METHOD OF NON-INVASIVE ASSESSMENT OF PRESSURE IN PORTAL VEIN SYSTEM Russian patent published in 2024 - IPC A61B6/00 

FIELD: medicine; radiation diagnostics.

SUBSTANCE: invention can be used for non-invasive assessment of pressure in the portal vein system. Magnetic resonance imaging of the spleen is performed. In the T2-weighted image, the spleen is marked in the axial section. Using the “pixel value” program, the volumetric mass of the spleen (VMS, cm³) is calculated. With VMS values from 161 to 299 cm^3, the pressure in the portal vein system is defined as equal to from 250 to 400 mm H₂O, which corresponds to stage I portal hypertension. With VMS values from 300 to 339 cm³, the pressure in the portal vein system is defined as equal to from 401 to 600 mm H₂O, which corresponds to stage II portal hypertension. For VMS values greater than or equal to 400 cm³, the pressure in the portal vein system is defined as greater than or equal to 601 mm H₂O, which corresponds to stage III portal hypertension. With VMS values from 141 to 160 cm³, the pressure in the portal vein system is defined as equal to from 11 to 249 mm H₂O, which corresponds to the risk of developing portal hypertension. With VMS values from 80 to 140 cm³, the pressure in the portal vein system is defined as equal to 5 to 10 mm H₂O, which corresponds to the norm.

EFFECT: method provides non-invasive assessment and monitoring of pressure in the portal vein system by determining VMS.

1 cl, 13 ex