The Cut-off Value of Great Saphenous Vein Diameter at the Level of Femoral Condyle to Predict the Sapheno-Femoral Junction Incompetence.

Background Varicose vein is one of the commonest problems that patients visit to a vascular out patient services (OPD). It causes a great deal of morbidity in today's population. Objective To see the correlation between the size of great saphenous and Saphenofemoral junction incompetence. Method From January 2019 till January 2020, 396 patients with symptomatic or clinically diagnosed varicose veins were screened for Saphenofemoral junction reflux. The diameter of the saphenous vein was measured with B-mode imaging, and reflux was quantified based on valve closure time using Doppler spectral measurements. Best saphenous vein diameter cutoff for predicting reflux was determined using receiver operating characteristics curve analysis. Result Out of 792 limbs, the Great Saphenous Venous System was involved in 452 limbs, the Short Saphenous Venous System was involved in 151 limbs and significant perforators were present in 240 limbs. Mean great Saphenous Vein diameter of diseased limb (Reflux Positive) was 5.68 mm and 4.0 mm in control group (Reflux Negative). Mean Saphenofemoral junction diameter was 8.23 mm in diseased limbs and 6.16 mm in control limbs. Receiver operating characteristics curve showed great saphenous vein diameter at femoral condyle of 4.5 mm as best cut-off value for diagnosis of sapheno femoral junction reflux. Conclusion Great Saphenous Vein diameter at femoral condyle of 4.5 mm is the best cut-off value for diagnosis Saphenofemoral junction reflux. The Sensitivity and specificity of this cut off value is 81.8% and 71% respectively.

Prevalence of Loss of Smell and/or Taste and other Otorhinolaryngology Symptoms in COVID-19 Patients.

Background Loss of smell and/or taste have been described in COVID-19 patients. Studies have not been conducted to evaluate the loss of smell and/or taste in the context of Nepal. Objective To investigate the prevalence of Ear, Nose and Throat related symptoms and assess smell and taste disorders in laboratory-confirmed SARS-CoV-2 patients. Method This prospective cross-sectional study evaluated patients from September 2020 to March 2021 with preceding COVID-19 diagnosis from a tertiary centre in Kathmandu. COVID-19 positive patients visiting out-patient department, quarantined or admitted were included. Patients were given questionnaire consisting of demographic data, history of smoking and evaluation of presenting symptoms. Loss of smell and taste were subjectively tested and followed up via telephone for ten weeks to evaluate for recovery time and degree of recovery. Result A total of 226 patients participated in the study, 18-92 years old (mean age, 36.77 ± 15.23 years; 53.5% males, 69% non-smokers). Majority of the patients had Myalgia (n = 128, 56.6%) as their presenting symptoms followed by fever (n = 122, 53.9%), loss of smell (n = 117, 51.7%), cough (n = 107, 47.34) and sore throat (n = 102, 45.1%). Loss of sense of smell and taste was reported in 51.8% and 42% respectively. The association between loss of sense of smell and taste was statistically significant (p < .001). All patients had some degree of recovery with 64.1% recovery of smell and 64.2% recovery of taste within 14 days of onset of symptoms. The mean recovery time for sense of smell and taste was 14.34 ± 9.82 days and 15.03 ± 10.06 days, respectively. Conclusion Olfactory and gustatory dysfunctions are cardinal features of COVID-19. They recover spontaneously along with other symptoms within few weeks. The absence of smell or taste in times of pandemic can be suggestive of potential COVID-19 infection and be used as a screening tool for early diagnosis and reduce transmission of the infection.

Clinical Profile of Patients Presenting with Gallstone Disease in University Hospital of Nepal.

