Showing 7 results for Retinopathy
Mahmoodi Mj, Gharooni M, Moradmand S ,
Volume 60, Issue 6 (9-2002)
Abstract
Introduction: Coronary artery disease (CAD) and its complications are the most prevalent etiology of mortality all over the world and diabetes mellitus (DM) is one of its risk factors. In this study prevalence of MI and unstable angina have been compared with different kinds of retinopathy and their severity.
Materials and methods: This study is a descriptive, cross sectional one that performed on 100 patients admitted in Imam, Farabi and Amir Alam Hospitals.
Results: Most important findings are as below: 1) Non-proliferative diabetic retinopathy (NPDR) are more prevalent than proliferative diabetic retinopathy (PDR), 41 Vs 17 cases, and 24 person were normal in MI population. And 12 persons had NPDR and 2 PDR and 5 normal in unstable angina. 2) Different diabetic retinopathy lesion were: 23 Venous dilation, 22 aneurysme, 18 hemorrhagic, 11 neovascularization, 10 macula edema, 6 retroretinal detachment, 2 gliosis. 3) on the point of presence or absence of diabetic retinopathy (DR), 72 percent had some kind of DR and 28 percent had nothing. Finally, in MI population 58 patients (70 percent) had DR and 24 patients (30 percent) didn't have any. In unstable angina 14 patients (77 percent) had diabetic retinopathy and 4 didn't have (23 percent).
Conclusion: Regarding the lack of facilities and shortcoming of necessary data, it was not possible to conduct a prospective investigation in this item, so the design and implementation of a prospective study based on enough cases and controls is strongly recommended.
Shoja Mr, Mahdavi M, Manaviat Mr, Besharati M.r,
Volume 64, Issue 11 (10-2006)
Abstract
Background: Diabetes Mellitus is the most common endocrinologic disease in human and retinopathy is one of the most common complications. Etiology of this complication is yet unknown but one of the factors that can be effective on its production or progression is serum lipid. We aim to study the relationship between different degrees of diabetic retinopathy and serum lipids levels.
Methods: An observational cross-sectional study designed to study over 37 patients with diabetes mellitus type one and 157 patients with diabetes mellitus type two. Former was selected as sensus and latter was selected randomly from diabetic patients attending the diabetes clinic in Yazd during 2002. Inclusion criteria was duration of diabetes at least seven years from diagnosis. Statistical analysis performed by SPSS package edition 11 and wit statistical tests as Chi square, Fisher Exact and ANOVA.
Results: Among 194 cases, 74 cases were males and 120 females. 90 cases (46.4%) have normal total serum cholesterol and 104 (53.6%) hypercholestrolemia. In case of triglyceride 94 cases (48.4%) have normal serum triglyceride and 100 (51.6%) hypertriglyceridemia. Distribution of different degrees of diabetic retinopathy was statistically significant due to cholesterol and triglycerides (P-Value<0.05). In different groups of sex, diabetic retinopathy was more prevalent if there was hypertriglyceridemia or hypercholesterolemia. This was correct about different groups of age and type of diabetes. This means that in different groups of age and type of diabetes, diabetic retinopathy was more prevalent if there was hypertriglyceridemia or hypercholesterolemia.
Conclusion: Prevalence of diabetic retinopathy is higher in cases with hypertriglyceridemia or hypercholesterolemia than cases with normal serum triglyceride or cholesterole.
Malekmadani M H, Lashay A, Behjati M, Ganji R,
Volume 65, Issue 7 (10-2007)
Abstract
Background: The aim of this study was to estimate the prevalence, severity, and risk factors for diabetic retinopathy in diabetic cases admitted for non-ocular diabetic complications and to investigate the association between retinopathy and these complications.
Methods: In this cross-sectional study, 84 diabetic patients admitted to our university-affiliated hospital for non-ocular diabetic complications were fully evaluated for proliferative and nonproliferative diabetic retinopathy. Cases of nonproliferative retinopathy (NPDR) were graded as microaneurysm, mild, moderate or severe. To determine the association of retinopathy with the complications that caused hospitalization, statistical analysis was performed using SPSS ver. 11.5.
