Study of Postoperative Delirium in Elderly People After Orthopedic Surgery

POD and Non-POD;

Trained clinical research assistants interviewed the patients on the first and second day post surgery. The assessment of post deliriu (POD) was performed once per day between 8:00 AM to 10:00 AM. Patient notes were not reviewed for episodes of delirium which could occur outside the time of assessment. The clinical research assistants who performed the delirium assessments in this study had good training and went through quality control procedures. We used state-of-the-art delirium detection methods, which tend to report a higher incidence of delirium. The interview included the Confusion Assessment Method (CAM) and Memorial Delirium Assessment Scale (MDAS).

其他：interview

Trained clinical research assistants interviewed the patients on the first and second day post surgery. The interview included the Confusion Assessment Method (CAM) and MDAS. CAM is a diagnostic algorithm used to determine the presence or absence of delirium.

The level of microRNA in cerebrospinal fluid and serum

All of the participants had spinal anesthesia for the scheduled surgery. Two milliliter of CSF was collected from a spinal needle by anesthesiologists during the spinal anesthesia before the administration of the local anesthetic. Blood samples were collected from patients prior to spinal anesthesia.