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1.
Animals (Basel) ; 14(2)2024 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-38254376

RESUMO

The axolotl (Ambystoma mexicanum) draws great attention around the world for its importance as a biomedical research model, but housing and maintaining live animals is increasingly expensive and risky as new transgenic lines are developed. The goal of this work was to develop an initial practical pathway for sperm cryopreservation to support germplasm repository development. The present study assembled a pathway through the investigation of axolotl sperm collection by stripping, refrigerated storage in various osmotic pressures, cryopreservation in various cryoprotectants, and in vitro fertilization using thawed sperm. By the stripping of males, 25-800 µL of sperm fluid was collected at concentrations of 1.6 × 106 to 8.9 × 107 sperm/mL. Sperm remained motile for 5 d in Hanks' Balanced Salt Solution (HBSS) at osmolalities of 100-600 mOsm/kg. Sperm cryopreserved in 0.25 mL French straws at 20 °C/min in a final concentration of 5% DMFA plus 200 mM trehalose and thawed at 25 °C for 15 s resulted in 52 ± 12% total post-thaw motility. In six in vitro fertilization trials, 20% of eggs tested with thawed sperm continued to develop to stage 7-8 after 24 h, and a third of those embryos (58) hatched. This work is the first report of successful production of axolotl offspring with cryopreserved sperm, providing a general framework for pathway development to establish Ambystoma germplasm repositories for future research and applications.

2.
J Prim Care Community Health ; 14: 21501319231202204, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37837373

RESUMO

BACKGROUND: The effective and efficient operation of emergency services at healthcare depends on triage decisions. Successfully implementing a triage system improves patient care, communication, and self-assurance. METHODS: A baseline audit was conducted by reviewing a sample of 554 triage health records in September 2021. Many gaps were identified in the practice, and action plans were developed for improving it. Following the implementation of the action plan, a re-audit was conducted in September 2022 with a sample of 470 medical records. RESULTS: Evidence suggested that nurses had made progress in correctly allocating the medical emergency triage category from 63% at baseline to 90% at the reaudit. The over-triage decreased in accordance with this adjustment, from 37% to 10%. Compliance with the suggested time target of 5 minutes for physicians to attend medical emergencies has shown a small improvement from 48% at baseline to 55% in the re-audit. Similar improvements were demonstrated in the other triage categories. CONCLUSION: A problem may have several causes, and since it is impossible to address every one of them, prioritizing the causes is usually the best course of action. Inadequate triage classification by nurses was one of the key reasons for the delay in physician appointment times in triage clinics. Triage nurses' abilities should be enhanced to make this triage judgment. The audit team suggested that nurses should be given problem-based training, which will enhance the entire triage procedure.


Assuntos
Melhoria de Qualidade , Triagem , Humanos , Auditoria Clínica , Comunicação , Atenção Primária à Saúde
3.
Front Psychol ; 14: 1138836, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37235088

RESUMO

[This corrects the article DOI: 10.3389/fpsyg.2022.1050435.].

4.
Artigo em Inglês | MEDLINE | ID: mdl-36900972

RESUMO

Given the cost-effective nature of promoting desirable behaviors among individuals and societies, national and local governments have widely applied the nudge concept in various public policy fields. This viewpoint briefly explains the concept of nudge and presents the trend of nudge application in public health policy with illustrative examples. While most academic evidence on its effectiveness has been derived from Western countries, there is a significant accumulation of cases of nudge practices in non-Western countries, including the Western Pacific nations. This viewpoint also provides tips for designing nudge interventions. We introduce a simple, three-step procedure for this purpose: (1) identify target behavior, (2) determine friction and fuel of the behavior, and (3) design and implement a nudge-as well as the behavioral process map and the EAST framework.


