US Patent 7758516 Method and apparatus for sampling bodily fluid

Bodily fluid is sampled by causing a lancet mounted in a housing to be displaced toward a skin surface. A vacuum mechanism disposed on the housing is utilized to create a suction in the area to be incised causing bodily fluid to pool. The vacuum mechanism may then be deactivated thereby releasing the vacuum force on the skin, or repeatedly activated and deactivated. After the vacuum device has been utilized, the lancet is advanced to form an incision. The vacuum device may be activated, activated and deactivated, or repeatedly activated and deactivated after forming the incision. The sample may be withdrawn from the incision through a capillary tube.