Clinical Outcomes After Ventriculo-Peritoneal Shunting in Patients With Classic vs. Complex NPH

Area of Science:

• Neurosurgery
• Neurology
• Geriatric Medicine

Background:

• Normal pressure hydrocephalus (NPH) presents with gait, cognitive, and urinary issues, overlapping with neurodegenerative diseases like Alzheimer's.
• Comorbid NPH and neurodegenerative conditions may still benefit from cerebrospinal fluid (CSF) diversion.
• Differentiating NPH subtypes is crucial for treatment strategies.

Purpose of the Study:

• To evaluate clinical responses to ventriculo-peritoneal shunt (VPS) in patients with coexisting NPH and neurodegenerative disease.
• To compare outcomes between Classic NPH and Complex NPH subtypes.
• To assess the impact of comorbidities on CSF diversion response.

Main Methods:

• A pilot study focused on Complex NPH, followed by a retrospective analysis of Classic vs. Complex NPH patients over one year.
• Utilized clinical risk stratification and multimodal biomarkers for Complex NPH characterization.
• Assessed patient responses after ventriculo-peritoneal shunt (VPS) insertion.

Main Results:

• No significant difference in comorbidity scales between responders and non-responders.
• Classic NPH patients showed significantly greater cognitive improvement post-VPS compared to Complex NPH patients (p=0.005).
• Gait and urinary symptom improvements did not differ; 26% of Classic NPH had triad improvement, while all Complex NPH improved in gait.

Conclusions:

• Neurodegenerative disorders co-existing with NPH should not preclude CSF diversion consideration.
• Further characterization of NPH cohorts can refine prognostication and treatment.
• A Classic vs. Complex NPH subtype framework aids subspecialist geriatric neurosurgery and clinical-research screening.