Objective To evaluate the effect of controlled hypotension with nitroglycerin and esmolol in the operation of endoscopic nasal surgery.Methods 60 patients undergoing selective endoscopic nasal surgery were randomly divided into three groups averagely: control group (groupⅠ), controlled hypotension with nitroglycerin group(group Ⅱ), controlled hypotension with nitroglycerin and esmolol group (groupⅢ). Every group has 20 patients.Mean artery pressure (MAP), HR, scores of surgical field quality(SSFQ) were recorded before anaesthesia and 10,20,30,40 minutes after anaesthesia. After the operation, bleeding capacity, operation time and dosage of nitroglycerin were recorded too.Results The bleeding capacity and operation time in groupⅡ and Ⅲ was significantly less than that in groupⅠ(P

Objective Ultra-wideband (UWB) microwave imaging is one of the promising alternatives for breast tumor detection, which can provide the desired high resolution and high sensitivity. Methods For UWB microwave early breast tumor detection, a UWB antenna with small size and compact structure is generally desired. To meet the demands of UWB microwave imaging and detection, a novel compact UWB probe is developed and tested. The probe is a combination of an exponentially-flared TEM horn and a pyramidal back-cavity, where the pyramidal back-cavity is employed to block back and side radiation. To increase the operation bandwidth, a low-frequency compensation loop loaded with resistors and a dielectric material block at the throat of TEM horn are added to the probe. Results The compact probe is fabricated and tested by vector network analyzer E8362B, and the results demonstrate an operation frequency band ranging from 1.36GHz to 20GHz for return loss under -10dB. Conclusion The probe can meet the needs of UWB microwave imaging for the early breast tumor detection.

Objective To investigate the risk factors for the prognosis of radical resection in elderly patients with colorectal cancer.Methods A total of 416 patients with colorectal cancer aged over 65 years were analyzed retrospectively,who came from Peking University First Hospital and Beijing Hospital from July 2008 to July 2011.Survival analysis was conducted by Kaplan-Meier and the survival rate was compared by Log-rank method.Multivariate analysis was conducted to analyze the prognostic factors by Cox regression.Results In this group of patients,the age was(74.3 ±5.4)years,and the post operative 5-year survival rate were 84.5％,77.3％,48.2％ respectively for staging Ⅰ,Ⅱ,Ⅲ patients.Univariate analysis showed that age,ASA score,co morbidity,preoperative hypohemia,preoperative hypoalbuminemia,postoperative complications,elevated preoperative carcinoembryonic antigen (CEA),intraoperative blood loss,perioperative blood transfusion,vascular cancer embolus,nerve invasion,depth of invasion,lymph node metastasis,tumor TNM stage and adjuvant therapy were correlated with the prognosis.Multivariate analysis showed that age ≥75 years,co morbidity,postoperative complications,preoperative albumin＜30 g/ L,depth of invasion,and lymph node metastasis,tumor TNM stage and adjuvant therapy were the independent risk factors for prognosis.Conclusions The risk factors for prognosis after radical resection in elderly patients with colorectal cancer include age≥75 years,co-morbidity,postoperative complications,preoperative albumin ＜30 g/L,depth of invasion,and lymph node metastasis,tumor TNM stage and adjuvant therapy.

Objective To explore the influence of type 2 diabetes mellitus combined with subclinical hypothyroidism on diabetic vascular complications.Methods One hundred and two patients with type 2 diabetes mellitus were selected.The serum free triiodothyronine (FT3),free thyroxine (FT4),thyroid stimulating hormone (TSH),anti-thyroid peroxidase antibody (TPO-Ab),thyroglobulin antibody (TG-Ab) levels were measured by chemiluminescence method.The patients were divided into type 2 diabctes mellitus combined with subclinical hypothyroidism group (47 cases) and type 2 diabetes mellitus with normal thyroid function group (55 cases) according to the thyroid function.The glycated hemoglobin (HbA1c),total cholesterol (TC),low-density lipoprotein cholesterol (LDL-C),triacylglycerol (TG),high-density lipoprotein cholesterol (HDL-C),urea nitrogen,creatinine and albumin levels were measured.The estimated glomerular filtration rate (eGFR) was calculated according to the formula of modification of diet in renal disease (MDRD).The presence of diabetic retinopathy was examined by fundus examination,and the presence of lower limb artery lesions was measured by vascular ultrasound.All indicators were compared between 2 groups.Results There were no statistical differences in age,disease course,HbA1c,body mass index (BMI),TC,TG,HDL-C,LDL-C,incidence of lower limb artery lesions and incidence of diabetic retinopathy between 2 groups (P＞ 0.05).TheeGRF in type 2 diabetes mellitus combined with subclinical hypothyroidism group was significantly lower than that in type 2 diabetes mellitus with normal thyroid function group:(83.74 ± 21.55) ml/(min· 1.73 m2) vs.(115.02 ± 12.29) ml/(min· 1.73 m2),and there was statistical difference (t =4.274,P ＜ 0.01).The incidence of diabetic nephropathy in type 2 diabetes mellitus combined with subclinical hypothyroidism group was significanlty higher than that in type 2 diabetes mellitus with normal thyroid function group:48.9％ (23/47) vs.23.6％(13/55),and there was statistical difference (x2 =7.103,P＜ 0.01).Logistic regression analysis showed that subclinical hypothyroidism was a risk factor for diabetic nephropathy (OR =0.524,95％ CI 0.12-0.93,P ＜ 0.05),but it was not the risk factor for diabetic retinopathy (OR =0.618,95％ CI0.19-2.16,P =0.475) and lower limb artery lesions (OR =0.485,95％ CI 0.32-2.13,P =0.689).Conclusion Subclinical hypothyroidism in patients with type 2 diabetes mellitus has no obvious effect on lower limb arterial complications and diabetic retinopathy,but may increase the risk of diabetic nephropathy.

