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Watson R, Rehman S, Ali P. Stressors affecting nursing students in Pakistan. Int Nurs Rev 2017; 64:536-543. [DOI: 10.1111/inr.12392] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rehman S, Karmakar A, Almustafa M, Kumar N. Ketoacidosis in the diabetic neurosurgical patient: The steroid conundrum. JOURNAL OF NEUROANAESTHESIOLOGY AND CRITICAL CARE 2017. [DOI: 10.1055/s-0038-1646221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Anwer S, Majeed A, Naveed A, Rehman S. ULTRASONOGRAPHY OF THE INTERNAL JUGULAR VEIN TO ASSESS INTRAVASCULAR STATUS IN THE ED. Arch Emerg Med 2016. [DOI: 10.1136/emermed-2016-206402.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Weiner A, Speirs C, DeWees T, Rehman S, Molotievschi A, Velez M, Mullen D, Fergus S, Trovo M, Baggstrom M, Morgensztern D, Govindan R, Waqar S, Bradley J, Robinson C. Consolidation Chemotherapy Following Weekly Carboplatin-Paclitaxel Based Chemoradiation for Locally Advanced Non-Small Cell Lung Cancer Is Associated With Improved Overall and Disease-Free Survival. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Munir S, Rahman SB, Rehman S, Saba N, Torinsson Naluai Å, Agha H, Ahmad W, Mazhar K. The angiotensin-converting enzyme gene insertion polymorphism: a higher risk for psoriasis in male patients. Br J Dermatol 2016; 175:824-6. [PMID: 27061294 DOI: 10.1111/bjd.14653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Roach M, Rehman S, DeWees T, Bradley J, Robinson C. OC-0137: Tumour size but not location determines survival and control of lung stereotactic body radiotherapy. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31386-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Speirs C, LaBrash J, Mutic S, Rao Y, Rehman S, Roach M, Michalski J, Perkins S. PO-0859: Quantifying and categorizing plan rejections as a part of the clinical process improvement. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32109-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Stevenson G, Rehman S, Draper E, Hernández-Nava E, Hunt J, Haycock JW. Combining 3D human in vitro methods for a 3Rs evaluation of novel titanium surfaces in orthopaedic applications. Biotechnol Bioeng 2016; 113:1586-99. [PMID: 26702609 PMCID: PMC4982034 DOI: 10.1002/bit.25919] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/21/2015] [Accepted: 12/22/2015] [Indexed: 11/06/2022]
Abstract
In this study, we report on a group of complementary human osteoblast in vitro test methods for the preclinical evaluation of 3D porous titanium surfaces. The surfaces were prepared by additive manufacturing (electron beam melting [EBM]) and plasma spraying, allowing the creation of complex lattice surface geometries. Physical properties of the surfaces were characterized by SEM and profilometry and 3D in vitro cell culture using human osteoblasts. Primary human osteoblast cells were found to elicit greater differences between titanium sample surfaces than an MG63 osteoblast-like cell line, particularly in terms of cell survival. Surface morphology was associated with higher osteoblast metabolic activity and mineralization on rougher titanium plasma spray coated surfaces than smoother surfaces. Differences in osteoblast survival and metabolic activity on titanium lattice structures were also found, despite analogous surface morphology at the cellular level. 3D confocal microscopy identified osteoblast organization within complex titanium surface geometries, adhesion, spreading, and alignment to the biomaterial strut geometries. Mineralized nodule formation throughout the lattice structures was also observed, and indicative of early markers of bone in-growth on such materials. Testing methods such as those presented are not traditionally considered by medical device manufacturers, but we suggest have value as an increasingly vital tool in efficiently translating pre-clinical studies, especially in balance with current regulatory practice, commercial demands, the 3Rs, and the relative merits of in vitro and in vivo studies. Biotechnol. Bioeng. 2016;113: 1586-1599. © 2015 The Authors. Biotechnology and Bioengineering Published by Wiley Periodicals, Inc.
