Molecular viral epidemiology and clinical characterization of acute febrile respiratory infections in hospitalized children in Taiwan.

Acute respiratory infection (ARI) is a leading cause of morbidity and hospitalization in children. To profile the viruses causing ARI in children admitted to a community-based hospital in central Taiwan, a cross-sectional study was conducted on children under 14 years of age that were hospitalized with febrile ARI. Viral etiology was determined using conventional cell culture and a commercial respiratory virus panel fast assay (xTAG RVP), capable of detecting 19 different respiratory viruses and subtype targets. Demographic, clinical, and laboratory data were recorded and analyzed. The RVP fast assay identified at least one respiratory virus in 130 of the 216 specimens examined (60.2%) and rose to 137 (63.4%) by combining the results of cell culture and RVP fast assay. In order of frequency, the etiological agents identified were, rhinovirus/enterovirus (24.6%), respiratory syncytial virus (13.8%), adenovirus (11.5%), parainfluenza virus (9.2%), influenza B (8.4%), influenza A (5.4%), human metapneumovirus (4.6%), human coronavirus (2%), and human bocavirus (2%). Co-infection did not result in an increase in clinical severity. The RVP assay detected more positive specimens, but failed to detect 6 viruses identified by culture. The viral detection rate for the RVP assay was affected by how many days after admission the samples were taken (P = 0.03). In conclusion, Rhinovirus/enterovirus, respiratory syncytial virus, and adenovirus were prevalent in this study by adopting RVP assay. The viral detection rate is influenced by sampling time, especially if the tests are performed during the first three days of hospitalization.

Design and application of a real-time polymerase chain for the detection and subsequent characterization of respiratory adenoviral infections.

Human adenoviruses (HADVs) comprise at least 54 types and cause a wide spectrum of respiratory tract infections; early diagnosis and epidemiological monitoring of HADV infections requires a rapid and sensitive assay. The use of a real-time polymerase chain reaction (PCR) assay was evaluated with one set of in-house designed primers for respiratory adenoviral infections. The assay was first validated by detecting successfully 6 representative types and 100 clinical isolates. A concomitant prospective surveillance of viral aetiology using conventional cultures and PCR assays in 160 febrile children with acute respiratory tract symptoms was conducted between May 2010 and July 2011. Viral aetiologies were confirmed in 72 (45%) cases using conventional cultures, including 51 adenoviral infections. The concordance between the real-time PCR and culture was good (Kappa = 0.94), and two additional culture-negative adenovirus infections were identified. During the study period (January 2011), an adenoviral community epidemic occurred. Adenovirus B3 was the predominant type in this epidemic (69.8%), followed by C2 (5.7%), C1 (5.7%), C5 (1.9%), E4 (1.9%), C6 (1.9%), F41 (1.9%), and 4 unclassified species C (7.5%). Significantly prolonged duration of fever (>5 days), higher leukocyte counts, higher neutrophil counts, and higher C-reactive protein levels were in the adenoviral infected group (n = 53, P < 0.001), compared with the non-adenoviral infected group (n = 107). In conclusion, this in-house real-time PCR is capable of detecting adenoviral respiratory infections of various types in children; and patients with adenoviral aetiology suffered from more severe clinical manifestations.

Smartphone applications (apps) for heart rate measurement in children: comparison with electrocardiography monitor.

Heart rate (HR) measurement is essential for children with abnormal heart beats. The purpose of this study was to determine whether HR measurement by smartphone applications (apps) could be a feasible alternative to an electrocardiography (ECG) monitor. A total of 40 children, median age of 4.3 years, were studied. Using four free smartphone apps, pulse rates were measured at the finger (or toe) and earlobe, and compared with baseline HRs measured by ECG monitors. Significant correlations between measured pulse rates and baseline HRs were found. Both correlation and accuracy rate were higher in the earlobe group than the finger/toe group. When HR was <120 beats per min (bpm), the accuracy rates were not different between the two different measuring sites for each app (median of 65 vs 76%). The accuracy rates in the finger/toe group were significantly lower than those in the earlobe group for all apps when HR was ≥ 120 bpm (27 vs 65%). There were differences among apps in their abilities to measure pulse rates. Taking children's pulse rate from the earlobe would be more accurate, especially for tachycardia. However, we do not recommend that smartphone apps should not be used for routine medical use or used as the sole form of HR measurement because the results of their accuracy are not good enough.

Transcatheter therapy of Lutembacher syndrome.

Lutembacher syndrome is a combination of congenital atrial septal defect (ASD) and acquired mitral stenosis (MS). The combination of these 2 diseases has hemodynamic influences on each other and the degree of MS may be underestimated. Traditionally, Lutembacher syndrome is corrected by surgical treatment. Nowadays, these 2 diseases are amenable to transcatheter treatment without the need for surgery. Here, we describe a 28-year-old female with Lutembacher syndrome who benefited from combined transcatheter therapy of balloon valvuloplasty for MS and device closure for ASD with an Amplatzer septal occluder.

