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Patient computed tomography (CT) data were used to reconstruct realistic SPGJ models. Computational fluid dynamics combined with a discrete phase model quantified velocity, wall pressure, particle\u2010retention time, and velocity under systematic variations of partitioning position (distal, mid, and proximal), partitioning angle (5\u00b0, 15\u00b0, and 25\u00b0; left\u2010 or right\u2010sided), and incision angle (60\u00b0, 75\u00b0, and 90\u00b0). Distal partitioning produced the lowest pressure drop and fastest emptying, whereas proximal partitioning channeled high\u2010speed flow toward the pylorus and prolonged retention. A \u223c15\u00b0 partitioning angle balanced flow restriction and clearance; extreme unilateral angles either increased particle stasis (left\u2010side) or slowed emptying despite reduced reflux (right\u2010side). A vertical incision (90\u00b0) further decreased pressure losses and shortened mean retention relative to oblique cuts. SPGJ biomechanics are highly geometry\u2010sensitive. Distal placement, a 15\u00b0 partitioning angle, and a near\u2010vertical incision collectively optimize flow, reduce lesion contact, and accelerate gastric emptying, providing quantitative guidance for patient\u2010specific SPGJ design.<\/jats:p>","DOI":"10.1111\/nyas.70104","type":"journal-article","created":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T11:46:37Z","timestamp":1761133597000},"page":"227-238","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Biomechanical Impact of Partitioning Position and Angle on Post\u2010SPGJ Gastric Emptying"],"prefix":"10.1111","volume":"1554","author":[{"given":"Zhenmin","family":"Fan","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering Jiangsu University of Technology  Changzhou Jiangsu China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiuliang","family":"Li","sequence":"additional","affiliation":[{"name":"School of 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