Background Gallstone disease is one of the most common surgical problem throughout the world. The rise in gallstone disease burden and its wide spectrum of non-specific presentation makes the disease more challenging. Objective To know the various modes of presentation, socio-demographic details of the patients with gallstone disease, any associated factors and its treatment options. Method This is a prospective descriptive study in the patients presenting to Dhulikhel Hospital Kathmandu University Hospital diagnosed with gallstone during May 2018 to April 2020. After receiving ethical clearance from institutional Review committee, the informed consent was taken from all patient involved in the study. The presence of gallstone was confirmed by abdominal ultrasonography (USG). This study included total of 202 patients with gallstone disease. Result A total of 202 individuals with gallstone were included in the study; 48 males (24%) and 154 females (76%). The disease condition was common in age group 31-40 years (26.24%). Majority of the study population consumed mixed diet (92.57%). Out of 202 patients; 52 patients (25.74%) were overweight. In this study series 185 patients (91.58%) were symptomatic. Pain abdomen was one of the commonest symptoms (97.84%) followed by Nausea (28.11%), Dyspepsia (28.11%), Vomiting (18.38%), Fever (1.62) and Jaundice (1.08%). All cases were planned for laparoscopic cholecystectomy however 4 cases had to be converted to open surgery for completion. Conclusion Gallstone disease is a common surgical problem in Female population that presents most commonly with pain abdomen. Laparoscopic cholecystectomy can be easily performed in all cases of gallstone disease.

Admission Cardiotocography in Predicting Perinatal Outcome.

Background Antepartum assessment of the fetus is very important to prevent intra-uterine demise, birth asphyxia, neurological defect of newborns and neonatal mortality. Cardiotocography is the best indicator for fetal surveillance during labour in low resource country. Objective To assess on admission cardiotocography and predict perinatal outcome of antenatal mothers admitted to labour room for delivery at Dhulikhel Hospital, Kathmandu University Hospital. Method A prospective, observational study was conducted from 1st January 2016 to 31st December 2017. Antenatal mothers were evaluated in admission cardiotocography for 20 minutes. Cardiotocography studies were interpreted and categorized according to the classification proposed by National Institute of Clinical Excellence (NICE)- clinical guidelines 2007. Result Total 204 mothers were enrolled, the mean age is 24.06±4.331. Cardiotocography interpretation shows, 81.4% of Normal, 13.7% suspected and only 4.9% accounts pathological. Mother having CTG of pathological had more operative delivery 80% compare to normal and suspicious (0.0001). Similarly, more meconium stained liquor fall in pathological group with p value of 0.002. Fetal distress in labour is seen in all groups, showing 13.3% in normal, 32.1% in suspicious and 80% in pathological with p value 0.000. The duration of on admission cardiotocography to occurrence of fetal distress found to be mean hour of 9.57. Conclusion The admission cardiotocography test is useful to detect fetal distress which is already present at the time of test and can predict fetal wellbeing during the next few hours of labour. This test might lead to higher incidence of operative delivery at low resource countries because of lack of fetal blood sampling test to confirm fetal hypoxia during labour.

Developing tool and Measuring Integration Characteristics of Basic Science Curriculum to Improve Curriculum Integration.

Background Integrated curriculum enhances students' learning and the retention of knowledge. At Patan Academy of Health Sciences, integrated organ system based curriculum is used with Problem Based Learning as the principle teaching learning method to foster students' learning. In addition, other approaches of integration were under taken such as integrated assessment; logical arrangement teaching learning methods (lectures and practicals); joint effort of faculty in curriculum planning and delivery; conducive environment to foster hidden curriculum. This study describes the perception of faculty and students on integration characteristics of Basic Science curriculum. Objective To measure the integration characteristics of Basic Science Curriculum. Method Tool was developed to measure integration characteristics of Basic Science Curriculum and ensure whether such planned integration has been achieved. Mixed method was used to measure the perception of the integration characteristics i) quantitatively by questionnaire survey to faculty and students ii) qualitatively by in-depth interview of students. Result Both faculty and students perceived that all the blocks in Basic Science was well integrated in the quantitative questionnaire survey. But, in the in-depth interview, students perceived integration of curriculum in organ system blocks were better integrated compared to Principle of Human Biology blocks where fundamentals of basic science disciplines were delivered. Students reflected that Problem Based Learning not only integrated Basic Science disciplines but also with clinical sciences and the social context. But, students perceived that Community Health Sciences curriculum was not so well integrated with Basic Science subjects. Conclusion Overall, this study showed that planned integration in Basic Science curriculum was successfully executed during curriculum implementation.

Awareness and Knowledge of Oral Cancer among Medical Students in Kathmandu University School of Medical Sciences.

