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Table of Content

    20 October 2021, Volume 21 Issue 05
    Case Analysis
    Transarterial chemoembolization combined with Lenvatinib bridging in the treatment of 2 patients with hepatocellular carcinoma exceeding Milan standard liver transplantation
    LU Xu, LI Hua, YI Shu-hong, ZHAO Hui, ZHU Shu-guang, LI Hai-bo, YANG Yang, WANG Guo-ying
    2021, 21(05):  507-511.  DOI: 10.3969/j.issn.1009-976X.2021.05.003
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    Objective To explore new plans for liver cancer down-staging or bridging therapy before ultra-Milan standard liver cancer transplantation, and to evaluate the safety and efficacy of Transarterial chemoembolization combined with Lenvatinib in the treatment of ultra-Milan standard liver cancer after liver transplantation. Methods Retrospective analysis was performed on the clinical data of 2 cases of patients with ultra-Milan standard liver cancer successfully bridged by liver transplantation after transarterial chemoembolization for treatment combined with targeted therapy of Lenvatinib in our center. The prognosis of the patients was evaluated by regular reexamination of serological markers, CT examination or liver color ultrasound, so as to evaluate the clinical possibility and usability of the new bridging protocol. Results The first patient for liver cancer with portal venous tumor emboli right branch of, for liver cancer stage (CNLC stage IIIa) in our country, after Transarterial chemoembolization combined with Lenvatinib bridging for 2 months, patients received liver transplantation, postoperative incision healed well, postoperative pathological suggest most tumor necrosis, only a few members of the heterocyst around the cell mass. Regular follow-up of 16 months, no tumor recurrence was observed. The Second patientwith liver cancer associated with liver vein invasion, as CNLC stage IIIa, after Transarterial chemoembolization combined with Lenvatinib bridging for one month, oncology evaluation for SD, patient received allogeneic orthotopic liver transplantation, postoperative incision healing is good. Postoperative pathology showed that most of the tissues were necrotic, and only a few tumor cells were arranged in cord like and adenoid. No recurrence of tumor was found in regular follow-up for 14 months. Both patients had normal liver function and no other complications occurred. Conclusion Transarterial chemoembolization for treatment combination with Lenvatinib can better control tumor progression in advanced liver cancer, and can be used as an effective bridging therapy for ultra-Milan standard liver cancer before liver transplantation. The short-term prognosis is good, and the influence on abdominal incision and the long-term efficacy of patients need to increase the sample size and long-term follow-up.
    Original Articles and Clinical Research
    The application study of enhanced recovery after surgery (ERAS) in the laparoscopy combined with choledochoscopy in the treatment of choledocholithiasis
    CHEN Hai-jun, SUN Zi-cheng, LIU Yan, FAN De-biao, HUANG Zhong-xian, ZHANG Ti
    2021, 21(05):  516-520.  DOI: 10.3969/j.issn.1009-976X.2021.05.005
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    Objective To explore the feasibility and safety of laparoscopic combined with choledochoscopy in the treatment of choledocholithiasis and the clinical value of ERAS strategy in biliary surgery. Methods A total of 36 cases with choledocholithiasis were treated by laparoscopy combined with choledochoscopy from July 2019 to Dec 2020 and the patients were divided into an ERAS group (n=20) and a routine group (n=16). All surgical procedures were performed by the same surgeon. The postoperative recovery, incidence of complications, hospitalization costs, and liver function, inflammatory and stress indicators were compared between the two groups. Results The recovery time of intestinal function, the indwelling time of abdominal drainage tube, the days of postoperative hospital stay and hospitalization cost in the ERAS group were less than those in the routine group (P<0.05). There were no significant difference in the incidence of complications between the two groups(P>0.05). There were no significant differences in the levels ALT,DBIL,WBC, CRP,Cor,NE and ACTH between the two groups before surgery and on the 1st day after surger (P>0.05). The levels of ALT, DBIL, WBC, CRP, Cor, NE and ACTH in both groups on the 3rd day after surgery were markedly lower than those on the 1st day after surgery (P<0.05). On the 3rd day after surgery, the indicators of WBC,CRP,Cor,NE and ACTH in the ERAS group were lower than those in the routine group (P<0.05). No significant change was revealed in the indicators of transaminase and bilirubin in the ERAS group compared with the routine group (P<0.05). Conclusion Under the strict operation indication, laparoscopic combined with choledochoscopy in the treatment of choledocholithiasis is safe, effective and feasible. The concept of ERAS can reduce body inflammation and stress response, accelerate patient rehabilitation and minimize the cost of treatment.
