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Biomedical subjects

J Kruczyński

Publications and source records attributed to J Kruczyński.

At least 19 recordsLinked to original sources
PubMed2001

[Evaluation of localization and size of subcapital growth plate damage of the proximal femur in the MR image].

A group of 33 hips with avascular necrosis following developmental dislocation of the hip in 24 children was evaluated. The average age of the patients at the time of evaluation was 10 years (age ranging from 4 to 14 years). The study was focused on depiction of the subcapital growth plate of the femur by means of conventional radiography and MRI. On the basis of of the analysis of MR imagesa method of mapping the subcapital growth plate allowing location of the damage site is presented. The method will be useful in planning corrective treatment of the proximal femur e.g. trochanteric epiphysiodesis, corrective osteotomy and future removal of the bone bridges.

Adolescent↗
PubMed2001

[Clinical and radiological evaluation of the hip joints treated operatively due to Perthes disease with incongruence of articular surfaces].

The aim of the study was the clinical and radiological evaluation of the hip joints treated operatively due to Perthes disease with incongruence of articular surfaces. 35 patients (37 hips) treated between 1988-1990 by means of proximal femoral and transpelvic osteotomy were evaluated. Average age of the child at the time of the operation was 7 years 3 months (5-10 years), and at the final examination 15 years (12-19 years). The average follow-up period was 7 years 7 months (5-9 years). At the clinical examination there were 46 percent excellent results (17 hips), 32 percent good (12 hips), and 22 percent fair results (8 hips). Radiological examination showed 19 percent excellent results (7 hips), 35 percent good (13 hips), 5 percent of fair (2 hips), and 41 percent of poor results (15 hips). This study proved that the described operative treatment appeared a useful method in Perthes disease with incongruence of articular surfaces.

Adolescent↗
PubMed2000

[Development of the normal infantile hip joints assessed by MRI].

The paper provides an overview of the time of appearance of the secondary ossification centers and closure of the growth plates of the acetabulum and proximal epiphysis of the femur: the triradiate cartilage, the acetabular roof growth cartilage, the subcapital growth cartilage, the growth cartilage of the major trochanter, the growth cartilage of the minor trochanter. The study is based upon 62 MRI scans of healthy hips in 45 patients aged 3-21. The examined hips showed no pathologic traits--neither in the MRI scan nor in X-ray investigation. In Spin Echo and Turbo Spin Echo sequential imaging all obtained slices were used, on GRADIENT ECHO: FISP 3D, FLASH 2D, and FLASH 3D FAT SAT only chosen slices were included in the study. This way the following results were obtained: the ossification center of the major trochanter appears at the age of 3 in girls and at the age of 6 in boys, while the ossification center of the minor trochanter appears at the age of 6 in both sexes. The times of complete ossification of following growth cartilages were observed: for the triradiate cartilage ossification was observed at age 12-15 in girls and 15-16 in boys; for the cartilage of the acetabular roof ossification was noted at age 12-15 in girls and 15-18 in boys; ossification in the subcapital growth cartilage occurred at age 15-17 in girls and 16-18 in boys; the major trochanter growth cartilage ossifies at age 15-16 in girls and 16-18 in boys; for the minor trochanter ossification of the growth cartilage occurs at age 14-16 in girls and at age 16-18 in boys. The secondary ossification center of the pubic bone appears at age 9-11 in girls and 13-16 in boys and the secondary ossification center of the acetabular roof appears at age 13-17 in girls and boys. This study expand our knowledge on the development of the hip joint and facilitate the assessment of hip pathology.

Adolescent↗
PubMed2000

[An analysis of the selected parameters of the normal hip joint during growth in magnetic resonance imaging].

Dynamics of the selected parameters of the normal hip joint during growth has been presented. Fifty-three normal hips in 40 individuals aged 3-17 years were assessed with Magneton Impact MRI. The angles and indices were found on T1 coronal images in Spin Echo or Turbo Spin Echo sequence. Acetabular roof angle of Hilgenreiner, acetabular inclination angle of Sharp, Wiberg angle and Heyman-Herndon index were calculated with both bony and cartilaginous elements regarded. Parameters based on cartilaginous parts of the joint did not change during normal growth, but they do change if calculated with the use of bony landmarks reaching Acartilaginous values by the age of 14-15. The results suggest, that during growth gradual ossification of cartilaginous elements takes place but the proportions remain unchanged. The investigation determines the age of enhanced ossification and the age of its termination.

