scholarly journals Computerized Venous Strain-gauge Plethysmography is a Reliable Method for Measuring Venous Function

2014 ◽  
Vol 47 (1) ◽  
pp. 81-86 ◽  
Author(s):  
S. Rosfors ◽  
L.M. Persson ◽  
L. Blomgren
Keyword(s):  
Strain Gauge ◽  
Reliable Method ◽  
Strain Gauge Plethysmography ◽  
Venous Function

Diagnosis of Deep Vein Thrombosis by Combination of Doppler Ultrasound Flow Examination and Strain Gauge Plethysmography

1982 ◽  
Vol 47 (02) ◽  
pp. 141-144 ◽  
Author(s):  
H Bounameaux ◽  
B Krähenbühl ◽  
S Vukanovic
Keyword(s):  
Deep Vein Thrombosis ◽  
Negative Predictive Value ◽  
Doppler Ultrasound ◽  
Strain Gauge ◽  
Predictive Value ◽  
Lower Limbs ◽  
Vein Thrombosis ◽  
Non Invasive ◽  
Strain Gauge Plethysmography ◽  
Deep Vein

SummaryDoppler ultrasound flow examination, strain gauge plethysmography and contrast venography were performed in 160 lower limbs of 80 in-patients. Deep vein thrombosis (DVT) was suspected in 87 limbs. Using measurement of venous stop-flow pressure, the Doppler method had an overall sensitivity of 83%. By combined use of Doppler and Plethysmography, sensitivity was increased to 96%. Specificity was 62% and 51%, respectively. With a positive and a negative predictive value of 80% and 73%, respectively, the combination of both non-invasive methods cannot reliably replace venography in the diagnosis of DTV, although all (40/40) thromboses proximal to or involving the popliteal segment were detected by either Doppler and Plethysmography or both.After exclusion of 14 patients (18%) suffering from conditions known to alter the results of these non-invasive methods, the positive predictive value of abnormal findings in both Doppler and Plethysmography was increased to 94% for suspected limbs, whilst negative predictive value of both negative Doppler and Plethysmography was 90%, allowing the avoidance of venography in these patients.

The use of automated strain gauge plethysmography in the diagnosis of deep vein thrombosis

2002 ◽  
Vol 75 (896) ◽  
pp. 648-651 ◽  
Author(s):  
N A Maskell ◽  
S Cooke ◽  
D J Meecham Jones ◽  
J G Prior ◽  
R J A Butland
Keyword(s):  
Deep Vein Thrombosis ◽  
Strain Gauge ◽  
Vein Thrombosis ◽  
Strain Gauge Plethysmography ◽  
Deep Vein

Non-Invasive Measurement of Venous Muscle Pump Function in the Supine Position

1992 ◽  
Vol 7 (4) ◽  
pp. 146-149 ◽  
Author(s):  
H. J. L. van Gerwen ◽  
A. J. M. Brakkee ◽  
J. P. Kuiper
Keyword(s):  
Supine Position ◽  
Strain Gauge ◽  
Venous Pressure ◽  
University Hospital ◽  
Pressure Reduction ◽  
Pump Function ◽  
Muscle Pump ◽  
Non Invasive ◽  
Strain Gauge Plethysmography ◽  
Leg Movements

Objective: A new non-invasive procedure for testing venous muscle pump function in the horizontal position is presented. Design: The test is based on an indirect method we use for measuring ambulatory venous pressure by means of strain-gauge plethysmography. Setting: University Hospital Nijmegen, The Netherlands. Patients: The results of 28 limbs of 20 patients with deep venous insufficiency are compared with 32 limbs of 16 healthy volunteers. Interventions: The same test is performed in all patients and volunteers: in the supine position a raised venous pressure in the limb is induced by venous congestion. The reduction in venous volume after standardized leg movements is measured by strain-gauge plethysmography and, with an additionally obtained pressure-volume relation, this volume reduction is converted into a pressure reduction. Main outcome measure: The reduction by standardized leg movements of an increased venous pressure is a measure for calf muscle pump function. Results: The mean pressure reduction in the patient group was 47% (standard deviation (SD) = 8%), in the healthy group 77% (SD = 6%). Conclusions: The new ‘supine venous pump function test’ is a promising method for measuring the function of the deep veins. Since the whole procedure is performed in the horizontal positon, the method offers several important advantages.

