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Biomedical subjects

R Rahmanzadeh

Publications and source records attributed to R Rahmanzadeh.

At least 37 records · Page 2Linked to original sources
PubMed1990

[Patellar and quadriceps tendon ruptures].

Ten cases of rupture of quadriceps tendon and seven cases of rupture of the patellar ligament were studied. All patients were reexamined. One must differentiate between rupture of the quadriceps tendon (tendon ruptures in elderly patients with degeneratively changed tendon in trivial trauma) and rupture of the patellar tendon (tendon rupture in younger patients with considerable trauma). All the patients were discussed with regard to accident mechanism, histology, underlying systemic and local diseases, therapy and results. There were good results in all patients with rupture of the patella tendon. In seven of the ten patients with quadriceps tendon rupture, we noted also good results. Three patients had residual pain and restricted motion and function of the knee. In two of these cases, diagnosis and reconstruction was delayed for months, the other patient had an infection of an implanted knee endoprosthesis in the injured knee.

Adult↗
PubMed1990

[Treatment of distal radius fracture with plate osteosynthesis].

The indications for osteosynthesis of distal radius fractures with a T-plate have been precisely defined. They include Smith's fractures, Barton's fractures, reversed Barton's fractures and the fracture types A3, C1 and C2 according to the A0 classification. The surgical approach is dorsal for the extension type fractures and palmar for those of the flexion type A. Correct diagnosis and accurate operative technique make it possible to achieve favourable results in the treatment of these often compound fractures. Results are presented for 105 patients who underwent osteosynthesis of distal radius fractures with a T-plate.

Bone Plates↗
PubMed1989

[Plate osteosynthesis of forearm fractures in adults and adolescents. Long-term results and problems].

Based on the results reported in the literature, the method applied by us in the management of forearm shaft fractures is presented and explained. The advantages and remaining problems of the method are discussed on the basis of the results obtained in the follow-up of 45 ulna-, radius- or forearm shaft fractures treated by means of DC-plate osteosynthesis. The procedure is complication-free and has a low pseudarthrosis rate. To avoid refractures, the material should not be removed earlier than one and a half year following osteosynthesis. Axis shifts of more than 10 degrees and differences in length of more than 2 mm should be avoided and should be corrected in working patients.

Adolescent↗
PubMed1989

[Developments in the treatment of fractures of the coxal end of the femur].

The therapeutic concept for proximal femur fractures has changed to varying degrees from 1978 to 1988 in the Department of Traumatology and Reconstructive Surgery at Steglitz Medical Center. In general, conservative therapy has been abandoned. Alloplastic joint replacement is performed in patients with coxarthrosis in the fracture area. A head prosthesis is chosen for those with a life expectancy of less than eight years. Clearly favourable results have been achieved in our department with the Duokopf prosthesis. Patients with a higher life expectancy are submitted to a total hip endoprosthesis, preference being given in cases of collum femoris fractures to the combination of a Spotorno shaft and a Morscher acetabulum. Loading should only be partial for five weeks in patients treated with this cement-free total endoprosthesis. We use the Duokopf prosthesis in the combination of a Spotorno shaft with a Uni-Hip head. We submit these patients to full loading primarily. --We have completely abandoned Ender nailing. We prefer the dynamic hip screw for per- and intertrochanteric femur fractures. For subtrochanteric femur fractures, we use the condyl plate. For lateral collum femoris fractures we have used the four-hole angle plate until 1988. Since 1989 we also use the dynamic hip screw. The one-hole angle plate is used for osteosynthesis in cases of medial collum femoris fractures.

Adult↗
PubMed1989

[Prosthesis loosening caused by infection of the hip joint. Current status and personal procedures in indications for primary and secondary exchange surgery].

More than 50,000 hip-joint endoprostheses are annually inserted in the FRG. Surgery for replacement of prostheses has, consequently, grown in frequency. Reported in this paper are 27 operations for replacement of hip-joint prostheses that had become necessary for infectious problems. Follow-up checks confirmed for 14 of 27 patients sufficient control of infection, ability to walk, and tight position of prosthesis. Replacement should be performed in two surgical sessions, since a short-time Girdlestone situation without extension treatment or immobilisation is properly tolerated by patients with walking capacity, and the benefit of infection control should be the primary consideration.

Aged↗
PubMed1988

[Indications for hip joint replacement. Early and late results].

