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Search Results: 1 - 10 of 326152 matches for " S. Brett "
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Rate of Recurrence of Non-Small Cell Lung Cancer in Patients Treated with Percutaneous Ablation  [PDF]
Narottam S. Regmi, Brett L. Heber, James W. Klena
Advances in Lung Cancer (ALC) , 2014, DOI: 10.4236/alc.2014.34011
Abstract:

Background: Percutaneous ablation therapy as a treatment for non-small cell lung cancer (NSCLC) has been increasingly utilized. There is little data on long term efficacy. Because of this we reviewed the rate of recurrence of all ablation procedures done at our institution for the last 6 years. Methods: A total of 36 patients underwent 43 percutaneous procedures from July 2008 until January 2014 at our institution. There were 9 patients treated with radiofrequency ablation (RFA) and 27 treated withmicrowave ablation (MWA) for Stage I NSCLC. Each patient was reviewed to determine if there was a recurrence, the time to recurrence and the characteristics of the original cancer possibly predisposing the procedure to failure. Results: There were 8 recurrences in 9 patients undergoing RFA occurring at a median time of 842 days (range 425 - 1568) after their procedure. MWA was utilized in 27 patients for 34 procedures with 11 patients experiencing recurrences at a median time of 487 days (range 168 - 845). The median follow up time for the RFA patients was 1631 days (4.46 years) and for the MWA patients 751 days (2.06 years). Of the RFA recurrences, 5 involved systemic spread of their cancer and 3 were limited to site recurrences only. Of the MWA recurrences, 5 involved systemic spread of their cancer, 2 had chest wall recurrences and 4 were limited to site recurrences only.

What Happens after the Puerperium? Analysis of “Late” Postpartum Readmissions in California  [PDF]
Brett C. Young, Erin Madden, Allison S. Bryant
Open Journal of Obstetrics and Gynecology (OJOG) , 2015, DOI: 10.4236/ojog.2015.53016
Abstract:

Objective: Admissions to acute care hospitals represent a significant portion of healthcare utilization. Little is known regarding hospitalization in the first postpartum year beyond the traditional 6 weeks of the puerperium. We sought to investigate whether there are identifiable risk factors for hospital readmission during this time period. Study Design: We conducted a retrospective population-based study using all California birth records between 1999 and 2003. These records were linked with hospital discharge data for all admissions to California hospitals in the first 365 days after delivery. For women with a first birth during the study period, we assessed the likelihood of readmission to an acute care hospital between 42 and 365 days post-delivery. Univariate and multivariable logistic regression were used to determine risk factors for these “late postpartum” admissions. Results: Of 951,570 maternal birth admissions during the time period, 15,727 (1.7%) women were admitted in the late postpartum period. Women with an early postpartum readmission, antepartum admission, extremes of maternal age, black race, diabetes, hypertension, early preterm delivery and cesarean delivery had higher rates of late postpartum readmission. Of women with an antepartum admission for gestational diabetes or pre-existing diabetes, 6.6% and 18.5% of these women experienced a late postpartum admission for a diabetes-related diagnosis. Conclusion: Hospital readmission rates in the first year postpartum, remote from delivery, are significant. Women are at a higher risk of requiring hospital admission in the first year postpartum with select demographics and pregnancy-related diagnoses.

