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Analytical, Diagnostic and Therapeutic Techniques and Equipment Commons™
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Articles 1 - 30 of 51
Full-Text Articles in Analytical, Diagnostic and Therapeutic Techniques and Equipment
Analysis Of Indentation Loading Of Cortical Bone Using Acoustic Emission Techniques, Ashkan Safari, Ger Reilly, Brendan Mccormack
Analysis Of Indentation Loading Of Cortical Bone Using Acoustic Emission Techniques, Ashkan Safari, Ger Reilly, Brendan Mccormack
Conference Papers
In this study, we recorded the number of Acoustic emission (AE) hits and related AE energy during indentation fracture of cortical bone using a PAC PCI-2 card and pico sensor. A threshold value of 43dB was used to filter premature trigger due to background noise. Registered AE hits had more than one count (threshold crossing). Amplifier gain was set at 40dB with a (0.1-1) MHz band pass filter. 8mm cubes of cortical bones were indented in the longitudinal direction at constant crosshead speed of 1 mm min-1 using a large 2D, 50˚ wedge indenter. We hypothesised that signals occurring as …
Retrospective Review Of The Use Of Swan Ganz Catheters In Our Intensive Care Unit (Icu): A Short Report, Shahla Siddiqui
Retrospective Review Of The Use Of Swan Ganz Catheters In Our Intensive Care Unit (Icu): A Short Report, Shahla Siddiqui
Department of Anaesthesia
The widespread and often 'misuse' of the Swan Ganz (SG) or Pulmonary artery catheter has often been seen in intensive care patients. The objective of this preliminary review was to observe the trends and possibly formulate an association with outcome of the use of SG catheters as well as to determine the frequency of use and possible complications. The chart review of ten patients was carried out for the months of January and February 2004 in a retrospective manner. The incidence of SG catheter insertion was 12% per month on average. Nine out of 10 patients received the SG catheters …
Accuracy Of The Newtom 3g™ In Measuring The Angle Of The Articular Eminence, Rehana Khan
Accuracy Of The Newtom 3g™ In Measuring The Angle Of The Articular Eminence, Rehana Khan
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to determine the accuracy of the Newtom 3G™ in determining the angulation of the articular eminence. The benefits of conducting this study were to provide additional uses for the standard records that are taken for the purposes of orthodontic treatment, as well as evaluate the Newtom 3G™ for accuracy in measuring the anatomy of the glenoid fossa. This study required 20 participants that volunteered to allow their records to be used. Records evaluated were the Newtom 3G™, impressions, and wax check bite registrations. The wax record was taken using the 'forced bite' technique to …
Cardiac Transplant Following Failed Fontan Or Glenn Procedures., Naveen L. Pereira, Girish S. Shirali
Cardiac Transplant Following Failed Fontan Or Glenn Procedures., Naveen L. Pereira, Girish S. Shirali
Manuscripts, Articles, Book Chapters and Other Papers
No abstract provided.