    The timing and clinical experience of percutaneous cholecystostomy in the treatment of moderate to severe acute cholecystitis
    CAI Yi-feng, ZHANG Mei-hua
    2021, 21(05):  521-525.  DOI: 10.3969/j.issn.1009-976X.2021.05.006
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    Objective To discuss the timing and clinical experience report of percutaneous cholecystostomy (PC) for the treatment of acute cholecystitis. Methods A retrospective analysis of clinical data was performed in patients diagnosed with acute cholecystitis (AC) from January 2015 to January 2021. According to the Tokyo Guidelines 2013 (TG13), patients with AC severity grade Ⅱ (moderate) and grade Ⅲ(severe) were screened for clinical evaluation, including clinical characteristics, treatment, hospital stay, outcome, morbidity and 30-day death. Results A total of 134 patients were included in the study, with a median age of 63.5 years. Among them, 41 received PC (PC group), Charlson Complication Index (CCI): 0 points in 18 cases (43.9%), 1 point in 11 cases (26.8%), ≥ 2 points in 12 cases (29.3%); 77 received conservative treatment (conservative group), CCI: 0 points in 31 cases (40.2%), 1 point in 18 cases (23.4%), ≥ 2 points in 28 cases (36.4%); 26 had cholecystectomy, CCI: 0 points 17 (65.4), 1 point 5 (19.2), ≥ 2 points 4 (15.4); The patients were followed up for 60 days in which 12 were lost to follow-up. Among the three different management groups, compared with the conservative group, the PC group showed faster WBC reduction, less antibiotic administration time, and shorter hospital stay; but compared with the cholecystectomy group, there was no advantage in hospital stay and antibiotic administration time. PC group: WBC decreased significantly on the first day after bile drainage (compared with admission, P<0.001); the average time of antibiotic use was 11.4±2.6 days; 25 cases (25/38) were performed delayed LC, and the main complication was drainage tube dislocation 3 For example, one patient died of septic shock and heart failure on the second day after PC operation. Conservative treatment group: antibiotic treatment and nutritional support were mainly taken. WBC decreased significantly 3 days after admission, which was significantly different from that at admission (P<0.001); antibiotics were used for 12.9±3.1 days; 43 cases (43/65) underwent LC; 4 patients died, 4 days, 7 days, 15 days and 24 days after admission, respectively. The causes of death included severe infection, MODS, pulmonary embolism and cerebral hemorrhage; 4 cases (6.2%, 4/65) recurrence within 60 days after surgery. Conclusion For patients with moderate to severe AC, the management should be selected according to the actual situation of the patient. PC is an effective treatment for patients with moderate to severe AC who is not suitable for surgery, and early use is recommended.
