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Perfusion; Complications clinical trials

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NCT ID: NCT06405282 Completed - Clinical trials for Perfusion; Complications

Weightlessness Associated Cephalad Fluid Shifts; The Potential to Evaluate Venous and Lymphatic Dysfunction

NIID
Start date: April 14, 2022
Phase:
Study type: Observational

In the weightlessness of space and significant alterations of terrestrial 1 g (1 gravity equivalent) head-to-foot hydrostatic pressure gradients, astronauts experience a dramatic fluid redistribution of ~ 2 liters from the legs to the head and neck within the first 24-48 hours of flight, among other cardiovascular and physiologic system adaptations. After only 4 days in the weightlessness of low earth orbit (LEO), changes can be seen in baroreceptor responsiveness, causing orthostatic hypotension upon subsequent return to Earth. Fluid shifts may also result in headaches, congestion or facial puffiness that can contribute to deteriorating sleep patterns. The ability to manage, mitigate, or offset these fluid shifts is vital to maintain nominal health for short and long duration space flight and potentially improve readaptation to terrestrial gravity or other surface gravity fields, such as the moon or Mars. Fluid shifts towards the cephalic region during microgravity have been speculated to contribute towards spaceflight associated neuro-ocular syndrome (SANS). SANS is a distinct, microgravity-induced phenomenon of neuro-ophthalmic findings observed in astronauts following long-duration spaceflight including choroidal folds, optic disc edema, posterior globe flattening, refractive shift, and cerebral fluid shifts noted to be persistent at 6-month post-flight MRI scans. Thus, noninvasive approaches to studying real-time fluid shifts in weightlessness could serve as critical areas of research to further SANS study and effective countermeasure protocol development. For continuous fluid shift monitoring and management, the goal is to establish baseline assessments utilizing real-time point- of-care noninvasive imaging devices (NIID). Manual lymphatic drainage (MLD) therapy reduces lymphatic fluid in the affected limb, head, and neck to improve function and prevent progression of fluid build-up. MLD is a therapeutic massage that delivers light pressure through the skin to stimulate lymphatic vessel function. Randomized controlled trials have demonstrated statistically significant improvements in lymphatic function and pain following MLD. The main objectives of this pilot, retrospective study were to use NIID to examine temperature differential alterations, superficial venous flow patterns (head, neck, upper torso), and venous flow patterns along the lymphatic ventromedial bundles of the medial calves and thighs when in the 6-degree head down tilt (HDT) validated space analogue position and to analyze the effect of MLD therapy administered in the HDT position on lymphatic flow and temperature. HDT is the best validated space analogue currently available for evaluation of fluid redistribution in a timely manner.

NCT ID: NCT06254833 Recruiting - Clinical trials for Perfusion; Complications

Microdosing ICG for Serial Colonic Perfusion Study During Surgery

Start date: November 1, 2023
Phase: N/A
Study type: Interventional

using microdosing of ICG vs regular dosing of ICG for perfusion assessment during surgery

NCT ID: NCT06077396 Not yet recruiting - Clinical trials for Perfusion; Complications

Does Radial Artery Cannulation Affect the Perfusion Index(PI) of the Hand in Liver Transplant Operations?

Start date: March 1, 2024
Phase: N/A
Study type: Interventional

radial artery cannulation is performed by an experienced person, non-invasive blood pressure measurement will be made at 3 stages of the operation (dissection, anhepatic, neohepatic) and the effects of radial artery cannulation on the perfusion index will be evaluated by recording the correlation between radial artery and invasive measurements and the perfusion indexes of both hands simultaneously with Masimo.

NCT ID: NCT06047158 Recruiting - Stomach Neoplasms Clinical Trials

Effects of Omega-3 Fish Oil Fat Emulsion on Rehabilitation and Immune Function After Radical Surgery Combined With Intraperitoneal Hyperthermic Infusion Chemotherapy in Patients With Locally Advanced Gastric Cancer

Start date: December 1, 2022
Phase:
Study type: Observational

The purpose of this study was to investigate the effects of omega-3 fish oil fat emulsion on peripheral blood C-reactive protein, total lymphocyte count, plasma albumin and immune function after radical surgery combined with intraperitoneal hyperthermic perfusion chemotherapy in patients with locally advanced gastric cancer. at the same time, to explore the effects of omega-3 fish oil fat emulsion on complications, length of stay and total cost of hospitalization. The main question it aims to answer is whether the use of omega-3 fish oil fat emulsion can improve patients' immunity, speed up recovery and reduce costs. Participants will comprehensively collect patient-related baseline data, including sex, age, BMI, ASA grade, tumor location, histological grade, pathological tumor type, pTNM stage (AJCC cancer stage 8), and perilymphatic vascular / nerve infiltration. Immune function evaluation related index: peripheral blood lymphocyte count. Plasma albumin concentration, C-reactive protein, postoperative infectious complications, length of stay and cost of hospitalization. Finally, statistical analysis software was used to analyze the differences between the two groups, evaluate the above indicators and draw mutual conclusions.

