ObjectiveTo investigate the differences between indocyanine green (ICG) plus methylene blue and radioactive nuclide plus methylene blue for sentinel lymph node biopsy (SLNB) after Neoadjuvant chemotherapy (NAC) in breast cancer patients. Methods A total of 77 breast cancer patients who accepted SLNB and axillary lymph node dissection (ALND) after NAC from June 2017 to February 2019 were involved, among them, 46 breast cancer patients accepted SLNB by ICG plus methylene blue and 31 breast cancer patients accepted SLNB by radioactive nuclide plus methylene blue, pathological and clinical data were collected and analyzed.ResultsThere were 43 patients in the ICG plus methylene blue group and 30 patients in radioactive nuclide plus methylene blue group, which totally 73 patients were detected at least one sentinel lymph node in all the 77 patients, and the detection rate was 94.80%. The SLN detected rate, SLN detected numbers, sensitivity, false negative rate, and accuracy of the ICG plus methylene blue group were 93.48% (43/46), 2.32 per case, 82.61% (19/23), 17.39% (4/23), and 90.70% (39/43) respectively, as well as 96.77% (30/31), 2.6 per case, 83.33% (10/12), 16.67% (2/10), and 93.33% (28/30) in the radioactive nuclide plus methylene blue group. There was no significant difference between the ICG plus methylene blue group and radioactive nuclide plus methylene blue group in terms of SLN detected rate, SLN detected numbers, sensitivity, false negative rate, and accuracy (P>0.05).ConclusionICG plus methylene blue showed similar SLN detection rate, SLN detected numbers, sensitivity, false negative rate, and accuracy as radioactive nuclide plus methylene blue for SLNB in breast cancer patients after NAC, and both of them can be performed easily and conveniently.
ObjectiveTo investigate the clinical value of magnetic resonance imaging (MRI) combined with ultrasound (US) contrasting with MRI in evaluating the pathological complete response (pCR) of breast cancer after neoadjuvant chemotherapy (NAC).MethodsThe imaging data of patients with primary invasive breast cancer who completed the surgical resection after NAC and met the inclusion criteria in the Breast Disease Diagnosis and Treatment Center of Affiliated Hospital of Qingdao University from December 2016 to December 2019 were collected retrospectively. These patients were evaluated by MRI and MRI combined with US examination respectively. The results of MRI alone and MRI combined with US were designed into imaging of complete remission (rCR) and imaging of non-complete remission (non-rCR). With results of postoperative pathology as the gold standard, the sensitivity, specificity, and positive predictive value (PPV) of MRI alone and MRI combined with US in predicting pCR of patients with rCR or non-rCR were calculated and which were further analyzed in the 4 subtypes of breast cancer (HR+/HER2+, HR+/HER2–, HR–/HER2+, and HR–/HER2– subtype).Results① According to the inclusion and exclusion criteria, a total of 146 patients with primary invasive breast cancer were included, including 34 cases of HR+/HER2+subtype, 63 cases of HR+/HER2– subtype, 23 cases of HR–/HER2+ subtype, and 26 cases of HR–/HER2– subtype. ② After NAC, 36 cases had a pCR, among which 9 cases (26.5%) were in HR+/HER2+ subtype, 10 cases (15.9%) were in HR+/HER2– subtype, 8 cases (34.8%) were in HR–/HER2+ subtype, and 9 cases (34.6%) were in HR–/HER2– subtype. ③ After NAC, 22 (78.6%) of the 28 patients evaluated by MRI alone achieved pCR, 17 (81.0%) of the 21 patients evaluated by MRI combined with US achieved pCR, and the PPV value of pCR evaluated by MRI alone and MRI combined with US was 78.6% and 81.0%, respectively. ④ Both MRI alone and MRI combined with US predicted NAC showed the highest PPV values in patients with HR–/HER2– subtype breast cancer (85.7% and 100%, respectively), and the lowest values in HR+/ HER2– subtype breast cancer (71.4% and 60.0%, respectively).ConclusionFor the overall patients with primary invasive breast cancer, MRI combined with US is superior to MRI alone in the evaluation of efficacy after NAC, and among the patients with different subtypes of breast cancer, except HR+/HER2– subtype, MRI combined with US is still more effective in predicting efficacy after NAC than MRI alone.
