Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 16 de 16
Filtrar
1.
Am J Infect Control ; 51(5): 514-519, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36933570

RESUMO

BACKGROUND: Hand hygiene (HH) is critical to prevent health care-associated infections (HAIs). Clinician perspectives on maintaining high reliability are poorly defined. METHODS: We surveyed physicians, nurse practitioners, and physician assistants to understand perceptions of and barriers to high reliability in HH. The Systems Engineering Initiative for Patient Safety 2.0 model was used to develop an electronic survey exploring 6 human factors engineering (HFE) domains. RESULTS: Among 61 respondents, 70% perceived HH as "essential" to patient safety. While 87% reported alcohol-based hand rub (ABHR) availability as very effective in improving HH reliability, 77% reported dispensers to be "sometimes" or "often" empty. Clinicians in surgery/anesthesia were more likely than those in medical specialties to note skin irritation from ABHR (OR 4.94; 95% CI 1.37-17.81) and less likely to believe feedback was effective in improving HH (OR 0.26; 95% CI 0.08-0.88). One quarter of respondents indicated the layout of patient care areas was not conducive to performing HH. Staffing shortages and the pace and demands of work precluded HH for 15% and 11% of respondents, respectively. CONCLUSIONS: Aspects of organizational culture, environment, tasks, and tools were identified as barriers to high reliability in HH. HFE principles can be applied to more effectively promote HH.


Assuntos
Infecção Hospitalar , Higiene das Mãos , Humanos , Desinfecção das Mãos , Reprodutibilidade dos Testes , Fidelidade a Diretrizes , Infecção Hospitalar/prevenção & controle , Etanol
2.
Am J Infect Control ; 51(8): 919-925, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-36463976

RESUMO

BACKGROUND: We instituted Kamishibai (K-card rounding) with the goals of improving indwelling urinary catheter maintenance bundle reliability and decreasing catheter-associated urinary tract infection (CAUTI) rates. METHOD: In a free-standing children's hospital, we undertook a hospital-wide quality improvement project from January 2019 to June 2021 after developing a K-card based on our urinary catheter maintenance bundle. Auditors used K-cards to ask standardized questions during weekly rounds. Bundle reliability and CAUTI rates were analyzed prospectively. RESULTS: During the study period, 826 K-card audits were performed for 657 unique patients. While overall maintenance bundle reliability remained stable at 84%, there was a statistically significant improvement in reliability to the bundle element "medical discussion of need for the urinary catheter" from 88% to 94% (P = .01). The hospital-wide CAUTI rate significantly decreased (incidence rate ratio, 0.38; 95% CI, 0.15-0.93; P = .04). DISCUSSION: Hospital-wide urinary catheter K-card rounding facilitated standardized data collection, discussion of reliability and real-time feedback to nurses. Maintenance bundle reliability remained stable after implementation, accompanied by a significant decrease in the CAUTI rate. CONCLUSIONS: Implementation of hospital-wide urinary catheter K-card rounding was associated with reduction in CAUTI rates. The project demonstrated likelihood of reproducibility with support of a multidisciplinary team.


Assuntos
Infecções Relacionadas a Cateter , Infecção Hospitalar , Infecções Urinárias , Humanos , Criança , Cateteres Urinários/efeitos adversos , Infecções Relacionadas a Cateter/epidemiologia , Infecções Relacionadas a Cateter/prevenção & controle , Reprodutibilidade dos Testes , Infecções Urinárias/epidemiologia , Infecções Urinárias/prevenção & controle , Infecções Urinárias/complicações , Melhoria de Qualidade , Cateterismo Urinário/efeitos adversos , Infecção Hospitalar/epidemiologia , Infecção Hospitalar/prevenção & controle , Infecção Hospitalar/etiologia
3.
Pediatrics ; 151(1)2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36587014

