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Pathology - Type 1 Diabetes Mellitus
Type 1 DM is a state of inappropriate hyperglycemia and abnormal metabolism caused by a shortage of insulin secretion. In 95% of type 1 DM patients, the cause is autoimmune destruction of the pancreatic beta-cells that release insulin. In the case vignette, a subacute onset has led in chronic hyperglycemia, evident from the elevated level of glycated hemoglobin (HbA 1c ). Hyperglycemia produces osmotic diuresis, which has resulted in hypovolemia with hypotension, tachycardia, and postural symptoms. Potassium waste from diuresis in combination with metabolic derangements causes to muscle weakness. A shortage of insulin leads to unrestrained glucagon dominance, culminating in hepatic ketone production. Ketosis is evident on urine dipstick and is severe enough to have resulted in ketoacidosis in this case (notice low serum bicarbonate implies metabolic acidosis). Treatment of type 1 DM necessitates replacement of insulin, which commonly combines a long-acting insulin formulation administered at bedtime, with short-acting insulin taken before meals. Patient education is a crucial element of treatment, with the goal of maintaining euglycemia (e.g., indicated when HbA 1c levels are maintained below 7%).
Type 1 DM is a state of inappropriate hyperglycemia and abnormal metabolism caused by a shortage of insulin secretion. In 95% of type 1 DM patients, the cause is autoimmune destruction of the pancreatic beta-cells that release insulin. In the case vignette, a subacute onset has led in chronic hyperglycemia, evident from the elevated level of glycated hemoglobin (HbA 1c ). Hyperglycemia produces osmotic diuresis, which has resulted in hypovolemia with hypotension, tachycardia, and postural symptoms. Potassium waste from diuresis in combination with metabolic derangements causes to muscle weakness. A shortage of insulin leads to unrestrained glucagon dominance, culminating in hepatic ketone production. Ketosis is evident on urine dipstick and is severe enough to have resulted in ketoacidosis in this case (notice low serum bicarbonate implies metabolic acidosis). Treatment of type 1 DM necessitates replacement of insulin, which commonly combines a long-acting insulin formulation administered at bedtime, with short-acting insulin taken before meals. Patient education is a crucial element of treatment, with the goal of maintaining euglycemia (e.g., indicated when HbA 1c levels are maintained below 7%).
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