[Robotic-assisted laparoscopic modified ventral onlay lingual mucosal graft in complex ureteral stricture construction: experience of eight cases]

Objective: To examine the efficacy of robot-assisted laparoscopic modified ventral onlay lingual mucosal graft for complex ureteral stricture. Methods: The clinical data of 8 patients with ureteral stricture admitted to the Department of Urology, General Hospital of Southern Theater Command from May to October 2022 were retrospectively analyzed. There were 6 males and 2 females, aged (45.1±10.2) years (range: 34 to 64 years), body mass index (24.6±2.0) kg/m2 (range: 20.7 to 26.6 kg/m2). Five cases on the left side, 3 cases on the right side, the length of the ureteral structure was (3.1±0.7) cm (range: 2.2 to 4.5 cm). The value of preoperative serum creatinine was (113.8±22.3) μmol/L (range: 96 to 15 μmol/L). Before excising the structure segment, the titched anastomosed part of the dorsal wall of the ureter, and then the posteriorly augmented anastomotic, the remaining ventral side was augmented with a onlay lingual mucosa graft, then the omentum flap was used to wrap the reconstructed ureteral segment. The lingual mucosa graft with a length of 2.5 to 5.0 cm and a width of 1.0 to 1.5 cm was cut according to the actual structure. The surgery information of the patient, complications, and recent follow-up were recorded. Results: The operation under robot-assisted laparoscopy was performed successfully in the 8 patients without conversion to open surgery. The duration of the operation was (226.9±22.8) minutes (range: 210 to 255 minutes), estimated blood loss was (93.8±25.9) ml (range: 75 to 150 ml), the retention time of the postoperative drainage tube was (4.8±1.3) days (range: 3 to 7 days), and the duration of postoperative hospitalization was (11.1±3.6) days (range: 9 to 14 days). One week after the operation, the patient could pronounce correctly, enunciate clearly, and eat normally. Double J tubes were removed 4 to 8 weeks after the operation. The follow-up time in this group was 3 to 9 months, the follow-up patients underwent imaging and other examinations, which showed a significant improvement in hydronephrosis on the affected side, and the value of renal pelvic separation on the affected side was (1.4±0.8) cm (range: 0 to 2.3 cm). The serum creatinine value was (100.1±24.9) μmol/L (range: 76 to 155 μmol/L). Three months after the operation, the ureteroscopy showed that the ureter was smooth and the mucosa was normal. Conclusions: Robot-assisted laparoscopic ureteroplasty with a lingual mucosal graft is a safe and feasible operation for complex ureteral stricture without serious complications, which provides a surgical option for repairing ureteral stricture.

[Incidence and trend of occupational diseases in a district of Beijing from 2004 to 2017]

Objective: To investigate the incidence of occupational diseases in a District of Beijing, from 2004 to 2017 and to analyze the distribution characteristics and incidence trends of occupational diseases. Methods: The data of confirmed occupational disease cases data in the occupational disease and occupational health information monitoring system in a district of Beijing from 2004~2017 were collected to analyze the incidence and trends of occupational diseases. Results: In 2004~2017, a total of 161cases of occupational diseases were reported in a district of Beijing, mainly pneumoconiosis (113 cases, 70.19%) . The average age of onset of pneumoconiosis was (51.65 ±11.10) years old, and the average age of dust exposure was (13.14±8.07) years, mainly including silicosis accounting for 85.84%, concentrated in small collective enterprises. Pneumoconiosis was mainly female, with 80 cases accounting for 70.80% of the disease; most of the working years were 10-20 years, the age of onset of dust pneumoconiosis and the duration of dust exposure were statistically different (P<0.05) ; The distribution of pneumoconiosis industry was concentrated on the manufacture of jewellery and related articles in 91cases (80.53%) , Compared with the non-jewellery and related articles manufacturing industry, the average age of onset were statistically significant (P<0.05) . Occupational diseases other than pneumoconiosis were mainly male; occupational ear, nose and throat (ENT) and oral disease male accounted for 86.96% of the disease, mainly concentrated in small enterprises, state-owned enterprises, the majority of working years wereconcentrated in 20~30 years; occupational infectious diseases accountded for 93.33% of the disease, mainly concentrated in small collective enterprises, most of the working years were less than 10 years. Conclusion: Occupational diseases in a district of Beijing are mainly pneumoconiosis, mainly in small collective enterprises, mostly historical issues, the number of reports of occupational ENT and oral disease and occupational infectious diseases are increasing, it is important to strengthen supervision and protect the health of workers.