RESUMO

BACKGROUND: Acute pancreatitis (AP) represents a significant disease burden in the pediatric population. The management of AP includes fluid resuscitation, pain management, and early enteral feeds. Contrary to old dogma, early enteral feeding has been shown to improve outcomes and reduce hospital length of stay (LOS), yet uptake of this approach has not been standardized. Our aim was to standardize the management of AP, increasing the percentage of patients receiving early enteral nutrition from 40% to 65% within 12 months. METHODS: Between January 2013 and September 2021, we conducted a quality improvement initiative among patients hospitalized with AP. Interventions included the development of a clinical care pathway, integration of an AP order set, and physician education. Our primary outcome was the percentage of patients receiving enteral nutrition within 48 hours of admission, and our secondary outcome was hospital LOS. Balancing measures included hospital readmission rates. RESULTS: A total of 652 patients were admitted for AP during the project, of which 322 (49%) were included after pathway implementation. Before pathway development, the percentage of patients receiving early enteral nutrition was 40%, which increased significantly to 84% after our interventions. This improvement remained stable. Median LOS decreased significantly from 5.5 to 4 days during this timeframe. Our balancing measure of readmission rates did not change during the project period. CONCLUSIONS: Through multiple interventions, including the implementation of an AP clinical pathway, we significantly increased the proportion of patients receiving early enteral nutrition and decreased hospital LOS without increasing hospital readmission rates.


Assuntos
Nutrição Enteral , Pancreatite , Criança , Humanos , Pancreatite/terapia , Melhoria de Qualidade , Doença Aguda , Fatores de Tempo , Tempo de Internação
4.
J Pediatr ; 251: 127-133, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-35917842

RESUMO

OBJECTIVE: To decrease the percentage of patients undergoing an abdominal radiograph for evaluation of constipation within 24 hours of their initial gastroenterology visit. STUDY DESIGN: In January 2015, we implemented a quality improvement, evidence-based guideline (EBG) aimed at standardizing the initial assessment of patients presenting for a new outpatient gastroenterology visit with a primary complaint of constipation. Over the subsequent 5 years, we followed the clinical impact of this guideline initiation with the goal of decreasing unnecessary abdominal radiograph use by 10% within 1 year of EBG launch. Patients older than 6 months and younger than 19 years were included. RESULTS: In total, 6723 patients completed new patient gastroenterology visits for a primary diagnosis of constipation between 2013 and 2019. Of these, 993 (14.8%) patients had abdominal radiographs taken within 24 hours of their initial visit. Over the 7 years of this project, a mean frequency of abdominal radiograph use decreased from 24% to less than 11%. In addition, a 57% decrease in hospital charges related to decreased radiograph use for constipation was found. No increases in subsequent emergency department visits or hospitalization for constipation within 30 days of patients' initial visits were seen. CONCLUSIONS: Through local adoption of an EBG, routine use of abdominal radiographs taken during a patient's initial outpatient gastroenterology visit for constipation decreased by more than 50%. This reduction was maintained over a subsequent 5-year period without any detrimental side effects.


Assuntos
Constipação Intestinal , Melhoria de Qualidade , Criança , Humanos , Raios X , Constipação Intestinal/diagnóstico por imagem , Radiografia Abdominal , Serviço Hospitalar de Emergência
5.
J Perinatol ; 42(5): 671-676, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-34584196

RESUMO

OBJECTIVE: Death certificates commonly contain errors, which hinders understanding of infant mortality. We, therefore, undertook a quality improvement (QI) initiative to improve death reporting in our neonatal intensive care unit (NICU). STUDY DESIGN: After our baseline assessment (January 1, 2015 to June 30, 2017), we implemented our QI initiatives using Plan, Do, Study, Act (PDSA) tests of change. We prospectively reviewed death certificates (July 1, 2017 to December 31, 2019) to evaluate the impact of our interventions. RESULTS: The overall proportion of incorrect death certificates significantly decreased from 71 to 22% with special cause variation noted after the second PDSA cycle. The most common errors involved inaccurate or incomplete reporting of prematurity and errors in the sequence of events. CONCLUSION: Through a series of PDSA cycles focused on formal provider education and ongoing review, we significantly reduced inaccurate death reporting. These interventions are generalizable across NICUs and important to improve public health reporting accuracy.