    Clinicopathological analysis of 56 cases of splenic metastatic tumor
    HUANG Guo-hui, LIU Yan-ping, WANG Sheng-yan, ZHANG Long
    2021, 21(05):  526-530.  DOI: 10.3969/j.issn.1009-976X.2021.05.007
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    Objective To investigate the clinicopathological features of splenic metastatic tumor in order to improve the understanding of the disease. Methods The clinical data and pathological features of 56 patients with splenic metastatic tumor in Sun Yat-sen Memorial Hospital of Sun Yat-sen University from January 2012 to December 2020 were analyzed retrospectively, and the related literatures were reviewed. The tumor of lymphatic hematopoietic system involving spleen was excluded. Results There were 139 cases of splenic tumors, accounting for 11.82% of the cases of splenic surgery in our hospital in the same period. There were 44 cases of splenic lymphohematopoietic system-related tumors and 95 cases of non-lymphohematopoietic tumors, including 56 cases of metastatic tumors. Metastatic tumors accounted for 4.76% of the cases of splenic surgery in our hospital in the same period, and 40.29% of splenic neoplastic lesions in our hospital in the same period. Among the 56 patients with splenic metastatic tumors, there were 26 males and 30 females. The age of onset was ranged from 30 to 76 years old, and the average age was 53 years old. Fifty-six cases of splenic metastatic tumors included pancreatic tumor (19 cases), ovarian cancer (13 cases), gastric tumor (9 cases), liver cancer (6 cases), intestinal adenocarcinoma (4 cases), appendiceal mucinous adenocarcinoma (2 cases), uterine choriocarcinoma (1 case), breast invasive ductal carcinoma (1 case) and lung cancer (1 case). The pathological morphology of metastatic tumor was similar to that of primary tumor, and immunohistochemical staining further confirmed the diagnosis. Conclusion The primary tumors of splenic metastases come from a wide range of sources, and the most common primary tumors are high-grade serous adenocarcinoma of the ovary and ductal adenocarcinoma of the pancreas. The combination of clinical, imaging and pathology is helpful to the correct diagnosis.
    Pathological and bacteriological observation of the inner surface of adult inguinal hernia sac
    GAN Wen-chang, LI Ying-ru, ZHOU Tai-cheng, JIANG Zhi-peng, HOU Ze-hui, MA Ning, CHEN Shuang
    2021, 21(05):  531-534.  DOI: 10.3969/j.issn.1009-976X.2021.05.008
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    Objective To investigate whether local thickening of inguinal hernia sac is related to bacterial infection. Methods From June 2015 to December 2016, 68 patients diagnosed as inguinal hernia in the Sixth Affiliated Hospital of sun Yat-sen University were selected. According to whether the hernia sac was thickened or not, the hernia sac was divided into thickened group and smooth group. The tissue structure composition and inflammatory cell count of the two groups were observed and compared, and the presence of bacterial DNA was detected by real-time fluorescence quantitative PCR. Results The incidence of internal lateral thickening of the hernia sac was 66.1% (37/68), which was related to the course of disease (disease course <1 y 39.1%,1 y~5 y 46.1%,>5 y 84.2%), previous incarceration (75% vs. 45.8%) and adhesion (95% vs. 37.5%). Microscopic observation of the thickened hernia sac showed thickened fibrous connective tissue with more inflammatory cell infiltration(Neutrophils 15.2±2.3 vs. 2.5±0.7, lymphocytes 35.3±1.9 vs. 12.8±1.4, plasma cells 2.6±0.6 vs. 1.5±0.4, a total of 53.1±1.3 vs. 16.8±1.2, P < 0.05) and telangiectasia (67.6% vs. 25.8%, P<0.05). DNA expression of e. coli was positive in 2 cases in the thickening group and 1 case in the smooth group. Conclusion Inguinal hernias, especially those with a long course and history of incarceration, may have local bacterial infection.
