As one of the standard electrophysiological signals in the human body, the photoplethysmography contains detailed information about the blood microcirculation and has been commonly used in various medical scenarios, where the accurate detection of the pulse waveform and quantification of its morphological characteristics are essential steps. In this paper, a modular pulse wave preprocessing and analysis system is developed based on the principles of design patterns. The system designs each part of the preprocessing and analysis process as independent functional modules to be compatible and reusable. In addition, the detection process of the pulse waveform is improved, and a new waveform detection algorithm composed of screening-checking-deciding is proposed. It is verified that the algorithm has a practical design for each module, high accuracy of waveform recognition and high anti-interference capability. The modular pulse wave preprocessing and analysis software system developed in this paper can meet the individual preprocessing requirements for various pulse wave application studies under different platforms. The proposed novel algorithm with high accuracy also provides a new idea for the pulse wave analysis process.
High-density channels are often used to acquire electroencephalogram (EEG) spatial information in different cortical regions of the brain in brain-computer interface (BCI) systems. However, applying excessive channels is inconvenient for signal acquisition, and it may bring artifacts. To avoid these defects, the common spatial pattern (CSP) algorithm was used for channel selection and a selection criteria based on norm-2 is proposed in this paper. The channels with the highest M scores were selected for the purpose of using fewer channels to acquire similar rate with high density channels. The DatasetⅢa from BCI competition 2005 were used for comparing the classification accuracies of three motor imagery between whole channels and the selected channels with the present proposed method. The experimental results showed that the classification accuracies of three subjects using the 20 channels selected with the present method were all higher than the classification accuracies using all 60 channels, which convinced that our method could be more effective and useful.
Objective To study the application effect of Snyder hope theory combined with Satir model in the rehabilitation therapy of young and middle-aged patients with stroke. Methods A total of 224 young and middle-aged patients with stroke admitted to Zhongshan Hospital of Fudan University between August 2018 and August 2020 were divided into four groups (control group, Satir group, Snyder group, and combined group) according to the random number table method by taking admission time as sequence. All patients were given rehabilitation training on the basis of conventional treatment, and the Satir group was given group guidance of Satir model, the Snyder group was given hope therapy based on Snyder hope theory, and the combined group was given intervention combined Snyder hope theory with Satir model. All patients were continuously treated for six weeks. The scores of Herth Hope Index (HHI), Self-perceived Burden Scale (SPBS), exercise rehabilitation willingness questionnaire, Health Promoting Lifestyle Profile Ⅱ (HPLP Ⅱ), and Simplified Coping Style Questionnaire (SCSQ) were compared among the four groups before and after intervention. Results There were 53, 52, 54, and 52 patients enrolled in the control group, the Satir group, the Snyder group, and the combined group, respectively. The differences among the four groups in basic information such as sex, age, and type of stroke and the scores of the above scales before intervention were not statistically significant (P>0.05). After intervention, the total scores of HHI scale (27.65±6.34, 30.54±6.85, 32.79±7.12, 35.08±7.63), scores of exercise rehabilitation willingness (39.85±8.16, 40.52±7.93, 40.17±8.25, 43.81±7.46), total scores of HPLP Ⅱ scale (149.87±26.08, 159.32±26.73, 165.89±28.01, 173.18±28.54), and scores of positive coping style of SCSQ scale (19.65±5.08, 22.46±5.29, 25.04±4.91, 28.45±5.12) of the four groups significantly increased compared with those before intervention (P<0.05), while the total scores of SPBS scale (27.35±4.92, 23.74±5.02, 25.16±4.98, 21.49±5.27) and scores of negative coping style of SCSQ scale (4.83±1.25, 3.71±1.02, 3.94±1.08, 4.13±0.96) significantly decreased compared with those before intervention (P<0.05); the scores of HHI scale, exercise rehabilitation willingness, HPLP Ⅱ scale, and positive coping style of SCSQ scale of the combined group were higher than those of the other three groups (P<0.05), while the score of SPBS scale was lower than that of the other three groups (P<0.05). Conclusions Snyder hope theory combined with Satir model for rehabilitation therapy of young and middle-aged patients with stroke can help to improve the hope level, reduce the self-perceived burden, and improve the exercise rehabilitation willingness, health behaviors and coping styles. In addition, it is of great significance for promoting the rehabilitation of patients.
