Active clinical trials for "Postoperative Cognitive Complications"

One-lung ventilation (OLV) may cause negative changes in the oxygenation of cerebral tissue which results in postoperative cognitive dysfunction. The aim of this prospective study was to compare the potential effects of TIVA and inhalation general anesthesia techniques on cerebral tissue oxygenation and postoperative cognitive functions in patients receiving one-lung ventilation in thoracic surgery

There is lack of attention to preoperative cognitive function and delirium in elderly who underwent surgery. The investigators are investigating different tools that can help to screen for cognitive dysfunction and delirium in the future.

The purpose of this study is to determine the effect of desflurane on postoperative cognitive dysfunction

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 cognitive dysfunction (POCD) occurs mainly in aged patients. POCD may increase the mortality and morbidity. However, the mechanism of POCD is not clear yet and no effective therapy method was proved. According to our previous study, the central cholinergic system impaired by the anesthesia and surgery play a very important role in the POCD and donepezil an acetylcholinesterase inhibitor can prevent the POCD after isoflurane anesthesia in aged mice. Donepezil is a commercial medicine used for the Alzheimer Disease, which is tolerable and has minimal adverse events. In present study a multi-center randomized case control study was conducted and we hypothesized that donepezil attenuate the POCD.

The purpose of this study is to investigate whether the depth of anesthesia with propofol affects the incidence of early postoperative cognitive dysfunction

Recent data suggests that anesthetics can have prolonged effects on gene expression, protein synthesis and processing as well as cellular function in ways that the investigators are only beginning to understand, especially in the very young and the elderly. Within moments to days of emerging from anesthesia - cardiac or non-cardiac - some patients experience mild to very severe disorientation and changes in memory and thinking ability without apparent cause. For the vast majority of patients, this Post-Operative Cognitive Dysfunction (POCD), generally subsides, but for some with "diminished cognitive reserve" - especially the elderly, those with less education or prior CNS events such as stroke or early dementia - changes in memory and executive function may persist. If prolonged for more than three months, POCD has been linked to an increased risk of death. In 1-2% of elderly patients, the problem may ultimately continue for more than a year, leading to a loss of ability to care for themselves and early demise. Though this may seem like a small percentage, seniors will comprise up to 40% of the 50-75 million surgical procedures performed annually over the next 20-30 years. This amounts to 70,000 - 200,000 elder affected, and for them and their families, the cost of POCD in longer-term care, lost wages, and extended suffering will remain very high.

Currently it is unknown how the human brain reorganizes its network organization to generate conscious experience and cognitive activity after a period of unconsciousness. Therefore, the purpose of this study is to assess how cognitive activity is reconstructed after general anesthesia. The investigators hypothesize that the brain's transition from unconsciousness to consciousness and full cognition is a complex process that occurs over an extended period of time. Specifically, the investigators hypothesize the following order of cognitive reconstitution: responsiveness to command, attention, complex scanning and visual tracking, working memory, and executive function. Volunteers will be healthy participants who are anesthetized with commonly used anesthetic drugs as well as a non-anesthetized group to control for circadian influences. A total of 60 subjects will be recruited for this study. All subjects (male and female) will perform basic tests for cognition on a laptop computer at 30-minute intervals during this study. The testing battery to be administered was assembled to assess multiple cognitive functions in order to determine whether and how cognitive processes return to baseline function. Electroencephalogram (measuring brain electrical activity) data will be monitored and recorded during both anesthesia and cognitive testing, for subsequent analysis. This study is significant because it could lead to a better understanding of the neural correlates of human consciousness, as well as normal and abnormal conscious state transitions (including barriers to such transitions).

This study is to explore the effects of dexmedetomidine on postoperative cognitive dysfunction during one-lung ventilation in elder patients.

Post-operative cognitive dysfunction is a common disease in patient undergoing general anaesthesia, especially in older patients. No correlations have been yet studied between intraoperative hypothermia and incidence of Post-operative cognitive dysfunction. Investigators are going to estimate the Relative Risk of Hypothermia and emergence of Post-operative cognitive dysfunction in cardiac-surgery patients.