Objective: To explore the relationship between left coronary plaque character with the bifurcation angle and diameter by 256-slice CT angiography (CTA). Methods: A total of 387 consecutive patients who received CTA in our hospital were retrospectively studied. There were 102 patients with normal image including 60 male and 42 female at the mean age of (52.10 ± 9.65) years and 285 patients with left coronary plaque including 166 male and 119 female at the mean age of (55.65 ± 10.40) years. All patients were divided into 4 groups according to the plaque condition, Normal group,n=102 patients without plaque, Non-calciifcation group,n=137, Calciifcation group,n=79 and Mixed group,n=69. The patients with non-calciifcation plaque included 73 of mild stenosis and 57 of moderate to severe stenosis in proximal LDA. Left coronary bifurcation angle, proximal diameter and area were measured by multi-planar reconstruction (MPR) and the maximum density projection (MIP) techniques to analyze the relationship between the above indexes and plaque position, character, degree of local stenosis. Results: Left coronary bifurcation angle, the proximal diameter, area in LDA and LCX in 3 plaque groups were all larger than those in Normal group,P<0.05. In Non-calciifcation group, the above indexes were similar between the patients with mild stenosis and moderate to severe stenosis,P>0.05, while in patients with moderate to severe stenosis, the bifurcation angle and diameter were larger in male than those in female patients,P<0.05. Conclusion: 256-slice CTA could objectively evaluate left coronary bifurcation angle, stenosis degree and plaque character, which are valuable for coronary artery disease prevention, diagnosis and treatment in clinical practice.

Objective To study the influence of serum containing Fuzheng Toudu Qudu Recipe, a Chinese formula with the actions of supporting healthy qi to expel and remove toxicity, on serum levels of interleukin 2 (IL-2) and soluble interleukin 2 receptor (sIL-2R) at different stages of CD34+derived dendritic cells (DC) of patients with minimal residual disease of myelogenous leukemia ( MRD-L) , and to explore the biological mechanism of Fuzheng Toudu Qudu Recipe in promoting CD34+ to transform into DC in MRD-L patients. Methods Bone marrow mononuclear cells ( BMMC) were separated from the bone marrow of acute myeloid leukemia patients at complete remission stage by using Ficoll centrifugation. CD34+ cells were isolated by using immuno-magnetic mircobeads method, and then were cultured with various concentrations of Chinese medicine medicated serum and cytokines in vitro for the induction of DC. The morphologic characteristics of DC were observed with the inverted phase contrast microscope, and the expression levels of DC surface molecules such as CD83, CD80, CD86, CD1a and HLA-DR were detected by using flow cytometry. On culturing day 0, 6 and 9, serum levels of IL-2 and sIL-2R of each group were measured by enzyme-linked immunosorbent assay ( ELISA). Results ( 1) Chinese medicine medicated serum combined with cytokines was effective on promoting CD34+ to differentiate into DC with typical morphology, and inducing DC to have high expression of CD80, CD83, CD86 and HLA-DR, which differed from those in fetal calf serum (FCS) group and blank rabbit serum group (P<0.01). Middle- and low-dose combination groups increased expression of CD1a, which differed from high-dose combination group and cytokines group ( P<0.01). ( 2) Content of IL-2 in combination groups was higher than that in blank rabbit serum group on culturing day 0. In the combination groups, IL-2 was higher on culturing day 6 and 9 than that on culturing day 0. Middle and high-dose combination groups had higher IL-2 content on culturing day 9 than on culturing day 6 ( P<0.05 or P<0.01). At the same time point, combination groups had higher IL-2 content than the blank rabbit serum group (P<0.05 or P<0.01). (3) Content of sIL-2R in the combination groups was lower than that in blank rabbit serum group on culturing day 0. In the combination groups, sIL-2R was lower on culturing day 9 than that on culturing day 0 and 6 ( P<0.01) . High-dose combination group had lower sIL-2R content on culturing day 6 than that on culturing day 0 (P<0.05), and the difference of sIL-2R in other groups was insignicant between on culturing day 6 and on culturing day 0 ( P>0.05) . At the same time point, combination groups had lower IL-2 content than the blank rabbit serum group (P<0.05 or P<0.01). Conclusion Fuzheng Toudu Qudu Recipe is effective on increasing serum content of IL-2 and reducing sIL-2R content, and the changes of cytokine contents are more obvious along with the maturity of DC, which indicates that the recipe plays positive effect in the process of promoting CD34+cells to differentiate into DC.

Objective To investigate the effect of laser engraving personalized nasal patch applied to patients with nasal catheter indentation.Methods A total of 124 patients who underwent esophageal cancer surgery in the First Hospital of Lanzhou University from February 2022 to February 2023 and required indwelling nasal catheter were selected as study objects,and were divided into experimental group and control group according to random number table method,with 62 cases in each group.The control group used conventionally cut nasal patches to fix the nasal catheters,and the experimental group used laser engraved personalized nasal patches.Catheter displacement or slippage under the fixation device,nasal patch rolled edges and number of replacement,nasal medical device-related pressure injury,medical adhesive-related skin lesions and patients'comfort were observed in two groups.Results The rate of catheter displacement,number of rolled edges of nasal patches and numbers of replacement in experimental group were significantly lower than those in control group(P<0.05).The incidence of nasal mucosal indentation,nasal pain,nasal pressure injury and medical adhesive related skin lesions in experimental group were significantly lower than those in control group(P<0.05).The comfort of patients at the physiological level of experimental group was significantly better than that of control group(P<0.05).Conclusion Laser engraved personalized nasal patches can reduce the frequency of clinical nasal catheter displacement,nasal patch rolled edges and number of replacement,reduce the occurrence of nasal medical device related pressure injuries and medical adhesive-related skin lesions,and increase patients'comfort.

Autoimmune hepatitis （AIH） is a type of chronic hepatitis caused by the attack of hepatocytes by the autoimmune system， and with the prolongation of disease course， it may gradually progress to liver cirrhosis and even hepatocellular carcinoma. Although great achievements have been made in the understanding and treatment of AIH， its etiology and pathogenesis still remain unclear. T cells play a crucial role in the development and progression of AIH， and by focusing on follicular helper T cells， this article elaborates on the research advances in follicular helper T cells in AIH， in order to provide new ideas and strategies for the clinical treatment of AIH.