Assuntos
Comportamento de Escolha , Comportamentos Relacionados com a Saúde , Humanos , Política Pública , Motivação , Política de Saúde
5.
Risk Anal ; 43(12): 2411-2421, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-36899446

RESUMO

Systems-theoretic process analysis (STPA) is a prospective safety assessment tool increasingly applied in healthcare. A problem hampering STPA proliferation is the difficulty of modeling systems for analysis by creating control structures. In this work, a method is proposed to use existing process maps-commonly available in healthcare-when creating a control structure. The proposed method entails (1) extract information from the process map, (2) determine the modeling boundary of the control structure, (3) transfer the extracted information to the control structure, (4) add additional information to complete the control structure. Two case studies were conducted: (1) ambulance patient offloading in the emergency department and (2) ischemic stroke care with intravenous thrombolysis. The amount of process map-derived information in the control structures was quantified. On average, 68% of the information in the final control structures was derived from the process map. Additional control actions and feedback were added from nonprocess map sources for management and frontline controllers. Despite the differences between process maps and control structures, much of the information in a process map can be used when creating a control structure. The method enables the creation of a control structure from a process map to be done in a structured fashion.


Assuntos
Atenção à Saúde , Análise de Sistemas , Humanos , Estudos Prospectivos , Serviço Hospitalar de Emergência
6.
Genet Med ; 25(2): 100109, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-35115231

RESUMO

PURPOSE: Clinical genomics demands close interaction of physicians, laboratory scientists, and genetic professionals. Taking genomics to scale requires an understanding of the underlying processes from the perspective of nongenetic physicians who are new to the field. We identified components of the processes amenable to adaptation when scaling up clinical genomics. METHODS: Semistructured interviews informed by the Theoretical Domains Framework with nongenetic physicians, who were using clinical genomics in practice, were guided by an annotated process map with 7 steps following the patient's journey. Findings from the individual maps were synthesized into an overview process map and a series of individual maps by common location and specialty. Interviews were analyzed using the Theoretical Domains Framework. RESULTS: In total, 16 nongenetic physicians (eg, nephrologists, immunologists) participated, generating 1 overview and 10 individual process maps. Sixteen common steps were identified across clinical specialties and locations, with variations over 9 steps. We report the potential for standardization across these 9 steps. CONCLUSION: When scaling up complex interventions, it is essential to identify steps where variation can be accommodated. With these results we show how process mapping can be used to identify steps where variation is acceptable during scale up to accommodate adaptation to local context, allowing for the inevitable evolution of factors influencing ongoing implementation and sustainability.


Assuntos
Genômica , Serviços de Saúde , Humanos , Austrália , Ciência da Implementação
7.
J Lab Physicians ; 14(4): 471-478, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36545118

RESUMO

Objectives A number of regulatory and accrediting bodies require the reporting of critical results on a timely basis (immediately or within the time frame established by the laboratory) to "the responsible, licensed caregiver" as timely notification of critical laboratory results can pivotally affect patient outcome. The aim of the study was to decrease the turnaround time (TAT) of critical result notification along with assurance of notification to the concerned caregiver or clinicians. The objectives was 30% reduction in the critical value notification TAT and identify factors associated with delayed reporting and root cause analysis for these factors by application of quality tools. Materials and Methods The study was conducted at the Institute of Human Behavior and Allied Sciences, Delhi, a tertiary center teaching Hospital, from April 2019 to June 2021. A value streamed Process Map of critical alert was prepared. The incidents related to failure were presented through Pareto chart. The possible causes were analyzed through the fishbone model. The failure mode prioritization was executed with Failure Mode and Effect Analysis (FMEA). Through extensive brainstorming, appropriate and feasible corrective actions were implemented. The effectiveness of the implemented plan was analyzed by reassessing the TAT of critical alert and feedback received by clinical caregivers. Results After implementation of corrective action plan using quality tools for 3 months, the average critical alert TAT was reduced to 21 minutes from 30 minutes (30% reduction). The median critical alert TAT for ICU, emergency, and IPD were reduced to 3 minutes (IQR: 1-7). During the pilot project, 156 critical value data were sent for feedback with treatment plan but was received only for 88 patients (56%). Conclusion Comprehensive utilization of quality tools has a potential role in patient safety by reducing the critical alert TAT as well as establishing an effective communication between laboratory personnel and clinicians.

