[Analysis on personal protection in occupational population at high risk for brucellosis and influencing factor in China]

Objective: To understand the current status of personal protection in occupational population at high risk for brucellosis in China and provide evidence for the evaluation of implementation of National Brucellosis Prevention and Control Plan (2016-2020). Methods: Four counties in Shanxi Province and Xinjiang Uygur Autonomous Region were selected to conduct a questionnaire survey in occupational population at high risk for brucellosis from December 2019 to July 2020 by using cross-sectional survey methods. Results: A total of 2 384 persons at high risk for brucellosis were surveyed, and the standardized utilization rate of personal protective equipment (PPE) was 20.13% (480/2 384). The utilization rate of glove, mask, rubber shoe, and work cloth were 38.26% (912/2 384), 31.80% (758/2 384), 32.01% (763/2 384) and 30.87% (736/2 384),respectively. There were significant differences in the utilization rate and standardized utilization rate of the four types of PPE among populations in different age, occupation, educational level and area groups (all P<0.001). The utilization rate and standardized utilization rate of PPE were lower in people over 60 years old, women, farmers, and those with lower educational level. The results of multivariate analysis showed that occupation and area were the influencing factors for the standardized utilization of PPE, the standardized utilization rates of PPE were higher in herdsmen and veterinarians. The standardized utilization rate of PPE in Yanggao County and Huocheng County was significantly higher than that in Zuoyun County and Hunyuan County. Conclusions: The utilization rate of the four types of PPE in occupational population at high risk for brucellosis was not high in China, and the standardized utilization rate was low, lower than the requirement in National Brucellosis Prevention and Control Plan, and there were significant differences among different areas. It is urgent to distribute PPE to occupational population at high risk for brucellosis and carry out health education about PPE utilization. Meanwhile, it is necessary to strengthen information exchange or sharing among different areas.

Prosthetic reconstruction of the trachea in rabbit

BACKGROUND

Various tracheal reconstruction techniques have been developed for stenosis. Different types of grafts, flaps and synthetic materials have been used for reconstruction of the defect when primary anastomosis was unsuccessful or not indicated. The mentioned reconstruction methods have limited success. Polytetrafluoro-ethylene (PTFE) prosthesis is a microporous polymer and has been applied for implantation on a wide range. It is also appropriate for tracheal reconstruction.

METHODS

In the present study, segmental defects were created in 12 New Zealand rabbits. The rabbits were divided into 2 subgroups; the first group was applied an end-to-end anastomosis whilst the second a PTFE prosthesis. After 2 months, these applications were compared clinically, endoscopically and histopathologically to each other.

RESULTS

Necrosis and extrusion were not observed in the rabbits with PTFE applications. After 1 month, the tracheal stenosis was found on endoscopic examination in 5 animals in the first group and 2 animals in the second group. While in longer defects, end-to-end anastomosis causes tracheal tension, PTFE applications have been well tolerated.

CONCLUSIONS

It is concluded that PTFE prosthesis is a suitable alternative method in reconstruction of circumferential tracheal defects.

Papillary carcinoma in a thyroglossal duct remnant with normal thyroid gland

Carcinoma in the thyroglossal duct remnant is relatively uncommon. Since the first report by Uchermann (1915), more than 150 cases of carcinoma have been reported, and the majority have been papillary thyroid carcinomas (Li Volsi et al., 1974; McNicol et al., 1988). In this report, we present a case of papillary carcinoma in the thyroglossal duct with a normal thyroid gland.

The effect of peritonsillar infiltration on intra-operative blood loss in children

Infiltration of the peritonsillar space in one group of patients with lidocaine 0.5% containing epinephrine (Group I) and with normal saline in another (Group II) did reduce the intra-operative blood loss significantly compared to the control group (Group III) who did not get any injections. The benefits of reducing intra-operative blood loss in children is discussed.

Bilateral congenital choanal atresia at age 16: an interesting case

A bilateral congenital posterior choanal atresia case diagnosed at the age of 16 is presented. Although bilateral congenital choanal atresia causes acute life-threatening respiratory obstruction in newborns, this case was able to compensate by rapidly learning mouth breathing and the diagnosis did escape detection for years. The patient was treated successfully via transpalatal approach.

Nasopharyngeal teratoma as a respiratory emergency in the neonate

We report a congenital nasopharyngeal teratoma which presented as acute neonatal airway obstruction. After immediate orotracheal intubation, a pedunculated mass, which filled the nasopharyngeal and oropharyngeal cavities, was completely removed. Histological examination of the specimen revealed as a mature teratoma, composed of all three germ layers with recognizable early organ differentiation.

[Pneumocele of the frontal sinus]

Pneumosinus dilatans frontalis is a rare condition of the frontal sinus. Although the aetiologic mechanism is not yet known, it is presumed that an increased intrasinusal pressure due to a check valve mechanism is responsible for this condition. By measuring intrasinusal pressure we demonstrated this mechanism.