Retroactive signing of economic contracts poses significant economic risks and potential hazards, and may harm the interests of the hospital and trigger corruption risks. A certain tertiary public hospital analyzed 41 backdated contracts out of 282 economic contracts signed from January to June 2023 to determine the reasons for contract retrosigning, and proposed targeted countermeasures in terms of personnel management, emergency procurement project management, and management of project initiation, contract drafting, approval, and signing. Since September 2023, by improving relevant management systems, optimizing and standardizing various processes, and strengthening the application of performance assessments, the issue of economic contracts retrosigning has been effectively resolved, reducing the risk hazards in the hospital′s economic activities, which can provide a reference for the economic contract management of public hospitals.

Objective:To develop a new type of detection window protective device for surface contamination monitor,and to verify its testing effect.Methods:The new type of surface contamination monitor detection window protection device was composed of the protective film and fixed frame,which was of integrated design and one-off production.The protective film was made of transparent flat Myra film,thickness≤2.5μm,the fixed frame was a rectangular hollow structure surrounded by four edges and provided with a working surface and a mounting surface.The protective film was pasted on the inner wall of the working surface of the fixed frame by adhesive,and the protective film and fixed frame were installed on the outside of the detection window of the surface contamination monitor by means of fixing buckles.Two commonly used surface contamination detection instruments,RDa150 and Como170,were selected to measure artificial radiation sources under three protection states:no film protection,plastic wrap protection and new protection device to test the detection efficiency and operability of the new surface contamination monitor's detection window protection device.Results:Compared with the traditional protective measures of plastic wrap,the detection efficiency of α,β and γ rays was more effectively ensured by the new detection window protective device for surface contamination monitor,and the detection efficiency of α rays was increased from about 40%to about 70%.Conclusion:The new detection window protection device for surface contamination monitor can significantly improve the detection efficiency of radioactive contamination,especially alpha-ray pollution,and effectively protect the instrument and equipment,and effectively improve the detection efficiency of surface contamination detection operators.

In order to maximize the detection efficiency of the surface contamination detector on α rays and make up for the problems of insufficient protective measures of the detector,a new detection window protection device for wound contamination detector was designed.The device was consisted of a protective film and a fixed frame sleeve.The protective film was made of a transparent flat Mylar film with a thickness of≤2.5 μm and a circular shape.Its diameter matched the detection surface diameter of the wound radiation measuring instrument probe and can be used in combination with the appropriate model of wound radiation measuring instrument probe.The sleeve was provided with a closed end and an open end,the protective film was fixed on the inner side of the closed end of the sleeve,and the open end of the sleeve was provided with an annular fixing buckle,so that the sleeve can be firmly installed on the probe of the disposable wound radiation measuring instrument.After installation,the protective film can be closely attached to the detection surface of the probe of the wound radiation measuring instrument.Two commonly used contamination detectors were selected to measure the artificial radioactive sources under three protection conditions:film-free protection,plastic wrap protection and new protective devices,and the detection efficiency and operability of the detection window protection device of the new wound contamination detector were tested.The results showed that compared with the traditional protective measures of plastic wrap,the new device can significantly improve the detection efficiency of wound radioactive contamination,especially α contamination,and effectively protect the instrument and equipment,and improve the detection efficiency of wound pollution operators.