Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Investigation of proton and alpha radiation effects on polymer concrete by using GEANT4

Секция 2. Радиационные эффекты в твердом телеIn this study, the effects of proton and alpha radiation on polymer concrete material have been investigated by using GEANT4 which is a freely distributed code with a very wide range of use. The polymer’s selection is due to its preferable regarding its physical and chemical properties such as low cost of production, ease of synthesizing and light weight etc. The radiation effects of different induced particles and also stopping power and penetrating distance investigations have been done to examine the possibility of using the polymer concrete as shielding material. To reach our aim as simulating the different situations, GEANT4’s PhysListEmStandard and G4EmStandardPhysics libraries have been employed for two types of polymer concrete samples where one has 0 % natural standard CEN sand while other has 75 % of natural standard CEN sand. The rest of the studied materials consists of polyester resin. Obtained results such as the penetrating distance and the stopping power have been discussed for both studied material

Kayma Gerilmeleri İçeren FDM Kabukların Eksenel Basınç Yükü Etkisi Altında Stabilitesi

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2015Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2015Fonksiyonel değişimli malzemelerden (FDM’ler) oluşan çekirdeğe sahip sandviç silindirik kabukların eksenel basınç yükü etkisi altında stabilitesi Kayma Deformasyonlar Teorisi (KDT) kullanılarak incelenmektedir. FDM çekirdekli silindirik kabukların temel bağıntıları ve değiştirilmiş Donnell tipi temel denklemleri KDT temel alınarak türetilmekte ve Galerkin Yöntemi uygulanarak çözülmektedir. KKT ve KDT temelinde, FD çekirdekli sandviç silindirik kabukların boyutsuz kritik eksenel yükü için analitik ifadeler bulunmaktadır. Analizler kısmında, kayma gerilmelerinin, hacim bileşenleri değişiminin, kabuk karakteristiklerinin, çekirdek kalınlığı değişiminin sandviç silindirik kabukların kritik eksenel yükünün minimum değerlerine etkileri sayısal olarak incelenmektedir. Anahtar Kelimeler: Fonksiyonel değişimli malzeme (FDM), Fonksiyonel değişimli (FD) çekirdek, sandviç silindirik kabuk, eksenel yük, kritik yük, KDTThe stability of the sandwich cylindrical shell containing functionally graded materials (FGMs) under axial load based on the shear deformation theory (SDT) is investigated. The basic relations and modified Donnell type basic equations of metal cylindrical shells coated with FGMs are derived on the basis of SDT and solved by using Galerkin method. Analytical expressions for the dimensionless critical axial load of the sandwich cylindrical shell containing an FG layer based on the CST and SDT are found. Finally, the effects of variations of shear stresses, volume fractions of the core, shell characteristics and variations of the thickness of the FG core on the values of the critical axial load of sandwich cylindrical shell containing an FG core are studied numerically. Keywords: Functionally graded materials (FGMs), functionally graded (FG) core, sandwich cylindrical shell, axial load, critical load, SD

Fonksiyonel Değişimli Malzemelerle Kaplı Seramik Silindirik Panelin Titreşim Analizi

In this study, the vibration of ceramic cylindrical panel covered by FGM coatings composed of zirconium oxide (ZrO2) and titanium-aloy (Ti6Al4V) is investigated. First, a sandwich cylindrical panel covered by FGM coatings is designed. After the derivation of basic equations are found expression for the frequency of ceramic cylindrical panels covered by FGM coatings. Discusses the influence of coatings profiles, sandwich shell characteristics, the radius-tothickness ratio and the core-to-coating thickness ratio on the dimensionless frequencies for FG and homogeneous sandwich cylindrical shell

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Background: Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods: This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was coprioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low-middle-income countries. Results: In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of 'single-use' consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low-middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion: This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high- and low-middle-income countries