A 51-year-old man underwent surgery after being diagnosed with a flail chest by 4D-CT. 4D-CT adds a time axis to 3D-CT; hence, it can be performed in patients with a flail segment to aid in pre-operative evaluation of the most effective fixation site.

In the present study, effect of operators on fundamental physical quantities in three orthogonal coordinate systems was analyzed using differential equations. The mathematical expression for position vector and its magnitude, velocity and acceleration in three orthogonal coordinate systems were obtained from the geometry of the figure and differentiation. The derivations of operation of vector differential operators (curl and diversions) on position vector were derived and their physical significance was illustrated. Similarly, the operation of Laplacian operator on magnitude of position vector was also studied. The study highlighted the invariance in results of all operations in three orthogonal coordinates systems. An investigation has been performed to describe wall of death and globe of death problem in appropriate orthogonal coordinate systems. The interpretations in term of velocity, acceleration, and net force acting on vehicle are explained in details.

Understanding the species richness pattern along elevational gradients and its driving mechanisms is critical for biodiversity conservation. We examined the elevational patterns of species richness and evaluated the effects of spatial and environmental factors for all mosses, acrocarpous mosses, and pleurocarpous mosses, respectively, predicted a priori by alternative hypotheses, including mid-domain effect (MDE), habitat complexity, energy, and environment. We assessed the contribution of elevation toward explaining the heterogeneity among sampling sites for each group. Last, we compared the occurrence probability and proportional use of community type along the elevational gradient between acrocarpous mosses and pleurocarpous mosses. We observed negatively skewed (hump-shaped) distribution pattern of species richness along the elevational gradient for each group. The habitat complexity and the MDE hypothesis were supported for the patterns of all mosses and acrocarpous mosses; whereas the habitat complexity and the environment hypothesis were supported for the pattern of pleurocarpous mosses. For many low-lying sampling sites with sunny and dry conditions, extinction and dispersal limitation are the primary processes producing low species richness pattern, which decreases the overall average diversity for each group. The variations of the occurrence probability and proportional use of community type along the elevational gradient between acrocarpous mosses and pleurocarpous mosses explain the contributions of elevation toward the heterogeneity among sampling sites for all mosses. Higher sensitiveness to environmental changes could contribute to a larger increase of species diversity from unfavorable to optimal environment conditions, enlarging elevation effect on explaining the heterogeneity among sampling sites for pleurocarpous mosses.

Background: An association has been demonstrated between heart rate variability (HRV) and cardiac events in some diseases. However, the association with new-onset atrial fibrillation (AF) after coronary artery bypass graft (CABG) is still controversial. This study aimed to investigate the association between HRV and new-onset AF in patients undergoing CABG during a 6-month follow-up. Methods: This cross-sectional study involved 119 consecutive patients undergoing off-pump CABG. All patients were assessed with 24-hour Holter recordings 2 days before CABG and 1 week, 3 months, and 6 months postoperatively. HRV was analyzed, and AF was detected from its recordings. Main results: In patients undergoing CABG, NYHA III increased the AF rate at 7 days, and advanced age and diabetes were associated with AF at 6 months postoperatively. A reduction in time-domain measurements before surgery was significantly associated with a higher risk of developing AF at 7 days postoperatively, no association between preoperative HRV and AF was found at 6 months. Reduced preoperative HRV (SDNN < 50 ms) was the independent predictor of AF at 3 months (AUC = 0.65) and 6 months (AUC = 0.62) following surgery. Conclusions: A reduction in time domain before CABG was associated with a higher risk of new-onset AF at 7 days postoperatively but not at 6 months. SDNN <50 ms was an independent predictor of higher incidence of AF at 3 and 6 months post surgery.

