Abstract: An obstetrical device is provided for use during labor and childbirth to determine and monitor accurately the position of a fetal head and the configuration of the cervix using ultrasonographic techniques. The device comprises an elongated inflatable latex rubber sac closed at one end by a latex rubber diaphragm that is supported by a resilient peripheral ring. In use, the device is inserted into the birth canal with a portion of the sac positioned in the vaginal cavity, a portion extending through the cervical canal and with the diaphragm positioned in the uterus adjacent the fetal head. The diaphragm is maintained in the uterus by the flexible peripheral ring, which has a diameter greater than that of the cervical canal. With the device thus positioned, it is inflated with a saline solution causing it to expand, bear against, and take the shape of the vaginal cavity, uterus, and fetal head.

Abstract: A medical ultrasound training apparatus comprises a simulated body cavity adapted to contain a number of elements simulating the ultrasonic response characteristics of internal human anatomy. Simulated body fluid fills the cavity and surrounds and suspends the elements therein and a skin simulating membrane covers the cavity. A medical trainee performs ultrasound examination on the apparatus which produces ultrasound images similar to those produced by a live patient thereby providing the trainee with valuable experience in applying and analyzing the results of the ultrasound examination.

Abstract: A surgical instrument for performing a uterine cervical conization has a pair of elongated arms pivotally connected together intermediate their ends for scissor-like relative motion. One arm includes a coextensive probe at one end sized to be inserted through the cervical canal. The corresponding end of the other arm secures a cutter in position forming an acute cutting angle relative to the probe with the apex of the angle located adjacent to the distal end of the probe. Locking means is provided for releasably locking the arms in at least one predetermined relative pivotal position and consequently the cutter at a corresponding predetermined cutting angle relative to the probe. In use, the probe is inserted through the cervical canal with the cutter piercing the cervical tissue. At a sufficient depth, the arms and cutter are locked into position and the instrument is rotated about the axis of the probe to excise a cone-shaped tissue sample from about the mouth of the uterine cervix.