Extracorporeal support for pulmonary resection: current indications and results.

Extracorporeal assistances are exponentially used for patients, with acute severe but reversible heart or lung failure, to provide more prolonged support to bridge patients to heart and/or lung transplantation. However, experience of use of extracorporeal assistance for pulmonary resection is limited outside lung transplantation. Airways management with standard mechanical ventilation system may be challenging particularly in case of anatomical reasons (single lung), presence of respiratory failure (ARDS), or complex tracheo-bronchial resection and reconstruction. Based on the growing experience during lung transplantation, more and more surgeons are now using such devices to achieve good oxygenation and hemodynamic support during such challenging cases. We review the different extracorporeal device and attempt to clarify the current practice and indications of extracorporeal support during pulmonary resection

Isotherm, Kinetic, and Selectivity Studies for the Removal of Ba-133 and Cs-137 from Aqueous Solution Using Turkish Perlite

The efficiency of Ba-133 and Cs-137 removal from aqueous solution is vital to mitigate ecological concerns over spreading these radionuclides in the environment. The present work focused on the use of Turkish perlite for the sorptive removal of Ba-133 and Cs-137 from aqueous solution by the radioindicator method. Perlite was characterized by XRF, XRD, FTIR, SEM-EDX, and BET analyses. The maximum percentage removals of 88.2% and 78.7% were obtained for Ba-133 and Cs-137 at pH 6 and pH 9, respectively. For both ions, the sorption equilibrium was attained relatively rapidly. Experimental kinetic data were well described with pseudo-second-order and intraparticle diffusion models. The uptake of both ions increased with the increase in metal concentration (1 x 10(-5) to 5 x 10(-2) mol/L) in solution. The maximum uptake capacities of Ba-133 and Cs-137 were found to be 1.96 and 2.11 mmol/g, respectively. The effect of competing ions decreased in the order of Ca2+ > K+ > Ni2+ > Na+ for Ba-133 sorption, whereas for Cs-137 sorption, the order was determined as Ca2+ > Ni2+ > K+ > Na+. Selectivity studies pointed out that sorption of Ba-133 onto perlite is preferable to Cs-137. Therefore, Turkish perlite is a promising, cost-effective, and efficient natural material for the removal of Ba-133 and Cs-137 from relatively diluted aqueous solution.Ministry of Education Youth and Sports; MEYS [CZ.02.1.01/0.0/0.0/16_019/0000728]; European Union-European Structural and Investment Funds, Operational Programme Research, Development and EducationThis work was performed under the auspices of Ministry of Education Youth and Sports; Project Nr. CZ.02.1.01/0.0/0.0/16_019/0000728: RAMSES-Ultra-trace isotope research in social and environmental studies using accelerator mass spectrometry is funded by MEYS and European Union-European Structural and Investment Funds, Operational Programme Research, Development and Education

Removal of pertechnetate from aqueous solution using activated pyrolytic rubber char

Low-cost adsorbents, synthesized by pyrolysis of waste rubber (CR) and activated with KOH (CRA), have shown the high removal ability of from aqueous solutions in wide range of pHs (2-10) with fast adsorption rate. The Langmuir and Freundlich models suggests monolayer and multilayer adsorption of onto CR and CRA surface, respectively. The removal mechanism of from solution occurs by replacement with OH- from surface groups (phenolic and/or accompanying carboxylic) of CR and CRA indicating anion exchange mechanism

Repair of challenging non-malignant tracheo- or broncho-oesophageal fistulas by extrathoracic muscle flaps.

Evaluation of complex, acquired, non-malignant tracheo/broncho-oesophageal fistulas (TEF) repaired by extrathoracic pedicled muscle flaps that were, in addition to their interposition between the airways and the gastro-intestinal tract, patched into gastro-intestinal or airway defects if primary closure seemed risky. A single institution experience of patients treated between 2003 and 2015. Twenty-two patients required TEF repair following oesophageal surgery (18), Boerhaave syndrome (1), chemotherapy for mediastinal lymphoma (1), carinal resection and irradiation (1) and laryngectomy (1); 64% of them underwent prior radio- or chemotherapy and 50% prior airway or oesophageal stenting. Airway defects were closed by muscle flap patch ( n  = 12), lobectomy ( n  = 4), airway resection/anastomosis ( n  = 2), pneumonectomy ( n  = 1), segmentectomy ( n  = 2) or primary suture ( n  = 1). Gastro-intestinal defects were repaired by oesophageal diversion ( n  = 9), muscle flap patch ( n  = 8) or primary suture ( n  = 5). A muscle flap patch was used to close airway and gastro-intestinal defects in 55% and 36% of cases, respectively. The 90-day postoperative mortality and TEF recurrence rates were 18% and 4.5%. Airway healing and breathing without tracheal appliance was obtained in 95% of patients and gastro-intestinal healing in 77% of those without oesophageal diversion. Five of nine patients with oesophageal diversion underwent intestinal restoration by retrosternal colon transplants. Complex TEF arising after oesophageal surgery, radio-chemotherapy or failed stenting can be successfully closed using extrathoracic muscle flaps that can, in addition to their interposition between the airway and the gastro-intestinal tract, also be patched into gastro-oesophageal or airway defects if primary closure seems hazardous

Sorption and desorption of pertechnetate on biochar under static batch and dynamic conditions

The objective of this study was the utilization of three different biochars for pertechnetate removal from aqueous solutions. Biochars were prepared by slow pyrolysis from different feedstocks, characterized by BET, acid-base titration, SEM, XRD and FTIR and tested for their pertechnetate sorption using batch and dynamic techniques. Effect of various physico-chemical parameters such as contact time, pH and the presence of different ions in the solution on the sorption of pertechnetate onto biochars was investigated. Perrhenate as an analogue of pertechnetate was used for modeling of adsorption isotherms

Vascular-targeted low dose photodynamic therapy stabilizes tumor vessels by modulating pericyte contractility.

Vascular-targeted low-dose photodynamic therapy (L-PDT) was shown to improve chemotherapy distribution in malignant pleural tumors such as malignant pleural mesothelioma (MPM). However, the mechanisms triggered by L-PDT on the tumor vasculature are still debated. In pericyte and endothelial cell co-cultures, we show that pericytes exhibit enhanced sensitivity towards L-PDT compared to endothelial cells, displaying actin stress fibers and cellular contraction via Rho/ROCK kinase signaling myosin light chain and focal adhesion kinase phosphorylation (MLC-P, FAK-P). We then confirm, in two separate MPM models, in mice the phosphorylation of the MLC in pericytes specifically following L-PDT. Furthermore, while L-PDT does not affect tumor vascular density or diameter, we show that it enhances tumor vascular pericyte coverage, leads to a drop in tumor interstitial fluid pressure and enhances the transport of FITC-dextran throughout tumors. In conclusion, L-PDT has the potential to stabilize the tumor vascular bed which improves vascular transport. The mechanism described in the present study may help translate and optimize this approach in patients. Lasers Surg. Med. 51:550-561, 2019. © 2019 Wiley Periodicals, Inc