passage over 50. We characterized the cell line as follows: growth pattern and curve, morphology using phase contrast microscope and transmission electromicroscope, chromosomal anaysis, flow cytometric analysis, tumorigenecity by xenograft of cell line into nude mouse and morphological comparison, expression of cytokeratin, epithelial membrane antigen and vimentin, and P 53 mutation and its sequencing. RESULTS: PNUH-12 showed typical growth pattern of cancer cell line, representative morphological characteristics of squamous epithelial cell origin, multiple numerical and structural clonal abnormalities of chromosome, aneuploidy pattern of flow cytometry, and strong expression of cytokeratin. The formed tumor of nude mouse showed the identical histopathological phenotype (squamous cell carcinoma) of the original tumor of patient and similar morphology of PNUH-12. There was one point mutation of 78th base, C to G, in exon 7 of P53 gene. CONCLUSION: PNUH-12 can be a good control material and successufully bestowed to researchers for study of biology in head and neck cancer. There still needed more head and neck cancer cell lines from various regions and diverse cell types in future.
Aneuploidy ; Animals ; Biology ; Carcinoma, Squamous Cell* ; Cell Line* ; Epithelial Cells ; Exons ; Flow Cytometry ; Genes, p53 ; Head ; Head and Neck Neoplasms ; Heterografts ; Humans* ; Hypopharynx* ; Keratins ; Mice ; Mice, Nude ; Mucin-1 ; Neck ; Phenotype ; Point Mutation ; Vimentin