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1.
Am J Infect Control ; 2024 Aug 06.
Artículo en Inglés | MEDLINE | ID: mdl-39116999

RESUMEN

BACKGROUND: Despite local and national recommendations, healthcare provider adherence to personal protective equipment (PPE) varied during the COVID-19 pandemic. Previous studies have identified factors influencing initial PPE adherence but did not address factors influencing behaviors leading to correction after initial nonadherence. METHODS: We conducted a retrospective video review of 18 pediatric resuscitations involving aerosol-generating procedures (AGPs) from March 2020 to December 2022 to identify factors associated with nonadherence correction. We quantified adherent and nonadherent providers, instances of PPE nonadherence, and time to correction. We also analyzed correction behaviors, including provider actions and correction locations. RESULTS: Among 434 providers, 362 (83%) were nonadherent with at least one PPE. Only 186 of 1,832 instances of nonadherence were corrected, primarily upon room entry and during patient care. Correction time varied by PPE type and nonadherence level (incomplete versus absent). Most corrections were self-initiated, with few reminders from other providers. DISCUSSION: Potential barriers to correction include a lack of social pressure and external reminders. Solutions include optimizing PPE availability, providing real-time feedback, and educating on double-gloving. CONCLUSIONS: Most providers were nonadherent to PPE requirements during high-risk infection transmission events. The low correction rate suggests challenges in promoting collective responsibility and maintaining protective behaviors during medical emergencies.

2.
Adv Clin Chem ; 122: 53-114, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39111965

RESUMEN

The detection of volatile organic compounds (VOCs) in breath has become a potential method for early cancer screening. Although this approach has attracted increasing attention from the both scientific and medical communities, it has not received appreciable traction in the clinical setting. There are two main obstacles. One involves the identification of specific biomarkers or combinations thereof especially in early cancer. The other is the lack the specialized equipment for breath analysis having the appropriate sensitivity and specificity. Using metabolomics, this chapter examines the research strategies involving gas biomarkers in cancer patient breath, cancer cell gas metabolites and synthetic biomarkers. We briefly explore gas biomarkers of seven cancers and introduce principles of detection and clinical application. Large analytical instruments and small sensor technology are highlighted. Challenges to VOC analysis are presented including clinical use, extraction and detection, miniaturization efforts and examination of metabolic VOC pathways. Finally, VOCs in cancer and in exhaled breath detection technology are summarized and future prospects explored.


Asunto(s)
Pruebas Respiratorias , Neoplasias , Compuestos Orgánicos Volátiles , Humanos , Compuestos Orgánicos Volátiles/análisis , Pruebas Respiratorias/métodos , Neoplasias/diagnóstico , Neoplasias/metabolismo , Biomarcadores de Tumor/análisis , Espiración , Metabolómica/métodos
3.
Afr J Prim Health Care Fam Med ; 16(1): e1-e8, 2024 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-39099273

RESUMEN

BACKGROUND:  Type 2 diabetes mellitus (T2D) is a public health challenge, affecting 90% of all patients with diabetes, globally. Compliance to treatment guidelines among healthcare professionals (HCPs) is low, thus resulting in inadequate quality of patient care and poor health outcomes among patients. AIM:  To examine the availability of equipment, guidelines, screening and education offered to patients with T2D and compare between clinics and community health centres (CHCs). SETTING:  Tshwane Metropolitan Municipality, Gauteng Province, South Africa. METHODS:  A cross-sectional descriptive study utilised a self-administered questionnaire to collect data from nurses and doctors responsible for treating patients with T2D, from May to June 2022. About 250 eligible HCPs were recruited during routine morning meetings in 22 clinics and six CHCs. RESULTS:  More than 80% of HCPs reported having basic equipment except for ophthalmoscopes, Snellen charts (67%), tuning forks (64%), electrocardiograms (ECG) (46%) and monofilaments (12%). SEMDSA guidelines were reported by 16% of the participants, Diabetic Foot Care Guidelines were reported by 54% and Dietary Guidelines for Diabetic Patients by 55%. Furthermore, 91%, 71% and 69% of HCPs reported that ECG, microalbumin-creatinine and foot examinations were not always performed, respectively. About 66% and 17% always offered individual educational and group sessions, respectively. CONCLUSION:  Equipment availability and compliance with treatment guidelines, patient education and screening of chronic complications are inadequate.Contribution: The study highlights the poor adherence to treatment guidelines and inadequate equipment in health facilities. These shortcomings could lead to missed opportunities for early diagnosis of complications and ultimately poorer patient outcomes.


