HIT OPG Plate Opaque Gel Serotonin Release Assay

Interpret HIT functional assay (serotonin release assay or heparin-induced platelet activation) results in context of 4T pretest probability.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to Use

Enter the values for the scenario you are assessing. Interpret HIT functional assay (serotonin release assay or heparin-induced platelet activation) results in context of 4T pretest probability. Use the hit opg assay result to inform your calculation.

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Frequently Asked Questions