Background Oral cancer is a major public health problem worldwide. It has high mortality rates and chances of survival is relatively superior when detected early. Lack of knowledge and awareness about oral cancer among medical students may contribute to delay in diagnosis and treatment. Objective To assess awareness and knowledge of oral cancer among medical students. Method A cross-sectional study conducted among 286 students by Department of Otorhinolaryngology and Head & Neck surgery, Kathmandu University School of Medical sciences between July to August 2016. A questionnaire with questions on socio-demographic profile, awareness and knowledge of oral cancer was used. Independent sample t test and Pearson Chi-square tests were used for statistical analysis. Result Out of 329 students approached, 286 participated in the study yielding a response rate of 86.9%. Symptoms of oral cancer as reported were ulceration in mouth (92.3%), oral bleeding (85.0%),whitish or reddish patch (84.3%), halitosis (75.5%) and swelling in neck (74.5%), trismus (69.2%), numbness (67.1%), loosening of teeth (49.3%) and tooth sensitivity (41.6%). The perceived risk factors were smoking (97.2%), tobacco chewing (96.5%), chronic irritation (86.7%), immunodeficiency (83.9%), poor oral hygiene (88.5%), human papilloma virus infection (82.5%), dietary factors (81.1%), alcohol (79.4%), ill-fitting dentures (72.4%), hot spicy food (65.4%) and hot beverages (58.0%). Significant differences were found between pre-clinical and clinical students for knowledge of risk factors, signs and symptoms of oral cancer (p<0.001). Conclusion There is deficiency of knowledge among medical students about some aspects of oral cancer. Active involvement while examining patients and taking biopsies of malignant and premalignant lesions may help in improving students' knowledge about oral cancer.

Influence of Xe and Kr impurities on x-ray yield from debris-free plasma x-ray sources with an Ar supersonic gas jet irradiated by femtosecond near-infrared-wavelength laser pulses.

Many aspects of physical phenomena occurring when an intense laser pulse with subpicosecond duration and an intensity of 10^{18}-10^{19}W/cm^{2} heats an underdense plasma in a supersonic clustered gas jet are studied to determine the relative contribution of thermal and nonthermal processes to soft- and hard-x-ray emission from debris-free plasmas. Experiments were performed at the University of Nevada, Reno (UNR) Leopard laser operated with a 15-J, 350-fs pulse and different pulse contrasts (10^{7} or 10^{5}). The supersonic linear (elongated) nozzle generated Xe cluster-monomer gas jets as well as jets with Kr-Ar or Xe-Kr-Ar mixtures with densities of 10^{18}-10^{19}cm^{-3}. Prior to laser heating experiments, all jets were probed with optical interferometry and Rayleigh scattering to measure jet density and cluster distribution parameters. The supersonic linear jet provides the capability to study the anisotropy of x-ray yield from laser plasma and also laser beam self-focusing in plasma, which leads to efficient x-ray generation. Plasma diagnostics included x-ray diodes, pinhole cameras, and spectrometers. Jet signatures of x-ray emission from pure Xe gas, as well as from a mixture with Ar and Kr, was found to be very different. The most intense x-ray emission in the 1-9 KeV spectral region was observed from gas mixtures rather than pure Xe. Also, this x-ray emission was strongly anisotropic with respect to the direction of laser beam polarization. Non-local thermodynamic equilibrium (Non-LTE) models have been implemented to analyze the x-ray spectra to determine the plasma temperature and election density. Evidence of electron beam generation in the supersonic jet plasma was found. The influence of the subpicosecond laser pulse contrast (a ratio between the laser peak intensity and pedestal pulse intensity) on the jets' x-ray emission characteristics is discussed. Surprisingly, it was found that the x-ray yield was not sensitive to the prepulse contrast ratio.

Socio Demographic Predictors in Delayed Presentation of Head and Neck Cancer.

