Sodium chloride injection, the indications are water loss caused by various reasons, including hypotonic, isotonic and hypertonic water loss; Hypertonic nonketotic diabetic coma can be corrected by using isotonic or hypotonic sodium chloride. Low chlorine metabolic alkalosis; External use of normal saline to wash eyes and wounds. It is also used to induce labor by water bag in obstetrics.

Potassium chloride injection, with the indication of 1, is used to treat hypokalemia caused by various reasons, such as insufficient eating, vomiting, severe diarrhea, application of potassium diuretics, periodic paralysis of hypokalemic families, long-term use of glucocorticoid and supplementation of hypertonic glucose. 2. Prevention of hypokalemia. When patients have hypokalemia, especially when hypokalemia is harmful to patients (such as patients who use digitalis drugs), preventive potassium supplementation is needed, such as eating less, severe or chronic diarrhea, long-term use of adrenocortical hormone, potassium-deficient nephropathy, Barthes syndrome, etc. 3. Digitalis poisoning causes frequent multi-source premature beats or rapid arrhythmia.