Assuntos
Doenças do Recém-Nascido , Unidades de Terapia Intensiva Neonatal , Humanos , Lactente , Mortalidade Infantil , Recém-Nascido de Baixo Peso , Recém-Nascido , Melhoria de Qualidade
6.
J Perinatol ; 41(6): 1487-1494, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33758388

RESUMO

OBJECTIVE: Variation exists in neonatal platelet transfusion practices. Recent studies found potential harm in liberal platelet transfusion practices, supporting the use of lower transfusion thresholds. Our aim was to reduce non-indicated platelet transfusions through implementation of a restrictive platelet transfusion guideline. STUDY DESIGN: Platelet transfusions from January 2017 to December 2019 were classified as indicated or non-indicated using the new guideline. Interventions included guideline implementation and staff education. Outcomes were evaluated using statistical process control charts. Major bleeding was the balancing measure. RESULT: During study, 438 platelet transfusions were administered to 105 neonates. The mean number of non-indicated platelet transfusions/month decreased from 7.3 to 1.6. The rate of non-indicated platelet transfusions per 100 patient admissions decreased from 12.5 to 2.9. Rates of major bleeding remained stable. CONCLUSIONS: Implementation of a restrictive neonatal platelet transfusion guideline significantly reduced potentially harmful platelet transfusions in our NICU without a change in major bleeding.


Assuntos
Transfusão de Plaquetas , Melhoria de Qualidade , Humanos , Recém-Nascido
7.
Pediatr Qual Saf ; 5(2): e258, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32426625

RESUMO

INTRODUCTION: To increase the rate of iron sufficiency among neonatal intensive care unit (NICU) patients from 16% to >35% within 12 months of implementing standardized assessment of reticulocyte hemoglobin (retHE). METHODS: We implemented a quality improvement (QI) study to improve iron sufficiency in our out-born level III/IV NICU. We screened 2,062 admissions, of which 622 were eligible based on feeding status at discharge. QI interventions included educational efforts and guideline implementation. Our primary outcome measure was the percentage of patients with their discharge retHE measure within the normal range. We also tracked the process measure of the number of retHE tests performed and a balancing measure of the incidence of elevated retHE among patients receiving iron supplementation. Statistical process control (SPC) charts assessed for special cause variation. RESULTS: The percentage of patients with a retHe within the normal range was significantly increased from a mean of 20% to 39% on SPC chart analysis. We measured significantly more retHE values after guideline implementation (11/mo to 24/mo) and found no cases of elevated retHE among patients receiving iron supplementation. CONCLUSIONS: After the implementation of a standardized guideline, a higher rate of iron sufficiency was found in NICU patients at discharge. This work is generalizable to neonatal populations with the potential for a significant impact on clinical practice.

8.
Pediatrics ; 145(2)2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-31996405

RESUMO

OBJECTIVES: Oropharyngeal dysphagia and aspiration may occur in infants and children. Currently, there is wide practice variation regarding when to feed children orally or place more permanent gastrostomy tube placement. Through implementation of an evidence-based guideline (EBG), we aimed to standardize the approach to these patients and reduce the rates of gastrostomy tube placement. METHODS: Between January 2014 and December 2018, we designed and implemented a quality improvement intervention creating an EBG to be used by gastroenterologists evaluating patients ≤2 years of age with respiratory symptoms who were found to aspirate on videofluoroscopic swallow study (VFSS). Our primary aim was to encourage oral feeding and decrease the use of gastrostomy tube placement by 10% within 1 year of EBG initiation; balancing measures included total hospital readmissions or emergency department (ED) visits within 6 months of the abnormal VFSS. RESULTS: A total of 1668 patients (27.2%) were found to have aspiration or penetration noted on an initial VFSS during our initiative. Mean gastrostomy tube placement in these patients was 10.9% at the start of our EBG implementation and fell to 5.2% approximately 1 year after EBG initiation; this improvement was sustained throughout the next 3 years. Our balancing measures of ED visits and hospital readmissions also did not change during this time period. CONCLUSIONS: Through implementation of this EBG, we reduced gastrostomy tube placement by 50% in patients presenting with oropharyngeal dysphagia and aspiration, without increasing subsequent hospital admissions or ED visits.


Assuntos
Medicina Baseada em Evidências , Gastrostomia/instrumentação , Melhoria de Qualidade , Aspiração Respiratória de Conteúdos Gástricos/terapia , Transtornos de Deglutição/complicações , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Gastrostomia/estatística & dados numéricos , Necessidades e Demandas de Serviços de Saúde/estatística & dados numéricos , Hospitalização/estatística & dados numéricos , Humanos , Lactente , Intubação Gastrointestinal/instrumentação , Intubação Gastrointestinal/estatística & dados numéricos , Masculino , Aspiração Respiratória de Conteúdos Gástricos/diagnóstico por imagem , Fatores de Tempo
9.
Glob Pediatr Health ; 6: 2333794X19845923, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31192280