This study addresses the variability of the mitochondrial cytochrome oxidase subunit I (COI) and 16S rDNA (16S), and nuclear internal transcriber spacer ITS2 (ITS2) genes in a set of purposely collected samples of the cattle tick, Rhipicephalus microplus (Canestrini, 1888) introduced in the Nearctic-Neotropical range (Mexico to Argentina), and in geo-referenced sequences from GenBank. The main aims of the study are (i) to provide evidence of the phylogeny of the tick in the region, as consequence of a single or several introductions, (b) to explore a possible impact of environmental traits, and (c) to check for the effect of geographical distance on genetic variability. We included published sequences of Rhipicephalus annulatus (Nearctic, Afrotropical and Mediterranean), R. microplus (Afrotropical, Asia), to fully characterize the Neotropical populations (total: 74 16S, 44 COI, and 49 ITS-2 sequences included in the analysis). Only clade A of R. microplus spread in the Nearctic-Neotropics. The K statistic, a measure of phylogenetic signal, supports low divergence rates of every tested gene in populations of R. microplus in the target region even under diverging environmental conditions. This test demonstrates that spatial distance and genetic variability are negatively correlated. The low variability of these genes may be due to (i) the recent introduction of the tick in the Neotropics, (ii) a high degree of panmixia because exchange of populations, and (iii) low environmental pressures, promoting a lack of genetic drift. These results have implications for the ecology and control of cattle tick infestations.

Veno-Arterial extracorporeal membrane oxygenation (V-A ECMO) is an effective circulatory aid device, which has been increasingly used in extracorporeal life mechanical support for rescuing shock caused by various causes. However, it is generally agreed that V-A ECMO has significantly increased the left ventricular afterload of the supported heart during operation, resulting in limited aortic valve opening, increased intracardiac pressure, and A series of adverse outcomes of left ventricular dilation. If not duly assessment and intervention enough, the recovery of cardiac function is delayed. Based on the hemodynamic characteristics of V-A ECMO, we review the whole spectrum of Left ventricle unloading (LVU) combined with V-A ECMO reported to date.

Here, we describe a heterojunction bipolar transistor (HBT) voltage-controlled oscillator (VCO) showing extremely low frequency drift with temperature using a compensation capacitor CCO across the base-collector electrodes. CCO has a 5~10 times value of junction capacitor and it efficiently shields resonance frequency stability from junction capacitance fluctuation with temperature. Taking advantage of the added capacitor CCO, we can use smaller capacitors to implement the Clapp-like structure oscillator with a compact layout. Fabricated with 2μm GaAs HBT technology, the oscillator achieves a frequency drift rate < 0.6MHz/℃ and >8dBm output power in 2.5-7.2GHz output frequency band. Excellent 2nd harmonics suppression <-30dBc and superior phase noise of -87dBc/Hz@10KHz and -105dBc/Hz@100KHz are observed at room temperature.

K-band, as an important application frequency band in the microwave frequency band, is widely used in wireless communication, RF identification and civil radar. And K-band microstrip antenna has become a research hotspot in recent years due to its advantages of small size and good directionality. In this paper, a miniaturized Multiple-input Multiple-output (MIMO) antenna is designed to widen the bandwidth of the antenna by cutting the angle of the radiating patch and digging a slot in the ground plane; meanwhile, a raised rectangular parasitic branch with an open slot is placed on the ground plane and a Complementary Split-Ring Resonator (CSRR) is etched to generate a resonance at a fixed frequency point. resonance at a fixed frequency point, effectively reducing the mutual coupling. The simulated and measured results show that the overall size of the antenna is only 15×24×0.8mm3, the overall isolation is less than -18.3dB in the operating bandwidth range of 17~27.2GHz（relative bandwidth reaches 46.2%）, and the Envelope Correlation Coefficient (ECC) is less than 0.001, so the designed K-band MIMO antenna has good radiation characteristics and gain

The capacitor-less low dropout voltage regulator applied to mobile devices increases the power consumption due to the continuously exposed peak voltage. The dynamic feedback loop for the LDO regulator proposed in this study can provide a function to stably control the peak voltage regardless of the change in the load current.

