为期六个月的研究，比较容量和压力引导调整对减肥和饱腹感的影响

Inclusion Criteria:

• Able to comprehend, follow and give informed consent.
• Be at least 18 years of age at time of trial enrollment.
• Had a pre-implantation BMI between 35 and 55 kg/m2.
• Have received a SAGB VC implant 1) 30-60 days (and not undergone first band adjustment yet)prior to the date of enrollment.
• Willingness to be randomized to intraband-based or conventional adjustments
• Willingness to consent to monthly visits and possible measurements of intraband pressure (requiring access to the injection port).
• Willingness to undergo up to 7 band adjustments within the 6-month period of the study.
• Able to sit approximately at a 90 degree-angle, from the floor, for IBP measurements.
• Willingness to return to office visits around the same time of the first in-study adjustment (plus or minus 2 hours)
• Willingness to consent to a limited UGI series if the investigator suspects the presence of a band-related complication or if the intraband pressure recordings deviate from expected.
• Willingness to refrain from taking medications or supplements indicated for or known to induce weight loss.

Exclusion Criteria:

• Females currently known to be pregnant.
• Ongoing or unresolved band perforation or band leakage.
• Ongoing (unresolved) slippage, erosion, or pouch dilation.
• Documented esophageal dysmotility/dyskinesia.
• Ongoing (unresolved) port obstruction or tube kinking.
• Current injection port infection.
• History of band revision or replacement.
• Previously documented or ongoing esophageal dilatation.
• Any condition that, in the opinion of the Investigator, may jeopardize the subject's well-being or the soundness of this study.
• Current use of medications or supplements indicated for or known to induce weight loss at any point during the study.