Ankle exercise and venous blood velocity

2009 ◽  
Vol 101 (06) ◽  
pp. 1100-1103 ◽  
Author(s):  
Abdo Yaekoub ◽  
Syed Ahsan ◽  
Fadi Matta ◽  
Monisha Lala ◽  
Bakhtiar Mirza ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Venous Thrombosis ◽  
Peak Velocity ◽  
Venous Blood ◽  
Blood Velocity ◽  
Popliteal Vein ◽  
Venous Stasis ◽  
Pulsed Doppler ◽  
Healthy Male ◽  
Pulsed Doppler Ultrasound

SummaryAnkle exercise increases venous blood velocity while supine, but the effect of ankle exercise on venous blood velocity while sitting is not known. In this investigation, we test the hypothesis that venous blood velocity can be increased while sitting by repetitive dorsiflexion of the foot. Time-averaged peak velocity (TAPV) in the popliteal vein of 20 healthy male volunteers was measured by pulsed Doppler ultrasound at rest and during ankle exercise in the supine and sitting positions. Right popliteal vein TAPV while supine at rest was 11 cm/second (sec) (95% confidence interval [CI] =9–13 cm/sec) and with ankle exercise it increased to 24 cm/sec (95% CI =20–28 cm/sec) (p<0.0001). With sitting at rest, right popliteal vein blood TAPV decreased from 11 cm/sec to 3 cm/sec (95% CI = 2–4 cm/sec) (p<0.0001). With ankle exercise while sitting, right popliteal vein TAPV increased to 18 cm/sec (95% CI =15–21 cm/sec) (p<0.0001). In conclusion, in both the supine and sitting positions, ankle exercise increased venous blood velocity, thereby transiently reducing a tendency toward venous stasis. Such ankle exercise might be useful in the prevention of stasis-induced deep venous thrombosis.

Effect of compression stockings on venous blood velocity and blood flow

2010 ◽  
Vol 103 (01) ◽  
pp. 138-144 ◽  
Author(s):  
Fadi Matta ◽  
Abdo Yaekoub ◽  
Syed Ahsan ◽  
Aaref Badshah ◽  
Fahad Younas ◽  
...  
Keyword(s):  
Blood Flow ◽  
Peak Velocity ◽  
Venous Blood ◽  
Blood Velocity ◽  
Popliteal Vein ◽  
Compression Stockings ◽  
Mean Velocity ◽  
Pulsed Wave Doppler ◽  
Vein Diameter ◽  
Time Average

SummaryThe effects of graduated compression stockings (GCS) on venous blood velocity have not been established. In healthy subjects, most investigations showed no effect on blood velocity, but mixed results have been reported. In this investigation we to test the hypothesis that popliteal blood velocity is increased by properly fitted GCS. Time average peak velocity in the popliteal vein, as well as time average mean velocity, vein diameter and mean volumetric flow were measured by pulsed wave Doppler ultrasound in 25 healthy male volunteers without compression stockings and repeated with fitted thigh-length compression stockings. Measurements were obtained while supine and while sitting at rest and during ankle exercise. Thigh-length GCS did not increase popliteal vein blood velocity, diameter, or volumetric blood flow while supine or sitting, with or without ankle exercise.

Effects of graduated compression stockings, local vibration and their combination on popliteal venous blood velocity

2020 ◽  
Vol 35 (7) ◽  
pp. 505-512
Author(s):  
Loïc Espeit ◽  
Thomas Lapole
Keyword(s):  
Pilot Study ◽  
Prone Position ◽  
Doppler Ultrasound ◽  
Healthy Subjects ◽  
Peak Velocity ◽  
Venous Blood ◽  
Blood Velocity ◽  
Compression Stockings ◽  
Local Vibration ◽  
Graduated Compression Stockings

Objectives The purpose of this pilot study was to examine and compare the effects of graduated compression stockings, local vibration, and combined graduated compression stockings and local vibration on popliteal venous blood velocity. Method Twenty-four healthy subjects received four 15 min interventions (control, graduated compression stockings alone, local vibration alone, and combined graduated compression stockings and local vibration), while resting inactive in the prone position. Popliteal vein blood velocity was investigated before (PRE) and at the end (POST) of each intervention using Doppler ultrasound. Results At POST, peak velocity was reported to be 26.3 ± 53.5% ( p <  0.05) greater for local vibration than control (CONT). Peak velocity was 46.2 ± 54.6% ( p <  0.001) and 21.1 ± 37.6% ( p <  0.01) higher for graduated compression stockings than CONT and local vibration, respectively. Graduated compression stockings + local vibration presented 64.1 ± 58.0% ( p <  0.001), 38.4 ± 52.4% ( p <  0.001) and 15.0 ± 31.6% ( p <  0.05) greater values than CONT, local vibration and graduated compression stockings, respectively. Conclusions This study demonstrated an increase in popliteal venous blood velocity after graduated compression stockings and local vibration application. Their combination provided the greatest effects.

