A rolling instrument for rolling the outside surface of the stomach for reducing stomach volume in bariatric surgery includes an elongated tubular body that is sufficiently flexible to allow for access to the outside surface. The tubular body includes a proximal end and a distal end. The proximal end is shaped and dimensioned for use by the medical practitioner performing the medical procedure and includes a handle for manipulation of the rolling instrument. The distal end of the tubular body includes a mechanism allowing for gripping of the stomach in a manner permitting rolling thereof. A coiled retainer shaped and dimensioned is provided for application to the rolled portion of the stomach in a manner holding the rolled portion of the stomach in its rolled configuration. The coiled retainer includes a helically coiled body having a first end and a second end, the first end is pointed such that it may puncture tissue as the coiled body is rotated during its application to the stomach.

 
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