Effect of Skin Pigmentation on Near Infrared Spectroscopy  [PDF]
Luke Couch, Mellisa Roskosky, Brett A. Freedman, Michael S. Shuler
American Journal of Analytical Chemistry (AJAC) , 2015, DOI: 10.4236/ajac.2015.612086
Abstract: The purpose of this study was to determine the effects of skin pigmentation regarding Near Infrared Spectroscopy (NIRS) tissue oxygen saturation values (StO2). The study examined NIRS values in individuals with varying skin pigmentation on the anterior compartment of the lower leg and volar forearm to determine if correlation exists among three NIRS devices, the EQUANOX, Casmed, and INVOS. Skin pigmentation was measured on the anterior lower leg (AL) and volar forearm (VF) of participants using a noninvasive colorimeter that employed reflective spectroscopy to produce a quantitative value for erythema (skin “redness”) and melanin (skin pigment). Muscle oxygenation was measured using three oximetry devices with sensors placed in the same areas. The EQUANOX device showed no significant correlation with skin pigmentation, while the Casmed and INVOS devices showed moderate and significant correlation with skin pigmentation, respectively. Different devices have different abilities to remove confounding variables, such as skin pigmentation and erythema, which may affect clinical decision-making, and affect the use of NIRS technology.
Patient Satisfaction after Upper Extremity Laser Lipolysis without Suction
Brett S. Kotlus,Charles Mok
Plastic Surgery International , 2011, DOI: 10.1155/2011/352451
Abstract: Background and Objective. There has been a heightened interest in laser-assisted fat reduction procedures. We aimed to determine if lipolysis with the 1,320?nm Nd-YAG short-pulsed laser without subsequent suction results in satisfactory contouring of the upper extremity. Materials and Methods. Unilateral laser lipolysis of the upper arm was performed on 5 patients. Subcutaneous, subdermal, and skin surface temperatures were monitored with flexible thermocouples throughout the procedure to aid in the establishment of a treatment endpoint. Photographs and arm circumference measurements were evaluated before and 3 months after laser lipolysis. Patients were given the choice of undergoing the procedure on the contralateral arm at 3 months. Results. All patients achieved no improvement to minimal improvement in upper arm contour. One of five patients was elected to have lipolysis performed on the contralateral arm. Conclusion. Laser lipolysis may be safely performed with the parameters utilized in this pilot study, although minimal improvement was seen in upper extremity contour. 1. Introduction A number of fat-reduction procedures have emerged over recent years to address a demand for less invasive approaches, with an ultimate goal of imparting less risk while producing favorable results. These include the use of tumescent solutions [1], smaller gauge cannulas [2], external ultrasound [3], low-level external laser [4], injection lipolysis [5, 6], cryolipolysis [7], external radiofrequency energy [8], and percutaneous laser lipolysis [9]. Laser lipolysis has been described with and without concurrent suction lipectomy [9, 10]. Laser energy passes through an optical fiber and is directed at the subcutaneous fat layer. Adipocyte damage, or more specifically adipocyte cell membrane damage, can lead to cell content leakage to the interstitial compartment with potential irreversible cell collapse. Suction applied to the area can clear the interstitial fatty debris or this material can be allowed to be handled by innate metabolic mechanisms. The current pilot study aimed to evaluate patient satisfaction after laser lipolysis without suction of the proximal upper extremity with a treatment endpoint of 41 degrees Celsius in the subcutaneous layer. This temperature was selected based on previous determinations that higher sustained dermal temperatures can lead to irreversible necrosis [11]. 2. Materials and Methods Five female patients who expressed a desire for improved upper arm contour were included in this prospective pilot study which was performed according to
Professionalism education of OB/GYN resident physicians: What makes a difference?  [PDF]
Brett Worly
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.31A026
Abstract:

Objective: The aim of this study was to evaluate the efficacy of a new Professionalism curriculum in an Obstetrics and Gynecology (OB/GYN) residency after introducing Narrative Medicine and Professional Development/Support Group (PDSG) programs. Methods: 32 OB/GYN residents participated in this IRB approved pilot study. Twenty residents were assessed with the Barry Challenges to Professionalism Questionnaire (Barry), the Jefferson Scale of Empathy-Physician Version (JSE), and the Jefferson Scale of Attitudes Toward Physician-Nurse Collaboration (JSAT) in August 2010, as controls. Five Narrative Medicine sessions and four PDSG sessions were then used from August 2010-May 2011, for resident physician professionalism education. Seventeen residents then underwent post-testing with the Barry, JSE, and JSAT in May 2011. Results: The pre-test/post-test Barry comparison showed an improvement in scores after introduction of the new Narrative Medicine and PDSG curriculum (7.6 +/- 2.1 versus 8.4 +/- 1.6; p = 0.10) though this was not statistically significant. Pre-test/post-test comparison of JSAT scores showed a statistically significant decline in collaboration (52.3 +/- 4.1 versus 49.7 +/- 3.7; p = 0.028) while JSE scores showed a downward trend in empathy (109.3 +/- 10.0 versus 104.8 +/- 9.2; p = 0.086). Conclusion: Narrative Medicine and PDSG small group sessions could be an effective component of OB/GYN resident physician Professionalism curriculum. This pilot project was underpowered, due to limited resources.

