Measurement-Based Quantum Thermal Machines with Feedback Control.

We investigated coupled-qubit-based thermal machines powered by quantum measurements and feedback. We considered two different versions of the machine: (1) a quantum Maxwell's demon, where the coupled-qubit system is connected to a detachable single shared bath, and (2) a measurement-assisted refrigerator, where the coupled-qubit system is in contact with a hot and cold bath. In the quantum Maxwell's demon case, we discuss both discrete and continuous measurements. We found that the power output from a single qubit-based device can be improved by coupling it to the second qubit. We further found that the simultaneous measurement of both qubits can produce higher net heat extraction compared to two setups operated in parallel where only single-qubit measurements are performed. In the refrigerator case, we used continuous measurement and unitary operations to power the coupled-qubit-based refrigerator. We found that the cooling power of a refrigerator operated with swap operations can be enhanced by performing suitable measurements.

Study to Assess Level of Preoperative Anxiety in Patients Scheduled for Surgery.

BACKGROUND: Pre-operative anxiety is unpleasant state of tension or uneasiness that results from patient doubt and fear before an operation. This study aims at assessing level of state and trait anxiety and other associated factors among preoperative patient. METHODS: A descriptive cross-sectional study was done among 195 patients above 18 years of age planned for elective surgery the following day in different departments in tertiary care center. State and Trait Anxiety Inventory and self-designed semi structured pro-forma was used to assess anxiety and patient particulars respectively. RESULTS: There were 195 patients in study among which 93(47.7%) underwent major surgery and 102 (52.3%) underwent minor surgery. The mean State Anxiety Score was 45.89±12.502. The mean Trait Anxiety Score was 43.17±9.342. State and Trait anxiety differed significantly in male and female patients. Trait Anxiety was associated with education and marital status. CONCLUSIONS: There was no significant difference in anxiety level in patient undergoing major and minor surgery. Male and female patients differed significantly in both State and Trait Anxiety.

Post-COVID syndrome: A prospective study in a tertiary hospital of Nepal.

INTRODUCTION: The post-coronavirus disease 2019 (COVID-19) syndrome is defined as the persistence of symptoms after viral clearance and the emergence of new symptoms after a few months following recovery from COVID-19. This study aimed to assess the prevalence of post-COVID-19 syndrome and the risk factors that contribute to its development. METHODS: This study was conducted prospectively in Tribhuvan University Teaching Hospital (TUTH), located in Maharajgunj, Kathmandu. The patients were followed up for three months. RESULTS: The post-COVID status of 300 patients admitted to the COVID emergency of TUTH was studied. The mean age of the patients was 46.6±15.7 years, and the proportion of male (56%) was slightly higher than female (44%). Most of the patients (81.7%) had fever on their presentation to the emergency which was followed by fatigue (81.3%) and cough (78.3%). During the post-COVID phase, fatigue was the most common persistent symptom, with 34% experiencing fatigue after 60 days and 28.3% even after 90 days from the onset of symptoms. Univariate logistic regression showed sore throat (OR 4.6; 95% CI (2.8-7.6)), rhinitis (OR 3.6; 95% CI (2.1-5.9)), fatigue (OR 3.7; 95% CI (1.8-7.6)), diarrhea (OR 4.1; 95% CI (2.4-6.9)), anosmia (OR 6.7; 95% CI (3.9-11.3)), ageusia (OR 7.8; 95% CI (4.5-13.4)) and shortness of breath (OR 14.9; 95% CI (1.8-119.6)) at admission were all predictors of post-COVID syndrome after three months. CONCLUSION: Even after recovering from COVID-19, people with COVID-19 may develop symptoms. As a result, COVID-19's long-term consequences should not be neglected, as they may lead to increased morbidity among patients, consumption of financial resources, and added burden on the health system.

Patient with Dravet syndrome: A case report.

Dravet syndrome is rare genetic epilepsy syndrome and epileptic encephalopathy. The patient initially has normal developmental profile with plateau or regression that begins after seizure onset. We report a case of two-year-old child diagnosed as dravet syndrome with moderate cerebral atrophy and ventricular dilatation as rare MRI finding.

Scrub Typhus among Febrile Children in a Tertiary Care Center of Central Nepal: A Descriptive Cross-sectional Study.

