Las maniobras de Ortolani y Barlow son 2 maniobras que se realizan en el neonato para diagnosticar la luxación congénita de cadera.

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In medicineAllen’s test or the Allen test is a medical sign used in physical examination of arterial blood flow to the hands.

It was named for Edgar Van Nuys Allenwho described the original version of the test in The alternative method is often referred to as the modified Allen’s test or modified Allen test.

The original test proposed by Allen is performed as follows: Allen’s test looks for trendelembjrg circulation.

If color returns quickly as described above, Allen’s test is considered to demonstrate normal circulation. If the pallor persists for some time after the patient opens their fingers, this suggests a degree of occlusion of the uncompressed artery.

Prueba de Trendelenburg

In the modified Allen test, one hand is examined at a time: If color returns as described, Allen’s test is considered to be normal. If color fails to return, the test is considered abnormal and it suggests that the ulnar artery supply to the hand is not sufficient. The hand is normally supplied by blood from both the ulnar and radial arteries.


The arteries join in the hand.

Thus, if the blood supply from one of the arteries is cut off, the other artery can supply adequate blood to the hand. A minority of people lack this dual blood supply. Those people who lack the dual supply are at much greater risk of ischemia.

Allen’s test

The risk can be reduced by performing the modified Allen’s test beforehand. People who have a single blood supply in one hand often have a dual supply in the other, allowing the practitioner to take blood from the side with dual supply. The modified Allen’s test is also performed prior to heart bypass surgery. The radial artery is occasionally used as a conduit for bypass surgery, and its patency lasts longer in comparison to the saphenous veins.

Prior to heart bypass surgery, the test is performed to assess the suitability of the radial artery to be used as a conduit.

A result of less than 3 seconds is considered as good and suitable. A result of between 3—5 seconds is equivocal, whereas the radial artery will not be considered for grafting if the result is longer than 5 seconds. The utility of the modified Allen’s test is questionable, [3] and no direct correlation with reduced ischemic complications of radial artery cannulation have ever been proven.


Prueba de Trendelenburg

Further modifications to the test have been proposed to improve reliability. From Wikipedia, the free encyclopedia.

Am J Med Sci. J Hand Surg BR. Int J Clin Monit Comput. Eponymous medical signs for circulatory system. Benign paediatric heart murmur Still’s murmur Diastolic heart murmur: Beck’s triad Ewart’s sign.

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Heart murmur Systolic heart murmur: Arterial aortic aneurysm Cardarelli’s signOliver’s sign pulmonary embolism McConnell’s sign radial ve sufficiency Allen’s test pseudohypertension Osler’s sign thrombus Lines of Zahn Adson’s sign arteriovenous fistula Nicoladoni sign.