Background Head and neck cancer is a major public health problem worldwide. In spite of the increase in incidence, there has been paucity of research on socio demographic factors influencing head and neck cancer. Objective To study the influence of various socio demographic factors on late presentation of head and neck cancer. Method Prospective, analytical study conducted in 69 patients with Head and neck malignancies in Department of Otorhinolaryngology and Head and Neck surgery, Kathmandu University School of Medical sciences between January 2015 to January 2016. Collected data were entered and analyzed using IBM SPSS statistical software 21.0. All the socio demographic variables were compared between the early and late presentation groups of patient using Chi-square test. A 'p' value of < 0.05 was considered statistically significant. Result Forty eight were male and 21 were female. The age of patients ranged from 34 to 70 years (mean age 52.03). Twenty patients were diagnosed in stage I, 13 in stage II, 20 in stage III and 16 in stage IV. Significant association was seen between stage of head and neck cancer and duration of illness (p=0.007), educational status of patient (p=0.003) and educational status of patient's care taker (p=0.005). However, no statistical association was seen between stage at diagnosis of head and neck cancer and gender, type of family, previous consultation, systems of alternative medicine adopted before diagnosis, smoking habit, alcohol intake, tobacco chewing habit and occupation. Conclusion The results of this study suggest that educational status may influence the presentation of head and neck cancer.

Reflux Symptom Index and Reflux Finding Score in Diagnosis of Laryngopharyngeal Reflux.

Background Although laryngopharyngeal reflux is a common condition encountered in otolaryngological practice, its diagnosis is not very easy because of its indistinct symptoms Objective To assess the efficacy of proton pump inhibitors versus proton pump inhibitors with lifestyle modification in patients with laryngopharyngeal reflux. Method Prospective, analytical study conducted in Department of Otorhinolaryngology and Head and Neck Surgery at Dhulikhel Hospital, Kathmandu University Hospital between January 2015 to January 2016. Eighty two patients with laryngopharyngeal reflux having Reflux symptom index > 13 and Reflux finding score > 7 were included. Patients were divided into 2 groups. Group A comprised of patients treated with proton pump inhibitors alone and Group B with Proton pump inhibitors with lifestyle modification. Pre and post therapeutic reflux finding score and reflux symptom index were compared. Result The mean reflux symptom index score difference before and after treatment in group A was 16.70 and group B was 14.58. Similarly, mean reflux finding score difference before and after treatment in group A was 8.68 and group B was 9.92. Comparison of reflux finding score and reflux symptom index scores before and after treatment revealed improvement in both groups and the difference was statistically significant (p<0.001). However, comparison of pre and post therapeutic and scores between group A and B, showed no statistical significance. Conclusion The extent of symptomatic improvement correlated positively with both proton pump inhibitor therapy alone as well as with proton pump inhibitor therapy along with lifestyle modification. Although addition of lifestyle modification offered incremental benefit for treating laryngopharyngeal reflux, it was not found to be statistically significant.

Study to Compare and Evaluate Traditional vs. Endoscopic Septoplasty.

BACKGROUND: Surgery on a deviated septum has seen several modifications since its inception starting from radical septal resection to preservation of the possible septal framework. OBJECTIVE: To compare the efficacies of "Endoscope Septoplasty" over "Traditional Septoplasty" in treating pathological septum and turbinates, in terms of their outcome. METHOD: Prospective descriptive study conducted on 60 patients who presented to the Department of ENT, Kathmandu University School of Medical sciences during a period of two years. The severity of the symptoms of the patients was scored using a visual analogue scale which was compared post operatively to subjectively evaluate the efficacy of either surgery. Objective assessment was done by nasal endoscopy. P value in case of subjective and objective evaluation was done by applying Z- test. RESULT: The mean age ± SD was 29.5±1.2 .Maximum patients fell into age group of 21-30 with 31.7 % followed by 11-20 with 28.3% and then 31-40 with 25%. There were total 35 males (58.3%) and 25 females (41.7%). Among the symptoms, nasal obstruction seems to be dominating with total of 83.3%, followed by postnasal drip with 66.6% and then headache with 60%. The types of dislocation was compared, there were 66.7% cases with DNS and Spur whereas only 10 % with isolated spur. C shaped deformity was seen in 30% and S shaped in 26.6 % cases. Significance in Z test, is seen in subjective assessment post surgery for nasal obstruction, headache and rhinorrhea and for objective assessment post surgery for persistent contact with turbinates. (p value set to 0.01). CONCLUSION: Endoscopic surgery is an evolutionary step towards solving the problems related to deviated nasal septum. It is safe, effective and conservative alternative to conventional septal surgery.

