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1.
Nurse Educ ; 49(2): E62-E67, 2024.
Article in English | MEDLINE | ID: mdl-37657119

ABSTRACT

BACKGROUND: Many Americans are undecided about or have barriers to receiving vaccines. Complacency, confidence, convenience, misinformation, and disinformation impact vaccine hesitancy (VH). PROBLEM: During the COVID-19 pandemic, rates for flu and routine childhood vaccinations declined globally. As vaccination rates decline, the risk of disease outbreaks increases. Nursing students need to be prepared to address VH in the clinical setting. APPROACH: Four simulation experiences were developed to build confidence and competency in the provision of vaccinations and addressing VH. Nursing students practiced communication skills critical to motivational interviewing, health education, health promotion, and goal setting. OUTCOME: There were statistically significant increases in student confidence and perceived competence in vaccine administration and addressing VH through motivational interviewing. CONCLUSIONS: High-fidelity simulation combined with a virtual simulation was effective in developing confidence among nursing students. Students demonstrated skill in addressing VH and motivational interviewing.


Subject(s)
Motivational Interviewing , Students, Nursing , Humans , Vaccination Hesitancy , Pandemics , Nursing Education Research
2.
Nurse Educ Today ; 126: 105822, 2023 Jul.
Article in English | MEDLINE | ID: mdl-37182275

ABSTRACT

BACKGROUND: People with disabilities (PWD) constitute 26 % of the U.S. population yet no nursing schools have compulsory clinical education specific to PWD. Inadequate education and negative attitudes lead to lack of preparedness for working with PWD. To meet the needs of this highly underserved population, nursing students need training and experience in the care of PWD. OBJECTIVE: The objective of this paper is to report three themes from the qualitative evaluation of two immersive clinical experiences with PWD for undergraduate nursing students designed to evaluate competencies for working with PWD. DESIGN: Curriculum evaluation using qualitative methods. METHODOLOGY: During and after the clinical experience, qualitative data (reflection papers, debriefing responses, and group interviews) were collected with a volunteer sample of senior nursing student participants of the clinical experiences with PWD. Thematic analysis was used to identify changes in students' attitudes, perceived competence, and motivation for working with PWD. FINDINGS: Three major themes are reported in this paper: A positive shift in perspective of PWD (attitudes), impact of the experience on students' practice with PWD (comfort, confidence, awareness and motivation), and revelations from the experience (attitudes and resource awareness). CONCLUSIONS: A comprehensive immersive clinical experience caring for PWD provides a real-world laboratory with important experiential learning activities that help students acquire and apply knowledge about the healthcare needs of PWD. Reflection activities facilitate synthesis of that knowledge. Results from this study suggest that this clinical experience can transform students' attitudes toward PWD, enhance their clinical skills, and motivate them to consider a nursing career with this highly under-served population.


Subject(s)
Disabled Persons , Education, Nursing, Baccalaureate , Students, Nursing , Humans , Education, Nursing, Baccalaureate/methods , Delivery of Health Care , Power, Psychological
3.
Nurse Educ ; 48(3): 137-141, 2023.
Article in English | MEDLINE | ID: mdl-36729930

ABSTRACT

BACKGROUND: The impact of social determinants of health (SDOH) was developed to educate nursing students through the use of an unfolding case study. PROBLEM: SDOH and population health are critical components of prelicensure nursing education. Unfolding case studies are a strategy to develop critical thinking and teach SDOH to nursing students. APPROACH: A model was used to develop the case study including a community assessment, which follows a male veteran and family through life events. Implementation of the unfolding case study took place over 3 consecutive semesters in a community health nursing course. OUTCOMES: This educational activity achieved standardized examination scores, which are intended to assess student preparedness for the National Council Licensure Examination (NCLEX), above the national averages. Student participation was above 90%. CONCLUSION: Unfolding case studies can present realistic scenarios that are useful to teach critical thinking. As the Next Generation NCLEX moves to scenario-based testing, unfolding case studies are a teaching strategy to prepare students.