Delirium: moving beyond the clinical diagnosis
Coulson, Brett S;Almeida, Osvaldo P;
Revista Brasileira de Psiquiatria , 2002, DOI: 10.1590/S1516-44462002000500007
Abstract: delirium is a common mental disorder that has been associated with increased length of hospital stay and health costs, as well as higher morbidity and mortality rates in later life. to date, psychiatric interventions have mostly been limited to the clinical diagnosis of delirium and treatment of the behavioural and psychological complications of the acute episode, although this seems to have a negligible impact on the course and long-term outcome of patients. this paper reviews the development of recent strategies designed to reduce the incidence and complications of delirium, and proposes that an effective management plan must always include the basic components of primary, secondary and tertiary prevention.
The Information Warfare Life Cycle Model
Brett van Niekerk,Manoj S. Maharaj
South African Journal of Information Management , 2011, DOI: 10.4102/sajim.v13i1.476
Abstract: Information warfare (IW) is a dynamic and developing concept, which constitutes a number of disciplines. This paper aims to develop a life cycle model for information warfare that is applicable to all of the constituent disciplines. The model aims to be scalable and applicable to civilian and military incidents where information warfare tactics are employed. Existing information warfare models are discussed, and a new model is developed from the common aspects of these existing models. The proposed model is then applied to a variety of incidents to test its applicability and scalability. The proposed model is shown to be applicable to multiple disciplines of information warfare and is scalable, thus meeting the objectives of the model. How to cite this article: Van Niekerk, B. & Maharaj, M.S., 2011, ‘The Information Warfare Life Cycle Model’, SA Journal of Information Management 13(1), Art. #476, 9 pages. http://dx.doi.org/10.4102.sajim.v13i1.476
Delirium: moving beyond the clinical diagnosis
Coulson Brett S,Almeida Osvaldo P
Revista Brasileira de Psiquiatria , 2002,
Abstract: Delirium is a common mental disorder that has been associated with increased length of hospital stay and health costs, as well as higher morbidity and mortality rates in later life. To date, psychiatric interventions have mostly been limited to the clinical diagnosis of delirium and treatment of the behavioural and psychological complications of the acute episode, although this seems to have a negligible impact on the course and long-term outcome of patients. This paper reviews the development of recent strategies designed to reduce the incidence and complications of delirium, and proposes that an effective management plan must always include the basic components of primary, secondary and tertiary prevention.
Global Asymptotic Behavior of yn+1=(pyn+yn ¢ ’1)/(r+qyn+yn ¢ ’1)
A. Brett,M. R. S. Kulenovi?
Advances in Difference Equations , 2008, DOI: 10.1155/2007/41541
Abstract: We investigate the global stability character of the equilibrium points and the period-two solutions of yn+1=(pyn+yn ¢ ’1)/(r+qyn+yn ¢ ’1),n=0,1, ¢ € |, with positive parameters and nonnegative initial conditions. We show that every solution of the equation in the title converges to either the zero equilibrium, the positive equilibrium, or the period-two solution, for all values of parameters outside of a specific set defined in the paper. In the case when the equilibrium points and period-two solution coexist, we give a precise description of the basins of attraction of all points. Our results give an affirmative answer to Conjecture 9.5.6 and the complete answer to Open Problem 9.5.7 of Kulenovi and Ladas, 2002.
RELEVANCE OF INFORMATION WARFARE MODELS TO CRITICAL INFRASTRUCTURE PROTECTION
Brett Van Niekerk,Manoj S. Maharaj
Scientia Militaria : South African Journal of Military Studies , 2011, DOI: 10.5787/39-2-114
Abstract: This article illustrates the relevance of information warfare models to critical infrastructure protection. Analogies of information warfare models to those of information security and information systems were used to deconstruct the models into their fundamental components and this will be discussed. The models were applied to critical infrastructures to illustrate the relevance to critical infrastructure protection. By considering the interdependencies of the critical infrastructure sectors, it will be shown how all critical infrastructures can be modelled as information infrastructures when considering information warfare attacks.
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