Comparison between aspirin 325 mg and enoxaparin 40 mg as extended thromboprophylactic agents following major orthopedic surgery in Jordan University Hospital
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Major orthopedic surgeries include total or partial hip replacement, total knee replacement and hip fracture surgeries. These surgeries are considered to have a high risk for the development of venous thromboembolism (VTE).
This study was carried out to compare the clinical outcomes of aspirin (acetylsalicylic acid) and enoxaparin as thromboprophylaxis agents following major orthopedic surgery.
A prospective cohort study was conducted at one tertiary hospital in Amman, Jordan, between October 2014 and March 2015. One hundred and seventy patients were enrolled in the study after completion of the informed consent form. A follow-up period of up to 35 days was started immediately after the surgery date. According to surgeon experience and patients’ risk factors, extended VTE prophylaxis was prescribed as enoxaparin 40 mg daily in 31.8% of patients (54/170) and as aspirin 325 mg daily in 68.2% of patients (116/170).
Compliance with treatment was significantly higher with aspirin than with enoxaparin (97.4 vs. 75.9% of patients; p = 0.003). Significantly more enoxaparin than aspirin recipients experienced symptomatic VTE (16.7 vs. 5.2%; p = 0.014) and had bleeding (11.1 vs. 2.5%; p = 0.018).
Aspirin represents a safe and effective choice for extended VTE prophylactic in low-risk patients, as it is effective (for a mean duration of 1 month), safe, associated with high compliance rates, and is less expensive than other options.
The authors’ thanks and appreciation go to the orthopedic staff of the Jordan University Hospital for their cooperation, and special thanks goes to Mr. Mahmmoud Ahmad Fahjan, a physiotherapist, for giving such attention and time.
Compliance with ethical standards
Conflict of interest
The authors have no relevant conflicts of interest.
The study was approved by the institutional review board of the Jordan University Hospital.
All study participants provided informed consent.
None to declare.
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