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Biomedical subjects

H Schild

Publications and source records attributed to H Schild.

At least 271 records · Page 15Linked to original sources

[Traumatology of the knee joint--radiologic and accident surgery aspects--1].

Lesions of the knee joint are relatively frequent and are on the increase due to the increasing number of sports and traffic accidents. Violent force exercised on the knee can lead basically to two different kinds of injury sequels. As a rule, injuries to the bone do not present diagnostic problems if there is a clear break in continuity. On the other hand, it is often very difficult to detect chondral or osteochondral lesions and also certain types of longitudinal patellar fractures and fractures of the head of the tibia. Their visualisation requires more far-reaching diagnostic measures. Fundamentally more difficult to identify: the second group of lesions, namely, those of the internal structures of the knee, unless there is a marked instability which is usually accessible to clinical examination. Relatively slight osseous tears or ruptures of a ligament often remain unnoticed on the plain x-ray film. Other diagnostic techniques are imperative in such cases. The first part deals specifically with the radiological aspects of knee injuries. The majority of injuries close to the knee region can be visualized by making use of all techniques of roentgenology. However, if the examination methods get too costly and complicated without ensuring an absolutely safe diagnosis, other techniques must be employed. An example in this regard are the chondral or osteochondral lesions. It is here that arthroscopy often yields better results while offering at the same time a possibility to remove individual small fragments.

Fractures, Bone↗

[Traumatology of the knee joint--radiologic and accident surgery aspects--2].

The second part is devoted to the presentation of the accident surgery aspects of knee lesions. For every topographical region the anatomical features, the most frequent causes of fractures, as well as the conventional classification criteria, are described. In each case also the principal surgical methods are described. Lesions of tendons or ligaments have been included only insofar as they have occurred within the context of an osseous lesion.

Fracture Fixation, Internal↗

[Intraoperative ultrasound study in surgery].

Report on intraoperative sonography in 257 patients (89 with pancreatic and 67 with liver disease, 24 with vascular surgery and 24 with bile duct disease). Intraoperative sonography was helpful for the detection of tumors not evident by inspection and palpation. In vascular surgery it proved to be an excellent means for quality control. The main problems encountered concerned the evaluation of the bile ducts and of haemodynamically insignificant vessel wall lesions.

Bile Duct Diseases↗

[Diagnosis and course of synovial sarcoma. Comparison of x-ray diagnosis and bone scintigraphy].

The unfavourable prognosis of malignant synoviomas makes it essential to arrive at an early diagnosis. The early clinical symptoms and radiological appearances may be minimal and sometimes absent. It is therefore advisable to obtain bone scintigrams with perfusion and early images as well as the radiographs. The local extent of the tumour can be evaluated by ultrasound and CT. Angiography is required only if the relationship to the vessels cannot otherwise be ascertained, or if intra-arterial therapy is being considered. The final diagnosis depends on a biopsy. For subsequent observation, both scintigrams and radiographs should be obtained. It is essential to perform a three-phase scintigram. This improves the recognition of recurrences and of soft tissue or bone metastases. Most bone metastases are visible on scintigraphy, but a normal scintigram in the presence of an osteolytic lesion on a radiograph may be obtained. Pulmonary metastases can only be demonstrated radiologically.

Adolescent↗

[Selective blood sampling from the inferior petrosal sinus using digital subtraction angiography].

Simultaneous bilateral venous sampling of blood from the inferior petrosal sinuses helps in the differentiation between peripheral and central ACTH hypersecretion. One can also locate the site of a hormonally active hypophyseal micro-adenoma that cannot be demonstrated by other methods. The authors have experience with fifteen patients and discuss the indications, technique and problems as well as the advantages of using digital subtraction angiography.

Adenoma↗

[Computed tomography of lung contusion. An experimental study].

A new experimental model has been developed to determine whether computed tomography has any advantages for the investigation of lung contusions. In 27 dogs, chest wall deformation was produced at speeds varying from 17.3 m/sec to 45.7 m/sec, leading to lung contusion. After the injury, 27 out of 27 (100%) CT examinations demonstrated the contusions, but only nine out of 24 (37.5%) were seen on conventional radiographs. In contrast to conventional radiography, which either failed to show the presence of a contusion, or which under-estimated the extent by more than one cm, in more than half the cases CT agreed with the pathological findings in more than 90%. No lung contusions were found at autopsy which had not been demonstrated by CT.

Animals↗

[Varicose veins of the lung].

Varicosity of the pulmonary veins is a rare anomaly of the pulmonary vascular system. The varices do not usually change in size over years, do not cause symptoms and need no therapy. However, raised left atrial pressure can cause increase in the diameter of pulmonary vein varices. A case of lung vein varicosity in the right middle and upper lobe associated with coarctation of the aorta and an anomalous upper-middle lobe vein was observed over a period of 10 years. Increase in left atrial pressure (aortic and relative mitral regurgitation) led to enlargement of the pulmonary veins.

