This article is concerned about the practice and exploration on medical electronics teaching project and teaching pattern we have done before and the Active Participation Pattern thus formed. That is guiding, putting for ward questions, discussing, debating and summarizing in class while setting research problem after class. We also have made media courseware in medical electronics and have used it in our teaching process, which has aroused the students' interest in study and has enhanced the teaching efficiency and quality. This new method of teaching pattern helps us gain the strong feedback and affirmation and is welcome by the students.

Objective To analyze the risk factors and characteristics of bone metastases in patients with prostate cancer. Methods Patients who were diagnosed as prostate cancer by biopsy and histopathologic analysis between June 2006 and June 2016 were included in this study. The clinical data of the patients were reviewed, and the demographic data, laboratory examination results and Gleason score were recorded. The correlations between clinical factors and bone metastasis were analyzed, and the risk factors of bone metastasis were identified. Results A total of 585 patients were recruited in this study, including 228 with bone metastasis and 357 without bone metastasis. Of the patients with bone metastasis, the incidence of pelvic metastasis was the highest, accounting for 81.58%, followed by spin (63.16%) and rib (58.33%), and the incidence of clavicle metastasis was the lowest (14.47%). Logistic regression analysis showed that age <71.5 years, alkaline phosphotase >85.5U/L, prostate-specific antigen >79.88μg/L and Gleason score >7.5 were the risk factors of bone metastasis in prostate cancer. ROC curve analysis showed that the sensitivity of diagnosing bone metastasis was 56.1%, 66.7%, 68.4% and 56.1%, and the specificity was 56.6%, 81.8%, 70.0% and 65.3%, respectively for above 4 factors. Conclusions The most common site of bone metastasis in patients with prostate cancer is pelvis. Patients' age, concentrations of plasma ALP and PSA, and Gleason score are the risk factors for bone metastasis in patients with prostate cancer.

OBJECTIVETo explore new methods for the early diagnosis of pancreatic cancer through detection of K-ras and p53 mutations in pancreatic juice and stool.

METHODS201 patients in PUMC Hospital from 1994 - 2000 and 60 control individuals were enrolled in this study. K-ras point mutation was detected by PCR-RFLP while p53 mutation was detected by PCR-SSCP.

RESULTSK-ras mutation was found in pancreatic juice in 87.8% (36/41) of pancreatic cancer patients and 23.5% (4/17) of benign pancreatic disease patients. In 261 stool specimens, amplification found mutations successfully in 235 patients (90%). K-ras mutation was found in stool in 88% (66/75) of pancreatic cancer patients, 51.1% (24/47) of benign pancreatic disease patients and 19.6% (9/46) of normal individuals. p53 mutation was found in pancreatic juice in 47.4% (18/38) of pancreatic cancer patients and 12.5% (2/16) of benign pancreatic disease patients. p53 mutation was found in stool in 37.1% (23/62) and 19.1% (4/21) of chronic pancreatitis patients.

CONCLUSIONK-ras mutation in pancreatic juice has higher diagnosis sensitivity and specificity, and therefore may be used as a supplement in the diagnosis of pancreatic cancer. Detection of K-ras mutation combined with p53 mutation in stool can aid in the screening of pancreatic cancer.

Feces ; chemistry ; Genes, p53 ; Genes, ras ; Humans ; Mutation ; Pancreatic Juice ; metabolism ; Pancreatic Neoplasms ; diagnosis ; genetics ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; Polymorphism, Single-Stranded Conformational

OBJECTIVETo investigate the clinical advantage of the application of modified Roux-en-Y reconstruction after totally laparoscopic total gastrectomy.

METHODSClinical data of 36 patients who underwent totally laparoscopic total gastrectomy with Roux-en-Y reconstruction by one medical team for gastric adenocarcinoma between January 2014 and December 2014 in the Second Hospital of Jilin University were retrospectively analyzed. Patients were divided into classic Roux-en-Y group (CRY, 16 cases) and modified Roux-en-Y group (MRY, 20 cases) according to reconstructive methods. The data concerning the intraoperative and postoperative situation in two groups were compared.

RESULTSOperation was successfully completed in all the cases without conversion to laparotomy. Compared to CRY group, MRY group had shorter mean operative time [(260.9 ± 21.2) min vs. (287.9 ± 19.0) min, P=0.000], shorter mean reconstruction duration [(32.4 ± 9.2] min vs. (45.4 ± 13.2) min, P=0.001] and less intraoperative bleeding [(50.9 ± 23.5) ml vs. (67.0 ± 20.5) ml, P=0.000]. Jejunum mesentery dissection and jejunum resection were not necessary in MRY group. However, there were no significant differences in lymph nodes harvested, time to flatus, hospital stay and postoperative complications between two groups.

