Incidence and distribution of lower extremity deep venous thrombosis at indirect computed tomography venography in patients suspected of pulmonary embolism

2007 ◽  
Vol 97 (04) ◽  
pp. 566-572 ◽  
Author(s):  
Benoît Ghaye ◽  
Charlemagne Noukoua ◽  
Robert Dondelinger ◽  
Alain Nchimi
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Venous Thrombosis ◽  
High Accuracy ◽  
Lower Limbs ◽  
Inguinal Ligament ◽  
Ct Venography ◽  
Below The Knee ◽  
Scanning Range ◽  
Computed Tomography Venography

SummaryIndirect computed tomography (CT) venography reportedly provides high accuracy for detection of venous thrombosis in patients suspected of pulmonary embolism (PE). Nevertheless, the extent of the scanning range for lower limb and abdominal veins remains to be determined. It was the objective of this study to investigate the distribution of venous thrombosis in order to identify the most appropriate extent of scanning range when using CT venography. We reviewed 1,408 combined CT pulmonary angiographies (CTPA) and indirect CT venographies of the lower limbs, performed in patients suspected of PE. Percentage of venous thromboembolism (VTE), which includes PE and/or venous thrombosis was calculated. Location and the upper end of clots were recorded in 37 venous segments per patient from calf to diaphragm. PE, venous thrombosis and VTE, were found respectively in 272 (19.3%), 259 (18.4%) and 329 (23.4%) patients. Addition of CT venography to CTPA increased depiction of VTE in 17.3%.The upper end of venous thrombosis was located below the knee in 48%, between knee and inguinal ligament in 36% of the patients, and above the inguinal ligament in 15%.Ninety-six patients had thrombosis in a single vein, of which none occured above the iliac crests in a patient without PE at CTPA. In conclusion, when added to CTPA, optimal scanning of CT venography should extent from calves to the iliac crests in patients suspected of VTE.

scholarly journals Detection of Deep Vein Thrombosis by Follow-up Indirect Computed Tomography Venography after Pulmonary Embolism

2018 ◽  
Vol 81 (1) ◽  
pp. 49
Author(s):  
Hye Jin Lee ◽  
Seung-Ick Cha ◽  
Kyung-Min Shin ◽  
Jae-Kwang Lim ◽  
Seung-Soo Yoo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Deep Vein Thrombosis ◽  
Vein Thrombosis ◽  
Deep Vein ◽  
Computed Tomography Venography

Venographic Studies on the Role of Valve Pockets in Thrombogenesis with Clinical Comments

1975 ◽  
Author(s):  
L. Diener ◽  
J.L.E. Ericsson ◽  
F. Lund
Keyword(s):  
Pulmonary Embolism ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Contrast Medium ◽  
Lower Limbs ◽  
Fatal Pulmonary Embolism ◽  
Early Type ◽  
Clinical Series ◽  
Good Agreement

In postmortem exploration of the veins of the lower limbs for studies of the frequency and significance of thromboembolism intraosseous venography with injection of contrast medium into the calcaneus was performed followed by complete dissection of the leg veins. A good agreement was found between venographic results and dissection findings. Out of the 596 legs examined, deep venous thrombosis was found in 229 (38%). In 32 of the lower limbs (5.4%) a definite localization and adherence of thrombi to valve pockets was noted. Altogether, 37 such thrombi were encountered. In addition 9 small thrombi of early type were found floating freely in the venous lumen just above a pocket. Microscopically the thrombi showed the greatest degree of organization at the bottom of the valve pocket speaking for this localization as the origin of formation. This is in accordance with the fact that stasis of blood would be most pronounced at the bottom of valve pockets as shown by retention of contrast medium in pockets in clinical venography. In a clinical series of venographies performed after hip surgery several thrombi located to valve pockets were found. Some of these thrombi had proximally free floating tails forming a potential menace of fatal pulmonary embolism.

Computed Tomography in Deep Venous Thrombosis with Limb Oedema

1985 ◽  
Vol 26 (6) ◽  
pp. 727-730 ◽  
Author(s):  
E. Seem ◽  
E. Stranden ◽  
M. G. Stiris
Keyword(s):  
Computed Tomography ◽  
Hydrostatic Pressure ◽  
Soft Tissue ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Interstitial Fluid ◽  
Lower Limbs ◽  
Compartment Syndromes ◽  
Tissue Compliance ◽  
Tissue Compartments

Computed tomography was used in 12 patients to investigate the distribution of oedema in the soft tissue compartments of lower limbs with deep venous thrombosis. Oedema was evenly distributed throughout the subcutis and the muscular compartments in tomograms obtained 25 cm proximal to the ankle. Significantly less swelling in the muscular compartments was found 10 cm proximal to the ankle. Interstitial fluid hydrostatic pressure was measured in the subcutis, and in anterior and posterior muscular compartments, and was significantly increased in all cases. Except for one case, the recorded pressures were well below 30 mmHg, which is considered the limit above which compartment syndromes occur. Tissue compliance was significantly lower in muscular compartments than in the subcutis.

Improved Delineation of Pulmonary Embolism and Venous Thrombosis Through Frequency Selective Nonlinear Blending in Computed Tomography

2017 ◽  
Vol 52 (4) ◽  
pp. 240-244 ◽  
Author(s):  
Malte Niklas Bongers ◽  
Georg Bier ◽  
Christopher Kloth ◽  
Christoph Schabel ◽  
Jan Fritz ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Venous Thrombosis ◽  
Frequency Selective
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