Vena cava filter use in cancer patients with acute venous thromboembolism in California.
BACKGROUND
Few studies have evaluated the use of vena cava filters (VCF) in cancer patients with acute venous thromboembolism (VTE).


METHODS
Hospital discharge records of patients who were admitted with a principal diagnosis of lower extremity deep-vein thrombosis or pulmonary embolism and cancer in California between January 1, 2005 and December 31, 2009 were analyzed. Multivariable logistic regression analysis was used to identify variables associated with VCF use.


RESULTS
A VCF was placed in 2747 (19.6%) of 14,000 cancer patients. The percentage of patients treated with a VCF varied widely across hospitals, from 0% to 52% (mean=19.2%, median=17.2%), and by cancer type, ranging from 8% for lip/oral to 43% for brain. Using multivariable analysis, the strongest predictors of VCF use were a diagnosis of brain cancer (OR=4.6, CI: 3.7 -5.6), undergoing major surgery (OR=4.9, CI: 3.9 -6.1), and bleeding (OR=2.7, CI: 2.0-3.5). Other factors significantly associated with VCF insertion included hospital characteristics (larger, urban and private), and greater severity-of-illness at the time of admission. Only 1083 (7.7%) of patients had an absolute contraindication to anticoagulation (bleeding or surgery).


CONCLUSIONS
A VCF was deployed in approximately 20% of acute VTE patients with cancer, but use varied widely between hospitals and cancer types. The strongest risk factors were undergoing surgery, active bleeding, and having brain cancer. Only 21% of VCF treated cancer patients had a strict contraindication to anticoagulation therapy. Further research is needed to determine if VCF use is of any benefit in cancer patients with acute VTE.
Division of Hematology Oncology, Department of Internal Medicine, University of California, Davis School of Medicine, USA.
Gwendolyn
G
Ho
Division of Hematology Oncology, Department of Internal Medicine, University of California, Davis School of Medicine, USA.
Ann
A
Brunson
Division of General Internal Medicine, Department of Internal Medicine, University of California, Davis School of Medicine, USA.
Richard
R
White
Division of Hematology Oncology, Department of Internal Medicine, University of California, Davis School of Medicine, USA; Section of Hematology Oncology, VA Northern California Health Care System, USA. Electronic address: Ted.wun@ucmdc.ucdavis.edu.
Ted
T
Wun
D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D000925:Anticoagulants / Q000627:therapeutic use; D002140:California; D005260:Female; D006470:Hemorrhage; D006801:Humans; D007866:Leg; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009369:Neoplasms / Q000150:complications* / Q000601:surgery; D016017:Odds Ratio; D011655:Pulmonary Embolism / Q000150:complications* / Q000188:drug therapy* / Q000601:surgery; D012189:Retrospective Studies; D012307:Risk Factors; D016306:Vena Cava Filters / Q000009:adverse effects*; D020246:Venous Thrombosis / Q000150:complications* / Q000188:drug therapy* / Q000601:surgery
D000925:Anticoagulants
Cancer and thrombosis; Deep venous thrombosis; Pulmonary embolism; Vena cava filter; Venous thrombosis