Female↗

[Calcinosis of the supraspinal ligament--a rare secondary finding].

The supraspinal ligament calcification of thoracic spine is a rare roentgenographic finding. If this calcificated ligament is fractured several times it may be possible to misinterpret it as rib serial fractures, if it is overshadowed by dorsal ribs in the side projection of thorax. According to Resnick (4) such a ligamentous calcification is found within the overall framework of the "DISH"-syndrome.

Aged↗

[Roentgenologic and nuclear medicine findings in alkaptonuric ochronosis].

In alkaptonuria, a recessively inherited disturbance of amino acid metabolism, deposits of oxydation products of homogentisinic acid result in the disease pattern of ochronosis. Due to the enhanced brittleness of the supporting and gliding tissue, ochronotic arthropathy develops at the vertebral column and later at the major joints with typical roentgenological changes especially in the intervertebral space and the intervertebral disk, as well as the adjacent vertebral bodies. The bone scintigram shows enhanced accumulation in the base and tectorial plates as well as in the adjacent sclerosing zones in the spongiosa of the affected vertebral bodies.

Aged↗

[Animal experiment results with a new vena cava filter].

A new cava filter has been tried in 23 dogs weighing between 16 and 23 kg. The filter consists of a stainless steel basket which can be introduced either antegrade or retrograde through a 10F teflon catheter and which can be removed again within the first four days. The filter was effective in holding back embolising thrombus. In the early stages, even without artificial embolisation, two out of five animals showed clot formation in the basket. After three or four months, all the filters were permeable and on only two occasions was a small amount of thrombus found.

Angioplasty, Balloon↗

Vena caval filter to prevent pulmonary embolism: experimental study. Work in progress.

A new inferior vena caval filter was tested in an experimental series of 23 dogs and in an in vitro study. The filter consists of a pliable basket and anchoring legs made of stainless steel. It can be inserted percutaneously in an antegrade or retrograde fashion through a 10-F Teflon catheter and can be retrieved with a snare or forceps. The filter is self-orienting in the inferior vena cava, becomes securely the inferior vena cava, becomes securely fixed to the wall, and has exhibited no tendency to migrate. It is highly effective in capturing small and large emboli. There was no significant elevation in upstream hydrostatic pressure following entrapment of emboli. Spontaneous thrombus formation within the basket was observed in two of six dogs who had short-term follow-up. In dogs who had long-term follow-up, the filter remained patent. Microscopically, the filter caused sclerosis of the intima where the wire was in contact with the vessel wall. Breakage of an anchor leg and separation at the fusion between anchor and basket were seen in the study. They were eliminated by improvement of the prototype, which is now ready for clinical application.

Animals↗

[Methodologic studies of manometry of the rectum].

For the purpose of an experimental study in which the three different types of pressure catheters most commonly used in anorectal manometry were compared, a Starling-resistance could be established. Under equal conditions the pressures could be changed in this resistance and the data obtained by using a membrane-catheter, an open-tip and an open-side-catheter were compared among one another and to the known ideal straight line. The open tip catheter measures the opening pressure and the recorded pressure does not necessarily reflect the pressure at the site of the tip hole. Because of its elastic and plastic characteristics, the membrane-catheter yielded the best results with prestretch of the membrane and with calibration before and after each study.

Anal Canal↗

[Significance of the esophagogram compared to computed tomography in esophageal cancer].

A comparison of the oesophagogram and computed tomography has shown that there is angulation of the axis of the oesophagus in 75% of patients with perioesophageal tumour spread. This angulation is more common due to tumour in the younger patient. Longer tumours tend to show deeper infiltration into the peri-oesophageal tissue, although its frequency is not necessarily increased. Tumours longer than 8 cm. show infiltration in about 80% of cases.

Esophageal Neoplasms↗

[Radiation load to the gonads in the sclerosing treatment of varicocele].

Vague notions concerning the radiation dose to the gonads during sclerosing treatment of varicoceles have lead to the unjust neglect of this form of therapy. Accurate measurements have shown that the dose is less than the dose to the female breast resulting from chest radiographs in two planes, if the treatment proceeds without complication. Although the dose is so low, an attempt has been made to evaluate the risk.

Humans↗

[Transabdominal CT-guided sympathectomy].

A new technique for lumbar sympathectomy is described. It consists of CT-guided trans-abdominal fine needle puncture and injection of alcohol. The technique is simple and well tolerated by the patient, and it permits accurate application of the alcohol. Complications have so far not been observed.

Aged↗