NCT ID: NCT06019546 Recruiting - Acute Kidney Injury Clinical Trials

PErfusion QUality ODds

PEQUOD
Start date: January 23, 2023
Phase:
Study type: Observational

Cardiac surgery-associated acute kidney injury (CSA-AKI) is a frequent complication after cardiac operations with cardiopulmonary bypass (CPB) use. Its frequency varies depending on the severity grade. There are different "static" predictive scores for the CSA-AKI based on the patient and surgery-associated parameters. Recently, in our Institution was developed a predictive algorithm for CSA-AKI that starts with a static model and then integrated with 7 CPB-associated parameters: HCT, DO2, time of exposure to a critical DO2, systemic pressure, CPB duration time, lactate value, transfusion of red blood cells (RBC), that together build a dynamic perfusion risk (DPR) associated to the CPB. Combining the static and dynamic models produces the Multifactorial Dynamic Perfusion Index (MDPI). The present study validates MDPI in a new prospective series of patients undergoing cardiac surgery with CPB.

NCT ID: NCT05517044 Active, not recruiting - Clinical trials for Perfusion; Complications

The Pre-acclimatization Augmented Extreme Altitude Expedition

PRAGMAX
Start date: August 4, 2022
Phase: N/A
Study type: Interventional

The aim of this study is to investigate the effect of pre-acclimatization in a nitrogen tent at home, ventilated with a slightly increased nitrogen percentage, in preparation for an expedition at extreme altitude. Specifically, the current study aims to gather knowledge, whether pre-acclimatization, first, leads to improved capillary function during an expedition to extreme altitude, and second, affects incidence of altitude sickness and the likelihood of reaching the expedition destination without oxygen supplementation. The project will be carried out in two phases corresponding to two randomized controlled trials in healthy volunteers, who are participating in an expedition at extreme altitudes with or without pre-acclimatization.

NCT ID: NCT05492968 Recruiting - Cardiac Output, Low Clinical Trials

The Effect of Epinephrine, Norepinephrine and Phenylephrine on Intraoperative Hemodynamic Performance

RACE
Start date: September 1, 2022
Phase: Phase 4
Study type: Interventional

The use of catecholamines for blood pressure and hemodynamic management is essential during undergoing surgery. The type of the catecholamine with the most clinical meaningful effect is still unknown. Therefore, the investigators evaluate the effect of intraoperative continuous infusion of epinephrine, norepinephrine and phenylephrine on intraoperative cardiac output. The investigators further evaluate the effect of epinephrine, norepinephrine and phenylephrine on regional brain and regional tissue oxygenation during surgery.

NCT ID: NCT05276167 Recruiting - Clinical trials for Intraoperative Complications

Hyperthermic Intravesical Perfusion for Muscle-invasive Bladder Urothelial Carcinoma

Start date: June 6, 2022
Phase: N/A
Study type: Interventional

To evaluate the effect of hyperthermic intravesical perfusion on the risk of intraoperative implantation of muscle-invasive bladder urothelial carcinoma and its safety.

NCT ID: NCT04929873 Recruiting - Clinical trials for Perfusion; Complications

Clinical Study of VA-ECMO Remote Limb Re-perfusion Monitoring Technology

Start date: January 1, 2020
Phase: N/A
Study type: Interventional

Establish and verify the feasibility and effectiveness of VA-ECMO remote limb re-perfusion monitoring technology.

NCT ID: NCT04907071 Not yet recruiting - Aortic Dissection Clinical Trials

Intravascular Ultrasound for the Evaluation of Malperfusion Syndrome in the Setting of Acute Aortic Dissection

Start date: March 1, 2022
Phase: N/A
Study type: Interventional

Aortic dissection is a life-threatening condition caused by a tear in the internal layer of major artery wall (aorta) that carries blood to all body organs, resulting in separation of the aortic wall layers (dissection). The dissected aorta compromises blood flow to any organ, and eventually leads to organ damage (Malperfusion Syndrome). Our goal in this project is to use Intravascular Ultrasound (IVUS) to have real time assessment and confirm any evidence of malperfusion syndrome in the setting of aortic dissection after repairing the original aortic tear. IVUS is a small ultrasound (sound waves) wand that is attached to the top of a thin tube. This tube is inserted into the aorta from the groin. This device takes pictures of the aorta and its major branches, to identify problems with blood flow. Having this real-time and dynamic assessment will help to identify any malperfused organs before leaving the operating room and allow us to address the malperfusion syndrome as quickly as possible to limit complications. Without this technique, identifying the problem can take several days after surgery at which point there can be irreversible complications.