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

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.

scholarly journals Out-patient detection of deep vein thrombosis using a combination of risk scoring and strain-gauge-plethysmography: a follow-up study

2009 ◽  
Vol 8 (3) ◽  
pp. 127-130
Author(s):  
Nigel J Langford ◽  
◽  
Karl Tonks ◽  
Manjit Singh ◽  
◽  
...  
Keyword(s):  
Deep Vein Thrombosis ◽  
Strain Gauge ◽  
Initial Assessment ◽  
Vein Thrombosis ◽  
Strain Gauge Plethysmography ◽  
Clinical Risk ◽  
Acute Medical Unit ◽  
Risk Scoring ◽  
Deep Vein

Patients are frequently referred to hospital for exclusion of deep vein thrombosis (DVT); however, the diagnosis is only confirmed in 12% of those undergoing investigation. An effective strategy is required, which minimises the number of negative investigations, while safely excluding or confirming the diagnosis. This study investigates the combination of clinical risk scoring and strain-gauge plethysmography in the initial assessment of patients with suspected DVT. A survey was conducted of 1300 patients referred with suspected DVT over the course of a year. The results of this investigation were comparable to previous clinical trials and supports the use of strain-gauge plethysmography combined with clinical risk score in a busy acute medical unit.

Objective Evaluation of Compression Therapy for Deep Vein Thrombosis by Ambulatory Strain-Gauge Plethysmography

1994 ◽  
Vol 9 (1) ◽  
pp. 28-31 ◽  
Author(s):  
S. Ohgi ◽  
Y. Kanaoka ◽  
T. Mori
Keyword(s):  
Deep Vein Thrombosis ◽  
Strain Gauge ◽  
Lower Extremities ◽  
Compression Therapy ◽  
Objective Evaluation ◽  
Vein Thrombosis ◽  
Strain Gauge Plethysmography ◽  
Strong Compression ◽  
Elastic Stockings ◽  
Deep Vein

Objective: To evaluate objectively the effect of compression therapy in patients with different degrees of calf muscle pump impairment following deep vein thrombosis. Design: Prospective study. Setting: Second Department of Surgery, Tottori University School of Medicine, Yonago, Japan. Patients: Twenty-one lower extremities in 16 patients and 23 lower extremities in 13 healthy control subjects. Intervention: Application of standard compression elastic stockings (30–40 mmHg compression at the ankle) and high compression elastic stockings (40–50 mmHg at the ankle) (Sigvaris, Sweden). Main outcome measures: Comparison of expelled volume measured by ambulatory strain-gauge plethysmography. Results: Calf pump function after deep vein thrombosis was classified into three grades (normal, compensated and failed) by the expelled volume. The expelled volume increased from 0.4 ml/dl (SD 0.2) to 0.9 ml/dl (SD 0.5) following the application of strong compression. Conclusion: Compression therapy is haemodynamically effective only when using strong compression (40–50 mmHg) in patients with post-thrombotic syndrome.

Evaluation of Acute Deep Venous Thrombosis of the Lower Limb, Using an Automated Venous Occlusion Plethysmograph

1991 ◽  
Vol 6 (4) ◽  
pp. 241-248 ◽  
Author(s):  
Håkan Ahlström ◽  
Stefan Nilsson ◽  
Göran Hellers
Keyword(s):  
Deep Vein Thrombosis ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Strain Gauge ◽  
Lower Limb ◽  
False Negative ◽  
Venous Occlusion ◽  
Vein Thrombosis ◽  
Deep Vein

One-hundred-and-eleven consecutive patients who were referred for routine phlebography because of clinically suspected deep vein thrombosis (DVT) were also investigated with a new, simplified, computerized strain-gauge plethysmograph (Phlebotest, Eureka AB). An occlusion plethysmograph curve was obtained from each leg simultaneously. Four different numerical parameters were defined and determined from this curve. These parameters were correlated with the phlebographic diagnosis. Three of the parameters of the plethysmograph curve correlated well with the phlebographic diagnosis, which proved correct in 54 patients without DVT, including two false negative cases, and in 12 patients with thrombosis. In 45 patients, plethysmography alone was not sufficient to establish a diagnosis. The plethysmograph described is easy to handle and is suggested for use in selecting those patients, with or without thrombosis, who do not require supplementary phlebography.

A Practical Screener for Deep Vein Thrombosis after Total Hip Replacement

1996 ◽  
Vol 6 (4) ◽  
pp. 140-148 ◽  
Author(s):  
M.A. McNally ◽  
M.D. Crone ◽  
R.A.B. Mollan
Keyword(s):  
Deep Vein Thrombosis ◽  
Total Hip Replacement ◽  
Strain Gauge ◽  
Hip Replacement ◽  
Venous Occlusion ◽  
Initial Assessment ◽  
Consecutive Series ◽  
Total Hip ◽  
Vein Thrombosis ◽  
Deep Vein

A new non-invasive screener for the detection of proximal deep vein thrombosis was evaluated in two consecutive series of patients undergoing primary total hip replacement. The system, which utilises computerised strain gauge venous occlusion plethysmography, was simple to use and allowed serial screening of large numbers of patients without complication. Comparison with venography in 112 patients gave a specificity of 96% (106/110) and a sensitivity of 100% (2/2) for clinically important proximal DVT. Based on this study, a larger management study was performed. After total hip replacement, 516 patients were serially screened and all were followed to at least four months (mean 7.6 months) from surgery. Venography was only requested after a positive screening test. The screener correctly identified proximal and major calf thrombi in this group allowing early treatment. There were no fatal pulmonary emboli. This initial assessment suggests that computerised strain gauge plethysmography may be useful in identifying those patients with silent venous thrombosis after total replacement.

Plethysmographic Measurement of Venous Flow Resistance and Venous Capacity in Humans with Primary Lymphoedema

1990 ◽  
Vol 5 (1) ◽  
pp. 37-40 ◽  
Author(s):  
B. J. F. Klein Rouweler ◽  
J. P. Kuiper ◽  
A. J. M. Brakkee
Keyword(s):  
Deep Vein Thrombosis ◽  
Strain Gauge ◽  
Flow Resistance ◽  
Clinical Severity ◽  
Venous Flow ◽  
Vein Thrombosis ◽  
Venous Capacity ◽  
Deep Vein ◽  
Diagnostic Criterion ◽  
Normal Potential

Venous flow resistance ( Rv) and venous capacity ( C10) was measured by strain-gauge plethysmography in patients with primary lympoedema of the legs. In the calf, Rv was significantly higher than normal and increased with the clinical severity of the oedema, while C10 was significantly lower than normal. Potential causes are discussed. No indications were found that the specificity of Rv, when used as a diagnostic criterion for recent deep vein thrombosis, is influenced by primary lymphoedema.

Sign in / Sign up

Export Citation Format

Share Document