Evaluation of Etiology of Epistaxis and its Management in Dhulikhel Hospital.

BACKGROUND: Epistaxis is one of the most common and most difficult emergencies presenting in 7-14% of the general population each year. Although its lifetime incidence is about 60%, only 6% require formal medical intervention but they can be serious and even life threatening. OBJECTIVE: The main objectives are to study different etiology, types, modality of treatment of epistaxis. Specific objective is also to find out if the modality of treatment is associated with age, site, amount of bleeding and etiology. METHOD: It is a prospective, cross sectional, longitudinal, analytical study done in Department of ENT, Dhulikhel hospital, Kathmandu University School of Medical Sciences (KUSMS) from Aug. 2010 to Aug. 2013. Data was collected. This study was cleared through institutional review committee of hospital. Statistical analysis was done using SPSS 16.0. RESULT: 487 patients were studied during the period. There was significant association between age group with type of treatment (p value 0.002); and with admission (p value < 0.001). Significance in the study was also shown in the correlation between site of bleeding and the type of treatment and also with alcohol intake with site of bleeding (p value < 0.001).However there was no significance between hypertension and the type of treatment methods chosen (p value > 0.01). CONCLUSION: Management of epistaxis is challenging. Most are managed by non surgical means whereas some by surgical treatment. Non surgical treatment is still useful, safe and cost effective. Type of treatment and need for hospital stay is related to age and site of bleeding.

Study of Microorganism Growth Pattern in Nasal Pack of Patients Visiting the Department of ENT, Head and Neck Surgery.

Background Nasal packs are utilized nearly by otorhinolaryngologists for controlling epistaxis and post nasal procedures. Complications have been reported due to them; therefore the use of antibiotics is a common practice among otorhinolaryngologists. Objective To detect microbiological flora associated with nasal packing and find evidence to support the benefit of systemic antibiotics with it. Method A prospective, analytical study was conducted on 51 patients presenting to the Department of ENT, KUSMS from June to September 2015 who required nasal packing. Approval of the local Institutional review committee (IRC) was taken. The mid part of the pack was collected in a sterile bottle under aseptic technique and sent to microbiology department. Specimen collection, culture, identification tests were done according to the guidelines by American Society for Microbiology. Data were collected using the individual patient records and Microsoft Office Excel 2007. Statistical analysis was performed with SPSS 16.0. Result Among the 51 cultures; 33 (64.7%) were positive. In 18 (35.3%) cultures no organism was grown. Statistical analysis did not show significance between duration of pack kept with microbial growth (p=0.051) or the type of pack kept (p=0.212) .It showed significance with foul smell of the pack to the growth (p <0.001). Conclusion Microbiological flora was associated with nasal pack. Antibiotic soaked nasal packs have lesser incidence of positive bacterial growth when compared with plain nasal packs. Nasal packs kept for less than 48 hours have lesser incidence of positive bacterial growth when compared with nasal packs kept for more than 48 hours. Therefore, administering systemic antibiotics in cases when we plan to keep the pack for longer duration is recommended.

Note: application of UF-4 emulsion films to detect low-energy ions from plasmas produced by laser ablation.

Detection of low-energy ions via Thomson parabola mass analyzer in the absence of any additional electrical systems is examined. Numerous low-energy ions were recorded on UF-4 solid state emulsion films. Kinetic energies between 1 and 4 keV of ions generated by YAG laser focused on Al and Ti targets were obtained using Thomson parabola measurements. Characteristics of ion tracks on the UF-4 detector are discussed in terms of pressure ranges of vacuum chamber. Moreover, differences in charges of ions between this study and previous spectroscopic measurements are discussed.

Compact hohlraum configuration with parallel planar-wire-array x-ray sources at the 1.7-MA Zebra generator.

A compact Z-pinch x-ray hohlraum design with parallel-driven x-ray sources is experimentally demonstrated in a configuration with a central target and tailored shine shields at a 1.7-MA Zebra generator. Driving in parallel two magnetically decoupled compact double-planar-wire Z pinches has demonstrated the generation of synchronized x-ray bursts that correlated well in time with x-ray emission from a central reemission target. Good agreement between simulated and measured hohlraum radiation temperature of the central target is shown. The advantages of compact hohlraum design applications for multi-MA facilities are discussed.

