| タイトル | Facial Soft Tissue Measurement in Microgravity-induces Fluid Shifts |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140003599 |
| 著者（英） | Sargsyan, Ashot; Marshburn, Thomas; Cole, Richard; Garcia, Kathleen; Pavela, James |
| 発行日 | 2014-01-01 |
| 言語 | eng |
| 内容記述 | Fluid shifts are a wellknown phenomenon in microgravity, and one result is facial edema. Objective measurement of tissue thickness in a standardized location could provide a correlate with the severity of the fluid shift. Previous studies of forehead tissue thickness (TTf) suggest that when exposed to environments that cause fluid shifts, including hypergravity, headdown tilt, and highaltitude/lowpressure, TTf changes in a consistent and measurable fashion. However, the technique in past studies is not well described or standardized. The International Space Station (ISS) houses an ultrasound (US) system capable of accurate submillimeter measurements of TTf. We undertook to measure TTf during longduration space flight using a new accurate, repeatable and transferable technique. Methods: Inflight and postflight Bmode ultrasound images of a single astronaut's facial soft tissues were obtained using a Vividq US system with a 12LRS highfrequency linear array probe (General Electric, USA). Strictly midsagittal images were obtained involving the lower frontal bone, the nasofrontal angle, and the osseocartilaginous junction below. Single images were chosen for comparison that contained identical views of the bony landmarks and identical acoustical interface between the probe and skin. Using Gingko CADx DICOM viewing software, soft tissue thickness was measured at a right angle to the most prominent point of the inferior frontal bone to the epidermis. Four independent thickness measurements were made. Conclusions: Forehead tissue thickness measurement by ultrasound in microgravity is feasible, and our data suggest a decrease in tissue thickness upon return from microgravity environment, which is likely related to the cessation of fluid shifts. Further study is warranted to standardize the technique with regard to the individual variability of the local anatomy in this area. |
| NASA分類 | Aerospace Medicine |
| レポートNO | JSC-CN-29971 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
|