Adolescent↗
PubMed2000

[MR imaging of the subcapital growth plate of the proximal femur].

The possibilities of MR imaging of the subcapital growth plate of the proximal femur were evaluated in 36 children with 58 normal hips. The most common presentation of the area of subcapital growth plate on MR images was that of a hypointense band on T1-weighted images and a hyperintense band on sequences using fat saturation. Thinning of the growth plate with age was observed and in the older subjects in this group the growth plate was no longer visible.

Adolescent↗
PubMed2000

[The possibility of isolation, culture and storage of articular cartilage cells].

Lesions of articular cartilage are a common problem and concern millions of people world-wide. A decrease in physical activity and pain symptoms among patients resulting from damage to articular cartilage have prompted research concerning new methods allowing cartilage regeneration. State-of-the-art treatment of articular damage depends very much on genetic engineering techniques. The aim of this paper was to determine the authors' own way of isolation, proliferation and storage of chondrocytes of articular cartilage. The material consisted of 30 rabbits, from which fragments of articular cartilage were taken. The study consisted of the following stages: isolation, chondrocyte proliferation, cell and matrix identification, storage and MTT tests. Matrix digestion was achieved using the following solutions: 0.1% type IA collagenase; 0.025% trypsin, a mixture of collagenase and trypsin. The greatest amount of cells were found after digestion of the basic matter of cartilage by 0.1% solution of type IA collagenase. When ascorbic acid was added to the medium, a 25% increase in cellularity was observed. A cumulation of procollagen mRNA was noted in the isolated cells. After about 21 days the isolated cells formed a multilayer structure, with the space between the cells filled with a substance that showed typical traits for cartilage matrix. Storing the isolated cells for less than 48 hours at room temperature gave a 90% survival rate. Most cells died after less than 12 hours when stored at 4 degrees C. The described method of chondrocyte isolation proved to be effective in preparing material for treatment of articular cartilage lesion.

Cartilage, Articular↗
PubMed2000

[Images of growth zones of the femoral head, neck and greater trochanter in MR examination].

The possibilities of MR imaging were evaluated in 36 children with 58 normal hips. The analysed children were divided into 3 groups, basing on age at the time of investigation i.e. children less than 5 years old, age ranging from 5 to 12 years, and over 12 years of age. MRI allowed visualisation of all growth zones of the proximal femur. On T-1 weighted images the growth cartilage of the femoral head, neck, and greater trochanter were of intermediate signal intensity. On sequences using fat saturation and on gradient echo images the cartilage was of high signal intensity. The growth zone of the subtrochanteric cartilage was of low signal intensity on T-1 weighted images and high signal intensity on sequences using fat saturation and on gradient echo images. T-1 weighted images together with FLASH 3D FAT SAT seem to be sufficient for the analysis of the growth zones of the proximal femur.

Child↗
PubMed1996

[Long-term clinical assessment of the hip joint after conservative treatment for development dislocation complicated by avascular necrosis].

Clinical assessment of 61 hips in 36 adult patients treated in the past nonoperatively due to developmental dislocation of hip and affected with avascular necrosis of the proximal femur has been used as a base to present the fate of these joints. An attempt to relate the of avascular necrosis and clinical symptoms at the termination of growth has been made; clinical and radiographic examinations were compared with each other. At the final evaluation 30 excellent results were found, 20 good, 8 fair, and 3 cases were rated as poor. Clinical symptoms (pain, limp, extremity shortening, Trendelenburg and Duchenne signs) were present chiefly in cases of the most severe avascular necrosis of the femoral head and neck; in majority of patients clinical symptoms were present. Clinical outcome was usually more satisfactory than radiological one. Severity of avascular necrosis and deformity that followed clearly determined final clinical outcome.

Adolescent↗
PubMed1995

[Medial patellar plica of the knee in MR examination and arthroscopy].

