It based upon peptide bonds
The blood levels should check for the acetylsalicylic acid because aspirin is a blood thinner. I know because I take only a baby aspirin for a condition I have and I still bleed easily.
Answer:
If the person is sitting or standing, then get yourself behind the person and reach your arms around his or her waist.
Place your fist, thumb side in, just above the belly button, then, Grasp the fist tightly with your other hand .Make quick, upward and inward thrusts with your fist….Perform between six and 10 abdominal thrusts until the blockage is dislodged..