Publications by authors named "Komarek A"

Objectives: This study aimed to evaluate whether minimum-intensity projection (MinIP) images could predict complications in CT-guided lung biopsies.

Methods: We retrospectively analyzed 72 procedures from January 2019 to December 2023, categorizing patients by pneumothorax and the severity of hemorrhage (grade 2 or higher). Radiodensity measurements were performed using lung window (LW) and MinIP (10-mm slab) images.

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In many countries worldwide, NO emissions currently decrease as a result of pollution control, while NH emissions stagnate or continue to increase. Little is known about horizontal deposition of NO and NH, the oxidation/neutralization products of these primary pollutants. To close the knowledge gap, we studied atmospheric inputs of NO and NH at two mountain-top sites near the Czech-German-Polish borders during winter.

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Background/objectives: This study aimed to investigate pneumothorax risk, focusing on the gravitational effect of pleural pressure caused by specific patient positioning.

Methods: We retrospectively analyzed 144 percutaneous CT-guided lung biopsies performed between January 2019 and December 2023. Patients were grouped into those with or without pneumothorax.

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Background: This study investigated and compared the efficacy, safety, radiation exposure, and financial compensation of two modalities for percutaneous radiologic gastrostomy (PRG): multislice computed tomography biopsy mode (MS-CT BM)-guided and fluoroscopy-guided (FPRG). The aim was to provide insights into optimizing radiologically assisted gastrostomy procedures.

Methods: We conducted a retrospective analysis of PRG procedures performed at a single center from January 2018 to January 2024.

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Article Synopsis
  • A Bayesian meta-analysis was conducted to evaluate the effectiveness of extracorporeal cardiopulmonary resuscitation (ECPR) compared to conventional CPR in patients who had a cardiac arrest outside of the hospital, focusing on neurological outcomes after 6 months.
  • The analysis included data from three randomized trials, with ECPR involving 209 patients and conventional CPR involving 211 patients, and aimed to clarify the probability of clinically significant treatment effects rather than relying solely on p-values.
  • Results showed that ECPR had a median relative risk of 1.47 for neurologically favorable survival in all rhythms and 1.54 for patients with shockable rhythms, indicating a potential benefit, but with wide credible intervals suggesting uncertainty
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  • Nutrient imbalances in forests, especially when combined with stressors like drought and bark beetles, can harm their health; this study focuses on the sources of essential minerals (Mg, Ca, Sr) in a Carpathian catchment area.
  • *Using isotope composition analysis of various ecosystem compartments, researchers found that the annual export of these minerals significantly exceeded atmospheric inputs, indicating substantial leaching from local bedrock.
  • *Interestingly, the isotope ratios of the runoff closely resembled those of atmospheric deposition and soil water, but differed from the bedrock, suggesting that the bedrock is not the main source of these minerals, potentially pointing to a mixing of different sources.*
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Background To evaluate long-term outcome of tetralogy of Fallot repair analyzing an unbiased country-wide surgically treated population with tetralogy of Fallot. Methods and Results Retrospective analysis of consecutive patients aged <18 years who underwent tetralogy of Fallot repair at a single nationwide pediatric cardiac center. Death from any cause and need for surgical or catheter reintervention were the study end points.

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Electronic nematicity has been found in a wide range of strongly correlated electron materials, resulting in the electronic states having-4.5pc]Please note that the spelling of the following author name(s) in the manuscript differs from the spelling provided in the article metadata: Izidor Benedičič. The spelling provided in the manuscript has been retained; please confirm.

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China has reconfigured the global value chains of a wide range of commodities. This includes carrageenan, a polysaccharide extracted from specific types of red seaweeds used as a gelling and thickening agent in a wide range of applications. In the past 20 years, China has moved to centre stage in the global carrageenan processing sector, with wide-ranging implications for seaweed producing nations and farmers.

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Understanding the driving mechanisms behind metal-insulator transitions (MITs) is a critical step toward controlling material's properties. Since the proposal of charge order-induced MIT in magnetite FeO in 1939 by Verwey, the nature of the charge order and its role in the transition have remained elusive. Recently, a trimeron order was found in the low-temperature structure of FeO; however, the expected transition entropy change in forming trimeron is greater than the observed value, which arises a reexamination of the ground state in the high-temperature phase.

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Reticular basement membrane (RBM) thickening may occur in children with allergic bronchial asthma (BA), cystic fibrosis (CF), and primary ciliary dyskinesia (PCD). Its functional consequences remain unknown. We investigated the relationship between baseline RBM thickness and subsequent spirometry.