RESUMO

Objective. To describe changes in oral health behaviors following implementation of a nursing intervention targeting children at risk for early childhood caries at an urban 2-site primary care practice. Methods. Nurses used a proprietary Nursing Caries Assessment Tool (N-CAT) to identify behaviors associated with early childhood caries risk, then provided brief focused dental education, fluoride varnish applications, and dental referrals to children without a dental home. We used generalized estimating equation logistic regression models, adjusted for age at visit, to analyze changes in oral health behaviors over time including the following: (1) tooth brushing frequency, (2) use of fluoride toothpaste, and (3) adult help with brushing among children younger than 5 years of age who had at least 2 N-CATs documented during well care visits between April 2013 and June 2015. We also evaluated dietary habits including going to bed with a bottle or sippy cup and sugar-sweetened beverage consumption, as secondary study outcomes during the same time frame. Results. A total of 2097 children with a mean age of 15.8 (SD 7.6) months at the initial visit were included in the analysis; 51% were boys; 28% were black, 36% Hispanic/Latino, 5% white, 2% Asian, and 19% other; 75% were publicly insured. During the study period, significant (P < .05) improvements were noted across the 3 oral health behaviors studied among children younger than 18 months. Conclusion. Nursing interventions show promise for promoting preventive dental care in primary care settings and deserve further study.

10.
BMJ Qual Saf ; 28(7): 588-597, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-30971434

RESUMO

BACKGROUND: Iron deficiency anaemia (IDA) in infancy is prevalent and associated with impaired neurodevelopment; however, studies suggest that treatment and follow-up rates are poor. OBJECTIVES: To improve the rate of ferrous sulfate prescription for suspected IDA among infants aged 8-13 months to 75% or greater within 24 months. METHODS: We implemented a multidisciplinary process improvement effort aimed at standardising treatment for suspected IDA at two academic paediatric primary care clinics. We developed a clinical pathway with screening and treatment recommendations, followed by multiple plan-do-study-act cycles including provider education, targeted reminders when ferrous sulfate was not prescribed and development of standardised procedures for responding to abnormal lab values. We tracked prescription and screening rates using statistical process control charts. In post hoc analyses, we examined rates of haemoglobin (Hgb) recheck and normalisation for the preintervention versus postintervention groups. RESULTS: The prescription rate for suspected IDA increased from 41% to 78% following implementation of the intervention. Common reasons for treatment failure included prescription of a multivitamin instead of ferrous sulfate, and Hgb not flagged as low by the electronic medical record. Screening rates remained stable at 89%. Forty-one per cent of patients with anaemia in the preintervention group had their Hgb rechecked within 6 months, compared with 56% in the postintervention group (p<0.001). Furthermore, 30% of patients with anaemia in the postintervention group had normalised their Hgb by 6 months, compared with 20% in the preintervention group (p<0.05). CONCLUSIONS: A multipronged interdisciplinary quality improvement intervention enabled: (1) development of standardised practices for treating suspected IDA among infants aged 8-13 months, (2) improvement of prescription rates and (3) maintenance of high screening rates. Rates of Hgb recheck and normalisation also increased in the intervention period.​.


Assuntos
Anemia Ferropriva/tratamento farmacológico , Compostos Ferrosos/administração & dosagem , Padrões de Prática Médica , Hospitais Pediátricos , Humanos , Lactente , Comunicação Interdisciplinar , Padrões de Prática Médica/normas , Melhoria de Qualidade
11.
Pediatr Rheumatol Online J ; 17(1): 7, 2019 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-30764840

RESUMO

BACKGROUND: Hemophagocytic lymphohistiocytosis (HLH) and macrophage activation syndrome (MAS) were historically thought to be distinct entities, often managed in isolation. In fact, these conditions are closely related. A collaborative approach, which incorporates expertise from subspecialties that previously treated HLH/MAS independently, is needed. We leveraged quality improvement (QI) techniques in the form of an Evidence-Based Guideline (EBG) to build consensus across disciplines on the diagnosis and treatment of HLH/MAS. METHODS: A multidisciplinary work group was convened that met monthly to develop the HLH/MAS EBG. Literature review and expert opinion were used to develop a management strategy for HLH/MAS. The EBG was implemented, and quality metrics were selected to monitor outcomes. RESULTS: An HLH/MAS clinical team was formed with representatives from subspecialties involved in the care of patients with HLH/MAS. Broad entry criteria for the HLH/MAS EBG were established and included fever and ferritin ≥500 ng/mL. The rheumatology team was identified as the "gate-keeper," charged with overseeing the diagnostic evaluation recommended in the EBG. First-line medications were recommended based on the acuity of illness and risk of concurrent infection. Quality metrics to be tracked prospectively based on time to initiation of treatment and clinical response were selected. CONCLUSION: HLH/MAS are increasingly considered to be a spectrum of related conditions, and joint management across subspecialties could improve patient outcomes. Our experience in creating a multidisciplinary approach to HLH/MAS management can serve as a model for care at other institutions.


