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Biomedical subjects

J Barbosa

Publications and source records attributed to J Barbosa.

At least 199 records · Page 11Linked to original sources
PubMedDate not supplied

The Minnesota diabetes complications clinical trial. The first three years.

A prospective and randomized clinical trial of an inception cohort of diabetic kidney recipients to test the hypothesis that maximized metabolic control of diabetes prevents or delays diabetic nephropathy in the renal allografts was initiated approximately three years ago. Notwithstanding the fact that all our diabetic patients were on prednisone and therefore metabolically unstable, we achieved and maintained a clear difference between the standard control (group A) and the maximized control patients (group B). At 13 months of study, the mean fasting blood glucose mg% (A: 242 +/- 22, B: 130 +/- 9, p less than 0.001), nonfasting blood glucose (A: 276 +/- 40, B: 135 +/- 10, p less than 0.001), 24 hour urine glucose (A: 85 +/- 16, B: 5 +/- 1, p less than 0.001), and glycosylated hemoglobin % (A: 13 +/- 0.9, B: 10 +/- 0.8, p less than 0.01) were all clearly and statistically significantly higher for the group A patients. These results show the feasibility of such a trial using the tools available today to treat diabetes.

Aftercare↗
PubMedDate not supplied

Post-war Kosovo: Part 2. Assessment of emergency medicine leadership development strategy.

Since the return of the refugee population to Kosovo, attempts at development of an emergency medical system in Kosovo have met with varied success, and have been hampered by unforeseen barriers. These barriers have been exacerbated by the lack of detailed health system assessments. A multimodal approach of data collection and analysis was used to identify potential barriers, and determine the appropriate level of intervention for emergency medicine (EM) development in Kosovo. The four step, multi-modal, data collection tool utilized: 1) demographic and health systems data; 2) focus group discussions with health-care workers; 3) individual interviews with key individuals in EM development; and 4) Q-Analysis of the attitudes and opinions of EM leaders. Results indicated that Emergency Medicine in Kosovo is under-developed. This method of combined quantitative and qualitative analysis identified a number of developmental needs in the Kosovar health system. There has been little formal training, the EMS system lacks organization, equipment, and a reliable communication system, and centralized emergency centers, other than the center at Prishtina Hospital, are inadequate. Group discussions and interviews support the desire by Kosovar health-care workers to establish EM, and highlight a number of concerns. A Q-methodology analysis of the attitudes of potential leaders in the field, supported these concerns and identified two attitudinal groups with deeper insights into their opinions on the development of such a system. This study suggests that a multi-modal assessment of health systems can provide important information about the need for emergency health system improvements in Kosovo. This methodology may serve as a model for future, system-wide assessments in post-conflict health system reconstruction.

Data Collection↗
PubMedDate not supplied

Safety and efficacy of low-dose intravenous immune globulin (IVIG) treatment for infants and children with immune thrombocytopenic purpura. Low-Dose IVIG Study Group.

PURPOSE: This report presents pooled data from two multicenter studies conducted to assess the efficacy, safety, and tolerance of lower-dose intravenous immune globulin (IVIG) regimens of 250 mg/kg/day, 400 mg/kg/day, and 500 mg/kg/day for 2 days, compared to an established higher-dose regimen of 1 g/kg/day for 2 days, in children with immune thrombocytopenic purpura (ITP). PATIENTS AND METHODS: A total of 24 children received IVIG (Gammar i.v.). In Study 1, 10 centers enrolled 12 children between 5 and 12 years old who received IVIG at either 400 mg/kg/day or 1 g/kg/day for 2 days. In Study 2, five centers enrolled 12 infants and children younger than 5 years old who received IVIG at 250 mg/kg/day or 500 mg/kg/day for 2 days. Both studies were prospective and randomized. RESULTS: IVIG treatment was effective (platelets increased at least 30,000/cu mm over baseline) in 94% (16 of 17) of the evaluable patients in the low-dosage group. Platelet increases occurred rapidly: by 48 hours, total platelet counts ranged from 32,000/cu mm to 256,000/cu mm, and peak platelet counts reached 38,000/cu mm to 551,000/cu mm. Adverse events (AEs) were most often mild, lasted less than 3 hours, and were usually those typically associated with immunoglobulin administration-headache, nausea, vomiting, and fever. There were two serious AEs-an anaphylactoid reaction in one patient in the 400 mg/kg group and aseptic meningitis in one patient in the 1 g/kg high-dosage group. Both patients recovered without sequelae and were responders. Although the incidence of AEs varied by dosage groups, this difference was not significant. However, the incidence of AEs was affected by age. AEs were significantly lower in patients younger than 5 years of age. CONCLUSIONS: In this small, randomized trial, low-dose IVIG in 2-day regimens of 250, 400, or 500 mg/kg/day rapidly reversed thrombocytopenia just as effectively as 1 g/kg/day in infants and young children with ITP. Lower-dosage regimens are safe and well-tolerated; the incidence of AEs is lower in children younger than 5 years of age.