Subject(s)
Education, Nursing, Baccalaureate , Education, Nursing , Students, Nursing , Humans , Male , Social Determinants of Health , Nursing Education Research , Educational Measurement , Licensure, Nursing
4.
J Am Coll Surg ; 236(3): 461-467, 2023 03 01.
Article in English | MEDLINE | ID: mdl-36408977

ABSTRACT

BACKGROUND: Although evidence suggests that racial and ethnic minority (REM) patients receive inadequate pain management in the acute care setting, it remains unclear whether these disparities also occur during the prehospital period. The aim of this study is to assess the impact of race and ethnicity on prehospital analgesic use by emergency medical services (EMS) in trauma patients. STUDY DESIGN: Retrospective chart review of adult trauma patients aged 18 to 89 years old transported by EMS to our American College of Surgeons-verified level 1 trauma center from 2014 to 2020. Patients who identified as Black, Asian, Native American, or Other for race and/or Hispanic or Latino or Unknown for ethnicity were considered REM. Patients who identified as White, non-Hispanic were considered White. Groups were compared in univariate and multivariate analysis. The primary outcome was prehospital analgesic administration. RESULTS: A total of 2,476 patients were transported by EMS (47% White and 53% REM). White patients were older on average (46 years vs 38 years; p < 0.001) and had higher rates of blunt trauma (76% vs 60%; p < 0.001). There were no differences in Injury Severity Score (21 vs 20; p = 0.22). Although REM patients reported higher subjective pain rating (7.2 vs 6.6; p = 0.002), they were less likely to get prehospital pain medication (24% vs 35%; p < 0.001), and that difference remained significant after controlling for baseline characteristics, transport method, pain rating, prehospital hypotension, and payor status (adjusted odds ratio [95% CI], 0.67 [0.47 to 0.96]; p = 0.03). CONCLUSIONS: Patients from racial and ethnic minority groups were less likely to receive prehospital pain medication after traumatic injury than White patients. Forms of conscious and unconscious bias contributing to this inequity need to be identified and addressed.


Subject(s)
Emergency Medical Services , Ethnicity , Adult , Humans , Adolescent , Young Adult , Middle Aged , Aged , Aged, 80 and over , Pain Management , Retrospective Studies , Minority Groups , Analgesics/therapeutic use , Pain/drug therapy
5.
Nurse Educ Pract ; 61: 103330, 2022 May.
Article in English | MEDLINE | ID: mdl-35316666

ABSTRACT

AIM: This study aimed to examine if participation in a required clinical course or elective fellowship pertaining to care of people with disabilities (PWD) had an impact on attitudes, knowledge and skills of nursing when compared with those with no clinical exposure to PWD. BACKGROUND: Worldwide, over 1 billion people live with a disability, 93 million are children and an estimated 1-3% have an intellectual disability; 6.9 billion live with 'impairment producing health condition'. (WHO, 2011; Maulik et al., 2011; Roscigno, 2013 p.21). Barriers that contribute to health disparities in PWD are numerous; repeated themes of inadequate education of nursing students and faculty, deficient communication skills and negative attitudes are pervasive in the literature (Alshammari et al., 2018; Anyinam et al., 2019; Cervasio et al., 2010; Ilkhani et al., 2015; Lyon & Houser, 2018; Polikandrioti et al., 2020; Temple & Murdoch, 2012; Werner & Grayzman, 2011; WHO, 2011). STUDY DESIGN: A singular institution descriptive quantitative design using a purposive sample of student volunteers explored differences among pre-licensure senior nursing students which examined perceptions prior to and following a clinical experience specific to the care of PWD. METHODS: Analyses of the change in scale scores by student type and experience working with PWD were evaluated using one-way ANOVA. Spearman correlations were used to test for an association between the change in scale scores and birth year. RESULTS: There was no statistical evidence of differences between the elective fellowship (n = 9), clinical (n = 13), or control (n = 24) groups for change in attitudes (p = 0.1383), scenario 1 (p = 0.1996), or knowledge scores (p = 0.2854) (Table 3). Mean pre- and post-test scores for attitudes within the fellowship (69.78, 75.11) and clinical (67.62, 74) group increased more than the control (66.92, 68.29). There was evidence of a difference detected in the attitude questions, scenario 2 scores, with the fellowship and clinical groups showing a larger increase in scores compared with the control group (p < 0.0001) (Table 3). Also, the clinical group experienced a larger increase in skill scores compared with the control group (p = 0.0154). CONCLUSIONS: Results from pre-post surveys exemplify the need for disability specific undergraduate education. Students will experience confidence and competence in their transition to practice because at anytime, anywhere, they will encounter someone with a disability. Further research is needed to determine the amount and type of education that translates to quality care of PWD.


