Other diagnostic studies for diagnosis of gastroparesis include 13C-octanoic acid breath test, the SmartPill wireless motility capsule (WMC) system, and electrogastrography. All of them could measure the gastric motility and recognize delayed gastric emptying. Electrogastrography is useful for differentiating gastroparesis from functional dyspepsia by identifying underlying myoelectrical activity.
13C-octanoic acid breath test may be helpful for diagnosis of gastroparesis. Features of breath test suggestive of a diagnosis of gastroparesis include:[1][2][3]
In antroduodenal manometry, a water-perfused or solid-state manometric catheter is passed from the nares/mouth and placed fluoroscopically into the stomach and small bowel to measure the gastroduodenal contractile activity.
Motor patterns of gastroparesis in antroduodenal manometry includes:[8][9]
Postprandialantral hypomotility due to infrequent contractions and/or low amplitudes
Abnormal propagation of antroduodenal contractions
Increased pyloric spasms which are characterized by an increased tonic and phasic activity
Abnormal migrating motor complexes (MMC), less frequently originating from the stomach
↑Zahn A, Langhans CD, Hoffner S, Haberkorn U, Rating D, Haass M, Enck P, Stremmel W, Rühl A (2003). "Measurement of gastric emptying by 13C-octanoic acid breath test versus scintigraphy in diabetics". Z Gastroenterol. 41 (5): 383–90. doi:10.1055/s-2003-39331. PMID12772050.
↑Tang, Derek M.; Friedenberg, Frank K. (2011). "Gastroparesis: Approach, Diagnostic Evaluation, and Management". Disease-a-Month. 57 (2): 74–101. doi:10.1016/j.disamonth.2010.12.007. ISSN0011-5029.
↑Koch, Kenneth L.; Calles-Escandón, Jorge (2015). "Diabetic Gastroparesis". Gastroenterology Clinics of North America. 44 (1): 39–57. doi:10.1016/j.gtc.2014.11.005. ISSN0889-8553.
↑Saad RJ (2016). "The Wireless Motility Capsule: a One-Stop Shop for the Evaluation of GI Motility Disorders". Curr Gastroenterol Rep. 18 (3): 14. doi:10.1007/s11894-016-0489-x. PMID26908282.