what should the patient report to the doctor before an oralglucosetolerancetest?

by Rossie Brakus 9 min read

Oral Glucose Tolerance Test: Uses, Preparing, & More

4 hours ago  · Before doing an OGTT, a doctor might perform a glucose challenge test first. This is a shortened version of the OGTT. A glucose challenge test requires no fasting. >> Go To The Portal


What is an oral glucose tolerance test?

An oral glucose tolerance test (OGTT) measures how well your body processes glucose, or blood sugar. Glucose is your body’s primary source of energy. Often, an OGTT is used to diagnose prediabetes and diabetes, especially when gestational diabetes is a concern.

Who needs a three-hour glucose tolerance test?

Having a medical condition associated with the development of diabetes, such as metabolic syndrome or polycystic ovary syndrome If your doctor determines you're at risk or you have a suspicious value on the one-hour test, you may be advised to take a three-hour glucose tolerance test.

How do I prepare for a glucose tolerance test?

Let your doctor know if you're ill or taking any medications, as these factors can affect the results of your test. For eight hours before the test, you won't be able to eat or drink anything. You might want to fast overnight and schedule the test for early the following morning. The glucose tolerance test is done in several steps.

What can affect the accuracy of the glucose tolerance test?

Various factors can affect the accuracy of the glucose tolerance test, including illness, activity level and certain medications. If you're being tested for gestational diabetes, your doctor will consider the results of each blood glucose test.

What is the procedure of oral glucose tolerance test?

Before the test begins, a sample of blood will be taken. You will then be asked to drink a liquid containing a certain amount of glucose (usually 75 grams). Your blood will be taken again every 30 to 60 minutes after you drink the solution. The test may take up to 3 hours.

When would you perform an oral glucose tolerance test on an individual?

The OGTT is usually scheduled in the morning (eg. 09:00 }1 hour) and lasts for 2 hours. The test is preceded by venesection before the glucose load and followed by a second venesection 2 hours after the consumption of a drink containing 75 g of glucose.

Which of the following is a serious side effect of an oral glucose tolerance test?

Serious side effects from this test are very uncommon. With the blood test, some people feel nauseated, sweaty, lightheaded, or may even feel short of breath or faint after drinking the glucose. Tell your doctor if you have a history of these symptoms related to blood tests or medical procedures.

What is the purpose of oral glucose tolerance test?

Your blood sugar level can give your doctor important clues about your health, and an oral glucose tolerance test (OGTT) shows how well your body handles sugar from foods. It can tell whether you are at risk for diabetes or if you already have it. A shorter version of an OGTT checks for diabetes during pregnancy.

What should I do before my glucose test?

DO NOT eat or drink anything (other than sips of water) for 8 to 14 hours before your test. (You also cannot eat during the test.) You will be asked to drink a liquid that contains glucose (75 g). You will have blood drawn before you drink the liquid, and again 2 more times every 60 minutes after you drink it.

Who OGTT guidelines?

These women should have 75g OGTT at 6 weeks or more after delivery. A venous plasma glucose cut off of ≥140 mg/dl (7.8mmol/l) at 2-hour are classified as having GDM....CriteriaIn PregnancyOutside Pregnancy2hours ≥ 200 mg/dlDiabetes MellitusDiabetes Mellitus2hours ≥ 140 mg/dlGDMIGT2hours ≥ 120 mg/dlDGGT

Which of the following instructions is necessary for a patient to understand prior to a postprandial blood test?

You need to rest for the 2 hours before your blood is taken. Activity can give a false blood sugar reading. Do not smoke, eat, or drink during the 2 hours.

What are the adverse effects of oral glucose?

a light-headed feeling, like you might pass out; fever; swelling in your hands or feet; or. sweating, pale skin, severe shortness of breath, chest pain.

What are the contraindications of oral glucose?

 Patients with hypoglycemia who are successfully treated with oral glucose who then refuse transport, should be discouraged from doing so if they have: abnormal vital signs, fever, are taking oral or long acting medications including insulin, a history of alcohol abuse, possible ingestion or poisoning, or they do not ...

What type of diabetes is a glucose tolerance test?

The glucose tolerance test can be used to screen for type 2 diabetes. More commonly, a modified version of the glucose tolerance test is used to diagnose gestational diabetes — a type of diabetes that develops during pregnancy.

How long after drinking glucose solution can you test again?

If one of the results is higher than normal, you'll likely need to test again in four weeks. If two or more of the results are higher than normal, you'll be diagnosed with gestational diabetes.

How long does it take to get a blood glucose test?

The American College of Obstetricians and Gynecologists recommends performing a one-hour blood glucose challenge test to screen for gestational diabetes in low-risk pregnant women between 24 and 28 weeks of pregnancy.

What happens if your glucose levels are higher than normal?

If two or more of the results are higher than normal, you'll be diagnosed with gestational diabetes. If you're diagnosed with gestational diabetes, you can prevent complications by carefully managing your blood glucose level throughout the rest of your pregnancy.

What is the normal blood glucose level after a glucose solution?

One hour after drinking the glucose solution, a normal blood glucose level is lower than 180 mg/dL (10 mmol/L).

