Mercury Strain Gauge Plethysmography

1962 ◽  
Vol 85 (2) ◽  
pp. 215 ◽  
Author(s):  
D. E. STRANDNESS
Keyword(s):  
Strain Gauge ◽  
Strain Gauge Plethysmography ◽  
Mercury Strain Gauge

Mercury Strain-Gauge Plethysmography Venous Mode: Non-Invasive Technique of Choice in Vascular Pathology

1987 ◽  
Vol 2 (1) ◽  
pp. 47-51 ◽  
Author(s):  
J.P. Barroy ◽  
D. Munck ◽  
E. Paturiaux ◽  
M. Goldstein
Keyword(s):  
Strain Gauge ◽  
Venous Insufficiency ◽  
Venous Pressure ◽  
Vascular Pathology ◽  
Hysteresis Curve ◽  
Invasive Technique ◽  
Non Invasive ◽  
Strain Gauge Plethysmography ◽  
Precise Diagnosis ◽  
Mercury Strain Gauge

Mercury strain-gauge plethysmography venous mode is a non-invasive technique for exploration of the haemodynamics of the extremities. The plethysmographic parameters used are: (1) the venous inflow (in ml/100 ml/min); (2) the venous outflow (in ml/100 ml/min); (3) the venous capacity in ml/100ml; (4) the venous distensibility index in ml/100 ml/ mmHg; and (5) the venous pressure measured by ‘hysteresis curve’. This method permits us to analyse the venous haemodynamics of both extremities simultaneously (the normal limb serving as the control), to obtain a precise diagnosis and to appreciate the efficacy of treatment at follow-up. The aetiology of the swollen limb can be precisely identified in 95% of the studied cases: oedema in superficial venous insufficiency, oedema in the deep venous insufficiency, oedema of inflammatory origin, oedema in the arterial insufficiency, oedema of cardiac origin, lymphoedema. During the last 3 years, we have followed up 580 patients with this method.

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
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