Multi-modality Typical Imaging features in Superior Pulmonary Sulcus (Pancoast) tumour: A case report

A 53 years old male patient came with complaints of pain and tingling sensation of left shoulder joint & left upper limb since 3 months. Patient is a chronic smoker with past history pulmonary tuberculosis. The patient had completed ATT 15 years bac

Acute necrotizing encephalopathy in a young adult with EBV and COVID19 co-infection: A case report

Clinical history: A 22yr old female came with complaints of fever and altered sensorium since 2 days. Serology showed positive for Epstein-Barr virus (EBV) and COVID-19 IgG antibodies. Laboratory investigations revealed elevated total counts & inflammatory markers

Post COVID-19 Avascular Necrosis Of Hip – A Rare Case Report.

27 year old male diagnosed with COVID 19 got admitted in our hospital, and was treated on antibiotics, antivirals and short course of steroids. He was discharged after an uneventful course and resolution of symptoms. Three months later, patient presented with acute hip pain and was screened plain radiograph of Hip

Central Venous Catheter-Associated Pericardial Tamponade in a 6-Day Old: A Case Report

Introduction. Pericardial effusion (PCE) and tamponade can cause significant morbidity and mortality in neonates. Such cases have been reported in the literature in various contexts. Case Presentation. A 6-day old neonate with meconium aspiration syndrome and persistent pulmonary hypertension of newborn on high frequency oscillator ventilation and inhaled nitric oxide was referred to our hospital with a large pericardial effusion causing hemodynamic compromise. Prompt pericardiocentesis led to significant improvement in the cardio-respiratory status and removal of the central line prevented the fluid from reaccumulating. Cellular and biochemical analysis aided in the diagnosis of catheter related etiology with possibility of infusate diffusion into the pericardial space. Conclusion. We present this paper to emphasize the importance of recognizing this uncommon but serious complication of central venous catheters in intensive care units. We also discuss the proposed hypothesis for the mechanism of production of PCE

Spider web approach hardness validation of peak aged Al6061/SiC/h-BN composite and related mechanical characterization

Current work focusses on stir cast Al6061 based composites with SiC (3, 6, 9 wt.%) and h-BN (1, 2, 3 wt.%) as reinforcements and subjected to heat treatments followed by mechanical characterization. Quality level of composites is confirmed from reinforcement distribution and hardness uniformity in castings after homogenization. The castings were further subjected to peak aging and hardness data is refined for accuracy using Spider web approach. Due to lack in the reinforcement spreadout, especially higher volume quantity of h-BN, the peak hardness of Al6061/9 wt.% SiC/3 wt.% h-BN as estimated by Spider web approach is less than the recorded value. The Minitab result is in line with that of experimentally supported Spider web approach. Due to the result of nonuniform dispersivity, beyond the optimum quantity of reinforcement content, fracture surface resulted coarse mirror facets with lower tensile and wear properties. 2 wt.% h-BN quantity with 6 wt.% SiC in the composite is regarded as the optimum quantity of reinforcement, resulted excellent tensile strength with least ductility among the family and is at par with hardness variation trend. It is found that optimum quantity of solid lubricant h-BN in the composite resulted excellent wear resistance even at higher normal loads

Head and neck imaging manifestations in COVID-19: collective experience of 17 months during 2nd wave of the pandemic

Abstract Background COVID-19 is well known to result in pulmonary and multiple extra-pulmonary manifestations. Among them, head and neck manifestations were commonly recognized in the 2nd wave of the pandemic. With the growing global COVID-19 burden, imaging is of utmost importance in diagnosing the disease and its related complications. The study aims to enumerate the various head and neck manifestations and their complications in COVID-19. Additionally, in sinusitis patients, the invasion was correlated with the neutrophil–lymphocyte ratio (NLR). Results A cross-sectional observational study in which total of 78 COVID-19 cases that underwent head and neck imaging were retrospectively evaluated. The cohort included 52 males (66.7%) and 26 females (33.3%) with a mean age of 46.19 years (median = 49.0, SD = 16.47). The various head and neck manifestations included non invasive rhinosinusitis (n = 48), invasive sinusitis and its complications (n = 25), nasal septal abscess (n = 1), dacryoadenitis (n = 1), pre-septal and post-septal orbital cellulitis and its complications (n = 13), otitis media, mastoiditis and its complications (n = 6), parotitis (n = 2), neck vessel thrombosis (n = 2) and cervical lymphadenopathy (n = 3). An increase in the invasive nature of sinusitis was demonstrated among patients with comorbidities and elevated NLR. Conclusions Early diagnosis and management of head and neck manifestations of COVID-19 are aided by prompt imaging. It is imperative that we are armed with the knowledge of various head and neck manifestations and how they may bear semblance to other pathologies for us to ensure COVID as a differential, especially in the background of known infection

Pediatric SubQ-ICD implantation, a single center review of the inter-muscular technique.