    Ubiquitous mitochondrial creatine kinase regulates cell proliferation and metastasis in colorectal cancer (CRC) by targeting PI3K/AKT/mTOR signaling pathway
    TANG Xing-kui, LIN Yu-kun, HE Jia-lin, LUO Xi-jun, LIANG Jun-jie, ZHU Xian-jun
    2021, 21(05):  535-540.  DOI: 10.3969/j.issn.1009-976X.2021.05.009
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    Objective Ubiquitous mitochondrial creatine kinase (uMtCK) plays an important role in the occurrence and progression of tumor. In this study, we aimed to clarify the potential role and regulatory mechanism of uMtCK in colorectal cancer (CRC). Methods We detected the expression levels of uMtCK in CRC tissues of our center, using quantitative real-time polymerase chain reaction. uMtCK downregulated CRC cells were constructed using siRNA transfection, and then cell proliferation, metastasis capacities and related pathways were identified by Cell Counting Kit-8, Transwell and Western blot, respectively. Results Our data showed that uMtCK was overexpressed in CRC tissues in contrast to adjacent nontumor tissues, and the relative expression levels of uMtCK were closely associated with T classification (P=0.002), N stage (P=0.000), TNM stage (P=0.000) and disease-free rates. In addition, downregulation of uMtCK could significantly suppress proliferation, inhibit migration and invasion, and reverse PI3K/AKT/mTOR signaling pathway. Conclusion uMtCK enhanced the proliferation and metastasis of CRC cells by regulating PI3K/AKT/mTOR signaling pathway, and uMtCK might be a prospective target of CRC therapy.
    Endogenous miR103A promotes metastasis in breast cancer by targeting RGS2 gene
    CHEN Xin-xin, ZHANG Le-hong
    2021, 21(05):  541-546.  DOI: 10.3969/j.issn.1009-976X.2021.05.010
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    Objective To explore the endogenous mir-103A that induces metastasis of breast cancer by downregulating tumor suppressor gene RGS2 through acting on its promoter. Methods Deep-sequencing was practiced to select target small RNAs in breast cancer tissue and normal tissue, and microRNA information retrieval system was used to match the target genes of miR103A. QPCR and Western-Blot were used to detect the expression of RGS2 and possible related genes after the miR103A mimics was transfected into breast cancer cells. The quantitative analysis of RGS2 was performed on cancer and normal tissue from 27 patients. Results Analysis of the deep-sequencing data showed that the major composition of the sequence reads was miRNAs. In addition, the expression of miR103A in breast cancer tissue was significantly higher than that in normal breast tissue. Furthermore, miR103A was found high expressed in HER2+ tumors and in patients with lymph node involved. MiR103A could interact with RGS2 by targeting the promoter region, which leading to a downregulated of RGS2 at both mRNA and protein level. miR103A was also found that could upregulate the expression of MMP9, VGEF, snail, Vimentin but downregulate the expression of E-cadherin in breast cancer cells. Conclusion Endogenous miRNA103A can mediate the cellular negative regulation induced by RGS2, and may lead to the metastasis of tumor.
    Clinical characteristics of male breast cancer from South China: Analysis of 31 cases
    JIN Xiao-yan, QIN Yan-xiang, LIU Shu-qiong, WU Wei
    2021, 21(05):  547-550.  DOI: 10.3969/j.issn.1009-976X.2021.05.011
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    Perioperative risk factors for anastomotic leakage following radical resection of colon cancer based on propensity score matching
    ZOU Jun, YANG Shu-ting, WANG Kan, ZHAO Zi-ran
    2021, 21(05):  551-555.  DOI: 10.3969/j.issn.1009-976X.2021.05.012
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    Objective To investigate the perioperative risk factors of anastomotic leakage following radical resection of colon cancer. Methods We conducted a retrospective study and involved all patients who underwent radical resection of colon cancer between January 2019 and June 2021 at Sun Yat-sen Memorial Hospital, Sun Yat-sen University. Univariate analysis, multivariate logistic regression analysis and propensity score matching (PSM) analysis were performed according to whether anastomotic leakage occurred after operation to evaluate the risk factors of anastomotic leakage following radical resection of colon cancer. Results 428 patients were included in this study and anastomotic leakage occurred in 17 patients, with an incidence of 3.97%. Multivariate analysis revealed that advanced age, male gender, more intraoperative blood loss, low preoperative albumin, and open surgery were associated with postoperative anastomotic leakage (P<0.05); In order to control age and gender, PSM was then performed and concluded that preoperative albumin less than 30 g/L and intraoperative blood loss >300 ml were associated with the occurrence of anastomotic leakage (P<0.05), and there was no significant difference in open surgery (P=0.079). Conclusions More intraoperative blood loss and low preoperative albumin were independent risk factors leading to anastomotic leakage.
