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A: An excellent question, but a complicated one to answer. Your doctor or nurse educator should be contacted any time your blood sugar runs consistently higher than 250 mg/dl for more than two days. When a person with Type 2 diabetes encounters a high blood sugar, the strategy used in bringing it down will vary from individual to individual. This is because of the differences in treatment concerning diet, exercise, and medication. It will also depend upon the guidelines for glucose control that you and your doctor have mutually agreed upon.
When high blood sugars do occur, there are a number of strategies that can be employed to adjust the glucose level back down to a normal range. These might include:
1) Eating less food at the next meal, eliminating a snack and/or eating foods with a lower glycemic index.
A general rule of thumb to follow is decreasing 15 grams of carbohydrate (the amount found in one starch exchange, one fruit exchange, or one cup skim milk exchange) will lower blood glucose by 30 mg/dl. If you test your blood sugar at 182 mg/dl before a meal or snack, then eliminate one starch and one cup milk at the next meal to bring the glucose value as close to 120 mg/dl as a baseline. Although people with diabetes will respond differently to this adjustment, it provides a basic guideline to start with.
For persons with Type 2 diabetes who are overweight, the loss of only 5% to 10% of total weight loss can dramatically improve blood glucose values (so just cutting calories moderately can achieve better blood glucose control).
Lastly, choosing foods with a lower glycemic index, i.e., foods that do not raise blood sugar as quickly or dramatically, can help to bring blood glucose back into a normal range. To test the glycemic effect of a food on your system, you will need to do more frequent monitoring. For example, you may want to compare the effect of brown rice versus baked potato by eating equivalent carbohydrate amounts of these foods at dinner and comparing your blood glucose response two hours later. Some examples of foods with a low glycemic index are dried beans and lentils. The exact effect will vary from person to person.
2) Increasing activity or incorporating more exercise.
Persons with Type 2 diabetes generally respond quite favorably to increased exercise with a lowered blood glucose value. Simple exercise, such as walking 20 minutes or more per day, can effectively improve glucose tolerance and induce weight loss. Proper exercise can actually be effective enough to lower or completely eliminate the need for medication altogether.
3) Increasing, changing medications, and/or administering them more frequently.
Although this is certainly an option, it makes more sense to address this problem of elevated blood glucose by exercise and cutting back on food. These are measures that are less costly and have fewer side-effects, but if they aren't effective, a medication change may be indicated. If you are on the minimal dose of oral agents, your doctor might raise the dose or split it into morning and evening doses.
This could also be true of those using insulin. Taking more shots per day does not mean your diabetes is worse. It may even bring more flexibility into your lifestyle. In fact, a rule of thumb for those on insulin (check with your doctor first before making these adjustments) is to take one unit of regular insulin to lower blood glucose 30 mg/dl. If the blood sugar is 191 mg/dl before a meal, an extra three units of insulin will bring the glucose down about 100 mg/dl. It is important to note that this rule may change for people who exercise regularly (it will take less insulin to achieve the desired effect) or for those who become ill (they are more insulin resistant and may need more insulin to achieve the desired effect). The effectiveness of insulin is dramatically decreased also by high blood sugar levels.
4) Relaxation techniques and behavioral management.
Relaxation exercises, including deep breathing and audio tapes that guide you through deep muscle relaxation, can reduce stress and help you deal more effectively with it. There are tapes available specifically designed to create images of healthiness in diabetic individuals and encourage visualization of improved glucose control. Behavioral management techniques also improve an overall sense of control of one's life and self-efficacy, so that diabetes becomes a state of "wellness in the midst of illness." When relaxed and in control, blood glucose values can improve.
5) Treating identified illness and/or infections.
Illness and infection causes a rise in adrenergic hormones which increase the production of glucose in the body. This extra surge of glucose is part of the healing process, but can upset glucose control. Thus, continuing to take medications despite poor appetite is vital. You may temporarily require more medication during periods of extended illness. Ask your doctor for instructions on dealing with illness.
6) Monitoring on a more frequent basis and/or monitoring other parameters.
When blood glucose values exceed the target ranges established by you and your doctor, monitoring should be done every two hours until the blood glucose returns to normal. This gives you an opportunity to treat and adjust blood glucose as soon as possible, rather than waiting until your next doctor visit or next meal (which might be four or five hours later). It also tells you whether or not what you are doing is helping to bring the blood glucose down. Other parameters would include ketone checks (done by urine dip stick or via a fingerstick to measure betahydroxybutyrate, an acid) if your blood sugar is over 250 mg/dl. Testing ketones hourly until they disappear is recommended.
7) Increasing consumption of sugar-free fluids.
Often, the poor hydration of some individuals will account for the concentration of sugar in the blood. All people (with diabetes or not) should drink two to three quarts of sugar-free fluids per day. When glucose is elevated, drinking helps to dilute it. Also, drinking fluids is filling, decreasing the possibility of overeating.
People with heart disease who take diuretics and those with renal (kidney) complications may need to be on restricted fluids. Check with your doctor and/or dietitian if you fall into these special categories.
To combat high blood sugars, the most important strategy is prevention. Prevention of high blood sugars is usually possible with frequent and consistent monitoring. If you have awareness of your usual glucose response patterns to foods and exercise, it will be easier to plan out your day and prevent fluctuations in your blood sugar.
Diabetes Health is the essential resource for people living with diabetes- both newly diagnosed and experienced as well as the professionals who care for them. We provide balanced expert news and information on living healthfully with diabetes. Each issue includes cutting-edge editorial coverage of new products, research, treatment options, and meaningful lifestyle issues.