Objective: Combined with the metrological verification in order to strengthen the quality control of medical ultrasonic diagnostic instrument, to ensure the image quality of instruments and medical safety. Methods: Measure output sound intensity, patient leakage current, metrological verification parameters detection depth, resolution, geometric position error value, cystic focal diameter error, blind area and so on. Results: Through analyzing the data of metrological verification results, and in combination with the practical situation of hospital ultrasonic diagnostic instrument calibration, approved metrological verification instrument performance detection technology as the basis. Conclusion: The combination of metrological verification, strengthen training, maintenance, etc, to ensure the operation and safety of instruments, to achieve good quality control in the device.

OBJECTIVE: To study a new surgical approach for cochlear implantation. METHOD: We operated on 8 cadaver heads (16 side) use Suprameatal approach for cochlear implantation, describe related anatomic mark. RESULT: The electrode is passed through the suprameatal tunnel, the EAC groove, the space underneath the chorda tympani between the malleal and the long process of the incus, and the cochleostomy. Angle between tunnel and temporal imaginary line is 28.0 degrees +/- 1.3 degrees in adult, 29.0 degrees +/- 1.7 degrees in children, the location of inserting electrode into cochleostomy is (1.31 +/- 0.13) mm to round window in adult, (1.19 +/- 0.12) mm in child. CONCLUSION The SMA approach is a safe technique, maintaining a safe distance to facial nerve and chorda tympani. So We should make right decision in clinic.
Adult ; Child ; Chorda Tympani Nerve ; anatomy & histology ; Cochlear Implantation ; methods ; Ear Canal ; anatomy & histology ; surgery ; Facial Nerve ; anatomy & histology ; Humans ; Round Window, Ear ; anatomy & histology

Objective: To investigate the clinical value of blood routine tests (RT) and coagulation function in differential diagnosis of mild and severe patients infected with bunyamwera virus. Methods: Twenty-five mild patients and 25 severe patients infected with bunyamwera virus were selected and their blood RT and coagulation function tests were performed. Results: The earliest prothrombin time (PT-early) and activated partial thromboplastin time(APTT-early) were significantly lower than those of severe patients(t=-2.43, P<0.05; t=-2.53, P<0.05). The lowest values of white blood cells (WBC-low) of mild patients were significantly higher than those of severe patients (t=5.66, P<0.01). The highest value of D-dimer (DD-high) of mild patients were significantly lower than that of severe patients (z=1.35, P<0.05). When mild patients values were set as outcome variable, AUC of APTT-early was the highest (AUC=0.713, P<0.05). When values of severe patients were set as outcome variable, AUC of DD-high was the highest (AUC=0.874, P<0.01). Conclusions APTT-early and DD-high are suitable for differential diagnosis of mild and severe patients infected with bunyamwera virus.

Background Organic ultraviolet (UV) filters are widely used in personal care products. So far, relevant studies on organic UV filters in indoor dust have been reported. Objective This study aims to establish a thermal desorption combined with gas chromatography-mass spectrometry (TD-GCMS) method to identify organic UV filters in indoor air collected from different indoor environments, so as to reveal the pollution levels and characteristics of organic UV filters in indoor environment. Methods Based on the standard indoor air sampling protocol, a total of 60 samples were collected from eight different kinds of indoor environments (male and female dormitory rooms, offices, labs, barber shops, printing shops, hotels, and private cars) on and nearby Minhang Campus of Shanghai Jiao Tong University from August to November, 2020. The concentrations of six common organic UV filters, including homosalate (HMS), 2-ethylhexyl salicylate (EHS), 3-(4-methylbenzylidene)-camphor (4-MBC), isoamyl 4-methoxycinnamate (IMC), octocrylene (OC), and octyl 4-methoxycinnamate (EHMC), in the air of different indoor environments were detected by TD-GCMS. Furthermore, the correlations of individual organic UV filters in different indoor environments were analysed. Results Under optimized detection conditions, the correlation coefficients of the quantitative standard curves of selected six organic UV filters were all at or above 0.997. The relative standard deviations of 1 mg·L⁻³ samples ranged from 1.74% to 7.11%, and the recoveries ranged from 67.17% to 106.5%. The relative standard deviations of 10 mg·L⁻³ samples ranged from 3.59% to 8.76%, and the recoveries ranged from 78.80% to 126.60%. The detection rates of the other five organic UV filters except IMC were all at or more than 92% in eight different kinds of indoor air. The median concentration of total organic UV filters was 75.17 ng·m⁻³, and EHS presented the highest median concentration of 28.55 ng·m⁻³. Regarding different indoor environments, the highest concentration of total organic UV filters was found in the female dormitory samples, 154.98 ng·m⁻³. The respective pair-analysis among HMS, EHMC, OC, and EHS of all indoor air samples reached a significant level of correlation (r=0.40-0.61, P<0.01). Conclusion The TD-GCMS method is satisfactory for the determination of organic UV filters in indoor air. EHS, EHMC, HMS, OC, and 4-MBC are identified in selected eight indoor environments, and they may have similar sources of pollution.