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Pulmonary comets

Alberto Palazzuoli, Gaetano Ruocco, Matteo Beltrami, Ranuccio Nuti, John G Cleland
BACKGROUND: Lung ultrasound (LUS) can be used to assess pulmonary congestion by imaging B-lines ('comets') for patients with acute heart failure (AHF). OBJECTIVES: Investigate relationship of B-lines, plasma concentrations of B-type natriuretic peptide (BNP), and echocardiographic left ventricular (LV) function measured at admission and discharge and their relationship to prognosis for AHF with preserved (HFpEF) or reduced (HFrEF) LV ejection fraction. METHODS: Patients with AHF had the above tests done at admission and discharge...
March 12, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Hong Li, Yi-Dan Li, Wei-Wei Zhu, Ling-Yun Kong, Xiao-Guang Ye, Qi-Zhe Cai, Lan-Lan Sun, Xiu-Zhang Lu
Ultrasound lung comets (ULCs) are a nonionizing bedside approach to assess extravascular lung water. We evaluated a protocol for grading ULC score to estimate pulmonary congestion in heart failure patients and investigated clinical and echocardiographic correlates of the ULC score. Ninety-three patients with congestive heart failure, admitted to the emergency department, underwent pulmonary ultrasound and echocardiography. A ULC score was obtained by summing the ULC scores of 7 zones of anterolateral chest scans...
2018: BioMed Research International
Douglas L Miller, Zhihong Dong, Chunyan Dou, Krishnan Raghavendran
OBJECTIVES: Pulmonary diagnostic ultrasound (US) can induce pulmonary capillary hemorrhage (PCH) in mammals. This singular biological effect of diagnostic US imaging was discovered more than 25 years ago but remains poorly understood. Our objective here was to investigate rapid infusion of intravenous fluids as a possible stressor for capillaries, which might enhance pulmonary diagnostic US-induced PCH. METHODS: Rats were anesthetized with Telazol (Zoetis, Inc, Kalamazoo, MI), which yielded relatively low pulmonary diagnostic US-induced PCH, or Telazol and xylazine, which yielded relatively high pulmonary diagnostic US-induced PCH...
February 9, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Z L Wang, J Y Liu, C J Zhou, M B Wang, H Y Wang, Y Xu
Objective: To investigate the risk factors of ultrasound lung comets and its impact on the survivals of patients undergoing hemodialysis. Methods: One hundred and forty-two patients on hemodialysis (Male 76, female 66) were divided into three groups according to the score of lung comets (mild: ≤14 comets; moderate: 15 to 30 comets; severe: >30 comets). Seventy-two healthy subjects examined by lung ultrasound serve as a control. Pulmonary artery systolic pressure and left ventricular ejection fraction (LVEF) were assessed by Doppler ultrasonography...
December 26, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Niels Hadrup, Stefan Bengtson, Nicklas R Jacobsen, Petra Jackson, Marek Nocun, Anne T Saber, Keld A Jensen, Håkan Wallin, Ulla Vogel
Intratracheal instillation serves as a model for inhalation exposure. However, for this, materials are dispersed in appropriate media that may influence toxicity. We tested whether different intratracheal instillation dispersion media influence the pulmonary toxicity of different nanomaterials. Rodents were intratracheally instilled with 162 µg/mouse/1620 µg/rat carbon black (CB), 67 µg/mouse titanium dioxide nanoparticles (TiO2) or 54 µg/mouse carbon nanotubes (CNT). The dispersion media were as follows: water (CB, TiO2); 2% serum in water (CB, CNT, TiO2); 0...
December 30, 2017: Mutagenesis
Olivier Castagna, Jacques Regnard, Emmanuel Gempp, Pierre Louge, François Xavier Brocq, Bruno Schmid, Anne-Virginie Desruelle, Valentin Crunel, Adrien Maurin, Romain Chopard, David Hunter MacIver
BACKGROUND: Immersion pulmonary edema is potentially a catastrophic condition; however, the pathophysiological mechanisms are ill-defined. This study assessed the individual and combined effects of exertion and negative pressure breathing on the cardiovascular system during the development of pulmonary edema in SCUBA divers. METHODS: Sixteen male professional SCUBA divers performed four SCUBA dives in a freshwater pool at 1 m depth while breathing air at either a positive or negative pressure both at rest or with exercise...