INTRODUCTION: Pediatric patients with cardiomyopathies are at risk for sudden death and may need implantable cardioverter defibrillators (ICDs), but given their small size and duration of use, children are at increased risk for complications associated with ICD use. The subcutaneous ICD presents a favorable option for children without pacing indications. Unfortunately, initial pediatric studies have demonstrated a high complication rate, likely due to the 3-incision technique employed. MATERIAL AND METHODS: Patients with ICD but no pacing indication were retrospectively reviewed after implantation of subcutaneous ICD via the two-incision technique. In half of the patients, 10-J impedance test was also performed to compare with impedance obtained after defibrillation threshold testing with 65-J. RESULTS: Twelve patients were included. The median age was 14 years (range 10-16 years) with eight males included (72.7%). The median weight was 55 kg (range 29 kg-75.1 kg). Follow-up had a median of 11.5 months (range 2-27 months). The median body mass index was 18.4 kg/m squared (range 15.5-27.9 kg/m squared). One patient suffered a minor complication after tearing off the incisional adhesive strips early and required a non-invasive repair in clinic. Shock impedance had a median of 55 J (range 48-68 J). There was one appropriate shock/charge and no inappropriate shocks during follow-up. CONCLUSION: The two-incision, intermuscular technique appears to have a lower acute complication rate than prior reports, in our cohort of 12 pediatric patients

High-temperature dry sliding wear behaviour of pre-aged 3-step T6-treated Al7075 hybrid matrix composite

AbstractThe focus of current work is to narrow the understanding of high-temperature dry sliding wear behaviour of Al7075 and its composite, which contains Si3N4 and 2 wt.% granite powder and is pre-aged and T6-treated in 3-steps. The composite is prepared by conventional stir casting. The time to attain peak hardness at 100°C, 120°C and 150°C is taken as the basis to fix the duration of each step in 3-step aging process. The alloy and composite were initially pre-aged and are followed by 3-step T6 treatment. The alloy and composite hardness due to this heat treatment were 185.6 and 197.6 VHN respectively. Further the treated alloy and composite were subjected to temperature dependent isothermal dry sliding wear by choosing the operating temperature as 35°C, 70°C, 140°C and 210°C. The results showed that, average wear rate of alloy was more as compared to composite for each of the temperature and normal load. An inverse relation is noticed among hardness and wear rate. But wear rate was found to vary in direct relation to the temperature. Also the co-efficient of friction showed an increasing trend with increase in temperature. It is found to be noticeably high for alloy than the composite for all temperature and normal load

Feasibility Study of Catheter-Based Interventions for Anisotropic Expanded Polytetrafluoroethylene Cardiovascular Conduits in a Growing Lamb Model

Background Cardiovascular repair in children often requires implant of conduits which do not have growth potential and will require reoperation. In the current study we sought to determine the feasibility of catheter-based interventions of anisotropic conduits inserted as interposition grafts in the main pulmonary artery (MPA) of growing lambs. Methods Lambs underwent interpositional implant of either an anisotropic expanded polytetrafluoroethylene (ePTFE) (Test) conduit or conventional PTFE (Control) conduit. In the postoperative period, lambs were anesthetized and underwent catheter-based interventions consisting of hemodynamic and angiographic data collection, balloon dilation and/or stenting of the conduit at 3, 6 or 9 month postoperative time point. Results At 3 months, control lambs showed significant increases in right ventricular pressures and trans-conduit gradients in comparison to test lambs. Test conduit diameters were significantly larger compared to controls due to spontaneous radial expansion of the anisotropic conduit. Balloon dilation of test conduits at 3 and 6 months showed a reduction in RV pressure and statistically significant improvement in the RV outflow tract gradient as well as significant increase in graft diameter, compared to both control and pre-dilation conditions. Furthermore, the test conduit diameter increased significantly compared to the pre-balloon and control conditions at each time point. Necropsy of test conduits showed no evidence of tears, perforations, or clot and smooth interiors with well-healed anastomoses. Conclusions Anisotropic conduits implanted as interposition grafts in the MPA show spontaneous expansion, and can safely and effectively undergo catheter-based interventions, with significant increases in graft diameter occurring after balloon dilation