This Paper brings forward a new technology of EEG Telemetry. Using two FDM channels, the signals can be transmitted through public telephone lines: the EEG signals are transmitted by TDM technology in one channel; the parametes are transmitted to the receiver for identification of data or synchronization in the other channel synchronously. This technology can satisfy almost any routine clinic needs, and also the quahty of transmission is nearly perfect: the distortion is little; distinct noise pollution and shift of base-line do not exist, which is valuable in medical application.

Objective:To investigate the clinical efficacy of bilateral route minimal- incision necrosectomy combined with continuous lavage for the treatment of infected necrotizing pancreatitis (INP).Methods:The retrospective and descriptive study was conducted. The clinical data of 20 patients with IPN who were admitted to Daping Hospital, Army Medical University from April 2016 to July 2019 were collected. There were 11 males and 9 females, aged (42±9)years. All the 20 patients underwent bilateral route minimal-incision necrosectomy, and then be continuous perfused and drainage within the purulent cavity postoperatively. Observation indicators: (1) surgical situations; (2) postoperative situations; (3) follow-up. Follow-up using outpatient examination and telephone interview was performed to detected patients fever, abdominal pain, abdominal distension, diarrhea, peripancreatic residual infection and survival up to January 2020. Measurement data with normal distribution were represented as Mean± SD, and measurement data with skewed distribution were represented as M (range). Count data were described as absolute numbers. Results:(1) Surgical situations: of the 20 patients who underwent surgery successfully, 14 patients underwent upper abdomen combined with left retroperitoneal approach, 1 patient underwent upper abdomen combined with right retroperitoneal approach, and the other 5 patients underwent upper abdomen combined with bilateral retroperitoneal approach. Fourteen of the 20 patients underwent additional surgery including 10 cases undergoing jejunostomy, 2 cases undergoing gastrostomy combined with jejunostomy, 1 case undergoing laparoscopic cholecystectomy combined with jejunostomy, and 1 case undergoing cholecystectomy. The operation time and volume of intraoperative blood loss of 20 patients were (228±41) minutes and 100 mL (range, 50-700 mL), respectively. (2) Postoperative situations: 20 patients began continuous perfused with 0.9% sodium chloride solution within the purulent cavity at postoperative day 2 (range, day 1-14). Six of the 20 patients had postoperative complications including 1 case with postoperative gastric fistula combined with intraperitoneal hemorrhage who underwent laparotomy hemostasis combined with gastrostomy at day 13 postoperatively, 1 case with postoperative duodenal fistula who underwent gastrointestinal anastomosis and jejunostomy at day 111 postoperatively, 1 case with postoperative retroperitoneal residual tissue necrosis and infection who underwent peripancreatic necrotic tissue debridement and drainage at day 11 postoperatively, 1 case with postoperative gallbladder fistula who underwent cholecystectomy at day 71 postoperatively, and 2 cases with postoperative pancreatic fistula who were cured with conservative treatment. The duration of hospital stay after 1st operation of the 20 patients were 42 days (range,20-178 days). (3) Follow-up: all 20 patients were followed up for 6.0 to 45.0 months, with a median follow-up time of 14.5 months. During the follow-up, 1 case developed secondary diabetes, and none of patient showed clinical manifestation such as fever, abdominal pain, abdominal distension and diarrhea. The peripancreatic residual tissue of all 20 patients absorbed well, and none of patient died.Conclusion:Bilateral route minimal-incision necrosectomy combined with continuous lavage is safe and feasible for the treatment of INP.

