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212 results on '"Tang, Shibin"'

18. Application of hydrodissection to expose recurrent laryngeal nerve during thyroid surgery

Author

Ye Jian, Feng Jianping, Tan Jianhui, Huang Yongsheng, Pan Xiaomei, Tang Shibin

Subjects
thyroid surgery, exposure of recurrent laryngeal nerve, injury of recurrent laryngeal nerve, hydrodissection, Medicine
Abstract

Objective To investigate the application value of hydrodissection to expose the recurrent laryngeal nerve in thyroid surgery. Methods Seventy patients undergoing thyroid surgery were randomly divided into the hydrodissection group （n = 35） and control group （n = 35）. In the hydrodissection group， the recurrent laryngeal nerve was exposed by local injection of normal saline. And in the control group， the recurrent laryngeal nerve was exposed by blunt dissection. The operation time， blood loss， length of hospital stay， exposure time of recurrent laryngeal nerve， incidence rates of recurrent laryngeal nerve injury and hypocalcemia were compared between two groups. Results 46 recurrent laryngeal nerves were exposed in the hydrodissection group and 54 in the control group. Surgeons found that hydrodissection could more explicitly display the course of recurrent laryngeal nerve. One case of temporary recurrent laryngeal nerve injury occurred in the hydrodissection group and five cases in the control group， and the difference was not statistically significant （P > 0.05）. No permanent recurrent laryngeal nerve injury was observed in both groups. The exposure time of recurrent laryngeal nerve， operation time， blood loss， incidence rate of hypocalcemia and length of hospital stay did not significantly differ between two groups， and the differences were not statistically significant （all P > 0.05）. Conclusion It is convenient and simple to expose the recurrent laryngeal nerve through hydrodissection. As a safe and reliable Method to expose the recurrent laryngeal nerve， hydrodissection can accurately identify the course of the recurrent laryngeal nerve and avoid mechanical injury induced by excessive dissection of the nerve.

Published
2023
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41. Boundary-effect and scale-heating rate equivalence effect of cracking behavior in the rock models subjected to heating from the central borehole

Author

Huang, Xin, Tang, ShiBin, and Tang, ChunAn

Abstract

Thermal cracking is broadly observed in rock engineering. A finite element numerical model which considers the heterogeneity of rock materials and the damage evolution process was used to simulate the thermal cracking behavior of square rock samples heated from the central borehole. The thermal and mechanical behaviors of two cases, i.e., the case with large size but low heating rate and the case with small size but high heating rate were compared to study the crack initiation location in the models with different model sizes and heating rates. The simulated stress and temperature fields, as well as the failure pattern, were in good agreement with the experimental observations. The temperature and thermal stress distribution during the heating process in both cases indicated that high tensile stress was concentrated around the thermal gradient front, which resulted in the cracks initiating at the location with a certain distance away from the borehole. The results show that under the same heating rate, crack initiation location moves outwards with the increment of the model size then remains approximately at one location, which reflects the boundary-effect. Furthermore, the results indicate that the relative crack initiation locations in two cases are nearly the same if the ratio between the heating rate in two cases (Ṫx/Ṫy) nearly equal to the square of the inverse ratio of corresponding model side lengths ((ay/ax)2). This concept is named the scale-heating rate equivalence effect in this study. It is beneficial for studying thermal cracking of rock both numerically and experimentally since the model size can be significantly decreased.

Published
2024
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