8.
Phys Imaging Radiat Oncol ; 23: 1-7, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35712526

RESUMO

Background and purpose: Online magnetic resonance-guided adaptive radiotherapy (MRgART) is a new technology of radiotherapy and requires a new quality control program in many aspects. This study aimed to gain a deeper understanding of risks in online MRgART through the application of failure mode and effect analysis (FMEA) for more enhanced and effective quality assurance (QA) programs. Materials and methods: We present an FMEA conducted by a multidisciplinary team with more than two years of experience. A process map describing the whole process of online MRgART was developed and potential failure modes were identified. High-risk failure modes and their potential causes and corrective measures were also identified. Failure modes were classified into three categories, MRgRT, online ART, and conventional RT, to investigate their features. A comparison with previous studies was also conducted to gain a general perspective. Results: In total, 153 failure modes and 49 high risks were identified. Among all failure modes, 51, 63, and 66 were related to MRgRT, online ART, and conventional RT, respectively. The hazardous processes were structure segmentation, treatment planning, and treatment beam delivery. Lists of failure modes identified in this study and previous studies were presented. Based on the results, characteristics and general aspects of the risks were discussed. Conclusion: Exploring the results of the FMEA enhanced our understanding of risk characteristics to improve QA program of online MRgART.

9.
J Appl Clin Med Phys ; 23(6): e13606, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35536773

RESUMO

PURPOSE: Biology-guided radiotherapy (BgRT) is a new external beam radiation therapy modality combining PET-CT with a linear accelerator that has the potential to track and treat one or more tumors in real-time. The use of PET and radiopharmaceutical tracers introduces new processes that are different from the existing treatment processes. In this study, we have developed a process map for the clinical implementation of a prototype BgRT machine. METHODS: A team of 13 members from various radiation therapy disciplines at our institution participated in developing a prospective process map for a prototype BgRT machine. The methodology provided by the AAPM TG 100 report was followed. In particular, the steps unique to the BgRT workflow, using hypofractionated stereotactic body radiation therapy with fluorodeoxyglucose radiolabeled with fluorine-18 (FDG) to guide beam delivery, were analyzed. RESULTS: The multi-disciplinary team in the department of radiation oncology at our institution developed a prospective process map for the clinical BgRT workflow. By focusing on the appropriate level of detail, 15 major subprocesses, 133 steps, and 248 substeps were identified and the process map was agreed upon as being useful, implementable, and manageable. Seventy-four steps from nine subprocesses, 55.6% of the whole process, were analyzed to be the BgRT unique steps. They originate mainly from: (1) acquiring multiple PET images at the BgRT machine with separate patient visits, (2) creating a unique biological treatment volume for BgRT plan (PTVBgRT ), and (3) BgRT plan optimization and treatment delivery using PET images. CONCLUSION: Using BgRT to irradiate multiple metastases in the same session will impact clinical workflow, thus a graphical process map depicting the new clinical workflow with an appropriate level of detail is critical for efficient, safe, and high-quality care. The prospective process map will guide the successful setup and use of the new BgRT system.


Assuntos
Radioterapia (Especialidade) , Biologia , Humanos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Estudos Prospectivos , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador/métodos , Fluxo de Trabalho
10.
Front Psychol ; 13: 1050435, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36687897

