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1.
J Med Life ; 4(4): 324-9, 2011 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-22514563

RESUMEN

Due to an ever-aging population and a growing prevalence of osteoporosis and motor vehicle accidents, the number of subtrochanteric fractures is increasing worldwide. The choice of the appropriate implant continues to be critical for fixation of unstable hip fractures. The subtrochanteric region has certain anatomical and biomechanical features that can make fractures in this region difficult to treat. The preferred type of device is a matter of debate. Increased understandings of biomechanical characteristics of the hip and improvement of the implant materials have reduced the incidence of complications. The surgeons choose between the two methods according to Seinsheimer's classification and also to their personal preferences. As a general principle, the open reduction and internal fixation were performed in stable fractures, and the closed reduction and internal fixation were performed in unstable fractures. The advantages of intramedullary nailing consist in a small skin incision, lower operating times, preservation of fracture hematoma and the possibility of early weight bearing. The disadvantages consist in a difficult closed reduction due to important muscular forces, although the nail can be used as a reduction instrument, and higher implant cost. In open reduction internal fixation techniques, the advantage is represented by anatomical reduction which, in our opinion, is not necessary. The disadvantages are represented by: higher operating time, demanding surgery, large devascularization, higher infection rates, late weight bearing, medial instability, refracture after plate removal and inesthetic approach.


Asunto(s)
Placas Óseas , Fracturas de Cadera/cirugía , Fijación Interna de Fracturas/métodos , Fijación Intramedular de Fracturas/métodos , Humanos
2.
Neurosci Lett ; 365(1): 6-9, 2004 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-15234462

RESUMEN

Carbon dioxide induces a rapid dilation of cerebral arterioles, enabling local blood flow to match increasing metabolic requirements of tissue. Amongst the vasodilatory substances released by cortical tissue in response to CO2 are adenosine and nitric oxide. Here we report that selective adenosine A(2A) receptor antagonists, applied topically using a rat cortical window technique, significantly depressed the CO2-evoked increase in arteriolar diameter, measured using video microscopy, as well as attenuating the CO2 and pH reactivity of the cortical arterioles. Two non-selective inhibitors of nitric oxide synthase also significantly depressed the hypercapnia-evoked increase in arteriolar diameter.


Asunto(s)
Adenosina/metabolismo , Circulación Cerebrovascular/fisiología , Hipercapnia/complicaciones , Vasodilatación/fisiología , Animales , Dióxido de Carbono/farmacología , Circulación Cerebrovascular/efectos de los fármacos , Masculino , Microscopía por Video , Óxido Nítrico/metabolismo , Antagonistas de Receptores Purinérgicos P1 , Ratas , Ratas Sprague-Dawley , Receptores Purinérgicos P1/metabolismo , Triazinas/farmacología , Triazoles/farmacología
3.
Artículo en Rumano | MEDLINE | ID: mdl-2534439

RESUMEN

The authors make an analysis of the concept of prevention as applied to the field of stomatology, and also discuss the prophylactic strategies, and the means for action. A series of aspects are discussed, including: the why of preventive practice? What is preventive practice? The philosophy of prevention; which are the facilities and the necessary equipment?


Asunto(s)
Odontología Preventiva , Profilaxis Dental , Humanos , Filosofía en Odontología
10.
Artículo en Rumano | MEDLINE | ID: mdl-6450973

RESUMEN

The authors present the result of their experimental studies with the tensiometric method performed on human renal basins with the tensiometric method, under different conditions of stress. The studies have been based on the principle of recording microdeformations of basins under determined amounts of stress, and they have demonstrated the proportionality between the stress and the deformation as being a direct one. The most stressed areas have been evidenced, when transversal and antero-posterior compression was applied, and the mechanism is explained, of the rupture of the basins in relation with the concentration of the tension that have developed in a predilect way in certain areas.


Asunto(s)
Huesos Pélvicos/anomalías , Pelvis/anomalías , Anomalías Congénitas/diagnóstico , Humanos , Resistencia a la Tracción
12.
Artículo en Rumano | MEDLINE | ID: mdl-580461

RESUMEN

The study is concerned with 11 cases of open supra-malleolar fractures involving both bones. The tibial fracture was of the comminutive type, with a large number of small fragments allowing an exteriorization of the proximal end or telescoping of the ends with consecutive loss of the axis. Due to a difficult synthesis of the tibial bone synthesis of the peroneum with a thick rod or with a brooch was performed, recovering the length of the lever and allowing to de-telescope the tibial focus, to recover the normal length and a corresponding axis. Since in all the treated cases consolidation was achieved over a duration of 5 months, the advantage is stressed, of the procedure which, solving indirectly the fracture, protects the tibial focus, already poorly irrigated and susceptible to pseudarthrosis in thi;s type of location.


Asunto(s)
Peroné/lesiones , Fijación Intramedular de Fracturas , Fracturas de la Tibia/cirugía , Fracturas Abiertas/cirugía , Humanos
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