Plethysmographic Measurement of Venous Flow Resistance and Venous Capacity in Human Legs. Part Two: Normal Values Related to Age, Sex and Site of Measurement

1989 ◽  
Vol 4 (4) ◽  
pp. 251-257 ◽  
Author(s):  
B.J.F. Klein Rouweler ◽  
A.J.M. Brakkee ◽  
J.P. Kuiper
Keyword(s):  
Strain Gauge ◽  
Flow Resistance ◽  
Normal Values ◽  
Age Dependency ◽  
Limb Volume ◽  
Venous Flow ◽  
Strain Gauge Plethysmography ◽  
Sex Dependency ◽  
Venous Capacity

This report presents normal values of venous flow resistance ( Rv) and venous capacity (C10) as measured in human limbs by strain-gauge plethysmography. No age dependency was found for either parameter. Rv was lower in males than in females and lower in left legs than in right legs. C10 was higher in males than in females and higher in left than in right legs. The left-right and sex dependency of the parameters cannot be explained by differences in limb volume. Correlations between selected parameters are presented.

Computerized Strain-Gauge Plethysmography — An Alternative Method for the Detection of Lower Limb Deep Venous Thrombosis?

2000 ◽  
Vol 55 (1) ◽  
pp. 36-39 ◽  
Author(s):  
JULIAN ELFORD ◽  
IRVING WELLS ◽  
JIM COWIE ◽  
CAROL HURLOCK ◽  
HILARY SANDERS
Keyword(s):  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Strain Gauge ◽  
Lower Limb ◽  
Strain Gauge Plethysmography ◽  
Alternative Method

Interface Pressure under Elastic Stockings with Compression Pads during Posture Changes and Exercise

1999 ◽  
Vol 14 (2) ◽  
pp. 71-76 ◽  
Author(s):  
M. Hirai
Keyword(s):  
Strain Gauge ◽  
Pressure Measurement ◽  
Varicose Veins ◽  
Pressure Measurements ◽  
Interface Pressure ◽  
Elastic Materials ◽  
Muscle Pump ◽  
Strain Gauge Plethysmography ◽  
Elastic Stockings ◽  
College Of Nursing

Objective: To quantify the influence of posture and exercise on the interface pressure obtained under elastic stockings with compression pads. Design: Interface pressure measurement and plethysmographic evaluation of elastic stockings with and without compression pads. Setting: Department of Surgery, Aichi Prefectural College of Nursing, Nagoya, Japan. Main outcome measures: Pressure measurements in 24 volunteers were obtained beneath elastic stockings, elastic bandages and short-stretch bandages during supine resting, standing, tip-toe exercise and walking, and the effect of elastic stockings on the muscle pump of the leg was evaluated by strain-gauge plethysmography in 40 limbs with varicose veins. Results: Without compression pads, only short-stretch bandages showed a significant increase in pressure during standing and exercise. When pads were used, however, elastic stockings and bandages also showed a significant increase. With pads, significant improvement in the expelled volume during exercise was observed by strain-gauge plethysmography. Conclusions: Interface pressure under elastic materials during posture and exercise is similar to that under short-stretch bandages when compression pads are used, and pads effectively augment the muscle pump.

Plethysmographic Measurement of Venous Flow Resistance and Venous Capacity in the Human Leg. Part One: Method

1989 ◽  
Vol 4 (4) ◽  
pp. 241-250 ◽  
Author(s):  
B.J.F. Klein Rouweler ◽  
A.J.M. Brakkee ◽  
J.P. Kuiper
Keyword(s):  
Knee Joint ◽  
Strain Gauge ◽  
Flow Resistance ◽  
Room Temperature ◽  
Muscle Tension ◽  
Calf Muscle ◽  
Venous Flow ◽  
Strain Gauge Plethysmography ◽  
Venous Capacity ◽  
Methodological Aspects

This report presents a study of the methodological aspects of the measurement of venous flow resistance ( Rv) and venous capacity (C10) in human legs as measured by strain-gauge plethysmography. The measurements are reproduceable within 10%, in subjects who are well-acclimatized to a room temperature of 28–30 °C. In measurements at the calf, extension of the knee joint may increase Rv by hundreds of percents, while high passive calf muscle tension may be associated with a decrease in Rv and an increase in C10. Inadequate acclimatization may increase Rv and decrease C10, notably in measurements at the foot. The determinants for Rv and C10 are discussed.

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