View clinical trials related to Urological Surgery.
Filter by:Carbon dioxide (CO2) pneumoperitoneum and clasp-knife positioning are commonly used to improve surgical access during robot-assisted laparoscopic urological surgery. However, these methods are sometimes associated with several unwanted cardiopulmonary effects such as increased mean arterial pressure, decreased pulmonary compliance and functional residual capacity, increased peak inspiratory pressure, and respiratory acidosis in association with hypercarbia. Volume-controlled ventilation (VCV) is the most commonly used method of ventilation during general anesthesia. It provides fixed minute ventilation and pulmonary resistance, which affect airway pressure. In pressure-controlled ventilation (PCV), constant inspiratory airway pressure can be achieved by decelerating the flow. However, minute ventilation is not fixed . CO2 pneumoperitoneum in the clasp-knife positioning can influence hemodynamic variables, including blood pressure, heart rate, and cardiac output. This is because changes in airway pressure affect intrathoracic pressure and the function of the heart itself. In this randomized study, we investigated the effects of VCV and PCV on peak inspiratory pressure during robot-assisted laparoscopic urological surgery involving CO2 pneumoperitoneum in the clasp-knife position.
Background: Opioids are a class of drug that are often used to manage pain after a person has surgery. Because of the current opioid crisis, researchers want to improve ways to manage pain after surgery with fewer side effects. To do this, they need to understand pain better. In this study, they want to measure chemical reactions and find genes involved in producing the pain that people feel after surgery. Objective: To find the pain signals starting at the site of skin incision during surgery. Eligibility: People age 18 and older who are having a surgery that will last for at least 4 hours. Design: The participant s primary surgeon will make sure he or she is eligible for surgery. Participants will complete a generalized pain questionnaire before the day of surgery. This will give a baseline measurement. During surgery, 4 to 6 tissue samples at the site of incision will be taken at the following time points: when the surgery starts at 1, 2, 4, and 6 hours when the wound is closed (if the surgery lasts longer than 8 hours). The samples will only be taken if they will not prevent the wound from healing properly. For the first 2 days after surgery, participants will complete short questionnaires about their level of pain. Each will take less than 5 minutes to complete. Their answers will be protected....
Study to investigate the influence of remifentanil and glycopyrrolate on cardiac index and blood pressure in children.To differentiate between contractility and the effect of the circulating volume, some of the subjects will receive additional fluid.This will be evaluated using two transthoracic echocardiac exams within the first 30 min of anesthesia.