January 3, 2018: Sports Medicine—Open
Justyna Modrzynska, Trine Berthing, Gitte Ravn-Haren, Nicklas Raun Jacobsen, Ingrid Konow Weydahl, Katrin Loeschner, Alicja Mortensen, Anne Thoustrup Saber, Ulla Vogel
BACKGROUND: Little is known about the mechanism underlying the genotoxicity observed in the liver following pulmonary exposure to carbon black (CB) nanoparticles (NPs). The genotoxicity could be caused by the presence of translocated particles or by circulating inflammatory mediators released during pulmonary inflammation and acute-phase response. To address this, we evaluated induction of pulmonary inflammation, pulmonary and hepatic acute-phase response and genotoxicity following exposure to titanium dioxide (TiO2), cerium oxide (CeO2) or CB NPs...
January 3, 2018: Particle and Fibre Toxicology
Abderrahim Nemmar, Turan Karaca, Sumaya Beegam, Priya Yuvaraju, Javed Yasin, Badreldin H Ali
It is well-established that there is a crosstalk between the lung and the kidney, and several studies have reported association between chronic kidney disease (CKD) and pulmonary pathophysiological changes. Experimentally, CKD can be caused in mice by dietary intake of adenine. Nevertheless, the consequence of such intervention on the lung received only scant attention. Here, we assessed the pulmonary effects of adenine (0.2% w/w in feed for 4 weeks)-induced CKD in mice by assessing various physiological histological and biochemical endpoints...
2017: Frontiers in Physiology
Manuel Rubio-Rivas, Xavier Corbella, Melany Pestaña-Fernández, Carles Tolosa-Vilella, Alfredo Guillen-Del Castillo, Dolores Colunga-Argüelles, Luis Trapiella-Martínez, Nerea Iniesta-Arandia, María Jesús Castillo-Palma, Luis Sáez-Comet, María Victoria Egurbide-Arberas, Norberto Ortego-Centeno, Mayka Freire, Jose Antonio Vargas-Hitos, Juan José Ríos-Blanco, Jose Antonio Todolí-Parra, Mónica Rodríguez-Carballeira, Adela Marín-Ballvé, Pablo Segovia-Alonso, Xavier Pla-Salas, Ana Belén Madroñero-Vuelta, Manuel Ruiz-Muñoz, Vicent Fonollosa-Pla, Carmen Pilar Simeón-Aznar, E Callejas Moraga, E Calvo, C Carbonell, M J Castillo, A J Chamorro, D Colunga, X Corbella, M V Egurbide, G Espinosa, V Fonollosa, M Freire, F J García Hernández, R González León, A Guillén Del Castillo, N Iniesta, R Lorenzo, A B Madroñero, B Marí, A Marín, N Ortego-Centeno, M Pérez Conesa, M Pestaña, X Pla, J J Ríos Blanco, M Rodríguez Carballeira, M Rubio Rivas, M Ruiz Muñoz, L Sáez Comet, P Segovia, C P Simeón, A Soto, E Tarí, J A Todolí, C Tolosa, L Trapiella, J A Vargas Hitos, G Verdejo
The objective of the study is to determine the importance of the mode of onset as prognostic factor in systemic sclerosis (SSc). Data were collected from the Spanish Scleroderma Registry (RESCLE), a nationwide retrospective multicenter database created in 2006. As first symptom, we included Raynaud's phenomenon (RP), cutaneous sclerosis, arthralgia/arthritis, puffy hands, interstitial lung disease (ILD), pulmonary arterial hypertension (PAH), and digestive hypomotility. A total of 1625 patients were recruited...
December 7, 2017: Clinical Rheumatology
Mariko Asano, Hiroyuki Watanabe, Kazuhiro Sato, Yuji Okuda, Sho Sakamoto, Yukiyasu Hasegawa, Kazuhisa Sudo, Masahide Takeda, Masaaki Sano, Satoshi Kibira, Hiroshi Ito
OBJECTIVES: Ultrasound (US) lung comets are often observed in patients with interstitial lung disease or congestive heart failure, but few studies have explored the clinical importance of US lung comets in patients with the former condition. We explored whether the US lung comet number could be used to assess the severity of interstitial pneumonia. METHODS: Forty stable patients with interstitial pneumonia were examined. Lung comets evident on transthoracic US imaging in 12 selected regions of the posterior chest wall were analyzed...
