The Value Of Ultrasound Elasticity Imaging Evaluation Of Deep Vein Thrombosis

Purpose： To study ultrasound elastography different time of enousthromboembolism diagnostic value.Material and method：Material: Japanese HITACHI7500color ultrasonicapparatus, probe linear array, probe frequency choose13MHZ. Instrument defaultperipheral vascular conditions; Japanese Toshiba APLIO-80color ultrasonicapparatus, probe linear array, probe frequency5-11MHZ, ultrasonic imagingsoftware; SIEMENS production ARCADIS varic digital subtraction angiography (DSA)method is to take their own control, random selection of side qia the of femoralvein, and the opposite as control group. After the success of the anesthesiawill dog supine fixed in operation table (figure2), choose a side of femoralvein, making skin, disinfection, spread sterile towels, made with balloonblocking blood clots model, which is the improvement Seldinger method of femoralvein distal placement puncture6F catheter sheath, and at the same time theright neck vein area for skin, with law puncture right external jugular veininto6F catheter sheath. The jugular enous sheath into5F balloon catheterin DSA perspective in the catheter guidance will balloon under the test sideqia total vein nearly the inferior vena cava through the opening, the balloonfilled with block iliac total intravenous; At the same time the femoral venoussheath into another5F balloon catheter will balloon in the heart of femoralvein far, balloon filled with the block of femoral vein, and the catheter into5ml with saline water dilute of thrombin100units; Two balloon spacing of4to6cm, is thrombosis section, four hours after a balloon catheter exit endsflat, pulled up, and close the wound after the step by step. Will the preparationgood canine thrombosis model form time divided into four groups: as a day, threedays, seven days, fourteen days thrombosis group, each group of six, respectivelyfor regular two-dimensional ultrasound and color ultrasonic, elastic ultrasonicimaging, DSA check, observation of femoral vein lumen, lining, thrombosis, the echo of color doppler flow condition. Elastic score and histological examinationof blood clots.Results：The echo of the thrombus with the extension of time increases, theflexibility of the thrombus over time with the extension of reduced,1day forgreen-red thrombus shows statified phenomenon, of grade1. Three days that greenand red blood clots, with a green primarily, belong to level2.7days the showfor blood clots green and blue, belong to3grade.14days for light blue anddark blue blood clots that alternate with, of4class.Conclusion：Ultrasoundelastographycaneffectivelyreflectdifferentperiodof the thrombus elastic hardness, and may, according to the elasticity of thethrombus hardness to judge of the thrombus preliminary period.