Subject(s)
Disabled Persons , Education, Nursing, Baccalaureate , Students, Nursing , Attitude , Child , Education, Nursing, Baccalaureate/methods , Health Knowledge, Attitudes, Practice , Humans , Surveys and Questionnaires
6.
7.
Nurs Educ Perspect ; 43(4): 255-257, 2022.
Article in English | MEDLINE | ID: mdl-34405843

ABSTRACT

ABSTRACT: People with disabilities (PWD) have reported that health care workers' negative attitudes are among the most significant barriers to accessing health care services. PWD constitute one quarter of the population, yet the curriculum for PWD is inconsistent. This study describes a curriculum intervention allowing student interaction with a panel of PWD to change nursing student attitudes. Surveys were administered before and after the intervention. Our pilot study did not reveal a significant change in attitudes, which suggests that more exposure to PWD and education may be needed.


Subject(s)
Disabled Persons , Students, Nursing , Attitude of Health Personnel , Curriculum , Humans , Pilot Projects , Surveys and Questionnaires
8.
J Minim Invasive Gynecol ; 29(4): 528-534, 2022 04.
Article in English | MEDLINE | ID: mdl-34929399

ABSTRACT

STUDY OBJECTIVE: To determine whether a change in lateral accessory port (LAP) size from 10-"?>12 mm to 8 mm among women undergoing laparoscopic native tissue pelvic organ prolapse (POP) surgery was effective at reducing opioid use after surgery. DESIGN: Prospective cohort of women taking part in a POP surgical registry. SETTING: Tertiary academic hospital in Calgary, Canada. PATIENTS: Women undergoing laparoscopic uterosacral ligament apical suspensions for stage ≥2 POP with either uterine preservation or concomitant hysterectomy. A total of 92 women were included during a 15-month study period from June 2020 and September 2021. INTERVENTIONS: Laparoscopic apical suspension using either a 10-"?>12 mm or 8 mm LAP, with the change occurring at the midpoint of the study period. Fascial defects from 10-"?>12 mm ports were closed with a fascial closure device. Perioperative care and technique were otherwise unchanged. MEASUREMENTS AND MAIN RESULTS: Postoperative opioid use was measured by mean morphine equivalent daily dose, accounting for all oral and intravenous opioids used in the first 24 hours after surgery. A total of 50 cases (54.3%) used a 10-12 mm LAP, and 42 cases (45.7%) used an 8 mm LAP. Mean morphine equivalent daily dose after surgery with a 10-12 mm LAP was significantly higher than with an 8 mm LAP (35.3 [95% confidence interval (CI) 24.9-45.6] vs 13.6 [95% CI 8.0-19.2], p <.001). The proportion of women who did not require opioids postoperatively was higher in the 8 mm group (45.2%, n = 19) than the 10-12 mm group (18.0%, n = 9) (crude odds ratio 3.76, 95% CI 1.47-9.66). Similarly, the proportion of women who did not fill an opioid prescription after discharge was higher in the 8 mm group (35.7%, n = 15) than the 10-12 mm group (16.0%, n = 8) (crude odds ratio 2.92, 95% CI 1.09-7.81). These results remained statistically significant after adjustment for age, body mass index, race and ethnicity, length of procedure, and concomitant procedures performed. CONCLUSION: Compared with a 10-12 mm port, the use of an 8 mm LAP during laparoscopic native tissue apical POP surgery is associated with decreased opioid use in the first 24 hours after surgery.


Subject(s)
Laparoscopy , Opioid-Related Disorders , Pelvic Organ Prolapse , Analgesics, Opioid/therapeutic use , Female , Gynecologic Surgical Procedures/methods , Humans , Laparoscopy/methods , Morphine , Pelvic Organ Prolapse/surgery , Prospective Studies
9.
J Nurs Educ ; 60(11): 637-641, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34723735

ABSTRACT

BACKGROUND: Multiple organizations have urged inclusion of disability content in health care professional's education and training. Few nursing schools in the United States have adopted dedicated disability curricula nor studied its impact on attitudes, knowledge, and skills of disability education. Evidence suggests that inadequate education contributes to health care disparities and unmet needs of people with disabilities. METHOD: A 2-hour cocurricular clinical experience was developed, using established competencies, and offered to senior nursing students. Students participated in multimodal experiences, with an emphasis on clinical exposure in various facilities serving children and adults with disabilities. RESULTS: Five cohorts of students (N = 34) participated in the fellowship. Data illustrate the strong need to continue and require the curricula. CONCLUSION: Faculty should develop disability education secondary to population prevalence and in accordance with the American Association of Colleges of Nursing's essential competencies. [J Nurs Educ. 2021;60(11):637-641.].


