The Natural Sit-to-Stand-Walk of the Frail

Details

• Personal Author:
  Merryweather A ; Morse J ; Taylor D ; Wong B
• Description:
  Sit-to-stand-walk (STW) is a complex task that sequentially transitions an individual from sitting through standing to walking. In this study we evaluate the unrestricted, natural pattern of movement of the STW task from a hospital bed of 21 (5 Female, 16 Male) frail (MFS > 55) adults (68.0 +/- 11.2 years) with a total of 144 unique trials. Bed height (low, medium, high) and bed rail condition (no rails, Hill-Rom®, Stryker®), were varied, generating 9 potential trial types per participant. A new STW phase, Stand Preparation, is defined specifically for the frail that occurs just prior to the Flexion Momentum Phase, also named here as the Stand Initiation Phase. In conjunction with the newly defined Stand Preparation Phase, movements used by the frail to maintain or regain balance during STW task are newly defined as corrective behaviors (CBs). These include hand, foot, leg and torso CBs. In 144 unique STW trials, 678 hand and foot CBs were observed and recorded. The most frequent CB type was the hand CB (335), followed by the foot CB (316). A coding system for use in the kinematic analysis of the natural STW task was developed that identifies CBs through visual observation. In addition, a 3D biomechanical model was generated from collected marker position data and will be used in future biomechanical analyses with the visually observed CB data. The Stand Initiation Phase contained the most CBs. Significant factors included bed height and phase, as well as their interaction (all with p-values ≤ 0.006). This is the first study to establish a more accurate and complete STW of the frail elderly, as well as to define CBs employed during their natural STW. The dataset from this coding system, along with the newly established STW phases of the frail, are currently being used for further analyses to determine the exact timing and position of fall initiations during STW of the frail. [Description provided by NIOSH]
• Subjects:
  Accidental Falls Accidents Age Factors Biomechanical Phenomena Occupational Health Safety
• Keywords:
  Age Factors Author Keywords: Sit-to-walk Biomechanical Modeling Biomechanics Fall Falls Frail Motion Studies Sit-to-stand Sit-to-stand-walk
• ISBN:
  9780791859407
• Publisher:
  The American Society of Mechanical Engineers
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  New York ; OSHA Region 2 ; OSHA Region 8 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  3
• NIOSHTIC Number:
  nn:20064685
• Citation:
  Proceedings of the ASME 2019 International Mechanical Engineering Congress and Exposition (IMECE-2019), November 11-14, 2019, Salt Lake City, Utah. Volume 3: Biomedical and Biotechnology Engineering. New York: The American Society of Mechanical Engineers, paper no. IMECE2019-11889, V003T04A079, 2019 Nov; 3:IMECE2019-11889
• Contact Point Address:
  Dorothy Taylor, University of Utah, Salt Lake City, UT
• Federal Fiscal Year:
  2020
• Performing Organization:
  University of Utah
• Peer Reviewed:
  False
• Start Date:
  20050701
• Source Full Name:
  Proceedings of the ASME 2019 International Mechanical Engineering Congress and Exposition (IMECE-2019), November 11-14, 2019, Salt Lake City, Utah. Volume 3: Biomedical and Biotechnology Engineering
• End Date:
  20280630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b5fc2e302a2c19912da5a378a10769918090d39b0f393581c01bb4ba1128d797d6bc4a801c9a377f2dadd4fe18adb109f6d171d63383097a6de2f443cd9ea143
• Download URL:
  https://stacks.cdc.gov/view/cdc/223095/cdc_223095_DS1.pdf
• File Type:
  [PDF - 1.15 MB ]