Biomedical subjects

R Zanasi

Publications and source records attributed to R Zanasi.

At least 19 recordsLinked to original sources

PubMed1990

Intramedullary osteosynthesis 3. Küntscher nailing in the humerus.

With regard for the principles that govern the correct application of intramedullary osteosynthesis in the long bones of the lower limb, the authors also support its use in the humerus. After an exhaustive survey of the specific problems at this site, a critical review of 130 cases observed over the last 15 years is reported. Extremely favourable results emerged in the treatment of the humerus with this means of synthesis, thanks to its surgical, mechanical and biological advantages.

Adolescent↗

PubMed1990

Intramedullary osteosynthesis. 4. Küntscher nailing in the ulna.

Intramedullary osteosynthesis with Küntscher nailing is an appropriate and extremely effective operation in the treatment of diaphyseal fractures of the ulna. Like the other long bones of the limbs (femur, humerus, tibia), in the ulna, as well, the advantages of the method, particularly when performed in closed surgery, are undeniable, so much so that this bone has a shape which is particularly favourable to nailing. The authors present and discuss their personal series of cases reporting results which are excellent. Thus, once again, the great reliability of this simple means of synthesis, in use for more than 20 years, is emphasised, and the subject is completed with a series of previous technical suggestions on how to obtain the best results.

Adolescent↗

PubMed1990

Intramedullary osteosynthesis. 1. Küntscher nailing in the femur.

Based on more than 20 years experience, the authors support the effectiveness of intramedullary nailing in the treatment of diaphyseal fractures of the femur. They review the history and advantages of this method and discuss the biomechanical principles on which it is based. Recent advances in technique have made it possible to secure proximal and distal anchorage in cancellous bone. This allows the method to be extended to more proximal and distal fractures than in the traditional method which is applicable only to the middle third. It also facilitates progressive axial compression, early loading and early mobilisation of the limb, thus creating the optimum biological conditions for consolidation and joint function. The closed method also reduces blood loss and the risk of infection. The techniques adopted to deal with more complex situations are described. These include moderately comminuted oblique and spiral fractures and certain bifocal fractures. Finally, the results of treating 450 cases are reviewed, with a longterm analysis of 198 patients.

Adolescent↗

PubMed1990

Intramedullary osteosynthesis. 2. Küntscher nailing in fractures of the tibia.

The purpose of this study is to discuss diaphyseal fractures of the tibia treated by intramedullary Küntscher nailing. This is based on 368 cases treated over the last 20 years. Closed intramedullary osteosynthesis favours the healing process, resulting in the early formation of callus which is of good quality and abundant. A careful review of the cases showed a 93.7% incidence of good results.

Adolescent↗

PubMed1989

Alignment of the extensor apparatus of the knee by alar and tuberosity transposition in recurrent subluxation of the patella and in external patellar hypertension syndrome.

In consideration of the multiple anatomical structures involved in recurrent subluxation of the patella and in external patellar hypertension syndrome, the authors propose an operation which allows for complete realignment of the extensor apparatus by transposition of the anterior tibial tuberosity, division of the external alar ligament, tightening of the internal alar ligament, and correction of the muscular insertions. In particular, removal of a capsulofascial band medially and its reimplantation into the external incision is proposed, thus avoiding the formation of retractive scar tissue. The long-term results, which were overall satisfactory, confirm the effectiveness of the operation proposed.

Adolescent↗

PubMed1988

Prevention of deep venous thrombosis in orthopedic surgery: effects of defibrotide.

The effectiveness of defibrotide was compared with that of calcium heparin and acetylsalicylic acid (ASA) in the prevention of deep venous thrombosis (DVT) resulting from orthopedic surgery. Sixty-three patients scheduled for elective or traumatological surgery, for the most part involving the hip joint, were recruited. The patients were randomly assigned to one of the following treatment groups: defibrotide (400 mg twice daily), administered intramuscularly (n = 19); calcium heparin (5,000 IU thrice daily), administered subcutaneously (n = 25); and ASA (100 mg on alternate days), administered orally (n = 19). Administration of the drug was started one day before surgery and continued until the seventh day after surgery. Each patient was monitored daily by means of the fibrinogen uptake test. The incidence of increased uptake did not differ significantly in the three groups (defibrotide, ten out of 19; calcium heparin, ten out of 25; ASA, seven out of 19). Conversely, a trend in favor of defibrotide was noted in cases of symptomatic DVT (defibrotide, one out of 19; calcium heparin, two out of 25; ASA, four out of 19) and pulmonary embolism (defibrotide, no cases; calcium heparin, one case; ASA two cases). On the strength of these findings, defibrotide therapy qualifies as a valid alternative to conventional DVT prophylaxis in orthopedic surgery.

Aged↗

PubMed1985

Intramedullary nailing with supplementary screw fixation (Grosse-Kempf technique).

The authors report their experience in 25 cases of fractures of the shaft of the femur and tibia treated by the Grosse-Kempf method of intramedullary nailing supplemented by screw fixation. They confirm the validity of this technique, which enlarges the indications for intramedullary nailing and offers an alternative method of osteosynthesis in the more severe cases.

Adolescent↗

PubMed1984

A new knee prosthesis.

A new knee prosthesis is described, with a 7-8 year follow-up of 14 cases. It is a hinge prosthesis with cortex bearing flanged stems reproducing the shape of the bones, self orientating and self-fixing. It can be used with or without cement. The results are very satisfactory.

Aged↗

PubMed1984

"Open door" operation to raise the vertebral arch in myelopathy due to cervical spondylosis.

The authors discuss the various operations used in the treatment of myelopathy caused by cervical spondylosis. Recently they have used the so-called "open door" operation, which raises the posterior vertebral arch, in place of laminectomy, hemilaminectomy and anterior interbody fusion. The "open door" operation is less radical, less traumatizing and safer, and ensures considerable enlargement of the vertebral canal. This enlargement can be clearly demonstrated by tomography as well as by the traditional radiological methods.

Aged↗

PubMed1982

Surgical equalisation of leg length: shortening of the long femur and lengthening of the short in one operation.

The Author suggests a technique for surgical equalisation of leg length. When the discrepancy is around 4 cm the Author obtains equalisation by simultaneous shortening and lengthening by removing from the long femur a cylinder of bone equal to half the discrepancy and grafting it into the short femur. Two Küntscher nails are used to obtain fixation. The technique has been successfully used on 4 cases.

Adolescent↗

PubMed1975

Valgus osteotomy of the hip.

The author's technique of valgus osteotomy is described. The advantages claimed are wide and easy correction combined with distal displacement of the great trochanter, restoration of physiological valgus, lengthening of the limb, and rigid and secure fixation. The indications, contra-indications, technique and results are discussed in an analysis of ninety-eight operated cases.

Acetabulum↗

PubMed1971