How much sugar is in a syrupy glucose solution?

You'll drink about 8 ounces (237 milliliters) of a syrupy glucose solution containing 2.6 ounces (75 grams) of sugar. Two hours later, your blood glucose level will be measured again.

How long before a blood test can you eat?

For eight hours before the test, you won't be able to eat or drink anything. You might want to fast overnight and schedule the test for early the following morning.

Why is the OGTT test so sensitive?

Lack of insulin or insulin resistance causes higher than normal levels of glucose in the blood. The OGTT is a highly sensitive test that can detect imbalances that other tests miss. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) recommends the OGTT for the following purposes: 2 .

What is taken on the day of a blood test?

On the day of the test, after signing in and confirming your insurance information, you will be taken to an examination room where your height and weight will be recorded. Your temperature and blood pressure may also be taken.

What is the OGTT?

The OGTT evaluates how the body manages glucose after a meal. Glucose is a type of sugar produced when the body breaks down carbohydrates consumed in food. Some of the glucose will be used for energy; the rest will be stored for future use.

What hormones control the amount of glucose in the blood?

The amount of glucose in your blood is controlled by the hormones insulin and glucagon . If you have too much, the pancreas secretes insulin to help cells absorb and store glucose. If you have too little, the pancreas secretes glucagon so that stored glucose can be released back into the bloodstream.

What is the purpose of OGTT?

The oral glucose tolerance test (OGTT), also known as the glucose tolerance test, gauges the body’s ability to metabolize sugar (glucose) and clear it from the bloodstream. The test requires you to drink a syrupy solution after a period of fasting. A blood sample is then drawn to determine whether you are metabolizing glucose as you should be.

Is the OGTT a time consuming test?

The OGTT is also the only test that can definitively diagnose IGT. Despite these advantages, the OGTT has its limitations: The OGTT is a time-consuming test, requiring extensive pre-test fasting and a prolonged testing and waiting period. The test results can be influenced by stress, illness, or medications.

Is OGTT more sensitive than FPG?

The OGTT is far more sensitive than the fasting plasma glucose test (FPG) and is often ordered when diabetes is suspected but the FPG returns a normal result. 5  Its ability to detect early impairment means that people with prediabetes can often treat their condition with diet and exercise rather than drugs.

What are the safety exclusion questions on Trutol?

The first question asks the SP if he or she is taking insulin, and the second question asks if he or she is taking oral medications for diabetes. The insulin question is asked during the household interview. The oral medications question may be asked during the household interview, but in the event that it is not, then it is asked in the OGTT examination. Only a “Yes” response to either question will exclude the SP from the OGTT examination.

Who introduces the SP to the OGTT exam?

The coordinator will introduce the SP to the OGTT examination and briefly explain the examination process. The coordinator can answer any general questions the SP has about venipuncture or the OGTT. However, the entire MEC staff must be prepared to answer all the questions the SP poses about the OGTT procedure and must convince the SP of the importance of participating in the OGTT component of the examination.

What are the exclusion criteria for phlebotomy?

The phlebotomist will ask SPs aged 12-59 the shared exclusion pregnancy question if the question has not already been asked elsewhere in the MEC. Hemophilia and chemotherapy safety exclu sion questions are asked and fasting status is assessed in phlebotomy as a prelude to the initial venipuncture examination. If the SP refuses one or more of the blood tubes, then he or she is excluded. The other two exclusion criteria are listed in the first screen of the first section of the OGTT examination.

How many screens are there in the OGTT application?

The OGTT application consists of two sections and five total screens. The first section contains the safety exclusion questions and monitors the time it takes the SP to drink the Trutol. This application is active in the BM, phlebotomy, and MEC Interview rooms. The second section is used by the phlebotomist to record the results of the second blood collection.

Why is NHANES added to the examination protocol?

Because of the increasing occurrence of diabetes in younger ages, NHANES has added this component to the examination protocol to reassess the prevalence of diabetes and impaired glucose tolerance (IGT) in the U.S. population.

How long does it take to get a trutol shot back?

If an SP consumed the entire calibrated dose of the Trutol solution in 10 minutes, and 1 hour and 40 minutes has elapsed, then he or she is eligible to return to phlebotomy to have (1) one additional

What happens if a SP refuses to draw blood?

If an SP refuses one or more blood collection tubes or the phlebotomist is unable to draw any blood tubes during the phlebotomy examination, then the SP is blocked from the GT component.

What is the purpose of blood glucose test?

Blood sugar (glucose) measurements are used to diagnose diabetes. They are also used to monitor glucose control for those people who are already known to have diabetes.

What is a pre-diabetic test?

This is referred to as pre-diabetes (impaired glucose tolerance). The test may also be used to see whether a woman has developed diabetes associated with pregnancy. For this test, you fast overnight. In the morning you are given a drink which contains 75 g of glucose. A blood sample is taken two hours later.

What is it called when your blood glucose is too low?

If your glucose level remains high then you have diabetes. If the level goes too low then it is called hypoglycaemia. The main tests for measuring the amount of glucose in the blood are: Random blood glucose level. Fasting blood glucose level. The HbA1c blood test.

