View clinical trials related to Post Operative Cognitive Dysfunction.Filter by:
This study will recruit patients more than 65 years old eligible for non-cardiac surgery. Patients who participate will take either vitamin B12 and folic acid supplementation or placebo for 7 days before surgery. Neuropsychological test battery (NPB) will be tested before intervention and at discharge for determination of Post operative cognitive dysfunction (POCD). Another group of non-surgical elderly participants will also be tested for NPB to account for learning effect in POCD diagnosis. The hypothesis is that preoperative vitamin B12 supplementation will reduce the incidence of POCD in elderly patients undergoing non-cardiac surgery.
Post-operative cognitive dysfunction is defined as a decrease in cognitive functions which develop following surgery and anesthesia administration that can last up to weeks or even months after surgery. In this study, our main objective was to investigate the effect of preoperative hospitalisation period on early post operative cognitive dysfunction development and its risk factors in patients who underwent total hip replacement surgery for hip fractures under regional anesthesia.
Postoperative delirium is a frequent complication of major surgery and affects 10% to 70% of surgical patients > 60 years. Delirium is associated with increased morbidity and mortality, prolonged recovery, functional and cognitive dysfunction with nursing home or long-term care facility placement. The acute deterioration in cognition and psychomotor agitation frequently seen with delirium is often distressing for both patients and their relatives. The pathophysiology and causal relationship between delirium and persistent postoperative cognitive dysfunction remain incompletely understood. Identified clinical risk factors for both include advanced age, type of surgery, preexisting cognitive impairment, and drug addiction. The inflammatory response triggered by surgical trauma and pain may contribute to the development of delirium and cognitive impairment after surgery. Ketamine, a N-methyl-D-aspartic acid receptor antagonist, is commonly used in anaesthesia and postoperative analgesia. By reducing both pain and glutamate excitotoxic effects on neuronal and microglial brain cells, it contributes to tone down the neuroinflammatory process associated with surgery. A recent body of evidence has shown that ketamine reduces the depressive-like behavior induced by inflammatory or stress-induced stimuli in mice. Ketamine was also found to reduce by 28% the absolute risk of postoperative delirium and levels of inflammatory biomarkers in cardiac surgical patients. Orthopaedic surgery is a high-risk situation for developing postoperative delirium. In patients undergoing total hip or knee replacement, the prevalence (incidence, respectively) of delirium is 17% (12-51%, respectively) and it is associated with a 6-fold increase increased risk of developing dementia and cognitive dysfunction after surgery. Hundred thousands of patients > 60 years undergo elective orthopaedic procedures per year around the world. The purpose of the study is to assess the superiority of ketamine at subanaesthetic dose versus placebo to reduce the incidence of postoperative delirium in patients aged ≥ 60 years undergoing elective orthopaedic surgery under general anaesthesia.
BACKGROUND: Post-operative cognitive dysfunction (POCD) is a potentially irreversible loss of brain functions observed in elderly patients after surgical operations under general anaesthesia. POCD at 3 post-operative months is observed in up to 15% of patients aged 70 years and more, and the only recognized risk factor for this condition is increasing age. Importantly, the incidence of POCD at 3 months has been associated to an increased disability and mortality. OBJECTIVES: The present study will evaluate in patients aged 75 years and older undergoing general anaesthesia for non-cardiac surgery, whether an hemodynamic strategy, aiming at maintaining intra-operative arterial blood pressure close to patient's preoperative blood pressure, i.e., to avoid hypotensive episodes, reduces the incidence of POCD at three months. METHODS: Around 1800 consecutive patients scheduled to undergo general anaesthesia for elective non-cardiac surgery will be enrolled. Each patient's cognitive function will be evaluated preoperatively and at 3 months and 1 year postoperatively, together with the occurrence of hearing loss and vestibular function impairment. Furthermore, the incidence of postoperative delirium and cardiovascular, respiratory and infectious complications will be evaluated. EXPECTED RESULTS: The primary outcome is a 25% relative reduction in the incidence of POCD at 3 postoperative months. Secondary outcomes are the reduction of POCD incidence at 1 postoperative year, a reduction in postoperative hearing loss and vestibular impairment at 3 months, a reduction in the incidence of delirium. Hospital length of stay and 90 day mortality will also be assessed. This present study could have a high socio-economic impact, reduce healthcare costs and patient morbidity and mortality with a simple not expensive intraoperative intervention.
Post operative cognitive dysfunction (POCD) is recognized as a frequent complication after both cardiac and non cardiac surgery, affecting approximately 1/3 of the patients. The aim of this study is to examine the possible effect of the novel reversal agent sugammadex versus neostigmine/ atropine combination on cognitive function of adult patients after elective surgery during the early post operative period as well as at discharge.
The aim of this study is to investigate whether methylphenidate (Ritalin) can actively induce emergence from general anesthesia in patients having a pancreaticoduodenectomy (Whipple procedure), a pancreatectomy, or a prostatectomy.
This study will examine the hypothesis that changes in the cognition (i.e. thinking and memory) after anesthesia and surgery are correlated with changes in markers of Alzheimers Disease in the fluid around the brain and spinal cord (i.e. cerebrospinal fluid, or CSF), and/or changes in brain connectivity. The investigators will also examine whether different types of anesthesia have different effects on these CSF markers of Alzheimers disease, or different effects on thinking and memory after anesthesia and surgery, or differential effects on the correlation between cognitive changes and CSF marker changes.
This study proposes a prospective randomized study of elders undergoing elective major abdominal surgery to assess recovery following a unique anesthetic regimen incorporating a adrenergic receptor antagonist. The purposes of this study are to: 1. to determine if using atenolol, a beta-blocker drug commonly used to treat high blood pressure and heart disease, as part of your anesthetic regimen will decrease complications that sometimes occur in elderly patients who are undergoing surgery and being given anesthesia. 2. to see if it improves or quickens your recovery from anesthesia and surgery. 3. to help investigators design better ways to administer anesthesia during surgery, especially in elderly patients, so that the complications and the time to recover from surgery and anesthesia can be decreased.