Results: The prevalence of diabetic retinopathy among our cases was 77.4% (65 patients), with proliferative diabetic retinopathy (PDR) present in 23 patients (35.4% of the retinopathy cases). Diabetic retinopathy was higher in patients who had been hospitalized for nephropathy than in patients with diabetic foot and diabetic ketoacidosis (DKA, p=0.001), and higher in those hospitalized for diabetic foot than for DKA (p=0.008). Among the 35 patients who had nephropathy and retinopathy, 16 subjects (45.7%) had PDR, and the other 19 subjects had NPDR. Twenty-seven patients had diabetic foot and retinopathy, six (22.7%) of whom had PDR, and 21 (77.8%) had NPDR. Factors significantly related to the occurrence of diabetic retinopathy were type 2 diabetes, presence of hypertension, elevated serum levels of creatinine, duration of diabetes and coexisting nephropathy or diabetic foot (all with p values <0.05). In the logistic regression model, diabetic duration had a slight association with PDR (p=0.06).
Conclusion: Our data suggest that diabetic retinopathy in our patients is common, especially in patients with nephropathy. In addition to glycemic control, lowering of serum cholesterol and triglycerides as well as blood pressure may be effective in lowering the prevalence of diabetic retinopathy.
Askarishahi M, Hajizadeh E, Afkhami-Ardakani M,
Volume 68, Issue 11 (2-2011)
Abstract
Background: Diabetes is a chronic non-communicable disease with increasing prevalence. Retinopathy is one of the main complications of diabetes. Early diagnosis and treatment of retinopathy can reduce the risk of low vision and blindness. The aim of this study was to apply regression analysis of current status data to determine risk factors of diabetic retinopathy in patients with type 2 diabetes being referred to the Ophthalmology Clinic of Yazd Diabetes Research Center, Iran.
Methods: In this analytical-observational study, 459 patients with type 2 diabetes were enrolled in the study and the ophthalmic examinations done by an ophthalmologist included visual acuity, intraocular pressure (IOP) measurement and slit-lamp examination. After pupil dilatation, funduscopy was done and the patients were classified according to ETDRS criteria. A proportional hazard model for current status data was used to identify the risk factors for retinopathy.
Results: The hazard rate of having retinopathy increased by 5% for an increase of one year in the duration of diabetes (p<0.05) and the hazard rate of having retinopathy was 1.1 times greater in patients who had used insulin for diabetes compared with other type 2 diabetes patients (p<0.05).
Conclusion: This study showed that a history of hypertension may reduce the risks of diabetic retinopathy. In patients with the early diagnosis of diabetes, regular examination of the fundus, blood sugar control and tight control of high blood pressure are recommended.
Naroi Nejad Minoo , Yousefi Maryam, Nazari Hossein, Ghasempoor Adel,
Volume 70, Issue 3 (6-2012)
Abstract
Background: Microangiopathy and macroangiopathy frequently coexist in type 2 diabetes mellitus (T2DM). Both types of the vascular complications share traditional risk factors but it is not clear whether the presence of microangiopathy, such as diabetic retinopathy, constitutes a predictor of atherosclerosis in carotid arteries in patients with the disease. In this study we looked for the association between diabetic retinopathy and intima-media thickness in carotid arteries of patients with T2DM.
Methods: In this case-control study we examined 100 consecutive patients with T2DM in Rasoul Akram Hospital in Tehran, Iran during 2009-2010. We assessed intima-media thickness of carotid arteries by ultrasonography. All patients underwent ophthalmo-logic examination.
Results: Diabetic retinopathy was found in 50 (50%) patients. Intima-media thickness was higher in patients with diabetic retinopathy than those without it (0.77±0.17 mm vs. 0.71±0.2 mm, respectively, P=0.041). Moreover, intima-media thickness was more prevalent in patients with proliferative diabetic retinopathy than patients with non-proliferative form of the disease (0.87±0.16 mm vs. 0.68±0.1 mm, respectively, P<0.001).
Conclusion: Diabetic retinopathy seems to be associated with increased intima-media thickness of carotid arteries in T2DM. It may be a common denominator of pathogene-sis of microvascular complications and atherosclerosis in T2DM. Evaluations of carotid arteries are to be done by non-invasive methods such as color Doppler sonography for screening and preventing prospective cereberovascular accidents in patients with diabetic retinopathy, especially proliferative retinopathy, in routine ophthalmological examination of patients with T2DM.