RESUMO

Understanding students' learning characteristics is central to successfully designing student-centered learning. Particularly in the problem-solving area, it is vital to know that students can possess their styles to solve problems, which should be considered central to addressing adaptive learning. To date, analyzing students' learning characteristics has been mainly based on their final answers. However, there is a limit to understanding the thinking process of students with the correct answer, because their responses are, de facto, singular and identical. With this background, we propose an approach for investigating students' cognitive behavior in problem-solving using response time in the process data. In this paper, we analyzed an item in Programme for International Student Assessment 2012 Creative Problem Solving (CP038q1). We analyzed log data from the PISA CPS item Ticket encompassing 30,453 students (7,196 students with the correct answer and 23,257 students with incorrect answers) from 42 countries. We found that students with the correct answer are categorized into four clusters, and the problem-solving patterns of each cluster are distinguishable. We also showed the internal validity of this approach by confirming that students with incorrect answers can also be similarly classified. Our results indicate that allotted response time in an item can shed light on several distinguished problem-solving patterns, which implies that adaptive learning and feedback are vital for them.

11.
Health Expect ; 24(1): 131-139, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33210821

RESUMO

BACKGROUND: Achalasia is a rare motility disorder affecting the oesophagus, which is associated with a range of symptoms and different treatment strategies. Currently, little is known about people's experiences with achalasia and its management. This study aimed to understand the experiences of people living with achalasia, from the initial onset of symptoms to long-term management. METHOD: This qualitative study explored the journey of people living with achalasia and outlined the care pathway using a process map. Ten female and five male participants living with achalasia (age range: 40-73) took part, and all aspects of their diagnosis, treatment and management were discussed. A process map showing people's experiences by separating the management of their condition into a series of steps was developed to present the pathway in the participants' journey. The analysis involved discussing the process map within the research team. RESULTS: The process map comprised of 10 steps, which occurred before and after diagnosis. The developed map indicates that most participants managed their on-going symptoms through stress management techniques and dietary changes. Key issues that participants highlighted about their journey managing achalasia were misdiagnosis, delay in diagnosis and lack of support in the long-term management of achalasia. CONCLUSIONS: This research was a novel study exploring patients' experiences and management of achalasia and mapping their journey. Two distinct phases to their journeys were identified: before and after diagnosis. Areas highlighted by this study can provide a basis for future research, in particular behaviour change to support the long-term management of achalasia.


Assuntos
Acalasia Esofágica , Adulto , Idoso , Acalasia Esofágica/diagnóstico , Acalasia Esofágica/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pesquisa Qualitativa
12.
Curr Eye Res ; 46(5): 694-703, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-32940071

RESUMO

PURPOSE/AIM OF THE STUDY: To quantify the cost of performing an intravitreal injection (IVI) utilizing activity-based costing (ABC), which allocates a cost to each resource involved in a manufacturing process. MATERIALS AND METHODS: A prospective, observational cohort study was performed at an urban, multi-specialty ophthalmology practice affiliated with an academic institution. Fourteen patients scheduled for an IVI-only visit with a retina ophthalmologist were observed from clinic entry to exit to create a process map of time and resource utilization. Indirect costs were allocated with ABC and direct costs were estimated based on process map observations, internal accounting records, employee interviews, and nationally-reported metrics. The primary outcome measure was the cost of an IVI procedure in United States dollars. Secondary outcomes included operating income (cost subtracted from revenue) of an IVI and patient-centric time utilization for an IVI. RESULTS: The total cost of performing an IVI was $128.28; average direct material, direct labor, and overhead costs were $2.14, $97.88, and $28.26, respectively. Compared to the $104.40 reimbursement set by the Centers for Medicare and Medicaid Services for Current Procedural Terminology code 67028, this results in a negative operating income of -$23.88 (-22.87%). The median clinic resource-utilizing time to complete an IVI was 32:58 minutes (range [19:24-1:28:37]); the greatest bottleneck was physician-driven electronic health record documentation. CONCLUSIONS: Our study provides an objective and accurate cost estimate of the IVI procedure and illustrates how ABC may be applied in a clinical context. Our findings suggest that IVIs may currently be undervalued by payors.