Transcatheter therapy of Budd-Chiari syndrome in a child after liver transplantation: report of one case.

Budd-Chiari syndrome is a rare, heterogenous and potentially lethal condition due to hepatic venous outflow obstruction. Classic triads include hepatomegaly, ascites and abdominal pain. Most cases are caused by abnormal coagulopathy, infection, inflammation or tumor invasion. Status post liver transplantation was rarely mentioned in the pediatric group. Here we report a case of 4-year-old girl with biliary atresia status post living donor liver transplantation. Marked ascites developed 2 months later and Budd-Chiari syndrome was diagnosed. Cardiac catheterization showed significant stenoses of the hepatic vein and inferior vena cava. Initial balloon angioplasty of inferior vena cava only resulted in mild improvement. After successful balloon angioplasty of the hepatic vein stenosis, the stenosis of the inferior vena cava improved significantly. The ascites resolved soon, and no more happened up to 8 months' follow-up.

Combined transcatheter closure of atrial septal defect and patent ductus arteriosus: report of two cases.

Atrial septal defect (ASD) and patent ductus arteriosus (PDA) are common congenital heart defects and usually isolate. The combination of these two defects is infrequent. Nowadays, both defects are amenable to transcatheter closure, without surgery. However, both defects by transcather closure was rarely reported. Here we report that two children with ASD and PDA benefited from combined interventional therapy using the Amplatzer septal occluder for the ASD and Gianturco coils for the PDA. Based on our limited experience, closing the PDA before the ASD may be a better option.

Early Immunoglobulin Therapy and Outcomes in Kawasaki Disease: A Nationwide Cohort Study.

Kawasaki disease is the leading cause of acquired heart disease among children in most industrialized countries; however, only few descriptive studies have discussed the pros and cons of early immunoglobulin therapy. This study aimed to see the effect of early immunoglobulin therapy on Kawasaki disease outcomes. Patients who received immunoglobulin therapy for the first time were enrolled. Basic data were analyzed for descriptive epidemiology. If there was no prescription of antipyretics 4 to 12 days before admission, those patients were regarded as early immunoglobulin therapy group. The risk for acute aneurysm, requiring long-term anticoagulant therapy and recurrence rate were compared. Of 5235 patients with first attack of Kawasaki disease, 1156 received early immunoglobulin therapy. The odds ratios for acute aneurysm and needing long-term anticoagulant therapy were 0.99 (95% confidence interval [CI], 0.75-1.29) and 1.06 (95% CI, 0.86-1.31), respectively. The recurrence rate was higher for the early immunoglobulin therapy group, with an adjusted hazard ratio of 1.38 (95% CI, 1.29-1.47). Early immunoglobulin therapy might not be beneficial for the coronary outcomes of children with Kawasaki disease in this observational study. On the contrary, it might be associated with higher recurrence rate. A randomized controlled study comparing early and late intravenous immunoglobulin therapy would have probably brought relevant results.

Seroprevalence of Helicobacter pylori and Hepatitis A Virus among Children in Rural Central Taiwan.

Helicobacter pylori and hepatitis A virus (HAV) are thought to have similar routes of transmission and epidemiology. This study investigated the seroprevalence of these 2 pathogens among children in rural, central Taiwan. Serum samples were collected from 856 children between 2010 and 2012 and levels of anti-HAV and anti-H. pylori antibodies were measured by ELISA. Questionnaires were used to investigate possible risk factors. The overall H. pylori and HAV infection rates were 6% and 0.8%, respectively. There was a significant difference in H. pylori infection rates (P value=0.008), but not HAV infection rates, between different age groups. H. pylori infection rates were significantly higher in children whose mothers had lower education levels. In contrast, HAV infection rates were significantly higher in children whose fathers had lower education levels. The risk of HAV infection was also 14.20-fold higher in children whose family members had traveled to China or Southeast Asia. No significant correlation was found between H. pylori and HAV seropositivity. The seroprevalences of H. pylori and HAV were low in rural central Taiwan. Universal HAV vaccination is highly recommended to prevent outbreak due to low seroprevalence.

Anomalous connection of the right pulmonary vein to the coronary sinus in a young infant.

Partial anomalous pulmonary venous connection (PAPVC) is a rare congenital heart disease. Among previous cases, anomalous connection of the right pulmonary vein (RPV) to the coronary sinus (CS) was seldom reported. Here, we report an 8-month-old girl, initially presenting with congestive heart failure, who had this rare anomaly with moderate-sized secundum atrial septal defect (ASD). After confirmation by multi-detector row computed tomography (MDCT) and cardiac catheterization, the infant underwent a successful surgical repair. To our knowledge, this is the first reported infant with this kind of rare anomaly.

