Document Detail


Reversal of lower limb venous and lymphatic pooling by passive non-invasive calf muscle pump stimulation.
MedLine Citation:
PMID:  17946146     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Our preliminary data indicate that exogenous plantar micromechanical stimulation at 45 Hz applied at the plantar surface can prevent tachycardia and blood pressure depression associated with immobility, consistent with improvement in venous and lymphatic fluid return delivered by increased calf muscle activity. In this study, instantaneous beat-to-beat systolic blood pressure of thirty four healthy adult women participants (n=34; age range: 35-78 years) were assessed non-invasively using servo-controlled infra-red finger arterial plethysmography, for 30 minutes in the supine position, followed by 30 minutes in the seated position without plantar stimulation, and lastly for 30 minutes in the seated position with the application of a 45 Hz plantar stimulus (50 microm, p-p). Thirty minutes of supine rest resulted in an average increase of 15 mmHg in systolic pressure. During the 30 minutes of upright sitting regimen, two distinct sub-populations were observed. One group (n=18; "hypotensives") experienced a depression of approximately 15 mmHg in systolic pressure, while the other group (n=16; "normotensives and hypertensives") experienced an elevation in the systolic pressure by approximately 8 mmHg. The subsequent 30 minute application of plantar stimulus reversed the pressure drop in hypotensives and elevated the systolic pressure by approximately 20 mmHg in all the subjects. Plantar-based exogenous micromechanical vibration may be an effective approach for reversal of blood pressure depression associated with the physical stress of immobility over a long term, consistent with enhanced venous and lymphatic fluid return delivered via improved calf muscle contractility.
Authors:
Guruprasad Madhavan; Jason P Cole; Carolyn S Pierce; Kenneth J McLeod
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference     Volume:  1     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2006  
Date Detail:
Created Date:  2007-10-23     Completed Date:  2008-03-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2875-7     Citation Subset:  IM    
Affiliation:
Dept. of Bioeng., Thomas J Watson School of Engineering and Applied Science, State Univ. of New York, Binghamton, NY 13902, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Biomedical Engineering
Blood Pressure
Blood Volume / physiology
Electric Stimulation Therapy*
Female
Humans
Leg
Lymph / physiology
Lymphatic System / physiology*
Middle Aged
Muscle, Skeletal / blood supply,  physiology*
Posture / physiology
Supine Position / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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