Asunto(s)
Diabetes Mellitus Tipo 2 , Calidad de la Atención de Salud , Humanos , Diabetes Mellitus Tipo 2/terapia , Sudáfrica , Estudios Transversales , Femenino , Masculino , Encuestas y Cuestionarios , Adhesión a Directriz/estadística & datos numéricos , Centros Comunitarios de Salud , Persona de Mediana Edad , Adulto
4.
Technol Health Care ; 2024 Jul 04.
Artículo en Inglés | MEDLINE | ID: mdl-39093083

RESUMEN

BACKGROUND: Innovations in healthcare technologies have the potential to address challenges, including the monitoring of fluid balance. OBJECTIVE: This study aims to evaluate the functionality and accuracy of a digital technology compared to standard manual documentation in a real-life setting. METHODS: The digital technology, LICENSE, was designed to calculate fluid balance using data collected from devices measuring urine, oral and intravenous fluids. Participating patients were connected to the LICENSE system, which transmitted data wirelessly to a database. These data were compared to the nursing staff's manual measurements documented in the electronic patient record according to their usual practice. RESULTS: We included 55 patients in the Urology Department needing fluid balance charting and observed them for an average of 22.9 hours. We found a mean difference of -44.2 ml in total fluid balance between the two methods. Differences ranged from -2230 ml to 2695 ml, with a divergence exceeding 500 ml in 57.4% of cases. The primary source of error was inaccurate or omitted manual documentation. However, errors were also identified in the oral LICENSE device. CONCLUSIONS: When used correctly, the LICENSE system performs satisfactorily in measuring urine and intravenous fluids, although the oral device requires revision due to identified errors.

5.
Artículo en Alemán | MEDLINE | ID: mdl-39093418

RESUMEN

Sustainability is becoming increasingly important in healthcare and has moved into focus at various levels. This article aims to provide an overview of guiding principles, concepts, and target systems of sustainability and to transfer these to occupational dermatology. Current and future starting points are outlined for various levels, e.g., politics, research, industry, and patient care, in order to link sustainability and occupational dermatology in a structured and systematic way and to transform the structures of patient care in occupational dermatology care towards sustainability. Using the specific example of protective gloves, which is a pivotal personal protective measure to prevent work-related hand eczema, starting points, potentials, and challenges are analyzed and specific possibilities and perspectives for more ecologically sustainable action are presented.

6.
Mar Pollut Bull ; 206: 116686, 2024 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-39089203

RESUMEN

There is an urgent need for marine ecological environment monitoring in China at present, but the traditional manual periodic sampling and testing has such disadvantages as low monitoring frequency and limited station coverage, which could not meet the requirements of large-scale real-time continuous data for current marine ecological early-warning monitoring. Therefore, constructing the multi-level, multi-system, and multi-space marine ecological environment online monitoring system could effectively develop marine ecological environment early-warning monitoring capacity. In this paper, the concept of "System of Systems" was introduced into the construction of marine ecological environment online monitoring equipment system, and the architecture of "System of Systems" of the monitoring equipment was constructed from two layers, structure layer and function layer. The composition of the two layers, and the difficulties in construction of the two layers were emphatically discussed. The paper also analyzed the methods of developing "System of Systems" of marine ecological environment online monitoring system.

