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  • Title: Thromboembolic prophylaxis with use of aspirin, exercise, and graded elastic stockings or intermittent compression devices in patients managed with total hip arthroplasty.
    Author: Sarmiento A, Goswami AD.
    Journal: J Bone Joint Surg Am; 1999 Mar; 81(3):339-46. PubMed ID: 10199271.
    Abstract:
    BACKGROUND: Prophylaxis against pulmonary embolism as a complication of total hip arthroplasty remains controversial. Our experience suggests that an inexpensive protocol of prophylaxis that includes aspirin and exercise is effective. METHODS: We investigated the effectiveness of aspirin, a program of intraoperative and postoperative exercises, and graded elastic stockings or intermittent compression devices as prophylaxis against thromboembolic disease in a series of 1267 patients who had had 1492 total hip arthroplasties. All of the operations were done through a posterior approach. For the purpose of this review, the duration of follow-up was limited to a minimum of three months. No patient was lost to follow-up. Any thromboembolic complications that may have occurred after the third postoperative month were not considered to be related to the operation and were not recorded. RESULTS: A fatal pulmonary embolism occurred after two arthroplasties (0.13 percent), a nonfatal pulmonary embolism was diagnosed after fourteen (0.94 percent), and deep venous thrombosis developed after fifteen (1.01 percent). Regional (epidural) anesthesia was used for 1099 arthroplasties (73.7 percent), and general anesthesia was used for 393 procedures (26.3 percent). A fatal pulmonary embolism occurred after two (0.18 percent) of the 1099 arthroplasties that had been performed with regional anesthesia and after none that had been performed with general anesthesia (chi square = 0.22; p > 0.05). A nonfatal pulmonary embolism occurred after two procedures (0.18 percent) that had been done with regional anesthesia and after twelve (3.05 percent) that had been done with general anesthesia (chi square = 25.3; p < 0.001). Deep venous thrombosis was diagnosed after seven procedures (0.64 percent) that had been performed with regional anesthesia and after eight (2.04 percent) that had been performed with general anesthesia (chi square = 5.45; p < 0.025). We detected a significant difference between men and women with respect to the rate of nonfatal pulmonary embolism (chi square = 4.36; p < 0.05). With the numbers available, we found no significant differences between the 774 arthroplasties (51.9 percent) in patients who had worn graded elastic stockings and the 718 arthroplasties (48.1 percent) in patients who had used intermittent compression devices, between the 774 arthroplasties (51.9 percent) that had been performed in Florida and the 718 (48.1 percent) that had been done in California, or between the 1313 primary arthroplasties (88 percent) and the 179 revision arthroplasties (12 percent), with regard to the prevalence of fatal pulmonary embolism, nonfatal pulmonary embolism, or deep venous thrombosis (p > 0.05 for all comparisons). In summary, we found that the type of compression (graded elastic stockings or intermittent compression devices), the geographic location (California or Florida), and the type of operation (primary or revision) had no significant effect, with the numbers available, on the rate of thromboembolic complications. Compared with general anesthesia, the use of regional anesthesia was associated with a significantly lower rate of nonfatal pulmonary embolism (p < 0.001) and deep venous thrombosis (p < 0.025). Both patients who had a fatal pulmonary embolism had had regional anesthesia (p > 0.05). CONCLUSIONS: This inexpensive method of prophylaxis against thromboembolic disease after total hip arthroplasty, which was based primarily on the use of aspirin as the pharmacological agent and the performance of intraoperative and postoperative exercises, produced good clinical results.
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