CONCLUSIONSAs compared to classic Roux-en-Y reconstruction, the modified Roux-en-Y reconstruction can simplify the surgical procedures and achieve similar efficacy. It is feasible and safe, and worth further promotion in clinical practice.

Anastomosis, Roux-en-Y ; Humans ; Laparoscopy ; Lymph Nodes ; Mesentery ; Operative Time ; Postoperative Complications ; Postoperative Period ; Retrospective Studies ; Stomach Neoplasms

Adenocarcinoma of esophagogastric junction (AEG) has attracted more attention in recent years. Surgical method of Siewert type Ⅱ AEG is especially controversial, mainly focusing on the scope of lymph node dissection, safety of surgical margin, and digestive tract reconstruction. The abdominal transhiatal approach and right thoracoabdominal Ivor-Lewis approach are the main surgical approaches of totally laparoscopic or thoracoscopic surgery for Siewert type Ⅱ AEG, which not only need close teamwork, but also require rich experience in laparoscopic surgery. The authors has started to choose these two totally minimally invasive surgical approaches, the feasibility and safety of which are proved. The key surgical details are presented in this article for reference.

Objective To observe the effect of varying intensities of water-jet force on autologous fat graft viability.Methods Lipoaspirate was taken from 12 female patients undergoing waterjet assisted abdominal liposuction at our department.According to the intensity of water-jet force,the experimental group was divided into four subgroups:R1 (pressure,30 bar),R2 (pressure,50 bar),R3 (pressure,70 bar) and R4 (pressure,90 bar).Hand-held suction was taken as the control group C.Adipose tissue was filtered with cotton cushion and centrifuged at low speed,and the composition ratio of water and fat tissue from each group was observed.Calcein-AM/Hoechst 33342 staining was used to detect the viability of adipocytes.Results Fat aspirates was divided into four layers:oil layer,pure fat tissue,liquid and bottom sediment.Oil ratios of R1,R2,R3,R4 and C were (8.9 ± 2.3) ％,(9.6±2.1)％,(10.3±1.3)％,(14.2±1.6)％ and (9.5±1.8)％,respectively.There was no statistically significant difference between R1,R2,R3 and C (P＞0.05).Statistically significant difference was found between R4 and other groups (P＜0.001).Viability of adipocytes from R1,R2,R3,R4 and C groups were (88.1±2.8)％,(89.9±1.9)％,(84.8±2.3)％,(78.0±1.7)％ and (91.1±2.9)％ respectively.There was no statistically significant difference between R1,R2 and C (P＞ 0.05).Statistically significant difference was found between R3,R4 and C (P ＜ 0.05).Conclusions Viability of fat graft harvested under lower intensity of water-jet force (R1,R2) is higher than that harvested under higher intensity of water-jet force (R3,R4).

Objective:To explore whether a longitudinal integrated clerkship (LIC) model is more conducive to medical students' post competency and satisfaction with clerkships compared with the traditional block rotation clerkship.Methods:We selected 72 students who participated in graduating clerkships at The First Affiliated Hospital of Harbin Medical University from June 2018 to June 2019. They were equally divided into experimental group and control group to adopt LIC and traditional block rotation clerkship models, respectively. After completing the clerkships, the two groups were evaluated for post competency through objective testing of theoretical medical knowledge and basic clinical skills and rating of the other five competence items by the students themselves and their teachers. At the same time, a questionnaire was delivered to both groups for the degree of satisfaction with clerkships. The t-test and chi-squared test were performed using SPSS 23.0. Results:The objective tests and students' self-evaluation showed that the experimental group had significantly higher scores of theoretical medical knowledge [(8.02±1.11) vs. (7.50±0.97)], basic clinical skills [(7.63±0.90) vs. (6.93±0.73)], medical professional responsibility [(7.74±0.56) vs. (7.31±0.78)], clinical communication [(8.10±1.06) vs. (7.22±0.60)], team work [(7.84±0.62) vs. (7.11±0.69)], literature searching [(6.25±0.60) vs. (4.78±0.84)], and scientific research ability [(4.26±0.88) vs. (2.46±1.20)] compared with the control group (all P<0.05). The experimental group had significantly higher teacher-rated scores of medical professional responsibility [(8.03±0.74) vs. (6.59±0.70)], clinical communication [(7.95±0.73) vs. (6.87±0.67)], team work [(7.96±0.75) vs. (6.95±0.69)], literature searching [(4.84±0.84) vs. (3.30±0.69)], and scientific research ability [(4.53±1.03) vs. (2.70±1.05)] than the control group (all P<0.01). The scores of satisfaction were all higher in the experimental group than in the control group in terms of course arrangement satisfaction [(7.17±0.91) vs. 6.56±0.84)], teacher-student interaction satisfaction [(7.08±0.69) vs. (6.28±0.82)], self-improvement satisfaction [(7.28±0.45) vs. (6.36±0.49)], and clinical work smoothness [(7.72±0.82) vs. (6.81±0.71); all P<0.01]. Conclusion:Compared with the traditional block rotation model, the LIC model is more helpful for improving the post competency of medical students. LIC is a new clinical clerkship model that can potentially replace the traditional block rotation clerkship.