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Tanzania's dairy sector is poorly developed, creating reliance on imports for processed, value-added dairy products and threatening food security, particularly when supply chains are disrupted due to market volatility or armed conflicts. The Tanzanian Dairy Development Roadmap is a domestic development initiative that aims to achieve dairy self-sufficiency by 2030. Here, we model different outcomes of the roadmap, finding that adoption of high-yield cattle breeds is essential for reducing dairy import dependency.

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Designing efficient catalyst for the oxygen evolution reaction (OER) is of importance for energy conversion devices. The anionic redox allows formation of O-O bonds and offers higher OER activity than the conventional metal sites. Here, we successfully prepare LiNiO with a dominant 3dL configuration (L is a hole at O 2p) under high oxygen pressure, and achieve a double ligand holes 3dL under OER since one electron removal occurs at O 2p orbitals for Ni oxides.

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Nitrogen (N) deposition, a key process of atmospheric self-cleaning, represents an important pathway for nutrients and pollutants to ecosystems. Enhanced N deposition flux contributes to acidification, eutrophication and loss of biodiversity. N-NO concentrations in rime and snow were measured at 10 Czech plots situated in borderline mountains in 2009-2011 winters.

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This study investigates the financial cost of increasing the diversity of cereal grains in livestock feed rations. We first develop a nonlinear mathematical programming model that determines the least-cost composition of livestock feed rations of one metric ton that have at least the same energy and nutrient content as a reference feed ration. We then add into the model a diversity constraint using the Simpson Index of diversity to examine how changes in the diversity of the commodities in the ration affect the cost of the ration while maintaining the ration's energy and nutrient content at a reference ration value.

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Background: Survival rates in refractory out-of-hospital cardiac arrest (OHCA) remain low with conventional advanced cardiac life support (ACLS). Extracorporeal life support (ECLS) implantation during ongoing resuscitation, a method called extracorporeal cardiopulmonary resuscitation (ECPR), may increase survival. This study examined whether ECPR is associated with improved outcomes.

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The phenomenology and radical changes seen in material properties traversing a quantum phase transition have captivated condensed matter research over the past decades. Strong electronic correlations lead to exotic electronic ground states, including magnetic order, nematicity, and unconventional superconductivity. Providing a microscopic model for these requires detailed knowledge of the electronic structure in the vicinity of the Fermi energy, promising a complete understanding of the physics of the quantum critical point.

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Article Synopsis
  • The paper discusses the development of C4, a theory-driven strategy designed to enhance PrEP (pre-exposure prophylaxis) use among Black men who have sex with men (MSM) by addressing cultural and systemic barriers to HIV prevention.
  • C4 combines self-determination theory with comprehensive risk counseling and an anti-racism perspective, showing promising results in a study with 225 participants across three US cities from 2014-2017, where PrEP use reached 79% and retention was at 92%.
  • The findings suggest that C4 effectively supports both individual motivations and the healthcare environments that service Black MSM, making it a valuable model for public health policy aimed at improving PrEP uptake and retention while promoting
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Objectives: To describe the short- and medium-term repeatability of lung clearance index at 2.5% (LCI ) in infants and calculate the number of patients needed to enroll in a study (N) using LCI as a primary outcome.

Methods: An 8-month follow-up observational study was employed for assessing short-term [coefficient of repeatability (CR) and intraclass correlation (ICC)] and medium-term repeatability (Bland-Altman method) of LCI in infants with cystic fibrosis (CF) or recurrent wheeze (RW) measured by the nitrogen multiple-breath washout test (N -MBW).

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  • The study investigates the impact of gender on outcomes after out-of-hospital cardiac arrest (OHCA) in patients admitted to a cardiac arrest center, revealing mixed results in previous research.
  • A total of 932 patients were analyzed, with women being older, less likely to have a shockable rhythm, and receiving different treatments compared to men, leading to lower survival and neurological outcomes for women.
  • Despite initial observations of worse outcomes for women, the logistic regression analysis indicated that gender did not significantly influence survival or neurological outcomes when adjusted for other factors.
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  • Out-of-hospital cardiac arrest (OHCA) has a low survival rate, and the effectiveness of an early invasive treatment approach compared to standard care is unclear.
  • A randomized clinical trial in Prague involved 256 adults with OHCA to assess whether an invasive strategy improves neurologically favorable survival at 180 days.
  • The trial was halted early for futility, showing that 31.5% of the invasive group had a good neurologic outcome compared to 22.0% in the standard care group.
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