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Risk of Venous Thromboembolism Among Otolaryngology Patients vs General Surgery and Plastic Surgery Patients.

Risk of Venous Thromboembolism Among Otolaryngology Patients vs General Surgery and Plastic Surgery Patients.
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Cramer JD, Dilger AE, Schneider A, Smith SS, Samant S, Patel UA,


Cramer JD, Dilger AE, Schneider A, Smith SS, Samant S, Patel UA, (click to view)

Cramer JD, Dilger AE, Schneider A, Smith SS, Samant S, Patel UA,

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JAMA otolaryngology– head & neck surgery 2017 10 19() doi 10.1001/jamaoto.2017.1768

Abstract
Importance
Venous thromboembolism (VTE), which includes deep venous thrombosis or pulmonary embolism, is the number 1 cause of preventable death in surgical patients. Current guidelines from the American College of Chest Physicians provide VTE prevention recommendations that are specific to individual surgical subspecialties; however, no guidelines exist for otolaryngology.

Objective
To examine the rate of VTE for various otolaryngology procedures compared with an established average-risk field (general surgery) and low-risk field (plastic surgery).

Design, Setting, and Participants
This cohort study compared the rate of VTE after different otolaryngology procedures with those of general and plastic surgery in the American College of Surgeons National Surgical Quality Improvement Program from January 1, 2005, through December 31, 2013. We used univariate and multivariable logistic regression analysis of clinical characteristics, cancer status, and Caprini score to compare different risk stratification of patients. Data analysis was performed from May 1, 2016, to April 1, 2017.

Exposures
Surgery.

Main Outcomes and Measures
Thirty-day rate of VTE.

Results
A total of 1 295 291 patients, including 31 896 otolaryngology patients (mean [SD] age, 53.9 [16.7] years; 14 260 [44.7%] male; 21 603 [67.7%] white), 27 280 plastic surgery patients (mean [SD] age, 50.5 [13.9] years; 4835 [17.7%] male; 17 983 [65.9%] white), and 1 236 115 general surgery patients (mean [SD] age, 54.9 [17.2] years; 484 985 [39.2%] male; 867 913 [70.2%] white) were compared. The overall 30-day rate of VTE was 0.5% for otolaryngology compared with 0.7% for plastic surgery and 1.2% for general surgery. We identified a high-risk group for VTE in otolaryngology (n = 3625) that included free or regional tissue transfer, laryngectomy, composite resection, skull base surgery, and incision and drainage. High-risk otolaryngology patients experienced similar rates of VTE as general surgery patients across all Caprini risk levels. Low-risk otolaryngology patients (n = 28 271) experienced lower rates of VTE than plastic surgery patients across all Caprini risk levels. Malignant tumors were associated with VTE; however, the rates varied by cancer type and were 11-fold greater for cancers of the upper aerodigestive tract compared with thyroid cancers (odds ratio, 10.97; 95% CI,7.38-16.31). Venous thromboembolism was associated with a 14-fold higher 30-day mortality among otolaryngology patients (5.1% mortality with VTE vs 0.4% mortality without VTE; difference, 4.7%; 95% CI of the difference, 2.2%-9.3%).

Conclusions and Relevance
Most patients undergoing otolaryngology procedures are at low risk of VTE, indicating that guidelines for a low-risk population could be adapted to otolaryngology. Patients undergoing high-risk otolaryngology procedures should be considered as candidates for more aggressive VTE prophylaxis.

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