The effect on water and electrolyte excretion is basically the same as furosemide, and its diuretic effect is 20 to 60 times that of furosemide. It mainly inhibits the active reabsorption of NaCl by the thick wall segment of the ascending limb of the renal tubular loop of Henle, and also inhibits the reabsorption of Na+ in the proximal tubule, but has no effect on the distal tubule, so the potassium excretion effect is less than furosemide. It can inhibit the activity of prostaglandin degrading enzymes, increase the content of prostaglandin E2, and thus have a vasodilatory effect. Dilation of renal blood vessels, reduction of renal vascular resistance, and increase of renal blood flow, especially deep renal cortical blood flow, are of great significance in the diuretic effect of bumetanide, and are also the theoretical basis for its use in the prevention of acute renal failure. In addition, unlike other diuretics, loop diuretics increase the flow of renal tubular fluid while the glomerular filtration rate does not decrease, which may be related to the reduction of chloride flowing through the macula densa, thereby weakening or blocking the glomerular-tubular balance. Bumetanide can dilate the pulmonary capacitance veins and reduce the permeability of pulmonary capillaries. Its diuretic effect can reduce the amount of blood returning to the heart and the left ventricular end-diastolic pressure, which is helpful for the treatment of acute left heart failure. Since bumetanide can reduce the permeability of pulmonary capillaries, it provides a theoretical basis for its treatment of adult respiratory distress syndrome.

The effect on water and electrolyte excretion is basically the same as furosemide, and its diuretic effect is 20 to 60 times that of furosemide. It mainly inhibits the active reabsorption of NaCl by the thick wall segment of the ascending limb of the renal tubular loop of Henle, and also inhibits the reabsorption of Na+ in the proximal tubule, but has no effect on the distal tubule, so the potassium excretion effect is less than furosemide. It can inhibit the activity of prostaglandin degrading enzymes, increase the content of prostaglandin E2, and thus have a vasodilatory effect. Dilation of renal blood vessels, reduction of renal vascular resistance, and increase of renal blood flow, especially deep renal cortical blood flow, are of great significance in the diuretic effect of bumetanide, and are also the theoretical basis for its use in the prevention of acute renal failure. In addition, unlike other diuretics, loop diuretics increase the flow of renal tubular fluid while the glomerular filtration rate does not decrease, which may be related to the reduction of chloride flowing through the macula densa, thereby weakening or blocking the glomerular-tubular balance. Bumetanide can dilate the pulmonary capacitance veins and reduce the permeability of pulmonary capillaries. Its diuretic effect can reduce the amount of blood returning to the heart and the left ventricular end-diastolic pressure, which is helpful for the treatment of acute left heart failure. Since bumetanide can reduce the permeability of pulmonary capillaries, it provides a theoretical basis for its treatment of adult respiratory distress syndrome.

Dilate the coronary arteries, femoral arteries, and cerebral arteries, increase cerebral blood flow, strengthen blood circulation in the limbs, reduce blood viscosity, weaken vascular resistance, reduce myocardial oxygen consumption, improve cardiac function, enhance microcirculation, increase peripheral blood flow, change blood rheology, lower blood pressure, and improve heart rhythm

Dilate the coronary arteries, femoral arteries, and cerebral arteries, increase cerebral blood flow, strengthen blood circulation in the limbs, reduce blood viscosity, weaken vascular resistance, reduce myocardial oxygen consumption, improve cardiac function, enhance microcirculation, increase peripheral blood flow, change blood rheology, lower blood pressure, and improve heart rhythm

Puerarin is a flavonoid glycoside extracted from the root of Pueraria lobata or Pueraria lobata, a leguminous plant. It is a vasodilator that can dilate coronary arteries and cerebral blood vessels, reduce myocardial oxygen consumption, improve microcirculation and resist platelet aggregation. Animal experiments have shown that: 1. The various total flavonoid compounds in Pueraria lobata have the effect of relaxing smooth muscles, while the contractile components may be substances such as choline, acetylcholine and carbazine R; 2. Pueraria lobata has a certain antihypertensive effect on normal and hypertensive animals; 3. Pueraria lobata total flavonoids and puerarin have a significant effect of dilating coronary arteries, which can dilate normal and spasmodic coronary arteries. After intravenous injection of 30mg/Kg, coronary blood flow can increase by 40% and vascular resistance can decrease by 29%; 4. Puerarin can also inhibit the release of 5-HT in platelets induced by thrombin.