7.
Adv Exp Med Biol ; 1458: 201-216, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39102198

RESUMEN

COVID-19 challenged countries in addressing population and raising awareness about mask-wearing during pandemic; Lebanon is a refugee hotspot, with humanitarian responsibility for their protection. The goal of this study is to emphasize the need of raising awareness among vulnerable populations and studying their mask-wearing behavior and intentions. This research draws on findings from a survey characterized by refugees' representatives from NGO, focusing on the behaviors and implications of refugees' mask-wearing. To address the study question, a customized survey based on Theory of Interpersonal Behavior was undertaken, in which the behavior of refugees was impacted by their desire to engage in an activity. The findings show that refugees are influenced by other people's mask-wearing behavior; they view masks as providing protection and aim to use them in the future provided all enabling conditions are met. Artificial intelligence might be a better monitor for this behavior in the future.


Asunto(s)
COVID-19 , Intención , Máscaras , Refugiados , Humanos , COVID-19/prevención & control , COVID-19/psicología , COVID-19/epidemiología , Refugiados/psicología , Líbano/epidemiología , Masculino , Adulto , Femenino , SARS-CoV-2 , Encuestas y Cuestionarios , Persona de Mediana Edad , Adulto Joven
8.
J Food Prot ; : 100346, 2024 Aug 13.
Artículo en Inglés | MEDLINE | ID: mdl-39147098

RESUMEN

Dark chocolate produced on equipment used to manufacture milk chocolate can contain milk due to cross-contact. This study evaluated the use of dry cleaning methods for removing milk chocolate residue from a butterfly or ball valve attached to a stainless steel pipe and from pilot-scale equipment used in chocolate manufacture. Milk-free dark chocolate (40°C) was pumped through a milk chocolate-contaminated valve/pipe assembly after no cleaning, use of a pig purging treatment, or a 40°C cocoa butter flush. Dark chocolate samples were collected at 7-sec intervals. Treatments investigated for removal of residual milk chocolate from a conche and a ball mill included no cleaning, a 40°C cocoa butter rinse, and wet cleaning. After cleaning, three batches of dark chocolate (40°C) were processed in the ball mill and conche, and each batch was collected. Milk chocolate was processed on a 3-roll refiner, followed by push-through with dark chocolate (∼9 kg) with 0.3 kg samples collected at 5-min intervals. Dark chocolate samples were analyzed for milk concentrations by ELISA. Trials and analyses were completed in triplicate. Dark chocolate push-through alone resulted in milk concentrations ≥4,500 µg/g in samples obtained from the contaminated valve/pipe combinations within the first few seconds of collection, and ≥16.2 kg of dark chocolate was needed to obtain milk concentrations below the ELISA LOQ (2.5 µg/g). A pig purging treatment of the ball valve/pipe assembly resulted in milk concentrations below the ELISA LOQ. A cocoa butter flush of the butterfly valve/pipe decreased initial milk concentrations, but milk was detected until ≥18.7 kg dark chocolate purge. Milk concentrations in first batches of dark chocolate processed in a ball mill and conche without cleaning were ≥17,000 µg/g while use of a cocoa butter rinse reduced milk levels in dark chocolate by ≥89%. Some dry cleaning treatments were effective at reducing levels of milk in dark chocolate due to cross-contact.

9.
Artículo en Inglés | MEDLINE | ID: mdl-39148460

RESUMEN

Currently, multifunction has become an essential direction of personal protective equipment (PPE), but achieving the protective effect, flexibility, physiological comfort, and intelligent application of PPE simultaneously is still a challenge. Herein, inspired by the meso-structure of rhinoceros skin, a novel strategy is proposed by compounding an ammonium sulfate ((NH4)2SO4) solution soaked gelatin hydrogel with the high weight fraction and vertically interwoven Kevlar fibers to manufacture a flexible and wearable composite with enhanced puncture resistance and strain-sensing properties. After (NH4)2SO4 solution immersion, the hydrogel's tensile strength, toughness, and fracture strain were up to 3.77 MPa, 4.26 MJ/m3, and 305.19%, respectively, indicating superior mechanical properties. The Kevlar/hydrogel composites revealed excellent puncture resistance (quasi-static of 132.06 N and dynamic of 295.05 N), flexibility (138.13 mN/cm), and air and moisture permeability (17.83 mm/s and 2092.73 g m-2 day-1), demonstrating a favorable balance between the protective effect and wearing comfort even after 7 days of environmental exposure. Meanwhile, salt solution immersion endowed the composite with excellent strain-sensing properties at various bending angles (30-90°) and frequencies (0.25-1 Hz) and allowed it to monitor different human motions directly in real-time. The rhinoceros-skin-inspired Kevlar/hydrogel composites provide a simple and economical solution for antipuncture materials that combine high protective effects, a comfortable wearing experience, and good strain-sensing properties, promising multifunctional PPE in the future.