[Epidemiological and clinical characteristics of 109 patients with crayfish-related rhabdomyolysis]

A total of 109 in patients with crayfish-related rhabdomyolysis were enrolled in our hospital from July to August 2016,including 31.2%(34/109)males and 68.8% (75/109)females.The number of home-cooked crayfish accounted for 60.6% (66/109). Main symptom was back pain 96.3% (105/109). The misdiagnosis rate was 15.6% (17/109). On day 1, 2, 3 after admission and the day before discharge,serum creatine kinase were 1 175(446, 2 258)IU/L,3 710(2 137, 8 875)IU/L,1 899(1 063, 4 595)IU/L and 317(152, 532)IU/L,respectively(P<0.001).Serum myoglobin were (603±484)μg/L,(313±284)μg/L,(104±74)μg/L and (55±20)μg/L,respectively(F=39.1, P<0.001).Females were more susceptible to crayfish-related rhabdomyolysis. Home-cooked crayfish is prone to induce rhabdomyolysis and easily to be misdiagnosed. Creatine kinase and myoglobin showed characteristic dynamic changes.

White Light Emission and Luminescence Dynamics in Eu³⁺/Dy³⁺ Codoped ZnO Nanocrystals

In order to expand the use of ZnO in advanced display and lighting device applications, such as distinguishable emissive flat panel displays and liquid crystal display backlights, Eu³⁺/Dy³⁺-codoped ZnO nanocrystals were synthesized using a low temperature wet chemical doping technique and chemical surface modification. X-ray diffraction patterns revealed that co-doping Eu³⁺ and Dy³⁺ does not change the wurtzite structure of ZnO. A high-resolution TEM image showing obvious lattice fringes confirmed the high crystallinity of the nanosized sample. The luminescence and dynam- ics of Eu³⁺/Dy³⁺-codoped ZnO nanocrystals of various doping concentrations were studied under ultraviolet excitation. Excitation into the ZnO conduction band was also studied. ZnO doped with Eu³⁺ and Dy³⁺ ions exhibited a strong blue (483 nm) emission from the ⁴F₉/₂ --> ⁶H₁₅/₂ transition of Dy³⁺ ions, a yellowish-green (575 nm) emission from the ⁴F₉/₂ --> ⁶H₁₃/₂ transition of Dy³⁺ ions and a red (612 nm) emission from the ⁵D₀ --> ⁷F₂ transition of Eu³⁺ ions, without a defect background. Undoped ZnO emitted a broadband green light, demonstrating an efficient energy transfer from the ZnO host to the Eu³⁺ and Dy³⁺ ions. Moreover, energy transfer from the Eu³⁺ ions to the Dy³⁺ ions in the ZnO host was also observed by analyzing luminescence decay curves. The luminescence dynamics of the Eu³⁺/Dy³⁺-codped ZnO sample indicate that as the Eu³⁺ concentration increased, both the rise and the decay time constants of the ⁴H₉/₂ level of the Dy³⁺ ions became longer, while the decay time constants of the ⁵D₀ level of the Eu³⁺ ions became shorter, suggesting an energy transfer from the Eu³⁺ ions to the Dy³⁺ ions in the ZnO host. Furthermore, by adjusting the doping concentration ratio of Eu³⁺ and Dy³⁺ ions, the Eu³⁺/Dy³⁺-codoped ZnO phosphors emitted strong white luminescence with a high color purity and high color rendering index. The results indicate that the Eu³⁺/Dy³⁺-codoped ZnO phosphors are promising light-conversion materials, and have the potential to be used in field emission display devices and LCD backlights.