Correlations between symptoms, nasal endoscopy computed tomography and surgical findings in patients with chronic rhinosinusitis.

BACKGROUND: Although chronic rhinosinusitis (CRS) is increasing in prevalence and incidence, its diagnosis and treatment still pose a challenge. The Task Force on rhinosinusitis (TFR) advocates the use of symptom based criteria. However, many otorhinolaryngologists depend on diagnostic nasal endoscopy and computed tomography (CT) of paranasal sinuses for diagnosis of CRS. Computed tomography has been extensively relied upon in confirming the presence of CRS, in assessing severity of disease, surgical planning and management decisions. Despite its widespread use, several studies have failed to correlate findings on CT with symptom severity. OBJECTIVE: To determine the correlations between symptoms described at presentation, radiological findings, endoscopy and extensiveness of surgery. METHODS: Longitudinal, prospective, analytical study conducted from August 2011 to August 2012 among 87 patients diagnosed as CRS according to the TFR criteria. Symptom, endoscopic, radiological and surgical scoring was done by using Lund and Mackay staging system. Pearson correlation coefficients between scores for symptoms, endoscopy, sinus CT and surgery was determined. RESULTS: When overall symptom score was correlated with radiological score and endoscopy score, it was found to be statistically significant (p= <0.01). However, no significant relationship was found between Lund and Mackay symptom and surgery score. CONCLUSION: The symptom criteria used by TFR for CRS diagnosis are not very specific for sinus disease. A detail assessment of the subjective and objective criteria (CT and endoscopy) is necessary for tailoring surgical plan but should not be relied upon for determining the extensiveness of surgical intervention.

The correlation between fine needle aspiration cytology and histopathology of head and neck lesions in Kathmandu University Hospital.

BACKGROUND: Fine needle aspiration cytology (FNAC) with it's minimally invasiveness has been a well accepted procedure in the initial diagnosis of various swellings. With time and experience high sensitivity and specificity of FNAC over conventional open biopsy has lead to the wide acceptance of this procedure. OBJECTIVE: To evaluate the utility of aspiration cytology as a first-line diagnostic tool in palpable head and neck masses and correlate with histologic results for evaluating diagnostic accuracy. METHODS: A hospital based prospective, comparative study was conducted among patients with various swellings at Head and Neck regions in the Department of Pathology, Dhulikhel Hospital between July 2011 to June 2012. FNAC were done from the palpable masses of head and neck regions and were compared with biopsy findings of the same lesions. Data entry and analysis performed using SPSS version 16. The sensitivity, specificity and accuracy rates were calculated. RESULTS: A total 64 patients were subjected to both FNAC and histopathological examination (HPE). Total 39 (61 %) were females and 25 (39 %) were males with M: F ratio of 1:1.6. The age group ranged from 9 to 80 years. Twenty five percent of patients were in the age group below 20 years. The highest number of cases included lymph nodes 29 (45%) followed by thyroid 24(37.5 %), salivary glands 10(16%) and 1 case (1.6%) was a soft tissue swelling over the occipital region. Highest sensitivity, specificity and accuracy rate for diagnosis by FNAC were observed in thyroid. The overall sensitivity and specificity of FNAC were 86% and 97% respectively in determining the various pathologies. The overall accuracy of FNAC in present study was 87.4%. CONCLUSION: FNAC is a minimally invasive first line investigation with a high sensitivity and specificity for the diagnosis of various head and neck lesions.

Clinicoradiologic evaluation of Eagle's syndrome and its management.