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Drake TC, Hsu FC, Hire D, Chen SH, Cohen RM, McDuffie R, Nylen E, O'Connor P, Rehman S, Seaquist ER. Factors associated with failure to achieve a glycated haemoglobin target of <8.0% in the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial. Diabetes Obes Metab 2016; 18:92-5. [PMID: 26435375 PMCID: PMC6241305 DOI: 10.1111/dom.12569] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 07/26/2015] [Accepted: 08/28/2015] [Indexed: 11/30/2022]
Abstract
The aim of this study was to identify the clinical features of participants in the standard therapy arm of the Action to Control Cardiovascular Risk in Diabetes (ACCORD) glycaemia trial who failed to reach the glycated haemoglobin (HbA1c) target. We analysed 4685 participants in the standard therapy arm, comparing participants who reached the HbA1c target of <8.0% with those whose HbA1c level was ≥8.0% 12 months after randomization. Baseline and 12-month clinical characteristics were compared. At 12 months after randomization, 3194 participants had HbA1c <8.0% and 1491 had HbA1c ≥8.0%. Black race [odds ratio (OR) 0.74, 95% confidence interval (CI) 0.61-0.89; p = 0.002], severe hypoglycaemia (OR 0.57, CI 0.37-0.89; p = 0.014) and insulin use (OR 0.51, CI 0.40-0.65; p < 0.001) were associated with failure to reach HbA1c goal at 12 months in the adjusted model. Even with free medications, free visits with clinicians and aggressive titration of medications, >30% of participants in the standard arm of the ACCORD trial had an HbA1c ≥8.0% at 1 year. Participants who were black, had severe hypoglycaemia and were on insulin were more likely to have an above-target HbA1c concentration after 12 months on the standard protocol.
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Rehman S, Challa S, Majumdar A. A preliminary analysis of 96 patients enrolled in the BAOMS National 3rd Molar Audit (N3MA) at Milton Keynes General Hospital (MKGH) NHS Foundation Trust. Br J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.bjoms.2015.08.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rehman S, Roach M, Mullen D, DeWees T, Bradley J, Robinson C. Stereotactic Body Radiation Therapy (SBRT) for Treatment of Lung Oligometastases. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bradley J, Gao F, Parikh P, Roach M, Rehman S, Kashani R, Ganachaud J, Stroud J, DeWees T, Robinson C. Prospective Phase 2 Clinical Trial of Radiation Dose-Escalated Stereotactic Body Radiation Therapy (SBRT) for Centrally Located Lung Cancer: An Institutional Trial. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Chundury A, Rehman S, Roach M, Mullen D, DeWeese T, Bradley J, Robinson C. PD-0428: Radiation pneumonitis with stereotactic body radiotherapy: effects of angiotensin converting enzyme inhibitors. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40424-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rehman S, Roach M, Mullen D, DeWees T, Bradley J, Robinson C. PO-0673: Stereotactic body radiotherapy for histopathologically confirmed vs. presumed early stage NSCLC. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40665-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Peila R, Actis Grande G, Giansetti M, Rehman S, Sicardi S, Rovero G. Washing off intensification of cotton and wool fabrics by ultrasounds. ULTRASONICS SONOCHEMISTRY 2015; 23:324-332. [PMID: 25258212 DOI: 10.1016/j.ultsonch.2014.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 07/02/2014] [Accepted: 09/04/2014] [Indexed: 06/03/2023]
Abstract
Wet textile washing processes were set up for wool and cotton fabrics to evaluate the potential of ultrasound transducers (US) in improving dirt removal. The samples were contaminated with an emulsion of carbon soot in vegetable oil and aged for three hours in fan oven. Before washing, the fabrics were soaked for 3 min in a standard detergent solution and subsequently washed in a water bath. The dirt removal was evaluated through colorimetric measurements. The total color differences ΔE of the samples were measured with respect to an uncontaminated fabric, before and after each washing cycle. The percentage of ΔE variation obtained was calculated and correlated to the dirt removal. The results showed that the US transducers enhanced the dirt removal and temperature was the parameter most influencing the US efficiency on the cleaning process. Better results were obtained at a lower process temperature.
