Ambulatory electrocardiogram (ECG) monitoring can effectively reduce the risk and death rate of patients with cardiovascular diseases (CVDs). The Body Sensor Network (BSN) based ECG monitoring is a new and efficien method to protect the CVDs patients. To meet the challenges of miniaturization, low power and high signal quality of the node, we proposed a novel 50 mmX 50 mmX 10 mm, 30 g wireless ECG node, which includes the single-chip an alog front-end AD8232, ultra-low power microprocessor MSP430F1611 and Bluetooth module HM-11. The ECG signal quality is guaranteed by the on-line digital filtering. The difference threshold algorithm results in accuracy of R-wave detection and heart rate. Experiments were carried out to test the node and the results showed that the pro posed node reached the design target, and it has great potential in application of wireless ECG monitoring.
Algorithms ; Cardiovascular Diseases ; diagnosis ; Electrocardiography, Ambulatory ; instrumentation ; Equipment Design ; Heart Rate ; Humans ; Wireless Technology ; instrumentation

Objective To study the diagnosis and treatment of pancreatic cystadenoma and cystadenocarcinoma.Methods The clinical data of 21 surgically treated patients of the cystic neoplasms of pancreas(CNP),confirmed by pathology,in recent 8 years were retrospectively analyzed.Results CNP was more frequently seen in young to middle-aged women.Upper abdominal mass and abdominal distention and pain were the main clinical presentations.The CNP resection rate was 95%(100%and 80%in benign and malignant CNP respectively).Of the 21cases,pancreaticoduodenectomy and distal pancreatectomy were performed in 2 and 16 respectively;and middle segment pancreatectomy in 2 patients.Postoperative pancreatic fistula was the leading complication.Conclusion CNP have no clinical characteristics.Ultrasonography and CT could be helpful to the diagnosis of CNP.The resection of the whole tumor with part paratumor pancreas tissue is advocated.

Objective To evaluate the clinical presentation,pathologic features,diagnosis and treatment of hepatic angiomyohponm(HAML).Methods Retrospective analysis was made on 22 HAML cases in terms of clinical finding,images,pathologic examination and surgical treatment.Results Of the 22 patients,6 were male and 16 were female.The average age was 48.2 years.Seventeen patients had no clinical symptoms.None had the history of hepatitis virus infection.None of them was complicated with renal AML.None had tlle history of taking oral contraceptives in the sixteen female patients.Serum AFP、CEA、CA19-9、CA242 levels were all within normal limits.The correct diagnostic rate of BUS.CT and MRI was 2l%(4/19)、23.5%(4/17)and 25%(2/8),respectively.All tumorts were single nodule with a diameter of 4～17 cm,without complete capsula.All these 22 patients underwent tumor resection,including partial liver resection in 17 patients,left hemihepatectomy in 5.One patient died of postoperative complication,one patient suffered from temporary bile leak.The HMB45 positive rate by immunohistochemical method was 100%.Extramedullary hemopoiesis was found in 4 patients.Follow up of 6 months to 17 years in 91%(20/22)patients found no tumor recurrence. Conclusions HAML had no specifiC symptoms.The preoperative imaging diagnosis is difficult.Surgical resection is the therapy of choice for HAML.

Objective To evaluate the efficacy of T-joint endoscopy mask for fiberoptic bronchoscopy (FOB)-guided awake nasotracheal intubation in patients with cervical spinal cord injury.Methods Forty patients of both sexes aged 21-64 yr with fracture of cervical spine complicated by spinal cord injury scheduled for anterior decompression and interbody fusion under general anesthesia were randomly divided into 2 groups according to the technique for awake nasotracheal intubation (n =20 each):group nasal catheter and group T-joint endoscopy mask.Topical anesthesia of nasal cavity,pharynx,larynx and trachea with 2％ lidocaine was conducted and then remifentanil was continuously infused at 0.05-0.15 μg· kg-1 · min-1 in both groups.The incidence of hypoxemia and intubation time were recorded.Arterial blood samples were obtained for determination of PaO2 and PaCO2 before topical anesthesia (baseline),immediately before and 1 min after placement of FOB and immediately after nasotracheal intubation was accomplished.Results The incidence of hypoxemia was significantly lower in group Tjoint endoscopy mask (0) than in group nasal catheter (25％) (P ＜ 0.05).The PaO2 during nasotracheal intubation was significantly higher in group T-joint endoscopy mask than in group nasal catheter (P ＜ 0.05).There was no significant difference in PaCO2 and intubation time between the 2 groups (P ＞ 0.05).Conclusion T-joint endoscopy mask facilitates awake nasotracheal intubation without affecting oxygen inhalation in patients with cervical spinal cord injuries.

