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Hyperglycemia

Hyperglycemia

Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...

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Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
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Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...

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The therapy for diabetes aims to alleviate hyperglycemia-related symptoms, prevent acute metabolic decompensation, and reduce chronic end-organ complications. Glycemic control is evaluated through short-term (self-monitoring, continuous glucose monitoring) and long-term (A1c, fructosamine) metrics, enabling near real-time tracking of blood glucose levels and reflecting glycemic control over specific time frames.
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Repaglinide (Prandin) and Nateglinide (Starlix), known as glinides, are oral insulin secretagogues that stimulate insulin release from pancreatic β cells by closing the ATP-sensitive potassium channels (KATP channel). Repaglinide controls insulin release from pancreatic β cells by managing potassium efflux. It shares two binding sites with sulfonylureas and also has a unique site, indicating overlapping mechanisms of action. With a rapid onset and a 4-7 hour duration, it effectively manages...

Hypoglycemia

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Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...

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Improving IV Insulin Administration in a Community Hospital

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Glucose information for tight glycemic control: different methods with different challenges.

Christian Weber¹, Kurt Neeser

¹Institute for Medical Informatics and Biostatistics, Basel, Switzerland.

Journal of Diabetes Science and Technology

|October 6, 2010

Summary

Accurate glucose monitoring is crucial for managing diabetes and improving patient outcomes. However, even professional laboratory glucose measurements may not always reflect a patient's true blood glucose level.

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Area of Science:

Clinical Chemistry
Laboratory Medicine
Diabetes Management

Background:

Tight glucose control is vital for preventing diabetes complications.
Maintaining optimal glucose levels benefits critically ill patients, even those without diabetes.
Various methods exist for glucose measurement, each with limitations.

Purpose of the Study:

To evaluate the accuracy of glucose measurements obtained from core laboratory systems.
To demonstrate that laboratory-derived glucose values may not represent the absolute true glucose level.

Main Methods:

Analysis of glucose measurement data from core laboratory analyzers.
Comparison of laboratory results against a reference standard (implied).

Main Results:

Glucose measurement results from core laboratories can exhibit variability.
These results may not consistently reflect the patient's actual "true" glucose concentration.

Conclusions:

Glucose values from professional laboratory systems require careful interpretation.
Limitations in laboratory glucose measurement systems can impact clinical decision-making.