Risk factors for postoperative cognitive dysfunction in geriatric trauma: a dual-pathway perspective

Area of Science:

• Geriatric Medicine
• Neuroscience
• Trauma Surgery

Background:

• Postoperative cognitive dysfunction (POCD) is a frequent complication in elderly trauma patients.
• Current research often examines isolated risk factors, neglecting their complex interplay.
• A comprehensive understanding of POCD pathogenesis is lacking.

Purpose of the Study:

• To propose a novel dual-pathway theoretical model for understanding POCD in geriatric trauma.
• To reframe the pathogenesis of POCD by considering interacting vulnerabilities and stressors.
• To guide future research directions and clinical strategies for POCD.

Main Methods:

• This is a perspective article, presenting a theoretical framework.
• It synthesizes existing knowledge on central nervous system (CNS) vulnerabilities and peripheral perioperative stressors.
• The model focuses on the interaction between pre-existing CNS deficits and acute perioperative insults.

Main Results:

• POCD in older adults is conceptualized as a "second hit" phenomenon.
• The dual-pathway model highlights CNS vulnerability (e.g., neurodegeneration, low cognitive reserve) and peripheral stress amplification (e.g., trauma, surgery, anesthesia).
• Interactions occur via critical interfaces like the blood-brain barrier and neuroimmune pathways.

Conclusions:

• POCD pathogenesis is multifactorial, involving the interplay of intrinsic vulnerabilities and extrinsic stressors.
• Future research should prioritize dynamic, multidimensional risk assessment over isolated factor screening.
• Developing sequential interventions targeting both CNS and peripheral pathways is crucial for effective POCD management.