Congenital blood group chimerism refers to the coexistence of two or more distinct blood types within an individual, resulting from the presence of hematopoietic cell populations with different genotypes. Consequently, red blood cells in such individuals may express different blood group antigens. Based on the timing and mechanism of formation, blood group chimerism can be classified as either congenital or acquired. Although congenital blood group chimerism is rare and involves complex mechanisms, it holds significant implications in transfusion medicine, transplantation, and obstetrics. This article reviews the formation mechanisms, detection methods, and clinical significance of congenital blood group chimerism in transfusion medicine. Particular emphasis is placed on the principles, advantages, and limitations of various detection techniques. Furthermore, the potential applications of these technologies in clinical diagnosis are discussed, providing a technical foundation for the development of precise transfusion strategies.

Polycythemia vera (PV) is a BCR-ABL1-negative myeloproliferative neoplasm characterized by the proliferation of all three hematopoietic cell lines to varying degrees. It is commonly associated with mutations such as JAK2 V617F or mutations in exon 12 of the JAK2 gene. These genetic alterations contribute to a range of clinical manifestations, including thrombosis, bleeding tendencies, splenomegaly, and disturbances in microcirculation. Phlebotomy serves as a first-line therapeutic approach for PV by reducing hematocrit levels to a target below 45%, which effectively decreases blood viscosity and thereby lowers the risk of thrombosis. As such, phlebotomy plays a crucial role in the management of PV. This review systematically summarizes recent research advances on phlebotomy for PV, aiming to support the development of individualized treatment approaches for patients with PV.

Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.

Objective:To measure the morphological parameters of the fetal vertebral centrum ossification centers (COC) in the second-third trimester using MRI susceptibility weighted imaging (SWI), and to explore the growth and development trajectory of the vertebrae.Methods:Fetus in the second-third trimester with normal vertebrae development were prospectively and continuously included in Shandong Provincial Hospital Affiliated to Shandong First Medical University from December 2015 to December 2021, and the SWI scanning of fetal spine was performed. The following morphometric parameters of the C4, T6, L3, S1 vertebrae COC were measured, including sagittal diameter, transverse diameter, height, cross-sectional area and volume. The linear and nonlinear regression analysis was used to derive the best-fit curve for each parameters and gestational age.Results:A total of 112 fetuses were recruited with gestatonal age 21-39 (29.4±3.9) weeks, including 30 cases of C4, 58 cases of T6, 92 cases of L3, 62 cases of S1. Fetal spine in utero with global curvature was kyphosis, presenting two primary curves (thoracic and sacral kyphosis). The morphological parameters sagittal diameter, transverse diameter, height, cross-sectional area and volume of C4 followed the quadratic polynomial rule during 25 to 38 weeks (R 2=0.938, 0.943, 0.952, 0.957, 0.982). During 21 to 38 weeks, the sagittal diameter, transverse diameter and height of the T6 followed the exponential growth pattern (R 2=0.915, 0.923, 0.849) and the growth of the area and volume followed the quadratic polynomial growth pattern (R 2=0.943, 0.961). The L3 followed the quadratic polynomial rule during 21 to 39 weeks (R 2=0.910, 0.916, 0.914, 0.942, 0.948) The sagittal diameter, transverse diameter and height of the S1 followed the linear growth pattern (R 2=0.905, 0.911, 0.922) and the area and volume followed the quadratic polynomial growth pattern (R 2=0.930, 0.964) during 23 to 39 weeks. Conclusions:The growth and development of C4, T6, L3 and S1 COC of fetus in the second-third trimester has a good correlation with gestational age. The growth of fetal vertebral COC in the early stage is slow, but with the growth of gestational age, the growth rate of vertebral bodies accelerates.

Objective:To explore the effect of positive psychological group training in epilepsy patients.Methods:From January to December 2020, a total of 60 epilepsy patients in Department of Neurology in Shandong Daizhuang Hospital were selected as the research objects using the convenience sampling method, and were randomly divided into the observation group and the control group by random number table, with 30 cases each. The control group received routine nursing, and the observation group received positive psychological group training on the basis of the control group, lasting for 8 weeks. The scores of Self-Esteem Scale, the Feelings of Inadequacy Scale, Shame Scale and General Perceived Self-Efficacy Scale were compared between the two groups.Results:After intervention, the behavioral shame and body shame scores of the observation group were lower than those of the control group, and the differences were statistically significant ( P<0.01). After intervention, the scores of Self-Esteem Scale, the Feelings of Inadequacy Scale and General Perceived Self-Efficacy Scale of the observation group were higher than those of the control group, and the differences were statistically significant ( P<0.01) . Conclusions:Positive psychological group training can improve epilepsy patients' inferiority, self-esteem and self-efficacy, reduce sense of shame, which is worthy of clinical application.