This analysis, using published authentic data, will explore the existing/ guided strategy of the global mass vaccination program to combat the COVID-19 crisis.  It mainly focused on countries that experienced unprecedented deaths in the later period and the period covered is till 21st March 2022. The peak of deaths in later months reached an all-time high since the beginning of the pandemic. Nine countries identified in that category are Singapore, South Korea, Australia,  Hong Kong,  Iceland,  New Zealand, Denmark,  Finland and Japan. Almost all of those countries had nominal cases and deaths prior to September 2021 (vaccine third dose was initiated). Interestingly, all those nine countries had very high vaccination rates and were among the topmost vaccinated countries during the covered period. Israel started mass vaccination first and initiated the fourth dose at the beginning of January 2022; soon afterward, not only cases but also, deaths reached an all-time high. Israel also introduced vaccine doses among children of various age groups first and was in fact, leading or guiding the vaccine roll-out strategy. Gibraltar on the other hand implemented the most successful mass vaccination programme, from the beginning. Gibraltar was the country that achieved the highest target for vaccination at the earliest. It attained and maintained 100% vaccination since May 2021, though cases of the latest peak in March 2022 reached an unprecedented high for the whole of the pandemic. All the data analysed here started from the beginning of the pandemic and was presented using government official COVID tool Ourworldindata. Moreover, cases as well as deaths in later periods among vaccinated groups, were also compared with the unvaccinated ones, for the UK, based on the country’s government report. That indicated an unusual surge of cases and deaths in later periods among vaccinated groups compared to the unvaccinated ones.  Various observed facts, supported by well-known and established scientific theories, indicate that high vaccination may weaken natural immune response which needs urgent policy action.

AbstractDental Fear and Anxiety (DFA) is the fear and anxiety an individual associates with going to the dentist. Researchers are encouraged to find and eliminate DFA since this will improve oral health and quality of life in the long run. Understanding the biology behind fear and anxiety can greatly help us in the management approaches. The amygdala is referred to as a ”fear centre,” and it has been found that fear and anxiety share overlapping neural circuits. As a result, DFA can impact both the patient-dentist relationship and the dental treatment strategy. This article thus aims to discuss the causes of DFA, and also the ways we can overcome it. Dental anxiety is caused by various fears, including fear of pain, blood-injury fears, lack of trust, and so on. It leads to the avoidance of dental care. Psychotherapeutic interventions, pharmaceutical interventions, or a combination of both can be used to manage dental anxiety. On the patient front, they should discuss their fears with the dentist, try to distract themselves, and employ breathing exercises or other mindfulness techniques like those mentioned in the article.

Stable isotopes respond sensitively to environmental evolution and record it in different geological archives due to fractionation. The stable isotope composition of water ( δ 18O and δ 2D) has been widely applied in fields including hydrometeorology, weather diagnosis, and palaeoclimate reconstruction. In recent years, the stable oxygen isotope of precipitation ( δ 18O p) in southern China are valuable proxies of environmental variables, however, their interpretations of them have been controversial. Considering that the summer monsoon circulation brings about a large amount of precipitation, the temporal variation and range of the annual δ 18O p are consistent with those of the summer δ 18O p. Based on the observed and simulated data on oxygen isotope composition of precipitation, the linkage between summer precipitation ( P) and δ 18O p in the Dongting Lake Basin and their possible influencing factors are demonstrated. Meanwhile, the contribution of different factors is analyzed by using multiple linear stepwise regression. The results indicate that the temporal variation of summer δ 18O p is consistent with that of annual δ 18O p and the amount effect is identified in summer in the basin. Besides, the annual δ 18O p shows a significantly negative correlation with summer precipitation. It demonstrates that the value of stable isotopes in precipitation may be considered a proxy of summer precipitation in Dongting Lake Basin. Statistically, on an interannual timescale, the more south-westerly the Western Pacific Subtropical High (WPSH) extended, the higher the δ 18O p was and vice versa, indicating that there appeared circulation effect in the basin. In regression models based on the observed data in Changsha and the simulated data for the entire basin, the local summer precipitation always served as an important factor. It can be exemplified by comparing the local and upstream rainout along with water vapor flux transporting pathways in dry and wet summers. These results can potentially improve the reconstruction of paleoclimate in the East Asian monsoon region. Further study is needed to determine the contribution of local and large-scale factors to the oxygen isotope composition of precipitation.

