Search

Abstract Aims Splenectomy combined with pericardial devascularization is one of the important methods to treat hypersplenism, gastrointestinal bleeding, and other complications caused by liver cirrhosis; however, it is accompanied by a high risk of portal vein thrombosis (PVT). This study aimed to explore the preventive and therapeutic effects of proximal splenic vein ligation (PSVL) with postoperative transcatheter anticoagulant therapy (TCAT) on PVT. Methods This study retrospectively selected 143 patients with liver cirrhosis and portal hypertension, who received splenectomy combined with pericardial devascularization from June 30, 2018 to June 30, 2021. According to computed tomography photography, within 1 week before the operation, the patients were divided into a prevention group (without preoperative PVT, n = 112) and a treatment group (preoperative PVT, n = 31). Then, each group was subdivided based on the treatment and prevention measures into PSVL + TCAT (n = 70) and systemic anticoagulant therapy (SAT) subgroups (n = 73). The preventive and therapeutic effects of PSVL followed by TCAT on PVT were analyzed. Results The operation time in the PSVL + TCAT subgroups was longer than that in the SAT subgroups (185 ± 76 min vs. 161 ± 55 min; p 0.50). There was no operative death, and all patients recovered uneventfully. In the prevention group, procedure‐related complications occurred in two patients in the PSVL + TCAT subgroup (3.7% [2/54]), including one patient with slight pancreatitis and one patient with chylous leakage, owing to mobilization of the pancreas. The PVT incidence in the prevention group was significantly different between the two subgroups at postoperative 7th day, 3rd month, and 6th month (PSVL + TCAT: 0%, 11.1%, and 5.6% vs. SAT: 39.7%, 31.0%, and 20.7%, respectively; all p

At present, in order to overcome electromagnetic interference and prevent electromagnetic harm, the research of new and efficient electromagnetic wave absorbing materials has become the research focus in the field of materials science. The one-dimensional structure can promote the impedance matching and attenuation characteristics of the absorbing materials. Electrospinning, as an effective method to prepare nanofibers with high length-diameter ratio, has been widely concerned because it is suitable for structural design of various materials. In this paper, the research progress and absorption properties of nano-fiber materials prepared by electrospinning combined with different processes are introduced. [ABSTRACT FROM AUTHOR]

In this paper, we proposed a mathematical analysis model of the enterprise innovation system according to the theory of synergetics and based on a three-variable chemical oscillation model. The three variables-innovation capability status, resource investment status and innovation support status-are used metaphorically as the main reaction variables in the oscillation reaction. Through the simulation, in which the fourth-order Runge-Kutta algorithm was utilized and realized by the software MATLAB, the co-evolutionary characteristics of enterprise innovation systems were studied. We conclude that the degree of protection of intellectual property rights has a critical impact on the enterprise innovation system: overly strong or weak intellectual property protection is not conducive to enterprise innovation. Only when intellectual property protection is within a reasonable range can it promote the evolution of the enterprise innovation system to the collaborative state.