    Comparative study on acute wound in mice by using medical glue for dressing change
    CAO Yi, PENG Ji-cai, ZHONG Guang-zheng, ZHU Jie
    2021, 21(05):  556-560.  DOI: 10.3969/j.issn.1009-976X.2021.05.013
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    Objective To investigate whether the healing speed of acute skin avulsion wound in mice was different between medical glue and traditional dressing change. Methods Eighteen C57 mice were randomly divided into three groups to make acute skin avulsionwounds, six mice in each group, namely medical glue group, vaseline group, and control group. The dressing were changed every 2 days for a total of 10 days. On the 0 th, 2 th, 6 th and 10 th days, the condition of wound healing was observed, the expressions of inflammatory mediators IL-6 and TNF-α were detected by Western blotting and ELISA respectively. On the 10 th day, the expression of IL-6 and TNF-α were observed by immunohistochemistry. Results On the 2 th, 6 th and 10 th days,the healing speed of the glue group was the fastest, followed by the control group, and the vaseline group was the slowest. For the expressions quantity of the IL-6 and TNF-α by Westernblotting and ELISA, the glue group was the lowest, followed by the control group, and the vaseline group was the highest. On the 10 th day,for the expression levels of IL-6 and TNF-α byimmunohistochemistry, the glue group was the lowest, followed by the control group, and the vaseline group was the highest. Conclusion Compared with traditional dressing change, medical glue can reduce inflammatory mediatorsand accelerate the healing of acute skin avulsion wound.
    Lymph node metastasis of simultaneous multiple primary lung cancer
    SHEN Tao, LU Zhu-ming, DUAN Chu-xiao, ZHANG Dong-xi, YE min, LIN Zhi-chao
    2021, 21(05):  561-565.  DOI: 10.3969/j.issn.1009-976X.2021.05.014
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    Objective To investigate the diagnosis and treatment of multiple primary lung cancer and lymph node metastasis. Methods Ninety-three cases of multiple primary lung cancer from January 2015 to December 2019 were divided into A group (≤10), B group (>10, ≤20) and C group (>20, ≤30) according to the diameter of the main lesion. The age, smoking history, tumor markers and lymph node metastasis in three groups were analyzed. Results Multiple primary lung cancers increase in diameter of the main lesion with age, while smoking history has nothing to do with the diameter of the main lesion. CEA (2.00±1.80)μg/mL, Cyfra 21-1 (2.38±1.09)ng/mL, CEA (2.00±1.09) in A group and CEA (2.81±2.52)μg/mL, Cyfra21-1 (2.53±0.76)ng/mL in B group were within the normal ranges. CEA (23.61±46.14)μg/mL and Cyfra21-1(3.54±1.31)ng/mL in C group were significantly higher than those of the A and B group (all P values < 0.05). In A group, only No.10 lymph node had metastasis (5.26%). No.10 (6.90%), No.11 (3.57%), No.5 (16.67%) lymph node had metastasis in B group. In C group, more lymph node had metastasis in N2 lymph node, and the lymph node metastasis rates were 5.44%, 4.60% and 2.22% in No.2, No.4 and No.7, respectively. Different types of lung cancer had different lymph node metastasis. Simultaneous resection of pulmonary nodules on one side, stage pulmonary resection of pulmonary nodule resection in different sides which interval 3 to 12 months. PFS, OS were 100% in 1 year. Conclusion Patients with multiple primary lung cancers on the same side can undergo simultaneous lung nodules resection, while on both sides, lung nodules can be removed by stages, all which has no serious complications and is highly safe. When the diameter of multiple primary lung cancer lesions is ≤ 1 cm, selective lymphadenectomy or lymph node sampling (hilar lymph nodes) is recommended. For those of lesions were greater than 1 cm, the systemic lymph node dissection should be done.
