The purpose of this study was to compare core temperature measurements obtained from the $\rm CorTemp\sp{tm}$ ingestible capsule with those obtained simultaneously from rectal and esophageal probes in order to determine whether the capsule could be considered a suitable replacement for either of the other two methods. Comparisons were made in 20 subjects during rest, exercise (60 min of cycling at 50% HRR), and recovery on two occasions, spaced 16 hours apart. / Bland-Altman plots indicated that levels of agreement between capsules and esophageal and rectal probes exceeded the pre-determined level of acceptability $({\pm}0.5\sp\circ\rm C)$ at both +1 hr and +16 hrs for all three test conditions (rest, exercise, and recovery). During exercise, limits of agreement for the capsule v esophageal comparison extended from ${-}0.73\sp\circ$ to ${+}0.71\sp\circ\rm C$ at +1 hr, and from ${-}0.86\sp\circ$ to ${+}1.14\sp\circ\rm C$ at +16 hrs. For the capsule v rectal comparisons, limits extended from ${-}0.36\sp\circ$ to ${+}0.72\sp\circ\rm C$ at +1 hr and from ${-}0.41\sp\circ$ to ${+}0.91\sp\circ\rm C$ at +16 hrs. / The lack of acceptable agreement was due to the combination of bias, or mean differences between the methods, and to excessive variability among the differences between the methods. Of these two factors, the excessive variability contributed more to the lack of agreement than did the mean differences between methods. Causes for the excessive variability appear to be related to a lack of repeatability among each of the devices individually, to different rates of change in core temperature at the different sites, and to the mobility of the capsules within the gastrointestinal tract. / Within the scope and limitations of this study, it was concluded that the $\rm CorTemp\sp{tm}$ ingestible capsule remains unproven as a suitable replacement for rectal or esophageal probes for the measurement of core temperature. Although the capsules can accurately reflect temperatures in the controlled environment of a waterbath, once situated within the human gastrointestinal tract an unacceptable level of agreement with rectal and esophageal probes was observed. / Source: Dissertation Abstracts International, Volume: 55-09, Section: B, page: 3756. / Major Professor: Robert J. Moffatt. / Thesis (Ph.D.)--The Florida State University, 1994.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_77275 |
| Contributors | Owens, Scott G., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 224 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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