Near-Infrared Characterization Of Breast Tumors In Vivo Using Spectrally-Constrained Reconstruction, Subhadra Srinivasan, Brian W. Pogue, Ben Brooksby, Shudong Jiang, Hamid Dehghani, Christine Kogel, Wendy A. Wells, Steven P. Poplack, Keith D. Paulsen
Near-Infrared Characterization Of Breast Tumors In Vivo Using Spectrally-Constrained Reconstruction, Subhadra Srinivasan, Brian W. Pogue, Ben Brooksby, Shudong Jiang, Hamid Dehghani, Christine Kogel, Wendy A. Wells, Steven P. Poplack, Keith D. Paulsen
Dartmouth Scholarship
Multi-wavelength Near-Infrared (NIR) Tomography was utilized in this study to non-invasively quantify physiological parameters of breast tumors using direct spectral reconstruction. Frequency domain NIR measurements were incorporated with a new spectrally constrained direct chromophore and scattering image reconstruction algorithm, which was validated in simulations and experimental phantoms. Images of total hemoglobin, oxygen saturation, water, and scatter parameters were obtained with higher accuracy than previously reported. Using this spectral approach, in vivo NIR images are presented and interpreted through a series of case studies (n=6 subjects) having differing abnormalities. The corresponding mammograms and ultrasound images are also evaluated. Three of six …
Detection Of Microcracks During Bone Cutting Using Acoustic Emission Techniques, Ashkan Safari, Ger Reilly, Brendan Mccormack
Detection Of Microcracks During Bone Cutting Using Acoustic Emission Techniques, Ashkan Safari, Ger Reilly, Brendan Mccormack
Conference Papers
Surgeons may use a number of cutting instruments such as osteotomes and chisels to cut bone during operative procedures. The initial loading of cortical bone during the cutting process results in the formation of microcracks in the vicinity of the cutting zone with main crack propagation to failure occurring with continued loading; microcracking acts as a stimulus for main crack formation and has also been shown to occur during the propagation of the main crack. It has also been reported that Acoustic Emission (AE) is generated due to microcrack formation and crack growth, prior to, and during final fracture in …
De-Bonding 4 Brands Of Ceramic Brackets With The Waterlase Er,Cr;Ysgg Laser, Carter A. Lane
De-Bonding 4 Brands Of Ceramic Brackets With The Waterlase Er,Cr;Ysgg Laser, Carter A. Lane
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to determine if the Biolase Waterlase Er,Cr:YSGG laser could be used as a safe and effective tool to de-bond four currently available orthodontic ceramic brackets. Changes in interpulpal temperature, enamel surface conditions and the amount of time the laser was activated to debond (sic) the ceramic brackets were evaluated. Forty human maxillary premolars were divided into four groups of ten. Prior to direct bonding, all extracted teeth were impressed and duplicated in Araldite epoxy resin as the control surface. Identical techniques were used to bond 10 ceramic brackets from each manufacturer. Three of the …
Magnification In Images Produced By Five Popular Digital Lateral Cephalometric Machines, Gretchen Marie Schnepper
Magnification In Images Produced By Five Popular Digital Lateral Cephalometric Machines, Gretchen Marie Schnepper
Loma Linda University Electronic Theses, Dissertations & Projects
Modern digital lateral cephalometric images are produced by machines that vary in a number of critical features such as: 1) machine geometry, 2) movement (or lack of movement) of the x-ray source, 3) movement (or lack of movement) or x-ray detectors, 4) cephalostat geometry and 5) digital data manipulations by proprietary software. The purpose of this study was to evaluate the magnification characteristics of images produced by five commercial digital lateral cephalometric machines. These digital image magnification characteristics were then compared with images produced by an analog cephalometric machine. The two goals of this study were to: 1) measure the …
Charge-Switch Nucleotides, John G. K. Williams, Gregory R. Bashford, Jiyan Chen, Dan Draney, Nara Narayanan, Bambi L. Reynolds, Pamela Sheaff
Charge-Switch Nucleotides, John G. K. Williams, Gregory R. Bashford, Jiyan Chen, Dan Draney, Nara Narayanan, Bambi L. Reynolds, Pamela Sheaff
Biomedical Imaging and Biosignal Analysis Laboratory
The present invention provides compounds, methods and systems for sequencing nucleic acid using single molecule detection. Using labeled NPs that exhibit charge-switching behavior, single-molecule DNA sequencing in a microchannel sorting system is realized. In operation, sequencing products are detected enabling real-time sequencing as successive detectable moieties flow through a detection channel. By electrically sorting charged molecules, the cleaved product molecules are detected in isolation Without interference from unincorporated NPs and Without illuminating the polymerase-DNA complex.
Prevention Of Deep Vein Thrombosis And Pulmonary Embolism In The Perioperative Period: A Review, Aliya Ahmed
Prevention Of Deep Vein Thrombosis And Pulmonary Embolism In The Perioperative Period: A Review, Aliya Ahmed
Department of Anaesthesia
No abstract provided.