ObjectiveUse information technology to establish an “Internet+” chronic disease management model to provide patients with a full process, seamless, and convenient services. Explore a new model of “Internet+” chronic disease management and care services in the region. Methods Patients with chronic diseases treated in Mianyang Central Hospital from May 2018 to April 2019 were selected. The patients were randomly divided into intervention group and control group according to the single and even number at the end of hospitalization number. The control group adopted the traditional chronic disease management mode, and the intervention group adopted the “Internet+” chronic disease management mode based on the patients’ needs. And select the nursing experts who provide “Internet+” online nursing services. Compared with the effective management before and after the implementation of “Internet+” chronic disease management, the number of patients with chronic diseases, clinical outcome indicators, the number of health education readings, the number of Internet nursing services, and the sense of professional benefit of nurses and other indicators, etc. Results A total of 143 patients were included, including 78 in the control group and 65 in the intervention group. A total of 28 nursing experts were investigated. The effective management rate of patients with chronic diseases was 78.7%. The WeChat public account “Slow Disease Window” has read nearly 90 000 person-times, and the Internet Hospital “Nursing Professional Online” has nearly 2 000 online nursing services. After participating in “Internet+” chronic disease management, the disease activity and functional status of chronic disease patients were significantly improved (P<0.05). Nursing professionals have a strong sense of professional benefits (P<0.05). Conclusions With the development of “Internet+” chronic disease management, a new mode of chronic disease management was explored to promote the management of chronic disease more convenient and efficient, so that the health education work can be homogenized, the clinical outcome of the patients was effectively improved. At the same time the career planning of nursing staff can be broadened.
Objective To explore a new rotation training mode suitable for residency standardized non-professional radiological trainees in radiology department, so as to improve the training quality. Methods The residency standardized non-professional radiological trainees who rotated in the Department of Radiology, West China Hospital, Sichuan University between June 2021 and January 2022 were retrospectively included as the research objects. According to the training mode, they were divided into traditional training mode group and innovative training mode group. The training results of the two groups were compared by taking process assessment, final examination and final score as evaluation indicators. Results Finally, 122 residents were included, including 45 in the traditional training model group and 77 in the innovative training model group. There was no significant difference in gender, major, identity and grade between the two groups (P>0.05). There was no significant difference between the two groups in the first film reading skill examination and their usual homework performance (P>0.05). The score of the second film reading skill examination [15 (14, 16) vs. 12 (11, 13)], the score of the final examination [34 (31, 36) vs. 29 (25, 31)] and the final score [80 (76, 83) vs. 71 (67, 74)] in the innovative training mode group were better than those in the traditional training mode group (P<0.05). Conclusion The innovative training mode of online teaching platform combined with offline teaching can improve the training effect of residency standardized non-professional radiological trainees in radiology department.
Objective To analyze the equipment and the working model of Pakistan international medical rescue team in Wenchuan earthquake in order to provide the first hand references for our medical rescue. Methods We analyzed the aim, the staff composition, the medical equipment, the logistic material and the working model of the Pakistan international medical rescue team by working with the Pakistan team, and summarized its strengths and weaknesses. Result The main aim of the Pakistan international medical rescue team is to search, rescue and treat the wounded and sick in mass casualty incident. The team consisted of 28 staffs, including 2 leaders (the executive leader was an epidemic expert, and the vise leader was an administrative officer), 6 clinical doctors, 2 nurses, 3 medical technicians, 10 field search and rescue staffs and 5 logistics staffs. The medical equipment included a field ambulance, 7 field tents and 2 marine satellite phones. The medical equipment and instruments include an X-ray table, a B-ultrasound scanner, an ECG tester, a set of surgery operation equipment and 2 sets of ICU instruments. The main medicines included antibiotics, analgesics and for trauma treatment. Narcotic drugs and surgical supplies supported 200 patients; fluid infusion and drugs were enough for 500 patients; other laboratory reagents were enough for 500 patients; oral drugs, disinfection cotton and bandages were for 3 000 patients. Logistics materials contained a set of cooking appliances, 2 sets of toilet facilities and enough rice, flour and water for the whole team for two weeks. The field tent hospital was built in one day. In the field tent hospital, 1 256 patients were treated, 14 surgeries were performed, 236 X-ray and B-ultrasound examinations as well as 314 biochemical examinations were conducted within 10 days. Conclusion With complete disciplines and rational structure, the configuration of the Pakistan team is fitful for its aim, and it balances the function of search, rescue and public health. Apart from equipment and instruments enough for 300-500 patients rescue, the team also considers both its own survival and environmental protection. The outcome would be better if they could arrive at the spot in the first week after the earthquake happened.
