UTA CP2 NURS 5338 - Final Exam
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What is Hemoglobin A1C?
Answer:
Hemoglobin A1C (HbA1C or glycated hemoglobin) is a blood test that measures the average
blood glucose level over the previous 2–3 months. It is widely used to diagnose diabetes,
monitor long-term glycemic control, and evaluate the effectiveness of diabetes treatment.
Expert Rationale:
Hemoglobin is the oxygen-carrying protein found inside red blood cells. When glucose
circulates in the bloodstream, it naturally attaches to hemoglobin through a non-enzymatic
process known as glycation. The higher the blood glucose concentration, the greater the
amount of glucose that binds to hemoglobin. Since red blood cells have an average lifespan
of approximately 120 days, the percentage of glycated hemoglobin reflects the average
blood glucose over the preceding two to three months.
Unlike a fasting blood glucose test, HbA1C does not require fasting and is not significantly
affected by short-term factors such as recent meals, temporary stress, or acute illness. This
makes it one of the most reliable indicators of long-term glycemic control. The American
Diabetes Association (ADA) recommends an HbA1C target of less than 7% for many non-
pregnant adults with diabetes, although targets should be individualized based on age,
comorbidities, duration of diabetes, and risk of hypoglycemia.
Diagnostic values include:
• Normal: Less than 5.7%
• Prediabetes: 5.7–6.4%
• Diabetes: 6.5% or higher on two separate tests or with confirmatory testing.
, Elevated HbA1C levels are strongly associated with an increased risk of diabetes-related
complications such as diabetic retinopathy, nephropathy, neuropathy, myocardial infarction,
and stroke. However, HbA1C may be unreliable in conditions affecting red blood cell survival,
including hemolytic anemia, recent blood transfusion, pregnancy, severe kidney disease, and
certain hemoglobin disorders. In these situations, alternative markers such as fructosamine
or continuous glucose monitoring (CGM) may provide a more accurate assessment.
Healthcare providers use HbA1C measurements to determine whether treatment
adjustments are necessary. A persistently elevated HbA1C suggests inadequate glycemic
control and may indicate the need for improved dietary management, increased physical
activity, medication adjustment, or insulin therapy.
What is Lantus insulin?
Answer:
Lantus (insulin glargine) is a long-acting basal insulin that provides continuous blood glucose
control for approximately 24 hours. It is commonly prescribed for individuals with type 1 and
type 2 diabetes to maintain stable blood glucose levels between meals and overnight.
Expert Rationale:
Lantus is a genetically modified form of human insulin designed to dissolve slowly after
subcutaneous injection. Once injected, it forms microscopic deposits in the subcutaneous
tissue that gradually release insulin into the bloodstream over approximately 24 hours
without producing a pronounced peak. This steady release closely mimics the body's natural
basal insulin secretion.
Because Lantus has minimal peak activity, it carries a lower risk of nocturnal hypoglycemia
compared with intermediate-acting insulins such as NPH insulin. Patients typically
administer Lantus once daily at the same time each day to maintain consistent insulin levels.
Lantus primarily controls fasting blood glucose rather than postprandial glucose. Therefore,
individuals with type 1 diabetes usually require rapid-acting insulin before meals in addition
to Lantus. In type 2 diabetes, Lantus may be combined with oral medications or non-insulin
injectable therapies when lifestyle modification alone does not achieve glycemic targets.
Common adverse effects include hypoglycemia, weight gain, injection-site reactions, and
lipodystrophy if injections are repeatedly administered at the same location. Patients should
rotate injection sites to minimize tissue changes and ensure consistent insulin absorption.
Clinicians adjust Lantus doses based on fasting blood glucose levels rather than post-meal
glucose values. Because insulin requirements vary among individuals due to diet, physical
activity, illness, stress, and concurrent medications, regular blood glucose monitoring is
essential to optimize dosing and reduce complications.
