Search PubMed⌕ Search

Biomedical subjects

H Shoji

Publications and source records attributed to H Shoji.

At least 235 records · Page 13Linked to original sources
PubMed1976

High tibial osteotomy for osteoarthritis of the knee: a changing concept.

High tibial osteotomy is most successful in patients with osteoarthritis with mild varus deformity which is not associated with subluxation of flexion contracture. Success in the valgus knee is limited. If tibial osteotomy is indicated, undercorrection is undesirable in the varus knee while overcorrection is undesirable in the valgus knee.

Contracture↗
PubMed1976

Secondarily infected total joint replacements by hematogenous spread.

Three fatal cases of infections that followed total joint replacement are repoarted, in each of which a hematogenous source of infection was identified. There also were five non-fatal cases presumable arising hematogenously which were reported in the literature. It is emphasized that concomitant disease, including active rheumatoid arthritis, may predispose to this complication.

Abscess↗
PubMed1976

Failed polycentric total knee prostheses.

Four failed polycentric total knee prostheses were evaluated by clinical examination of the patients and surface analysis of the removed prosthetic components. The failures were secondary to a poor relationship of the prosthetic components in three cases and to abutment of the tibial spine against the femoral condyle in the fourth. A poor relationship of the prosthetic components was not necessarily secondary to malpositioning, because the positioning may have been accurate but the relationships became abnormal when the knee was unstable. Scanning electron-microscope examination revealed various wear patterns but no significant correlation was noted between the morphological type and the degree of wear. Accurate placement of the components and restoration of knee stability were critical requirements for the polycentric total knee prosthesis to be successful.

Adult↗
PubMed1975

Kinematics of the knee after prosthetic replacements.

A method was developed for describing the flexion-extension motion of the knee joint in a sagittal plane, by employing ciné radiography and then plotting the loci of three points on the femur relative to the tibia. Normal knees displayed similar patterns, the curves were smooth, and flexion-extension curves superimposed. A standard knee outline with standard curves was defined, with which to compare the abnormal and prosthetic knees. Arthritic knee patterns differed significantly from the normals. The curves were irregular and the flexion-extension curves were different. Instability, joint surface irregularity and muscle spasm were thought to be the main causes. The curves for the MacIntosh tibial plateaus were abnormal in a similar way to the arthritics. This may have been due to residual instability and to the replacement of only one bearing surface. The condylar replacement prostheses (the uni-condylar, duo-condylar and Geometric) tended to produce close-to-normal knee patterns, probably due to restoration of a relatively normal geometry, and to replacement of both bearing surfaces. The knees with fixed hinge prostheses (Walldius, Shiers and Guépar) showed abnormalities of motion and of the relative postion of the femur on the tibia. These features would be undesirable for the correct functioning of soft tissues around the knee. The stabilo-condylar hinge, which did not require much bone resection, gave a motion comparable to the condylar replacements.

Adult↗
PubMed1975

Further observations on 85Sr scintimetry in intracapsular fracture of the hip.

Sixty-seven hip joints with intracapsular fracture and the 67 opposite, normal hip joints were studied with 85Sr scintimetry from two weeks to six years after fracture. Consistently, fractures that developed osteonecrosis showed extremely high counts at the fracture site and the femoral head; fractures that failed to unite also showed extremely high counts at the fracture site and somewhat lower counts in the femoral head; fractures that were healing normally showed counts at the fracture site that were higher than those of the normal, uninjured hip but lower than those at fracture sites where osteonecrosis or nonunion was present. Prediction of complications by 85Sr scintimetry is not reliable within the first few months on injury; thereafter, however, the procedure has definite diagnostic value, particularly for osteonecrosis.

Adult↗
PubMed1974

Spontaneous septic arthritis complicating rheumatoid arthritis.

Thirteen cases (in twelve patients) of septic arthritis complicating rheumatoid arthritis are reported. One ankle, one metacarpopophalangeal joint, one shoulder, and ten knees were involved. Staphylococcus aureus was cultured from twelve joints and Escherichia coli, from one. Treatment consisted of repeated needle aspirations in two patients, arthrotomy with Penrose drainage in six, and arthrotomy with through-and-through irrigation in four. Needle aspiration was the least effective therapy. The authors recommend as the treatment of choice: systemic antibiotic therapy and immediate arthrotomy followed by through-and-through irrigation with fluid containing the appropriate antibiotics.

Adult↗