Objective To dynamically observe the developing process and characteristics of the chronic intra-hepatic hyperplastic nodule to small hepatoma with ultrasound,and to evaluate the value of ultrasound in the diagnosis of small hepatoma.Methods One hundred twenty-two chrome hepatitis cases with HBsAg(+),HBcAb(+)and HBeAg(+)were prospectively examined by two-dimensional ultrasound and three-dimensional reconstruction.Characteristics and diagnostic accuracy of two-dimensional ultrasound and three-dimensional reconstruction were compared with the results of hepatic biopsy.Results Thirty-four of 122 patients developed small hepatoma.The duration between hepatic fibrosis and liver cirrhosis was (6.30±2.31)years,and time of hepatoma changed from liver cirrhosis was (8.01±2.10) years.The intrahepatic hyperplastic nodule,shape of small hepatoma and relationship between tumor and ambient tissue were displayed clearly with three-dimensional ultrasound,and the number of detection with threedimensional ultrasound was much higher than that of two-dimensional ultrasound significantly.Conclusions Dynamic ultrasound examination of the echogenicity change of chronic hepatic lesion caused by HBV is useful for early detection of small intra-hepatic nodule,three-dimensional ultrasound reconstruction may enhance the accuracy in diagnosing small hepatoma.

Objective To evaluate the strategies and effect of surgical treatment for concomitant abdominal aortic aneurysm (AAA) and colorectal cancer (CRC). Methods Literatures on concomitant AAA and CRC published from January 1988 to December 2008 were retrieved from Pubmed, Sciencedirect, Ovid, CBMdisc, CNKI and et al, and correlated indexes were extracted for analysis. Differences among the groups were analyzed using the t test, chi-square test and fisher's exact test. Results A total of 367 cases of concomitant AAA and CRC treated by operation were retrieved. The length of operation delay of patients who received radical resection of CRC first was (115 ± 21 )days, which was significantly longer than (42 ± 8 )days of patients who received open abdominal aortic aneurysm repair (OAAR) first (t = 18. 9, P <0.05). The 30-day complication rate and accumulative length of hospital stay of patients who received one-stage radical resection of CRC + OAAR were 10.5% ( 12/114 )and (23 ±6) days, and 26.0% (47/181) and ( 16 ±4)days of patients who received two-stage radical resection of CRC + OAAR, with a significant difference ( χ2 = 10.42, t = 12. 01, P <0.05 ). The accumulative length of hospital stay of patients who received radical resection of CRC + endovascular aneurysm repair (EVAR) was (12 ±4) days, which was significantly shorter than that of patients who received radical resection of CRC + OAAR [ ( 19 ±5 ) days ] ( t = 9.48, P < 0. 05 ). The 4-year survival rate of patients who received two-stage radical resection of CRC + OAAR was 43.5% (27/62), which was significantly lower than that of patients who received two-stage radical resection of CRC + EVAR [69.2% (18/26) ] or one-stage radical resection of CRC + OAAR [73.7%(14/19) ] (χ2 =4.83, 5.28, P<0.05). Conclusions If the diameter of AAA is under 5 cm, radical resection of CRC should be firstly carried out; but if the diameter of AAA is above 5 cm, OAAR should be firstly carried out to prevent the rapture of tumors. One-stage surgery is better than two-stage surgery if patients could tolerate it.

OBJECTIVE:To provide the clinical departments with a reference for promoting rational drug use. METHODS:The inpatient prescriptions given by orthopaedics and burn departments from Jun. to Dec. 2013 were selected randomly. The number of the selected prescriptions by each department accounted for 2% of the total prescriptions given by the corresponding department in that month,including 4 921 cases by orthopaedics department and 1 391 cases by burn department. Statistical analysis of irrational prescriptions was made according to Chinese Pharmacopoeia,New Materia Medica,the package insert, and other relevant references. RESULTS:1 821 prescriptions given by orthopaedics department and 378 by burn department were found to be irrational,accounting for 37.00% and 27.17% respectively. The reasons of irrationality mainly included im-proper compatibility,improper route of administration,contraindication in and use with caution by the elderly and children,re-peated drug use,improper drug combination etc. CONCLUSIONS:The system of prescription review should be strengthened, and clinical staff training system and pharmaceatical knowledge information platform are established to promote rational use of drugs.