November 30, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Kazumasa Honda, Masato Naya, Hiroshi Takehara, Hiromichi Kataura, Katsuhide Fujita, Makoto Ema
We compared long-term pulmonary toxicities after a single intratracheal instillation of two types of dispersed single-wall carbon nanotubes (SWCNTs), namely, those with relatively long or short linear shapes with average lengths of 8.6 and 0.55 µm, respectively. Both types of SWCNTs were instilled intratracheally in male F344 rats at 0.2 or 1.0 mg/kg (long SWCNTs) or 1.0 mg/kg (short SWCNTs). Pulmonary responses were characterized at 26, 52 and 104 weeks after a single instillation. Inflammatory changes, test substance deposition, test substance engulfment by macrophages, and alveolar wall fibrosis were observed in the lungs of almost all test rats at 52 and 104 weeks after short nanotube instillation...
November 7, 2017: Inhalation Toxicology
Luna Rahman, Nicklas Raun Jacobsen, Syed Abdul Aziz, Dongmei Wu, Andrew Williams, Carole L Yauk, Paul White, Hakan Wallin, Ulla Vogel, Sabina Halappanavar
The International Agency for Research on Cancer has classified one type of multi-walled carbon nanotubes (MWCNTs) as possibly carcinogenic to humans. However, the underlying mechanisms of MWCNT- induced carcinogenicity are not known. In this study, the genotoxic, mutagenic, inflammatory, and fibrotic potential of MWCNTs were investigated. Muta™Mouse adult females were exposed to 36±6 or 109±18μg/mouse of Mitsui-7, or 26±2 or 78±5μg/mouse of NM-401, once a week for four consecutive weeks via intratracheal instillations, alongside vehicle-treated controls...
November 2017: Mutation Research
A Boussuges, K Ayme, G Chaumet, E Albier, M Borgnetta, O Gavarry
BACKGROUND: The risk factors of pulmonary edema induced by diving in healthy subjects are not well known. The aim of the present study was to assess the parameters contributing to the increase in extravascular lung water after diving. METHODS: This study was carried out in a professional diving institute. All divers participating in the teaching program from June 2012 to June 2014 were included in the study. Extravascular lung water was assessed using the detection of ultrasound lung comets (ULC) by chest ultrasonography...
October 3, 2017: Sports Medicine—Open
Xiaowei Qian, Qiong Hu, Hang Zhao, Bo Meng, Yang Nan, Hong Cao, Qingquan Lian, Jun Li
BACKGROUND: During facemask ventilation, gastric insufflation is defined as appearance of a comet-tail or an acoustic shadow on ultrasonography. Ultrasonographic measurement of antral cross-section area (CSA) may reflect an insufflated antrum and provide interesting semi-quantitative data in regard to the gastric insufflation. This study aimed to determine the appropriate level of inspiratory pressure sufficient to provide adequate pulmonary ventilation with a lower occurrence of gastric insufflation during facemask pressure-controlled ventilation using real-time ultrasonography in paralyzed children...
September 11, 2017: BMC Anesthesiology
Pål Magnusson, Michał Oczkowski, Johan Øvrevik, Malgorzata Gajewska, Jacek Wilczak, Jacek Biedrzycki, Katarzyna Dziendzikowska, Dariusz Kamola, Tomasz Królikowski, Marcin Kruszewski, Anna Lankoff, Remigiusz Mruk, Gunnar Brunborg, Christine Instanes, Joanna Gromadzka-Ostrowska, Oddvar Myhre
Increased use of biofuels raises concerns about health effects of new emissions. We analyzed relative lung health effects, on Fisher 344 rats, of diesel engine exhausts emissions (DEE) from a Euro 5-classified diesel engine running on petrodiesel fuel containing 20% rapeseed methyl esters (B20) with and without diesel particulate filter (DPF). One group of animals was exposed to DEE for 7 days (6 h/day), and another group for 28 days (6 h/day, 5 days/week), both with and without DPF. The animals (n = 7/treatment) were exposed in whole body exposure chambers...