Objective To determine the role of multimodal preoperative evaluation (MPE) system of transrectal ultrasound (TRUS), 64 multi-slice spiral computer tomography (MSCT) and serum amyloid A protein (SAA) in assessment of preoperative staging and selection of operative procedures of the lower and middle rectal cancer in multi-disciplinary team. Methods Prospectively enrolled 150 patients, who were diagnosed definitely as lower and middle rectal cancer (distance of tumor to the dentate line ≤10 cm) at West China Hospital of Sichuan University from November 2008 to March 2009, randomly assigned into two groups. In one group named MPE group, MPE consisting of TRUS, MSCT and SAA were made for the preoperative evaluation. In another group named MSCT+SAA group, both MSCT and SAA were made preoperatively. Then, the preoperative staging and predicted operative procedures were compared with postoperative pathologic staging and practical operative procedures, respectively. Furthermore, the pooled data were analyzed for the correlative relationship between the choice of surgery strategy and clinicopathological factors. Results According to the criteria, 146 patients with lower and middle rectal cancer were randomly assigned into MPE group (n=74) and MSCT+SAA group (n=72). The baselines characteristics of two groups were statistically identical. For MPE group the accuracy of preoperative staging T, N, M and TNM were 94.6% (70/74), 85.1% (63/74), 100% （74/74） and 82.4% (61/74), respectively; For MSCT+SAA group the corresponding rates were 77.8% (56/72), 84.7% (61/72), 100% （72/72） and 81.9% (59/72), respectively. The analysis showed a statistically difference in the accuracy of preoperative T staging between two groups (P=0.003) while there was no statistically significant difference of the accuracies of preoperative N, M and TNM staging between two groups (Pgt;0.05). There wasn’t a statistically significant increasing of the accuracy of prediction to operative procedures in MPE group compared with MSCT+SAA group 〔95.9% (71/74) vs.88.9% (64/72), P=0.106〕. When analyzing the relationship between multiple clinicopathologic factors and the operative procedures of lower and middle rectal cancer, there were statistical correlations between the pathological T staging (r=0.216， P=0.009), N staging (r=0.264， P=0.001), TNM staging (r=0.281， P=0.001), serum level of SAA before operation (r=0.252， P=0.002) or the distance of tumor to the dentate line (r=－0.261， P=0.001) and the operative procedures. Conclusion MPE system could display the accurate preoperative staging for lower and middle rectal cancer, on which the prediction of operative procedures can rest convincingly.
Objective To investigate the application effect of LEER (less pain, early move, early eat, and reassuring) mode in laparoscopic pancreaticoduodenectomy (LPD). Methods The clinical data of patients who underwent LPD in our hospital from March 2020 to March 2022 were retrospectively analyzed. Forty patients treated with the traditional mode during the perioperative period were classified as the traditional group, and 47 patients treated with the LEER mode were classified as the LEER group. The perioperative indicators, inflammatory stress indicators, immune indicators, nutritional indicators and postoperative complications were compared between the two groups. Results The visual analogue scale (VAS) score and hospitalization cost of the LEER group were lower than those of the traditional group (P<0.05). The postoperative ambulation time, anal exhaust/defecation time, drainage tube removal time, time to normal diet and hospital stay in the LEER group were shorter than those of the traditional group (P<0.05). Compared with preoperative, the WBC count and C-reactive protein (CRP) level of patients in the two groups increased after operation, but the changes of WBC count and CRP level in the LEER group were smaller than those in the traditional group (P<0.05). The IgA, IgM and IgG levels of patients in the two groups were not statistically different before and after operation (P>0.05), and the postoperative IgA, IgM and IgG of patients in the LEER group were higher than those in the traditional group (P<0.05). The change values of IgM and IgG in the LEER group were smaller than those of the traditional group (P<0.05), but there was no statistical difference in the change value of IgA between the two groups before and after operation (P>0.05). Compared with preoperative value, postoperative prealbumin (PA) and lymphocyte (LYM) levels in the two groups were decreased (P<0.05). The postoperative PA and LYM levels in the LEER group were higher than those in the traditional group (P<0.05). but the change value of PA before and after operation in the LEER group was smaller than that in the traditional group (P<0.05). There was no statistical difference in the change of LYM between the two groups before and after operation (P>0.05). The incidence of postoperative complications in the LEER group was 8.5% (4/47), and that in the traditional group was 35.0% (14/40). The incidence of postoperative complication in the LEER group was significantly lower than that in the traditional group (P=0.002). Conclusion Applying LEER mode in LPD can promote postoperative recovery of the patients, reduce postoperative stress response, improve nutritional status and protect immunity in the patients.