Objectives: Allergic fungal rhinosinusitis (AFRS) has unique clinical symptoms, radiology, and histopathological patterns. It is easy to be misdiagnosed because of the low detection rate of fungi. The purpose of this study was to improve the diagnostic rate by analyzing these data of the clinical, radiology and pathological of AFRS. Methods: The data of patients with chronic rhinosinusitis (CRS) treated in the Department of Otolaryngology-Head and neck surgery of the First Affiliated Hospital of University of Science and technology of China (USTC) from January 2015 to December 2020 were analyzed. The discharged patients diagnosed with AFRS and the suspected cases in the description of radiology or surgical records were reviewed, combined with specific immunoglobulin E (IgE) examination, they were divided into three groups: AFRS, suspected AFRS and fungal ball sinusitis (FBS). The age, gender, eosinophils and basophils in peripheral blood, total serum IgE, invasion of sinuses, bone erosion, computed tomographic (CT) Lund-Mackay score, whether accompanied with allergic rhinitis, asthma, and olfactory hypothyroidism were all analyzed. Results: 631 patients with non-invasive fungal sinusitis were treated in the past 6 years. 29 cases of AFRS, 69 cases of suspected AFRS and 533 cases of FBS. A total of 98 confirmed and suspected AFRS cases were identified, with an average age of 34.3 years. 79 cases of multiple paranasal sinus invasion and 55 cases of bilateral paranasal sinuses. 25 cases with bone erosion. There were no significant differences in age, eosinophils percentage, basophils percentage, total serum IgE, CT Lund-Mackay score, combined with allergic rhinitis, asthma and hypoolfactory between AFRS and suspected AFRS. However, significant differences were observed in the above indicators between AFRS or confirmed AFRS and FBS. Conclusion: AFRS may be misdiagnosed due to the low detection of fungi. Clinical, laboratory, radiology and histopathological need to focus on improving the detection rate of fungi in AFRS. In order to reduce the recurrence of the disease, we can consider the diagnosis of AFRS for patients with clinical, radiology and immunological characteristics consistent with AFRS but without fungal etiology

Background: Our centre has favoured primary surgery over chemoradiotherapy(CRT) for specific advanced laryngeal cancer patients with large volume tumours, airway compromise, significant dysphagia and T4 disease. Some reports suggest surgery is associated with higher oncological control than organ-preservation strategies. This study reports the survival outcomes for a modern, high-volume head and neck centre favouring surgical management approaches. Methods: Patient data was collated retrospectively over a 7-year period from a tertiary head and neck specialty centre. Kaplan-Meier survival analysis and the Cox-proportional hazards model were employed for survival analyses. Results: The study population included 121 patients with T3(n=76) or T4(n=45) laryngeal cancer with a mean follow-up of 2.9 years. 104(86.0%) patients were treated with curative intent. Of which, 14(11.6%) received radiotherapy, 40(33.1%) received chemoradiotherapy (CRT), 19(15.7%) underwent surgery alone and 31(25.6%) underwent surgery with adjuvant therapy. In the cohort treated with curative intent, the 2-year and 5-year estimated disease-specific survival was 77.9% and 64.1% respectively. CRT had the highest 2-year DSS(92.5%), followed by surgery with adjuvant therapy(81.8%), RT alone(75%) and surgery alone(72.4%). Prognostic factors identified for disease-specific survival included age, tumour subsite and treatment modality. Conclusion: For a centre favouring primary surgery for certain advanced laryngeal cancers, the DSS appears no higher than published literature. The DSS following CRT is encouraging and we postulate that more of our patients may have benefitted from this treatment. To truly enhance survival, future research needs to move away from identifying treatment superiority and focus on precision medicine to define treatment pathways in this disease.

