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Biomedical subjects

H H Jend

Publications and source records attributed to H H Jend.

At least 37 records · Page 2Linked to original sources
PubMed1986

[Computed tomographic determination of the anteversion angle. Premises and possibilities].

Thirty-two macerated femora were examined by CT in order to determine the degree of anteversion and to relate this to the position of the femur and to the various reference lines quoted in the literature. The accuracy of CT is the same as that of the Rippstein method, provided the following conditions are met: 1. Position of the femur with its long axis perpendicular to the image plane. 2. Demonstration of the maximal configuration of the femoral condyles to enable one to construct a tangent to the dorsal aspect of the condyle. 3. Demonstration of the head and neck by a plane which divides the neck into approximately equal portions and sections the femoral head. These conditions are more easily met, even in immobile patients, than the requirements for the Rippstein method.

Femur Neck↗
PubMed1986

[Arthrography of the temporomandibular joint. Indications, technic and interpretation].

Articular dysfunction of the TMJ with anterior displacement of the disc ("internal derangement") is an entity which has been separated from other types of the "myofascial pain syndromes" and which can be treated conservatively or by surgery. Arthrography of the TMJ has contributed greatly to an understanding of normal and abnormal function and, in many cases, it can provide a diagnosis. On the basis of our experience with 80 investigations we discuss technical problems and the clinical indications. The indications for arthrography are in the pre-operative diagnosis, when clinical findings are uncertain, in order to demonstrate perforation, in order to confirm a suspected diagnosis and to assist in prosthetic treatment.

Arthrography↗
PubMed1986

[Computer tomography diagnosis of space-occupying lesions in the area of the base of the skull].

119 CT findings of examinations of the base of the skull conducted over a period of 52 months in 63 patients, were checked for their informative value. The CT findings were compared with clinical signs and symptoms and--if available--with findings from operations, biopsies and/or postmortem examinations (55 of 63 patients). For 42 CT findings, a total of 88 comparable findings obtained via conventional x-ray methods were available. This comparison showed a 66% superiority of CT over conventional radiography. The results point to a considerable superiority of CT both in the imaging of structures and in the detection of bony changes in the region of the base of the skull.

Brain Neoplasms↗
PubMed1985

Evaluation of tibiofibular motion under load conditions by computed tomography.

Evaluation of tibiofibular motion in vivo has been possible only by invasive methods. A new noninvasive method has been developed that uses computed tomography (CT). A special device was constructed for use on the CT table to study fibular motion with load placed across the ankle. From dorsal to plantar flexion the fibula moved 1.1 +/- 0.4 mm medially with an accompanying nonsignificant ventral shift and medial rotation. Application of load across the ankle did not significantly alter these findings. In a subgroup of predominantly females, plantar flexion of the ankle provoked a dorsal fibular motion of 0.7 +/- 0.8 mm. In this subgroup application of load across the ankle reduced the medial and dorsal motion during the accompanying plantar flexion. The mechanism of these different movements can be deduced from the morphology of the ankle joint and its ligamentous and muscular guidance mechanism. The variable axis of joint movement and the insertion of the lateral ligament forced the fibula anterior in plantar flexion. When external talar rotation is present, the normal fibular motion is prevented unless load is applied across the ankle. This new investigative procedure permits study of the sequelae of traumatic and iatrogenic injuries to the fibula.

Female↗
PubMed1985

A systematic approach to the diagnosis of transethmoidal fractures in CT.

The experience of this study is based on about 50 Le Fort II and III fractures that have been visualised by CT. A systematic approach is offered to diagnose these fractures which may be summarised under the heading of transethmoidal fractures. This will enable the radiologist to establish a meaningful diagnosis of these lesions at an early stage when the severely traumatised patient undergoes his first cranial CT. It needs only little extra time, but the patient is saved additional investigations requiring a specialist's attention, time, transportation, and changes in position that may, at times, be hazardous.

Ethmoid Bone↗
PubMed1985

[Origin of olfactory and rhinosensory evoked cortical potentials in diseases of the central nervous system].

