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To investigate whether preemptive analgesic of femoral nerve block could prevent deep venous thromboembolism due to inhibiting the excessive release of neutrophil elastase and inflammatory cytokines.
Femoral nerve block is an effective analgesic mode in patients after total knee arthroplasty. In recent studies, there has been shown that a large amount of neutrophil elastase release from neutrophils could induce the development of deep venous thromboembolism and femoral nerve block may reduce the incidence of the development of deep venous thromboembolism. In addition, inflammatory cytokines including interleukin-1(IL-1), IL-6, IL-8 and tumor necrosis factor(TNF) were associated with deep venous thromboembolism. Thus, the investigators hypothesised that preemptive analgesic of femoral nerve block could prevent deep venous thromboembolism due to inhibiting the excessive release of neutrophil elastase and inflammatory cytokines.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| femoral nerve block | Experimental | femoral nerve block will be administered before or after the surgery |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| femoral nerve block | Procedure | use the nerve stimulator,the femoral nerve block will be administered before or after the surgery |
|
| Measure | Description | Time Frame |
|---|---|---|
| Serum concentration of inflammatory cytokine | change from baseline at 30min, 60min, 90min after using tourniquet and 12h, 24h,48h after operation |
| Measure | Description | Time Frame |
|---|---|---|
| Concentration of related inflammatory factors of deep venous thromboembolism | inflammatory factors include IL-1, IL-6, IL-8 and TNF,detecting the concentrations by enzyme-linked immunosorbent assay (ELISA). | change from baseline at 30min, 60min, 90min after using tourniquet and 12h, 24h,48h after operation |
| Measure | Description | Time Frame |
|---|---|---|
| Diagnosis of deep venous thromboembolism by ultrasonography | result of diagnosis is yes or no | 2day and 7day after operation |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Xinli Ni | Contact | +086 951-6743252 | xinlini6@yahoo.com |
| Name | Affiliation | Role |
|---|---|---|
| Xu Wang | Gereral Hospital of Ningxia Medical University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| General Hospital of Ningxia Medical University | Recruiting | Yinchuan | Ningxia | 750004 | China |
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| ID | Term |
|---|---|
| D020370 | Osteoarthritis, Knee |
| ID | Term |
|---|---|
| D010003 | Osteoarthritis |
| D001168 | Arthritis |
| D007592 | Joint Diseases |
| D009140 | Musculoskeletal Diseases |
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| D012216 |
| Rheumatic Diseases |