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[Clinical risk factors for deep vein thrombosis after total hip and knee arthroplasty]
Zhen-peng Guan1, Hou-shan Lü, Yan-zhang Chen
1Arthritis Institute, Peking University People's Hospital, Beijing 100044, China. guan_zhenpeng@sina.com
Insights
Female sex, obesity, and cement use increase deep vein thrombosis (DVT) risk after hip and knee replacement. Rheumatoid arthritis diagnosis appears protective against DVT in these patients.
Area of Science:
- Orthopedic Surgery
- Vascular Medicine
- Clinical Risk Factor Analysis
Context:
- Deep vein thrombosis (DVT) is a significant complication following major orthopedic procedures like total hip arthroplasty (THA) and total knee arthroplasty (TKA).
- Prophylactic anticoagulation is standard, yet DVT incidence remains a concern, particularly in specific patient populations.
- Identifying precise clinical risk factors is crucial for refining preventative strategies in Chinese patients undergoing THA/TKA.
Purpose:
- To investigate clinical risk factors associated with DVT development in Chinese patients undergoing THA and TKA.
- To analyze the impact of pre-operative and post-operative clinical factors on DVT incidence despite prophylactic treatment.
- To identify both risk and protective factors for DVT in this specific surgical context.
Summary:
- This study analyzed 128 THA/TKA procedures in 95 Chinese patients receiving low-molecular-weight heparin prophylaxis.
- Color Doppler ultrasonography detected DVT in 47.4% of patients; proximal DVT was 3.2%.
- Logistic regression identified female sex (OR 10.008), obesity (OR 3.094), and cement usage (OR 8.887) as significant risk factors, while diagnosed rheumatoid arthritis (RA) was a protective factor (OR 0.194).
Impact:
- Findings highlight specific demographic and procedural factors (female sex, obesity, cement use) that elevate DVT risk post-THA/TKA.
- The protective role of rheumatoid arthritis warrants further investigation for potential therapeutic insights.
- Results can inform targeted DVT prevention strategies and risk stratification for orthopedic surgery patients in China.
Objective:
To analyze the clinical risk factors for deep vein thrombosis (DVT) after total hip and knee arthroplasty in Chinese patients who received prophylactic treatment for DVT.
Methods:
We evaluated 128 total hip arthroplasty (THA) and total knee arthroplasty (TKA) in 95 patients performed at our center from April 2004 to August 2004, which included 48 THAs in 43 patients and 80 TKAs in 52 patients. There were 27 men and 68 women with a mean age of 59.77 years (range, 23-78 years). All patients had been given low-molecular-weight heparin before operation and for 7-10 days post-operation to prevent DVT. Color Doppler ultrasonography was used to detect DVT of bilateral lower extremities in all patients before operation and at 7-10 days after operation. Nineteen clinical factors were examined preoperation and 7-10 days post-operation in order to analyze their influences on DVT formation after surgery.
Results:
There were 45 patients who developed DVT after operation. The incidence of DVT in all patients was 47.4% (45/95) and the incidence of proximal DVT was 3.2%. There were more asymptomatic DVT (57.8%, 26/45) than symptomatic ones, and some patients without DVT (14%, 7/50) presented some of the DVT symptoms. Logistic regression analysis demonstrated a definite association of female, obesity (representative by BMI), cement usage and diagnosed RA with DVT with odds ratio of 10.008, 3.094, 8.887, and 0.194 respectively. Other clinical factors had no statistically significant association with DVT.
Conclusions:
Female, obesity, and cement usage were the risk factors for DVT after THA and TKA, and diagnosed RA was the protecting factors for DVT after THA and TKA. Other clinical factors such as age, OA, type of implant, monolateral or bilateral operation, duration of anesthesia, surgery and bandage usage for blood control, time for immobilization et al were not the risk factors for DVT.
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