Publications by authors named "Biswajit Sen"

Background: The selection of a local anesthetic for spinal anesthesia (SA) during cesarean sections (CSs) is a crucial clinical decision, with bupivacaine being the most frequently used agent. Nonetheless, ropivacaine has emerged as a viable alternative because of its advantageous safety profile. This study sought to compare the efficacy and safety of hyperbaric ropivacaine (0.

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Background and aims Pneumoperitoneum and extreme Trendelenburg position in laparoscopic surgeries require ventilation at higher peak pressure, potentially resulting in peritubular leak and difficult ventilation. Our study aimed to assess whether a throat pack can provide an adequate seal to prevent peritubular leak around uncuffed tube pediatric laparoscopic surgeries as compared to a Microcuff® tube. Methods This randomized clinical trial was carried out on 94 children aged between eight months and five years undergoing laparoscopic surgery under general anesthesia allocated in two parallel groups using a computer-generated random number.

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Article Synopsis
  • Acute ischemic stroke significantly contributes to global health issues, leading to high rates of illness and death.
  • Early diagnosis and restoration of blood flow are crucial for improving patient outcomes, making timely treatment essential.
  • Recent advancements now include innovative treatments like neuroprotection, stem cell therapy, and AI tools for better diagnosis and management of strokes.
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Obstructive sleep apnea (OSA) is a rapidly increasing global concern. If it remains untreated, it can lead to cardiovascular, metabolic, and psychiatric complications and may result in premature death. The efficient and effective management of OSA can have a beneficial effect and help reduce the financial burden on the health sector.

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A short and efficient catalytic asymmetric protection-free synthesis of dibenzylbutyrolactone lignans, such as (-)-hinokinin, (-)-yatein, (-)-bursehernin, (-)-pluviatolide, and their 7'-hydroxylignans - (7')-parabenzlactone, (7')-hydroxyyatein, (7')-hydroxybursehernin, and (7')-hydroxy pluviatolide, respectively, is described. The syntheses of (+)-isostegane and the formal synthesis of (-)-podophyllotoxin and bicubebins are also described. Organocatalytic aldol-reduction-lactonization and Pd/C-catalyzed hydrogenative debromination are two-pot sequential reactions for the enantioselective synthesis of hydroxybutyrolactone 13b with excellent diastereo- and enantioselectivity (dr 33 : 1 and >99% ee).

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Background: Indacaterol acetate (IND), a long-acting β-agonist in combination with mometasone furoate (MF), an inhaled corticosteroid (ICS), is being explored as a once-daily (od) treatment for asthma in children. This study examined the efficacy, safety, and systemic exposure of IND 75 µg and IND 150 µg in children with persistent asthma.

Methods: In this Phase IIb, multicenter, randomized, double-blind, parallel-group study, pediatric patients (aged ≥ 6 to < 12 years) with persistent asthma were randomized (1:1) to receive either IND 75 µg od or IND 150 µg od via Breezhaler in combination with ICS background therapy.

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The first asymmetric total synthesis of (+)-propolisbenzofuran B is accomplished in 11 steps with an overall yield of 11.9%. The key steps are tandem deacetylative Sonogashira coupling-annulation reaction to synthesize the 2-substituted benzofuran core, stereoselective syn-aldol reaction and Friedel-Crafts cyclization to install the desired stereocenters & third-ring, and Stille coupling for -acetylation.

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The reductive Heck cyclization of nonracemic benzylidene γ-butyrolactone is studied toward the asymmetric synthesis of aryltetralin lignans, where the stereochemistry of the benzylidene lactone is found to control the mode of cyclization. The -isomer undergoes mostly 6-endo-cyclization and provides the desired (-)-isopodophyllotoxin along with a minor amount of 5-exo-cyclized product, but the -isomer goes through exclusively 5-exo-cyclization, leading to the undesired dihydroindenolactone compound instead of (-)-podophyllotoxin. The experimental results are well-supported by the DFT studies.

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Background: Global initiative for asthma (GINA) 2019 recommends adding a long-acting β-agonist (LABA) to an inhaled corticosteroid (ICS) as a maintenance controller therapy in patients with inadequately controlled asthma. Indacaterol acetate (IND, a LABA) in combination with mometasone furoate (MF, an ICS) is under development for the treatment of these patients.

Objective: This phase III QUARTZ was a multicentre, randomised, double-blind, double-dummy and parallel-group study to assess the efficacy and safety of low-dose IND/MF 150/80 μg once daily (o.

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Purpose: To compare the efficacy and safety of two long-acting dual bronchodilator combinations: indacaterol/glycopyrrolate (IND/GLY) versus umeclidinium/vilanterol (UMEC/VI).

Methods: Studies A2349 and A2350 were replicate, randomized, double-blind, double-dummy, active-controlled, cross-over studies in patients with moderate-to-severe COPD. Patients were randomized to sequential 12-week treatments of twice-daily IND/GLY 27.

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We report here the first case of disseminated Emmonsia pasteuriana infection in a patient with AIDS in India. The patient presented with weight loss, dyspnoea, left-sided chest pain and multiple non-tender skin lesions over face and body for 3 months. Disseminated emmonsiosis was diagnosed on microscopic examination and fungal culture of skin biopsy and needle aspirate of lung consolidation.

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