Volume-challenge in Morbid Obesity
|Study Design:||Observational Model: Case-Crossover
Time Perspective: Prospective
|Official Title:||Morbid Obesity and Optimization of Preoperative Fluid Therapy|
- level of venous return [ Time Frame: 0,1 hour ] [ Designated as safety issue: No ]
- Volume-responsiveness [ Time Frame: 0,1 hour ] [ Designated as safety issue: No ]
- Evaluation of feasibility of dynamic and non-dynamic echocardiographic indices for volume challenge [ Time Frame: 1 hour ] [ Designated as safety issue: No ]
|Study Start Date:||March 2011|
|Study Completion Date:||April 2013|
|Primary Completion Date:||April 2013 (Final data collection date for primary outcome measure)|
preoperative venous return optimizing
Morbidly obese patients scheduled for bariatric surgery
Other: preoperative venous return optimizing
Preoperative transthoracic echocardiography (TTE) was performed in the awake state before and after volume challenge based on 6ml colloids /kg ideal body weight.
34 morbidly obese patients scheduled for bariatric surgery underwent a preoperative three-week preparation by rapid-weight-loss-diet (RWL) to be accepted for bariatric surgery. Preoperative transthoracic echocardiography (TTE) was performed in the awake state before and after volume-challenge (VC) based on 6ml colloids /kg IBW. Feasibility of standardized VC was evaluated by TTE. Dynamic and non-dynamic echocardiographic indices for VC were studied.
Main outcome measures: Volume-responsiveness and level of venous return before and after volume-challenge were assessed by TTE. An increase of stroke volume ≥ 13% was considered as a volume-responder.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01748513
|Sunderby county hospital|
|Lulea, Norrbotten, Sweden, 97180|
|Principal Investigator:||Tomi P Pösö, MD||Norrbotten county council, Umeå University|