Apache Ii Score As A Predictor Of Length Of Stay And Outcome In Our Icus, Shahla Siddiqui, Saad Ahmed, Roshan Manasia
Apache Ii Score As A Predictor Of Length Of Stay And Outcome In Our Icus, Shahla Siddiqui, Saad Ahmed, Roshan Manasia
Department of Anaesthesia
The APACHE II (acute physiology and chronic health evaluation) is used widely for predicting probability of hospital mortality and length of stay in the ICU. APACHE II forms were available to all ICU residents within 24 hours of admission, and a score was assigned to them. Based on our results the APACHE II score has reliably predicted an outcome of the least amount of length of stay (LOS) in the ICU as well as a 100% probability of being shifted out of the ICU for a score of < 10 (according to international benchmarks). This reliable scoring system can be used for predicting mortality and length of stay and therefore, resource allocation, antibiotic use and ethical decisions regarding counseling families about end of life decisions--all within 24 hours of admissions.
Perioperative Anaesthetic Management Of A Patient With Relapsed Aplastic Anaemia, Aliya Ahmed, Abdul Monem
Perioperative Anaesthetic Management Of A Patient With Relapsed Aplastic Anaemia, Aliya Ahmed, Abdul Monem
Department of Anaesthesia
Aplastic anaemia occurs due to failure of blood cell production by bone marrow. All blood cell counts are low. Untreated patients may die within one year mainly due to uncontrolled infection due to neutropenia. Anaemia and thrombocytopenia cause troublesome symptoms and necessitate frequent red cell and platelets transfusions. Surgery poses a very high risk for these patients because of the several complications that can occur in the perioperative period. In this paper we report on a patient with relapsed aplastic anaemia who was optimized preoperatively and underwent a total abdominal hysterectomy under general anaesthesia.
Unanticipated Hospital Admission After Ambulatory Surgery, Mueenullah Khan, Aliya Ahmed, Laila Abdullah, Azmeena Nizar, Aslam Fareed, Fauzia Anis Khan
Unanticipated Hospital Admission After Ambulatory Surgery, Mueenullah Khan, Aliya Ahmed, Laila Abdullah, Azmeena Nizar, Aslam Fareed, Fauzia Anis Khan
Department of Anaesthesia
The unplanned admission rate is considered to be an important measure of the quality of ambulatory surgical units. The objective of our study was to evaluate the unanticipated hospital admission rate from the Surgical Day Care (SDC) unit of our university affiliated teaching hospital and to analyze the reasons for admission. A review of all unanticipated admissions over a one-year period was done. The admission rate was calculated and the reasons for admission were analysed. The overall admission rate was 4.93%. Most of the admissions were ordered by the surgeons (97%). The main reasons for admission were patient observation indicated …
Resonance Frequency Analysis As A Determinant Of Implant Initial Stability, Negar Tabandeh
Resonance Frequency Analysis As A Determinant Of Implant Initial Stability, Negar Tabandeh
Loma Linda University Electronic Theses, Dissertations & Projects
Introduction: The clinicians' decision regarding immediate loading is largely determined by the assessment of initial stability of the dental implant. Computed tomographic assessment of recipient site bone quality, insertion resistance torque and post-insertion resonance frequency are currently the only objective methods of measurement establishing initial stability.
Purpose: A study was designed to measure resonance frequency of root form dental implants placed in cadaver jaws. The resonance frequency values were compared to previous subjective and objective data reported in prior studies in the series.
Materials and Methods: Resonance frequency measurements were secured using the Osstell ™ mentor unit on 4.0 X …
The Effect Of Electrical Stimulation On Blood Flow In Chronic Wounds In Patients With And Without Diabetes, Daryl J. Lawson
The Effect Of Electrical Stimulation On Blood Flow In Chronic Wounds In Patients With And Without Diabetes, Daryl J. Lawson
Loma Linda University Electronic Theses, Dissertations & Projects
Background and Purpose. Only 3% of the U S population is afflicted by diabetes, yet one of the most common chronic wounds is the diabetic ulcer. Decrease in blood flow may be one reason why only 31% of neuropathic diabetic ulcers heal in 20-weeks. The purpose of this investigation was to compare healing rates and blood flow of chronic stage III and IV wounds in people with diabetes and those without diabetes over four weeks of treatment. Blood flow was measured before, during, and after stimulation using one of two different electrical stimulation waveforms in a 32°C room.