Stretched size of atrial septal defect predicted by intracardiac echocardiography.

The stretched size of an atrial septal defect (ASD) is important for device selection during transcatheter closure. However, balloon sizing carries potential risks such as hypotension, bradycardia, or laceration of the atrial septum. The aim of the present study was to investigate the accuracy of the predicted stretched size of ASD by intracardiac echocardiography (ICE). From December 2004 to November 2007, 136 consecutive patients with single secundum type ASD undergoing transcatheter closure of their defect using the Amplatzer septal occluder under ICE guidance were enrolled for analysis. There were 43 males and 93 females. The age ranged from 2.2 to 79.1 years with a median age of 13.4 years. The body weight ranged from 12.1 to 93.2 kg with a median body weight of 45.8 kg. The stretched size of ASD measured by a sizing plate was considered as the standard. ASD sizes measured by ICE in bicaval and short-axis views predicted the stretched size by formulae derived from linear regressions. The predicted stretched sizes obtained using 2 formulae, 1.34 x radicalbicaval xshort axis (formula 1) and 1.22 x larger diameter (formula 2), exhibited good agreement with the standard stretched size with Kappa values of 0.91 and 0.90, respectively. The accuracy rate of predicted stretched sizes within 2 mm, 3 mm, and 4 mm range of the standard size were 32.8%, 45.4%, and 57.7% (formula 1) and 33.1%, 50%, and 63.2% (formula 2). The stretched size of ASD predicted by ICE exhibited good agreement with the standard stretched size. This prediction provides helpful information, especially if balloon sizing cannot be adequately performed.

A follow-up study of neonatal interatrial shunt with echocardiography until twelve to fifteen months of age.

OBJECTIVES: To assess the incidence and natural history of full-term neonates with interatrial shunt (IAS). METHODS: A follow-up study of 1389 neonates who received screening echocardiography between 2003 and 2006. Babies with IAS at 2 to 4 days of life underwent follow-up echocardiography at 2 to 4 months, 6 to 9 months and 12 to 15 months of age until closure of IAS. RESULTS: The ratio of IAS was 68.3% initially. No significant demographic differences were identified between infants with and without initial IAS. Among 949 neonates with initial IAS, 84.5% infants had a left-to-right interatrial shunt, 13.5% had bidirectional shunt and 2% had predominantly right-to-left shunt. The persistence rate of IAS at 12 to 15 months of age was 3.8% (44/1166). The initial size of IAS ranged from 1.2 to 7.7mm (4.3+/-1.1 mm) detected by color Doppler flow mapping and cases were divided into three groups: small (< or =5 mm), medium (5 to 8 mm) and large group (> or =8 mm). There were 74.6% infants in the small group and 25.4% in the medium group initially. The neonates in the initial small group would always see their IAS close or else they would remain in the small group. Those in the final medium and large size groups always came from the initial medium group. The late closure rate of IAS was 93.9% of infants with initial IAS. The closure curves of initial small and medium sized groups were significantly different, and their late closure rates were 95.1% and 90.4%, respectively. CONCLUSIONS: IAS was very common during early neonatal stage, but most cases would close after 1 year. The late closure rate of initial IAS was different if using a cutpoint of 5 mm.

Dislodgment of port-a-cath catheters in children.

BACKGROUND: Port-a-cath catheters are frequently used in children with malignancies. Their dislodgment is rare, but carries potentially serious risks. This study analyzed our 11-year experience of this important issue. METHODS: Between June 1997 and January 2008, 290 ports of different brands were implanted in children by pediatric surgeons. Among the patients, 12 children with catheter dislodgement were retrospectively studied. Their ages ranged from 2-16 years, with a median of 6.4 years. Their body weights ranged from 12-39 kg, with a median of 20 kg. Ten patients presented with a port-a-cath dysfunction, while the other two patients were identified incidentally during surgery for removal of their ports. RESULTS: The downstream ends of dislodged catheters were located in the right ventricle (five patients), right atrium (four), main pulmonary artery (one), left pulmonary artery (one) and right pulmonary artery (one). Eleven catheters were broken, and one catheter was disconnected from the port. Most (10/11) catheters were broken at the site of anastomosis to the port. All dislodged catheters were successfully retrieved without complications by transcatheter retrieval using a gooseneck snare. CONCLUSION: The dislodgment rate of port-a-cath catheters in children in our series was 4.1%. Most (83%) catheters were broken at the site of anastomosis to the port. All dislodged catheters could be successfully retrieved by transcatheter retrieval using a gooseneck snare.