Biomedical subjects

M Füsting

Publications and source records attributed to M Füsting.

4 recordsLinked to original sources

PubMed1993

[Current developments in ultrasonography of the meniscus].

Sonography of the meniscus is a new diagnostic method, the instructive value and clinical relevance of which are subject to controversy. Sonographic assessment of the meniscus requires the use of focusing that can cope with the different anatomical conditions of the individual parts of the meniscus and can largely eliminate artifacts by means of wide sound-wave propagation. The dynamic examination technique allows the identification of both longitudinal and flap tears, which are relatively easy to diagnose, and of tear formations that are harder to visualize, such as horizontal and transversal tears. A sonographic criterion of a tear is the detection of a clearly visible, strong-signal double or single-stroke reflection pattern that can be traced in several section planes. While sonographic examination allows location of the tear, definite conclusions as to the shape of the tear are not possible on the basis of the echo pattern. In the literature, the statistical results, depending on the patient group and technical equipment, vary between 76% and 100% for sensitivity and between 50% and 97% for specificity, 74% and 93% for accuracy and between 61% and 95% for the positive prediction value. Sonographic examination of the meniscus is an easily available, noninvasive imaging technique that, as a supplement to clinical findings, can be used to optimize preoperative diagnosis and to check the indication for arthroscopy. Careful consideration of the technical requirements and systematic performance of the dynamic examination should lead to further improvement in the examination results and to growing clinical significance in the future.

Humans↗

PubMed1991

[Dynamic examination technique in meniscus sonography].

The aim of this study was to introduce an improved dynamic examination technique for sonographic assessment of the menisci, a technique that takes into account the special anatomy and function of the knee joint. The dynamic examination technique was used together with a 7.5 mhz sector transducer fitted with a water or PVC pad attachment when the area around the anterior horn and the pars intermedia was being scanned. Misinterpretation as a result of confusing reflections from a tear with the Hoffa fatty pad, popliteal tendon or popliteal groove can be largely avoided owing to the better sonoanatomic imaging and orientation. Diagnosing lesions of the meniscus from echogenic torn surfaces has also become easier thanks to dynamic examination. 60 patients with, for the most part, chronic knee-joint complaints were selected. A comparison of sonographic and arthroscopic findings demonstrated that large percentages of tears in the meniscus can be detected (76.7%) or ruled out (90.0%), and that recent longitudinal tears, flap and non-luxated bucket-handle tears can be considered to be "ideal" tear shapes. Because of its high specificity, sonography of the meniscus presents itself as a suitable method when lesions have to be ruled out, especially in recent knee injuries where clinical findings are unclear. On the other hand, if there are sure indications of a tear, sonography of the meniscus makes it possible to introduce therapeutic measures immediately and thereby to avoid any possible secondary damage.

Adolescent↗

PubMed1987

DNA pattern in choroid plexus papillomas.

Report on Feulgen-cytophotometric DNA studies of 8 choroid plexus papillomas. 7 tumours reveal distinct diploid stemlines in their karyogram. One tumour with oncocytic transformation exhibits a stemline in the triploid stage. These findings reflect the DNA pattern of a benign euploid neoplasm of the there investigated tumours.

Adolescent↗

PubMedDate not supplied

[Experimental studies of sonography of the meniscus].

The aim of this examination was to recognize and, if possible, avoid the origin of artifact images in sonograms caused anatomically and by the physics of ultrasound. Experimental investigations were carried out in a waterbath on models of knee joints using Schlierenoptics and on specimens from corpse knees. When a sector transducer was used, the artifact images that originated in the joint cavity appeared outside the cavity on the sonogram so that there were no danger of mistaking them for reflected images of tears in lesions of the meniscus. In sonography, the surfaces of tears reflect a strong signal, but diagnosis depends on the position of the edges of the tears to the direction of the ultrasonic waves, which means to get a reliable record of tears of the meniscus is only possible by means of a dynamic examination technique.

Humans↗