The present study referred to the incorporation of 35S-sulfate into the chicken embryo cartilage stimulated by the serum from rats fed on the grain of the endemic areas of Kashin-Beck disease (KBD) and children with KBD using the cpm /mg cartilage as the indicator of serum sulfation factor (SF) activity. The SF activity in serum from KBD model rats was markedly reduced (161.5+66.8 n= 22), when compared with the controls (212.2+58.9,n = 22). The serum SF activity in KBD children (300.5+90.9,n = 22) was much lower than that in healthy controls (425.0 + 142.5, n = 22). The results suggest that in the endemic grains and/or environment there exists certain factors which interfere with the normal function of serum SF, the change of serum SF activity may be the key-point in the pathogenesis of KBD.

BACKGROUND: Skin transplantation is the most effective conventional method to cure large area full-thickness skin damage caused by empyrosis or some diseases, but present deficiency of skin donator is the largest barrier in front. The most ideal way to solve this problem is to use tissue-engineering skin reconstructed by self-skin cells as seed cells.OBJECTIVE: To investigate the effects of tissue engineered artificial animal skin in animal grafting experiment.DESIGN: A randomized controlled trial SETTING: Institute of frontier medical sciences and department of dermatology in a university.MATERIALS: Study was performed in the Cell-Engineering Institute of Jilin University from September 1998 to July 2001. Totally 20 newborn Wistar rats and 24 8-week old male nude mice were selected into our study.METHODS: Full-thickness wounds(diameter: 20 nn) were made on the backs of twenty-four nude mice to establish full-thickness skin defect animal model for grafting by the tissue-engineered reconstructive artificial skin made by chitosan(CH) as stromal scaffold. Twenty-four 8-week old nude mice were divided into artificial skin (AS) group, chitosan membrane(CH) group and control group (CG). All wounds were covered with AS, CH or petrolatun gauze correspondingly. The wounds of each groups were observed daily,techniques like histology and infrared-ray scan were used for a dynamical surveillance on the 3rd, 7th, 14th and 21st days.MAIN OUTCOME MEASURES: ① general observation; ② blood supply in recipient area under infrared-ray observation; ③ histological observation.RESULTS: Transplanted AS had a favorable fusion between tissue-engineered skin and self-skin on the 3rd day after grafting with a few of ingrowths of capillaries. The color of the AS was closed to self-skin. The capillaries gradually increased in the grafts over time. The new epidermis was clearly consisted of stratum basale, stratum spinosum, stratum granulosum, and stratum corneum. Keratinization enhanced with exfoliation. Cells in dermis increased and the scaffold gradually degraded. The secreted extracellular matrix increased as well. On the 14th day after grafting, the wounds almost recovered.The color of the grafted artificial skin was more similar to the nature skin with very little scaring, which indicated that a second grafting was unnecessary. The scabs did not completely fall off in CH group until the 14th day, and the wound was not healed. The color was darker than that of AS group. The scabs fell off in CG, and the wounds were big and deep with dark red color.CONCLUSION: The new reconstructive tissue-engineered artificial skin with CH as stromal scaffold has good histocompatibility, which can be applied in grafting for full-thickness wounds.

Objective This study aims to analyze midterm survival and to assess the midterm mortality following acute kidney failure (AKF) of patients undergoing surgical treatment of acute type A aortic dissection.Methods Clinical data of the patients who underwent Sun's procedure from February 2009 to March 2015 were collected.Patients with preoperative dialysis were excluded.Data including preoperative cardiovascular diseases,serum creatinine leve1 and CPB time were gathered.The patients were divided into the group of AKF and the group of non-AKF accounting to require dialysis.The group of AKF was follow-up by phone.Midterm mortality was studied with Cox analysis and midterm survival was estimated by Kaplan-Meier analysis.Results 524 patients underwent aortic surgeries which AKF was occurred in 51 (51/524,9.7％) patients.Hospital mortality was 23.5％ (12/51) in AKF group which seven death were strokes,three death were lower-extremity ischemia and two death were low cardio output.There were 2 patients dead with multi organ failure and paraplegia in first year.One reoperation patient because of anastomotic fistula was dead in fifth year.Only diabetes was independently associated with midterm mortality.Midterm survival for patients with AKF was 56％ during a median follow-up of 30.5 months.Survival was equal between the subgroups of Cr ＞ 200 mol/L and Cr ＜ 200 mol/L(P =0.741).Conclusion AKF after acute aortic dissection was a severe complication and the incidence was 9.7％.In patients with AKF,diabetes was associated with increased mortality across follow-up.Five years survival was 56％ not effected by preoperative Cr.

Objective To evaluate the impact of cerebrospinal fluid drain(CSFD) on the incidence of acute spinal cord injury(SCI) following extensive TAAA repair.Methods From February 2009 to July 2016,153 patients underwent extensive TAAA repairs with a consistent strategy of normal thermia,non-circulatory bypass,sequential aortic cross clamping,aortic-lilac bypass,and intercostal artery reconstruction.The repairs were performed with preoperative CSFD (n =78) or without CSFD (n =75).In the former group,CSFD was inserted after the patient has been anaesthetized and continued for 72 hours after surgery.The target CSF pressure was 10 mmHg or less.Results The mean age of patients was (38 ± 10) years and 108 (70.6％) were male.There were 87 (53.8％) patients with previous aortic surgeries and 33 (22％) with Marfan syndrome.The two groups had similar risk factors for paraplegia.Aortic clamp time,operation time and number of reattached intercostal arteries were similar in both groups.In-hospital mortality rates were 1.3％ (one patient) and 6.7％ (five patients) for CSFD and the group without CSFD,respectively (P =0.086).Ten patients (13.3 ％) in the group without CSFD had paraplegia develop.In contrast,only two patients in the CSFD group(2.6％) had postoperative paraplegia(P =0.013).Stepwise logistic regression analysis identified CSFD had spinal cord protection,P =0.026;OR =0.171;95％ CI:0.036-0.809).No patients occurred CSF catheter related complications.Conclusion This randomized clinical trial showed that preoperative CSFD placement could be an effective strategy in preventing SCI following extensive aortic aneurysm repair.Care should be taken to prevent complications related to overdrainage.