    Full-matrix imaging optimizing the scan sequence of total abdominal MRI in tumor patients
    JIANG Wei, WANG Zhi-hui, CHEN Xin-yin, YU Rui-huan, GAO Ming
    2021, 21(05):  566-570.  DOI: 10.3969/j.issn.1009-976X.2021.05.015
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    Objective To investigate the application value of Tim technique in the optimized scanning scheme of whole abdomen MRI in tumor patients. Methods The Siemens 3.0 MRI (Siemens Skyra 3.0T) was used to carry out contrast-enhanced MRI scan of the whole abdomen in 132 patients clinically diagnosed with tumors. The Tim technology was applied to the optimized scanning scheme of the whole abdomen in 78 patients and the traditional segmental scanning scheme of the whole abdomen in 54 patients. The optimized scanning scheme of the whole abdomen based on Tim technology adopts Tim coil, automatic bed shifting and seamless connection technology. Traditional segmental scanning scheme adopts abdominal and pelvic segmental scanning scheme. The the completion time of two different scanning schemes and the image quality obtained by scanning were compared and discussed. Results The average inspection time of the optimized all-abdominal scanning scheme based on Tim technology was (37.9±6.0)min and the image quality excellence rate was 97.4%. The average inspection time of the traditional segmental scanning scheme was (47.2±3.3)min and the image quality excellence rate was 96.2%. The examination time of the Tim technique is significantly shorter than that of the traditional segmental scanning scheme (P<0.01), and the visual and clear continuous and complete images of the whole abdominal organs, retroperitoneal vessels and abdominal vessels can be obtained. Conclusion The optimized scanning scheme of the whole abdomen based on Tim technology can comprehensively, intuitively and clearly display the structure of abdominal and pelvic organs, and the concise and integrated images can reduce the working intensity of doctors who read the images, which is more suitable for the preoperative and postoperative evaluation of huge lesions and multiple lesions in the abdominal cavity.
    The diagnostic ability of the mean CT value for pulmonary ground glass nodules which less than 1 cm
    CHEN Shuai, ZHANG Wei, YIN Lei, YU Qing-hua, MA Ming-ping
    2021, 21(05):  571-573.  DOI: 10.3969/j.issn.1009-976X.2021.05.016
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    Objective To evaluate the diagnostic ability of the mean CT value for pulmonary ground glass nodules which were less than 1 cm. Methods We retrospectively evaluated 216 patients with ground glass nodules less than 1 cm between 2016 and 2020. All these ground glass nodules were resected and pathologically diagnosed. The mean CT value were measured in picture archiving and communication system(PACS) and its optimal cut-off point for the mean CT value was analyzed with receive operating characteristic(ROC) curve. Results The mean CT value of inflammatory lesion group was -782 ~ -377(-595.9±122.3) Hounsfield units(HU), which was lower than lung adenocarcinoma group which the mean CT value was -807 ~ -57(-494.3±157.4)HU(t=-2.190,P<0.05). The cut-off point was -604 HU, the sensitivity was 73.5% and the specificity was 67.3%, the area under curve(AUC) was 0.69. The mean CT value of the preinvasive group was -807 ~ -111(-540.1±131.1)HU, and The mean CT value of the invasive group was -807 ~ -57(-464.8±166.2)HU. The difference between the two group statistically significant (t=-2.66,P<0.05). The cut-off point was -473 HU, the sensitivity was 50.8% and the specificity was 75%, the AUC was 0.64. Conclusion Themean CT value is valuable in the differential diagnosis of benign and malignant lesion in the ground glass nodules which was less than 1 cm, and it is helpful to judge the invasiveness of the lung adenocarcinoma.