ObjectiveTo evaluate the performance and safety of a novel device for left atrial appengdage (LAA) closure in dogs. MethodsThrough the fourth left intercostal, the LAA clips were implanted at the base of LAA in six dogs. Macroscopic pathology, histopathology and biological detection were performed at 7 d, 60 d, 90 d, 180 d after implan-tation respectively. ResultsThe devices were all successfully implanted at the base of LAA. There is no transposition of the LAA clips. Complete fibrosis and atrophy of LAA occurred at 60 d after implantation. LAA closure was completed with a new endothelial tissue layer developed on the occluded orifice of the left atrium after 60 d after implantation. The level of atrial natriuretic peptide did not decrease significantly after the device implantation (275.64±60.00 pg/ml vs. 248.34±56.10 pg/ml, P=0.529). ConclusionThe novel device for LAA closure achieved easy, reliable and safe closure of the LAA in canine model.
ObjectiveTo verify the influence of different variable selection methods on the performance of clinical prediction models. MethodsThree sample sets were extracted from the MIMIC database (acute myocardial infarction group, sepsis group, and cerebral hemorrhage group) using the direct entry of COX regression, step by step forward, step by step backward, LASSO, and ridge regression, based on random forest. These existing six methods of variable importance algorithm, and the optimal variable set of different selected methods were used to construct the model. Through the C index, the area under the ROC curve (AUC value) and the calibration curve, and the results within and between groups were compared. ResultsThe variables and numbers selected by the six variable selection methods were different, however, whether it was within or between groups did not reflect which method had the advantage of significantly improving the performance of the model. ConclusionsPrior to using the variable selection method to establish a clinical prediction model, we should first clarify the research purpose and determine the type of data. Combining medical knowledge to select a method that can meet the data type and simultaneously achieve the research purpose.
Abstract: Objective To observe the influence of various methods of cerebral protection during deep hypothermic circulatory arrest (DHCA ) on S-100 protein. Methods Eighteen dogs were randomly and equally divided into three groups: the deep hypothermic circulatory arrest (DHCA group ) , the DHCA with retrograde cerebral perfusion (DHCA + RCP group ) , and the DHCA with intermittent antegrade cerebral perfusion (DHCA + IACP group ). Upon interruption of cardiopulmonary bypass (CPB) , the nasopharyngeal temperature was slowly lowered to 18℃, before CPB was discontinued for 90 minutes, after 90 minutes, CPB was re-established and the body temperature was gradually restored to 36℃, then CPB was terminated. Before the circulatory arrest, 45min, 90min after the circulatory arrest and 15min, 30min after re-established of CPB, blood samples were drawn from the jugular veins fo r assay of S-100 protein. Upon completion of surgery, the dogs was sacrificed and the hippocampus was removed from the brain, properly processed for examination by transmission electron microscope for changes in the ultrastructure of the brain and nerve cells. Results There was no significant difference in the content of S-100 protein before circulatory arrest among all three groups (P gt; 0.05). After circulatory arrest, DHCA and DHCA +RCP group showed an significant increase in the content of S-100 protein (P lt; 0.01). There was no significant difference in the content of S-100 protein after circulatory arrest in DHCA + IACP group. Conclusion Cerebral ischemic injuries would occur if the period of DHCA is prolonged. RCP during DHCA would provide protection for the brain to some extent, but it is more likely to cause dropsy in the brain and nerve cells. On the other hand IACP during DHCA appears to provide better brain protection.
