RESUMEN
Single-port laparoscopy (SPL) has existed for several years. This meta-analysis was conducted to evaluate the efficacy of SPL compared with conventional laparoscopy (CL) in the treatment of benign gynecologic adnexal lesions. The purpose of this meta-analysis is to evaluate the superiority of SPL versus CL in the treatment of post-operative wound pain. The study looked for English-language publications from PubMed, Embase, Cochrane Library and the Web of Science until June 2023. The main result was the visual analogue scale (VAS) after 2, 4, 6, 8, 12, 24 and 48 h after operation. The paper contains 10 related papers by means of e-search. Of these, 4 were randomized controlled trials (RCTs), while 6 were non-RCTs. The results indicated that SPL and CL were significantly different after 2, 24 and 48 h after operation. SPL had lower post-operative pain after 2 h compared with CL (MD, -0.6; 95% CI, -0.98, -0.21; p = 0.002). After the operation, SPL also had a lower incidence of post-operative pain after 24 h compared with CL (MD, -0.59; 95% CI, -1.12, -0.06; p = 0.03). And the difference in pain was at 48 h after the most significant (MD, -0.49; 95% CI, -0.75, -0.23; p = 0.0002). But after 6, 8 and 12 h after operation, there was no significant difference in the degree of pain. Thus, SPL operations may result in a lower degree of pain than CL in both the post-operative and far post-operative phase.
RESUMEN
Herein, a coprecipitation method used to synthesize CuS nanostructures is reported. By varying the reaction time and temperature, the evolution of the CuS morphology between nanoparticles and nanoflakes was investigated. It was found that CuS easily crystallizes into sphere-/ellipsoid-like nanoparticles within a short reaction time (0.5 h) or at a high reaction temperature (120 °C), whereas CuS nanoflakes are readily formed at a low reaction temperature (20 °C) for a long time (12 h). Photodegradation experiments demonstrate that CuS nanoflakes exhibit a higher photodegradation performance than CuS nanoparticles for removing rhodamine B (RhB) from aqueous solution under simulated sunlight irradiation. Carbon nanotubes (CNTs) were further used to modify the photodegradation performance of a CuS photocatalyst. To achieve this aim, CNTs and CuS were integrated to form CNT/CuS hybrid composites via an in situ coprecipitation method. In the in situ constructed CNT/CuS composites, CuS is preferably formed as nanoparticles, but cannot be crystallized into nanoflakes. Compared to bare CuS, the CNT/CuS composites manifest an obviously enhanced photodegradation of RhB; notably, the 3% CNT/CuS composite with CNT content of 3% showed the highest photodegradation performance (η = 89.4% for 120 min reaction, kapp = 0.01782 min-1). To make a comparison, CuS nanoflakes and CNTs were mechanically mixed in absolute alcohol and then dried to obtain the 3% CNT/CuS-MD composite. It was observed that the 3% CNT/CuS-MD composite exhibited a slightly higher photodegradation performance (η = 92.4%, kapp = 0.0208 min-1) than the 3% CNT/CuS composite, which may be attributed to the fact that CuS maintains the morphology of nanoflakes in the 3% CNT/CuS-MD composite. The underlying enhanced photocatalytic mechanism of the CNT/CuS composites was systematically investigated and discussed.
RESUMEN
In this paper, a biodynamic model of human upper-body in the seated posture is developed. Based on d'Alembert's principle, the non-linear biodynamic equation of the modelling is derivated. Furthermore, the function of frequency and amplitude of modelling is obtained by employing the KB method in the non-linear theory. The response of realistic human parameters and the external stimulus on the modelling is simulated by MATLAB. The results show that the modelling presents a plenty of non-linear characteristics. The parameters identified and the stable areas to keep the stabilization of upper-body in the seated posture are discussed. These data can be used to explain and estimate the mechanism for the maintenance of stable trunk posture due to the mechanical shocks transmitted through the vehicle seat.