Through various common domestic and foreign electronic sphygmomanometers to test blood pressure, we find that when measuring high blood pressure or low blood pressure, there is a mismatch between the maximum inflation pressure and the blood pressure measurement, which often results in repeatedly inflating and deflating as well as the problem of high inflation pressure. In order to solve these problems and find a suitable maximum inflation pressure, two intelligent pneumatic solutions based on identifying of pulse wave are suggested and 700 groups of blood pressure experiments are done, then the two solutions are verified by experiments. The experiment proved that these solutions proposed have good stability and accuracy, they can solve the problems appeared in measuring blood pressure effectively, at the same time, the second solution that estimate the maximum inflation pressure during inflation is considered as the best one.
Blood Pressure ; Blood Pressure Determination ; instrumentation ; Heart Rate ; Humans ; Hypertension ; Sphygmomanometers

Anesthesia plays an essential role in clinical operations. Guiding anesthesia by EEG signals is one of the most promising methods at present and it has obtained good results. The analysis and process of the EEG signals in anesthesia can provide clean signal for further research. This paper used variance threshold method to remove the mutation fast and large interfering signals; and used notch filter to remove frequency interference, smoothing filter to remove baseline drift and Butterworth low-pass filter to remove high frequency noise at the same time. In addition to this, the translation invariant wavelet method to remove interference noise on the signals which was after the classical filter and retained non-stationary characteristics was used to evaluate parameter calculation. By comparing the calculated parameters from treated signal using this paper's methods and untreated signal and standard signal, the standard deviation and correlation has been improved, particularly the major parameters BetaR, which provides better signal for integration of multi-parameter to evaluate depth of anesthesia index for the latter.
Anesthesia ; methods ; Humans ; Signal Processing, Computer-Assisted

Anesthesia plays an essential role in clinical operations. Guiding anesthesia by EEG signals is one of the most promising methods at present and it has obtained good results. The analysis and process of the EEG signals in anesthesia can provide clean signal for further research. This paper used variance threshold method to remove the mutation fast and large interfering signals; and used notch filter to remove frequency interference, smoothing filter to remove baseline drift and Butterworth low-pass filter to remove high frequency noise at the same time. In addition to this, the translation invariant wavelet method to remove interference noise on the signals which was after the classical filter and retained non-stationary characteristics was used to evaluate parameter calculation. By comparing the calculated parameters from treated signal using this paper’s methods and untreated signal and standard signal, the standard deviation and correlation has been improved, particularly the major parameters BetaR, which provides better signal for integration of multi-parameter to evaluate depth of anesthesia index for the latter.

Cardiac neural crest cells(CNCCs) are a special subgroup of neural crest cells that originate from the dorsal side of the ectodermal neural tube. During embryonic development, they are a pluripotent stem cell group that can migrate to the periphery and differentiate into many types of cells. They are essential for proper development of heart and outflow tract(OFT). Hypoplastic aortic arch(HAA) is a type of congenital heart malformation caused by abnormal development of the ventricular outflow tract in the embryonic period, and often combined with other cardiac malformations. It is a common and poor prognosis after birth in complex congenital heart disease, which seriously endangers children's health. There is a significant correlation between abnormal development of CNCCs and HAA. Although the influencing factors are still unclear, related experiments have screened out relevant genetic and environmental factors. Discussing the mechanism of its involvement in the development of cardiac outflow tract is helpful to understand the pathogenesis of HAA and promote the progress of treatment methods. This article reviews the genetic and environmental factors affecting the development of CNCCs and their correlation with HAA.

In December 2019, a cluster of patients with pneumonia of unknown cause were linked to a seafood wholesale market in Wuhan, China. Some studies found that the virus was a new kind of virus which had never been found in the human body. Then, the virus was named 2019 novel coronavirus (2019-nCoV) by the World Health Organization (WHO). 2019-nCoV nucleic acid detection is one of the essential indicators of COVID-19. Recently, some false-negative cases in China-Japan Friendship Hospital and Hangzhou Hospital led the clinical doctors to question the value of the nucleic acid detection. In this paper, more than 3 000 results of 2019-nCoV detection in Zhongnan Hospital, Wuhan University were analyzed. Attention should be paid to the root cause of false-negative results and the related countermeasures should be taken.