11.
Expert Rev Med Devices ; : 1-10, 2024 Aug 11.
Artículo en Inglés | MEDLINE | ID: mdl-39119692

RESUMEN

INTRODUCTION: Refurbished medical devices are previously owned equipment that undergo a process of restoration to ensure they meet quality standards and function effectively. The utilization of refurbished medical devices, coupled with the integration of software, poses intricate challenges in terms of regulatory compliance, risk management, and patient safety. AREAS COVERED: This article explores the regulatory frameworks governing refurbished medical devices in the United States (US), the European Union (EU), Malaysia, and Ghana. Included information from a range of primary and secondary sources. Additionally, it aims to identify and analyze the risks associated with refurbished medical devices, with a specific focus on the implications of software integration, and recommend practical solutions for mitigating these risks. EXPERT OPINION: The landscape of refurbished medical devices presents challenges in terms of regulatory compliance, risk management, and patient safety. Addressing these challenges requires careful consideration and strategies to ensure that refurbished devices meet stringent quality standards. By focusing on these areas, policymakers and healthcare professionals can enhance the safe utilization of refurbished medical devices, thereby improving access to quality healthcare, particularly in underserved regions.

12.
Sensors (Basel) ; 24(15)2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39124040

RESUMEN

Personal protective equipment (PPE) has been universally recognized for its role in protecting workers from injuries and illnesses. Smart PPE integrates Internet of Things (IoT) technologies to enable continuous monitoring of workers and their surrounding environment, preventing undesirable events, facilitating rapid emergency response, and informing rescuers of potential hazards. This work presents a smart PPE system with a sensor node architecture designed to monitor workers and their surroundings. The sensor node is equipped with various sensors and communication capabilities, enabling the monitoring of specific gases (VOC, CO2, CO, O2), particulate matter (PM), temperature, humidity, positional information, audio signals, and body gestures. The system utilizes artificial intelligence algorithms to recognize patterns in worker activity that could lead to risky situations. Gas tests were conducted in a special chamber, positioning capabilities were tested indoors and outdoors, and the remaining sensors were tested in a simulated laboratory environment. This paper presents the sensor node architecture and the results of tests on target risky scenarios. The sensor node performed well in all situations, correctly signaling all cases that could lead to risky situations.


Asunto(s)
Dispositivos Electrónicos Vestibles , Lugar de Trabajo , Humanos , Equipo de Protección Personal , Algoritmos , Internet de las Cosas , Inteligencia Artificial , Material Particulado/análisis , Humedad
13.
J Neuroeng Rehabil ; 21(1): 140, 2024 Aug 10.
Artículo en Inglés | MEDLINE | ID: mdl-39127667

