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相关概念视频

Open and closed-loop control systems01:17

Open and closed-loop control systems

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Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
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A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage
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使用先进的混合闭环系统进行未预告的餐点挑战.

Roy Shalit1, Noga Minsky1, Maya Laron-Hirsh1

  • 1Division of Endocrinology, Diabetes and Metabolism, Sheba Medical Center, Tel-Hashomer, Israel.

Diabetes technology & therapeutics
|June 19, 2023
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概括

餐点预告提高了先进的混合闭环 (AHCL) 系统在1型糖尿病管理中的性能. 虽然不预告的食物高达80g的碳水化合物是安全的,但它们导致低于最佳的血糖控制,与小的不预告的食物 (≤20g) 不同.

关键词:
自动提供胰岛素的自动化输送.闭环的人工胰腺预告餐时间 预告餐时间吃饭后的血糖问题

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科学领域:

  • 内分泌学 在内分泌学.
  • 代谢疾病 代谢疾病
  • 生物医学工程 生物医学工程

背景情况:

  • 先进的混合闭环 (AHCL) 系统可以自动提供胰岛素,但通常需要预告餐点以实现最佳的血糖控制.
  • MiniMedTM 780G系统是一个AHCL算法,旨在改善1型糖尿病 (T1D) 患者的射程时间 (TIR).

研究的目的:

  • 为了比较MiniMedTM 780G AHCL系统的血糖控制有效性和安全性,在T1D的成年人中使用和不使用餐点预告.
  • 评估未预告的碳水化合物摄入对TIR和血糖变异性的影响.

主要方法:

  • 进行了一项单臂研究,涉及14名T1D成年人.
  • 参与者接受了监督的5天时间,随后是90天的家庭未预告的饮食阶段 (≤80g碳水化合物),随后是90天的家庭预告的饮食阶段.
  • 对TIR,高血糖和低血糖指标进行了持续血糖监测数据的分析.

主要成果:

  • 在未公布阶段 (67.5%) 与公布阶段 (77.7%) 相比,时间范围 (TIR 70-180 mg/dL) 在未公布阶段 (67.5%) 显着较低 (P<0.01).
  • 没有预告的饮食导致高血糖症 (>180 mg/dL) 的时间增加,低血糖症的时间减少 (<70 mg/dL).
  • 没有预告的食物高达60g的碳水化合物并没有增加极端高血糖 (>250 mg/dL),而未预告的食物≤20g并没有显著改变TIR.

结论:

  • 在宣布吃饭时,AHCL系统实现了最佳的血糖控制.
  • 虽然是安全的,但不预约餐 ≤80g碳水化合物导致不理想的餐后血糖控制,特别是在碳水化合物负载较高的情况下.
  • 宣布小餐 (≤20g碳水化合物) 不会对血糖控制产生负面影响,这表明有效的AHCL功能没有宣布的门.