Abstract: A femoral tibial spreader (100) for spreading adjacent bones includes a radial measurement gauge (111) for providing incidia corresponding to an amount of force being applied to the forward ends (105,106) of the femoral tibial spreader (100). The femoral tibial spreader (100) may be used, for example, to separate the femur (301) and tibia (302) during knee surgery. The radial measurement gauge (111) may be used to determine an amount of force being applied to the femur (301) and tibia (302), for example, by the medial and arterial ligaments. Two handle members (104,109) are squeezed together, which causes the forward ends (105,106) to open. A biasing member (110) allows a measurement extension (108) to pivot towards a handle member under tension, thereby providing a measurement of force applied by the ligaments.

Abstract: A hip cup extraction apparatus (101) comprising a shaft (402), a handle (404), a semicircular cutting blade (406), a spring loaded latching member (408), and a head (100) for removing a hip cup (405) from a pelvic bone (401). The head (100) includes a semispherical section (102) terminating in a substantially planar surface (104), a hip cup extraction apparatus aperture (106), a retaining sleeve (108), and a three sided void (110). The head (100) may be configured for selective attachment to the hip cup extraction apparatus (101). The hip cup extraction apparatus (101) is inserted into the hip cup extraction apparatus aperture (106), and an optional spring loaded latching member (408) retains the head (100) in place. As the head (100) is being attached to the hip cup extraction apparatus (101), the semicircular cutting blade (406) may pass through the three sided void (110). Once the head (100) is attached to the hip cup extraction apparatus (101), the head (100) is inserted into the hip cup (405).

Abstract: A leg length gauge for use during hip joint replacement surgery to insure that the overall length of the patient's leg subsequent to the surgery is substantially the same as it was prior to the surgery. A first pin is inserted into a patient's ilium and a second pin is inserted into the patient's femur. A removable gauge including an adjustably coupled pair of members having pin receiving apertures for receiving the first and second pins is positioned on the pins. One member includes a base portion provided with one of said pin receiving apertures and having an elongated leg extending from the base portion. The other member is provided with the other pin receiving aperture and includes a transverse aperture for receiving the elongated leg. The elongated leg is selectively adjustably secured within the transverse aperture by tightening a thumbscrew.

Abstract: A hand-held microscope has two articulated members movable towards and away from each other for focusing. One member holds a specimen to be examined and has an object aperture with which the specimen is aligned during use. The other member has a lens aperture aligned with the object aperture and bears a lens member having at least two different lenses thereon and which is rotatably mounted thereon for bringing any one of the lenses into alignment with the object aperture.