Elderly patients with a hip fracture: the risk for delirium

Abstract

This prospective study investigated risk factors for delirium in elderly hip fracture patients that could be recognized by nurses. Data were collected on predisposing and precipitating factors for delirium from 92 elderly patients with a hip fracture. Predisposing factors included age, gender, sensory impairments, functional impairment before the hip fracture, residency before admission, pre-existing cognitive impairment, comorbidities, and medication use. Precipitating factors included factors related to surgery and to the postoperative period. Factors related to surgery included time between admission and surgery, type of surgery, type of anesthesia, duration of surgery and anesthesia, and complications during surgery. Factors studied in the postoperative period were slow recovery, malnutrition, dehydration, addition of three or more medications, introduction of bladder catheter, infections, complications and falls, and use of morphine. Eighteen patients developed delirium, as diagnosed by a geriatrician by using the Diagnostic Statistical Manual-IV criteria. Data on delirious patients were compared with the data on non-delirious patients. The findings confirm that elderly hip fracture patients with premorbid ADL dependency, psychiatric comorbidities (including dementia), and a high number of other comorbid problems are at risk for the development of delirium. Based on these findings, it is recommended that nurses should assess patients' pre-fracture functional and cognitive capacities in an early stage of the hospital stay. Nurses should also be alert to postoperative delirium in "healthy elderly" patients. Monitoring of symptoms postoperatively in all elderly patients is advised.