RESUMO
Water freezing is a crucial physical phenomenon. The process of ice formation, and the estimation of the ice nucleation rate also have important applications. However, until now, the experimental phenomenon of rapid freezing of water in nanoseconds has not been fully explained theoretically, and the physics underlying the experimental phenomenon has still not been revealed. In this work, combining classical nucleation theory with Mie theory, a kinetic model is developed that reproduces for the first time the experimental phenomenon of decreasing transmissivity. The process of ice formation (nucleation, growth and engulfment) has been revealed. In the process of theoretical derivation, the Zel'dovich-Frenkel (ZF) equation is developed, indicating a limit to the phase transition driving force |Δµ|/(kBT) ≤ 1. By analyzing the experimental and simulation results, it is suggested that the change in the transparency of the sample may be caused by the ice/vacuum interface scattering. In addition, during the rapid phase transition, it was found that the phase transition continues to occur even after phase fraction normalization. Finally, the approximate formula between the nucleation rate and sample transparency is given. This formula can predict the change of sample transparency during phase transition and provides a way to measure the nucleation rate. The results presented here give an insight into the phase transition kinetics, and the methodology may also work for the phase transitions of other materials.
RESUMO
Background: The standard treatment for bladder cancer (BC) is transurethral resection (TURBt), intravesical chemotherapy, and regular follow-up cystoscopy after surgery. However, some patients experience relapse or progression. Narrative care refers to a nursing model in which nurses put themselves into the patient's position through communication and listening, thereby alleviating the patient's negative emotions. This study analyzed narrative nursing interventions in elderly patients with BC after vesicoileal replacement. Objective: To explore the positive stimulating effect of narrative nursing intervention on the sense of shame in elderly patients with bladder cancer (BC) after ileal bladder replacement. Methods: A total of 60 elderly patients with BC who went through ileal replacement of the bladder from February 2019 to April 2021 in our hospital were enrolled. The patients were divided into the control group and the study group by the arbitrary number table method. The former group received routine care, and the latter group received a narrative nursing intervention model. The nursing satisfaction, stigma score, self-care ability score, SAS score, SDS score, and quality of life score were compared. Results: First, we compared the nursing satisfaction. In the research group, 23 cases were very satisfied, 6 cases were satisfied, and 1 case was normal, and the satisfaction rate was 100.00%. In the control group, 13 cases were very satisfied, 8 cases were satisfied, 4 cases were general, and 5 cases were dissatisfied, with a satisfaction rate of 83.33%. The nursing satisfaction of the research group was significantly higher compared to that of the control group (P < 0.05). Secondly, we compared the stigma scores. The stigma scores of the study group at the time of discharge, 1 month, 3 months, and 6 months after discharge were lower compared to those of the control group (P < 0.05). In terms of the scores of self-care ability, the total scores of self-concept, self-care responsibility, self-care knowledge, self-care skills, and self-care ability of the research group were higher compared to those of the control group (P < 0.05). With regard to SAS scores, before nursing, there was no significant difference exhibited (P > 0.05). After nursing, the patient's SAS score decreased. Compared with the two groups, the SAS scores of the study group at discharge, 1 month, 3 months, and 6 months after discharge were all lower (P < 0.05). In terms of SDS score, there was no significant difference before nursing (P > 0.05). After nursing, the SDS scores of patients decreased. Compared between the two groups, the SDS scores of the study group at the time of discharge, 1 month, 3 months, and 6 months after discharge were lower (P < 0.05). Finally, we compared the life quality scores. Before nursing, there was no significant difference exhibited (P > 0.05). After nursing, the scores of life quality of patients improved. Compared with the two groups, the physical function, psychological function, social function, and healthy self-cognition scores of the research group were all lower compared to those of the control group (P < 0.05). Conclusion: Narrative nursing can reduce anxiety and depression in elderly patients with BC after ileal replacement of the bladder, enhance the quality of life, reduce the patient's stigma, and play a positive motivating role. This nursing model is worthy of promotion in clinic.