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The test was once part of the World Health Organization (WHO) algorithm for diagnosis of dengue fever, [3] however it is no longer used in the latest WHO guidance. [4] Studies have shown that the tourniquet test has low predictive value for dengue fever and should be used in conjunction with other tests for a reliable diagnosis. [5] [6] [7] [8]
The Hess test or Rumpel-Leede test is a medical test used to assess capillary fragility. [1] It is also called the Tourniquet test . To perform the test, pressure is applied to the forearm with a blood pressure cuff inflated to between systolic and diastolic blood pressure for 10 minutes.
An elastic tourniquet used to temporarily restrict blood flow. The tourniquet distends the veins, making them more palpable and visible. There are many ways in which blood can be drawn from a vein, and the method used depends on the person's age, the equipment available, and the type of tests required.
The Trendelenburg Test or Brodie–Trendelenburg test is a test which can be carried out as part of a physical examination to determine the competency of the valves in the superficial and deep veins of the legs in patients with varicose veins.
Shorter procedure times (for up to 2 hours) are preferred when IVRA is applied on the distal limb, especially on the forearm, except when the patient has contraindications to tourniquet use (such as in sickle cell anemia, where there is a risk of massive hemolysis due to low oxygen tension or hemolytic crisis due to restricted blood flow).
Another method of achieving constriction of the supplying artery is a tourniquet - a band tied tightly around a limb to restrict blood flow. Tourniquets are routinely used to bring veins to the surface for cannulation, though their use in emergency medicine is more limited. Many armies carry a tourniquet as part of their personal first aid kit.
Before the procedure, oedematous leg, if any, should be elevated overnight to reduce the oedema. The subject is tilted 40 degrees with head higher than the legs, in order to delay the flow of contrast medium from the foot to the thigh. Tourniquet is applied over the ankle to occlude the superficial veins of the leg.
Tourniquet being applied to an arm on a training dummy A combat tourniquet commonly used by combat medics (military environment) and EMS (civilian environment).. A tourniquet is a device that is used to apply pressure to a limb or extremity in order to create ischemia or stopping the flow of blood.