Final answer:
The ICD-10 code for hydrocephalus normal pressure is G91.2, which is diagnosed through imaging such as MRI and involves enlargement of ventricles due to cerebrospinal fluid accumulation.
Step-by-step explanation:
The ICD-10 code for hydrocephalus normal pressure is G91.2. This condition is characterized by the enlargement of the brain's ventricles due to an accumulation of cerebrospinal fluid (CSF). Normal pressure hydrocephalus (NPH) exhibits a triad of symptoms: gait disturbances, urinary incontinence, and dementia. The condition often requires medical attention, such as surgical intervention with shunt placement, to manage the symptoms and prevent progression. Diagnosis usually involves imaging studies such as an MRI, which can reveal enlarged ventricles, indicative of hydrocephalus.
Biochemical constituents of the CSF show that normal fluid is watery with low viscosity, and the specific gravity ranges from 1.003 to 1.008. CSF pressure in a healthy individual ranges from 60-100 mm H₂O, or 4.4 -7.3 mm Hg. However, in patients with hydrocephalus, these pressure values may be altered despite the term 'normal pressure' used in the categorization of NPH.