Assuntos
Linfo-Histiocitose Hemofagocítica/diagnóstico , Síndrome de Ativação Macrofágica/diagnóstico , Algoritmos , Consenso , Citocinas/sangue , Diagnóstico Diferencial , Medicina Baseada em Evidências/métodos , Humanos , Linfo-Histiocitose Hemofagocítica/terapia , Síndrome de Ativação Macrofágica/terapia , Guias de Prática Clínica como Assunto , Melhoria de Qualidade
12.
Clin Pediatr (Phila) ; 58(3): 307-312, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30461298

RESUMO

There is growing emphasis on using patient-reported outcome measures to enhance clinical practice. This study was a retrospective review of scores on the Childhood Asthma Control Test (C-ACT) and the Pediatric Symptom Checklist-17 (PSC-17) at a pediatric primary care center in Boston, Massachusetts. A total of 218 patients were selected at random using billing codes for well-child (WC) care and asthma, excluding complex medical conditions. Cutoff scores were used to identify uncontrolled asthma (C-ACT ⩽19) and clinically significant psychosocial symptoms (+PSC-17). Multiple logistic regression was used to measure associations between C-ACT ⩽19 and +PSC-17, adjusting for covariates. In multivariable analysis, C-ACT ⩽19 at WC visits was associated with +PSC-17 at WC visits (adjusted odds ratio = 3.2 [95% confidence interval = 1.3-8.6]). C-ACT ⩽19 at non-WC visits was also associated with +PSC-17 at WC visits (adjusted odds ratio = 3.1 [95% confidence interval = 1.2-8.9]). Patient-reported outcome measures of asthma control and psychosocial symptoms were positively correlated in this sample.


Assuntos
Asma/complicações , Asma/psicologia , Transtornos do Comportamento Infantil/complicações , Transtornos do Comportamento Infantil/psicologia , Medidas de Resultados Relatados pelo Paciente , Asma/terapia , Boston , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Estudos Retrospectivos , Inquéritos e Questionários
13.
Eye Contact Lens ; 40(4): 191-9, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24887209

RESUMO

OBJECTIVES: To determine whether Asian and white subjects differ in clinical signs or subjective symptoms in response to the use of different biguanide-preserved contact lens care solutions. METHODS: Forty-two subjects (15 Asian and 27 white) wearing lotrafilcon B silicone hydrogel contact lenses used a preservative-free lens care solution bilaterally for 2 weeks, then used two biguanide-preserved solutions (solution 1: ReNu MPS; solution 2: AQuify MPS) contralaterally in randomly assigned eyes for 4 weeks. Comprehensive ocular surface examinations were performed and symptomatology questionnaires were administered every 2 weeks. Investigators were masked as to solution assignment during examinations, whereas subjects were not to avoid potential difficulties in compliance with the protocol. RESULTS: With solution 1, most Asian and white subjects had grade 2 or greater corneal staining after 2 weeks (67% and 59%, respectively) and 4 weeks (60% and 67%, respectively). With solution 2, grade 2 or greater corneal staining occurred in 40% of Asians after 2 weeks and in 13% after 4 weeks, but in only 4% of whites after 2 weeks and 0% after 4 weeks. Whites reported significantly better average comfort (P=0.046) and less dryness (P<0.001) than did Asians. CONCLUSIONS: Asians and whites differ in both ocular response to the use of contact lens care solutions and in reporting subjective symptoms. Racial and ethnic differences should be considered when evaluating and treating contact lens patients in a clinical setting.