Objective:To investigate the feasibility and clinical value of MRI quantitative evaluation technique in detecting sternocleidomastoid muscle fibrosis in patients with nasopharyngeal carcinoma (NPC) after radiotherapy.Methods:From August 2019 to March 2021, 45 patients with clinically confirmed NPC after radiotherapy and 30 healthy controls who underwent physical examination in Lishui Hospital of Zhejiang University were enrolled in our study. According to the Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer (RTOG/EORTC) classification criteria of late radiation reactions respectively, the sternocleidomastoid muscle injury in the NPC group was divided into grade Ⅰ, Ⅱ and Ⅲ, which included 8, 32 and 5 patients respectively. All patients underwent T 1 mapping and T 2 mapping imaging of the neck. Firstly, the mapping images of sternocleidomastoid muscle between the two groups were analyzed and compared. Using NUMARIS/4 software of Siemens image post-processing workstation, the region of interest was manually drawn along the edge of sternocleidomastoid muscle at the level of laryngeal chamber in axial mapping diagram. Then, T 1 and T 2 values and the long and short diameters of sternocleidomastoid muscle were measured respectively. Finally, the differences of the parameters between the two groups were compared by independent sample t-test, Spearman rank correlation was used to analyze the relationship between the average T 1 and T 2 values of bilateral sternocleidomastoid muscles and the grade of late radiation injury. Results:Compared with the control group, the shape of sternocleidomastoid muscle in the NPC group was smaller in shape, with irregular edge and uneven increase of T 1 mapping color scale. There was no significant difference in muscle signal in T 2 mapping. The T 1 values of left and right sternocleidomastoid muscles in the NPC group were (1 524.7±97.6) and (1 496.5±93.2) ms respectively, which were significantly higher than those in the normal control group [(1 231.5±85.3) and (1 275.9±90.9) ms] ( P<0.05), and the T 2 values of left and right sternocleidomastoid muscles in the NPC group were (28.4±4.8) and (28.4±3.6) ms respectively, which were lower than those in the normal control group [(30.4±3.5) and (30.4±3.5) ms] ( P<0.05). The long and short diameters of bilateral sternocleidomastoid muscles in the NPC group were shorter than those in the control group ( P<0.05). The average T 1 and T 2 values of bilateral sternocleidomastoid muscles in NPC patients after radiotherapy were (1 510.6±95.4) and (28.4±4.2) ms respectively, The T 1 value was positively correlated with the classification of advanced radiation injury ( r=0.78, P<0.001), and T 2 value was negatively correlated with the level of advanced radiation injury ( r=-0.87, P<0.001). Conclusion:Mapping quantitative evaluation technique can noninvasively and objectively detect and evaluate sternocleidomastoid muscle fibrosis after NPC radiotherapy, which has potential clinical application value.

Through various common domestic and foreign electronic sphygmomanometers to test blood pressure, we find that when measuring high blood pressure or low blood pressure, there is a mismatch between the maximum inflation pressure and the blood pressure measurement, which often results in repeatedly inflating and deflating as well as the problem of high inflation pressure. In order to solve these problems and find a suitable maximum inflation pressure, two intel igent pneumatic solutions based on identifying of pulse wave are suggested and 700 groups of blood pressure experiments are done, then the two solutions are verified by experiments. The experiment proved that these solutions proposed have good stability and accuracy, they can solve the problems appeared in measuring blood pressure effectively, at the same time, the second solution that estimate the maximum inflation pressure during inflation is considered as the best one.

Objective To observe the application value of PET glucose metabolic imaging and MR structural imaging in diagnosis of Alzheimer disease (AD) and mild cognitive impairment (MCI).Methods Totally 18 patients with AD (AD group),6 patients with MCI (MCI group) and 10 healthy volunteers (HC group) were enrolled.There were 11 cases of moderate or severe AD and 7 cases of mild AD in AD group.PET and structural MR imaging of the brain were performed.The radioactivity distribution in the brain and the hippocampal atrophy were observed through visually evaluation and quantitative analysis.Results The glucose metabolism reduced in certain regions of the brain in all AD patients (18/18,100％).Among them,11 patients with moderate or severe AD accompanied hippocampal atrophy,while 3 of 7 patients with mild AD showed hippocampal atrophy.No hippocampal atrophy was found in 5 patients with MCI (5/6,83.33 ％),but 2 of them showed decreased radioactivity in the brain.The symmetric mild diminution of radioactivity distribution without hippocampal atrophy was found in all subjects in HC group (10/10,100％).Two cases in HC group showed mild encephalanalosis.Conclusion Both of PET glucose metabolic imaging and MR structural imaging can be used to diagnose AD or MCI with different focus.Combination of these two techniques is helpful to improving diagnostic accuracy.

Objective To explore the application and early efficacy of modified Veil nerve-sparing technique during laparoscopic radical prostatectomy(LRP).Methods Fifty-seven modified Veil nerve-sparing during LRP procedures were performed in patients with clinically localized prostate cancer between 2012 and 2016 by the same surgeon.Preoperative PSA level was 10.9 μg/ml,and Gleason score was 6.06(5-8).TNM clinical stage showed cT1 in 39 cases and cT2in 18 cases.All patients underwent transrectal ultrasonography before operation. Prostate volume was 40.2 (26- 99) ml. ECT bone scan excluded bone metastasis.MRI or CT examination showed no obvious prostate invasion and lymph node metastasis. The key technology was anatomical separation of detrusor apron, dorsal vascular complex (DVC) and the level between the prostate capsule, and a complete reservation was accomplished. Measurements: the rates and location of positive surgical margins (PSM) and tumor biochemical recurrence rate as well as functional outcomes were presented.Questionnaires were used to assess urine function and IIEF-5 score was used to estimate sexual function.Results Fifty-seven cases were followed up,and the average follow-up of 27.3(6-65)months.Five cases showed biochemical recurrence after 23 months.Five patients had a PSM(2 patients in apical margins,1 patient in left side,1 patient in right side and 1 patient in the bottom).At catheter removal,49 of 57 patients(86%)were dry(0 pads),and 8 of 57 patients(14%)needed one security pad.After 3 months and 6 months,42%(24 of 57 patients)and 60%(34 of 57 patients)presented an International Index of Erectile Function score>15(with or without phospho-diesterasetype-5inhibitors). Conclusions The modified Veil nerve-sparing technique during LRP can retain the fascia around the prostate more completely and restore postoperative urine and erectile function early.For selective cases, it will not increase the positive rate of surgical margins and biochemical recurrence rate.