Analysis of the association between blood glucose, blood pressure, and blood lipids: interactions and differences in diagnostic criteria.

High blood sugar and high blood pressure are two closely related risk factors present in the bloodstream. They often occur together, interacting and influencing each other, and can also jointly induce other diseases. Studies have found that 25% to 50% of diabetic patients also have hypertension, twice the rate in non-diabetic individuals. Furthermore, the higher the blood sugar level, the greater the likelihood of developing hypertension. In addition, studies show that the peak age of hypertension development in diabetic patients is about 10 years earlier than in those with normal blood sugar levels.

High blood sugar affects hypertension primarily in three ways: First, diabetes causes toxicity to vascular endothelial cells, leading to increased vasoconstriction, thickening of blood vessel walls, narrowing of blood vessel diameter, and increased peripheral resistance, thus raising blood pressure. Second, high blood sugar increases the pressure on glomerular blood vessels, potentially causing kidney damage and inducing hypertension. Third, diabetes damages the vascular endothelium, leading to plaque formation on the vessel walls, which can induce or worsen hypertension due to atherosclerosis.

Hypertension not only induces high blood sugar but also exacerbates its symptoms, causing individuals with impaired glucose tolerance to develop diabetes, or worsening existing diabetes and increasing the difficulty of treatment. The diagnostic criteria for hypertension in diabetic patients differ significantly from those for non-diabetic patients. Generally, a systolic blood pressure above 130 mmHg and a diastolic blood pressure above 100 mmHg are considered diagnostic criteria. There is a close relationship between glucose and lipid metabolism in the body; clinical studies have found that approximately 40% of diabetic patients may develop secondary hyperlipidemia.

In general, insulin-dependent diabetes mellitus patients most commonly exhibit metabolic disturbances in chylomicrons and very low-density lipoproteins (VLDL) in their blood, which is related to the severity of the condition. Severe insulin deficiency, especially in patients with ketoacidosis, results in significant increases in both lipoproteins, manifesting as type I or V hyperlipoproteinemia. Mild cases without ketoacidosis may have no chylomicrons in the blood, and VLDL may be normal or only slightly elevated (type IV hyperlipoproteinemia).

Those with lipoprotein metabolism abnormalities often develop non-insulin-dependent diabetes mellitus, possibly related to the high prevalence of obesity in this type of patient. Clinical observation data indicate that many of these patients do not exhibit obvious symptoms. After controlling weight and restricting carbohydrate intake, the lipoprotein abnormalities in these patients can be improved to some extent.