For people who have really severe acute hyponatremia symptoms, hypertonic IV fluids are usually administered.
对于伴有严重低钠血症的患者，通常需要静脉输注高渗液体进行治疗。
英语百科
Acute (medicine)
In medicine, an acute disease is a disease, a short course, or both.
Acute may be used to distinguish a disease from a chronic form, such as acute leukemia and chronic leukemia, or to highlight the sudden onset of a disease, such as acute myocardial infarction. The word "acute" may also be used in the context of medicine to refer to the acute phase of injury, meaning the immediate post-injury healing processes.