The normal value of fasting blood glucose is 3.9-6.1 mmol/L, and the normal range of 2h postprandial blood glucose should be less than 7.78 mmol/L. If the test result of blood glucose is 27 mmol/L, it is a serious high blood glucose, which can lead to a series of acute and chronic complications in the body, and in serious cases, it can threaten the patient’s life, and the patient should immediately go to the hospital for rehydration, sugar reduction, correction of acidosis, correction of The patient should immediately go to hospital for rehydration, hypoglycemia, correction of acidosis, correction of electrolyte imbalance and other related treatments to bring down the blood sugar to a safe range as soon as possible. I. Complications 1. ketoacidosis: Due to the absolute or relative insufficiency of insulin secretion in the patient’s body and the absolute or relative increase of hormones antagonizing insulin, thus promoting the metabolic decomposition in the body and generating more ketone bodies, eventually causing ketoacidosis, which can cause metabolic acidosis, severe water loss, electrolyte balance disorder and cerebral hypoxia in patients; 2. hyperglycemic osmotic coma: As the blood sugar in the body reaches 27mmol/L, insulin sensitivity to it decreases, insulin secretion decreases, hepatic glycogen decomposition increases, severe hyperglycemia and glycosuria cause osmotic diuresis, often causing symptoms such as pulmonary infection, cerebral thrombosis, and blurred consciousness; 3, atherosclerosis: due to the untreated elevation of blood glucose in the body, lipid and complex sugar accumulation, bleeding and thrombosis will occur in the blood vessels, and the middle layer of arteries The gradual metamorphosis and calcification of the arteries will cause ischemia or necrosis in the tissues or organs supplied by the arteries, which can cause the decline of cardiovascular and cerebrovascular functions, and patients may suffer from angina pectoris, intermittent claudication and gangrene of the lower limbs; 4. Diabetic retinopathy: the high glucose status of the body can cause the thickening of the capillary basement membrane, producing microangiomas, capillary occlusion and hypoxia, the blood vessels are more fragile and more likely to traction retinal detachment The patient may experience vision loss, and in serious cases, blindness; 5. diabetic nephropathy: the patient’s body is in a long-term high sugar state, which can cause renal microangiopathy, increased renal pressure, the patient can appear hypertension, large amounts of proteinuria and edema symptoms, if not treated in a timely manner, in serious cases, renal failure; 6. polyneuritis: the patient can cause abnormal sensation of the extremities, manifested as sensory allergy In the presence of trauma, due to the easy complication of various bacterial and fungal infections, resulting in wound healing difficulties, serious conditions can occur in systemic infection and osteomyelitis, etc., which may lead to amputation if not actively treated. Second, treatment 1, rehydration: according to the water loss, the amount of rehydration fluid is calculated by 10%-15% of body weight, 1/3 of the total amount should be input within 4h, the rest should be infused within 12-24h, the amount and speed of rehydration fluid can be determined according to the central venous pressure, red blood cell pressure volume, the average amount of urine per minute, if the patient appears shock, should first actively correct shock, and then treatment; 2, hypoglycemia: according to the specific situation of the patient 2.Correcting acidosis: the patient can be supplemented with sodium bicarbonate according to the patient’s specific condition, and generally need to be rechecked again after 4-6h. If the bicarbonate is greater than 10mmol/L, the alkaline supplementation needs to be stopped; 4.Correcting electrolyte imbalance: the patient can be supplemented with potassium according to the amount of urine Timely potassium supplementation, at the same time to prevent causing hyperkalemia, to be monitored by blood potassium measurement results and ECG examination results; 5. Treatment of complications: according to the complications that occur in different patients, it is necessary to actively treat them according to the type of complications. Such as for diabetic nephropathy, in addition to the need to control blood sugar through diet control and increased exercise, oral hypoglycemic drugs should be used for treatment, such as gliclazide, metformin, Reglanet, etc. When diabetic nephropathy causes hypertension, antihypertensive drugs should be applied to control hypertension, reduce proteinuria and slow down the progression of renal function, which are commonly used in captopril, fosinopril, colesartan, valsartan, etc. If patients with diabetic nephropathy develop renal insufficiency, renal replacement therapy, such as hemodialysis, peritoneal dialysis and kidney transplantation, is required.