Objective To investigate the application of repeated myocardial perfusion on difficult cardiac resuscitation after aortic unclamping under open heart operation. Methods Fifteen cases met difficult cardiac resuscitation after release of aortic cross-clamping under open heart operation were analyzed retrospectively. They were perfused with or without repeated aortic clamping, with warm blood cardioplegic solution until electric activity of cardiac muscle stop. Results All cases got cardiac resuscitation and detached from-cardiopulmonary bypass (CPB) successfully,9 cases perfused with warm blood cardioplegic solution without repeated aortic clamping got cardiac resuscitation automatically(7 cases) or after defibrillation for one time (2 cases),5 cases experiencing repeated aortic clamping and perfused with warm blood cardioplegic solution for two times got cardiac resuscitation automatically (3 cases) or after defibrillation for one time (2 cases) and another one experiencing for four times. Conclusion Application of repeated perfusion on difficult cardiac resuscitation after aortic unclamping under open heart operation is effective.

Objective To study the profiles and function of small RNA (sRNA)gene during chondrogenesis in rats so as to clarify the mechanisms of chondrocytes proliferation and differentiation.Methods All the sRNAs were identified from the female SD rats femoral head cartilages at three time points:at birth,ablactation and maturation,and three sRNA libraries were constructed.The Solexa sequencing and the bioinformatics analysis were employed to be blasted with the genomes of SD rats.Results The perfect match reads in the three libraries were screened out,which were correspondent to the 21 7 921 (41.23%),1 96 650 (38.74%)and 245 436 (41.54%)unique sRNA sequence,respectively.The percentages of 20-24 nt sRNA were 71.94% (d0),72.85% (d21),and 86.39%(d42).Half of clean sequences were 22 nt sRNA.The distribution characteristics of the reads were in line with the high-quality sRNA.More than 62% clean reads were from mature miRNA while the ratios in the three libraries were only 0.69%,0.78% and 0.63%.About 60% of the unique sRNA could not be matched with miRBase20.0 or Rfam9.1.Conclusion The distribution model of miRNA in the three libraries indicates that the miRNAs with different functions or from different sources are involved in the regulation of chondrocytes proliferation and differentiation in bone development and formation.

Objective To explore the apoptosis effect of docetaxel combined gamma knife on hepatoma cell SMMC-7721 subcutaneous xenograft in nude mice.Methods Subcutaneous xenogyaft models were constructed and were divided into two groups:control group and experimental group.The experimental group was treated with docetaxel 60ug/0.3ml once every 3 days for 6 times and gamma irradiation once every other day for 6 times (with indoor temperature of 137Cs radiation source irradiating the tumor and of fractionated schedule 5Gy with the total dose of 10Gy every time).The control group was treated with physiological saline with the same dose of 60 ug/0.3 mL.Tumor growth was observed.Tumor samples were cut 30 days after the treatment and TUNEL was used to detect the apoptosis of tumor cells.Results Tumor growth rate in experimental group significantly slowed down.Apoptotic index in experimental groups was significantly higher than that in control group (P ＜ 0.05) Cornclusion Docetaxel combined gamma knife can inhibit the growth of hepatocellular carcinoma in nude mice.

Aim To observe the effect of oxysophori-dine( OSR) on the EEG changes and its power spectrums of cerebral frontal cortex in anaesthetized rats. Methods With the equipment of brain stereotactic apparatus,electrode was implanted into frontal lobe of cerebral cortex in rats. Unipolar lead and computerized FFT technique were employed to record the index of EEG,power spectrum and frequency distributions to analyze the effect of OSR on the bioelectricity altera-tions of frontal lobe in cerebral cortexi in rats. Results Administrated( icv) with OSR at the dose of 2. 5,5, 10 mg/rat in rats,the EEG of frontal lobe of cerebral cortex was mainly featured by low amplitude and slow waves accompanied by spindle-formed sleeping waves with a significant decrease of total power of EEG( P

