objective To observe the differences between four- and single-channel recording of normal multifocal visual evoked potential (mfVEP). Methods mfVEP of 35 health individuals (70 eyes) were detected by both four- and single-channel recording with VERIS apparatus. The root mean square (RMS) value of reactive amplitude was obtained from the results of the two kinds of recording. Each stimulated patch was analyzed to compare the variational degree of each patch between the two recording methods. Responase sasymmetry coefficient (RAC) was introduced to evaluate the symmetry property between the two eyes in an individual. Results Compared with the single-channel recording,the responses of the stimulated patches of the four- channel recording were increased statistically, with most of the patches below the horizontal meridian and some of patches in the upper field, and there was distinct symmetry property between the two eyes in the same individual recorded by four-channel recording. Conclusion The four-channel recording is better than the single one and could be clinically applied and popularized.(Chin J Ocul Fundus Dis，2004，20：156-159)
Objective
To investigate the myocardial protective effects of Del Nido cardioplegia and analyze its advantages in adult cardiac surgery.
Methods
We retrospectively analyzed the clinical data of 96 adult patients undergoing cardiac valve surgery who received Del Nido cardioplegia (a DNC group) from June 2016 to January 2017 in our hospital. There were 44 males and 52 females with a mean age of 51.36±13.31 years. Meanwhile 96 patients who received conventional cardioplegia were recruited as a control group (a CTC group) and there were 53 males and 43 females with a mean age of 52.91±10.95 years. Cross-clamping time, cardiopulmonary bypass (CPB) time, total volume of and transfusion frequency of cardioplegia, the rate of spontaneous defibrillation, red blood cell transfusion and vasoactive-inotropic score at postoperative 24 hours (VIS 24) were recorded.
Results
No significant difference was found in age, body weight, ejection fraction, hematokrit, CPB time and cross-clamping time between the DNC group and CTC group. There was no significant difference in the rate of spontaneous defibrillation, VIS 24, cardiac enzymes and cardiactroponin I and length of ICU stay between the two groups. The total volume and transfusion frequency of cardioplegia, perioperative blood transfusion were lower in the DNC group. There was no new atrial fibrillation or in-hospital death in the two groups.
Conclusion
Del Nido is a good myocardial protection solution in adult cardiac valve surgery, and requires less static preload volume and reduceshemodilution and perioperative blood transfusion.
Abstract: Objective To investigate the clinical results of the coronary artery bypass grafting (CABG) for coronary artery disease (CAD) patients with completed hypothyroidism. Methods Twentyone CAD patients with hypothyroidism (hypothyroidism group) operated by a single surgeon from September 2002 to June 2009 in our department were enrolled in this study. Among them, there were 6 males and 15 females. Their average age was 60.4 years old. Three patients underwent CABG with onpump beating heart; one underwent CABG with onpump arrested heart; and 17 patients underwent CABG with offpump beating heart. All patients on thyroxine replacement therapy underwent CABG after free triiodothyronine（FT3）,free thyroxin（FT4）, thyroidstimulating hormone（TSH）, total triiodothyronine（TT3） and total thyroxin（TT4） were obviously improved. At the same time, twenty CAD patients without hypothyroidism were chosen as the control group (control group). Among them, there were 6 males and 14 females with an average age of 62.1 years old. The data of thyroid gland function and clinical prognostic indicator were observed after the operation. Results For the hypothyroidism group, one patient with pericardial effusion, heart failure and low thyroxine before surgery died during the onpump operation. Among the 20 survivors who had undergone CABG with beating heart, 17 were offpump CABG patients. Followup was done for 230 months. Postoperative eject factor of the survivors were significantly higher than their preoperative eject factor (55%±21% vs. 48%±17%). Twenty patients in the control group all survived. There was no significant difference in cardiac index ［2.7±1.4 L/(min·m2) vs. 2.8±1.5 L/(min·m2), t=0.530, P=0.530］, hospital stay (12.2±4.7 d vs. 10.1±3.9 d , t=0.170, P=0.170), or mechanical ventilation time (17.6±9.1 h vs. 15.1±13.7 h, t=0.120, P=0.120) between the hypothyroidism group and the control group. Perioperative thyroxine examination showed that there was no profound impact on thyroxine by offpump CABG. Conclusions With full preparation made before operation, CABG with beating heart is comparatively safe for CAD patients with hypothyroidism. The key of the treatment is perioperative thyroxine replacement therapy. There is much risk to perform onpump CABG on patients with severe hypothyroidism.
The automatic detection of arrhythmia is of great significance for the early prevention and diagnosis of cardiovascular diseases. Traditional arrhythmia diagnosis is limited by expert knowledge and complex algorithms, and lacks multi-dimensional feature representation capabilities, which is not suitable for wearable electrocardiogram (ECG) monitoring equipment. This study proposed a feature extraction method based on autoregressive moving average (ARMA) model fitting. Different types of heartbeats were used as model inputs, and the characteristic of fast and smooth signal was used to select the appropriate order for the arrhythmia signal to perform coefficient fitting, and complete the ECG feature extraction. The feature vectors were input to the support vector machine (SVM) classifier and K-nearest neighbor classifier (KNN) for automatic ECG classification. MIT-BIH arrhythmia database and MIT-BIH atrial fibrillation database were used to verify in the experiment. The experimental results showed that the feature engineering composed of the fitting coefficients of the ARMA model combined with the SVM classifier obtained a recall rate of 98.2% and a precision rate of 98.4%, and the F1 index was 98.3%. The algorithm has high performance, meets the needs of clinical diagnosis, and has low algorithm complexity. It can use low-power embedded processors for real-time calculations, and it’s suitable for real-time warning of wearable ECG monitoring equipment.