Subjects …
Comparison Of Different Methods Of Assessing Ridge Width Prior To Implant Placement, Lung-Cheng Chen
Comparison Of Different Methods Of Assessing Ridge Width Prior To Implant Placement, Lung-Cheng Chen
Loma Linda University Electronic Theses, Dissertations & Projects
The aim of this study was to compare the following 3 methods of assessing alveolar ridge dimensions prior to placement of dental implants: 1) ridge mapping measurement before surgical flap reflection using a caliper; 2) direct caliper measurement following surgical exposure of the bone, and 3) measurement using images from cone beam computerized tomography.
Sixteen subjects having 25 sites for planned implant placement or ridge augmentation were recruited. An acrylic stent was fabricated for each patient. The stent provided 3 buccal/lingual pairs of consistent measurement points for each implant site, located 4, 7 and 10 mm from the summit of …
Tracking The Time To Recovery After Induced Loudness Reduction (L), Yoav Arieh, Karen Kelly, Lawrence E. Marks
Tracking The Time To Recovery After Induced Loudness Reduction (L), Yoav Arieh, Karen Kelly, Lawrence E. Marks
Department of Psychology Faculty Scholarship and Creative Works
In induced loudness reduction (ILR), a strong tone causes the loudness of a subsequently presented weak tone to decrease. The aim of the experiment was to determine the time required for loudness to return to its initial level after ILR. Twenty-four subjects were exposed to 5, 10, 20, or 40 brief bursts of 2500-Hz pure tones at 80-dB SPL (inducers) and then tested in a series of paired comparison trials. Subjects compared the loudness of a weak target (2500 Hz at 60-dB SPL) to the loudness of a comparison tone at 500 Hz previously judged to match the target. The …
Nucleic Acid Sequencing Using Charge-Switch Nucleotides, John G. K. Williams, Gregory R. Bashford
Nucleic Acid Sequencing Using Charge-Switch Nucleotides, John G. K. Williams, Gregory R. Bashford
Biomedical Imaging and Biosignal Analysis Laboratory
The present invention provides compounds, methods and systems for sequencing nucleic acid using single molecule detection. Using labeled NPs that exhibit charge-switching behavior, single-molecule DNA sequencing in a microchannel sorting system is realized. In operation, sequencing products are detected enabling real-time sequencing as successive detectable moieties flow through a detection channel. By electrically sorting charged molecules, the cleaved product molecules are detected in isolation without interference from unincorporated NPs and without illuminating the polymerase-DNA complex.
Motivated Breast Cancer Screening Behavior And Its Cultural Antecedents, Patricia M. Flynn
Motivated Breast Cancer Screening Behavior And Its Cultural Antecedents, Patricia M. Flynn
Loma Linda University Electronic Theses, Dissertations & Projects
Discrepancies in breast cancer screening behavior exist among various ethnic groups in the United States (Jacobs & Lauderdale, 2001), with Latino American women reporting particularly low screening rates in comparison to Anglo American women (ACS, 2002). Research indicates that behavior is in part influenced by aspects of culture and relevant psychological processes (Betancourt & Lopez, 1993; Betancourt & Fuentes, 2001). This study was designed to investigate the relations among cultural values, attributions regarding the causes for not screening, related emotions, expectancy that screening leads to early detection and value incentive of early detection as determinants of breast cancer screening intention …
Surgical Images: Soft Tissue. Incarcerated Gallbladder In A Parastomal Hernia., Shawn D. St Peter, Jacques Heppell
Surgical Images: Soft Tissue. Incarcerated Gallbladder In A Parastomal Hernia., Shawn D. St Peter, Jacques Heppell
Manuscripts, Articles, Book Chapters and Other Papers
No abstract provided.