Review Questions and Correct
Answers/ Latest Update / Already
Graded | 100 % Guaranteed pass | A +
Graded and verified
What is Hemoglobin A1C?
Answer:
Hemoglobin A1C (HbA1C or glycated hemoglobin) is a blood test that measures the average
blood glucose level over the previous 2–3 months. It is widely used to diagnose diabetes,
monitor long-term glycemic control, and evaluate the effectiveness of diabetes treatment.
Expert Rationale:
Hemoglobin is the oxygen-carrying protein found inside red blood cells. When glucose
circulates in the bloodstream, it naturally attaches to hemoglobin through a non-enzymatic
process known as glycation. The higher the blood glucose concentration, the greater the
amount of glucose that binds to hemoglobin. Since red blood cells have an average lifespan
of approximately 120 days, the percentage of glycated hemoglobin reflects the average
blood glucose over the preceding two to three months.
Unlike a fasting blood glucose test, HbA1C does not require fasting and is not significantly
affected by short-term factors such as recent meals, temporary stress, or acute illness. This
makes it one of the most reliable indicators of long-term glycemic control. The American
Diabetes Association (ADA) recommends an HbA1C target of less than 7% for many non-
pregnant adults with diabetes, although targets should be individualized based on age,
comorbidities, duration of diabetes, and risk of hypoglycemia.
Diagnostic values include:
• Normal: Less than 5.7%
• Prediabetes: 5.7–6.4%
• Diabetes: 6.5% or higher on two separate tests or with confirmatory testing.
, Elevated HbA1C levels are strongly associated with an increased risk of diabetes-related
complications such as diabetic retinopathy, nephropathy, neuropathy, myocardial infarction,
and stroke. However, HbA1C may be unreliable in conditions affecting red blood cell survival,
including hemolytic anemia, recent blood transfusion, pregnancy, severe kidney disease, and
certain hemoglobin disorders. In these situations, alternative markers such as fructosamine
or continuous glucose monitoring (CGM) may provide a more accurate assessment.
Healthcare providers use HbA1C measurements to determine whether treatment
adjustments are necessary. A persistently elevated HbA1C suggests inadequate glycemic
control and may indicate the need for improved dietary management, increased physical
activity, medication adjustment, or insulin therapy.
What is Lantus insulin?
Answer:
Lantus (insulin glargine) is a long-acting basal insulin that provides continuous blood glucose
control for approximately 24 hours. It is commonly prescribed for individuals with type 1 and
type 2 diabetes to maintain stable blood glucose levels between meals and overnight.
Expert Rationale:
Lantus is a genetically modified form of human insulin designed to dissolve slowly after
subcutaneous injection. Once injected, it forms microscopic deposits in the subcutaneous
tissue that gradually release insulin into the bloodstream over approximately 24 hours
without producing a pronounced peak. This steady release closely mimics the body's natural
basal insulin secretion.
Because Lantus has minimal peak activity, it carries a lower risk of nocturnal hypoglycemia
compared with intermediate-acting insulins such as NPH insulin. Patients typically
administer Lantus once daily at the same time each day to maintain consistent insulin levels.
Lantus primarily controls fasting blood glucose rather than postprandial glucose. Therefore,
individuals with type 1 diabetes usually require rapid-acting insulin before meals in addition
to Lantus. In type 2 diabetes, Lantus may be combined with oral medications or non-insulin
injectable therapies when lifestyle modification alone does not achieve glycemic targets.
Common adverse effects include hypoglycemia, weight gain, injection-site reactions, and
lipodystrophy if injections are repeatedly administered at the same location. Patients should
rotate injection sites to minimize tissue changes and ensure consistent insulin absorption.
Clinicians adjust Lantus doses based on fasting blood glucose levels rather than post-meal
glucose values. Because insulin requirements vary among individuals due to diet, physical
activity, illness, stress, and concurrent medications, regular blood glucose monitoring is
essential to optimize dosing and reduce complications.