    Application of dexmedetomidine versus dexamethasone in lumbar plexus block with ropivacaine
    HUANG Hai-ming, YE Xi-jiu, YUAN Yuan
    2021, 21(05):  574-577.  DOI: 10.3969/j.issn.1009-976X.2021.05.017
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    Objective To compare the clinical outcomes of dexmedetomidine versus dexamethasone in combination with ropivacaine used for lumbar plexus block. Methods A total of 90 adult patients undergoing unilateral knee or thigh surgery were divided into 3 groups: Control, dexmedetomidine and dexamethasone (30 cases in each group). All patients received posterior lumbar plexus block guided by ultrasound and nerve stimulator, during which ropivacaine 0.375% in the volume of 0.5 mL/kg was injected in the control group, and the equivalent anesthetic plus dexamethasone 0.1 mg/kg or dexmedetomidine 1 μg/kg was injected in the other two groups. The onset time and duration of sensory, motor block were compared among groups. The VAS pain scores, dosage of analgesics and incidence of complications were recorded after surgery. Results The onset time of sensory and motor block in the two experimental groups were faster than that of group Control (P<0.05), and the duration of sensory and motor block in the two experimental groups were longer than that of group Control (P<0.05), with significant difference between group dexmedetomidine and group dexamethasone. The VAS pain scores and dosage of analgesics in the two experimental groupswere lower than those of group Control (P<0.05), with lower values in group dexmedetomidine than in group dexamethasone. There was no significant difference in complications among the three groups (P>0.05). Conclusion While mixed with ropivacaine for lumbar plexus block, both dexmedetomidine and dexamethasone can accelerate onset time of block, prolong block duration and reduce postoperative pain, with better outcomes provided by dexmedetomidine thanby dexamethasone.
    Analysis and countermeasures of difficulty in PICC delivery of patients after heart transplantation
    QU Ying-ying, MO Chun-ling, CHENG Zi-liang, LI Yan, LI Bao-qi
    2021, 21(05):  578-581.  DOI: 10.3969/j.issn.1009-976X.2021.05.018
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    Objective To investigate the reasons for the difficulty in delivery of a high-pressure-resistant dual-chamber PICC in patients after heart transplantation, and to provide corresponding countermeasures to improve the success rate of delivery. Methods A retrospective analysis of the causes and countermeasures of difficulty in delivery of a high-pressure PICC after heart transplantation. Results Five of 23 patients with catheterization after heart transplantation had difficulty in delivery. Among them, two cases of difficulty in delivery were caused by stenosis and malformation caused by venous scars, one case was abnormal vein anatomy, and left brachiocephalic vein was cut during transplantation; one case was due to positional factors or catheter factors or hemodynamic factors; one case was not found for specific reasons. Conclusion In the case of difficult tube delivery in post-transplant cardiac patients, in addition to considering the patient's venous condition, body position placement, and the material of the catheter itself, the hemodynamic changes in the postoperative patient should not be ignored. In order to reduce the occurrence of difficult tube delivery, pre-tubing venous assessment should be done adequately to exclude malformations and stenosis. Therefore, it is particularly important to know the patient's trauma history, surgical history, intraoperative conditions, and to review previous CT findings.
    Review
    Anatomy of anterior cruciate ligament and its influence on operation
    MA Ming-liang, LI Jian, XU Chuang, CAO Heng, WANG Lin-wei, HUANG Kai-yue, ZHANG Li-chao, LIU Ming-ting
    2021, 21(05):  584-590.  DOI: 10.3969/j.issn.1009-976X.2021.05.020
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    Anterior cruciate ligament (ACL) is one of the most important ligaments in the knee joint. At the same time, ACL injury is also a relatively common sports injury. At present, anterior cruciate ligament reconstruction (ACLR) is a traditional method for the treatment of anterior cruciate ligament injury, which can better maintain the stability of the knee joint after surgery. However, there are many options for the anatomy of ACL and the surgical methods and bone tunnel shape of ACLR. The purpose of this paper is to summarize the new progress of ACL anatomy research and its impact on ACLR technology.