April 2017: Inhalation Toxicology
Katarzyna Skórkowska-Telichowska, Anna Kulma, Tomasz Gębarowski, Wioleta Wojtasik, Kamil Kostyn, Helena Moreira, Anna Szyjka, Aleksandra Boba, Marta Preisner, Justyna Mierziak, Malgorzata Arendt, Anna Kostyn, Michał Szatkowski, Jan Szopa, Kazimierz Gąsiorowski
Chinese hamster pulmonary fibroblasts (V79 cells) pre-treated with flax fabrics derived from non-modified or genetically engineered flax fibres and treated with H2O2 revealed a markedly lower level of intracellular reactive oxygen species (ROS) than control, non-pre-treated cells. The fabrics were prepared from fibres derived from two kinds of transgenic plants: W92 plants, which overproduce flavonoids, and M type plants, which produce hydroxybutyrate polymer in their vascular bundles and thus in fibres. Incubating the V79 cells with the flax fabrics prior to H2O2 treatment also reduced the amount of DNA damage, as established using the comet assay (also known as alkaline single-cell gel electrophoresis) and pulsed-field electrophoresis of intact cellular DNA...
July 8, 2017: Applied Biochemistry and Biotechnology
Jonathan A Galli, Nicholas L Panetta, Nathaniel Gaeckle, Fernando J Martinez, Bethany Moore, Thomas Moore, Anthony Courey, Kevin Flaherty, Gerard J Criner
PURPOSE: Some patients with diffuse interstitial lung disease (ILD) undergo bronchoscopy with transbronchial biopsy (TBB) as part of their diagnostic evaluation. It is unclear what the incidence and risk factors for pneumothorax (PTX) following TBB are in this patient population. METHODS: Ninety-seven subjects with pulmonary fibrosis who underwent a research bronchoscopy with TBB as part of the multicenter correlating outcomes with biochemical markers to estimate time-progression in idiopathic pulmonary fibrosis (COMET) trial were retrospectively reviewed...
October 2017: Lung
Zora Susilovic-Grabovac, Cristina Banfi, Denise Brusoni, Massimo Mapelli, Stefania Ghilardi, Ante Obad, Darija Bakovic-Kramaric, Zeljko Dujic, Piergiuseppe Agostoni
Alteration of breathing pattern ranging from an increase of respiratory rate to overt hyperventilation during and after SCUBA diving is frequently reported and is associated with intrathoracic fluid overload. This study was undertaken to assess breathing efficiency after diving and the association with damage of alveolar cells. Ventilation efficiency (VE/VCO2) during maximal cardiopulmonary exercise test (CPET) before and 2h after a standard protocol dive has been analyzed in twelve professional males divers (39...
September 2017: Respiratory Physiology & Neurobiology
Astrid Skovmand, Ana Cecilia Damiao Gouveia, Ismo Kalevi Koponen, Peter Møller, Steffen Loft, Martin Roursgaard
Candle burning produces a large amount of particles that contribute substantially to the exposure to indoor particulate matter. The exposures to various types of combustion particles, such as diesel exhaust particles, have been associated with increased risk of lung cancer by mechanisms that involve oxidative stress, inflammation and genotoxicity. The aim of this study was to compare pulmonary effects of candle light combustion particles (CP) with two benchmark diesel exhaust particles (A-DEP and SRM2975). Intratracheal (i...
July 5, 2017: Toxicology Letters
Abderrahim Nemmar, Priya Yuvaraju, Sumaya Beegam, Mohamed A Fahim, Badreldin H Ali
CeO2 nanoparticles (CeO2 NPs) which are used as a diesel fuel additive are emitted in the particulate phase in the exhaust, posing a health concern. However, limited information exists regarding the in vivo acute toxicity of CeO2 NPs on multiple organs. Presently, we investigated the acute (24 h) effects of intratracheally instilled CeO2 NPs in mice (0.5 mg/kg) on oxidative stress, inflammation, and DNA damage in major organs including lung, heart, liver, kidneys, spleen, and brain. Lipid peroxidation measured by malondialdehyde production was increased in the lungs only, and reactive oxygen species were increased in the lung, heart, kidney, and brain...
2017: Oxidative Medicine and Cellular Longevity
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