INTRODUCTION: Scrub typhus is a mite borne infectious disease caused by Orientia tsutsugamushi, obligate intracellular bacteria, transmitted by chigger mites. Scrub typhus is an emerging febrile illness with clinical suspicion being the only key to diagnosis. This study was conducted to find out the prevalence of Scrub typhus among febrile children in a tertiary care center of central Nepal. METHODS: A descriptive cross-sectional study was conducted from January 2018 to December 2019 in the pediatric inpatients of a tertiary care hospital after obtaining ethical clearance from Institutional Review Committee of Institute (Reference number 2020-105). Convenient sampling method was used. Data was analyzed using Statistical Packages for the Social Science version 16. Point estimate at 95% Confidence Interval was calculated along with frequency and proportion for binary data. RESULTS: Out of 1024 febrile patients, prevalence of scrub typhus among febrile children was 55 (5.37%) (3.66-7.08 at 90% Confidence Interval). Of 55 patients, mean age was 9.2 years with 52 (94.6%) of cases diagnosed between July to November. Among 55 patients, other symptoms were vomiting 33 (60%), headache 22 (40%), abdominal pain 19 (34.5%), cough 15 (27.3%), nausea (25.5%), seizure 11 (20 %), and dyspnea 6 (10.9%). Major clinical signs was lymphadenopathy 29 (52.7%). Major complication noted was meningitis 11 (20%). CONCLUSIONS: The prevalence of scrub typhus is considerably high during July to November so it should be considered as a differential diagnosis of fever particularly in this period.

Clinical Profile of COVID-19 Patients Admitted in a COVID Designated Hospital.

BACKGROUND: Pandemic of COVID-19 has engulfed Nepal as well. In this paper, we studied the demographic, clinical, laboratory findings as well as the treatment modalities, prognostic factors and outcome of patients admitted with COVID-19. METHODS: This was an observational cross-sectional study that included all patients admitted to the General Medicine Department of College of Medical Sciences, Bharatpur, during the first wave of COVID-19 from April 2020 to February 2021 after obtaining the ethical clearance. Data analysis was done using statistical packages for social sciences version 16. RESULTS: A total of 119 patients with mean age of 61.5 years were admitted. They had a mean duration of onset of symptoms of 7.1 days. Commonest symptoms were fever (70.6%), cough (67.2%) and dyspnea (64.7%). Severe COVID-19 at admission with a median CT severity score of 15 was found in 49.7% of them. Total 83.2% patients required ICU care and 10.9% required mechanical ventilation. ARDS and secondary infection occurred in 17.6% each. Median length of hospital stay was 6 days. In total, 56.3% recovered 27.7% left against medical advice and 16.0% expired. Severity of COVID at admission, CT severity score at presentation and D-dimer at admission were found to be significantly associated with mortality (P<0.05).Neither of the age, duration of illness, CRP at admission nor the use of remdesivir or convalescent plasma had significant relation with the mortality (P>0.05). CONCLUSIONS: Severity of illness at presentation, CT severity score and D-dimer level at admission are significantly associated with mortality of the patients admitted with COVID-19.

Southeast Asian Pharmacogenomics Research Network (SEAPharm): Current Status and Perspectives.

Pharmacogenomics (PGx) is increasingly being recognized as a potential tool for improving the efficacy and safety of drug therapy. Therefore, several efforts have been undertaken globally to facilitate the implementation process of PGx into routine clinical practice. Part of these efforts include the formation of PGx working groups working on PGx research, synthesis, and dissemination of PGx data and creation of PGx implementation strategies. In Asia, the Southeast Asian Pharmacogenomics Research Network (SEAPharm) is established to enable and strengthen PGx research among the various PGx communities within but not limited to countries in SEA; with the ultimate goal to support PGx implementation in the region. From the perspective of SEAPharm member countries, there are several key elements essential for PGx implementation at the national level. They include pharmacovigilance database, PGx research, health economics research, dedicated laboratory to support PGx testing for both research and clinical use, structured PGx education, and supportive national health policy. The status of these essential elements is presented here to provide a broad picture of the readiness for PGx implementation among the SEAPharm member countries, and to strengthen the PGx research network and practice in this region.

Optimal Probabilistic Work Extraction beyond the Free Energy Difference with a Single-Electron Device.

We experimentally realize protocols that allow us to extract work beyond the free energy difference from a single-electron transistor at the single thermodynamic trajectory level. With two carefully designed out-of-equilibrium driving cycles featuring kicks of the control parameter, we demonstrate work extraction up to large fractions of k_{B}T or with probabilities substantially greater than 1/2, despite the zero free energy difference over the cycle. Our results are explained in the framework of nonequilibrium fluctuation relations. We thus show that irreversibility can be used as a resource for optimal work extraction even in the absence of feedback from an external operator.