BACKGROUND: Eagle's syndrome (Elongated styloid process) is often misdiagnosed due to its vague symptomatology. The diagnosis relies on detail history taking, palpation of styloid process in tonsillar fossa and imaging modalities. OBJECTIVE: To assess the length and medial angulation of elongated styloid process with the help of three dimensional computed tomography (3D CT) scan and to describe our clinical and surgical experience with patients suffering from Eagle's syndrome. METHOD: Prospective, analytical study conducted from August 2011 to August 2012 among 39 patients with Eagle's syndrome. Detailed history taking, clinical examination and 3D CT scan was performed. Length and medial angulation was calculated. Patients with styloid process length longer than 2.50 cm underwent surgical excision via intraoral approach. Medial angulation of styloid process on both sides was correlated with each other using rank correlation coefficient. Wilcoxon Signed Rank test was applied to test significant difference between pre-operative and postoperative symptoms scores. RESULT: Significant positive correlation was found between the medial angulation of styloid process on right side and left side (? =0.81, p<0.001). Significant difference was also observed between pre and post-operative symptoms scores (z=-5.16, p<0.001) . CONCLUSION: Possibility of Eagle's syndrome should always be considered while examining patients with vague neck pain. 3D CT reconstruction is a gold standard investigation which helps in studying the relation of styloid process with surrounding structures along with accurate measurement of its length and medial angulation.

Household passive smoking and acute respiratory infection among under-five children attending Kanti Children's Hospital.

BACKGROUND: Worldwide, children are more heavily exposed to passive smoking than any other age group where majority of these occur in child's house.Children's passive smoking and risk of developing respiratory diseases has been well established in several studies. However, such studies are limited in Nepal. Therefore, the objective of this study was to determine association between household passive smoking and acute respiratory infection among under- five children attending Kanti Children's Hospital. METHODS: A descriptive, cross-sectional study using quantitative method was carried out in Kanti Children's Hospital. Data was collected by face-to-face interview from 198 parents.Bivariate and multivariate analyses were performed to see association between household passive smoking and acute respiratory infection. RESULTS: Among 198 children, 79(39.9%)were passive smokers. Among the total passive smokers, 31(39.2%) were exposed to paternal smoking, 18(22.8%) to parental smoking, 18(22.8%) to other member's smoking and 12(15.2%) to maternal smoking. Among 36 daily passive smokers, 18(50.0%) were exposed to high amount and 18(50.0%) to low amount of passive smoking. Household passive smoking had a slight risk of developing acute respiratory infection where adjusted odds ratio was 1.35;however it was not statistically significant. CONCLUSIONS: Children exposed to passive smoking had a slight risk of developing acute respiratory infection than non-passive smokers however, it was not statistically significant.

Wire ablation dynamics model and its application to imploding wire arrays of different geometries.

The paper presents an extended description of the amplified wire ablation dynamics model (WADM), which accounts in a single simulation for the processes of wire ablation and implosion of a wire array load of arbitrary geometry and wire material composition. To investigate the role of wire ablation effects, the implosions of cylindrical and planar wire array loads at the university based generators Cobra (Cornell University) and Zebra (University of Nevada, Reno) have been analyzed. The analysis of the experimental data shows that the wire mass ablation rate can be described as a function of the current through the wire and some coefficient defined by the wire material properties. The aluminum wires were found to ablate with the highest rate, while the copper ablation is the slowest one. The lower wire ablation rate results in a higher inward velocity of the ablated plasma, a higher rate of the energy coupling with the ablated plasma, and a more significant delay of implosion for a heavy load due to the ablation effects, which manifest the most in a cylindrical array configuration and almost vanish in a single-planar array configuration. The WADM is an efficient tool suited for wire array load design and optimization in wide parameter ranges, including the loads with specific properties needed for the inertial confinement fusion research and laboratory astrophysics experiments. The data output from the WADM simulation can be used to simplify the radiation magnetohydrodynamics modeling of the wire array plasma.

X-ray absorption spectroscopy of aluminum z-pinch plasma with tungsten backlighter planar wire array source.

Absorption features from K-shell aluminum z-pinch plasmas have recently been studied on Zebra, the 1.7 MA pulse power generator at the Nevada Terawatt Facility. In particular, tungsten plasma has been used as a semi-backlighter source in the generation of aluminum K-shell absorption spectra by placing a single Al wire at or near the end of a single planar W array. All spectroscopic experimental results were recorded using a time-integrated, spatially resolved convex potassium hydrogen phthalate (KAP) crystal spectrometer. Other diagnostics used to study these plasmas included x-ray detectors, optical imaging, laser shadowgraphy, and time-gated and time-integrated x-ray pinhole imagers. Through comparisons with previous publications, Al K-shell absorption lines are shown to be from much lower electron temperature (∼10-40 eV) plasmas than emission spectra (∼350-500 eV).