Continuous Insulin Infusion Systems Research Articles

A Nutritional Approach to Optimizing Pump Therapy in Type 1 Diabetes Mellitus

Achieving optimal glucose control in individuals with type 1 diabetes (T1DM) continues to pose a significant challenge. While continuous insulin infusion systems have shown promise as an alternative to conventional insulin therapy, there remains a crucial need for greater awareness regarding the necessary adaptations for various special circumstances. Nutritional choices play an essential role in the efficacy of diabetes management and overall health status for patients with T1DM. Factors such as effective carbohydrate counting, assessment of the macronutrient composition of meals, and comprehending the concept of the glycemic index of foods are paramount in making informed pre-meal adjustments when utilizing insulin pumps. Furthermore, the ability to handle such situations as physical exercise, illness, pregnancy, and lactation by making appropriate adjustments in nutrition and pump settings should be cultivated within the patient–practitioner relationship. This review aims to provide healthcare practitioners with practical guidance on optimizing care for individuals living with T1DM. It includes recommendations on carbohydrate counting, managing mixed meals and the glycemic index, addressing exercise-related challenges, coping with illness, and managing nutritional needs during pregnancy and lactation. Additionally, considerations relating to closed-loop systems with regard to nutrition are addressed. By implementing these strategies, healthcare providers can better equip themselves to support individuals with T1DM in achieving improved diabetes management and enhanced quality of life.

SAT364 A Rare Cause of Hyperandrogenism in a Premenopausal Woman

Abstract Disclosure: L. El Musa Penna: None. W. Medina-Torres: None. L.R. Sepulveda-Garcia: None. L.N. Madera Marin: None. A. Rosado-Burgos: None. M.A. Ortiz-Rivera: None. B. Torres Rivera: None. M. Alvarado: None. M. Ramirez: None. L.A. Gonzalez-Rodriguez: None. M. Marcos Martínez: None. M. Correa Rivas: None. N. Bracero, MD: None. Hyperandrogenism in premenopausal women is most commonly associated to polycystic ovarian syndrome (PCOS). Approximately 10% of females in reproductive age present with clinical and/or biochemical findings of androgen excess, such as hirsutism, acne, alopecia, oligo-amenorrhea or if hyperandrogenism is severe it can lead to extreme virilization. Androgen excess can also contribute to insulin resistance. In this case we discuss a patient with severe hyperandrogenism, extreme insulin resistance and a rare cause of androgen excess in a woman of childbearing age. 34-year-old female patient G0P0 with type 2 diabetes mellitus (T2DM) on continuous insulin infusion system (CIIS), familial partial lipodystrophy, PCOS and severe hyperandrogenism, who was referred to our clinics for management of uncontrolled T2DM. Patient was on CIIS with regular insulin U-500 using a total daily dose of 95 units. She referred amenorrhea for the past 12 years and significant progression of hirsutism, alopecia and acanthosis nigricans in the past two years. Patient had clinical findings of hyperandrogenism such as hirsutism evaluated with modified Ferriman-Gallwey scale with a score of 32, alopecia Ludwig class 3 and marked acanthosis nigricans in neck and abdomen.Pre-operative laboratories: hemoglobin (Hgb) level 15.13 g/dL, hematocrit (Ht) 44.59 %, total testosterone level 525 ng/dL (13-53 ng/dL) and DHEAS 113 ug/dL (95.8-511.7 ug/dL), suggesting an ovarian source of androgen excess. Transvaginal ovarian ultrasound showed at the posteromedial edge of right ovary a hyperechoic structure measuring 1.5 cm long x 1.0 cm AP representing a lesion of unknown etiology. After discussion with patient a decision for oophorectomy was made. Pathology report described the ovary negative for neoplasia with findings consistent with hyperthecosis. Laboratories two weeks post-operative showed significant decrease in total testosterone to 81 ng/dL and in Hgb/ Ht (12.50 g/dL and 37.8% respectively). Insulin requirement decreased and she was able to be transitioned to U-100 insulin lispro with a total daily dose of 100. Four weeks after surgery patient had her menstrual period. Ovarian hyperthecosis is a disorder where there is an increased tissue with luteinized theca cells in the ovarian stroma; these cells are ovarian interstitial cells that differentiate into steroidogenically active cells. It is most commonly observed in post-menopausal women, but it has been described in women of childbearing age presenting with worsening hirsutism, virilization and insulin resistance. Monitoring patterns and progression of androgen excess is important in premenopausal women with a diagnosis of PCOS. Severe biochemical or clinical presentation, as well as progression of hyperandrogenism should increase suspicion of additional pathological entities as it will improve patient’s quality of life with the appropriate management. Presentation Date: Saturday, June 17, 2023

How did COVID-19 pandemic affect the glycemic regulation of patients with type 1 diabetes mellitus and continuous insulin infusion systems? Experience of a single diabetes center