Objective:To investigate the influences of different amounts of negative pressure on postoperative drainage volume for patients undergoing axillary endoscopic augmentation mammoplasty.Methods:According to the random number table, patients who were admitted to the Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology for augmentation mammoplasty between January 1st, 2018 and May 31st, 2019 were randomly grouped into high negative pressure group and low negative pressure group respectively. In the high negative pressure group, -90 kPa negative pressure was applied through a 600 ml negative pressure drainage bottle. In the low negative pressure group, -10 to -16 kPa negative pressure was applied through a 200 ml negative pressure drainage ball. Total drainage volume, drainage volume per day, drainage placement time, incidence and types of complications were recorded. Independent sample t-test or the rank-sum test for two independent samples was applied for comparison between groups. Results:A total of 56 patients who met the inclusion criteria were divided into high negative pressure group(age 28.2±4.1 years) and low negative pressure group(age 27.0±3.3 years). Patients’ BMI was (19.2±1.4) kg/m 2 in the high negative pressure group and (19.1±1.2) kg/m 2 in the low negative pressure group. Implant volume was (249.2±24.9) ml in the high negative pressure group and (257.5±23.8) ml in the low negative pressure group. There was no significant difference in baseline data between 2 groups ( P>0.05). There were significant differences in the daily drainage volume per breast (except for the third day), total drainage volume per breast and the duration of drainage placement between the two groups. The duration of drainage placement was 5.9±0.9 days in the high negative pressure group and 4.8±1.1 days in the low negative pressure group. Total drainage volume per breast was (336.4±86.7) ml in the high negative pressure group and (233.5±43.8) ml in the low negative pressure group. Patients were followed up for 12 months. No hematoma, seroma, inflammation or capsular contracture occurred in either group. One patient(3.6%) suffered breast implant displacement in the high negative pressure group and had revisional surgery. Conclusions:Lower negative pressure (-10 to -16 kPa) was associated with less drainage volume and shorter drainage placement time compared to higher negative pressure (-90 kPa) in patients undergoing axillary endoscopic augmentation mammoplasty.

Objective:To investigate the abdominal function and aesthetics outcomes of patients with abdominally based breast reconstruction.Methods:In this research, we retrospectively analyzed the cases of breast reconstruction in Union Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology from July 2013 to June 2018. In accordance with the inclusion and exclusion criteria, patients undergoing breast reconstruction by deep inferior epigastric perforator flap (DIEP) or muscle-sparing transverse rectus abdominis myocutaneous flap (TRAM) were included in the study. A questionnaire was designed to evaluate the patient’s abdominal strength, and the BREAST-Q breast reconstruction abdominal health module was used to assess the patient’s satisfaction degree with the abdomen. SPSS 21.0 statistical software was used to analyze the data. The independent-samples t test is used for comparison between the two groups; the matched-samples t test is used for the preoperative and postoperative comparison of a single group. P<0.05 indicates that the difference is statistically significant. Results:A total of 32 patients were enrolled, including 17 cases of DIEP breast reconstruction, aged 43.6±9.2 years old, and 15 cases of TRAM breast reconstruction, aged 41.0±10.1 years old. The postoperative follow-up period ranged from 12 to 73 months, with an average of 41.5 months. Preoperative abdominal wall strength scores in the DIEP group and the TRAM group were 4.71±0.47 and 4.60±0.50 , respectively, and there were on significant difference between two groups. Three months after operation, the abdominal wall strength of the DIEP group scored 2.65±0.86, which was higher than the score in the TRAM group(1.93±0.70) ( P<0.05). The scores of the two groups were significantly different from those before operation ( P<0.01). One year after the operation, the abdominal wall strength of DIEP group scored 4.65±0.49, which was significantly higher than the score in TRAM group (4.07±0.88)( P<0.05). There was no significant difference between the scores of DIEP group and those before operation ( P>0.05), however, the scores of TRAM group were significantly different from those before surgery ( P<0.05). One year after operation, the appearance of the abdomen was not significantly different between the preoperative and postoperative score in both two groups ( P>0.05). Preoperative abdominal satisfaction scores of the DIEP group and the TRAM group were 86.53±5.68 and 85.87±7.31, respectively, and there was no significant difference between two groups ( P>0.05). Three months after the operation, the abdominal satisfaction score of the DIEP group was 76.41±7.74, which was higher than the score in the TRAM group(68.00±9.08) ( P<0.01). The scores of the two groups were compared with those before surgery, and the differences were statistically significant ( P<0.01). One year after the operation, the abdominal satisfaction score was 85.00±5.32 in the DIEP group and 82.93±6.12 in the TRAM group, showing no statistical significance between two groups ( P>0.05). There was no significant difference between the scores of DIEP group and those before operation ( P>0.05), however, the scores of TRAM group were significantly different from those before surgery ( P<0.05). Conclusions:The study demonstrates that both two kinds of abdominal flaps can obtain a better abdominal appearance. The long-term abdominal function and abdominal satisfaction of patients undergoing breast reconstruction with DIEP flaps can return to the baseline levels, however, that of TRAM flaps can not return to the baseline levels. Further research is needed for the longer term results.

