blood test to test the viscosity of the blood

A lab report may not reveal what type of test was done.

Cons: May be more expensive, require additional equipment, and take longer.

Pros: Conclusively identifies a substance, smaller risk of false positives.

May be one or a combination of procedures.

Conclusively identify the identity of a biological material.

Uses: Provide initial information to determine what test to perform next, used in combination with confirmatory tests.

Cons: Risk of false positives and may be overly sensitive.Pros: Narrows possibilities, can be used on larger areas, can locate possible evidence not visible to naked eye, relatively inexpensive and quick to perform.Do not conclusively prove the presence of a specific substance.Establish the possibility that a specific bodily fluid is present.Also known as preliminary tests, screening tests or field tests.Therefore, a meaningful blood viscosity test requires more than one measurement: systolic blood viscosity (high shear rate), which is affected by hematocrit, and plasma viscosity and diastolic viscosity (low shear rate), which is affected by several factors like stickiness of platelets, immune complexes that increase the aggregation of RBCs, triglycerides, cholesterol, and many more.When evaluating forensic tests on suspected blood, semen, or saliva evidence (also known as serology evidence), it is important for defenders to understand first the difference between presumptive and confirmatory tests and why that distinction is so important: Presumptive Tests The blood viscosity rises and falls from one extreme to the other with every cardiac cycle, comparable to blood pressure. Its viscosity changes with the applied shear stress. While serum or plasma viscosity measurements play an important role in the clinical management of patients prone to hyper-viscosity syndrome, these tests do not account for hematocrit, blood cell deformability or factors increasing RBC (red blood cell) aggregation. Elevated blood viscosity is a strong independent predictor of cardiovascular events. Blood viscosity is correlated with all known risk factors for cardiovascular diseases. It determines how much friction the blood causes against the vessels, how hard the heart has to work to pump the blood through the body, and how much oxygen is delivered to organs and tissue. The viscosity of blood is a direct measure of the ability of blood to flow through arteries and veins.

Blood test to test the viscosity of the blood