[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"respiratory-physiology\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:respiratory-physiology":29},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,2,0,[8,50],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":16,"sex":17,"minAge":18,"maxAge":19,"enrollmentInfo":20,"targetDuration":4,"studyType":23,"phases":24,"briefSummary":26,"conditions":27,"keywords":32,"overallStatus":38,"whyStopped":4,"lastUpdateSubmitDate":39,"lastUpdatePostDateStruct":40,"startDateStruct":43,"completionDateStruct":45,"leadSponsor":47,"locationsCount":4},"100616312","effects-of-inspiratory-vs-expiratory-breath-hold-on-lung-perfusion-measured-by-eit-saline-indicator-method-a-self-controlled-study-100616312",false,"NCT07303972","Effects of Inspiratory vs Expiratory Breath-Hold on Lung Perfusion Measured by EIT Saline Indicator Method: A Self-Controlled Study","Electrical Impedance Tomography Saline Indicator Technique for Assessing Differences in Lung Perfusion Between Inspiratory and Expiratory Breath-Hold Phases: A Prospective Self-Controlled Study","Inclusion Criteria:\n\n* Age 18 to 65 years\n* Able to provide written informed consent\n* Able to perform standardized inspiratory and expiratory breath-hold maneuvers for at least 8 seconds\n* No known acute cardiopulmonary disease\n* Suitable for noninvasive electrical impedance tomography monitoring and intravenous saline administration\n\nExclusion Criteria:\n\n* Known severe cardiopulmonary disease (e.g., advanced chronic obstructive pulmonary disease, severe pulmonary hypertension, or heart failure)\n* Hemodynamic instability or clinically significant cardiac arrhythmia\n* Contraindication to intravenous saline administration or fluid bolus\n* Pregnancy or breastfeeding\n* Skin conditions or chest wall abnormalities preventing proper placement of EIT electrodes",true,"ALL","18 Years","65 Years",{"count":21,"type":22},100,"ESTIMATED","INTERVENTIONAL",[25],"NA","This study aims to compare lung perfusion distribution between inspiratory breath-hold and expiratory breath-hold phases using the saline indicator method combined with electrical impedance tomography (EIT). A self-controlled crossover design will be used in which each participant undergoes both breath-hold conditions with standardized rapid intravenous saline injections. The primary objective is to evaluate changes in global and regional pulmonary perfusion under different lung volume states. The findings may improve understanding of perfusion redistribution with lung inflation and support optimized ventilatory strategies in clinical practice.",[28,29,30,31],"Lung Perfusion","Respiratory Physiology","Electrical Impedance Tomography","Ventilation-Perfusion Mismatch",[30,28,33,34,35,36,37],"Saline Indicator","Breath-Hold","Inspiratory \u002F Expiratory Phases","Regional Perfusion","Ventilation-Perfusion Matching","NOT_YET_RECRUITING","2025-12-23",{"date":41,"type":42},"2025-12-26","ACTUAL",{"date":44,"type":22},"2026-01-01",{"date":46,"type":22},"2028-01-01",{"name":48,"class":49},"Shanghai Zhongshan Hospital","OTHER",{"id":51,"slug":52,"hasResults":11,"nctId":53,"briefTitle":54,"officialTitle":55,"acronym":4,"eligibilityCriteria":56,"healthyVolunteers":11,"sex":17,"minAge":18,"maxAge":4,"enrollmentInfo":57,"targetDuration":4,"studyType":59,"phases":4,"briefSummary":60,"conditions":61,"keywords":64,"overallStatus":38,"whyStopped":4,"lastUpdateSubmitDate":67,"lastUpdatePostDateStruct":68,"startDateStruct":70,"completionDateStruct":72,"leadSponsor":74,"locationsCount":5},"100575729","the-impact-of-lumboscopy-versus-laparoscopy-on-ventilatory-mechanics-100575729","NCT06776068","The Impact of Lumboscopy Versus Laparoscopy on Ventilatory Mechanics","Comparison of the Impact of Lumboscopy and Laparoscopy on Ventilatory Mechanics in Patients Undergoing Nephrectomy","Inclusion Criteria:\n\n* Age \\>18 years old\n* ASA PS II-III\n* Elective surgery\n* Surgery: Partial or total nephrectomy\n\nExclusion Criteria:\n\n* Severe pulmonary pathology\n* Severe cardiovascular pathology\n* Open surgery",{"count":58,"type":22},40,"OBSERVATIONAL","There are several techniques for performing minimally invasive urological surgeries. Among them, laparoscopic surgery, robotic surgery, and lumboscopy are noteworthy (1). The medical literature extensively documents the impact of pneumoperitoneum a procedure involving the insufflation of the peritoneal cavity with carbon dioxide (CO2), which is essential for laparoscopic and robotic surgeries on ventilatory mechanics.\n\nAs an alternative, CO2 insufflation into the retroperitoneum, as utilized in lumboscopic surgery, has been proposed. This approach is believed to exert a lesser impact on respiratory function and pulmonary mechanics. However, it is important to note that no conclusive evidence has yet been found to support this claim.\n\nAssessing the impact of lumboscopic surgery could help establish it as a viable alternative for patients with pulmonary conditions, where mechanical ventilation poses significant challenges. To explore this possibility, a physiological study was designed to compare the effects of laparoscopic and lumboscopic surgery on ventilatory mechanics.",[62,63,29],"Anesthesia","Mechanical Ventilation",[62,65,63,66],"Lumboscopy","Laparoscopy","2025-01-09",{"date":69,"type":42},"2025-01-15",{"date":71,"type":22},"2025-02-01",{"date":73,"type":22},"2026-03-30",{"name":75,"class":49},"University of Chile"]