How to effectively remove the magnetic resonance imaging (MRI) artifacts in the electroencephalography (EEG) recordings, when EEG and functional magnetic resonance imaging (FMRI) are simultaneous recorded, is a challenge for integration of EEG and FMRI. According to the temporal-spatial difference between MRI artifacts and EEG, a new method based on sparse component decomposition in the mixed over-complete dictionary is proposed in this paper to remove MR artifacts. A mixed over-complete dictionary (MOD) of waveletes and discrete cosine which can exhibit the temporal-spatial discrepancy between MRI artificats and EEG is constructed first, and then the signals are separated by learning in this MOD with matching pursuit (MP) algorithm. The method is applied to the MRI artifacts corrupted EEG recordings and the decomposition result shows its validation.
Algorithms ; Artifacts ; Electroencephalography ; Evoked Potentials ; Magnetic Resonance Imaging ; Phantoms, Imaging ; Principal Component Analysis ; Signal Processing, Computer-Assisted

Objective:To investigate the relationship of mitochondrial DNA (mtDNA) copy number with clinicopathologic characteristics and its influence on the prognosis of hepatocellular carcinoma (HCC) patients.Methods:The retrospective case-control study was conducted. The clinicopathological data of 71 HCC patients undergoing surgical treatment in the Eastern Hepatobiliary Surgery Hospital of Naval Medical University from March to June 2011 were collected. There were 61 males and 10 females, aged from 26 to 80 years, with a median age of 55 years. The mtDNA copy number of tumor tissues and adjacent normal tissues were measured for all patients. Observation indicators: (1) the mtDNA copy number of tumor tissues and adjacent normal tissues and relationship between the mtDNA copy number and clinicopathological characteristics of HCC patients; (2) follow-up; (3) related factors for the prognosis of HCC patients. Follow-up using outpatient examination or telephone interview was conducted to detect postoperative survival of patients up to September 2019. Measurement data with normal distribution were described as Mean± SD, and comparison between groups was analyzed using independent samples t test or the matched samples t test. Measurement data with skewed distribution were described as M(range). Count data were represented as absolute numbers, and comparison between groups was analyzed using the chi-square test or Fisher exact probability. Univariate and multivariate analyses were conducted using the COX regressional model. Variables with P<0.10 in the univariate analysis were included for the multivariate analysis. Survival rates were calculated using the Kaplan-Meier method, and Log-rank test was used for survival analysis. Results:(1) The mtDNA copy number of tumor tissues and adjacent normal tissues and relationship between the mtDNA copy number and clinicopathological characteristics of HCC patients: of 71 HCC patients, the mtDNA copy number was 0.85±0.08 in tumor tissues, versus 1.16±0.08 in adjacent normal tissues, showing a significant difference between them ( t=2.96, P<0.05). Of 71 HCC patients, 48 cases were mtDNA-low and 23 cases were mtDNA-high. Cases with tumor capsule as integrity or not-integrity, cases with or without microvascular (MVI) in mtDNA-low and mtDNA-high patients were 20, 28, 21, 27 and 16, 7, 4, 19, respectively, showing significant differences ( χ2=4.84, 4.74, P<0.05). (2) Follow-up: 71 patients were followed up for 2.1 to 85.3 months, with a median follow-up time of 47.8 months. The 1-, 3-, 5-year overall survival rates of 71 HCC patients were 87.3%, 64.7, 37.4%, respectively. Moreover, the 1-, 3-, 5-year overall survival rates were 81.2%, 50.0%, 29.2% of the mtDNA-low patients, versus 95.7%, 86.5%, 54.7% of the mtDNA-high patients, showing a significant difference between the two groups ( χ2=5.86, P<0.05). (3) Related factors for the prognosis of HCC patients. Results of univariate analysis showed that the number of tumor, portal vein tumor thrombus, MVI, Barcelona Clinic Liver Cancer stage, mtDNA copy number were related factors for the prognosis of HCC patients ( hazard ratios=2.211, 2.911, 3.899, 3.587, 0.440, 95% confidence intervals as 1.024?4.777, 1.485?5.704, 2.115?7.186, 1.615?7.966, 0.223?0.871, P<0.05). Results of multivariate analysis showed that MVI and mtDNA copy number were independent influencing factors for the prognosis of HCC patients ( hazard ratios=2.754, 0.437, 95% confidence intervals as 1.374?5.521, 0.205?0.932, P<0.05). Conclusions:The mtDNA copy number of HCC patients is related with tumor capsule and MVI. The mtDNA copy number and MVI are independent influencing factors for the prognosis of HCC patients.