Biomedical subjects

F Catani

Publications and source records attributed to F Catani.

42 records · Page 3Linked to original sources

PubMedDate not supplied

Functional evaluation in total hip replacement patients.

An evaluation of total hip replacement patients requires objective criteria that allow for the measurement of any changes in the biomechanics of the prosthesis and the effects of these changes on clinical findings. An evaluation of loading and joint movement during walking in these patients has been dealt with by many authors. In this study 15 patients who had undergone total hip replacement for coxarthrosis primary or secondary to congenital dysplasia were examined by kinematic and kinetic gait analysis, clinical evaluation, and radiographic evaluation of the position of the neocenter of prosthetic joint rotation. The patients with prostheses in congenital dysplasia presented with a pattern of walking that was significantly modified. In agreement with what is reported in the literature proximal positioning had less influence on gait parameters as compared to lateral dislocation. Furthermore, changes in positioning observed did not seem to have negative effects on joint loading, measured indirectly by the calculation of joint moments.

Adult↗

PubMedDate not supplied

Avulsion of the long head of the triceps in kidney transplant.

The authors describe a case of avulsion of the long head of the triceps in a patient with kidney transplant. An analysis of the case and a review of the literature suggest weakening of the osteotendinous junction due to the associated action of renal osteodystrophy and cortisone therapy.

Adult↗

PubMedDate not supplied

Rotationplasty in segmental resections of the femur.

The authors report 26 cases of high-grade malignant tumors of the distal femur (23 osteosarcomas, 3 Ewing's tumors) submitted to rotation-plasty. The five-years actuarial survival rate (in the 23 cases of osteosarcoma) was 69% and there was no incidence of local recurrence. The following complications were observed: wound dehiscence (6 cases), arterial thrombosis (in 2 patients submitted to resection and vascular termino-terminal suturing), paralysis of the sciatic nerve (2 cases), delay in consolidation (2 cases), traumatic fracture of the neo-femur (3 cases). All of the complications were resolved favorably, 5 of these requiring surgical treatment (33%). Satisfactory functional results were obtained in all of the cases, except in one patient who had limitation of the ankle joint subsequent to vascular compartmental syndrome. On the basis of the oncological, functional and biomechanical results reported in this study and in the literature, the authors discuss current indications for rotation-plasty.

Adolescent↗

PubMedDate not supplied

Clinical evaluation of resurfacing of the patella in posterior-stabilizing total knee replacement.

The authors report their experience in the implantation of 108 posterior-stabilized cemented total knee replacements, where in 43 cases the patella was not resurfaced (group 1) and in 65 in was resurfaced (group 2). The ability to perform daily activities, the subjective function of the patello-femoral joint and the index of patient satisfaction were evaluated by means of a telephone interview; furthermore, a clinical-radiographic evaluation was carried out in 50 cases. The results of the present study indicate the need of resurfacing the patella using a posterior-stabilized prosthetic design, based on the fact that more joint excursion, a low incidence of complications on the patello-femoral joint, and improved ability to perform daily activities were demonstrated.

Adult↗

PubMedDate not supplied

The role of muscular co-contraction of the hip during movement.

The joint biomechanics of the hip was studied analyzing the kinematic, kinetic, electromyographic and in vivo pressure parameters during walking, going up stairs, and getting up from a chair. The most significant clinical and biomechanical data emerged when the temporal correlation between intra-articular pressure variations and electric activity of the bi-articular muscles was studied. The presence of co-contraction of the bi-articular muscles during the support and oscillation phases was evident. The maximum joint pressure values were measured while getting up from a chair when the hip was flexed more than 100 degrees. The posterior region of the acetabulum was that most submitted to loading. This data is useful in gaining an understanding of joint physiology, in correctly setting up physio-kinesitherapeutic protocols, and in setting up pre-clinical prosthetic mechanical tests.

Biomechanical Phenomena↗

PubMedDate not supplied

Patellar resurfacing in tumor endoprosthesis: a study in regard to power transmission.

Relation between quadriceps muscle mass and knee extension strength was investigated after resection of malignant bone tumor and endoprosthetic replacement of the distal femur in 19 patients with patellar resurfacing (Group A) and 16 patients without resurfacing (Group B). In all cases, a modular cementless, hinged prosthesis had been used. Age and follow-up period were comparable in the 2 groups. Muscle mass was measured ultrasonographically and strength was evaluated isokinetically. All the data on the operated side are given as percentage of the non-operated side. There was a positive correlation between muscle mass and strength in both groups. By linear regression analysis, a slightly lower value of strength was predicted in the unresurfaced group than in the resurfaced group. Analysis of covariance revealed that the influence of patellar resurfacing on strength was significant. This factor should also be considered in making a decision about patellar resurfacing with a tumor endoprosthesis.

Adolescent↗