View clinical trials related to Cardiopulmonary Bypass.
Filter by:The optimal heparin regimen during cardiopulmonary bypass (CPB) has not been well established in obese patients. Results of a preview study show that the standard heparin management based on total body weight in obese patients during CPB resulted in excessive heparin level, which could lead to excessive postoperative bleeding. To avoid this overdosing, an initial heparin bolus based on ideal body weight in obese patients was proposed. The main objective of the study is to evaluate the effects of heparin injection, based on ideal body weight, on intraoperative plasma heparin levels and activated coagulation time (ACT) in a population of obese patients, compared to a group of obese patients undergoing CPB surgery with heparin management based of total body weight. The secondary objectives are to evaluate the relationship between heparin level and ACT in each group of patients and at different time points during CPB, and to compare the incidence of bleeding, intraoperative transfusions and complications in the two groups of patients.
Due to various causes, such as brain impairment, environment changes, anxious,et al. patients, who undergo cardiopulmonary bypass, often suffer from poor quality of sleep. In chinese traditional medicine, acupuncture can improve the quality of sleep in patients with sleeping disorder. But it remains acupuncture could improve the quality of sleep in patients with heart operations.
The purpose of this study is to characterize blood flow in the plastic tubing of a heart-lung bypass machine during heart surgery. Technical specifications provided by the manufacturer do not consider varying hemodynamic conditions such as temperature and hemoglobin levels which affect blood viscosity and ultimately blood flow to and from the patient during heart-lung bypass. The investigator wishes to perform a prospective study of the heart-lung bypass tubing in children that require heart-lung bypass during heart surgery.
Non-invasive assessment of blood flow to organs has long challenged clinicians. Recently, near infrared spectroscopy (NIRS) has been recognized as a methodology that may achieve this goal. A commercially available NIRS monitor, marketed by Somanetics, Inc., is now in widespread use in the clinical care of pediatric cardiac patients in the operating room and in the intensive care unit post-operatively. When a patch/probe from the monitor is placed on the forehead or lower back, blood oxygen concentration data is obtained which has been found to correlate with actual blood samples taken by IV. The presence of this NIRS data would give the surgeon important feedback about blood flow to important areas like the brain and kidneys during heart surgeries on children and after the operation is completed in the intensive care unit. The investigator wishes to perform a prospective study of the NIRS monitor use with children that need heart surgeries that require heart-lung bypass and sometimes require monitoring in the ICU, post-operatively.
Does pre-operative administration of Sildenafil (Viagra, Pfizer) reduce the lung injury associated with cardiopulmonary bypass in children undergoing corrective surgical repair of congenital heart disease.
Blood activation induced by cardiopulmonary bypass may compromise the postoperative outcome. The goal of this study is to compare blood activation induced by cardiopulmonary bypass performed with centrifugal pump or roller pump in patients undergoing coronary artery surgery.
Patients undergoing cardiac surgery with cardiopulmonary bypass require significant fluid administration. Fluids are used routinely to replace blood lost during and after surgery. Significant amounts of fluid are also used to prime the tubing and components of the cardiopulmonary bypass pump before and during its use. The use of Pentaspan - a synthetic pentastarch - was started because of the restriction of use for blood and blood products, particularly albumin. Pentaspan is usually used after surgery in the Intensive Care Unit (ICU). The impact of the use of pentastarch on coagulation, fluid balance and bleeding are very limited. This study will methodically evaluate the impact of using increasingly greater amounts of pentastarch during surgery on an open heart surgery patient's recovery in particular - is there more bleeding, does his/her blood clot as well, and how much fluid overall is used and excreted?