Well-type thick-shell quantum dots combined with double hole transport layers device structure assisted realization of high-performance quantum dot light-emitting diodes.

Quantum dot (QD) light-emitting diodes (QLEDs) are promising for next-generation lighting and displays. Considering the optimization design of both the QD and device structure is expected to improve the QLED's performance significantly but has rarely been reported. Here, we use the thick-shell QDs combined with a dual-hole transport layer device structure to construct a high-efficiency QLED. The optimized thick-shell QDs with CdS/CdSe/CdS/ZnS seed/spherical quantum well/shell/shell geometry exhibit a high photoluminescence quantum yield of 96% at a shell thickness of 5.9 nm. The intermediate emissive CdSe layer with coherent strain ensures defect-free growth of the thick CdS and ZnS outer shells. Based on the orthogonal solvents assisted Poly-TPD&PVK dual-hole transport layer device architecture, the champion QLED achieved a maximum external quantum efficiency of 22.5% and a maximum luminance of 259955 cd m-2, which are 1.6 and 3.7 times that of thin-shell QDs based devices with single hole transport layer, respectively. Our study provides a feasible idea for further improving the performance of QLED devices.

[Transformation Path of Clinical Research Achievements and Its Application in Medical Equipment Management under Background of Multi-agent Collaborative Innovation].

By studying the current situation of multi-agent collaborative innovation and clinical achievements transformation at home and abroad, it is clear that multi-agent collaborative innovation is the only way for clinical research achievements transformation under the current background. This paper proposes a set of transformation path of clinical research achievements based on the multi-agent collaborative innovation platform of "production, teaching, research and medicine", which is supported by policy guidance and innovation management, and explore the role of equipment management department in achievement transformation.

[Research on Cost Control and Rationalization Application Supervision of Medical Equipment Consumables Based on Analytic Hierarchy Process].

OBJECTIVE: To analyze the medical equipment operation data of 44 clinical departments in the hospital from three aspects: materials and consumables, operation and maintenance depreciation, and operation management. METHODS: To formulate the evaluation standards and scoring criteria for the operation indicators, the lowest score is 0 points, and the highest score is 5 points. Based on the operation indicators of medical equipment, establish a hierarchical structure model, determine the criterion layer and sub-criteria layer, construct a judgment matrix, normalize it, and calculate the weight coefficient. RESULTS: Count equipment operation data in 2021 and 2022. Score according to the assessment standards, assign weights through the analytic hierarchy process, calculate the total score and sort, and making a special analysis on the top 10 departments and departments with a score below 4 points, and formulate a rectification plan. CONCLUSIONS: The establishment of index assessment standards and the weight distribution of AHP can effectively enhance the control of equipment operating costs.

[The Clinical Status and Process of Hydrosurgery System].

This paper reviews the principle and clinical application of hydrosurgery system, including the burn debridement, diabetic foot wounds debridement and other trauma debridement. Meanwhile, this paper introduces the development direction of waterjet technology. Furthermore, the safety, effectiveness and suitability can be discussed.

[Assessment of Technology and Clinical Application of Hydrosurgery System].

This paper introduces the technical features of hydrosurgery system and evaluates it from three aspects:safety and effectiveness, economy and technology maturity. The evaluation results show that the safety and effectiveness are high, and the safety mainly involves the misuse of the system, which cause the adverse events. A large number of literatures have proved that the system is more suitable for the debridement of fine parts. It is estimated that hydrosurgery system has better economic performance, but the cost and patients' cost is also increased correspondingly. In the aspect of technology maturity assessment, this technology is a patented technology, and the number of published papers both at home and abroad is on the rise, indicating that the initial application of the technology is better and the technology is in infancy stage. Therefore, hydrosurgery system has certain advantages in all aspects. Hospitals need to allocate the equipment according to their own needs and clinical application, while a wider range of clinical trials is needed to provide evidence-based evidence for clinical applications and promotion.

[Satisfaction Evaluation and Ten Years Practical Application of the After-sale Service of Medical Equipment].

In terms of service management in the medical equipment field, Medical Equipment after-sale Service Satisfaction Evaluation System is established through expert consultation and sample experiment. Meanwhile, questionnaire survey has been applied to local service satisfaction survey work among equipment managements and clinical departments in seventy second and third grade hospitals in Shanghai in ten consecutive years. The result indicates that the satisfaction index has been growing slightly and stably, which clearly demonstrates that the evaluation has continually boosted the service work of various mainstream suppliers. And overall, the evaluation has played an active role in safeguarding and motivating the safety and effectiveness of medical equipment.

[Analysis and Control of Endoscopic Security Risk in Digital Integrated Environment].

Taking Endoscopy in hospitals as the research object, study on the safety risk characteristics in digital integration environment. On the basis of risk analysis, risk prevention and control measures are proposed from personnel, equipment, water and electricity, disinfection and the surrounding environment. Establish the endoscope safety risk management safeguard system to improve the safety risk management level of endoscopy.

[Research on the impact of metal implants with different materials on radiation dose distribution].

OBJECTIVE: To investigate the impact of metal implants with different materials on radiation dose distribution based on film measurement method. METHODS: Titanium plate, titanium intramedullary pin and stainless steel plate were set into phantom and irradiated separately by 6 MV and 15 MV X ray from linear accelerator. Dose distributions derived from different materials metal implants were measured and analyzed by film dosimeter. RESULTS: For 6 MV X ray, the maximum interface dose increments of titanium plate, titanium intramedullary pin and stainless steel plate were 12.3%, 15.4% and 20.3%. As the radiation energy was increased from 6 MV to 15MV, the maximum interface dose increment of the titanium plate rose from 12.3% to 15.1%, the maximum interface dose increment of the steel plate rose from 20.3% to 30.8%. CONCLUSIONS: Metal implants with different materials have obvious impact on radiation dose distribution. With the increase of the metal atomic number and energy of radiation, the degree of elevated dose also increases. These results suggest that correction of dose distribution is required for radiotherapy of patients with metal implants.