Assuntos
Contabilidade/métodos , Alocação de Custos/economia , Custos de Cuidados de Saúde , Injeções Intravítreas/economia , Oftalmologia/economia , Avaliação de Processos em Cuidados de Saúde/economia , Eficiência Organizacional/economia , Recursos em Saúde/economia , Humanos , Modelos Econômicos , Admissão e Escalonamento de Pessoal/economia , Estudos Prospectivos , Estados Unidos
13.
Igaku Butsuri ; 40(1): 28-34, 2020.
Artigo em Japonês | MEDLINE | ID: mdl-32238680

RESUMO

In 2016, the American Association of Physicists in Medicine (AAPM) has published a report of task group (TG) 100 with a completely new concept, entitled "application of risk analysis methods to radiation therapy quality management." TG-100 proposed implementation of risk analysis in radiotherapy to prevent harmful radiotherapy accidents. In addition, it enables us to conduct efficient and effective quality management in not only advanced radiotherapy such as intensity-modulated radiotherapy and image-guided radiotherapy but also new technology in radiotherapy. It should be noted that treatment process in modern radiotherapy is absolutely more complex and it needs skillful staff and adequate resources. TG-100 methodology could identify weakness in radiotherapy procedure through assessment of failure modes that could occur in overall treatment processes. All staff in radiotherapy have to explore quality management in radiotherapy safety.


Assuntos
Radioterapia Guiada por Imagem , Radioterapia de Intensidade Modulada , Humanos , Risco , Estados Unidos
14.
Nurs Outlook ; 68(2): 162-168, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31607372

RESUMO

BACKGROUND: Screening, Brief Intervention, and Referral to Treatment (SBIRT) is an evidence-based process to recognize and intervene with people who use substances. Despite evidence to support the SBIRT effectiveness, this process is rarely used in acute care. To facilitate use of SBIRT in acute care, it is important to first understand the implementation processes. PURPOSE: To describe SBIRT processes across 14 acute care facilities. METHODS: A phone interview was conducted with site coordinators at 14 facilities to describe their SBIRT process and clinicians involved in each step. FINDINGS: Seven different SBIRT processes were identified for people that use alcohol and/or drugs, and five different processes were identified for people that use tobacco. The function of SBIRT was consistent throughout facilities, but the form of implementation varied based on organizational context. DISCUSSION: Future SBIRT dissemination efforts will need to first understand the local processes and clinicians involved within each facility to tailor implementation to local context.


Assuntos
Cuidados Críticos/normas , Programas de Rastreamento/normas , Guias de Prática Clínica como Assunto , Atenção Primária à Saúde/normas , Encaminhamento e Consulta/normas , Transtornos Relacionados ao Uso de Substâncias/diagnóstico , Transtornos Relacionados ao Uso de Substâncias/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
15.
J Med Syst ; 44(1): 25, 2019 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-31828517

RESUMO

A shift in healthcare payment models from volume toward value-based incentives will require deliberate input into systems development from both perioperative clinicians and administrators to ensure appropriate recognition of the value of all services provided-particularly ones that are not reimbursable in current fee-for-service payment models. Time-driven activity-based costing (TDABC) methodology identifies cost drivers and reduces inaccurate costing based on siloed budgets. Inaccurate costing also results from the fact that current costing methods use charges and there has been tremendous cost shifting throughout health care. High cost, high variability processes can be identified for process improvement. As payment models inevitably evolve towards value-based metrics, it will be critical to knowledgably participate in the coordination of these changes. This document provides 8 practical Recommendations from the Society for Perioperative Assessment and Quality Improvement (SPAQI) aimed at outlining the principles of TDABC, creating process maps for patient workflows, understanding payment structures, establishing physician alignment across service lines to create integrated practice units to facilitate development of evidence-based pathways for specific patient risk groups, establishing consistent care delivery, minimizing variability between physicians and departments, utilizing data analytics and information technology tools to track progress and obtain actionable data, and using TDABC to create costing transparency.