Introduction Paediatric tonsillectomy performed for sleep disordered breathing or recurrent tonsillitis and the effects on a child’s quality of life symptoms while waiting for surgery in an Australian public health system have not previously been investigated. This study investigated parental perceptions of the effects of tonsillectomy on their child’s quality of life while awaiting tonsillectomy and following surgery. Design, Setting and Participants An observational study was undertaken at a tertiary Australian hospital. Parents of paediatric patients (2 to 16 years of age) listed for tonsillectomy completed a validated quality of life questionnaire (T—14 Paediatric Throat Disorders Outcome Test) at the initial consultation, on day of surgery, 6 weeks post-operatively and 6 months post-operatively. T-14 scores were compared using the Related-Samples Wilcoxon Signed Rank Test. Results Parents of 167 children participated in this study. There was a median wait time of 174 days (IQR 108 – 347) from the initial consultation until the day of surgery, with no significant change in median T-14 scores (35 [IQR 22 - 42] vs 36 [IQR 22 - 42]; n= 63; p > 0.05). There was a significant decrease from pre-operative T-14 scores to 6 weeks post-operatively (33.5 [IQR 22 - 42] vs 2 [IQR 0 - 5]; n = 160; p < 0.001), and this was sustained with a minor improvement at 6 months post-operatively (6-week 2 [IQR 0 - 5] vs 6-month 0 [IQR 0 - 2]; n = 148; p < 0.001). Conclusion Paediatric tonsillectomy improves the patient’s quality of life as perceived by their parents with a sustained benefit in the long term. There is no improvement to the patient’s quality of life while awaiting tonsillectomy, thus patient welfare can be improved through reducing waiting times for surgery.

Background Olfactory dysfunction (OD) is a common but underreported problem that can significantly impact a patient’s quality of life. Dysfunction is prevalent in over 5% of the adult population and can be broadly categorised into conductive and sensorineural causes. Magnetic Resonance Imaging (MRI) can form part of the diagnostic work up, although its exact role is often debated. Objectives The aim of this study was to evaluate the value of MRI in managing patients with OD. Design/ Method A retrospective analysis of the records of patients presenting to national smell and taste clinic over a five-year period was performed. Variables included demographics, endoscopic findings, final diagnosis, psychophysical smell test and MRI results. Results A total of 409 patients underwent clinical assessment and smell testing for OD, of which 172 patients (42%) had MRI scans performed. The age range of patients was 10 to 93 years. Imaging in younger age-groups was associated with a higher rate of positive findings, however identifiable causes for OD were recorded across the range. MRI provided both diagnostic and prognostic information in those with idiopathic, traumatic, and congenital causes of OD. For example, MRI provided information on the extent or absence of traumatic gliosis in those with a head trauma history allowing further treatment and prognosis. Conclusion We recommend the adjunct use of MRI in patients with a clear history and examination findings of head injury, congenital cases and in apparent idiopathic cases. MRI should be requested to compliment clinical findings with a view to aiding decision-making on treatment and prognosis independent of patient’s age.

We describe a patient who presented with fatigue and pulling sensation in his lower limbs. He had continuous muscle contractions over his trunk (myokymia) which pointed towards the diagnosis of Isaacs syndrome which was confirmed by strongly positive CASPR2 antibodies in blood.

