Application of intermittent negative pressure on the lower extremity and its effect on macro‐ and microcirculation in the foot of healthy volunteers

Intermittent negative pressure (INP) applied to the lower leg and foot may increase peripheral circulation. However, it is not clear how different patterns of INP affect macro‐ and microcirculation in the foot. The aim of this study was therefore to determine the effect of different patterns of nega...

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Veröffentlicht in:Physiological reports 2016-09, Vol.4 (17), p.e12911-n/a
Hauptverfasser: Sundby, Øyvind H., Høiseth, Lars Øivind, Mathiesen, Iacob, Jørgensen, Jørgen J., Weedon‐Fekjær, Harald, Hisdal, Jonny
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container_title Physiological reports
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creator Sundby, Øyvind H.
Høiseth, Lars Øivind
Mathiesen, Iacob
Jørgensen, Jørgen J.
Weedon‐Fekjær, Harald
Hisdal, Jonny
description Intermittent negative pressure (INP) applied to the lower leg and foot may increase peripheral circulation. However, it is not clear how different patterns of INP affect macro‐ and microcirculation in the foot. The aim of this study was therefore to determine the effect of different patterns of negative pressure on foot perfusion in healthy volunteers. We hypothesized that short periods with INP would elicit an increase in foot perfusion compared to no negative pressure. In 23 healthy volunteers, we continuously recorded blood flow velocity in a distal foot artery, skin blood flow, heart rate, and blood pressure during application of different patterns of negative pressure (−40 mmHg) to the lower leg. Each participant had their right leg inside an airtight chamber connected to an INP generator. After a baseline period at atmospheric pressure, we applied four different 120 sec sequences with either constant negative pressure or different INP patterns, in a randomized order. The results showed corresponding fluctuations in blood flow velocity and skin blood flow throughout the INP sequences. Blood flow velocity reached a maximum at 4 sec after the onset of negative pressure (average 44% increase above baseline, P 
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However, it is not clear how different patterns of INP affect macro‐ and microcirculation in the foot. The aim of this study was therefore to determine the effect of different patterns of negative pressure on foot perfusion in healthy volunteers. We hypothesized that short periods with INP would elicit an increase in foot perfusion compared to no negative pressure. In 23 healthy volunteers, we continuously recorded blood flow velocity in a distal foot artery, skin blood flow, heart rate, and blood pressure during application of different patterns of negative pressure (−40 mmHg) to the lower leg. Each participant had their right leg inside an airtight chamber connected to an INP generator. After a baseline period at atmospheric pressure, we applied four different 120 sec sequences with either constant negative pressure or different INP patterns, in a randomized order. The results showed corresponding fluctuations in blood flow velocity and skin blood flow throughout the INP sequences. Blood flow velocity reached a maximum at 4 sec after the onset of negative pressure (average 44% increase above baseline, P &lt; 0.001). Skin blood flow and skin temperature increased during all INP sequences (P &lt; 0.001). During constant negative pressure, average blood flow velocity, skin blood flow, and skin temperature decreased (P &lt; 0.001). In conclusion, we observed increased foot perfusion in healthy volunteers after the application of INP on the lower limb. 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However, it is not clear how different patterns of INP affect macro‐ and microcirculation in the foot. The aim of this study was therefore to determine the effect of different patterns of negative pressure on foot perfusion in healthy volunteers. We hypothesized that short periods with INP would elicit an increase in foot perfusion compared to no negative pressure. In 23 healthy volunteers, we continuously recorded blood flow velocity in a distal foot artery, skin blood flow, heart rate, and blood pressure during application of different patterns of negative pressure (−40 mmHg) to the lower leg. Each participant had their right leg inside an airtight chamber connected to an INP generator. After a baseline period at atmospheric pressure, we applied four different 120 sec sequences with either constant negative pressure or different INP patterns, in a randomized order. The results showed corresponding fluctuations in blood flow velocity and skin blood flow throughout the INP sequences. 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Blood flow velocity reached a maximum at 4 sec after the onset of negative pressure (average 44% increase above baseline, P &lt; 0.001). Skin blood flow and skin temperature increased during all INP sequences (P &lt; 0.001). During constant negative pressure, average blood flow velocity, skin blood flow, and skin temperature decreased (P &lt; 0.001). In conclusion, we observed increased foot perfusion in healthy volunteers after the application of INP on the lower limb. In conclusion, we observed increased foot perfusion in healthy volunteers after the application of INP to the lower leg and foot.</abstract><cop>United States</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>27630148</pmid><doi>10.14814/phy2.12911</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Alcohol
Arterial blood flow velocity
Blood flow
Blood Flow Velocity - physiology
Blood Pressure
Circulation
Disease
dorsal pedis artery
Feet
Female
Flow velocity
Foot - blood supply
Foot - physiology
Healthy Volunteers
Heart rate
Humans
intermittent negative pressure
laser doppler fluxmetry
Laser-Doppler Flowmetry - instrumentation
Laser-Doppler Flowmetry - methods
Leg
Lower Extremity - blood supply
Lower Extremity - physiology
Male
Microcirculation
Microcirculation - physiology
Negative-Pressure Wound Therapy - methods
Original Research
Perfusion
Peripheral Arterial Disease - therapy
Physiology
Pressure - adverse effects
Skin
Skin - blood supply
skin blood flow
Veins & arteries
title Application of intermittent negative pressure on the lower extremity and its effect on macro‐ and microcirculation in the foot of healthy volunteers
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