Objective To investigate the management during offpump coronary artery bypass grafting (OPCAB) for patients with ascending aorta atherosclerosis and to find appropriate treatment for minimizing the postoperative cerebrovascular accidents. Methods 236 patients with ascending aorta atherosclerosis were retrospectively analyzed underwent OPCAB in this hospital from Sep.2004 to Dec.2007, 4 of them received “No-touch” technique, 35 of them had the proximal anastomoses with the Enclose assistant, and 197 of them had the proximal anastomoses with the assistant of Heartstring. Hemodynamic indexes were consecutively monitored, blood streams of grafts was monitored by transit time flow measurement (TTFM) to evaluate the quality. Results Distal anastomoses 881，proximal anastomoses 267, the blood stream of 881 grafts was monitored, the mean flow was 16.2±18.7 ml/min, and the pulsatility index (PI) were 4.9±2.3, indicating the good quality of all grafts. The change of hemodynamic indexes including mean artery pressure (MAP, 78.1±10.4 mmHg vs. 80.9±8.1 mmHg）, pulmonary capillary wedge pressure (PCWP, 11.9±3.6 vs. 10.9±2.1 mmHg）, mean pulmonary artery pressure (MPAP, 17.3±4.3 mmHg vs. 15.3±2.8 mmHg）, cardiac output (CO, 4.2±1.2 L/min vs. 4.5±1.6 L/min）, center vinous pressure (CVP, 9.2±2.3cmH2O vs. 9.3±1.8 cmH2O）, heart rate (HR, 71.4±14.0 beats/min vs. 73.4±16.5 beats/min）, there were no statistically difference between before and after proximal anastomoses (Pgt;0.05). Two patients died of low cardio output during operation, 4 patients with transient ischemic attack were improved by 2 months medical therapy, and others had no postoperative complications as perioperative myocardial infarction etc, and the time of stay hospital was 10.5±4.2d. Followup 3-24 months for 185 patients, all living patients had no myocardial or cerebrovascular accidents, the symptoms were alleviated and myocardiac function improved. Conclusion Assessing the degree of the ascending aorta atherosclerosis sufficiently before and during the operation, choosing different operational strategy, and decreasing the manipulation of aorta can decrease the incidence of cerebrovascular accident and get better clinical result.
ObjectiveTo investigate the occurrence of indwelling urinary catheter in patients receiving thoracoscopic lobectomy and relevant risk factors.MethodsWe retrospectively reviewed the clinical data of the 737 patients who received thoracoscopic lobectomy in our hospital and analyzed the risk factors of indwelling urinary catheter during postoperative hospitalization using univariate analysis and multiple-variate logistic regression analysis between December 2018 and May 2019. There were 253 males and 484 females at median age of 57 (50, 64) years.ResultsA percentage of 14.4% (106/737) of the patients adopted postoperative indwelling urinary catheter. Univariate regression analysis showed that gender and postoperative bedridden time were risk factors for indwelling urinary catheter in the patients after thoracoscopic lobectomy (P<0.05). Multiple-variate logistic regression analysis showed that male gender (OR=2.018, 95% CI 1.316-3.096, P<0.001) and postoperative bedridden time >18 hours (OR=2.298, 95%CI 1.502-3.516, P<0.001) were the independent risk factors for indwelling urinary catheter.ConclusionMale gender and those with longer postoperative bedridden time are high-risk population to indwell urinary catheter. Positive measures should be taken to reduce the chance of indwelling urinary catheter.
ObjectiveTo determine the effects of the management mode participated by doctors, nurses and patients on the safety of medical tubes for restlessness patients in the Neurosurgery Intensive Care Unit (NICU). MethodsA total of 133 restlessness patients treated between May 17 and November 22, 2013 were included in the study as control group, who were admitted to the NICU before application of the management mode participated by doctors, nurses and patients; another 119 restlessness patients treated between May 17 and November 22, 2014 were included in the study as research group, who were admitted to the NICU after application of the management mode participated by doctors, nurses and patients. Then we compared the accidental extubation situation between the two groups. ResultsThe accidental extubation rate of all kinds of medical tubes in the research group was lower than that in the control group, among which the extubation rate of urethral catheter (0.67% vs. 4.32%), gastric tube (2.26% vs. 10.14%), trachea cannula (1.08% vs. 7.84%), and arterial cannulation pipeline (1.12% vs. 6.93%) was significantly different between the two groups (P<0.05). ConclusionThe management mode participated by doctors, nurses and patients can effectively reduce the accidental extubation rate of medical tubes for restlessness patients, prevent the occurrence of adverse events and ensure the treatment and nursing safety in the NICU.
