Resuming elective hip and knee arthroplasty after the first phase of the SARS-CoV-2 pandemic: the European Hip Society and European Knee Associates recommendations

The Covid-19 pandemic has disrupted health care systems all over the world. Elective surgical procedures have been postponed and/or cancelled. Consensus is, therefore, required related to the factors that need to be in place before elective surgery, including hip and knee replacement surgery, which is restarted. Entirely new pathways and protocols need to be worked out. Methods A panel of experts from the European Hip Society and European Knee Association have agreed to a consensus statement on how to reintroduce elective arthroplasty surgery safely. The recommendations are based on the best available evidence and have been validated in a separate survey. Results The guidelines are based on five themes: modification and/or reorganisation of hospital wards. Restrictions on orthopaedic wards and in operation suite(s). Additional disinfection of the environment. The role of ultra-clean operation theatres. Personal protective equipment enhancement. Conclusion Apart from the following national and local guidance, protocols need to be put in place in the patient pathway for primary arthroplasty to allow for a safe retur

Recommendations for resuming elective hip and knee arthroplasty in the setting of the SARS‑CoV‑2 pandemic: the European Hip Society and European Knee Associates Survey of Members

The COVID-19 pandemic has disrupted the health care system around the entire globe. A consensus is needed about resuming total hip and knee procedures. The European Hip Society (EHS) and the European Knee Association (EKA) formed a panel of experts that have produced a consensus statement on how the safe re-introduction of elective hip and knee arthroplasty should be undertaken. Methods A prospective online survey was done among members of EHS and EKA. The survey consisted of 27 questions. It includes basic information on demographics and details the participant’s agreement with each recommendation. The participant could choose among three options (agree, disagree, abstain). Recommendations focussed on pre-operative, perioperative, and post-operative handling of patients and precautions. Results A total of 681 arthroplasty surgeons participated in the survey, with 479 fully completing the survey. The participants were from 44 countries and 6 continents. Apart from adhering to National and Local Guidelines, the recommendations concerned how to make elective arthroplasty safe for patients and staf. Conclusion The survey has shown good-to-excellent agreement of the participants with regards to the statements made in the recommendations for the safe return to elective arthroplasty following the frst wave of the COVID-19 pandemi

Metal Complexes as Photosensitizers and Relays for the Redox Decomposition of Water

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Covalently Linked Systems Containing Metal Complexes

The aim of this Chapter is to provide an overview of photoinduced electron transfer (PET) in covalently linked systems containing metal complexes. In bimetallic dyads, energy transfer (EnT) and PET are often strongly intertwined, either as competitive or as mechanistically related processes. Therefore, the discussion will include, when required, EnT results as well

“Excited-State Equilibration: A Process Leading to Long-Lived Metal-to-Ligand Charge Transfer Luminescence in Supramolecular Systems”

A recently developed strategy to prolong the luminescence lifetime of metal polypyridine complexes is discussed, and various resulting supramolecular systems are presented. The intervening mechanism demands that certain thermodynamic and kinetic parameters are satisfied, notably rapid and reversible electronic energy transfer between lowest-lying isoenergetic triplet excited states located on an inorganic moiety, e.g., a triplet metal-to-ligand charge transfer state (3MLCT), and localised on a separate organic chromophore, such as a triplet 3 – * state, although the involvement of other states is also considered. Originally implemented with a pyrenyl-appended Ru(II) polypyridine complex, the generality of this approach has been demonstrated through the judicious combination of different metal complexes having 3MLCT states in conjunction with various matched organic chromophores and thus presents a new tool to instil made-to-order properties in supramolecular systems. Multichromophoric species and systems invoking second-sphere interactions are also considered

Salt Effects on Nearly-Diffusion-Controlled Electron Transfer Reactions. Bimolecular Rate Constant and Cage Escape Yields in Oxidative Quenching of Tris(2,2'-bipyridine)ruthenium(II)

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Electron Transfer Quenching of Excited States by Europium(III) in Acetonitrile Solutions

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“Absorption spectra and photophysical properties of a series of polypyridine ligands containing appended pyrenyl and anthryl chromophores and of their ruthenium(II) and osmium(II) complexes”

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Quenching of Singlet and Triplet Excited States of Aromatic Molecules by Europium Ions

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