Showing papers on "Stair climbing published in 1988"

Functional comparison of posterior cruciate-retained versus cruciate-sacrificed total knee arthroplasty.

Abstract: Gait of 11 patients with bilateral paired posterior cruciate-retaining and cruciate-sacrificing total knee arthroplasties (TKA) was studied preoperatively and two years postoperatively on walking and stair climbing. Five-year clinical and roentgenographic examinations were included in the study. Differences between the two prostheses were noted both in level walking and in stair climbing. On level walking, cruciate-sacrificed TKA had more flexion in loading response and increased flexion and varus moments with increased muscle activity of quadriceps and biceps femoris. Abnormal gaits common to both types of knee were decreased flexion in stance and decreased single-limb stance. Both knees had a stiff-legged gait during stance. On stairs, the cruciate-sacrificed TKA substituted soleus muscle activity for knee stability. The single-limb stance and range of motion were similar for both knees. In clinical terms, the cruciate-sacrificed TKA is less efficient and has greater medial loading and higher joint reaction forces that may affect durability of the prosthesis. The five-year knee scores, patient satisfaction, and roentgenographic examinations were equal for both sets of knees.

Stair climbing: an alternative exercise modality for firefighters.

Abstract: The purpose of this investigation was to determine the maximal cardiorespiratory responses of firefighters to stair-climbing work and to compare these responses to maximal treadmill exercise. Thirty-eight firefighters volunteered to participate in the study. Maximal CR including oxygen consumption (VO2), ventilatory equivalent for oxygen (VE/VO2), minute ventilation (VE) and heart rate (HR) were measured during both stair climbing and graded treadmill exercise. The results showed that VO2max and HRmax were significantly lower, 7% and 2% respectively, and the VE/VO2 was significantly higher (6.7%) during the stair-climbing exercise. Maximal VE was not different between the two modes of exercise. The results suggest that since VO2max and HRmax were lower during stair climbing, the metabolic cost of firefighting tasks as related to VO2max on a treadmill may not be accurately reflected. Since stair climbing is a task-specific activity for firefighters, it is recommended that testing of firefighters be performed on a stair-climbing device, and that the difference in VO2max between treadmill and stair-climbing exercise be considered when recommending a desired fitness level for firefighters.

Stair climbing aid

Abstract: A device for helping a handicapped person move up and down a flight of stairs. The device includes a base having a pair of vertically spaced platforms which define intermediate steps between the steps of the stairs. By stepping from a lower step to the platforms and then to the adjacent upper step, a person may climb the stairs while lifting his feet vertically through only relatively short distances. A handle extends upwardly from the base and helps stabilize the person using the device. The handle also is used to move the device from step to step.

Stair climbing device

Abstract: A stair climbing device, such as a wheelchair for handicapped comprises a frame having two sides, two wheel pairs each arranged on a respective one of the sides of the frame, each of the wheel pairs having two wheels each provided with a rim and a center axis, two drive shafts provided for each wheel pair, the drive shafts extending parallel to one another and to the center axis and being driven jointly, the wheels of each of the wheel pairs being turnable relative to the frame about the drive shafts, each of the drive shafts being provided with a hub disc with which it is eccentrically connected, the rim of each of the wheels being concentrically and rotatably supported on a a respective one of the hub discs.

Stair-climbing device, such as for invalids' wheelchairs

Abstract: The stair-climbing device (15) which is suitable for example for wheelchairs (10) and driven by an electric motor has two running wheel pairs (17a/17b) which swivel about drive shafts (20a, 20b) which are separate and eccentric but driven together and which running wheel pairs thus successively come to rest on a step of the stair or are lowered thereon. At the same time, blocking of the individual running wheels during their swivel movement can be carried out by means of braking devices assigned to the individual running wheels (17a, 17b) in order to prevent an undesired rolling away of the wheelchair (10) over the edge of a stair. … …

Multipurpose ladder climbing hand cart

Abstract: The utility model discloses a multipurpose stair climbing hand cart, comprising a loading box, a push bundle, wheels, a child seat and stair climbing wheels. The stair climbing wheels are made by utilizing the evolvent principle. The utility model can easily deliver goods upstairs and load babies, and can run on the flat ground and climb stair. The utility model which has the advantages of simple structure and easy fabrication, effectively solves the problem of bumpiness when the common stair climbing hand cart goes up stairs, and is suitable for popularization in the tall buildings.

Stair climbing device, for example, for wheelchairs for the disabled

Abstract: The stair-climbing device (15) which is suitable for example for wheelchairs (10) and driven by an electric motor has two running wheel pairs (17a/17b) which swivel about drive shafts (20a, 20b) which are separate and eccentric but driven together and which running wheel pairs thus successively come to rest on a step of the stair or are lowered thereon. At the same time, blocking of the individual running wheels during their swivel movement can be carried out by means of braking devices assigned to the individual running wheels (17a, 17b) in order to prevent an undesired rolling away of the wheelchair (10) over the edge of a stair. … …