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | ISSN 1479-6848 (online)

Serial album on Continuous Insulin Infusion System as an innovative educational technology in diabetes

RESUMO Objetivo: construir e validar conteúdo e aparência de álbum seriado sobre insulinoterapia por Sistema de Infusão Contínua. Método: estudo metodológico, realizado em três etapas em Fortaleza, Ceará, Brasil, nos meses de agosto a novembro de 2018. Realizou-se a construção do álbum seriado e a validação de conteúdo e aparência pelos especialistas, e avaliação do público-alvo. Calcularam-se Índice de Validade de Conteúdo e Índice de Concordância. Resultados: os juízes consideraram válidos o conteúdo e a aparência do álbum, o que representa que o material é adequado como tecnologia educativa. Os especialistas sugeriram ajustes, incorporados ao material para produção impressa da versão final. O público-alvo também avaliou de forma positiva o álbum seriado. Conclusão: percebemos que o álbum seriado foi considerado uma tecnologia educacional inovadora em diabetes, valiosa para a promoção do conhecimento sobre Sistema de Infusão Contínua de Insulina, com conteúdo rico, atualizado, aliado à clareza, formato adequado e ilustrações explicativas.

Serial album on Continuous Insulin Infusion System as an innovative educational technology in diabetes.

to build and validate a serial album content and appearance on insulin therapy using a Continuous Infusion System. a methodological study, carried out in three stages in Fortaleza, Ceará, Brazil, from August to November 2018. The serial album construction and content and appearance validity were carried out by experts, and assessment, by the target audience. Content Validity Index and Concordance Index were calculated. the judges considered the serial album content and appearance to be valid, which means that the material is suitable as an educational technology. Experts suggested adjustments, incorporated into the material for print production of the final version. The target audience also assessed the serial album positively. we realized that the serial album was considered an innovative educational technology in diabetes, valuable for promoting knowledge about Continuous Insulin Infusion System, with rich, updated content, combined with clarity, suitable format and explanatory illustrations.

Non-balanced translocation between the short arms of chromosomes 8 and 6 associated with type 1 diabetes mellitus.

SummaryWe describe a rare case of a girl with an initial diagnostic hypothesis of chromosome 8 trisomy based on clinical findings and karyotyping, which identified a structural change in the short arm of chromosome 8 (46,XX,add(8)(p23)). At the age of 7, she developed type 1 diabetes mellitus and started insulin therapy with multiple daily doses, and then she started to use a continuous insulin infusion system (pump) at 10 years of age. At the age of 12, she underwent a molecular study that identified an unbalanced translocation between the short arms of chromosomes 6 and 8 – 46,XX,add(8)(p23).ish der(8)t(6;8)(GS-196I5+;RP-11338B22−).Learning pointsPatients with an unbalanced translocation between the short arms of chromosomes 6 and 8 – 46,XX,add(8)(p23).ish der(8)t(6;8)(GS-196I5+;RP-11338B22-) may present syndromic features suggestive of chromosome 8 trisomy.Main characteristics are a prominent forehead, ocular and breast hypertelorism, ocular, external ear and palate abnormalities, a short neck, heart defects, and developmental delay.Patients with 46,XX,add(8)(p23).ish der(8)t(6;8)(GS-196I5+;RP-11338B22-) may present autoimmune type 1 diabetes mellitus.Karyotyping is an essential tool for the diagnosis of chromosomal changes, but it has some limitations.Multiplex ligation-dependent probe amplification, array-single nucleotide polymorphism and fluorescence in situ hybridization can help diagnose genetic syndromes in patients with atypical evolution.

Postprandial Glucose Control in Type 1 Diabetes: Importance of the Gastric Emptying Rate.

The achievement of optimal post-prandial (PP) glucose control in patients with type 1 diabetes (T1DM) remains a great challenge. This review summarizes the main factors contributing to PP glucose response and discusses the likely reasons why PP glucose control is rarely achieved in T1DM patients. The macronutrient composition of the meal, the rate of gastric emptying and premeal insulin administration are key factors affecting the PP glucose response in T1DM. Although the use of continuous insulin infusion systems has improved PP glucose control compared to conventional insulin therapy, there is still need for further ameliorations. T1DM patients frequently present a delayed gastric emptying (GE) that produces a lower but more prolonged PP hyperglycemia. In addition, delayed GE is associated with a longer time to reach the glycemic peak, with a consequent mismatch between PP glucose elevation and the timing of premeal insulin action. On this basis, including GE time and meal composition in the algorithms for insulin bolus calculation of the insulin delivery systems could be an important step forward for optimization of PP glucose control in T1DM.

Arterial stiffness in children and adolescents with and without continuous insulin infusion.