Objective To analyze the independent risk factors associated with acute kidney injury(AKI)after Sun’s pro-cedure in the patients with acute aortic dissection .Methods Clinical data of 400 patients who underwent Sun ’ s procedure from February 2009 to August 2013 were collected.Data included preoperative GFR, Cleveland values, CPB time and fluid balance of 24 h intra and after operation were gathered .The patients were divided into the group of AKI and the group of non-AKI accounting to the changing of serum creatinine.Results AKI was occurred in 150(37.5%) patients.Hospital mortality in AKI group was significant higher than that in the non-AKI group(11.3% vs.2.4%, P<0.05).Univariable analysis re-vealed male, BWI, hypertension, preoperative MAP,WBC, eGFR, Cleveland value, cardiopulmonary bypass time, intra and postoperative fluid balance for 24 h have significant difference between 2 groups.Multivariate logistic regression analysis showed hypertension, Cleveland value, cardiopulmonary bypass time and fluid balance were independent risk factors for AKI .Conclu-sion AKI after acute aortic dissection was a severe complication .Hypertension, Cleveland value, cardiopulmonary time and fluid balance were associated with AKI.

Objective To investigate the effect of lung recruitment maneuver on alveolar collapse after fiber support bronchoscopy,and to evaluate its clinical value.Methods Since April 2014 and April 2017 in underwent deep hypothermia and stop of 60 cases of hypoxemia in patients with postoperative aortic circulation as the research object,according to the random number distribution method.The average score of the two groups,each group with 30 cases in each.The control group was treated with conventional fiber bronchoscopy and end expiratory positive pressure ventilation in the treatment,observation group patients on the basis of the application of lung recruitment method to carry on the treatment.Observation compared two groups of patients with lung recruitment maneuver and respiration and circulation of the parameter variations and mechanical ventilation in time.Results Two groups of patients with treatment of the parameters,the difference was not statistically significant (P ＞0.05);after treatment,observation group of patients with oxygen synthetic index and mechanical ventilation time and the control group was significant difference compared with statistical significance(P ＜ 0.05);and two groups of patients with arterial carbon dioxide into change of pressure and tidal volume before and after the treatment were not significant,no statistical significance(P ＞ 0.05).Two groups of patients with the circulatory system index tends to be stable,no significant change (P ＞0.05).Conclusion The use of bronchoscopy in patients with aortic dissection after the examination of hypoxia,application of lung recruitment maneuver method for treatment,can improve the patient's oxygenation index,reduce the time of mechanical ventilation in patients with.

Objective:Analysis the protective effect of the partial femoral to femoral cardiopulmonary bypass(CPB) on thoracoabdominal aortic aneurysm repair(TAAAR).Methods:From September 2016 to August 2020, 50 cases of TAAAR under partial CPB were performed at our hospital. Thirty males and 20 females with an average age of(40.5±12.4) years old(ranging 21 to 69 years old) were involved. Partial CPB without selective organ perfusion were applied at the early stage. Since November 2019, the adjunct of perfuse the celiac and superior mesenteric artery with warm blood and irrigate the renal artery with 4℃ HTK solution was used in TAAAR, and 25 patients were operated under this adjunct.Results:The average CPB time was(116.9±35.4) min, the lowest central body temperature during the partial CPB was(34.7±0.7)℃. Total early postoperative mortality was 6%(3/50, 3 deaths in partial CPB alone group). Paraplegia occurred in 4 cases(8%), new happened postoperative hemodialysis was in 6 cases(16%). Among the hemodialysis event, 2 cases(8%, 2/25) were in the group with selective organ perfusion, and 4 cases(16%, 4/25) in the group without using the adjunct.Conclusion:Mild hypothermic partial cardiopulmonary bypass combined with selective organ perfusion have protective effects on spinal cord and abdominal organ in patients underwent TAAAR.

The end of the COVID-19 infection peak in 2022 prompts a backlog of cardiovascular surgical patients to gradually return to the hospital, resulting in a surge in cardiovascular surgeries. However, against the backdrop of the COVID-19 pandemic, the clinical practice of cardiovascular surgery faces many problems. Therefore, organized by Beijing Anzhen Hospital, experts in cardiovascular surgery and related fields have formulated hospital expert experience on perioperative treatment principles of cardiovascular surgery for patients infected with COVID-19. This article summarizes the clinical decision-making of patients requiring cardiovascular surgery after COVID-19 infection, and advises on the corresponding recommendations according to the existing evidence-based medical evidence as well as the actual clinical practice experience of relevant experts. The main content of the article includes special requirements for cardiovascular surgical treatment indications in patients with COVID-19 infection, selection of surgical timing, special requirements of preoperative, intraoperative and postoperative management, etc., which aims to provide COVID-19-infected patients with guidance on rational decision-making when receiving cardiovascular surgery.