Objective In order to increase the operation coverage of high-frequency (HF) RFID reader without increasing the power output, a novel RFID antenna for multi-drawer intelligent medicine-chest are proposed. Using this antenna, the RFID tags on medicine can be read effectively. Methods Several small antenna coils can be combined in series or parallel connection to make a more efficient RFID reader antenna. The use of small coil will be helpful to eliminate the blind spot of RFID reader with large coil antenna. Results The medicine-chest's size is 58 cm?50 cm?62 cm3, which includes two or three layers. We design four combined small antenna coils to cover the drawer. The test result shows that the antenna read region is about 54 cm?48 cm?30 cm, all RFID tags in the medicine-chest drawer bottom and most RFID tags in the drawer top can be read. Conclusion The multi-drawer coil antenna designed can effectively recognize the RFID tags in medicine-chest. It has a wide application prospect.

Objective To provide information collection,processing and inquiry system,which is safe,accurate rapid and in real time,for combat readiness medical supplies.Methods RFID technology and series antenna coils separated in space were used in combat readiness medicine-chest,thus enabling the medicine-chest to have the virtue of intelligence.Results The combat readiness medicine-chest equipped with RFID system can automatically classify to count and manage medical supplies in medicine-chest without opening the chest.The medical supplies can be monitored in real time and the information of outdated medicine can be automatically prompted.Conclusion Intelligent medicine-chest based on RFID technology can provide informatized method and technique for the management of combat readiness medical supplies for PLA.

Objective To identify the location of medicines in combat readiness medicine cabinet.Methods RFID system was used in combination with series antennas separated in space in combat readiness medicine cabinet.Results The combat readiness medicine cabinet equipped with RFID system could identify the location of medicines in medicine cabinet.It realized the location management and automatic classification statistics for medicines without opening cabinet.It greatly shortened the time in taking medicine in field emergency care.Conclusion Intelligent medicine cabinet based on RFID technology can upgrade the modernization level of sanitation logistics and provide a modern management method for iatrical material of combat readiness of PLA.

Hazardous Substances ; adverse effects ; Humans ; Occupational Exposure ; Workplace

Background and purpose:Radiotherapy and endocrine therapy are both important parts of adjuvant therapy for breast cancer, yet few studies have been conducted focusing on the interaction between radiation and endocrine therapy. Up to now, no conclusion has been drawn on the timing sequence of adjuvant radiation and endocrine therapy, which is indeed crucial in clinical practice. This study intended primarily to investigate the effect of concurrent or sequential exemestane combined with radiation on radiosensitivity of MCF-7 cells and its possible mechanism,and further to provide rationale for optimal clinical treatment modality.Methods:MCF-7 cells were arranged into three trial groups: the radiation group, exemestane sequenced with radiation group and exemestane followed radiation group. Radiosensitivity was evaluated by clonogenic assay, cell proliferation was measured by MTT assay, the ability to induce cell apoptosis was evaluated by DAPI staining assay, the changes of Bcl-2 and Bax were detected by Western blot.Results:Sensitive enhancement ratios (SER) were 1.51 and 1.37 in the exemestane sequenced with radiation group and exemestane followed radiation group, respectively. Compared with the radiation group, the percentage of cellular proliferation inhibition and apoptosis increased obviously in the exemestane sequenced with radiation group and exemestane followed radiation group. Exemestane combined with radiation made the Bax protein increase obviously and the Bcl-2 protein lowered significantly.Conclusion:Exemestane can enhance the radiosensitivity of MCF-7 cells, whose mechanism might be relevant to the promotion of cellular apoptosis. However,the treatment sequence does not affect the outcome.

Objective To explore the clinical value of urethral dilation in treatment of female bladder outlet obstruction. Methods Thirty-five female bladder outlet obstruction patients were selected, and all the patients failed for more than 1 month inαreceptor blocker treatment. The patients underwent urethral dilation under local anaesthesia, once a week, for a total of 12 times. The international prostate symptom score (IPSS), quality of life score (QOL) and residual urine volume before and after treatment were examined. Results The IPSS, QOL and residual urine volume after treatment were significantly lower than those before treatment: (10.23 ± 6.31) scores vs. (21.41 ± 3.71) scores, (2.31 ± 0.65) scores vs. (5.43 ± 0.60) scores and (20.73 ± 10.59) ml vs. (85.23 ± 12.15) ml, and there were statistical differences (P<0.01). Conclusions The urethral dilation is one of the effective treatments for female bladder outlet obstruction patients who fail in αreceptor blocker treatment. It can make a part of patients avoid invasive examination and surgery, and it is worth to be popularized in clinic and primary hospital.