4 results about "Fluorescein sodium" patented technology

The invention discloses a video data-based eye surgical incision leakage detection method and system. The method comprises the following steps of: extracting continuous video frame images from a fluorescein sodium dyeing video and segmenting a cornea region; screening video frames based on the set features of the cornea region; forming continuous video blocks by using the screened effective video frames; and based on the video block, judging whether incision leakage occurs and detecting the leakage position. Through accurate segmentation of the cornea area, screening of the video frames, selection and analysis of the continuous video blocks and application of the optical flow algorithm, whether the leakage liquid flowing phenomenon exists in the video or not can be automatically judged, and the flowing source of the leakage liquid, namely the position of a leakage point, is further deduced. According to the technical scheme, the accuracy and efficiency of incision leakage detection after the eye operation can be effectively improved, errors caused by manual inspection are reduced, and timely and accurate feedback is provided for doctors.

The present application belongs to the field of chemical purification, and particularly relates to a method for removing residual solvents in fluorescein sodium, and more particularly, the present application provides a method for removing residual solvents in fluorescein sodium by adding water to the fluorescein sodium containing residual solvents or using moisture in the environment to replace the residual solvents in the fluorescein sodium, and then drying the fluorescein sodium to remove water. The method provided by the present application is simple to operate, easy to realize industrialization, low in cost, green and environmentally friendly, convenient for quality control in the process of drug preparation, and meets the requirements in regulations.

The invention relates to a boron-nitrogen co-doped long-life high-quantum-yield dual-mode afterglow carbon dot and a preparation method thereof.The boron-nitrogen co-doped long-life high-quantum-yield dual-mode afterglow carbon dot is a yellow-green afterglow carbon dot prepared by taking fluorescein sodium as a precursor and boric acid and L-asparaginic acid as a boron source and a nitrogen source through a reaction at 140-220 DEG C. The macroscopic duration of the afterglow carbon dot is not less than 10 s, the photoluminescence quantum yield is not less than 60%, and the afterglow carbon dot has a good application prospect. The afterglow quantum yield is not less than 50%, and the material can be used as a long-afterglow luminescent material to be applied to the field of traffic safety.

The utility model provides a disposable fluorescein sodium staining reagent strip and relates to the technical field of medical instruments. The test strip comprises an outer layer unit, a thin film unit, a separation unit, a test strip and a dyeing reagent, the thin film unit is arranged in the outer layer unit and divides the inner part of the outer layer unit into a first cavity and a second cavity, and the dyeing reagent is arranged in the first cavity; the partition unit is arranged in the second cavity and divides the second cavity into a first space and a second space, the test strip comprises a main body part and a dyeing part which are connected, the main body part is located in the second space, and the dyeing part penetrates through the partition unit to enter the first space. When the test strip is used, a medical worker only needs to crush the thin film unit to fuse the test strip with a dyeing reagent, then tear the disposable outer layer unit and directly take out the wetted test strip, so that a patient can be detected, the operation process is simpler and more convenient, department resources are effectively saved, and convenience is provided for clinical medical work.