ObjectiveTo explore the difference of myocardial injury between off-pump coronary artery bypass grafting (OPCAB) and modified perfusion on-pump coronary artery bypass grafting (ONCAB).MethodsA total of 558 patients who underwent coronary artery bypass grafting in Beijing Anzhen Hospital from 2017 to 2019 were included. According to whether or not they received modified perfusion cardiopulmonary bypass, all the 558 patients were divided into two groups including an OPCAB group (OP group) and an ONCAB group (ON group). There were 465 patients in the OP group including 282 males and 183 females with an average age of 63.58±7.87 years. In the ON group, there were 93 patients including 64 males and 29 females with an average age of 63.91±7.51 years. Creatine kinase MB (CK-MB) and cardiac specific troponin I (cTnI) were measured 24 hours before operation, 30 minutes after operation, 12 hours after operation, 36 hours after operation and 48 hours after operation.ResultsNo perioperative death occurred in all patients. CK-MB (5.00 ng/mL vs. 8.60 ng/mL, Z=–2.189, P=0.029) and cTnI (3.00 ng/mL vs. 7.80 ng/mL, Z=–5.307, P=0.000) in postoperative 12 hours in the ON group were less than those in the OP group. CK-MB (5.00 ng/mL vs. 5.60 ng/mL, Z=–2.280, P=0.023) and cTnI (0.10 ng/mL vs. 1.02 ng/mL, Z=–6.418, P=0.000) in postoperative 36 hours in the ON group were less than those in the OP group. cTnI (0.07 ng/mL vs. 0.81 ng/mL, Z=–1.946, P=0.032) in postoperative 48 hours in the ON group was less than that in the OP group.ConclusionCompared with OPCAB, modified perfusion ONCAB has less myocardial damage.
ObjectiveTo investigate the influence of different discontinuation time of clopidogrel and aspirin before off-pump coronary artery bypass grafting on postoperative volume of drainage and blood products imported.MethodsA total of 454 patients who underwent coronary artery bypass grafting in Beijing Anzhen Hospital from January 2017 through December 2019 were included. According to the preoperative discontinuation of clopidogrel and aspirin, all the 454 patients were divided into three groups including a guide group, a non-stop group and a stop group. There were 86 patients in the guide group including 59 males and 27 females with an average age of 64.12±6.15 years. They continued to take aspirin 100 mg/d before operation, but stopped clopidogrel for more than 5 days. In the non-stop group, there were 234 patients including 141 males and 93 females with an average age of 63.71±7.01 years. They continued to take aspirin 100 mg/d before operation, and stopped clopidogrel <5 days. In the stop group, there were 134 patients including 76 males and 58 females with an average age of 62.90±7.78 years. They stopped aspirin and clopidogrel for more than 5 days before operation. The clinical effectiveness was compared among the three groups.ResultsNo perioperative death occurred in all patients. There was no statistical difference in platelet count, coagulation function, liver function, renal function, or myocardial markers among the groups (P>0.05). The hemoglobin [97 (15) g/ L vs. 98 (21) g/L vs. 100 (20) g/ L, F=4.894, P=0.008] in the non-stop group was lower than that in the guide group and the non-stop group at 30 minutes postoperatively. The flow volume (399.87±127.19 mL vs. 367.05±125.89 mL vs. 349.63±130.68 mL, F=7.770, P=0.000) in the non-stop group at 3 hours postoperatively, the flow volume [600 (300) mL vs. 580 (245) mL vs. 550 (350) mL, Z=8.218, P=0.016] in the non-stop group at 6 hours postoperatively, the flow volume [750 (370) mL vs. 730 (350) mL vs. 730 (350) mL, Z=8.329, P=0.016] in the non-stop group at 12 hours postoperatively, the flow volume [890 (365) mL vs. 850 (340) mL vs. 850 (350) mL vs. Z=6.585, P=0.037] in the non-stop group at 24 hours postoperatively and the flow volume [950 (375) mL vs. 940 (360) mL vs. 940 (380) mL, Z=8.680, P=0.013] in the non-stop group at 48 hours postoperatively were more than those of the guide group and the stop group. The retention time of drainage tube was longer in the non-stop group [3 (1) d vs. 3 (1) d vs. 3 (1) d, Z=6.579, P=0.037] than in the guide group and the non-stop group. The amount of suspended erythrocytes input [0 (2) U vs. 0 (2) U vs. 0 (0) U, Z=6.150, P=0.046], and the amount of plasma input [200 (200) mL vs. 0 (200) mL vs. 0 (200) mL, F=4.144, P=0.016], the number of cases of plasma input (119 patients vs. 34 patients vs. 47 patients, Z=10.116, P=0.006) were more than those of the guide group and the stop group.ConclusionAspirin maintenance is recommended for patients before off-pump coronary artery bypass grafting. If not necessary, clopidogrel is discontinued for at least 5 days.
