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Biomedical subjects

P Engel

Publications and source records attributed to P Engel.

At least 109 records · Page 6Linked to original sources
PubMed1981

[One case of atypical craniopharyngioma located in sphenoïdal body and operated first by nasal then by maxillary sinus route (author's transl)].

This case of retro-pharyngeal craniopharyngioma was treated through an unusual combination of approaches first by naso septal then by the maxillary sinus route of Denker. This last exposure provided wide access and permitted a complete removal of this difficult tumor. It is usually meant for cancer of upper maxillary bone structures. In this indication, it is evidently followed by a very bad cosmetic result, but this did not happen with our patient.

Adolescent↗
PubMed1978

[Studies on thermoregulative performance of disabled persons with congenital maldevelopment of the limbs and acquired loss of limbs during defined physical work and passive heat load (author's transl)].

Comparative studies were conducted in 20 persons without hands (amputated a long time ago) and in fifteen juveniles (12--15 years) with dysemlia (phocomelia or ectromelia), tested in each case against groups of non-disabled persons of corresponding age. All persons under examination had to perform the same, graded treadmill work under thermoconstant condition (30 degrees C, 45% rel. humidity). These tests pointed towards the existence of a particularly economic mode of thermoregulation in persons with dysmelia obviously involving adaptive processes of energy metabolism as well, whereas such adaptation does not take place--not even in the course of many years--in disabled persons with acquired loss of limbs. The persons with congenital dysmelia showed lower temperatures of the interior of the body, less sweat loss, and on the average a lower uptake of oxygen than non-disabled persons of the same age, whereas higher temperatures of the interior of the body, greater sweat loss, and a higher oxygen uptake were measured in the persons whose arms had been amputated a long time ago (ie persons without hands). Under passive heat load (40 degrees C, 30 min.) the amputated persons showed a corresponding thermoregulative performance as during physical work, in comparison to the non-disabled persons.

Adaptation, Physiological↗
PubMed1977

Echocardiographic study of cardiac tamponade.

We studied 14 patients with cardiac tamponade and pulsus paradoxus; 11 were studied after relief of tamponade by pericardiocentesis. Right ventricle diastolic diameter increased during inspiration in each of 12 patients; left ventricle diastolic diameter decreased during inspiration in each of 13. Mitral valve DE amplitude decreased with inspiration in 13 of 14 patients. Mitral valve E-F slope could be measured in eight patients, and was rounded and not measurable in six. Six of the eight showed inspiratory decrease in mitral E-F slope. Similar changes were observed in two other patients with pulsus paradoxus who had chronic obstructive airway disease. Twenty patients with large pericardial effusions and no tamponade did not show these changes. These results suggest inspiratory augmentation of right ventricular filling and inspiratory diminution of left ventricular filling, not only in cardiac tamponade, but in obstructive airway disease associated with pulsus paradoxus.

Aortic Valve↗
PubMed1977

[Reactive-periodical variations of vegetative parameters following orthopedic operations (author's transl)].

Continuous examinations during 4-6 weeks following various orthopedic operations of circulatory, retinuous improvement of the factors examined. E.g. frequency of resting pulse showed periodic variations with, in parts, regressive tendencies. In individual cases the maxima and minima of these variations showed considerable differences, but had a peak of frequency at 6-7 days. Similar variations of stabilizations of circulation were seen in 7 amputees of the lower limb, at rest and when learning to walk. Such variations with mainly circaseptan periodicity are unspecific accompanying reactions as part of vegetative adaptation, as known elsewhere. Similar investigations on 15 patients, walking after replacement of the hip joint and before the operation, are reported on. During the first 3-5 postoperative weeks circulatory findings were much worse, but 2 years later the values at rest and when walking were much improved, because of better walking economy.

Amputation, Surgical↗
PubMed1976

Long-term studies about orthostatic training after high spinal cord injury.

Results of long-term observations of paraplegics with upper lesions are presented. The circulatory behaviour of patients, completely bedridden for several months, was observed during orthostatic tilt-table exercise over a period of at least 7 weeks. It is not possible to achieve a decisive circulatory stabilisation in paraplegics with upper lesions. For the most part, there was no improvement in the process of adaptation to varying orthostatic intensity. Much more marked are fluctuations in the ability to adapt to orthostasis, whereby the maximum circulatory lability may not occur until several weeks after the start of therapeutic repositioning to sitting. In practice, these observations point to the need for a sufficiently long period of orthostatic observation of these patients' circulatory system.

Blood Circulation↗
PubMed1976

[Work physiological studies performed to optimate the lever propulsion and the seat position of a lever propelled wheelchair (author's transl)].

Spiroergometric examination with defined work loads and permanent records of the common circulatory and metabolic values were carried out on a group of healthy adults and one wheelchair occupant, using a fixed wheelchair simulator with lever propulsion, which was connected to an ergometer. Comparative studies were performed in three different seat positions in relation to the lever, as well as six different lengths of the connecting rod. The best values were measured, under steadystate conditions, with increasing lengths of the connecting rod and posterior placement of the seat unit. The results are in agreement with the experience gained by other authors with respect to arm work, and show that the optimal efficiency of hand lever work is obtained in the anterior position. In this context it proved to be particularly advantageious from the ergonomic viewpoint, if, when bending forward, as necessitated by a long connecting rod, both the upper part of the body and the trunk musculature are employed. The practical consequences of the simulator tests on an adequate wheelchair design and wheelchair prescription are discussed.

Persons with Disabilities↗