Method for examining the deep femoral vein and its anastomoses with the femoral vein using multispiral computed tomography with intravenous contrast Russian patent published in 2023 - IPC A61B6/02 A61B5/02 A61B5/103 

FIELD: medicine

SUBSTANCE: conduct multispiral computer phlebography. In this case, the study is carried out in a room where the temperature is 25 °С, at the height of the Valsalva test. The patient is given a position with a raised head end and lower limbs by 30°. The contrast agent is injected into the cubital vein at the rate of 1.5 ml/kg at a rate of 3 ml per second using an injector. The scan delay time is 2 minutes. Then the image is reconstructed. At the same time, the modes of multi-plane section and the maximum intensity projection mode are combined. For the latter, the layer thickness is set within 15-25 mm. The width and center parameters of the render window are set to 100 and 200 Hounsfield units, respectively. The inclination of the section planes is determined so that the axial Z axis of the image coincides with the axis of the femoral vein from its mouth to the popliteal region, keeping the axial axis fixed, but changing the direction of the section planes along the X or Y axes. Examine the femoral vein and its anastomoses with the deep femoral vein. Next, the center of intersection of all three axes is set at the level of the middle of the thigh, while aligning the axial axis Z with the axis of the deep vein of the thigh throughout the latter from the mouth to the middle of the thigh. The layer thickness for the maximum intensity projection mode is set within 10-20 mm, and the parameters of the center and width of the visualization window are set to 100 and 200 Hounsfield units, respectively. Without changing the position of the Z axis, the deep femoral vein and its tributaries are examined by moving the X or Y section planes.

EFFECT: determination of the patency and localization of the deep femoral vein and its anastomoses is provided through the use of multispiral computer phlebography according to the claimed method.

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