Incidence Rate And Preliminary Study Of Deep Vein Thrombosis After Joint Replacement

Objective To investigate the incident rate(IR), partly related influence factors ofdeep vein thrombosis(DVT)after total hip replacement(THR) and total kneereplacement (TKR).Methods From May 2007 to August 2009, patients with uncemented THR orcemented TKR were underwent digitizing deep vein anterograde venography of theoperated lower limb 3-6 days after joint operation, in order to find the location andsize of thrombus.Related document, symptom and sign were recorded.There were240 uncemented THR patients,including 85 males and 155 females), age were 22-86(63.4+ 14.27). There were 105 cemented TKR patients,including 20 males and 85females, age were 29-87 (67.12+ 8.09).The patients were divided into DVT groupand Non–DVT group according to whether the DVT had formed . For uncementedTHR The incident rate of disease kind and the operation time and the levels oflipidmetabolism of these two groups were statistically compared. For cement TKRthe temperatures at the knee of these two groups in the operation were statisticallycompared.Results The number of DVT after uncemented THR and cemented TKR were 65and 46.There were 15 THR patients and 30 TKR patients who had clinical evidences.For uncemented THR The time of operation and level of cholesterin weresignificantly longer and higher in DVT group. Hip fracture patients had the highestincident rate of DVT . bur there is no significant difference (p＞0.05).For cementTKR The initial temperatures of the popliteal fossa were 29.4±0.7℃,the maximumtemperature were 32.5±1.0℃,always lower than the body temperature.No significantdifference was found of the temperatures in the popliteal fossa between the DVTgroup and the Non-DVT group (p＞0.05).Conclusio The incident rate of DVT after uncemented THR and cemented TKRwere 27.08%(65/240)and 43.81%(46/105),The incident rate of clinical evidenceswere23.1% (15／65)和65.2% (30／46)。There is relationship between cholesterol,operation time and DVT. Polymerization of the cement is not be a cause of directdamage to the veins surrounding the knee and it has no direct relationship with DVT.