What does a blood glucose level of 11.1 mean?

A level of 11.1 mmol/L or more in the blood sample indicates that you have diabetes. A fasting blood glucose test may be done to confirm the diagnosis.

What is the recommended blood level for diabetes?

It is now recommended that HbA1c can also be used as a test to diagnose diabetes. An HbA1c value of 48 mmol/mol (6.5%) or above is recommended as the blood level for diagnosing diabetes. People with an HbA1c level of 42-47 mmol/mol (6.0-6.5%) are at increased risk of diabetes and cardiovascular disease.

How accurate is a blood test?

A blood test taken in the morning before you eat anything is a more accurate test. Do not eat or drink anything except water for 8-10 hours before a fasting blood glucose test. A level of 7.0 mmol/L or more indicates that you have diabetes.

How often should I check my HBA1C?

If you have diabetes, your HbA1c level may be done every 2-6 months by your doctor or nurse. This test measures your recent average blood sugar (glucose) level. Because it is an average measurement you do NOT need to fast on the day of the test. The test measures a part of the red blood cells.

How long does it take for a blood glucose test to show glucose levels?

The glycosylated hemoglobin (A1C or HbA1C) test shows the overall control of glucose over 90 to 120 days. A fasting blood level indicates only the glucose level at one time. Urine glucose testing is not an accurate reflection of blood glucose level and does not reflect the glucose over a prolonged time.

What is the most important outcome for a diabetic?

A -. The complications of diabetes are related to elevated blood glucose, and the most important patient outcome is the reduction of glucose to near-normal levels. The other outcomes also are appropriate but are not as high in priority. A 38-year-old patient who has type 1 diabetes plans to swim laps daily at 1:00 PM.

How long should you leave insulin in place after injection?

Cleaning the skin with soap and water or with alcohol is acceptable. Insulin should not be frozen. The patient should leave the syringe in place for about 5 seconds after injection to be sure that all the insulin has been injected. The upper abdominal area is one of the preferred areas for insulin injection.

Can insulin be used to control blood glucose?

A. Insulin is not used to control blood glucose in patients with type 2 diabetes. B. Complications of type 2 diabetes are less serious than those of type 1 diabetes. C. Changes in diet and exercise may control blood glucose levels in type 2 diabetes.

Does cheese help with blood glucose?

Orange juice and nonfat milk will elevate blood glucose rapidly, but the cheese and crackers will stabilize blood glucose. Administration of IV glucose might be used in patients who were unable to take in nutrition orally. The patient should be assessed for symptoms of hypoglycemia after glucagon administration.

Can Exenatide cause hypoglycemia?

Exenatide is injected and increases feelings of satiety. Hypoglycemia can occur with this medication. A few weeks after an 82-year-old with a new diagnosis of type 2 diabetes has been placed on metformin (Glucophage) therapy and taught about appropriate diet and exercise, the home health nurse makes a visit.

Is it safe to give potassium to a patient with oliguria?

d. Blood pressure 98/58. (C) Administering IV potassium to a patient who has oliguria is not safe, because potassium intake faster than potassium output can cause hyperkalemia with dangerous cardiac dysrhythmias. Dry mucous membranes, skin tenting, and blood pressure 98/58 are consistent with the need for IV 0.9% NaCl.

Does 98/58 mean you need 0.9% NaCl?

Dry mucous membranes, skin tenting, and blood pressure 98/58 are consistent with the need for IV 0.9% NaCl. Weight gain of 2 pounds in a week does not necessarily indicate fluid overload, because it can be from increased nutritional intake. Only an overnight weight gain indicates a fluid gain.

Overview

Why It's Done

Risks

  • The risks associated with obtaining a blood sample are slight. After your blood is drawn, you may experience bruising or bleeding. You may also feel dizzy or lightheaded. In some cases, infection after your procedure is possible.
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How You Prepare

  • Food and medications
    It's important to eat and drink normally in the days leading up to the glucose tolerance test. Let your doctor know if you're ill or taking any medications, as these factors can affect the results of your test.
See more on mayoclinic.org

What You Can Expect

  • Before the procedure
    For eight hours before the test, you won't be able to eat or drink anything. You might want to fast overnight and schedule the test for early the following morning.
  • During the procedure
    The glucose tolerance test is done in several steps. When you arrive at your doctor's office or lab, a member of your health care team will take a sample of blood from a vein in your arm. This blood sample will be used to measure your fasting blood glucose level.
See more on mayoclinic.org

Results

  • Results of the oral glucose tolerance test are given in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L).
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Clinical Trials

  • Explore Mayo Clinic studiesof tests and procedures to help prevent, detect, treat or manage conditions.
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Purpose of Test

Risks and Contraindications

Before The Test

During The Test

After The Test

Interpreting The Results

  • Your healthcare provider should receive the test results within two to three days. Along with the results will be reference ranges with high and low numeric values. Anything between the high and low values is considered normal. Anything outside of the reference range is either considered abnormally high (often denoted with the letter "H") or abnorm...
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