Abstract:

Objective To study the effect of air pressure wave therapy on lower extremity deep venous thrombosis in high⁃risk pregnant women. Methods A total of 400 high⁃risk pregnant women who delivered in the Department of Obstetrics of the Second People′ s Hospital of Panyu District from October 2019 to October 2020 were selected as the research objects. They were randomly divided into two groups with 200 cases in each group. The control group was given routine measures to prevent postpartum venous thrombosis，and the observation group was given air wave pressure therapeutic instrument intervention on the basis of the control group. The indexes of coagulation function and venous blood flow velocity were analyzed. All parturients were followed up for 1 month to observe the formation of lower extremity venous thrombosis. Results In the control group，the thigh circumference on the 3rd day after delivery was significantly smaller than that on the 1st day after delivery，the thigh circumfer⁃ ence and calf circumference on the 7th day after delivery were significantly smaller than that on the 1st and 3rd days before delivery（P < 0.05）. On the 3rd and 7th day after delivery，the thigh circumference and calf circumfer⁃ ence of the observation group were significantly smaller than those of the prenatal group，the 1st day after delivery and the control group（P < 0.05）. The levels of D⁃D，FIB，blood viscosity，platelet aggregation rate，hematocrit and plasma viscosity in the control group on the 7th day after delivery were significantly lower than those before delivery（P < 0.05）. The levels of Pt，APTT，TT，PLT，D⁃D，FIB，blood viscosity，platelet aggregation rate，he⁃ matocrit and plasma viscosity in the observation group on the 7th day after delivery were significantly lower than those before delivery and the 7th day after delivery in the control group（P < 0.05）. The blood flow velocity of exter⁃ nal iliac vein，common femoral vein，deep femoral vein and popliteal vein in the observation group on the 7th day （P < 0.05）. The two groups were followed up for one month after delivery，3 cases（1.50%）of the control group had lower extremity venous thrombosis. No lower extremity vein thrombosis was found in the observation group. There was no significant difference between the two groups（χ2 = 3.023，P = 0.082）. Conclusion Air pressure wave therapy is of value clinically for preventing deep venous thrombosis of lower limbs in high⁃risk pregnant women. 

Key words:

air pressure wave, high risk pregnant women, lower extremity deep vein, thrombosis, prothrombin time, blood viscosity, popliteal vein, blood flow velocity