Subject(s)
Disabled Persons , Students, Nursing , Adult , Attitude , Child , Curriculum , Humans , Schools, Nursing , United States
10.
Creat Nurs ; 27(3): 195-200, 2021 Aug 01.
Article in English | MEDLINE | ID: mdl-34493641

ABSTRACT

BACKGROUND: People with intellectual disabilities experience barriers regarding sexual health education. Nursing education insufficiently addresses the care of people with disabilities. Sexual health promotion is a teaching opportunity for nursing students. OBJECTIVE: Nursing students aimed to improve sexual health literacy among people with intellectual disabilities through educational seminars. RESULTS: Gender-matched group education conducted for people with intellectual disabilities in their home setting enhanced sexual health literacy. DISCUSSION/CONCLUSIONS: People with intellectual disabilities are at risk for sexual abuse and may possess insufficient information compared to their peers without disabilities. Sexual health promotion education for people with intellectual disabilities should occur on a regular basis.


Subject(s)
Disabled Persons , Intellectual Disability , Students, Nursing , Health Promotion , Humans , Peer Group
11.
Int J Nurs Educ Scholarsh ; 18(1)2021 Jul 14.
Article in English | MEDLINE | ID: mdl-34260832

ABSTRACT

Worldwide, more than one billion people live with a disability (World Health Organization. (2011). World report on disability. Retrieved from https://www.who.int/disabilities/world_report/2011/report/en/). People with a disability (PWD) have unmet needs with the delivery of health care, secondary to nursing student's negative attitudes, knowledge, and skill deficits. This integrative literature review evaluated nursing student's education and attitudes towards PWD. Deficient education, attitudes, knowledge, and skills are addressed. Combined search terms utilized included: healthcare students; healthcare education; nursing students; clinical experience; clinical rotation; attitude of health care students; and exposure to PWD. Thirty articles were analyzed with common themes identified. Educational methods that produced improved attitudes, knowledge and skills included standardized patients with disabilities; phenomenological approaches; curriculum enhancement; empathy exercises and clinical experiences (Anderson, E. S., Ford, J., & Thorpe, L. (2011). Learning to listen: Improving students' communication with disabled people. Medical Teacher, 33(1), 44-52. doi: 10.3109/0142159X.2010.498491; Castro, S. S., Rowe, M., Andrade, L. F., & Cyrino, E. G. (2018). Developing competencies among health professions students related to the care of people with disabilities: A pilot study. Interface: Comunicacao, Saude, Educacao, 22(65), 551-563. doi: 10.1590/1807-57622016.0684; Hensel, D., Malinowski, C., & Watts, P. A. (2015). Implementing a pediatric camp clinical for pre-licensure education. Nursing Education Perspectives, 36(1), 60-61. doi: 10.5480/12-871.1; Levett-Jones, T., Lapkin, S., Govind, N., Pich, J., Hoffman, K., Jeong, S. Y., . . . Everson, N. (2017). Measuring the impact of a 'point of view' disability simulation on nursing students' empathy using the comprehensive state empathy scale. Nurse Education Today, 59, 75-81. doi: 10.1016/j.nedt.2017.09.007; Smith, P., Ooms, A., & Marks-Maran, D. (2016). Active involvement of learning disabilities service users in the development and delivery of a teaching session to pre-registration nurses: Students' perspectives. Nurse Education in Practice, 16(1), 111-118. doi: 10.1016/j.nepr.2015.09.010). Nursing schools must incorporate disability education to fully realize its impact and eliminate barriers to transform care.