MRI method of assessment of medio-patellar plica of the knee is presented. The results have been verified arthroscopically. Twenty seven patients have underwent MRI of the knee, arthroscopy followed in 15 cases. MRI revealed the plica in 15 patients, no plica was found in 5 cases and 3 examinations were not conclusive. Arthroscopy confirmed pathology in 9 cases; the plica was also found in one of "not conclusive" cases. MRI rendered 0.7 specificity, 0.9 sensitivity and positive prognostic value was 0.6. MRI proved to be highly sensitive but delivered no means to differentiate symptomatic and asymptomatic plicae.

Adolescent↗
PubMed1995

[Changes in the subcapital growth plate due to avascular necrosis after treatment for congenital hip dislocation in radiologic, tomographic and magnetic resonance examinations].

The aim of this investigation was to compare magnetic resonance imaging and radiography in detecting subcapital growth plate changes due to avascular necrosis after treatment for congenital dislocation of the hip. MRI was done in 16 patients (21 hips) aged 8-12 (mean 10 years), treated because of CDH. Radiographs were also done in all cases. Comparison between these two imaging modalities revealed superiority of MRI in both imaging of normal subcapital physis and imaging of its disorders.

Child↗
PubMed1994

[Magnetic resonance imaging and arthroscopy in meniscal and ligamentous injuries of the knee].

A series of 37 patients after knee injury underwent magnetic resonance imaging, in 21 cases subsequent arthroscopy has been performed. All patients had previous clinical diagnosis of meniscal and/or anterior cruciate injury. The changes within the menisci and anterior cruciate ligament have been confirmed by MRI in 76 per cent and 81 per cent respectively. In conclusion magnetic resonance imaging and arthroscopy are complementary methods in the knee joint diagnostics.

Anterior Cruciate Ligament Injuries↗
PubMed1994

[Remodeling of the hip joint with avascular necrosis during nonoperative treatment of congenital dysplasia, subluxation or dislocation].

Radiological analysis of 61 hips in 32 children served to present natural history of the nonoperatively managed dysplastic hip affected with avascular necrosis of the proximal femur that appeared during treatment. An attempt to establish relationship between the degree of avascular necrosis and radiological state of the hip after growth termination has been made. Ossification disturbances within the femoral neck of some hips and its prognostic value for proximal femur deformity have been assessed. The final radiological assessment revealed 18 per cent excellent results, 34.4 per cent good, 31.2 per cent fair and 16.4 per cent poor results. In hips with changes limited to the femoral head fair and poor results combined constituted less then 25 per cent. If the femoral neck was also involved the percentage amounted to 71. The results accomplished allowed for creating an own prognostic classification of avascular necrosis of the hip.

Adolescent↗
PubMed1990

[Avascular necrosis of the hip in radiologic images during treatment using the Freyka pillow for congenital hip dislocation].

Radiological picture of 823 hips in 636 children treated with the use of Freyka pillow between 1972 and 1976 was assessed. Avascular necrosis of the proximal end of the femur was found in 113 cases. The older the child was at the beginning of treatment the highest were the chances for developing avascular necrosis, but more serious changes were found in younger children. In the hips with greater initial dislocation changes were more frequent. A comparison between hips treated with Freyka pillow and those treated with different methods as to frequency of avascular necrosis was difficult due to the lack of uniformity in criteria for both diagnosis and assessment of the results.

Child, Preschool↗
PubMed1990

[Late assessment of the hip joint treated with the Freyka pillow without complications for congenital dysplasia and dislocation].

Clinical and radiological assessment of 504 hips in 389 patients of 10 to 21 years of age (13 years 10 month on average) has been carried out. The patients were treated by Freyka pillow in the childhood. Those with no reduction achieved primarily and operated on because of residual dysplasia as well as patients with severe avascular necrosis were excluded from this study. In 99% of the hips no clinical abnormality was found except for the change of rotation range--decreased external rotation. Radiographic assessment revealed 60% excellent results and 35% good ones with dominant residual feature of increased anteversion of the femoral neck. Remaining 5% were rated as fair--these were the cases that should have been operated on at a suitable time.

Adolescent↗