title: Does antiplatelet therapy increase the risk of hemoptysis during percutaneous transthoracic needle biopsy of a pulmonary lesion?
abstract: OBJECTIVE
  The purpose of this article is to evaluate whether antiplatelet therapy increases the occurrence and severity of percutaneous transthoracic needle biopsy (PTNB)-related hemoptysis.
  
  
  METHODS
  Our institutional review board approved this retrospective study, with waiver of informed consent. From May 2007 to December 2009, 1251 patients undergoing 1346 PTNBs constituted our study population. Of these PTNBs, 163 were performed in patients who had suspended antiplatelet therapy for less than 10 days (mean discontinuation time, 2.56 ± 2.35 days), and these patients were classified as antiplatelet agent users: 143 patients with single aspirin (mean discontinuation time, 2.55 ± 2.35 days), 12 patients with single clopidogrel (mean discontinuation time, 2.33 ± 2.10 days), and eight patients with dual-antiplatelet therapy (i.e., aspirin plus clopidogrel; mean discontinuation time, 3.12 ± 2.90 days). The influence of antiplatelet therapy on the occurrence and severity of PTNB-related hemoptysis was retrospectively evaluated.
  
  
  RESULTS
  Among 1346 PTNBs, there were 128 cases (9.5%) of hemoptysis, including 21 cases of severe hemoptysis (1.6%). Multivariate analysis revealed that dual-antiplatelet therapy (odds ratio [OR], 10.09), female sex (OR, 1.88), smaller lesions (OR, 0.88), deeply located lesions (OR, 1.17), and the use of cutting needles (OR, 3.22) were independent risk factors for overall hemoptysis. For severe hemoptysis, dual-antiplatelet therapy (OR, 13.02), ground-glass nodules (OR, 8.86), and deeply located lesions (OR, 1.24) were proven to be independent risk factors. Single-antiplatelet therapy suspended for less than 10 days was not a significant risk factor for either overall or severe hemoptysis.
  
  
  CONCLUSIONS
  Single-antiplatelet therapy suspended for less than 10 days is not an independent risk factor for the occurrence of PTNB-related hemoptysis, whereas dual-antiplatelet therapy increases its risk.
authors.affiliation: Department of Radiology, Seoul National University College of Medicine, Korea.
authors.forename: Yong Sub
authors.initials: YS
authors.lastname: Song
authors.forename: Chang Min
authors.initials: CM
authors.lastname: Park
authors.forename: Kyung Woo
authors.initials: KW
authors.lastname: Park
authors.forename: Kwang Gi
authors.initials: KG
authors.lastname: Kim
authors.forename: Hyun-Ju
authors.initials: HJ
authors.lastname: Lee
authors.forename: Mi-Suk
authors.initials: MS
authors.lastname: Shim
authors.forename: Jin Mo
authors.initials: JM
authors.lastname: Goo
mesh_terms: D001707:Biopsy, Needle / Q000706:statistics & numerical data*; D015984:Causality; D015897:Comorbidity; D005260:Female; D006469:Hemoptysis / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D008113:Liver Neoplasms / Q000453:epidemiology* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D011183:Postoperative Complications / Q000453:epidemiology*; D011292:Premedication / Q000706:statistics & numerical data*; D018570:Risk Assessment
chemical_list: D010975:Platelet Aggregation Inhibitors