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Related Concept Videos

Type II Diabetes Mellitus III: Clinical Manifestations and Diagnosis01:25

Type II Diabetes Mellitus III: Clinical Manifestations and Diagnosis

Type 2 diabetes mellitus develops gradually and is often asymptomatic in early stages.Clinical ManifestationsWhen symptoms appear, they include fatigue, blurred vision, pruritus, delayed wound healing, and recurrent infections, particularly candidal infections. Peripheral neuropathy may present as numbness or tingling in the extremities. Classic hyperglycemia symptoms—polyuria, polydipsia, and polyphagia—are less common. Most patients are overweight and frequently have associated hypertension...
Hyperglycemia01:29

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...
Diabetes Mellitus: Type 2 and Gestational01:22

Diabetes Mellitus: Type 2 and Gestational

Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
Hypoglycemia and Glucagon01:15

Hypoglycemia and Glucagon

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...
Diabetes: Symptoms, Diagnosis, and Complications01:15

Diabetes: Symptoms, Diagnosis, and Complications

For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is based on...
Hypoglycemia01:26

Hypoglycemia

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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A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
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Published on: January 19, 2024

[Glycated hemoglobin: a new screening tool?].

K Gariani1, C Tran, J Philippe

  • 1Service de médecine interne générale, HUG, 1211 Geneve 14. Karim.Gariani@hcuge.ch

Revue Medicale Suisse
|July 15, 2011
PubMed
Summary
This summary is machine-generated.

Glycosylated hemoglobin (HbA1c) is a key measure for diabetes management and complication prediction. While valuable, its diagnostic use faces challenges with arbitrary thresholds and limited standardization.

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A High-Throughput Multiplexed Screening for Type 1 Diabetes, Celiac Diseases, and COVID-19
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Published on: July 5, 2022

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Last Updated: May 31, 2026

A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
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A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level

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A High-Throughput Multiplexed Screening for Type 1 Diabetes, Celiac Diseases, and COVID-19
06:46

A High-Throughput Multiplexed Screening for Type 1 Diabetes, Celiac Diseases, and COVID-19

Published on: July 5, 2022

Area of Science:

  • Clinical Chemistry
  • Endocrinology
  • Diabetes Mellitus Research

Background:

  • Glycosylated hemoglobin (HbA1c) is crucial for assessing mean glycemic control in diabetic patients.
  • Recent recommendations highlight HbA1c's diagnostic value for diabetes.
  • HbA1c serves as a primary predictor for diabetes-related complications due to its accuracy and ease of measurement.

Purpose of the Study:

  • To analyze the implementation of HbA1c testing for diabetes diagnosis.
  • To compare the advantages and disadvantages of HbA1c versus plasma glucose as a diagnostic tool.
  • To review current data on HbA1c's sensitivity, specificity, and clinical implications.

Main Methods:

  • Literature review of studies evaluating HbA1c as a diagnostic marker for diabetes.
  • Comparative analysis of HbA1c and plasma glucose testing methodologies.
  • Examination of data on diagnostic accuracy (sensitivity, specificity) of HbA1c.

Main Results:

  • HbA1c offers a reliable measure of long-term glycemic control and complication risk.
  • Challenges include arbitrary threshold values and the need for standardized HbA1c assay methods.
  • Plasma glucose testing remains a standard diagnostic method with its own set of advantages and limitations.

Conclusions:

  • HbA1c has significant potential as a diagnostic tool for diabetes, complementing existing methods.
  • Further standardization of HbA1c assays is necessary to optimize its diagnostic utility.
  • The clinical implications of HbA1c testing require careful consideration alongside plasma glucose levels.