ObjectiveTo investigate the variation regularity about volume of drainage after initial thyroidectomy, and to find out the time points of safety extubation and the time points of risk extubation. MethodsBetween September 2013 and April 2014, the clinical date of 71 cases of thyroid tumor who underwent thyroidectomy were prospectively analyzed and completely random designed. The patients were indwelling drain after thyroidectomy, the volume of drainage liquid were registered at each point of time in period of 48 hours after operation and analyzed its the variation regularity. ResultsThe volume of drainage fluid in 48 h after operation was gradually decreased in 71 patients. The reduce speed of volume of drainage fluid in the 12 h after operation was faster, then was significantly slower, and gradually stabilized. The amount of the drainage fluid reached the peak in 2 h after operation in 22 cases, and then gradually decreased and reached the stabilization. ConclusionsThe 2 hours after thyroidectomy is the risk drainage removing time when is relatively safe. The 12 hours after thyroidectomy is the safety drainage removing time, after that there is no longer any meaning to keep drainage tube.
The lumbar intervertebral disc exhibits a complex physiological structure with interactions between various segments, and its components are extremely complex. The material properties of different components in the lumbar intervertebral disc, especially the water content (undergoing dynamic change as influenced by age, degeneration, mechanical loading, and proteoglycan content) - critically determine its mechanical properties. When the lumbar intervertebral disc is under continuous pressure, water seeps out, and after the pressure is removed, water re-infiltrates. This dynamic fluid exchange process directly affects the mechanical properties of the lumbar intervertebral disc, while previous isotropic modeling methods have been unable to accurately reflect such solid-liquid phase behaviors. To explore the load-bearing mechanism of the lumbar intervertebral disc and establish a more realistic mechanical model of the lumbar intervertebral disc, this study developed a solid-liquid biphasic, fiber-reinforced finite element model. This model was used to simulate the four movements of the human lumbar spine in daily life, namely flexion, extension, axial rotation, and lateral bending. The fluid pressure, effective solid stress, and liquid pressure-bearing ratio of the annulus fibrosus and nucleus pulposus of different lumbar intervertebral discs were compared and analyzed under the movements. Under all the movements, the fluid pressure distribution was closer to the nucleus pulposus, while the effective solid stress distribution was more concentrated in the outer annulus fibrosus. In terms of fluid pressure, the maximum fluid pressure of the lumbar intervertebral disc during lateral bending was 1.95 MPa, significantly higher than the maximum fluid pressure under other movements. Meanwhile, the maximum effective solid stress of the lumbar intervertebral disc during flexion was 2.43 MPa, markedly higher than the maximum effective solid stress under other movements. Overall, the liquid pressure-bearing ratio under axial rotation was smaller than that under other movements. Based on the solid-liquid biphasic modeling method, this study more accurately revealed the dominant role of the liquid phase in the daily load-bearing process of the lumbar intervertebral disc and the solid-phase mechanical mechanism of the annulus fibrosus load-bearing, and more effectively predicted the solid-liquid phase co-load-bearing mechanism of the lumbar intervertebral disc in daily life.
PURPOSE:To investigale the influence of orally administered aldose reduetace inhibitor(ARI) and myo-inositol (MI)for contents of gluecose,sorbitol and myo-inositol in experimental diabetic retinal tissue in rat. METHODS :The STZ-induced diabetic rats were administered ARI or MI by oral. The glucose sorbitol and myo-inositol in retinal tissues were analysed by high performance liquid chromatography after experimental period of 6 montbs. RESULTS:It was found that the contents of glucose and sorhitol were increased and myo inosltol was decreased in diabetic group. In diabetes with ARI group.the content of sorbitol was increased although the glucose was in high level. In diabetes wilb MI group,the sorbitol accumulaled and coment of myo-inositol was close to the normal control group. CONCLUSIONS:The ARI can effectively obstruct sorbitol accumulation in retina. MI increase myo-inositol level but fail to reduce sorbitol contenl of retina. （Chin J Ocul Fundus Dis,1997,13: 75-77 ）
Compound Huangbai liquid coating agent is a preparation that combines multiple traditional Chinese medicinal herbs and has shown significant efficacy in burn treatment. In recent years, the application of this coating agent in burn treatment has received widespread attention, and it plays a role in promoting wound healing, preventing infection, and reducing patient pain. This article reviews the research progress of compound Huangbai liquid coating agent in burn treatment, explores its mechanism of promoting wound healing, evaluates its current advantages and limitations in burn treatment, and provides scientific basis and theoretical support for its better use in burn treatment.
ObjectiveTo study the effects of different penetration enhancers on the transdermal penetration of Miao medicine named Diploclisia affinis. MethodsImproved Franz diffusion cell was adopted as the apparatus for in vitro mouse' skin permeation. The kinetic parameters of percutaneous absorption, such as penetration rate, enhancing rate (ER), and lag time (Tlag) were determined by high performance liquid chromatography. Azone, oleic acid (OA) and borneol were investigated for percutaneous absorption effects. ResultsThe penetration rates of the medicine with 3% azone, OA and borneol added were respectively (214.1872±13.5690), (227.5544±9.8490), and (168.1187±21.5640) μg/(cm2·h), and the ER was 1.61, 1.71, and 1.26 compared with the penetration rate of that with nothing added. The Tlag was 2.1081, 1.8256, and 2.9655 hours. ConclusionAll the penetration enhancers can increase significantly the absorption of Miao medicine named Diploclisia affinis, especially 3% OA is the best, but 3% borneol may make the Tlag longer.
