What does a positive tourniquet test indicate?
What does a positive tourniquet test indicate?
This test is performed by inflating a blood pressure cuff on the upper arm to midway between diastolic and systolic blood pressures for 5 minutes. The results are considered to be positive if more than 20 petechiae per square inch are observed on the skin in the area that was under pressure.
How do you test a positive tourniquet?
How to do a Tourniquet Test
- Take the patient’s blood pressure and record it, for example, 100/70.
- Inflate the cuff to a point midway between SBP and DBP and maintain for minutes. (
- Reduce and wait 2 minutes.
- Count petechiae below antecubital fossa.
- A positive test is 10 or more petechiae per 1 square inch.
When do you use a tourniquet test?
The test is considered positive when there are 20 or more petechiae per square inch (6.25 cm(2)) on the forearm, and is one of several clinical parameters considered by the World Health Organization to be important in the diagnosis of dengue fever.
Is tourniquet test accurate?
Receiver-operator characteristics demonstrated a test accuracy (AUC) of 0.70 (95% CI, 0.66-0.74). Conclusion: The tourniquet test is widely used in resource poor settings despite currently available evidence demonstrating only a marginal benefit in making a diagnosis of dengue infection alone.
What is DSS in dengue?
Dengue Shock Syndrome (DSS) is the final stage of the more severe occurrence of dengue – Dengue Haemorrhagic Fever (DHF), and is fatal without prompt treatment. DHF is a severe form of dengue which affects blood and lymph vessels, and if untreated can lead to a failure of the circulatory system.
What is the confirmatory test for dengue?
Nucleic acid amplification tests (NAATs) Presence of virus by rRT-PCR or NS1 antigen in a single diagnostic specimen is considered laboratory confirmation of dengue in patients with a compatible clinical and travel history.
How is dengue fever diagnosed?
Diagnosing Dengue Fever Doctors can diagnose dengue infection with a blood test to check for the virus or antibodies to it. If you become sick after traveling to a tropical area, let your doctor know. This will allow your doctor to evaluate the possibility that your symptoms were caused by a dengue infection.
What is the use of a tourniquet test?
tourniquet test. A test used to determine pain thresholds or, alternately, capillary fragility. A blood pressure cuff is inflated sufficiently to occlude venous return. It is kept in place for a set time.
What is a hepatic function panel test?
What It Is. The hepatic function panel, also known as liver function tests, is a group of seven tests used to evaluate the liver for injury, infection, or inflammation. The liver plays important roles: It stores energy from food, makes proteins, and helps remove toxins. The liver also makes bile, a fluid that helps in digestion.
How accurate is the tourniquet test for diagnosis of dengue infection?
The tourniquet test was considered positive when 20 or more petechiae were observed in the 2.5 cm square. A total of 160 cases were enrolled to determine the diagnostic accuracy of tourniquet test for diagnosis of dengue infection.
How do you interpret liver function test results?
Interpreting Results. Your liver function test results will reflect levels of the different enzymes and proteins that your doctor specifically ordered be checked. The individual test results are typically used together, not individually, to diagnose a liver problem. For example, if one number is mildly elevated, it likely won’t cause concern.