Multi-omic data integration analyzes a vast amount of biological data and contributes to understanding the biological processes underlying organisms. Multiple machine learning techniques have been proposed to solve this task, including extensions of the joint Non-negative Matrix Factorization (jNMF) method, such as the Multi-project and Multi-profile jNMF (M&M-jNMF). This method jointly factorizes input matrices from two projects into low-rank matrices which have clustering properties. However, the M&M-jNMF method does not capture the non-linear patterns of the data. This paper proposes an extension of the M&M-jNMF approach using projections into high-dimensional spaces through kernel functions; therefore, we propose the M&M-KjNMF method. We compared the standard M&M-jNMF and M&M-KjNMF methods using three different omic profiles of the lung adenocarcinoma data. As M&M-jNMF, we used data from experimental and observational data source. We evaluated the performance of both methods by comparing the cophenetic coefficient, AUC, and biological score. We found that M&M-KjNMF outperforms M&M-jNMF. The new proposed method enables the identification of molecule co-modules enriched in pathways tightly related to lung cancer emergence and progression.

Malignancy of the sphenoid sinus is rare. Tumors may extend to adjacent anatomic structures before detection and may be easily missed. Outcomes are typically poor and vary by tumor type. Clinicians should maintain vigilance for neoplastic disease in patients presenting with headache and ocular/neurological complaints of the face/sinuses.

Takotsubo syndrome is a rare and serious condition, often induced by major physical or psychological stress. Both its diagnosis and treatment could be challenging; herein we describe a complex case of Takotsubo syndrome following mitral valve repair surgery associated with occurrence of systolic anterior motion of the mitral valve , severe mitral regurgitation, consequent right heart failure and its peculiar clinical management.

Background: Ascending aortic aneurysm is a common clinical disease, whereas the aneurysm at the incision of ascending aorta after valve replacement has not been reported. Aims: We report a case of giant ascending aortic incision aneurysm requiring surgical correction after double valve replacement. Materials & Methods: A 45‐year‐old male was referred to our department with dyspneic respiration after exercises for 1+ months, having previously undergone a mitral and aortic valve bivalve replacement 15+ years ago. The parasternal long-axis section of transthoracic echocardiography provided that the diameter of ascending aorta was thickened( 59mm). Computed tomography angiography (CTA) of the aorta showed a localized anterior protrusion aneurysmal of the ascending aorta with a diameter of approximately 69 mm, and the tube wall was severely calcified. Results: Under cardiopulmonary bypass, the large aneurysm was incised and the artificial blood vessels were replaced. The patient achieved an uneventful postoperative recovery with no significant complications. Discussion: Ascending aortic incision aneurysm has the same treatment regimen as ascending aortic aneurysm although it’s extremely rare. Conclusion: Open surgery was indispensable in this case owing to the large aneurysm and the condition liable to rupture.

Background: Pembrolizumab is a humanized IgG4 antibody from the immune-checkpoint inhibitors (ICI) family that has been proven to improve clinical outcomes in many solid organ malignancies. Despite its great therapeutic results, this novel drug has undesirable side effects, including uncommon cardiac and neuromuscular adverse effects. Case presentation: The patient, a known case of hypertension, COPD, HFpEF and NSCLC presented with mild chest pain and shortness of breath on exertion for 5 days. His CT scan revealed no pulmonary emboli. His echocardiogram indicated an EF of 10-15%, worldwide hypokinesis, reduced RV function, and a moderately enlarged left atrium. He underwent coronary angiography, which revealed no obstructive lesions. He was managed with IV Lasix, IV methylprednisolone in hospital and prednisone, furosemide, metoprolol succinate, and lisinopril on discharge. He was prescribed spironolactone at his two-week follow-up. Conclusion: Pembrolizumab-induced cardiomyopathy is uncommon and should be treated with care because there is no cure.

This article reported a case of intestinal tuberculosis in a young patient . ITB could mimic many other diseases like inflammatory bowel diseases (crohn‘s disease ) , abdominal lymphoma and others which make it difficult to differentiate hence many ITB patients could get mis-diagnosed and suffer wrong treatment consequences .

A 56-year-old woman presented with a 2-month history of patulous eustachian tube. She had sudden weight loss after developing a cold, after which she had been experiencing disabling autophony and a sensation of blockage in the ear. She underwent stellate ganglion block in eight months; her symptoms resolved subsequently.