Objective To explore the effect of femtosecond laser-assisted in situ keratomileusis (FS-LASIK) and small incision lenticule extraction (SMILE) femtosecond laser in the treatment of myopic astigmatism with thin cornea. Methods From September 2022 to September 2023, 128 patients with thin cornea myopic astigmatism in the hospital were selected and randomly divided into FS-LASIK group (64 cases, 128 eyes, receiving FS-LASIK) and SMILE group (64 cases, 124 eyes, receiving SMILE). The visual acuity [uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA)] before surgery and at 1 year after surgery, refractive parameter spherical equivalent (SE) at 3, 6 and 12 months after surgery, corneal surface morphology [average corneal curvature (K_Ave), surface regularity index (SRI), surface asymmetry index (SAI)] before surgery and at 1 year after surgery, corneal biomechanic indicators[corneal expansion comprehensive deviation analysis index (BAD-D), corneal biomechanical index (CBI), total biomechanical index (TBI)] and corneal injury degree [corneal endothelial cell count, corneal endothelial cell size, coefficient of variation (CV)] and differences in postoperative astigmatism correction vector indicators [magnitude of error (ME), angle of error (AE), correction index (CI), and index of success (IOS)] were compared. Residual stromal bed thickness and the incidence of complications after surgery were recorded. Results One year after surgery, both UCVA and BCVA in both groups were improved compared with preoperation (P < 0.05), but there were no significant between-group differences (P>0.05). At 3, 6, and 12 months postoperatively, the SE levels in both groups were higher than preoperation (P < 0.05); however, there were no statistically significant differences in SE levels between the groups at above time points (P>0.05). One year after surgery, K_Ave, SRI, and SAI in both groups were lower than preoperative levels, and the SMILE group was lower than those in the FS-LASIK group (P < 0.05). One year after operation, BAD-D and TBI in both groups were higher than preoperative levels, while CBI was lower than preoperative levels; however, BAD-D and TBI in the SMILE group were lower than those in the FS-LASIK group, and CBI was higher than that in the FS-LASIK group (P < 0.05). One year after surgery, corneal endothelial cell counts in both groups were lower than preoperative levels, and CV of corneal endothelial cell size was higher than preoperative levels; however, corneal endothelial cell count in the SMILE group were higher than those in the FS-LASIK group, and the CV of corneal endothelial cell size was lower than that in the FS-LASIK group (P < 0.05). There were no statistically significant differences in ME, AE, CI, and IOS between the two groups (P>0.05). The residual stromal bed thickness was (302.01±55.03) μm in the FS-LASIK group and (310.23±46.03) μm in the SMILE group after surgery, with no statistically significant between-group difference (t=1.284, P=0.200). One year after surgery, there were 5 cases of dry eye in the FS-LASIK group and 2 cases in the SMILE group, with no statistically significant difference in incidence of dry eye between the two groups (χ²=1.227, P=0.268). Conclusion For patients with myopic astigmatism with thin cornea, both FS-LASIK and SMILE can achieve satisfactory improvement in visual acuity and refractive state, and the latter one has a relatively small impact on the integrity of corneal structure, biomechanical stability and surgical injury.

OBJECTIVETo observe the effect of oxysophoridine (OSR) on the EEG and its power spectrum of reticulum formation in mesencephalon of anaesthetized rat.

METHODUtilizing the technique of brain stereotactic apparatus, electrodes were implanted into reticulum formation of mesencephalon. Monopolar lead and computerized FFT technique were employed to record and analyse the index of EEG, power spectrum and frequency distribution in order to study the effect of oxysophoridine on the bioelectricity change of mesencephalon reticulum formation in rats.

RESULTAfter administrating(icy) with oxysophoridine at the dose of 2.5,5, 10 mg/rat, the EEG of mesencephalon reticulum formation mainly characterized with low amplitude and slow waves accompanied by spindle-formed sleeping waves with a significant decrease of total power of EEG (P < 0.05) while the ratio of theta, alpha waves increased in total frequency of rats (P < 0.05).

CONCLUSIONOxysophoridine possesses central inhibitory effects and its inhibitory mechanism may associate with the reduction of bioelectricity in mesencephalon reticulum formation. Mesencephalon reticulum formation may serve as one part of the structure serving as the circuit conducting the central inhibitory effect of oxysophoridine. [Key words] oxysophoridine; reticulum formation; electroencephalogram (EEG) ; rats

Alkaloids ; administration & dosage ; Animals ; Electroencephalography ; Male ; Mesencephalon ; drug effects ; physiology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reticular Formation ; drug effects ; physiology

Medical Artificial Intelligence (AI) makes the traditional doctor-patient relationship present a new pattern, but also highlights many ethical problems: inability to protect the rights and interests of patients, weakening the main responsibility of medical personnel, weakening the practical ability of medical personnel, and challenging the main status of medical personnel, etc.. It is necessary to improve relevant laws, regulations and regulatory system, adhere to the main status of medical personnel, improve the public awareness and acceptance of medical AI, and strengthen the construction of ethical system of AI, so as to deal with the ethical anomie caused by intelligent medical treatment and promote the harmonious development of doctor-patient relationship. It is expected that through the combination of AI and professional ethics principles, AI will be brought into daily clinical practice responsibly, to provide patients with better medical services.

BACKGROUND:In recent years,it has been found that some traditional Chinese medicine monomers can alleviate oxidative stress and apoptosis of the skin flap,promote vascular regeneration of the skin flap and prevent skin flap necrosis by activating autophagy. OBJECTIVE:To review the research progress of traditional Chinese medicine monomer regulating autophagy in preventing flap necrosis. METHODS:The Chinese and English key words were"traditional Chinese medicine(TCM),autophagy,skin flaps".The first author searched the relevant articles published in CNKI and PubMed databases from January 2010 to October 2022.A total of 196 articles were retrieved in the preliminary screening and then screened according to the inclusion and exclusion criteria.The quality assessment was conducted by reading the literature titles and abstracts.Finally,55 articles were summarized. RESULTS AND CONCLUSION:(1)The regulation of autophagy is mediated by AMPK/mTOR,PI3K/AKT and other signaling pathways.Activation of autophagy can alleviate the oxidative stress and apoptosis of the flap,promote the regeneration of blood vessels in the flap,and prevent flap necrosis.(2)Terpenoids(Betulinic acid,Andrographolide,Notoginseng Triterpenes,Catalpa),phenolic compounds(Resveratrol,Curcumin,Gastrodin),phenolic acids(Salvianolic acid B)and steroid compounds(Pseudoginsenoside F11)in traditional Chinese medicine monomers can alleviate oxidative stress and apoptosis of skin flap by regulating related signaling pathways to activate autophagy,promote skin flap angiogenesis and promote skin flap survival.(3)Studying the research progress of traditional Chinese medicine monomer to prevent flap necrosis by regulating autophagy can provide a reference and theoretical basis for traditional Chinese medicine to prevent flap necrosis and promote flap healing in the clinic.