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Riaz F, Hassan A, Rehman S, Niazi I, Jochumsen M, Dremstrup K. Processing movement related cortical potentials in EEG signals for identification of slow and fast movements. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2014:4908-11. [PMID: 25571092 DOI: 10.1109/embc.2014.6944724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The extraction of intended kinetic information from an EEG signal can have several applications related to the rehabilitation for subjects with various neurological disorders. However, the task is mainly constrained by the low signal-to-noise ratio for the EEG signals. It is well known that the cortical activity takes place at a very low frequency since it is characterized by the dropping of movement related cortical potential (MRCP) across the sampled EEG signal. The strong variations in the MRCP is indicative of the noise due to various sources. The aim of this work is to remove this noise from the EEG signals using empirical mode decomposition, which decomposes a signal into harmonics (intrinsic mode functions--IMF) of various frequencies. The IMFs pertaining to small frequencies are later used for features extraction where we extract the spatial and spectral features from the selected IMFs. The features are later used for classification using support vector machines (SVM). Our experiments show superior results to the benchmark method for the underlying dataset that has been used in this research.
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Cammareri G, Lanzani C, Cirillo F, Turba F, Rehman S, Ferrazzi E. New-Generation Reusable Bipolar Electrode in Office Hysteroscopy. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Rehman S, John SKP, Lochan R, Jaques BC, Manas DM, Charnley RM, French JJ, White SA. Oncological feasibility of laparoscopic distal pancreatectomy for adenocarcinoma: a single-institution comparative study. World J Surg 2014; 38:476-83. [PMID: 24081543 DOI: 10.1007/s00268-013-2268-2] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Laparoscopic distal pancreatectomy (LDP) is performed increasingly for pancreatic pathology in the body and tail of the pancreas. However, only few reports have compared its oncological efficacy with open distal pancreatectomy (ODP). We compared these two techniques in patients with pancreatic ductal adenocarcinoma. METHODS From a prospectively maintained database, all patients who underwent either LDP or ODP for adenocarcinoma in the body and tail of the pancreas between January 2008 and December 2011 were compared. Data were analysed using SPSS(®) v19 utilising standard tests. A p value <0.05 was considered significant. RESULTS Of 101 patients who underwent distal pancreatectomy, 22 had histologically confirmed adenocarcinoma (LDP n = 8, ODP n = 14). Both groups were well matched for age and the size of tumour (22 vs. 32 mm, p = 0.22). Intraoperative blood loss was 306 ml compared with 650 ml for ODP (p = 0.152). A longer operative time was noted for LDP (376 vs. 274 min, p < 0.05). Total length of stay was shorter for LDP compared with ODP (8 vs. 12 days, p = 0.05). The number of postoperative pancreatic fistulas were similar (LDP n = 2 vs. ODP n = 3, p = 0.5). Complete resection (R0) was achieved in 88 % of LDP (n = 7) compared with 86 % of ODP (n = 12). The median number of lymph nodes harvested was 16 for LDP versus 14 for ODP. Overall 3-year survival also was similar: LDP = 82 %, ODP = 74 % (p = 0.89). CONCLUSIONS From an oncological perspective, LDP is a viable procedure and its results are comparable to ODP for ductal adenocarcinomas arising in the body and tail of the pancreas.
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Roach M, Rehman S, DeWees T, Mullen D, Bradley J, Robinson C. Stereotactic Body Radiation Therapy for the Treatment of Multiple Primary Non-Small Cell Lung Carcinoma. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rehman S, Speirs C, Molotievschi A, Mullen D, Fergus S, DeWees T, Velez M, Bradley J, Robinson C. Evaluating a Nomogram for the Development of Radiation Pneumonitis in Locally Advanced Non-Small Cell Lung Cancer Treated With 3D and Intensity Modulated Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.654] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Speirs C, Rehman S, Molotievschi A, Velez M, DeWees T, Mullen D, Fergus S, Bradley J, Robinson C. Comprehensive Analysis of Dosimetric Predictors of Overall Survival for Stage III Non-Small Cell Lung Cancer (NSCLC) Treated With Definitive Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1964] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Dewhirst E, Rehman S, Tobias JD. Perioperative care of an infant with pyruvate dehydrogenase deficiency. SOUTHERN AFRICAN JOURNAL OF ANAESTHESIA AND ANALGESIA 2014. [DOI: 10.1080/22201173.2012.10872837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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John SKP, Robinson SM, Rehman S, Harrison B, Vallance A, French JJ, Jaques BC, Charnley RM, Manas DM, White SA. Prognostic factors and survival after resection of colorectal liver metastasis in the era of preoperative chemotherapy: an 11-year single-centre study. Dig Surg 2013; 30:293-301. [PMID: 23969407 DOI: 10.1159/000354310] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Accepted: 07/14/2013] [Indexed: 12/13/2022]