RESUMEN

BACKGROUND: Mixed reality (MR) is helpful in hand training for patients with stroke, allowing them to fully submerge in a virtual space while interacting with real objects. The recognition of individual finger movements is required for MR rehabilitation. This study aimed to assess the effectiveness of updated MR-board 2, adding finger training for patients with stroke. METHODS: Twenty-one participants with hemiplegic stroke (10 with left hemiplegia and 11 with right hemiplegia; nine female patients; 56.7 ± 14.2 years of age; and onset of stroke 32.7 ± 34.8 months) participated in this study. MR-board 2 comprised a board plate, a depth camera, plastic-shaped objects, a monitor, a palm-worn camera, and seven gamified training programs. All participants performed 20 self-training sessions involving 30-min training using MR-board 2. The outcome measurements for upper extremity function were the Fugl-Meyer assessment (FMA) upper extremity score, repeated number of finger flexion and extension (Repeat-FE), the thumb opposition test (TOT), Box and Block Test score (BBT), Wolf Motor Function Test score (WMFT), and Stroke Impact Scale (SIS). One-way repeated measures analysis of variance and the post hoc test were applied for the measurements. MR-board 2 recorded the fingers' active range of motion (AROM) and Dunnett's test was used for pairwise comparisons. RESULTS: Except for the FMA-proximal score (p = 0.617) and TOT (p = 0.005), other FMA scores, BBT score, Repeat-FE, WMFT score, and SIS stroke recovery improved significantly (p < 0.001) during MR-board 2 training and were maintained until follow-up. All AROM values of the finger joints changed significantly during training (p < 0.001). CONCLUSIONS: MR-board 2 self-training, which includes natural interactions between humans and computers using a tangible user interface and real-time tracking of the fingers, improved upper limb function across impairment, activity, and participation. MR-board 2 could be used as a self-training tool for patients with stroke, improving their quality of life. TRIAL REGISTRATION NUMBER: This study was registered with the Clinical Research Information Service (CRIS: KCT0004167).


Asunto(s)
Dedos , Mano , Rehabilitación de Accidente Cerebrovascular , Humanos , Femenino , Rehabilitación de Accidente Cerebrovascular/métodos , Rehabilitación de Accidente Cerebrovascular/instrumentación , Persona de Mediana Edad , Masculino , Dedos/fisiología , Mano/fisiopatología , Anciano , Adulto , Accidente Cerebrovascular/fisiopatología , Accidente Cerebrovascular/complicaciones , Movimiento/fisiología , Resultado del Tratamiento , Hemiplejía/rehabilitación , Hemiplejía/etiología , Hemiplejía/fisiopatología , Recuperación de la Función
14.
Sci Rep ; 14(1): 19104, 2024 Aug 17.
Artículo en Inglés | MEDLINE | ID: mdl-39154030

RESUMEN

Printing as a process itself generates many environmental concerns. The paper addresses ink management in terms of environmental issues in the label printing industry, focusing on its environmental implications. The goal is to demonstrate how a proper ink management system impacts overall printing process efficiency and environmental sustainability for printing companies. The paper introduces an empirical approach to managing components for label and packaging production, utilizing automatic ink dispensing systems. The results demonstrate that the proper management of ink dispensing to minimize waste in packaging printing is crucial for optimizing operating print costs, potentially reducing the amount of ink needed to prepare colors by 52% and achieving energy savings of 37%. This approach fulfills the goal of sustainability by addressing environmental, economic, and social concerns. By optimizing ink usage and energy consumption, companies can significantly reduce operating costs and enhance economic performance. Simultaneously, these practices improve product quality, meet consumer demands for sustainable packaging, and create better working conditions for employees. Future directions and practical implications for supporting operational excellence in production are also discussed.

15.
Artículo en Inglés | MEDLINE | ID: mdl-39112756

RESUMEN

PURPOSE: During the last few years, the number of electric scooter (e-scooter) users has risen to an all-time high. This study aimed to analyze e-scooter related accidents and trauma prevention measures in a large European city (Vienna, Austria). METHODS: This retrospective study comprises a thorough data assessment and analysis of all e-scooter related accidents between 2018 and 2021 at a large level 1 trauma center in Vienna. Based on the data analysis, risk factors were identified, and possible prevention strategies were proposed. RESULTS: During the observed period, 1337 patients sustained an injury from an e-scooter. Of these, 1230 were injured directly while driving (92%). The remaining 107 patients (8%) were classified as non-driving injuries. 927 injuries involved males (69.3%). The mean age was 32.1 years (range 4-86 years). Of all injured patients, 429 (32.1%) sustained at least one serious injury. The most common injuries included radial head fractures and concussions. Among the accidents treated, the use of protective equipment was sporadic. For example, helmets were worn in only 13.7% of cases. Wearing a helmet reduced the number of head injuries (24% versus 46.8%). In just three years, the number of patients increased 19-fold with a focus in the summer months. CONCLUSION: This study shows a substantial and sustained increase in e-scooter accidents with potentially serious injuries. Helmet use was found to be an effective form of head injury prevention. Further options for using protective equipment should be evaluated to improve the safety aspects of riding e-scooters.

