Low-power dual-band on-body antenna for wireless body sensor networks

In Wireless Body Area Network (WBAN), the implanted biosensor collects various physiological data and wirelessly transmits the information to external medical devices in real time. The antenna design for this application faces great challenges as the microwavepropagation medium is not the free space as the human tissues constitute part of the transmission channel. The effects of the human body should be taken into consideration during the antennadesign.The present thesis aims to arrive at the optimum design of the on-body antenna to operate as a central antenna for WBAN. Five types of helical antennas are proposed in the present thesishaving a dual-frequency operation at 2.45 GHz and 5.8 GHz. The proposed antennas are optimized to maximize the Signal-to-Noise-Ratio (SNR) and, hence, to minimize the BER and the Specific Absorption Rate (SAR) in the human tissues. In this thesis, a semi-analytic rigorous technique for the assessment of microwave propagation on the medium equivalent to the human body is developed and the radiated fields from the proposed on-body antennas in the near zone are evaluated.The commercially available CST® simulator is used and experimental measurements are done for the five fabricated prototypes. The near-field distribution over the surface of humanbody is evaluated at 2.45 GHz using a Matlab® program, while the far-field radiation patterns obtained by experimental measurements showing good agreement with those obtained by the CST® simulator. It is shown that the radiation patterns produced by the more compact antennas; the conical-helix monopole and the monopole-spiral antennas show better performance and moreappropriate for the intended application.It is clear from the obtained results that the conical-helix/monopole and the monopole-spiral antennas have the highest performance. These antennas are shown to achieve the minimum BERof 5.3 × 10-5 and 6× 10-8 for both antennas respectively. In addition, the minimum average of the SAR that does not exceed 0.3 W/Kg in the human tissues while consuming the minimum valueof the input power when compared with the other antenna types

F-18 fluorodeoxyglucose positron emission tomography and/or computed tomography findings of an unusual breast lymphoma case and concurrent cervical cancer: a case report

<p>Abstract</p> <p>Introduction</p> <p>Breast lymphoma accounts for less than 1% of all non-Hodgkin's lymphomas and approximately 0.1% of all breast neoplasms. Most breast lymphomas are classified as diffuse large B-cell lymphomas or as mucosa associated lymphoid tissue lymphomas. Concurrent cases of breast lymphoma and cervical cancer are extremely rare.</p> <p>Case presentation</p> <p>We report a case of a 46-year-old woman of unknown ethnic origin diagnosed with concurrent diffuse large B-cell lymphoma of the breast and squamous cell cancer of the cervix that was detected and followed with F-18 fluorodeoxyglucose (FDG) positron emission tomography and/or computed tomography (PET/CT). The metastatic pattern of this case of breast lymphoma is similar to that of a typical metastatic breast carcinoma. These findings have never been described in the literature. PET/CT also demonstrated an incidentally intense FDG focus in the uterine cervix ultimately leading to the pathologic diagnosis of squamous cell carcinoma of the uterine cervix. An appropriate staging of breast lymphoma and cervical cancer with FDG PET/CT is important because of therapeutic consequence. This case report and review of the literature highlights the role of FDG PET/CT in staging and restaging of both breast lymphoma and cervical cancer.</p> <p>Conclusions</p> <p>We report a case of a breast lymphoma with a metastatic pattern similar to that of typical metastatic breast carcinoma. The FDG PET/CT scan also diagnosed a rare case of concurrent breast lymphoma and cervical cancer. This concurrence has not been reported previously in the medical literature.</p

Perceived Relationship Between Horizontal Violence and Patient Safety Culture Among Nurses

Huda Jalal Jaber,1 Ghada Mohammad Abu Shosha,1 Mahmoud Taher Al-Kalaldeh,2 Islam Ali Oweidat,1 Khalid Al-Mugheed,3 Samira Ahmed Alsenany,4 Sally Mohammed Farghaly Abdelaliem5 1Faculty of Nursing, Zarqa University, Zarqa, Jordan; 2Faculty of Nursing, the University of Jordan, Aqaba, Jordan; 3Faculty of Nursing, Riyadh Elm University, Riyadh, Saudi Arabia; 4Department of Community Health Nursing, College of Nursing, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia; 5Department of Nursing Management and Education, College of Nursing, Princess Nourah bint Abdulrahman University, Riyadh, Saudi ArabiaCorrespondence: Islam Ali Oweidat, Faculty of Nursing, Zarqa University, P.O. Box 132222, Zarqa, 13132, Jordan, Email [email protected]: Despite the value of undertaking patient safety culture, its association with horizontal violence in nursing workplace is still understudied. This study aimed to investigate the association between the perceived patient safety culture and its relationship with horizontal violence among nurses working in Jordan.Methods: A cross-sectional correlational design was used. Nurses working in major governmental hospitals in Jordan were conveniently recruited to complete an online self-administered questionnaire, which included the following tools: Hospital Survey on Patient Safety Culture and Negative Behaviours in Healthcare (NBHC) Survey. The survey was designed to measure attitudes and perceptions on patient safety culture at multiple levels of a healthcare organization with ten dimensions. The Negative Behaviours in Healthcare (NBHC) survey was developed as an adaptation of the Lateral Violence in Nursing Survey (LVNS) with 25 items and two open-ended questions.Results: A total of 330 nurses responded to the questionnaire. Nurses moderately perceived patient safety culture (HSOPS mean = 3.5, SD = 1.1). Low incidence of horizontal violence was claimed (mean = 2.1, SD = 1.1). However, it was associated with moderate negative correlation with patient safety culture (r = − 0.53, p < 0.001). Regression model revealed that patient safety culture explained an additional 53% of the variance of horizontal violence after controlling the effects of age and length of clinical experience (R-square change: 0.560, SE: 19.7, P: 0.001, CI: 1.21– 1.57).Conclusion: Despite its low incidence, patient safety culture was found influential to the horizontal violence based on the perspectives of nurses in Jordan. Patient safety culture can be incorporated with other factors that contribute to the development of horizontal violence in nursing workplace.Keywords: patient safety culture, hospital, horizontal violence, nurses, safet