title: A prospective randomized single-blind trial of patient comfort following vessel closure: extravascular synthetic sealant closure provides less pain than a self-tightening suture vascular compression device.
abstract: OBJECTIVE
  The Mynx M5 (AccessClosure, Inc., Mountain View, California, USA), a novel vascular closure device (VCD) utilizing extravascular synthetic sealant, may effectively seal the arteriotomy while reducing the pain associated with arteriotomy closure seen with other VCDs. To date, no studies exist comparing the pain associated with deployment between differing VCDs as a primary end point.
  
  
  METHODS
  A blinded, randomized controlled trial was performed comparing the Mynx and a popular VCD that utilizes a self-tightening suture, the Angio-Seal Evolution (St Jude Medical, St Paul, Minnesota, USA). Subjects were all adult patients undergoing diagnostic cerebral angiography via femoral access. Local anesthesia and intraprocedural intravenous pain medication were standardized. Pain was assessed using a horizontal visual analog scale both before and after VCD deployment.
  
  
  RESULTS
  64 patients were enrolled with 32 in each treatment arm. Both pain at closure and pain increase from baseline to closure were significantly higher in the Angio-Seal group (p=0.009 and 0.002, respectively). 88% of patients receiving an Angio-Seal reported closure as the most painful part of the procedure compared with only 34% of patients receiving the Mynx (p<0.001). No adverse events were detected in either treatment arm.
  
  
  CONCLUSIONS
  In a blinded, randomized trial comparing the Mynx with the Angio-Seal Evolution, pain with device deployment at arteriotomy closure was significantly lower with the Mynx. The reason for the large pain gradient between groups is likely due to the presence, and absence, of compression elements within the Angio-Seal and Mynx, respectively.
authors: Department of Neurosurgery, University of Florida College of Medicine, Gainesville, Florida 32610, USA. kyle.fargen@neurosurgery.ufl.edu
authors: Kyle M
authors: KM
authors: Fargen
authors: Brian L
authors: BL
authors: Hoh
authors: J
authors: J
authors: Mocco
mesh_terms: D000772:Anesthesia, Local; D002533:Cerebral Angiography / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005263:Femoral Artery / Q000601:surgery*; D006488:Hemostasis, Surgical / Q000009:adverse effects / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology / Q000517:prevention & control*; D010147:Pain Measurement; D016037:Single-Blind Method; D013537:Sutures / Q000009:adverse effects