Subject(s)
Disabled Persons , Students, Nursing , Attitude of Health Personnel , Child , Curriculum , Humans , Pilot Projects
12.
Nurs Forum ; 56(3): 630-634, 2021 Jul.
Article in English | MEDLINE | ID: mdl-33895993

ABSTRACT

BACKGROUND: Healthcare's rapid evolution has increased focus on doctoral nursing education and expanded experiential immersion opportunities created through innovative academic-community partnerships. METHODS: A partnership between an academic institution and a state board of nursing was formed to provide two Doctorate of Nursing Practice (DNP) students with a fellowship opportunity to learn health policy, strategy, and systems thinking which culminated in participation in a state-wide collaborative and published report. RESULTS: Practicum experience outcomes consisted of learner comprehension of DNP Essential II as evidenced by attendance at health policy meetings, participation in state-wide Summit planning meetings with community partners and Summit participation, facilitation and follow-up report contribution. CONCLUSIONS: Providing students with a practicum experience based on the DNP essentials promotes a curriculum based on scholarly evidence to assure the DNP will be competent to face current demands in healthcare. Experiential learning provides a framework for the DNP to fulfill curriculum while applying skills learned in a real-world environment.


Subject(s)
Education, Nursing, Graduate , Education, Nursing , Students, Nursing , Curriculum , Humans , Policy
14.
Transl Psychiatry ; 10(1): 363, 2020 10 27.
Article in English | MEDLINE | ID: mdl-33110066

ABSTRACT

Inhibition of the angiotensin type 1 receptor (AT1R) has been shown to decrease fear responses in both humans and rodents. These effects are attributed to modulation of extinction learning, however the contribution of AT1R to alternative memory processes remains unclear. Using classic Pavlovian conditioning combined with radiotelemetry and whole-genome RNA sequencing, we evaluated the effects of the AT1R antagonist losartan on fear memory reconsolidation. Following the retrieval of conditioned auditory fear memory, animals were given a single intraperitoneal injection of losartan or saline. In response to the conditioned stimulus (CS), losartan-treated animals exhibited significantly less freezing at 24 h and 1 week; an effect that was dependent upon memory reactivation and independent of conditioned cardiovascular reactivity. Using an unbiased whole-genome RNA sequencing approach, transcriptomic analysis of the basolateral amygdala (BLA) identified losartan-dependent differences in gene expression during the reconsolidation phase. These findings demonstrate that post-retrieval losartan modifies behavioral and transcriptomic markers of conditioned fear memory, supporting an important regulatory role for this receptor in reconsolidation and as a potential pharmacotherapeutic target for maladaptive fear disorders such as PTSD.


Subject(s)
Amygdala , Receptor, Angiotensin, Type 1 , Animals , Conditioning, Classical , Extinction, Psychological , Fear , Memory
15.
J Obstet Gynaecol Can ; 42(11): 1323-1329.e4, 2020 Nov.
Article in English | MEDLINE | ID: mdl-32912727

ABSTRACT

OBJECTIVE: Residents have a professional obligation with respect to the stewardship of health care resources, yet there is a paucity of research on how to improve residents' cost-awareness. Rising health care expenditures highlight a critical need to improve education related to this competency. This study aimed to test if an educational module can teach residents to make cost-conscious decisions and reduce health care spending. METHODS: All Canadian obstetrics and gynaecology residents in 2017 were eligible to participate in this randomized controlled trial. The study was administered online via REDCap. Interested residents were enrolled, stratified by level of training, and block randomized. Residents completed a survey to determine their management of 4 obstetrical scenarios. The intervention group reviewed an educational module on cost-effective ordering prior to completing the survey; the control group was given the option to review the module afterward. The primary outcome was mean total expenditures, compared between the 2 groups using the t test. RESULTS: Eighty-five residents were enrolled between August and November 2017, and 63 residents from 13 Canadian residency programs completed the study requirements (33 control and 30 intervention). Mean total expenditure was CAD$291.03 (95% CI 259.38-322.68) versus CAD$192.98 (95% CI 170.67-215.29) for the control and intervention groups, respectively. These figures corresponded to a 33.69% or CAD$98.05 reduction in total expenditures (P = 0.0001). CONCLUSION: This educational module decreased expenditures by Canadian obstetrics and gynaecology residents managing hypothetical obstetrical cases. This introduces a potential curriculum innovation to improve resident education in judicious use of health care resources.