Objective:To investigate the abdominal function and aesthetics outcomes of patients with abdominally based breast reconstruction.Methods:In this research, we retrospectively analyzed the cases of breast reconstruction in Union Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology from July 2013 to June 2018. In accordance with the inclusion and exclusion criteria, patients undergoing breast reconstruction by deep inferior epigastric perforator flap (DIEP) or muscle-sparing transverse rectus abdominis myocutaneous flap (TRAM) were included in the study. A questionnaire was designed to evaluate the patient’s abdominal strength, and the BREAST-Q breast reconstruction abdominal health module was used to assess the patient’s satisfaction degree with the abdomen. SPSS 21.0 statistical software was used to analyze the data. The independent-samples t test is used for comparison between the two groups; the matched-samples t test is used for the preoperative and postoperative comparison of a single group. P<0.05 indicates that the difference is statistically significant. Results:A total of 32 patients were enrolled, including 17 cases of DIEP breast reconstruction, aged 43.6±9.2 years old, and 15 cases of TRAM breast reconstruction, aged 41.0±10.1 years old. The postoperative follow-up period ranged from 12 to 73 months, with an average of 41.5 months. Preoperative abdominal wall strength scores in the DIEP group and the TRAM group were 4.71±0.47 and 4.60±0.50 , respectively, and there were on significant difference between two groups. Three months after operation, the abdominal wall strength of the DIEP group scored 2.65±0.86, which was higher than the score in the TRAM group(1.93±0.70) ( P<0.05). The scores of the two groups were significantly different from those before operation ( P<0.01). One year after the operation, the abdominal wall strength of DIEP group scored 4.65±0.49, which was significantly higher than the score in TRAM group (4.07±0.88)( P<0.05). There was no significant difference between the scores of DIEP group and those before operation ( P>0.05), however, the scores of TRAM group were significantly different from those before surgery ( P<0.05). One year after operation, the appearance of the abdomen was not significantly different between the preoperative and postoperative score in both two groups ( P>0.05). Preoperative abdominal satisfaction scores of the DIEP group and the TRAM group were 86.53±5.68 and 85.87±7.31, respectively, and there was no significant difference between two groups ( P>0.05). Three months after the operation, the abdominal satisfaction score of the DIEP group was 76.41±7.74, which was higher than the score in the TRAM group(68.00±9.08) ( P<0.01). The scores of the two groups were compared with those before surgery, and the differences were statistically significant ( P<0.01). One year after the operation, the abdominal satisfaction score was 85.00±5.32 in the DIEP group and 82.93±6.12 in the TRAM group, showing no statistical significance between two groups ( P>0.05). There was no significant difference between the scores of DIEP group and those before operation ( P>0.05), however, the scores of TRAM group were significantly different from those before surgery ( P<0.05). Conclusions:The study demonstrates that both two kinds of abdominal flaps can obtain a better abdominal appearance. The long-term abdominal function and abdominal satisfaction of patients undergoing breast reconstruction with DIEP flaps can return to the baseline levels, however, that of TRAM flaps can not return to the baseline levels. Further research is needed for the longer term results.