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Biomedical subjects

R Schabus

Publications and source records attributed to R Schabus.

46 records · Page 3Linked to original sources
PubMed1986

Anatomical bases of patellar tendon grafts used in anterior cruciate ligament reconstruction.

In 24 fresh specimens the blood-supply of the infrapatellar fat-pad was investigated by injection. In some of the specimens, Clancy's pedicled patellar tendon graft for anterior cruciate ligament reconstruction had been performed before injection. The fat-pad is supplied by vessels forming a plexus supplying the tendon. In the tendon grafts injected after Clancy's procedure, no vessels were found penetrating the patellar tendon at its patellar and tibial attachments. Filled vessels were found by histologic methods and the Spalteholz technique.

Dissection↗
PubMed1985

[Results of Slocum-Larson patellar bridling].

The Slocum and Larson's surgical repair of the laterally dislocating patella is described. The results of 32 operations are discussed, follow-up-time was one to four years. 25 patients have no problems and have full activity in sports. Two patients have femoropatellar pain in the operated and two in the non-operated knee joint; so they had no normal athletic activity but they had no subluxation pain. One patient had a recent traumatic dislocation of the patella in landing a backward salto. We have obtained good results by the method of Slocum and Larson compared with various techniques of transferring tibial tubercle. This operation can be used also in young patients without disadvantages being a mere soft tissue procedure. The importance of lateral release and VMO-plastik is emphasized.

Adolescent↗
PubMed1985

[Endoscopy of the spinal canal].

The feasibility of inspecting the spinal canal with a needle-arthroscope of 2.7 mm diameter was tested in the spine of fresh autopsy specimens. It was possible to identify all the structures within the spinal canal, which was also photographically documentated. The clinical application of spinaloscopy for diagnostic purposes and for providing prognostic signs respectively in paraplegic spinal injuries is discussed.

Adolescent↗
PubMed1981

[A malignant mixed tumor of the breast].

A case of a malignant mixed tumor of the female breast is presented. The epithelial part of it showed characteristics of a benign adenoma, the mesenchymal component those of a polymorphonuclear and spindle cellular sarcoma. Pathogenesis and histogenesis of this neoplasm as well as the literature on the subject are discussed. The incidence of this tumor and of sarcomas of the breast, in general is reported.

Adenoma↗
PubMedDate not supplied

The diagnosis of meniscal tears in athletes. A comparison of clinical and magnetic resonance imaging investigations.

This study evaluated the predictability of clinical examination alone in comparison with magnetic resonance imaging in the diagnosis of meniscal tears in competitive athletes. Ninety-three competitive athletes were prospectively investigated between 1992 and 1995. A total of 57 athletes were operated on based on clinical examination alone, and the 36 remaining athletes had magnetic resonance imaging before surgery. The correct diagnosis of a meniscal lesion was made on clinical examination alone in 83 athletes (89%) and on magnetic resonance imaging the correct diagnosis was also made in 89% of 36 athletes. The overall values for the clinical investigation of the medial and lateral menisci combined were 94.5%, 91.5%, 99%, 96.5%, 87% for accuracy, positive predictive value, negative predictive value, sensitivity, and specificity, respectively. The overall values for magnetic resonance imaging of the medial and lateral menisci combined were 95.5%, 96.5%, 91.5%, 98%, 85.5% for accuracy, positive predictive value, negative predictive value, sensitivity, and specificity, respectively.

Adolescent↗
PubMedDate not supplied

The effect of different isolation techniques on human osteoblast-like cell growth.

Surgical treatment of post-traumatic or neoplastic bone defects often represents a problem in orthopaedic routine. Autologous tissue always stands for the first choice material. The recent therapeutic approaches for tissue repair of bone defects attempt to mimic the natural process of bone repair by delivering a source of cells capable of differentiating into osteoblasts. In this study two different types of human osteoblast cell harvesting were compared in primary cell culture to evaluate the best way to obtain cells for clinical use. Numerous articles describe the characteristics of each one of these systems, but there is no report comparing the influence of these different isolation techniques on cell growth. Cultures from 22 bone specimens obtained from donors were established in two different ways and their proliferation was compared. An enzymatic procedure to extract human osteoblasts (hOBcol) was used in one group; spontaneous cells outgrowth, human osteoblasts (hOBsog) was expected in the other group. Cells of both groups were characterised as osteoblasts by immunohistochemical staining with Bone Morphogenetic Protein-2,4 (BMP-2,4), expression of collagen type I as well as the amount of alkaline phosphatase activity (ALP) detected in the cell cultures. We found that the time needed in primary cultures till confluence was dependent on the age of the donors as well as on the method of cell harvesting. Cells from under 65-year old donors were growing significantly faster by the hOBcol method as compared to hOBsog 20.57 +/- 2.99 days vs. 30.00 +/- 4.36. Cells harvested from donors older than 65 years of age needed 23.88 +/- 2.95 in the hOBcol compared to 34.25 +/- 4.27 days in the other group. In the experimental cultures, after one passage with trypsin/EDTA, there was a significant difference between the two groups. There was an improved cell growth in the hOBsog group found on days 8, 9 and 10 of cultivation. Immunohistochemical staining as well as ALP activity were similar in both groups. In conclusion this study evaluated an important step for a tissue engineering approach to the repair of bone defects, which may have clinical applications in post-traumatic orthopaedic surgery.

Adult↗