Subject(s)
Gynecology/education , Health Care Costs , Internship and Residency , Obstetrics/education , Adult , Canada , Clinical Competence , Cost-Benefit Analysis , Curriculum , Female , Health Resources , Humans , Male , Pregnancy , Resource Allocation
16.
Langmuir ; 35(43): 13880-13892, 2019 10 29.
Article in English | MEDLINE | ID: mdl-31573205

ABSTRACT

Predicting and controlling the properties of amphiphile aggregate mixtures require understanding the arrangements and dynamics of the constituent molecules. To explore these topics, we study molecular arrangements and dynamics in alkyl ethoxylate nonionic surfactant micelles by combining NMR relaxation measurements with large-scale atomistic molecular dynamics simulations. We calculate parameters that determine relaxation rates directly from simulated trajectories, without introducing specific functional forms to describe the dynamics. NMR relaxation rates, which depend on relative motions of interacting atom pairs, are influenced by wide distributions of dynamic time scales. We find that relative motions of neighboring atom pairs are rapid and liquidlike but are subject to structural constraints imposed by micelle morphology. Relative motions of distant atom pairs are slower than nearby atom pairs because changes in distances and angles are smaller when the moving atoms are further apart. Large numbers of atom pairs undergoing these slow relative motions contribute to predominantly negative cross-relaxation rates. For spherical micelles, but not for cylindrical micelles, cross-relaxation rates are positive only for surfactant tail atoms connected to the hydrophilic headgroup. This effect is related to the lower packing density of these atoms at the hydrophilic-hydrophobic boundary in spherical vs cylindrical arrangements, with correspondingly rapid and less constrained motion of atoms at the boundary.

17.
Transl Vis Sci Technol ; 4(1): 5, 2015 Jan.
Article in English | MEDLINE | ID: mdl-25635237

ABSTRACT

PURPOSE: To evaluate the reproducibility of central subfield thickness (CST) and volume measurements from optical coherence tomography (OCT) images obtained with Zeiss Stratus and Optovue RTVue, and formulate equations to convert these measurements from RTVue to 'equivalent' Stratus values. METHODS: Cross-sectional observational study from 309 eyes of 167 participants with diabetes and at least one eye with central-involved diabetic macular edema (DME; Stratus CST ≥ 250 µm) that underwent two replicate Stratus scans followed by two replicate RTVue scans centered on the fovea. RESULTS: The Bland-Altman coefficient of repeatability for relative change in CST (the degree of change that could be expected from measurement variability) was not significantly different on Stratus and RTVue scans (10% and 16%, respectively). The replicate Stratus CST was within 10% of the initial Stratus measurement 93% of the time; the CST conversion equation predicted a Stratus value calculated from the observed RTVue value within 10% of the observed Stratus thickness 91% of the time. Bland-Altman limit of agreement for relative change in CST between measurements observed on different machines was 23%, comparing predicted versus actual Stratus measurement. CONCLUSIONS: RTVue thickness reproducibility appears similar to Stratus. Conversion equations to transform RTVue measurements to Stratus-equivalent values within 10% of the observed Stratus RT are feasible. CST changes greater than 10% when using the same machine or 20% when switching from Stratus to RTVue, after conversion to Stratus equivalents, are likely due to a true change beyond measurement error. TRANSLATIONAL RELEVANCE: Conversion equations to translate central retinal thickness measurements between OCT instruments is critical to clinical trials.