Calf exercise in the seated position using a new dynamic biped device increases femoral vein peak velocity up to eight-fold

2003 ◽  
Vol 18 (2) ◽  
pp. 70-72 ◽  
Author(s):  
M F Caruana ◽  
R E Brightwell ◽  
E L Huguet ◽  
P Whitear ◽  
D W Hodgkinson ◽  
...  
Keyword(s):  
Blood Flow ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Flow Velocity ◽  
Peak Flow ◽  
Femoral Vein ◽  
Venous Blood ◽  
Calf Muscle ◽  
Venous Stasis ◽  
Venous Blood Flow

Background and objective: Lower limb deep venous thrombosis is a common condition with a recognized morbidity and mortality. Hitherto known as a complication in hospitalized patients, anecdotal media reports and scientific trials have raised the profile of the same condition in association with air travel. Although probably multifactorial in aetiology, venous stasis is considered an important and correctable risk factor in the pathogenesis of deep venous thrombosis. The aim of this study was to assess the effectiveness of exercising the calf muscle blood pump in increasing venous blood flow using a new dynamic alternating inflatable biped device (Lymgym™, Lymgym Ltd, UK) which has been designed to be used by air passengers. Methods: Doppler ultrasound was used to assess peak flow velocity in the superficial femoral vein in 30 lower limbs of 15 healthy volunteers with no history of venous disease. Measurements of peak flow velocity were taken at rest in the seated 'coach position' and during calf muscle pump exercises with the device. Results: Peak blood flow velocity was eight-fold higher ( P < 0.0001, Wilcoxon signed rank test) during exercise with the device than at rest. Conclusions: These results show that use of the dynamic alternating biped device (Lymgym™) effectively reduces venous stasis when used in the seated position as defined by measurements of peak venous blood flow. These results provide the scientific justification for further studies assessing the value of this device in reducing the risk of travel-related thrombosis.

scholarly journals Diagnostic Ultrasound Safety

2014 ◽  
Vol 8 (2) ◽  
pp. 178-183 ◽  
Author(s):  
Kazuo Maeda
Keyword(s):  
Obstet Gynecol ◽  
Physical Property ◽  
Diagnostic Ultrasound ◽  
Mechanical Effect ◽  
Mechanical Index ◽  
Pulsed Doppler ◽  
Output Intensity ◽  
Thermal Index ◽  
4D Ultrasound ◽  
Pulsed Doppler Ultrasound

ABSTRACT Ultrasound bioeffect is discussed from its physical property, i.e. thermal effect by thermal index, mechanical effect by mechanical index, and by the output intensity of ultrasound. Generally, thermal and mechanical indices should be lower than 1 in obstetrical setting, and threshold output intensity of no bioeffect is lower than SPTA 240 mW/cm2 in pulse wave. Pulsed Doppler ultrasound thermal and mechanical indices should be also lower than 1, and should be carefully used it in 11 to 13+6 weeks of pregnancy. Real-time B-mode, transvaginal scan, pulsed Doppler, 3D and 4D ultrasound were separately discussed in the ultrasound safety. Generally diagnostic ultrasound is safe for the fetus and embryo, if thermal and mechanical indices are lower than 1, and ultrasound devices are safe, if it is used under official limitation, e.g. the output intensity is less than SPTA 10 mW/cm2 in Japan. The ultrasound user is responsible ultrasound safety, e.g. higher thermal and mechanical indices than 1 should be lowered to be lower than 1, controlling the device output intensity. The user should learn bioeffects of ultrasound and prudent use of ultrasound under the ALARA principle. How to cite this article Maeda K, Kurjak A. Diagnostic Ultrasound Safety. Donald School J Ultrasound Obstet Gynecol 2014;8(2):178-183.

Sign in / Sign up

Export Citation Format

Share Document