| 摘要 |
A retractor for use in surgery, such as chest surgery, comprises two arms ( 4,6 ) each adapted to carry a blade ( 14,16 ) engageable with one side of an incision, the two arms ( 4,6 ) being connected by a pivot ( 8 ) at one end portion such that the arms ( 4,6 ) can be pivoted between a closed position and an adjustable open position in which the arms define a substantially V-shaped configuration in which the blades ( 14,16 ) maintain the sides of the incision in inclined relation. The arms are moved to the open position by means of a curved rack ( 20 ) carried by one of the arms ( 6 ) and a pinion ( 28 ) carried by the other arm ( 4 ), the pinion ( 28 ) being releasably lockable to retain the arms in the open position by a ratchet and pawl mechanism.
|
