Flexible Insulin Therapy Untethered Insulin Regimen Using Insulin Degludec and Continuous Subcutaneous Insulin Infusion in Avidly Exercising Patients With Type 1 Diabetes: FIT Untethered
试验速览
- 阶段
- 4 期
- 入组人数
- 30
- 试验地点
- 1
- 主要终点
- Time in range within 6 hours
研究概览
简要总结
The overall objective of this study is to evaluate glycemic control and patient-reported outcomes in patients with Type 1 diabetes (T1D) who use insulin degludec and continuous subcutaneous insulin infusion in a combination untethered regimen during moderate or high-intensity exercise.
详细描述
FIT untethered is an open-label, randomized, repeated measures cross-over design study, testing glycemic control in "untethered" continuous subcutaneous insulin infusion (CSII) therapy compared to usual CSII therapy, in physically active patients with T1D (N=30). During 2-week screening visits, participants are randomized into either the usual CSII arm or the untethered CSII arm. Patients in the usual group continue with their established CSII therapy. Patients in the untethered group are to administer 50% of their basal dose through an insulin degludec injection every morning, with the other 50% achieved through their established CSII therapy. Bolus insulin remains at the established dose in both groups. After randomization, patients begin Phase I and transition into a 2-week insulin optimization period. Then, participants will complete 2 in-clinic, supervised exercise visits (1 moderate and 1 high intensity exercises) in the following week. After, participants must complete 2 unsupervised at-home exercises per week for 3 weeks (cumulative total of 2 moderate and 4 high intensity exercises). After the home exercise period, participants cross-over to the other study arm and begin Phase II. Phase II is similar to Phase I: 2 weeks of insulin dose optimization, 1 week of supervised clinic exercise, and 3 weeks of unsupervised home exercise. For both in-clinic and home-based exercise, the participant's insulin pump will be disconnected and suspended 60 minutes prior to beginning the workout, and will be reconnected immediately following each workout. A continuous glucose monitoring (CGM) device will be worn by each participant for the entire duration of the study. The co-primary outcomes of the study include time in range (4.0 - 10.0 mmol/L) in the 6 hours after the start of moderate- and high-intensity exercise. The key secondary outcomes include the glucose variability during the 24 hour period after the start of both moderate and high intensity exercise, and patient reported outcomes before and after exercise.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 55 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Adults with clinical diagnosis of T1D
- •Age 18-55 years, inclusive
- •Diagnosis of T1D ≥ 6 months
- •A1c ≤ 8.5% at screening visit
- •Using stable CSII therapy for ≥ 6 months
- •Exercise regularly (≥ 3 times per week of moderate or vigorous exercise)
- •VO2peak ≥ 30 ml/kg/min for females and ≥ 32 ml/kg/min for males
- •Willing to adhere to the protocol requirements for the duration of the study
- •Written informed consent
- •Fasting C-peptide value of < 0.7 ng/mL (0.23 nmol/L) at screening visit
排除标准
- •Pregnant or lactating
- •Already using a split regimen of combination CSII and basal insulin injection
- •Active diabetic retinopathy (proliferated diabetic retinopathy, or vitreous hemorrhage in past 6 months) that could potentially be worsened by the exercise protocol
- •Any evidence of unstable cardiovascular disease, disorders or abnormalities as per physician's discretion
- •Currently following a very low calorie or other weight-loss diet which may impact glucose control and mask the primary and secondary outcome measures
- •More than one episode of severe hypoglycemia with seizure, coma or requiring assistance of another person during the past 6 months
- •Known hypoglycemia unawareness
- •Use of acetaminophen (Tylenol) during the study period
- •Medications other than insulin that might impact outcome measures:
- •Beta blockers
- •Any agents that affect hepatic glucose production, including all beta adrenergic agonists or antagonists, all xanthine derivatives
- •Pramlintide
- •Any non-insulin diabetes therapy
研究组 & 干预措施
Untethered CSII
Basal dosing - total CSII basal dose will be delivered by 50% through continuing CSII therapy used prior to study enrollment and 50% through the addition of once daily insulin degludec injected in the morning; Bolus dosing - continue the established bolus insulin dose
干预措施: Insulin Degludec (Drug)
结局指标
主要结局
Time in range within 6 hours
时间窗: 6 hours
Percentage of time with CGM glucose between 4.0 - 10.0 mmol/L within 6 hours after the start of high-intensity or moderate-intensity, in-clinic exercise
次要结局
- Change in glucose within 60 mins after high-intensity exercise starts(60 mins)
- Change in glucose within 120 mins after moderate-intensity exercise starts(120 mins)
- Time spent in hypoglycemia 24 hours after exercise(24 hours)
- Time spent in hyperglycemia 24 hours after exercise(24 hours)
- Time in range 24 hours after exercise(24 hours)
- Frequency of hypoglycemia 24 hours after exercise(24 hours)
- Time in range in the last 4 weeks of each study phase(4 weeks)
- Frequency of hypoglycemia in the last 4 weeks of each study phase(4 weeks)
- Change in Diabetes Medication Satisfaction (DiabMedSat) Score(11 weeks)
- Change in Hypoglycemia Fear Score(11 weeks)
- Change in TRIM-D Score(11 weeks)
研究者
Ronnie Aronson, MD
Chief Medical Officer
LMC Diabetes & Endocrinology Ltd.