Knowledge, Attitude And Practice Of Parturients Regarding Epidural Analgesia For Labour In A University Hospital In Karachi, Mohammed Raheel Minhas, Rehana Kamal, Gauhar Afshan, Hafsa Raheel
Knowledge, Attitude And Practice Of Parturients Regarding Epidural Analgesia For Labour In A University Hospital In Karachi, Mohammed Raheel Minhas, Rehana Kamal, Gauhar Afshan, Hafsa Raheel
Department of Anaesthesia
Objective: To assess the knowledge, sources of knowledge, attitude (fears and misconceptions) regarding Epidural Analgesia (EA) and practices of parturients delivery at Aga Khan University hospital (AKUH).Methods: A hospital based cross sectional study was conducted at the obstetric unit of AKUH, from November to December 2003. A questionnaire was filled through verbal interviews conducted on 448 parturients fulfilling the inclusion criteria.Results: Seventy six percent of the females were aware of epidural analgesia as a labor pain relieving method. However, only 19% availed EA. About 40% had heard about EA from their obstetricians and 64% from friends or relatives. Twenty even …
Relación Entre Ambliopía Refractiva Media Y Alta Y Grado De Estereopsis Medida Con El Test De Randot, Luisa Fernanda Figueroa Olarte, Magda Corredor, Lisley Cortés
Relación Entre Ambliopía Refractiva Media Y Alta Y Grado De Estereopsis Medida Con El Test De Randot, Luisa Fernanda Figueroa Olarte, Magda Corredor, Lisley Cortés
Ciencia y Tecnología para la Salud Visual y Ocular
Se realizó un estudio descriptivo para determinar el grado de estereopsis por medio del test de Randot en una muestra de pacientes entre 5 y 12 años con ambliopía refractiva media y alta que fueron atendidos en el Instituto de Investigaciones Optométricas IIO de la Universidad de La Salle, además para probar la hipótesis se realizó una revisión retrospectiva de historias de pacientes que asistieron a las unidades de ortóptica y pediatría del I.I.O., entre los años 2002 y 2004. Para fines de la investigación se utilizarán dos herramientas estadísticas: prueba de Hipótesis y Regresión Lineal. Para realizar el contraste …
Influencia De La Prismación En El Postoperatorio De Exotropias Intermitentes En Niños De 2 A 11 Años De Edad, Neida Esperanza Ronderos E., Alfonso Galvis
Influencia De La Prismación En El Postoperatorio De Exotropias Intermitentes En Niños De 2 A 11 Años De Edad, Neida Esperanza Ronderos E., Alfonso Galvis
Ciencia y Tecnología para la Salud Visual y Ocular
Se realizó un estudio prospectivo en niños de 2 a 11 años de edad, examinados en el Departamento de Oftalmología de la Clínica Colsubsidio entre el 1 de abril de 2004 y el 1 de abril de 2005, con exotropias intermitentes primarias entre 20 y 40 dioptrías prismáticas. Como criterio de inclusión se tuvo en cuenta, la edad, el ángulo de la desviación, que no presentaran ambliopía ni síndromes alfabéticos asociados; se excluyeron las exotropias secundarias y pacientes intervenidos con cirugía previamente. El propósito del estudio fue comparar la influencia de la prismación en el preoperatorio y su efecto en …
Citología De Impresión Una Técnica Novedosa Y Sencilla Para El Diagnostico De Alteraciones De La Superficie Ocular, Martha Fabiola Rodríguez A., Patricia Hernández Rodríguez
Citología De Impresión Una Técnica Novedosa Y Sencilla Para El Diagnostico De Alteraciones De La Superficie Ocular, Martha Fabiola Rodríguez A., Patricia Hernández Rodríguez
Ciencia y Tecnología para la Salud Visual y Ocular
El presente artículo es una revisión de la técnica de citología de impresión como herramienta diagnóstica para las alteraciones de la superficie ocular. Se han utilizado un amplio rango de técnicas adaptadas a la citología de impresión de conjuntiva y cornea, como son: diferentes coloraciones para observar las muestras en microscopio óptico, microscopia electrónica, inmunofluorescencia, inmunohistoquimica, reacción en cadena de la polimerasa (PCR) y citometría de flujo. Actualmente, esta técnica es muy utilizada como una alternativa no invasiva para obtener «biopsias» muy delgadas y células epiteliales de la superficie ocular, especialmente porque no presenta efectos colaterales o contraindicaciones. Ha sido …