ObjectiveTo explore the short-term follow-up clinical effect of transcatheter valve-in-valve implantation treatment for mitral bioprosthesis deterioration.MethodsThe single center data of elderly patients with mitral valve bioprosthetic dysfunction who received transapical J-Valve intervention between January 2019 and May 2020 were reviewed and summarized. After the informed consent was signed, single lumen endotracheal intubation was performed under general anesthesia in hybrid operating room. The left intercostal small incision was used to explore the apical area. Fluoroscopy and three-dimensional esophageal ultrasound were used to guide the puncture needle. Then the guide wire entered the left atrium through the mitral valve biological valve. The catheter was exchanged, and the rigid support wire was exchanged. The reverse loaded J-Valve system was guided and implanted into the biological mitral valve with beating heart. The appropriate implantation depth was adjusted, and stent valve was released under rapid pacing. Post balloon dilation of the valve was performed if necessary.ResultsFrom January 2019 to May 2020, transcatheter J-Valve implantation was completed in 20 patients with mitral valve dysfunction and high-risk evaluation of routine thoracotomy and cardiopulmonary bypass (the Society of Thoracic Surgeon score above 6). In terms of the type of the the mitral bioprosthesis, there were 6 cases of Hancock valves, 7 cases of Perimount valves, 6 cases of Epic valves, and 1 case of Baxiter valve. In terms of the size of the the mitral bioprosthesis, there were 2 cases of size 29 valves, 11 cases of size 27 valves, and 7 cases of size 25 valves. One valve fell into the left ventricle at early stage. One patient had mild valve displacement during operation, and a second valve was implanted at the same time. The success rate of valve-in-valve implantation was 95%. The length of stay in intensive care unit was less than 6 h in 5 cases, 6-24 h in 13 cases, 24-48 h in 1 case, and more than 48 h in 1 case. No patient’s postoperative mitral regurgitation was moderate or above. The mean mitral valve pressure gradient was (5.2±2.3) mm Hg (1 mm Hg=0.133 kPa). Patients recovered well after the valve-in-valve implantation treatment, with no death within postoperative one month. One patient died of infection and multiple organ failure during follow-up after one month. Other patients recovered smoothly without serious complications.ConclusionsThe clinical effect of J-Valve intervention in the treatment of mitral valve bioprosthetic dysfunction through apical approach is good. The implantation can be completed under beating heart, avoiding cardiopulmonary bypass and routine thoracotomy cardiac arrest, which is worthy of further observation and follow-up.
ObjectiveTo explore the effect of whether or not to stop beating after conversion to cardiopulmonary bypass (CPB) in off-pump coronary artery bypass grafting.MethodsFrom 2016 to 2018, 177 patients with off-pump coronary artery bypass grafting in Beijing Anzhen Hospital were transferred to CPB. According to whether they stopped beating after conversion to CPB during the operation, they were divided into two groups. A non-stop beating group: there were 76 patients with 45 males, 31 females. aged 63.53±6.98 years, who were not to stop beating after conversion to CPB. A stop beating group: there were 101 patients with 66 males and 35 females, aged 63.98 ± 8.37 years, who were to stop beating and underwent the modified perfusion and application of papaverine in perfusion after conversion to CPB. The clinical effect of the two groups was compared.ResultsThere were 14 deaths in the perioperative period. The mean graft flow (MGF) in the stop beating group was higher (P=0.033), and the pulse index (PI) was lower (P=0.001) than those in the non-stop beating group. Intra-aortic balloon counter pulsation (P=0.036), extracorporeal membrane oxygenation (P=0.038), continuous renal replacement therapy (P=0.014), ventilator-assisted time (P=0.021), ICU monitoring time (P=0.012), perioperative mortality (P=0.025) and the ejcetion fraction value (P=0.023) were significantly different between the groups.ConclusionCompared with not to stop beating, those to stop beating can get better perioperative clinical effect after conversion to CPB, which is worthy of recommendation.