Background Arterial stiffness is a consequence of aging, but there are several diseases that contribute to this process. The evaluation of pulse wave velocity (PWV) allows a dynamic evaluation of vascular distensibility and the detection of atherosclerosis at an early stage. It was intended to evaluate the PWV in children and adolescents with type 1 diabetes mellitus (T1DM) and to compare their outcome according to the type of treatment used. Methods Forty-eight patients were randomly selected. Inclusion criteria: T1DM, under intensive insulin therapy (multiple daily insulin administrations [MDI] or continuous insulin infusion system [CIIS]). Exclusion criteria: existence of another chronic pathology or microvascular complications. Echocardiography was performed and three measurements of PWV were done, with their mean calculated. Results Most of the children and adolescents presented a PWV ≥ the 75th centile. There was a statistically significant difference for hemoglobin A1c (HbA1c) (7.8 in CIIS vs. 9 in MDI, p < 0.05). There were not statistically significant differences in the PWV between the two groups. This can be attributed to the fact that children with CIIS are those who previously presented greater glycemic instability. There was a significant correlation between PWV and disease duration (Pearson's correlation coefficient [r] = 0.314, p = 0.036). Conclusions This study showed that in children and adolescents with T1DM, there is an important prevalence of arterial stiffness, translated by an increase in PWV. This increase in PWV appears to exist even in very young children with little disease evolution time.

Use of telemedicine in subjects with type 1 diabetes equipped with an insulin pump and real-time continuous glucose monitoring

We evaluated a telemedicine system in patients with type 1 diabetes who had optimized treatment with an insulin pump and a real-time continuous glucose monitoring system. We conducted a prospective, one-year study of 15 subjects. Three medical visits took place: pre-baseline, baseline and at 6 months. Each month the subjects transmitted information from the glucose meter, glucose sensor and insulin pump. We adjusted the treatment and returned the information by email. We evaluated psychological and metabolic variables, including HbA(1c), hypoglycaemia, hyperglycaemia and glucose variability. At baseline the mean age of the subjects was 40 years and the mean duration of diabetes was 22 years. There was a significant reduction in HbA(1c) (7.50 to 6.97%) at 6 months, a significant increase in the number of self-monitoring blood glucose checks per day (5.2 to 6.2), and significant improvements in variability: MODD, mean of daily difference (67 to 53) and MAGE, mean amplitude of glycaemic excursions (136 to 102). There were significant improvements in quality of life (92 to 87), satisfaction with the treatment (34 to 32) and less fear of hypoglycaemia (36 to 32). Adult subjects with type 1 diabetes on treatment with a continuous insulin infusion system and a real time glucose sensor and who have acceptable metabolic control and optimized treatment can benefit from the addition of a telemetry system to their usual outpatient follow-up.

Hormonal and metabolic profiles in insulin-dependent diabetics under subcutaneous conventional and artificial endocrine pancreas (glucose continuous insulin infusion system Biostator) treatment.

The 24-h profiles of some metabolites [glucose, nonesterified fatty acids (NEFA), ketone bodies] and hormones [insulin, glucagon, Cortisol, growth hormone (GH)] have been compared in two groups of insulin-dependent diabetics, during conventional subcutaneous (sc) insulin therapy (n = 9) and during artificial endocrine pancreas [glucose continuous insulin infusion system (GCIIS), Biostator®] treatment (n = 6) respectively. A third group of 7 normal subjects was examined as control. Blood glucose was continuously monitored throughout the study in all subjects. Blood samples for determination of NEFA, acetoacetate, 3-β-OH-butyrate, free insulin, glucagon, Cortisol and growth hormone were withdrawn at frequent intervals. Mean blood glucose profiles in the diabetic sc treated patients ranged between 90 ± 30 and 250± 105 mg/dl (mean ± SD). In the patients treated with Biostator® mean blood glucose profiles were maintained in a physiological pattern, between 87 ± 15 and 146 ± 17 mg/dl, but mean blood glucose, mean amplitude of glycemie excursions and M values were significantly higher than in normal subjects. During Biostator® treatment plasma NEFA and ketone body profiles showed significantly lower values than in diabetic subjects under sc insulin therapy and quite similar to those of normal subjects. In the Biostator® treated patients free insulin levels (range 10 ± 3 and 148 ± 102 μU/ml) were significantly higher than free insulin levels of sc treated patients (range 13, 8 ± 10 and 31 ± 26 μU/ml) and insulin levels of normal subjects (range 8 ± 2 and 60 ± 38 μU/ml). Plasma glucagon concentrations were similar in diabetics under Biostator treatment (range 100 ± 54 and 147 ± 39 pg/ml) and in normal subjects (range99 ± 30 and 170 ± 108 pg/ml); higher values, although not statistically significant, were noted in the sc treated patients. GH levels fluctuated abnormally in both groups of diabetic patients, while no difference was observed in either of the three groups of subjects examined for plasma cortisol.