Abstract: The invention relates to a biopsy forceps having two jaw-pieces (9) capable of being moved away from and of being moved towards each other while a maneuvering element (2) is sliding in a sheath (3). The two jaw-pieces (9) are pivoted about a ball (20) fixed on the end of the maneuvering element. The jaw-pieces (9) are partly housed in a passage in the end of the sheath (3). They are guided by a rod (8) while they are being moved away from each other and by the end surface of the passage in the sheath (3) while they are being moved towards each other.

Abstract: A transcutaneous device includes a base for attachment to a bone. The device includes a temporary stopper and a transcutaneous pillar containing electrical connections complementary to the electrical connections incorporated in the base. The base also comprises a sealed bacteriological protective membrane which can be perforated by electrically conductive pins of the electrical connections.