This is the first report to be published on olfactory evoked potentials in patients with well-defined lesions of the central nervous system and the trigeminal nerve. Absence of olfactory evoked potentials is seen in post-central and parietotemporal lesions. The first peak of the so-called olfactory evoked twin potential is absent in lesions of the basal nuclei and sectioning of the trigeminal or ophthalmic nerve, whereas there is no second peak in subcortico-frontal and cortico-temporal lesions. Tumours of the corpus callosum and sectioning of the maxillary and mandibular nerves do not disturb the olfactory evoked potentials. The anatomically different localisation and the functional synergism of the olfactory and trigeminal systems in the perception of odours and the processing of olfactory evoked potentials are pointed out.

Adolescent↗
PubMed1984

Sphenotemporal buttress fracture. A report of five cases.

A new fracture type visible on CT images of the base of the skull is described. In this fracture the sphenoidal connection to the zygomatic and temporal bone breaks off all its three extensions. It was recognized in five patients with severe head injuries. In three surviving patients it was associated with ipsilateral persistent amaurosis. This fracture should alert the investigator to the possible sequelae of the head injury.

Adult↗
PubMed1984

Spinal fractures: results and experience with computer tomography.

Our results and experience with computer tomography (CT) were analyzed with respect to 41 patients with fresh bone injuries in both the cervicothoracic and the lumbar region of the vertebral column. Besides differentiated representation of the involvement of various parts of the vertebral body, the arch, transverse and spinous processes in 46 fractures, and four luxation fractures, bone fragments were found in the spinal cavity in 12 patients. Two patients displayed spinal bleeding and 3 showed a traumatic vertebral disc protrusion; 5 patients had paravertebral hematomas. Comparison of the CT-verified computer-tomographic fractures with the results of conventional X-ray diagnosis in two planes, as well as partial a.p. or lateral tomography (n = 12), revealed that in 13 patients even the detection of the fracture remained uncertain. Post-traumatic CT investigation (n = 9) showed syringomyelia in 3 patients, dense necrosis in 1 patient, and spinal channel stenoses as well as radicular irritations which could be explained by overshoot bone neogenesis at the intervertebral foramina. New technological developments in CT instruments of the most recent generation (digital radiography, sagittal and coronary image reconstruction) have made CT the most effective method in the diagnosis of spinal trauma. This necessitates a reorientation in the diagnostic procedure in patients with traumatic lesions of the spine.

Adolescent↗
PubMed1984

Frontometaphyseal dysplasia: symptoms and possible mode of inheritance.

Frontometaphyseal dysplasia is a rare syndrome of which only 20 cases have been described thus far. In this paper we report a 46-year-old man who showed a medium degree of manifestation of the disorder. The variable expressivity in both sexes, as derived from the careful study of reported symptoms in all known cases, was discussed. On the basis of the published pedigrees and additional information from our case, the possible mode of inheritance was debated.

Bone Diseases, Developmental↗
PubMed1984

[Angiography of the upper abdomen using DSA. An alternative to conventional arteriography?].

DSA is not suitable for the investigation of hepatic and splanchnic vessels by intravenous or non-selective arterial injections. On the other hand, its use in selective arterial injection offers many advantages compared with conventional arteriography. It can be particularly recommended for routine use in the pre-operative diagnosis of abdominal masses. In some cases additional conventional angiography may also be required and it is therefore desirable to perform both examinations at one unit in order to profit from the advantages of each technique.

Angiography↗
PubMed1984

[Computed tomography of basal skull fractures].

In 241 patients examined for trauma of the skull by computed tomography, 36 fractures of the skull base were diagnosed, in addition to their intracranial lesions. Computed tomography demonstrated twice as many fractures as conventional radiography. Amongst surviving patients, 30% showed abnormalities which were directly related to fractures of the skull base. The type, complications and therapeutic consequences of skull base fractures are discussed. These observations show that the bony injury needs to be carefully considered in order to avoid extensive and time-consuming investigations which might otherwise become necessary later.

Child, Preschool↗
PubMed1984

[Comparative studies on imaging artificial bone lesions--conventional tomography and computed tomography].

Conventional tomography (T) and computer tomography (CT) were used for examining 97 artificial bone lesions at various sites. The purpose of the study was to determine how far CT can replace T in the diagnosis of skeletal abnormalities. The results have shown that modern CT, particularly in its high resolution form, equals T and provides additional information (substrate of a lesion, its relationship to neighbouring tissues, simultaneous demonstration of soft tissues etc.). These cannot be shown successfully by T. It follows that CT is indicated as the primary method of examination for lesions of the facial skeleton, skull base, spine, pelvis and, to some extent, extremities.

Animals↗