When I have confirmed that bleeding is coming from the tunnel and not from the venotomy, I Identify the spot along the tunnel where the bleeding is coming from as described by Dr. Sequeira, and I insert a horizontal mattress suture with Prolene or Nylon and remove it two to three days later. This if a pressure dressing does not work. If the bleeding is from the exit site i use chemical cautery with - a Silver nitrate stick and remove excess Silver nitrate with a cotton swab or gauze then apply sterile pressure dressing.