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Biomedical subjects

P Keros

Publications and source records attributed to P Keros.

At least 19 recordsLinked to original sources
PubMed1996

The biomechanical aspect of testis hydrocele.

The liquid content of the hydrocele or watery hernia presses blood vessels of the testis. This pressure occurs in the accordance with hydrostatic and hydraulic laws. However, none of 223. 568 studies on the pressure in mammalian organisms registered worldwide has reported on the pressure values in case of testis hydrocele. Results obtained by observation of 20 patient with testis hydrocele suggested that the hydrostatic pressure of testis hydrocele always surpassed the pressure of blood vessels within the scrotum, proving that the pressure of a fluid as a mechanical factor plays an important role in the malfunction of spermatogenesis as well as in hypoxemic hypoxia of the testis.

Adult↗
PubMed1996

Biomechanical aspect of supravesical urine derivation by Bricker's method.

The findings obtained by excretory urography in 15 patients of various age and occupation confirmed the study premise that in the upright position after the procedure of supravesical urine derivation as described by Bricker, the isolated segment of the ileum does not function as a conduit but forms a siphon-like receptaculum which, according to the laws of liquid mechanics, prevents or reduces the ascent of gases and bacteria into the upper urinary ducts. This also appears to be a logical explanation for a decreased incidence of infection of proximal urinary ducts in Bricker's method of supravesical urine derivation as compared to other mechanically comparable surgical procedures.

Aged↗
PubMed1995

A biomechanical aspect of the lumbal approach to the kidney.

Functional differences between surgically attacked musculature of the lumbal region and intact musculature of the contralateral side were assessed in 71 patients by the method of Multić-Labar, Moire topography, electromyography and X-ray analysis of the thoraco-lumbar spine. The following conclusions were derived from the results obtained. In the intact musculature of the lumbal segment of the spine, sliding forces reached 200 kN in males an 170 kN in females aged >25 and <30 years. In younger and older age groups, the values were lower, assuming a form of the ascending and descending limb of a parabole, respectively. Upon healing, the lumbal musculature damaged by surgical resection showed decreased values of the pulling and sliding forces by 15 and 25 kN on an average, respectively, as definite values independent of age and sex. Kinematic alterations included myogenic geneses of a stationary form, with normal innervation, involving the whole damaged musculature. Summa summarum, results of analyses suggested the values of kinematic forces of pulling and sliding forces of the musculature damaged by surgical resection to be definitely significantly reduced, thus confirming the premise of the study.

Adolescent↗
PubMed1993

The biomechanics of the kidney: the isothermal function of the capsule adipose renis.

The paper describes the research in the field of thermodynamics. It deals with the function of capsule adipose renis. This homogenous tissue of low temperature acts as an independent thermal conductor. In fact, by encapsulating the kidney, it acts as a vacuum-flask, providing insulation for the kidney from two surrounding thermal areas, the warmer being on the interperitoneum and the cooler on the skin surface.

Adipose Tissue↗
PubMed1983

[Modern principles of surgical treatment of benign diseases of Vater's papilla].

Dilemma and contrary opinions about the appropriateness of surgical treatment of benign disease of choledocho-duodenal junction have often appeared in medical references, especially in recent decades. Existence or absence of functional and organic pathologic changes in the papilla Vateri and sphincter of Oddi have been the subject, facing the contrary opinions at many professional meetings considering the possibility of surgical treatment of disorders in flowing the gall to choledocho-duodenal junction. Having analysed their own patients surgically treated owing to gall hold up on papilla Vateri, the authors would like to contribute in clearing this problem. The patients should regularly be checked up in the postoperative period and the correct passage through the papilla of Vater following the surgery should be achieved. Operative technique improvements, decreasing the number of early postoperative complications, have been described. The authors confirm that operative indications for surgical treatment in the case of disorders of gall flowing on papilla Vateri is still set too seldom, so that instead of sphincteroplasty, a bilio--digestive anastomosis are carried out too often. The advantage of sphincteroplasty over sphincterotomy has been proved by objective diagnostic and functional examinations.

Ampulla of Vater↗
PubMed1980

Holographic investigations of the human tibiofibular interosseous membrane.

The interosseous membrane contributes to the function of the fibula by neutralizing the freedom of movement in the upper tibiofibular joint and by keeping the fibula from being passive. The main role of the membrane is indicated by its shearing capacity. As a result of dislocation and bending of the tibia (during axial loading), and the passivity of the fibula, the membrane slides in the direction of the leg's axis causing the zone of maximal shearing in its upper central part. This is the principal zone of strain and divides the upper portion of the membrane into the tibial and fibular area. Damage of the upper part of the membrane, perpendicular to the main fiber bundles, causes an irregular deformation of the talus, while complete damage of the membrane unburdens the fibula in load transference by more than 30%. The interosseous membrane is important in the normal function of the lower leg by maintaining the axis of balanced loading of the foot.

Biomechanical Phenomena↗