Child↗
PubMedDate not supplied

Feasibility of blood glucose self-monitoring in unstable insulin-dependent diabetes.

We have studied the impact of home blood glucose measurements with the Ames Dextrostix/Eyetone system on the metabolic control of 17 insulin-dependent, ketosis-prone, unstable diabetic patients. Thirteen patients (69 patient-months) were enrolled in a comprehensive program designed to achieve excellent metabolic control and which included the daily use of the Eyetone meter. Eleven of these patients were diabetic kidney recipients on daily prednisone. The improvement of the metabolic control, as assessed by daily home blood glucose measurements, was highly significant (P < 0.001) in 11 patients (85%). The control was still inadequate, however, in at least seven patients. In four unstable diabetic patients who were given the meter for 4 mo but were not followed closely during this period, modest or no improvement in metabolic control was observed. The Eyetone meter proved highly precise and accurate in our patients' hands. Several patients achieved a coefficient of variation of less than 5 (in 10 consecutive determinations) and a correlation coefficient with the Beckman glucose analyzer of 0.96. We concluded that the metabolic control can be markedly improved in the most unstable diabetic patients with home blood glucose measurements, provided the patients receive adequate and frequent encouragement and diabetic teaching. Without the latter, at least in unstable diabetes, whether patients are compliant or not, the instrument may have little impact on control.

Adult↗
PubMedDate not supplied

Long-term, ambulatory, subcutaneous insulin infusion versus multiple daily injections in brittle diabetic patients.

We compared the blood glucose control of four intact and eight kidney recipient, metabolically unstable, ketosis-prone, insulin-dependent diabetic patients under two different regimens: (a) intensive conventional treatment with two to four insulin injections daily (48 patient-months) and (B) subcutaneous, portable insulin delivery system (IDS) (54 patient-months). Both regimens included frequent home blood glucose and 24-h urine glucose determinations and daily telephone follow-up to maximize compliance with treatment. Analyzed as a group the fasting blood glucose for intact patients (A: 172 +/- 13 mg/dl; B: 141 +/- 12, P less than 0.02) and the nonfasting blood glucose for kidney recipient patients (A: 165 +/- 10; B: 138 +/- 5, P less than 0.01) were significantly lower during treatment with the IDS than with multiple injections. Six out of 12 patients (2/4 intact and 4/8 kidney recipient patients) showed significant and consistent improvement of blood glucose concentrations. Four showed marginal and inconsistent improvement. Two patients (one intact and one kidney recipient) improved on the IDS but maintained the improvement when changed back to conventional treatment. The 24-h urine glucose, maximal glucose excursions, number of blood glucoses less than or equal to 40 mg/dl, and glycosylated hemoglobin decreased significantly in some patients on the pump. We conclude that subcutaneous, portable insulin delivery devices can significantly improve the metabolic control of some ambulatory, unstable diabetic patients during long-term treatment beyond that obtained with intensive, multiple-injection, conventional treatment. Normalization of the metabolic control, however, is not obtained. These infusion systems still pose several problems during ambulatory use, which could have serious consequences in patients less compliant and/or followed less closely than ours.

Adult↗
PubMedDate not supplied

Reversal in the seasonal clustering of diabetes in multiplex families.

We studied attributes of diabetic sib pairs in 138 insulin-dependent multiplex families. Within multiply affected families, there is a large subset of siblings diagnosed only a year or less apart in whom the usual seasonal variation for diabetes is reversed. Furthermore, we confirm that affected sibs tend to cluster for onset of disease. The clustering, however, is limited to those sibs younger than 20 yr. These diabetic patients cannot be categorized by HLA type, and a common environment may play a major role in the development of insulin-dependent diabetes.

Diabetes Mellitus, Type 1↗