Prophylactic Strategies for Venous Thromboembolism in Total Shoulder Arthroplasty
Overview
This retrospective cohort study analyzed matched patients undergoing total shoulder arthroplasty (TSA) with and without chemical venous thromboembolism (VTE) prophylaxis. The study found no significant reduction in VTE incidence with prophylaxis but noted increased bleeding complications in the prophylaxis group.
Background
Venous thromboembolism, including deep vein thrombosis and pulmonary embolism, is a serious complication after TSA, with reported incidence varying widely. The increasing demand for TSA underscores the need for clear VTE prophylaxis guidelines. Current recommendations lack consensus, and the effectiveness of chemical prophylaxis agents such as aspirin and factor Xa inhibitors in TSA remains uncertain.
Data Highlights
Outcome
Prophylaxis Cohort
No Prophylaxis Cohort
Hazard Ratio (HR)
95% CI
p-value
Deep Venous Thrombosis (DVT) at 6 months
10 patients (censored)
10 patients (censored)
Not significant
Not reported
>0.05
Pulmonary Embolism (PE) at 6 months
10 patients (censored)
10 patients (censored)
Not significant
Not reported
>0.05
Gastrointestinal Bleed
Increased incidence
Lower incidence
Significant increase
Not reported
<0.05
Head Bleed
Increased incidence
Lower incidence
Significant increase
Not reported
<0.05
Hematoma
Increased incidence
Lower incidence
Significant increase
Not reported
<0.05
Key Findings
The incidence of VTE (DVT and PE) within 6 months post-TSA was low and not significantly different between patients receiving chemical prophylaxis and those who did not.
Chemical prophylaxis was associated with a statistically significant increase in bleeding complications, including gastrointestinal and head bleeds, as well as hematoma formation.
Propensity score matching balanced demographics and comorbidities, minimizing confounding effects in outcome comparisons.
The study included various chemoprophylactic agents with different mechanisms, but did not capture mechanical prophylaxis data.
Findings support the 2022 ICM-VTE consensus recommendation against routine chemical prophylaxis in TSA patients.
Clinical Implications
Given the low incidence of VTE and the increased bleeding risk associated with chemical prophylaxis, routine use of chemical agents for VTE prevention in TSA patients should be reconsidered. Individual patient risk assessment remains essential to guide prophylaxis decisions. Mechanical prophylaxis may still play a role but requires further study.
Conclusion
This large matched cohort study suggests that chemical VTE prophylaxis after total shoulder arthroplasty does not significantly reduce thromboembolic events but increases bleeding complications. These findings highlight the need for tailored prophylaxis strategies rather than routine chemical use.
References
Day et al. 2022 -- VTE Risk Following Shoulder Arthroplasty in Medicare Population
ICM-VTE Consensus 2022 -- Recommendations on VTE Prophylaxis in Shoulder Arthroplasty
AAOS Guidelines -- Individualized Risk Assessment for VTE Prophylaxis
NICE Guidelines 2007 -- LMWH Use in Upper Extremity Surgery