Marked advances have been made in the application of hip joint endoprostheses since their extensive dissemination in the early 70's. Implantation material, surface structure, design of the prosthesis and surgical techniques have been better adapted to the biological and biomechanical conditions. Nevertheless, the long-term prognosis remains uncertain, and joint-saving interventions continue to take priority. The possibilities for the application of endoprostheses in cases of degenerative, posttraumatic and congenital changes and tumourous destructions have been improved by extended prostheses and additional measures. Whereas the indication for a prosthesis to save the mobility of the patient is established more frequently for older patients suffering from basic diseases with a limited life expectancy, osteolysis due to bone tumours or metastases, hip-joint replacement in younger patients should always be performed as a last resort, even if the prognosis is better.

Femoral Neck Fractures↗
PubMed1986

[Indications for conservative or surgical treatment of fresh ruptures of the outer ligament].

The significance of the outer ligament lesion of the ankle joint derives from its frequency. Inadequate diagnostics lead to poor treatment results. It is imperative to make held images with the supporting apparatus in 2 planes. The guidelines for treatment are obtained from the measured values. We thus achieve our therapeutic aims: ligament stability with freedom from symptoms, perfect mobility and load capacity and the avoidance of arthrosis.

Ankle Injuries↗
PubMed1985

[Dislocation of the head of the fibula--diagnostic and therapeutic problems].

Luxation of the head of the fibula in the proximal tibiofibular joint is rare and is often overlooked. Pointers in this direction should be a swelling above the head of the fibula that is sensitive to pressure, an inexplicable pattern of signs involving the fibula, as well as an undefined insecurity of gait associated with the absence of other injuries in the genicular area. Diagnosis is best confirmed in the hospital by means of luxation or repositioning manoeuvres at the joint. The experienced physician can draw further conclusions from x-ray films of the forced extreme joint position. Therapy depends exclusively on the severity of complaints of the patient and must be determined individually for each patient.

Adult↗
PubMed1982

[Corrective osteotomy of the coxal end of the femur].

Malpositionings at the coxal end of the femur are mostly congenital or are produced post-traumatically by unsatisfactory osteosyntheses or secondary varus deformity if load was applied too early. Such malpositionings can occur after fracture of the neck of the femur or also after pertrochanteral fractures. Frequently, they present technical difficulties, since the anatomy of the coxal end of the femur is changed due to trauma and operation, and also because there is often a clearly noticeable inactivity atrophy as a result of prolonged duration of the disease. The bony substance into which the adjustment plate is anchored in the neck of the femur, may also have been weakened by defects from other implants. Although operation and after treatment are frequently rendered difficult under these circumstances, restoration of a hip joint capable of sustaining load is usually achieved. Restoration can be limited if infections or irreparable necroses of the head of the femur have occurred.

Bone Plates↗
PubMed1981

[Comparative examinations on diagnosis and therapy of fresh injuries of the exterior ligaments (author's transl)].

We are conducting a standardized investigation of injuries of the exterior ligaments, using X-ray films taken in forced extreme joint position in two planes. The advantage of this method is the comparison of the X-ray films taken while exerting a constant force. The X-ray films must be taken in two planes to permit a clear statement about the severity of the injury. It is necessary to exclude a hypermobile ankle joint by means of a comparative X-ray of the healthy limb. Adequate therapy with an elastic bandage, plaster cast or surgery based on this diagnostic method will ensure good results.

Adolescent↗
PubMed1980

[Restorative surgery on the lower leg using muscular shifting grafts -- anatomical and clinical aspects (author's transl)].

The long clinical course and the great number of complications after open fracture of the lower leg are due to the thin soft-tissue layer coating the tibia. Large defects may occur here and expose the tibial periosteum. In post-mortem studies, various methods to repair pretibial defects by means of muscular shifting grafts were investigated. It is possible to cover almost the entire tibia with the aid of pedunculated muscular flaps (M. gastrocnemius, M. soleus, M. abductor hallucis). The muscles can be grafted primarily with split skin. By this, stable wound conditions are created, allowing the fracture to heal after osteosynthesis without the risk of a secondary infection. One case of repair, using the M. gastrocnemius, is demonstrated.

Aged↗
PubMed1980

[The pros and cons of postponed primary osteosynthesis (author's transl)].

The postponed primary osteosynthesis results from bad condition of the patient or from organisational problems in the clinic, although there is an indication for primary operation. Because of the loss in function, joint fractures should generally be operated within the first six to eight hours. But because of their own experience, the authors recommend the postponed primary operation in cases of fractures of the tibia plateau and the acetabulum. The advantages of the postponed operation are: careful planning and preparation of the operation, judgement of skin, and choice of an experienced surgeon. They are compared to the disadvantages: alteration of bone-fragments by resorption and disorders in nutrition of joint-cartilage. In the author's opinion the advantages outweigh the disadvantages, especially important is the performance of the operation by an experienced surgeon. The rate of 16% arthroses in a two-years postoperative study on 44 patients with fracture of the tibia plateau seems to confirm this conception.

Acetabulum↗