Lung cancer has the highest incidence and mortality rates among malignant tumors both in China and worldwide, with approximately 85% of cases being non-small cell lung cancer (NSCLC). In the diagnosis and treatment of lung cancer, conventional imaging and tissue biopsy are often limited by insufficient sensitivity or invasive risks, making it difficult to meet the demands of future precision medicine. In recent years, artificial intelligence (AI)-based radiomics and autoantibody-based liquid biopsy have developed rapidly and have become major research focuses. AI radiomics significantly improves the accuracy of traditional imaging diagnosis by autonomously learning from large-scale imaging databases. Autoantibody liquid biopsy, on the other hand, utilizes tumor-associated autoantigens and antibodies as biomarkers, offering the advantages of being non-invasive, precise, efficient, and capable of reflecting spatiotemporal tumor heterogeneity, thereby demonstrating great potential in NSCLC diagnosis and treatment. This review summarizes recent research advances in autoantibody liquid biopsy and AI radiomics for the management of lung cancer.
The important detection indicators of liquid biopsy in cancer patients include circulating tumor cells and circulating tumor DNA. The former refers to the cells that fall off from the primary tumor and metastatic sites and enter the blood circulation through blood vessels or lymphatic vessels, while the latter refers to the cell-free DNA released into the blood vessels by apoptotic or necrotic tumor cells. For breast cancer patients receiving neoadjuvant therapy, dynamic monitoring of circulating tumor cells and circulating tumor DNA can help early identify the responsiveness of tumor patients to different treatments and guide subsequent treatments to improve prognosis. This article reviews the research progress and clinical significance of detecting circulating tumor cells and circulating tumor DNA in breast cancer patients receiving neoadjuvant therapy, aiming to provide a reference for the more rational application of circulating tumor cells and circulating tumor DNA in neoadjuvant therapy of breast cancer.
ObjectiveTo establish an accurate and sensitive high performance liquid chromatography-mass spectrometric (HPLC/MS/MS) method for determination of vorinostat (SHA) and M2 metabolites in human serum, which was applicable for pharmacokinetic study of SHA. MethodsThe essay was conducted with an API 3000 HPLC-MS/MS system consisted of a Gemini C18 column (50 mm×3 mm, 3 μm), and the mobile phase consisted of methanol-acetonitrile-water-1 mol/L NH3-formic acid (25:15:60:0.1:0.05) at a flow rate of 0.23 mL/min. Acidulated serum samples were extracted by 3.5 mL diethyl ether which contains 3% isopropyl alcohol and was operated under the multiple reaction monitoring mode using the electrospray ionization technique. d5-SHA was used as the internal standard. ResultsThe retention time of SHA, M2 metabolite and internal standard were 4.1, 3.1 and 4.0 minutes, respectively. The linear range of SHA and M2 metabolite were in the range of 1-1 000 and 2-2 000 ng/mL, and the limit of quantity were 1.0 and 2.0 ng/mL; the method recovery were 93.0%-99.3% and 88.11%-104.12%, respectively. Matrixes effect of SHA and M2 metabolite were blow 9.0%. ConclusionThis method for the quantitative determination of SHA and M2 in human serum was proved to be simple, rapid, sensitive and accurate; it can be applied in the determination of SHA and M2 metabolite.
Objective To study the distribution and concentration of meropenem in rabbit bile. Methods The rabbits were cannulated with a silicone tube in the common bile duct and the blank bile was collected. The rabbits were then administered intravenously with meropenem. Multiple bile samples (1.5 ml) were collected at different phases after the administrations. According to requirement of the high performance liquid chromatography (HPLC), the specificity test was undertook. The blank bile was then mixed with meropenem and mobile phase, respectively, in order to obtain a series of bile samples at different concentrations ranging from 0.5 to 500 μg/ml. The samples were analyzed with HPLC and the chromatographic peak area of meropenem contents were quantitated through external reference method. The linear regression equation was used to analyzed the relationship between the drug concentrations and the chromatographic peak areas. The bile samples that were collected after drug administrations were pretreated and the chromatographic peak areas were assayed by the liquid chromatograph. The bile concentrations were then calculated according to the regression equation, and the concentration-time distribution of meropenem in the bile was obtained ultimately. Results The specificity test indicated the bile dopant peak and the meropenem chromatographic peak were well-separated under chromatographic condition of the mobile phase. The standard curve regression equation was S=2 209.10C-1 251.34, r=0.999 9, and minimum quantitation limit of meropenem was 0.5 μg/ml. After a single i.v. administration of 75 mg/kg of meropenem in each rabbit, drug concentrations reached (38.36±14.17) μg/ml immediately in bile， which significantly exceeded the minimum inhibitory concentrations (MIC90) for most gram negatives, which range from 0.031 to 2 μg/ml. The bile concentration of meropenem decreased quickly over time, and meropenem was eliminated completely in rabbit bile 3 hours after intravenous injection. Conclusion Meropenem could achieve adequate bile concentration for the treatment of biliary tract infection due to susceptible bacteria. However, because of its rapid biliary elimination, meropenem should be used in shorter interval time.
In conventional open breast surgery, the surgical trauma is significant and the postoperative scar is often noticeable. Endoscopic and robot-assisted breast surgery is increasingly attracting attention due to the advantages such as smaller incisions, lower complication rate, and improved aesthetic outcomes. However, the lack of natural cavities in the breast has become a primary challenge in establishing and maintaining the necessary surgical space for endoscopic breast surgery. We reviewed the research progress of endoscopic and robot-assisted breast surgery, summarized the the innovations and challenges of existing techniques, and focused on introducing the application value of physical and biological properties of gas and liquid in endoscopic breast surgery.