Assuntos
Economia Hospitalar/organização & administração , Assistência Perioperatória/métodos , Melhoria de Qualidade/organização & administração , Fluxo de Trabalho , Custos e Análise de Custo , Prática Clínica Baseada em Evidências , Humanos , Sistemas de Informação/organização & administração , Reembolso de Seguro de Saúde/economia , Relações Interprofissionais , Equipe de Assistência ao Paciente/organização & administração , Assistência Perioperatória/economia , Avaliação de Processos em Cuidados de Saúde , Melhoria de Qualidade/economia , Integração de Sistemas , Fatores de Tempo
16.
Pharmacy (Basel) ; 7(3)2019 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-31480223

RESUMO

Peripheral neuropathy is a neurological disease characterised by pain, numbness, tingling, swelling or muscle weakness due to nerve damage, caused by multiple factors such as trauma, infections and metabolic diseases such as diabetes. In Kuwait 54% of the diabetic population, has peripheral neuropathy. In this exploratory, qualitative study conducted in Kuwait, 25 subjects with peripheral neuropathy took part in one-on-one, semi-structured interviews lasting 45-60 min. Interviews were transcribed, translated into English and coded using NVivo 12. Four individual patient journeys were mapped out in detail, then compared and condensed into a single process map. The remaining 21 interviews were then reviewed to ensure the final map represented all patient journeys. Participants reported similar healthcare pathways for their peripheral neuropathy and faced various difficulties including lack of psychological support, administrative issues (long waiting referral periods, loss of medical documents, shortage of specialists and lack of centralized electronic medical records) and inadequate medical care (shortage of new treatments and deficient follow-ups). Mapping the patient journey in Kuwait showed similar pharmacological treatment to UK guidelines, except that some medicines were unavailable. The map also indicated the need for an integrated referral approach, the use of technology for electronic medical recording and report transmission, alongside education on self-management, coping mechanisms and treatment options for people living with peripheral neuropathy.

17.
J Med Imaging Radiat Sci ; 50(3): 378-386, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31307944

RESUMO

BACKGROUND: At a community cancer center, during weekly quality improvement huddles, the radiation therapy team expressed stress and frustration with the pretreatment pathway for patients requiring palliative radiotherapy. As the department was meeting provincial targets with respect to wait times, it was unknown why the consensus around the department reflected discomfort and stress. METHODS: Four radiation therapists formed a quality improvement project team, intent on utilizing a data-driven improvement cycle to investigate and address opportunities to improve the discomfort around this pretreatment pathway. After defining the process and identifying the customers (the health care providers operating in this pathway), the team conducted interviews with each person, transcribing answers verbatim, and grouping results by discipline. Utilizing the interview themes, each discipline identified one or two priorities to measure, as well as metrics to capture the magnitude and prevalence of these priorities. RESULTS: Each discipline's priorities were measured and analyzed. The identified issues brought forward at the weekly quality improvement huddles were not as prevalent as expected. Minor changes were implemented for priority issues. CONCLUSION: The team focused on the four principles of quality improvement: the patient, team, process, and data to address the expressed discomfort around this specific radiation therapy pathway. The results dispelled some of the myths among teams and provided solutions to areas where minor improvements were required. Utilizing the data, an evidence-informed timeline was validated, encouraging task deadlines to be more evenly distributed across the pathway. Plans to monitor this pathway are being established. The team was successful in contributing to a growing culture of continuous improvement at this community cancer center.


Assuntos
Institutos de Câncer/organização & administração , Procedimentos Clínicos , Cuidados Paliativos/organização & administração , Melhoria de Qualidade/organização & administração , Radioterapia , Institutos de Câncer/normas , Comportamento do Consumidor , Procedimentos Clínicos/organização & administração , Procedimentos Clínicos/normas , Humanos , Cuidados Paliativos/métodos , Cuidados Paliativos/normas , Radioterapia/métodos , Radioterapia/normas
18.
Igaku Butsuri ; 38(2): 62-67, 2018.
Artigo em Japonês | MEDLINE | ID: mdl-30381714