Imposed Constraints On The Smith-Waterman Alignment Algorithm For Enhanced Modeling Of A Single-Molecule Dna Sequencer, Patrick G. Humphrey, Gregory R. Bashford
Imposed Constraints On The Smith-Waterman Alignment Algorithm For Enhanced Modeling Of A Single-Molecule Dna Sequencer, Patrick G. Humphrey, Gregory R. Bashford
Biomedical Imaging and Biosignal Analysis Laboratory
An effort has been underway to develop a system for de novo sequencing of single DNA molecules with very long reads. The system operates by optically detecting the passage of fluorescently tagged DNA bases through a detection zone. A successful system would be revolutionary with respect to speed, read length, cost and minimized laboratory infrastructure. An important part of system development is modeling of the detection process. In particular, predicting the expected error from a set of sequencing parameters is helpful in system design. This paper describes variations on the Smith-Waterman algorithm for subsequence alignment used in a single-molecule detection …
La Hipótesis Científica. Una Visión Integral, Carlos Escalante Angulo
La Hipótesis Científica. Una Visión Integral, Carlos Escalante Angulo
Ciencia y Tecnología para la Salud Visual y Ocular
No abstract provided.
Análisis Comparativo Del Comportamiento Motor Sobre La Efectividad Entre El Bifocal Flat Top Y El Lente Progresivo En Endotropías Acomodativas Con Ac/A Alto, Luz Myriam Durán Silva, Margarita Rosa González L.
Análisis Comparativo Del Comportamiento Motor Sobre La Efectividad Entre El Bifocal Flat Top Y El Lente Progresivo En Endotropías Acomodativas Con Ac/A Alto, Luz Myriam Durán Silva, Margarita Rosa González L.
Ciencia y Tecnología para la Salud Visual y Ocular
El efecto de los anteojos bifocales en niños con tasas AC/A elevadas es un método eficaz para controlar la endodesviación de cerca; pero hoy en día con el avance de la tecnología, aparecen los lentes progresivos, que son multifocales, especialmente diseñados para compensar las alteraciones visuales de cerca producidas por el exceso de acomodación y de convergencia. La potencia del lente progresivo varía sin discontinuidades, desde una potencia adecuada para visión de lejos, la intermedia y la visión de cerca. La potencia en éste multifocal proporciona un mayor campo visual, no interrumpe la percepción espacial visual; éstos cambios de potencia …
Editorial, Myriam Teresa Mayorga
Editorial, Myriam Teresa Mayorga
Ciencia y Tecnología para la Salud Visual y Ocular
No abstract provided.
Medical Technology: Contexts And Content In Science And Technology, Michael A. De Miranda, Mark Doggett, Jane T. Evans
Medical Technology: Contexts And Content In Science And Technology, Michael A. De Miranda, Mark Doggett, Jane T. Evans
Architectural and Manufacturing Sciences Faculty Publications
No abstract provided.
Ambliopía Nutricional: Alteraciones Generales Y Aspectos Para El Correcto Diagnóstico, Andrés Felipe Méndez Ortega
Ambliopía Nutricional: Alteraciones Generales Y Aspectos Para El Correcto Diagnóstico, Andrés Felipe Méndez Ortega
Ciencia y Tecnología para la Salud Visual y Ocular
Llamamos ambliopía a la disminución de la agudeza visual unilateral o bilateral que no tiene origen refractivo y para la cual tampoco se encuentran causas patológicas o estructurales diagnosticables bajo un examen físico del globo ocular. Es frecuentemente vinculada a los niños y en adultos es observada como consecuencia de un mal desarrollo a muy temprana edad. La ambliopía toxico-nutricional o por tabaco y alcohol es un tipo de ambliopía característica de pacientes varones adultos de edad media que tienen problemas de tabaquismo y/o alcoholismo acompañados de insuficiencias alimenticias específicas del complejo B. Los niveles de consumo de alcohol y …