Abstract
INTRODUCTION A variety of factors have been identified in the literature which influence survival following resection of colorectal liver metastases (CRLM). Much of this literature is historical, and its relevance to contemporary practice is not known. The aim of this study was to identify those factors which influence survival during the era of preoperative chemotherapy in patients undergoing resection of CRLM in a UK centre. METHODS All patients having liver resection for CRLM during an 11-year period up to 2011 were identified from a prospectively maintained database. Prognostic factors analysed included tumour size (≥5 or <5 cm), lymph node status of the primary tumour, margin positivity (R1; <1 mm), neo-adjuvant chemotherapy (for liver), tumour differentiation, number of liver metastases (≥4), preoperative carcinoembryonic antigen (CEA; ≥200 ng/ml) and whether metastases were synchronous (i.e. diagnosed within 12 months of colorectal resection) or metachronous to the primary tumour. Overall survival (OS) was compared using Kaplan-Meier plots and a log rank test for significance. Multivariate analysis was performed using a Cox regression model. Statistical analysis was performed in SPSS v19, and p < 0.05 was considered to be significant. RESULTS 432 patients underwent resection of CRLM during this period (67% male; mean age 64.5 years), and of these, 54 (13.5%) had re-resections. The overall 5-year survival in this series was 43% with an actuarial 10-year survival of 40%. A preoperative CEA ≥200 ng/ml was present in 10% of patients and was associated with a poorer 5-year OS (24 vs. 45%; p < 0.001). A positive resection margin <1 mm was present in 16% of patients, and this had a negative impact on 5-year OS (15 vs. 47%; p < 0.001). Tumour differentiation, number, biliary or vascular invasion, size, relationship to primary disease, nodal status of the primary disease or the use of neo-adjuvant chemotherapy had no impact on OS. Multivariate analysis identified only the presence of a positive resection margin (OR 1.75; p < 0.05) and a preoperative CEA ≥200 ng/ml (OR 1.88; p < 0.01) as independent predictors of poor OS. CONCLUSION Despite the wide variety of prognostic factors reported in the literature, this study was only able to identify a preoperative CEA ≥200 ng/ml and the presence of tumour within 1 mm of the resection margin as being of value in predicting survival. These variables are likely to identify patients who may benefit from intensive follow-up to enable early aggressive treatment of recurrent disease.
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Hafeez M, Rehman S, Manzoor U, Khan MA, Bhatti AS. Catalyst driven optical properties of the self-assembled ZnS nanostructures. Phys Chem Chem Phys 2013; 15:9726-34. [PMID: 23673360 DOI: 10.1039/c3cp50534k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In this paper, we present the effect of different catalysts (Mn, Au and Sn) on the room temperature photoluminescence and Raman spectra of VLS grown ZnS nanostructures. The catalysts found to self-dope the ZnS nanostructures during its growth were confirmed by XRD and XPS results. The extent of self-doping, which depended on the type and size of catalysts, was observed strongly to have affected the optical properties of ZnS nanostructures, particularly intrinsic defects like S and Zn vacancies. Intense broad bands in the visible due to intrinsic defects, namely Zn and S vacancies were observed, which were quite different for each catalyst as well as for the size of the catalyst. Au and Mn catalyzed ZnS nanostructures also showed creation of catalyst related defects, which were absent in the case of Sn. From the PL spectra, an estimation of the Zn and S vacancies was made for each type of catalyzed ZnS nanostructures. Surface optic (SO) phonon modes of the ZnS nanostructures were also observed to behave differently for the three catalysts. The dielectric continuum model was applied to determine the correlation length and variation in the surface potential modulations in these nanostructures. It was deduced from optical studies that the location of dopant in self-doped ZnS nanostructures strongly affected the luminescence properties. Finally it was concluded that self-doping using a suitable catalyst can be a simple and controllable way to dope ZnS nanostructures with tailored optical characteristics.
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Sahin AZ, Mokheimer EM, Bahaidarah HM, Antar MA, Gandhidasan P, Ben-Mansour R, Al-Dini S, Rehman S, Bejan A, Al-Nimr MA, Oztop HF, Chen L, Midilli A, Lawrence J. Special Issue: Thermodynamic Optimization, Exergy Analysis, and Constructal Design. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2013. [DOI: 10.1007/s13369-012-0519-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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