Objective To evaluate the efficacy of an airway topical anesthesia catheter for topical anesthesia using a spray-as-you-go technique via the fiberoptic bronchoscope (FOB).Methods Forty American Society of Anesthesiologists physical status Ⅰ-Ⅲ patients with obstructive sleep apnea syndrome,aged 20-64 yr,with body mass index of 23-35 kg/m2,with no upper respiratory tract infection within 1 week before operation,scheduled for elective uvulopalatopharyngoplasty,were divided into 2 groups (n =20 each) using a random number table:routine control group (group C) and FOB-airway topical anesthesia catheter group (group F).In group C,the pharynx and larynx were sprayed with lidocaine FOB by using a laryngo-tracheal mucosal atomization device,and cricothyroid membrane puncture was performed and then lidocaine was injected.In group F,airway topical anesthesia was performed using a spray-as-you-go technique via the FOB with an airway topical anesthesia catheter spraying lidocaine via the nose.At 5 min after topical anesthesia of the airway,FOB-guided intubation was performed,and dexmedetomidine was intravenously infused at 0.1 μg · kg-1 · min-1 for sedation in both groups.Ramsay sedation scores were assessed after topical anesthesia and before intubation.The scores for the intubating condition and tolerance of tracheal tube were assessed during FOB-guided intubation.Successful intubation and the development of responses to intubation and hypoxemia were recorded.The patients were followed up one day after the end of operation,and parents' satisfaction with the procedure of intubation was recorded.Results Compared with group C,the intubating condition score,tolerance of tracheal tube score,success rate of intubation at first attempt and rate of parents' satisfaction with the procedure of intubation were significantly increased,and the incidence of responses to intubation was decreased (P＜0.05),and no significant change was found in Ramsay sedation scores before intubation and incidence of hyoxemia in group F (P＞0.05).Conclusion When the FOB is used to guide awake nasotracheal intubation,the airway topical anesthesia catheter provides better efficacy,better intubating conditions,and fewer side effects when applied for topical anesthesia using a spray-as-you-go technique via the FOB,it can be easily accepted by the patients and the efficacy is better that of routine airway topical anesthesia.

Objective To construct F344 rat bone marrow mesenchymal stem cell line (MSC) modified with human hepatocyte growth factor (hHGF) gene.Methods Recombinant virus containing hHGF was obtained by transfecting the packaging cell line 293 FT with lentiviral vector pLV/EF1α-hHGF-IRES-eGFP.MSCs derived from F344 rat bone marrow were then tranfected with packed lentiviral vector.Purified MSCs expressing hHGF was obtained by screening culture with G418.MSCs and MSCs transfected with empty vector were used as control.The expression of hHGF protein was detected by Western blot (eGFP-MSCs).The hHGF-transfected MSCs were cultured in osteoblast-inducing culture medium and osteoblast phenotype was assayed by alizarin Red staining.The cells were also cultured in adipogenesis medium and stained with Oil Red O for identification.Results The expression of hHGF protein was significantly up-regulated in the hHGF-MSCs as compared with MSCs and eGFP-MSCs.hHGF-MSCs readily differentiated into mineralizing cells or adipocytes when incubated in differentiation medium.Conclusion A F344 rat MSC line that stably expresses HGF is successfully established.

Objective To investgate the changes in the expression of hepatocyte growth factor (HGF)and c-met in the lungs in a rat model of pulmonary hypertension.Methods Eighty 7 week old male SD rats weighing 180-250 g were randomly divided into 2 groups ( n =40 each ):control group (group C) and pulmonary hypertension group (group PH).Pulmonary hypertension was induced by left pneumonectomy and subcutaneous monocrotaline (MCT) 60 mg/kg 2 weeks later.Pulmonary artery pressure and the ratio between the weight of right ventricle and left ventricle + interventricular septum ( RV/LV + S) were measured at 7,14,21 and 28 d after MCT administration.HGF and c-met protein and mRNA expression and TGF-β content in the lung tissue were determined.Results Pulmonary hypertension and right ventricular hypertrophy associated with hypertrophy of pulmonary artery tunica media and muscularization of small pulmonary arteries developed after MCT administration in PH group.In PH group HGF protein and mRNA expression in the lungs was significantly down-regulated as compared with group C.There were no significant differences in c-met protein and mRNA expression in the lungs between the 2 groups.The TGF-β content in the lungs was significantly increased in group PH as compared with group C.Conclusion Decrease in HGF production in the lungs plays an important role in the pulmonary hypertension.Increasing of pulmonary TGF-β may play an important role in the down-regulation of pulmonary HGF expression during pulmonary hypertension.