Paixao, Fabiano C. [UNESP]Cora, Luciana A.Americo, Madileine F.de Oliveira, Ricardo BrandtBaffa, OswaldoMiranda, Jose Ricardo A. [UNESP]2014-05-202014-05-202012-10-01IEEE Transactions on Biomedical Engineering. Piscataway: IEEE-Inst Electrical Electronics Engineers Inc, v. 59, n. 10, p. 2737-2743, 2012.0018-9294http://hdl.handle.net/11449/17690The association between anisotropic magnetoresistive (AMR) sensor and AC biosusceptometry (ACB) to evaluate gastrointestinal motility is presented. The AMR-ACB system was successfully characterized in a bench-top study, and in vivo results were compared with those obtained by means of simultaneous manometry. Both AMR-ACB and manometry techniques presented high temporal cross correlation between the two periodicals signals (R = 0.9 +/- 0.1; P < 0.05). The contraction frequencies using AMR-ACB were 73.9 +/- 7.6 mHz and using manometry were 73.8 +/- 7.9 mHz during the baseline (r = 98, p < 0.05). The amplitude of contraction using AMR-ACB was 396 +/- 108 mu T.s and using manometry were 540 +/- 198 mmHg.s during the baseline. The amplitudes of signals for AMR-ACB and manometric recordings were similarly increased to 86.4% and 89.3% by neostigmine, and also decreased to 27.2% and 21.4% by hyoscine butylbromide in all animals, respectively. The AMR-ACB array is nonexpensive, portable, and has high-spatiotemporal resolution to provide helpful information about gastrointestinal tract.2737-2743engBiomagneticsbiomedical equipmentbiosusceptometrygastroenterologymagnetoresistive deviceArtigo10.1109/TBME.2012.2208748WOS:000308989000006Acesso restrito