RESUMEN
In this study, we proposed a holographic identity verification encryption system that integrates face recognition, air-writing, and the multiple point cloud gridding encryption (M-PCGE) method to ensure multi-level security for objects. The experimental results show that the M-PCGE algorithm proposed in this paper achieves image encryption and decryption quickly with a high degree of restoration, and the security is verified.
RESUMEN
OBJECTIVE: To explore the efficacy of high tibial osteotomy ï¼HTOï¼ combined with medial meniscus centralization in knee osteoarthritis. METHODS: A total of 26 patients who underwent surgery from October 2018 to October 2020 were reviewed. Among them, 14 patients underwent high tibial osteotomy combined with arthroscopic meniscus centralization surgery were centralized group, including 8 males and 6 females, with an average age of ï¼50.2±1.4ï¼ years old and follow-up time of ï¼16.8±4.0ï¼ months. Twelve patients with high tibial osteotomy were in the control group, including 6 males and 6 females, with an average age of ï¼50.9±1.8ï¼ years and follow-up time of ï¼19.0±4.8ï¼ months. Operation time, the knee Lysholm score, knee 2000 IKDC score, MRI, femoral tibial angleï¼FTAï¼, hip knee ankle angle ï¼HKAï¼, and intraoperative and postoperative complications were recorded. RESULTS: All the incisions healed without any complication. The operation time in the centralized group was longer than that in the control group[ï¼65.0±2.1ï¼min vsï¼52.0±2.1ï¼min, P<0.05]. The medial meniscus extrusion reduction value in the centralized group was significantly reduced compared with the control group[ï¼2.8±1.4ï¼ mm vs ï¼1.1±2.2ï¼ mm, P<0.05]. The FTA, HKA, knee Lyshlom score, and 2000 IKDC score between two groups were no significantly ï¼P>0.05ï¼. Postoperative knee Lyshlom score and knee 2000 IKDC score improved in both groupsï¼P<0.05ï¼. CONCLUSION: HTO combined with centralization of medial meniscus can improve the reduction of medial meniscus and improve knee function. The medium and long-term curative effect still needs long-term follow-up of more cases.
Asunto(s)
Osteoartritis de la Rodilla , Masculino , Femenino , Humanos , Persona de Mediana Edad , Osteoartritis de la Rodilla/cirugía , Meniscos Tibiales/cirugía , Resultado del Tratamiento , Articulación de la Rodilla/cirugía , Tibia/cirugía , Osteotomía , Estudios RetrospectivosRESUMEN
SUMMARY: To investigate changes of MMP-9 in the rat spleen and hypoxia-induced microvascular basement membrane under high altitude hypoxia. Thirty male specific pathogen-free Sprague Dawley rats were randomly divided into control and hypoxia groups, with 15 rats in each group. The rats in the control group were placed in Dingxi City, Gansu Province (2080 m above sea level) for 30 days. Rats in the hypoxia group were raised in a hypoxic environment in Maduo County, Qinghai Province (4300 m above sea level), for 30 days to establish a hypoxic rat model. Routine blood tests, MMP-9 mRNA, MMP-9 protein, and the spleen microvascular basement membrane were detected. (1) Compared with the control group, the red blood cell count, hemoglobin, and hematocrit levels of the rats in the hypoxia group were all increased; thus, a hypoxia model was successfully established. (2) Compared with the control group, the expression of MMP-9 mRNA and protein was significantly higher in the spleen of rats in the hypoxic group, and the difference was statistically significant (P <0.05). (3) Compared with the control group, the blood vessel basement membrane in the spleen of the hypoxia group was degraded. Under natural low air pressure and high altitude conditions, the expression of MMP-9 in rat spleen tissue increases and participates in the degradation of the microvascular basement membrane.
El objetivo de este trabajo fue investigar los cambios de la MMP-9 en el bazo de la rata y la membrana basal microvascular inducida bajo hipoxia a gran altura. Treinta ratas macho Sprague Dawley, libres de patógenos específicos, se dividieron aleatoriamente en dos grupos de 15 ratas cada uno, un grupo control y un grupo hipoxia. Durante 30 días las ratas del grupo control estuvieron en la ciudad de Dingxi, provincia de Gansu (2080 m sobre el nivel del mar). Las ratas del grupo de hipoxia se criaron en un entorno hipóxico en el condado de Maduo, provincia de Qinghai (4300 m sobre el nivel del mar), durante 30 días para establecer un modelo de rata hipóxica. Se realizaron análisis de sangre de rutina, ARNm de MMP-9, proteína MMP-9 y de la membrana basal microvascular del bazo. En comparación con el grupo control, el recuento de glóbulos rojos, la hemoglobina y los niveles de hematocrito de las ratas del grupo de hipoxia aumentaron; por lo tanto, se estableció con éxito un modelo de hipoxia. En comparación con el grupo control, la expresión de ARNm y proteína de MMP-9 fue significativamente mayor en el bazo de las ratas del grupo hipóxico, siendo la diferencia estadísticamente significativa (P <0,05). En comparación con el grupo control, la membrana basal de los vasos sanguíneos estaba degradada en el bazo del grupo hipoxia. En condiciones naturales de baja presión atmosférica y gran altitud, la expresión de MMP-9 en el tejido del bazo de la rata aumenta y participa en la degradación de la membrana basal microvascular.