RESUMO

Advanced radiotherapy such as intensity-modulated radiotherapy offers many advantages of high accuracy and efficiency of radiotherapy. To date, many technical guidelines with description of quality assurance and quality control have been reported. However, some reports indicated that human factor and environment is major cause of radiotherapy incidents. If radiotherapy systems depend on automation and computer system, individual risk management is degraded and ability of preventing radiotherapy incidents weaken. Recently, the American Association of Physicists in Medicine (AAPM) task group-100 was reported and it has a new concept guideline, which proposed the comprehensive risk management and education of non-technical skills for overall radiotherapy processes. The TG-100 recommends implementation of process map, reporting system, risk assessment such as failure mode and effects analysis (FMEA) and fault tree analysis (FTA) especially for advanced radiotherapy. In this paper, we described effective and efficient procedures to improve the treatment processes and education of non-technical skills using the such management tools proposed by the TG-100 guide-lines.


Assuntos
Segurança do Paciente , Radioterapia de Intensidade Modulada , Gestão de Riscos , Humanos , Controle de Qualidade , Medição de Risco
19.
Clin Transl Oncol ; 20(3): 330-365, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28779421

RESUMO

PURPOSE: Total skin electron irradiation (TSEI) is a radiotherapy technique which consists of an homogeneous body surface irradiation by electrons. This treatment requires very strict technical and dosimetric conditions, requiring the implementation of multiple controls. Recently, the Task Group 100 report of the AAPM has recommended adapting the quality assurance program of the facility to the risks of their processes. MATERIALS AND METHODS: A multidisciplinary team evaluated the potential failure modes (FMs) of every process step, regardless of the management tools applied in the installation. For every FM, occurrence (O), severity (S) and detectability (D) by consensus was evaluated, which resulted in the risk priority number (RPN), which permitted the ranking of the FMs. Subsequently, all the management tools used, related to the TSEI process, were examined and the FMs were reevaluated, to analyze the effectiveness of these tools and to propose new management tools to cover the greater risk FMs. RESULTS: 361 FMs were identified, 103 of which had RPN ≥80, initially, and 41 had S ≥ 8. Taking this into account the quality management tools FMs were reevaluated and only 30 FMs had RPN ≥80. The study of these 30 FMs emphasized that the FMs that involved greater risk were related to the diffuser screen placement and the patient's position during treatment. CONCLUSIONS: The quality assurance program of the facility has been adapted to the risk of this treatment process, following the guidelines proposed by the TG-100. However, clinical experience continually reveals new FMs, so the need for periodic risk analysis is required.


Assuntos
Elétrons/uso terapêutico , Análise do Modo e do Efeito de Falhas na Assistência à Saúde/métodos , Radioterapia/normas , Humanos , Micose Fungoide/radioterapia , Controle de Qualidade , Radiometria , Radioterapia/métodos , Pele/efeitos da radiação , Neoplasias Cutâneas/radioterapia
20.
Materials (Basel) ; 10(10)2017 Sep 22.
Artigo em Inglês | MEDLINE | ID: mdl-28937633

RESUMO

The resulting properties of parts fabricated by powder bed fusion additive manufacturing processes are determined by their porosity, local composition, and microstructure. The objective of this work is to examine the influence of the stochastic powder bed on the process window for dense parts by means of numerical simulation. The investigations demonstrate the unique capability of simulating macroscopic domains in the range of millimeters with a mesoscopic approach, which resolves the powder bed and the hydrodynamics of the melt pool. A simulated process window reveals the influence of the stochastic powder layer. The numerical results are verified with an experimental process window for selective electron beam-melted Ti-6Al-4V. Furthermore, the influence of the powder bulk density is investigated numerically. The simulations predict an increase in porosity and surface roughness for samples produced with lower powder bulk densities. Due to its higher probability for unfavorable powder arrangements, the process stability is also decreased. This shrinks the actual parameter range in a process window for producing dense parts.

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