Assuntos
Povo Asiático , Soluções para Lentes de Contato/efeitos adversos , Lentes de Contato de Uso Prolongado , Doenças da Córnea/etnologia , Transtornos da Pigmentação/etnologia , População Branca , Adolescente , Adulto , Biguanidas/efeitos adversos , Doenças da Córnea/induzido quimicamente , Estudos Cross-Over , Método Duplo-Cego , Feminino , Humanos , Hidrogéis , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Transtornos da Pigmentação/induzido quimicamente , Projetos Piloto , Conservantes Farmacêuticos/efeitos adversos , Silicones , Adulto Jovem
14.
IEEE Trans Pattern Anal Mach Intell ; 33(12): 2368-82, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21709305

RESUMO

While there has been a lot of recent work on object recognition and image understanding, the focus has been on carefully establishing mathematical models for images, scenes, and objects. In this paper, we propose a novel, nonparametric approach for object recognition and scene parsing using a new technology we name label transfer. For an input image, our system first retrieves its nearest neighbors from a large database containing fully annotated images. Then, the system establishes dense correspondences between the input image and each of the nearest neighbors using the dense SIFT flow algorithm [28], which aligns two images based on local image structures. Finally, based on the dense scene correspondences obtained from SIFT flow, our system warps the existing annotations and integrates multiple cues in a Markov random field framework to segment and recognize the query image. Promising experimental results have been achieved by our nonparametric scene parsing system on challenging databases. Compared to existing object recognition approaches that require training classifiers or appearance models for each object category, our system is easy to implement, has few parameters, and embeds contextual information naturally in the retrieval/alignment procedure.

15.
IEEE Trans Pattern Anal Mach Intell ; 33(5): 978-94, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-20714019

RESUMO

While image alignment has been studied in different areas of computer vision for decades, aligning images depicting different scenes remains a challenging problem. Analogous to optical flow, where an image is aligned to its temporally adjacent frame, we propose SIFT flow, a method to align an image to its nearest neighbors in a large image corpus containing a variety of scenes. The SIFT flow algorithm consists of matching densely sampled, pixelwise SIFT features between two images while preserving spatial discontinuities. The SIFT features allow robust matching across different scene/object appearances, whereas the discontinuity-preserving spatial model allows matching of objects located at different parts of the scene. Experiments show that the proposed approach robustly aligns complex scene pairs containing significant spatial differences. Based on SIFT flow, we propose an alignment-based large database framework for image analysis and synthesis, where image information is transferred from the nearest neighbors to a query image according to the dense scene correspondence. This framework is demonstrated through concrete applications such as motion field prediction from a single image, motion synthesis via object transfer, satellite image registration, and face recognition.


Assuntos
Algoritmos , Processamento de Imagem Assistida por Computador/métodos , Reconhecimento Automatizado de Padrão/métodos , Humanos , Movimento (Física) , Gravação em Vídeo
16.
Exp Eye Res ; 86(4): 562-75, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18304532

RESUMO

Longitudinal studies of a variety of transgenic mouse models for lens development can create substantial challenges in database management and analysis. We report a novel, automated, feature-based informatics approach to screening lens phenotypes in a large database of slit lamp images. Digital slit lamp images of normal and abnormal lenses in eyes of wild type (wt), SC1 null and SPARC null transgenic mice were recorded for quantitative evaluation of their structural phenotype. The images were processed to improve the contrast of structural features that corresponded to rings of opacity and fluctuations in scattering intensity in the lenses. Measurable attributes were assigned to the features in the lens images and given as an output vector of 46 dimensions. Characteristic patterns were correlated with the structural phenotype of each mutant and wt lens and a statistical fit for each phenotype was defined. The genotype was identified correctly in nearly 85% of the slit lamp images on the basis of an automated computer analysis of the lens structural phenotype. The automated computer algorithm has the potential to evaluate a large database of slit lamp images and distinguish mouse genotypes on the basis of lens phenotypes objectively using a neural network analysis of the structural features observed in the slit lamp images. The neural network approach is a promising technology for objective evaluation of genotype/phenotype relationships based on structural features and light scattering in lenses. Further improvements in the automated method can be expected to simplify and increase the accuracy and efficiency of the feature based analysis of structural phenotypes linked to genetic variation.


Assuntos
Catarata/patologia , Cristalino/anatomia & histologia , Animais , Catarata/genética , Bases de Dados Factuais , Modelos Animais de Doenças , Genótipo , Cristalino/patologia , Informática Médica , Camundongos , Camundongos Transgênicos , Redes Neurais de Computação , Fenótipo , Espalhamento de Radiação
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...