Food transit duration is associated with the number of stage II transport cycles when eating solid food.

Abstract:

OBJECTIVE:When eating solids, stage II transport (St2Tr) propels triturated food into the pharynx for bolus formation and storage before swallowing. Although the existence of St2Tr is acknowledged, the reason for its existence remains unclear. Understanding it may facilitate development of food appropriate for individuals with dysphagia. The purpose of this study was to explore how measures of duration of eating and swallowing affect the number of St2Tr cycles. DESIGN:Videofluorography was performed on 13 healthy subjects eating 6-g squares of banana, tofu, and cookies. Measurements included the number of St2Tr cycles, duration of processing (from food entering the mouth to onset of swallowing), pre-upper esophageal sphincter (UES) transit duration (from onset of swallowing to onset of UES transit), UES transit duration (leading edge to trailing edge passing the UES), and total sequence duration (from onset of swallowing to terminal swallow). Principal component (PC) analysis was used to identify factors affecting the number of St2Tr cycles. Analysis of covariance was performed using the 1st PC as an independent variable for predicting the number of St2Tr cycles. RESULTS:All four duration measures were significantly positively correlated with the number of St2Tr cycles. Analysis revealed two orthogonal PCs with variable loading. The 1st PC was a function of the timing variables. The 2nd PC was a function of the number of swallows. CONCLUSIONS:The number of St2Tr cycles was associated with measures of food transit duration and was greater with harder foods before processing and more viscous foods just before swallowing.

journal_name

Arch Oral Biol

journal_title

Archives of oral biology

authors

Hiraoka T,Palmer JB,Brodsky MB,Yoda M,Inokuchi H,Tsubahara A

doi

10.1016/j.archoralbio.2017.05.013

subject

Has Abstract

pub_date

2017-09-01 00:00:00

pages

186-191

eissn

0003-9969

issn

1879-1506

pii

S0003-9969(17)30158-9

journal_volume

81

pub_type

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