Mousa Ahmadpour-Kacho, Yadollah Zahed Pasha, Seyed Ahmad Rasoulinejad, Mahmoud Hajiahmadi, Parisa Pourdad ,
Volume 72, Issue 6 (9-2014)
Abstract
Background: Several risk factors like prematurity, hyperoxia, hyperglycemia, duration of mechanical ventilation and supplemental oxygen use have been attributed to the occurrence of retinopathy of prematurity (ROP) in low birth weight infants. Clinical Risk Index for Babies (CRIB) score have been used to assess the severity of the newborn's disease and neonatal mortality. The relation between the CRIB score and the incidence of retinopathy of prematurity is less assessed. This study was carried out to determine the relation between the CRIB score and retinopathy of prematurity in preterm infants.
Methods: In a cross-sectional study all preterm infants admitted to NICU from March 2009 to November 2012, with a birth weight less than 1500 grams and gestational age less than 28 weeks and other premature infants with birth weight 1500 to 2000 grams and gestational age 29 to 34 weeks with an unstable clinical condition, were included. The CRIB score was recorded in firs 12 hours of admission to the NICU. Ophthalmologic examination was done by a retinologist unaware of CRIB score. ROP classification was done according to the international classification of ROP. The CRIB score compared with presence or non-presence of ROP and its stage, progression or regression of disease. A P-value less than 0.05 are considered significant.
Results: One hundred and eighty (70%) neonates out of 256 neonates developed ROP. In 124 (68.88%) neonates it resolved spontaneously on serial ophthalmologic examination, but fifty-six (31.11%) neonates were required treatment for ROP which 42 (75%) received Avastin and 14 (25%) neonates treated with Laser.
The Mean±SD for CRIB score in ROP group was 4.79±2.74 and in a group without ROP it was 3.78±2.00 (P=0.004). No correlation was found between the severity of ROP and CRIB score (P=0.152).
Conclusion: The CRIB score can predict the occurrence of ROP, but can't predict its severity and progression or regression.
Hossein Ghayoumi Zadeh, Mostafa Danaeian, Ali Fayazi , Farshad Namdari, Sayed Mohammad Mostafavi Isfahani ,
Volume 76, Issue 1 (4-2018)
Abstract
Background: One common symptom of diabetes is diabetic retinopathy, if not timely diagnosed and treated, leads to blindness. Retinal image analysis has been currently adopted to diagnose retinopathy. In this study, a model of hierarchical self-organized neural networks has been presented for the detection and classification of retina in diabetic patients.
Methods: This study is a retrospective cross-sectional, conducted from December to February 2015 at the AJA University of Medical Sciences, Tehran. The study has been conducted on the MESSIDOR base, which included 1200 images from the posterior pole of the eye. Retinal images are classified into 3 categories: mild, moderate and severe. A system consisting of a new hybrid classification of SOM has been presented for the detection of retina lesions. The proposed system includes rapid preprocessing, extraction of lesions features, and finally provision of a classification model. In the preprocessing, the system is composed of three processes of primary separation of target lesions, separation of the optical disk, and separation of blood vessels from the retina. The second step is a collection of features based on various descriptions, such as morphology, color, light intensity, and moments. The classification includes a model of hierarchical self-organized networks named HSOM which is proposed to accelerate and increase the accuracy of lesions classification considering the high volume of information in the feature extraction.
Results: The sensitivity, specificity and accuracy of the proposed model for the classification of diabetic retinopathy lesions is 98.9%, 96.77%, 97.87%, respectively.
Conclusion: These days, the cases of diabetes with hypertension are constantly increasing, and one of the main adverse effects of this disease is related to eyes. In this respect, the diagnosis of retinopathy, which is the same as identification of exudates, microanurysm and bleeding, is of particular importance. The results show that the proposed model is able to detect lesions in diabetic retinopathy images and classify them with an acceptable accuracy. In addition, the results suggest that this method has an acceptable performance compared to other methods.