16.
BJA Open ; 11: 100301, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39104827

RESUMEN

Background: The damage that may be caused to the operating table and patients under general anaesthesia when a large earthquake occurs is unclear. We aimed to evaluate the movement and damage to operating tables and patients under general anaesthesia during an earthquake. Methods: An operating table with a manikin resembling a patient on it was placed on a shaking table, and seismic waves were input into the shaking table. The effects of seismic waves were evaluated by altering surgical positions (supine and head-down positions), operating tables, flooring material, seismic waves, and output. We observed the movement of the operating table and measured the acceleration of the operating table and manikin head. Results: Under 90% output of long-period seismic waves, the operating table with the supine manikin was overturned. Under experimental conditions that did not cause rocking, shaking such as tilting of the operating table caused stronger acceleration in the manikin's head than in the operating table. There was no clear relationship between operating table rocking and maximum acceleration as a result of programmed seismic waves. In long-period earthquakes, rocking and overturning occurred >60 s after the onset of shaking, whereas in direct earthquakes, rocking occurred within 10 s. Conclusions: An earthquake could cause strong acceleration of the patient's head under general anaesthesia, and operating tables may overturn or shake violently. Regarding patient safety, further measures to prevent overturning should be considered.

17.
World J Surg ; 2024 Aug 06.
Artículo en Inglés | MEDLINE | ID: mdl-39107916

RESUMEN

BACKGROUND: Refinement of surgical preference cards may reduce waste from surgery. This study aimed to characterize surgeon perceptions and practices regarding preference card maintenance, identify barriers to updating preference cards, and explore whether opinions on environmental stewardship relate to preference card maintenance. METHODS: This was a mixed methods survey performed at a single tertiary academic medical center. Surgeons completed questions on accuracy, frequency of updates, and perceived environmental impact of their preference cards. Responses were compared between early career and mid-to late-career surgeons using Kruskal-Wallis, chi-squared, and Fisher's exact tests. RESULTS: The response rate was 46.4% (n = 89/192). Among respondents, 46.1% (n = 41/89) rarely or never updated preference cards. Nearly all (98.9%, n = 87/88) said some of their cases had unused items on their cards. Most (87.6%, n = 78/89) made updates via verbal requests. Unfamiliar processes (83.7%, n = 72/86) and effort required (64.0%, n = 55/86) were viewed as barriers to card maintenance. Most agreed that more frequent updates would reduce waste (80.5%, n = 70/87), but respondents did not feel knowledgeable about the environmental impact of items on their cards (62.1%, n = 54/87). Mid-to late-career surgeons were less likely to update their cards annually or more often compared to early career surgeons (18.9%, n = 7/37 vs. 57.1%, n = 24/42, p < 0.001). No other responses varied significantly between early career and mid-to late-career surgeons. CONCLUSIONS: Surgeons acknowledged the utility of preference card maintenance in environmental stewardship, but unfamiliar systems and perceived effort hindered preference card review. Greater attention to preference card maintenance would promote environmentally sustainable practices in surgery.

