View clinical trials related to Aneurysm.
Filter by:The purpose of this study is to investigate the mortality and frequency of organ dysfunction in patients after endovascular thoracoabdominal aortic surgery, and to search for biomarkers of organ dysfunction, in particular the spinal cord, the kidneys and the gastrointestinal tract. All adult patients undergoing endovascular thoracoabdominal aortic surgery at Örebro University Hospital, Örebro, Sweden, are asked for participation in this study. All participating patients sign informed consent at the inclusion. During the operation and during the postoperative intensive care, the function of the spinal cord, the gastrointestinal tract and the kidneys are collected along with other clinical parameters. Plasma blood samples, urin samples and cerebrospinal fluid samples are collected from each patient during the operation and during the postoperative care at the intensive care unit. During the operation two microdialysis catheters are placed in the abdomen, and the samples are continuously collected and analyzed. The biomaterial samples are stored in a biobank for later determination of proteins and other molecules. Postoperative survival and the frequency of complications are analysed.
This is a registry study on a multidimensional prediction model for rupture risk of unruptured intracranial aneurysms in China.
This is a registry study of the natural course of unruptured intracranial aneurysms (UIA). In addition, the investigators will analyze the risk factors for the rupture of the UIA and their joint effect. The investigators aim to use research data to create a China national database of UIA.
The primary objective of the clinical investigation is to assess the use of the Medtronic Valiant Thoracoabdominal Stent Graft System to repair thoracoabdominal aortic aneurysms in patients having appropriate anatomy. The primary intent of the study is to assess safety and preliminary effectiveness of the device. Additionally, the study will assess technical success and treatment success at each follow-up interval.
Patients with a thoracoabdominal aortic aneurysm in need of an endovascular or open operative restructuring will be asked to participate in this study. After obtaining written consent a central venous catheter and a liquor drainage will be routinely placed during surgery. The catheter and the drainage will stay in the patients for at least 72 hours postoperatively. In total, nine measurements of the liquor and serum will be performed within a week in order to determine the following parameters: neuropeptide P, neuropeptide Y, neurofilament triplet protein (NFL), S100B, glial fibrillary protein (GFAp), lactate, glucose, or oxygen.
The objective of this study is to establish whether patients with aortic aneurysm, compared to general population, have higher levels of selected miRNAs and whether there is significant association between the level of miRNA in circulating blood and the size of the aortic aneurysm or the risk of its rupture.
In neurosurgical anesthesia, propofol based total intravenous anesthesia (TIVA) is frequently used due to brain relaxation and less effect on electrophysiologic monitoring. Response to propofol can vary between individuals and be associated with clinical factors including age and weight, and genetic polymorphism. Because the importance of rapid recovery in neurosurgery with long operation time is emphasized recently, the choice and dose adjustment of anesthetics should be determined according to clinical and genetic factors. Recently, researches about genetic variations have been performed with single nucleotide polymorphism (SNP). The aim of this study is to find SNPs associated with propofol recovery and response through genome-wide association study (GWAS) in Korean adult population undergoing propofol based TIVA for clipping of unruptured cerebral aneurysm.
During open surgery of a thoraco-abdominal aortic aneurysma (TAAA), diminished blood flow to the myelum can result in hypoxia, compromising proper function of the spinal cord. Intraoperatively, motor evoked potentials (MEP) are elicited to measure the functional integrity of the spinal cord. MEPs have proven to be a reliable marker of spinal cord ischemia. Moreover, these potentials react within minutes, which facilitates interventions to restore the blood flow. Monitoring intraoperatively with this ancillary test has reduced the rate of paraparesis to < 5%. Unfortunately, in the early postoperative period, spinal cord vulnerability is high. Therefore, some patients develop paraparesis, not during the surgical procedure, but after the surgical procedure. Postoperatively, suboptimal blood flow may lead to critical loss of function. This inadequate perfusion results in "delayed paraparesis". In the postoperative patient, it is not possible to measure MEPs when sedation is decreased, due to the high intensity of the electrical stimulus, which is unacceptably painful in the unanesthetized or partially anesthetized patient. Therefore ancillary tests are needed which can detect spinal cord ischemia postoperatively early, thus preceding the phase with clinically overt paraparesis. The test should be reliable and easy to perform for an extended period of time (up to several days). The purpose of this study is to explore the usefulness of various neurophysiological tests regarding accuracy and feasibility for the detection of spinal cord ischemia. In particular, to find a diagnostic test which is acceptable for the unanesthetized or partially anesthetized patient and therefore can also be performed postoperatively. These tests will be examined in fully sedated as well as partially sedated patients. The following candidate tests will be examined: 1. Long loop reflexes (LLR) consisting of F-waves. 2. Oxygenation measurements of the paraspinal muscles using Near-infrared spectroscopy (NIRS).
Forty ASA I or II patients, scheduled for aneurysm clipping were enrolled in this prospective, randomized, controlled study. Those patients were randomly divided into 3 groups: Group B (Scalp nerve block before skin incision n=15), Group I (Scalp infiltration before incision n=15), respectively with 0.75% of ropivacaine, and Group C (the control group, n=15). Opioids were used to control haemodynamic responses.All patients received the same general anesthesia. After intubation, in group B, scalp block was performed by blocking the nerves that innervate the scalp, including the supraorbital, supratrochlear, zygomaticotemporal, auriculotemporal, greater occipital and lesser occipital nerves, and skin along the incision was infiltrated with 0.75% ropivacaine (group I, n = 15), respectively. For group C, there is no treatment. All patients received the same general anesthesia. The depth of anaesthesia was adjusted to maintain a BIS of 40-60. Characteristics of patients were recorded. Heart rate (HR) and mean arterial pressure (MAP) were recorded preoperatively, after induction, before skin incision, the moment of incision, after skin incision. Plasma levels of IL-6, IL-10, CRP were measured before surgery, skin incision,after the surgery. Postoperative pain scores (VAS) for 2, 4, 8, 12, 24, 48 hours after recovery of consciousness were also recorded. Postoperative complications ( nausea, vomiting, infection, and other adverse events) were monitored after surgery.
Purpose of this study is to assess the hypothesis that a strategy with acetylsalicylic acid (ASA) 100 mg/day, intensive blood pressure treatment (targeted systolic blood pressure below 120 mmHg), and a blood pressure measuring device reduces the risk of aneurysm rupture or growth compared with standard care (i.e. no ASA, blood pressure management according to standard blood pressure management, no blood pressure measuring device)