18.
JAMA Ophthalmol ; 132(9): 1113-22, 2014 Sep.
Article in English | MEDLINE | ID: mdl-25058482

ABSTRACT

IMPORTANCE: Understanding measurement variability and relationships between measurements obtained on different optical coherence tomography (OCT) machines is critical for clinical trials and clinical settings. OBJECTIVE: To evaluate the reproducibility of retinal thickness measurements from OCT images obtained by time-domain (TD) (Stratus; Carl Zeiss Meditec) and spectral-domain (SD) (Cirrus; Carl Zeiss Meditec, and Spectralis; Heidelberg Engineering) instruments and formulate equations to convert retinal thickness measurements from SD-OCT to equivalent values on TD-OCT. DESIGN, SETTING, AND PARTICIPANTS: A cross-sectional observational study was conducted in private and institutional practices. Persons with diabetes mellitus who had at least 1 eye with central-involved diabetic macular edema, defined as Stratus central subfield thickness (CST) of 250 µm or greater, participated. An additional normative cohort (individuals with diabetes but without diabetic macular edema) was enrolled. Each study eye underwent 2 replicate Stratus scans followed by 2 replicate Cirrus or Spectralis scans (real-time image registration used) centered on the fovea. MAIN OUTCOMES AND MEASURES: Optical coherence tomography CST and macular volume. RESULTS: The Bland-Altman coefficient of repeatability for relative change in CST (the degree of change that could be expected from measurement variability) was lower with Spectralis (7%) compared with Cirrus (14%) and Stratus (12% and 15% within Cirrus/Stratus and Spectralis/Stratus groups, respectively). For each cohort, the initial Stratus CST was within 10% of the replicate Stratus measurement nearly all of the time; the conversion equations predicted a Stratus CST within 10% of the observed thickness 86% and 89% of the time for Cirrus/Stratus and Spectralis/Stratus groups, respectively, which is similar to the agreement on Stratus test-retest. The Bland-Altman limits of agreement for relative change in CST between machines (the degree of change that could be expected from measurement variability [combining within and between instrument variability]) were 21% for Cirrus and 19% for Spectralis when comparing predicted vs actual Stratus measurement. CONCLUSIONS AND RELEVANCE: Reproducibility appears to be better with Spectralis than with Cirrus and Stratus. Conversion equations to transform Cirrus or Spectralis measurements to Stratus-equivalent values, within 10% of the observed Stratus thickness values, appear feasible. Central subfield thickness changes beyond 10% when using the same machine or 20% when switching machines, after conversion to Stratus equivalents, are likely due to a change in retinal thickness rather than measurement error.


Subject(s)
Diabetic Retinopathy/diagnosis , Macular Edema/diagnosis , Retina/pathology , Tomography, Optical Coherence/instrumentation , Adult , Algorithms , Cross-Sectional Studies , Diabetes Mellitus, Type 1/diagnosis , Diabetes Mellitus, Type 2/diagnosis , Female , Humans , Male , Reproducibility of Results
19.
Invest Ophthalmol Vis Sci ; 53(13): 8154-61, 2012 Dec 13.
Article in English | MEDLINE | ID: mdl-23132803

ABSTRACT

PURPOSE: To evaluate macular thickness in people with diabetes but minimal or no retinopathy using Heidelberg Spectralis optical coherence tomography (OCT). METHODS: In a multicenter, cross-sectional study of mean retinal thickness, on Spectralis OCT in the nine standard OCT subfields, spanning a zone with 6-mm diameter, center point, and total retinal volume were evaluated. Central subfield (CSF) thickness was evaluated for association with demographic and clinical factors. Stratus OCT scans also were performed on each participant. RESULTS: The analysis included 122 eyes (122 participants) with diabetes and no (n = 103) or minimal diabetic retinopathy (n = 19) and no macular retinal thickening on clinical exam. Average CSF thickness was 270 ± 24 µm. Central subfield thickness was significantly greater in males relative to females (mean 278 ± 23 µm vs. 262 ± 22 µm, P < 0.001). After adjusting for gender, no additional factors were found to be significantly associated with CSF thickness (P > 0.10). Mean Stratus OCT CSF thickness was 199 ± 24 µm. CONCLUSIONS: Mean CSF thickness is approximately 70 µm thicker when measured with Heidelberg Spectralis OCT as compared with Stratus OCT among individuals with diabetes in the absence of retinopathy or with minimal nonproliferative retinopathy and a normal macular architecture. CSF thickness values ≥ 320 µm for males and 305 µm for females (~2 SDs above the average for this normative cohort) are proposed as gender-specific thickness levels to have reasonable certainty that diabetic macular edema involving the CSF is present using Spectralis measurements.


Subject(s)
Diabetic Retinopathy/diagnosis , Macular Edema/diagnosis , Retina/pathology , Tomography, Optical Coherence , Adult , Aged , Aged, 80 and over , Cross-Sectional Studies , Diabetes Mellitus, Type 1/complications , Diabetes Mellitus, Type 2/complications , Diabetic Retinopathy/classification , Female , Humans , Macular Edema/classification , Male , Middle Aged , Organ Size , Sex Factors , Young Adult
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