Objective To observe and compare the resistance changes of ciprofloxacin (CIP), levofloxacin (LEV), norfloxacin (NOR) to Pseudomonas aeruginosa (PA), and choose the drug which had the best curative effect for PA from the drugs mentioned above.Methods Seven strain of non-repetitive PA which had sensitiveness to ciprofloxacin (CIP), levofloxacin (LEV), norfloxacin (NOR) and the same minimal inhibitory concentration (MIC) of the three drugs were co-cultured with CIP, LEV, NOR in concentrations of 0.5, 1.0, 2.0, and 4.0 times of MIC for evoked drug resistance, respectively.The MIC of CIP, LEV, and NOR to PA which evoked drug resistance by 3 kinds of concentration were detected by the methods of Epsilometer Test and Two-fold Agar Dilution.Results The MIC value of CIP to PA after evoking by 3 concentrations increased from 0.09 μg/ml before evoking to 0.25-16.00 μg/ml.The MIC after evoking was 3 to 178 times that before evoking.The MIC value of NOR to PA after evoking increased from 0.50 μg/ml before evoking to 2.00-64.00 μg/ml.The MIC after evoking was 4 to 128 times that before evoking.The MIC value of LEV to PA after evoking by 3 concentrations increased from 0.50 μg/ml before evoking to 2.00-32.00 μg/ml.The MIC after evoking was 2 to 64 times that before evoking.The differences of MIC of CIP to PA after evoking by different concentrations of CIP, NOR and LEV were not statistically significant (all P>0.05).The MIC value of NOR to PA after evoking by 4.0×MIC CIP was higher than that of evoking by 0.5×MIC CIP (P=0.006).The MIC value of NOR to PA after evoking by 4.0×MIC LEV was higher than that evoked by 1.0×MIC LEP (P=0.006).The MIC value of LEV to PA after evoking by 4.0×MIC CIP was higher than that of evoking by 0.5×MIC CIP (P=0.006).The MIC value of LEV to PA after evoking by 4.0×MIC NOR and LEV were higher than those evoked by 0.5×MIC NOR and LEV (all P=0.007).Conclusion PA can be evoked to develop resistance to different degrees after co-culturing with different concentrations of CIP, LEV, and NOR.The change of resistance of CIP to PA is the least among the three drugs mentioned above.It is suggested that CIP is still one of the best fluoroquinolones for the treatment of PA infection.

Objective To observe and compare the resistance changes of ciprofloxacin (CIP), levofloxacin (LEV), norfloxacin (NOR) to Pseudomonas aeruginosa (PA), and choose the drug which had the best curative effect for PA from the drugs mentioned above.Methods Seven strain of non-repetitive PA which had sensitiveness to ciprofloxacin (CIP), levofloxacin (LEV), norfloxacin (NOR) and the same minimal inhibitory concentration (MIC) of the three drugs were co-cultured with CIP, LEV, NOR in concentrations of 0.5, 1.0, 2.0, and 4.0 times of MIC for evoked drug resistance, respectively.The MIC of CIP, LEV, and NOR to PA which evoked drug resistance by 3 kinds of concentration were detected by the methods of Epsilometer Test and Two-fold Agar Dilution.Results The MIC value of CIP to PA after evoking by 3 concentrations increased from 0.09 μg/ml before evoking to 0.25-16.00 μg/ml.The MIC after evoking was 3 to 178 times that before evoking.The MIC value of NOR to PA after evoking increased from 0.50 μg/ml before evoking to 2.00-64.00 μg/ml.The MIC after evoking was 4 to 128 times that before evoking.The MIC value of LEV to PA after evoking by 3 concentrations increased from 0.50 μg/ml before evoking to 2.00-32.00 μg/ml.The MIC after evoking was 2 to 64 times that before evoking.The differences of MIC of CIP to PA after evoking by different concentrations of CIP, NOR and LEV were not statistically significant (all P>0.05).The MIC value of NOR to PA after evoking by 4.0×MIC CIP was higher than that of evoking by 0.5×MIC CIP (P=0.006).The MIC value of NOR to PA after evoking by 4.0×MIC LEV was higher than that evoked by 1.0×MIC LEP (P=0.006).The MIC value of LEV to PA after evoking by 4.0×MIC CIP was higher than that of evoking by 0.5×MIC CIP (P=0.006).The MIC value of LEV to PA after evoking by 4.0×MIC NOR and LEV were higher than those evoked by 0.5×MIC NOR and LEV (all P=0.007).Conclusion PA can be evoked to develop resistance to different degrees after co-culturing with different concentrations of CIP, LEV, and NOR.The change of resistance of CIP to PA is the least among the three drugs mentioned above.It is suggested that CIP is still one of the best fluoroquinolones for the treatment of PA infection.