18.
Gastrointest Endosc ; 2024 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-39128530

RESUMEN

BACKGROUND AND AIMS: Periodic duodenoscope cultures are essential to timely detect contamination, but their sensitivity remains unknown. This study aims to determine the sensitivity of duodenoscope cultures and to estimate the prevalence of contaminated duodenoscope use. METHODS: We combined duodenoscope microbiological surveillance data from March 2015 to June 2022 with usage data to evaluate patient exposure to duodenoscopes contaminated with microorganisms of gut or oral origin (MGO). We identified duodenoscopes with repeated species-level contamination within a year and used molecular typing to confirm genetic relatedness. Genetically related microorganisms over multiple duodenoscope cultures of a single duodenoscope indicated a period of sustained contamination and a cluster was defined as overlapping periods of sustained contamination between different duodenoscopes. If microorganisms were not available for molecular analysis, we marked the period as unconfirmed. A sample was defined as false-negative if it did not show the target microorganism(s) in a period of sustained contamination. We used three scenarios to hypothesize about contaminated use and culture sensitivity. RESULTS: We included 556 duodenoscope cultures with 185 (33.3%) contaminated with MGO. The total usage of duodenoscopes was 5226. We identified one period of sustained contamination, six unconfirmed periods, and two clusters. Depending on our scenario assumptions, the percentage of contaminated use varied from 12.3% to 23.7%, and culture sensitivity ranged from 82.2% to 98.9%. CONCLUSIONS: Limited sensitivity of duodenoscope cultures leads to improper clearance of duodenoscopes for clinical use, increasing risks of outbreaks. The applicability of a single culture to end a duodenoscope's quarantine should be reevaluated.

19.
Waste Manag ; 187: 156-166, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39043078

RESUMEN

Waste electrical and electronic equipment (WEEE) has become a critical environmental problem. Catalytic pyrolysis is an ideal technique to treat and convert the plastic fraction of WEEE into chemicals and fuels. Unfortunately, research using real WEEE remains relatively limited. Furthermore, the complexity of WEEE complicates the analysis of its pyrolytic kinetics. This study applied the Fraser-Suzuki mathematical deconvolution method to obtain the pseudo reactions of the thermal degradation of two types of WEEE, using four different catalysts (Al2O3, HBeta, HZSM-5, and TiO2) or without a catalyst. The main contributor(s) to each pseudo reaction were identified by comparing them with the pyrolysis results of the pure plastics in WEEE. The nth order model was then applied to estimate the kinetic parameters of the obtained pseudo reactions. In the low-grade electronics pyrolysis, the pseudo-1 reaction using TiO2 as a catalyst achieved the lowest activation energy of 92.10 kJ/mol, while the pseudo-2 reaction using HZSM-5 resulted in the lowest activation energy of 101.35 kJ/mol among the four catalytic cases. For medium-grade electronics, pseudo-3 and pseudo-4 were the main reactions for thermal degradation, with HZSM-5 and TiO2 yielding the lowest pyrolytic activation energies of 75.24 and 226.39 kJ/mol, respectively. This effort will play a crucial role in comprehending the pyrolysis kinetic mechanism of WEEE and propelling this technology toward a brighter future.


Asunto(s)
Residuos Electrónicos , Plásticos , Pirólisis , Residuos Electrónicos/análisis , Plásticos/química , Cinética , Catálisis , Titanio/química , Modelos Teóricos , Eliminación de Residuos/métodos
20.
Ann Pharm Fr ; 2024 Jul 24.
Artículo en Francés | MEDLINE | ID: mdl-39059762

RESUMEN

OBJECTIVES: An operating room pharmaceutical unit centralizes medical devices and drugs for various surgical specialities. The aim of this work is to present the methodology used in our establishment to set up the operating room pharmaceutical unit. METHODS: This approach involved the formation of multi-professional working groups. The needs of operating theatres were defined based on an analysis of healthcare product consumption and stock inventories. Material sheets were defined for each procedure. On the basis of simulations, material supply arrangements were selected, specifying material flows, equipment, workstations and information systems. RESULTS: Over 3200 healthcare product references were identified and 862 equipment files were created. Local stocks have been limited to medical trolleys for nursing staff. Emergency operating packs have been deployed for unforeseen operations. Cabinets have been dedicated to transporting re-sterilizable medical devices, and carts have been purchased for programmed operating packs. The equipment is made available by logistics agents and pharmacy assistants under pharmaceutical responsibility. CONCLUSIONS: This innovative approach is a model for facilities desiring to centralize and secure the logistics of healthcare products in the operating room. Ongoing adjustments will be required to meet new operating rooms needs.

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