[Hospital clinical engineer orientation and function in the maintenance system of hospital medical equipment].

The quantity of medical equipment in hospital rise quickly recent year. It provides the comprehensive support to the clinical service. The maintenance of medical equipment becomes more important than before. It is necessary to study on the orientation and function of clinical engineer in medical equipment maintenance system. Refer to three grade health care system, the community doctors which is called General practitioner, play an important role as the gatekeeper of health care system to triage and cost control. The paper suggests that hospital clinical engineer should play similar role as the gatekeeper of medical equipment maintenance system which composed by hospital clinical engineer, manufacture engineer and third party engineer. The hospital clinical engineer should be responsible of guard a pass of medical equipment maintenance quality and cost control. As the gatekeeper, hospital clinical engineer should take the responsibility of "General engineer" and pay more attention to safety and health of medical equipment. The responsibility description and future transition? development of clinical engineer as "General Engineer" is discussed. More attention should be recommended to the team building of hospital clinical engineer as "General Engineer".

[Application of digital images in quality assurance of radiotherapy].

The application of KV, MV real-time digital images and 3D reconstructed radiography in quality assurance of radiotherapy, provides effective means to verify the beam center and therapeutic range, calibrate the positioning accuracy and inspect the characteristics of radiotherapy equipment and radiation physics, greatly improves the quality and accuracy of radiotherapy.

[The application of total quality management (TQM) in quality management of radiation therapy].

The strategies and methods of the total quality management (TQM) need to applied in quality management of radiation therapy. We should improve the level of quality control and quality assurance in radiation therapy. By establishing quality control system in radiation therapy, standardization of radiation therapy workflow, strengthening quality control of devices and physical technique and paying attention to safety protection and staff training.

[Applications of the digital network in radiotherapy].

Construction of the digital radiotherapy network is the need of contemporary radiotherapy, and is also an important part of the construction of a modernized hospital. This article analyzes the basic technical requirements and functions of the digital radiotherapy network, and gives opinions on the application of the digital radiotherapy network.

Intraoperative radiotherapy in the combination of adjuvant chemotherapy for the treatment of pT3N0M0 rectal cancer after radical surgery.

OBJECTIVES: The role of chemoradiotherapy in patients with pT3N0M0 rectal cancer is controversial. Intraoperative radiotherapy (IORT) has the ability to deliver a high, single-fraction radiation dose to tumor bed with minimal exposure of surrounding tissues. On the basis of the literature, the local failure pattern occurs mostly in the presacral-perineal space rather than the regional lymph node after adjuvant chemoradiation for T3N0 rectal adenocarcinoma. Our aim was to evaluate the efficacy of IORT followed by adjuvant chemotherapy in the treatment of pT3N0M0 rectal adenocarcinoma. MATERIALS AND METHODS: A total of 91 consecutive patients with newly diagnosed pT3N0M0 well-differentiated and moderately differentiated rectal adenocarcinoma were enrolled: 46 patients received adjuvant concurrent chemoradiotherapy (external beam radiotherapy [EBRT group]) and 45 patients received IORT (dose range, 15 to 25 Gy), followed by identical systemic chemotherapy (IORT group). RESULTS: The 5-year locoregional control rate, overall survival, and disease-free survival were 86%, 86%%, and 73% in the EBRT group versus 84%, 84%, and 71% in the IORT group, respectively (P>0.05). Compared with the EBRT group, the incidence of acute grade 3 toxicity was significantly lower in the IORT group than in the EBRT group (P<0.05). There were no severe late complications observed in the IORT group. CONCLUSIONS: IORT followed by adjuvant chemotherapy for pT3N0M0 rectal adenocarcinoma provided a similar outcome in terms of local control, overall survival, and disease-free survival, as compared with concurrent chemoradiotherapy after surgery. However, no significant acute or late complications were observed in patients treated with IORT. Further investigation, preferably in a prospective manner, is warranted to confirm the efficacy of IORT in the treatment of nonmetastatic T3 rectal cancer.

Adjuvant chemoradiotherapy with or without intraoperative radiotherapy for the treatment of resectable locally advanced gastric adenocarcinoma.

PURPOSE: To document the long-term efficacy of intraoperative electron radiotherapy (IOERT) followed by concurrent chemotherapy and external-beam radiotherapy (EBRT) in the management of locally advanced gastric cancer. MATERIALS AND METHODS: A total of 97 consecutive patients with T3/4 or N+ gastric adenocarcinoma were enrolled. Fifty-one patients received adjuvant chemoradiotherapy (EBRT group) and 46 received IOERT (dose range, 12-15 Gy) followed by chemoradiotherapy (EBRT+IOERT group). RESULTS: The 5-year locoregional control rates were 50% and 35% in the two groups with or without IOERT, respectively (p=0.04). Two patients had recurrence within the IOERT field in the EBRT+IOERT group and 14 patients recurred in the same area in the EBRT group (p=0.02). Multivariate analyses revealed that adjuvant IOERT was an independent prognosticator for both local-regional control (p=0.02) and disease-free survival (p=0.05). G3/4 late toxicity was observed in 5 patients in the EBRT+IOERT group, but none in the EBRT group (p=0.02). CONCLUSIONS: Higher radiation dose may contribute to the improvement of local control, especially in the field encompassed by IOERT. The addition of IOERT to surgery and adjuvant chemoradiation deserves further investigation in a randomized trial.