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Arreflexia —complete ‘failure’ below lesion—eg, tetraplegia, paraplegia, overflow incontinence, paralytic ileus, gastric ddescerebracion and depression of cremasteric reflex; arreflexia is followed several wks later by. See also electrical stunning. Malformacion congenita occipito-atlanto-axial en un ternero.

Thought to cause anaphylactic shock due to the absorption of the colloids into the bloodstream. Clinical characteristics include initial chills and fever, warm flushed skin, increased cardiac output, and a lesser degree of hypotension than with hypovolemic shock; if therapy is ineffective, it may progress to the clinical picture associated with hypovolemic shock.

There may be residual signs due to direct damage when the shock passes. The treatment of hypovolemic shock requires replacement of the lost volume. It is marked by hypotension, coldness of the skin and tachycardia.

Level 2 – NEUROCIRUGIA – Memrise

This type may be caused by conditions that interfere with the function of the heart as a pump, such as severe myocardial infarction, severe heart failure, and certain disorders of rate and rhythm. La hipotermia puede llevar a diversas complicaciones, entre ellas aumento en el riesgo de infecciones, alteraciones electroliticas como hipocalemia, hipercalemia, aumento del tiempo de coagulacion, trombopenia, neutropenia, insuficiencia renal aguda, sepsis, disminucion del pulso, disminucion del gasto cardiaco, hipoventilacion, depresion del SNC, hiporreflexia o arreflexiabradicardia, fibrilacion auricular, edema agudo de pulmon, fibrilacion ventricular y hasta asistolia.


Certain organisms contain a toxin that seems to act on the blood vessels when it is released into the bloodstream. The sudden deaths that in rare cases follow bee stings or injection of certain medicines are due to anaphylactic reactions. Called also circulatory collapse.

The condition sometimes occurs as a result of increased intrathoracic pressure in patients who are being maintained on a mechanical ventilator. See also toxemic shock.

Shock, which is associated with a dangerously low blood pressure, can be produced by factors that attack the strength of the heart as a pump, decrease the volume of the blood in the system, or permit the blood vessels to increase in diameter. Mechanisms of Circulatory Shock. It is thought to result from the action of endotoxins or other products of the infectious agent on the vascular system causing large volumes of blood to be sequestered in the capillaries and veins; activation of the complement and kinin systems and the release of histamine, cytokines, prostaglandins, and other mediators may be involved.

Sendo exemplos de deficit ou perda funcional: Placing the head lower than the body is usually sufficient to relieve this form of shock. The loss of function is only temporary, usually for a few minutes but it may last for several hours.


It is marked by tremor, weakness, convulsions and collapse. Anaphylactic allergic shock and septic shock are both due to reactions that impair the muscular functioning of the blood vessels.

This is a common type that desceeebracion when blood or plasma is lost in such quantities that the remaining blood cannot fill the circulatory system despite constriction of the blood vessels. Neurogenic shock is due to disorders of the nervous system.

rigidez de decorticacion y descerebracion pdf

Relative hypovolemic shock refers to a situation in which the blood volume is normal but insufficient because of widespread vasodilation as in neurogenic shock or septic shock. Reporte de un caso. Hypovolemic low-volume shock occurs whenever there is insufficient blood to fill the circulatory system.


No obstante, se sabe que el SGB constituye un conjunto de sindromes que se manifiestan como diferentes subtipos de trastornos sindrome de Miller Fisher; debilidad faringo-cervico-braquial, diplejia facial con parestesias distales, ataxia grave con trastornos sensitivos y pandisautonomia agudacon rasgos electrofisiologicos y anatomopatologicos distintos; de este modo, es preferible definir el SGB como una polirradiculoneuropatia autoinmune, caracterizada clinicamente por la presencia de una paralisis flacida con arreflexiatrastorno sensorial variable y elevacion de las proteinas en el liquido cefalorraquideo LCR 3, 6.

Neuropsychological profile of an adult with Chorea-Acanthocytosis: Within a few minutes, the blood pressure falls and severe dyspnea develops. Arreflexia definition of Arreflexia by Medical dictionary https: Types of Circulatory Shock. The blood eventually pools within parts of the circulatory system that expand easily, causing the blood pressure to drop sharply. The pulmonary lesion is a nonspecific acute or subacute interstitial pneumonia.

Hipotermia terapeutica en la lesion traumatica cerebral. Hyperreflexia —exaggeration of reflexes with flexor spasms and autonomic dysreflexia, bladder distention, diaphoresis, HTN, and bradycardia; certain reflexes—eg, anal ‘wink’, bulbocavernosus and cremasteric reflexes, full penile erection, reflex leg withdrawal and Babinski sign, are retained after complete spinal cord transection since these reflexes don’t require higher levels of control. O quadro pode estar associado a epilepsia, amiotrofia, arreflexia generalizadas e elevacao de enzimas musculares Danek et al.

The period of shock may last from hours to months.