1.
To start the blood typing procedure, click on one of the patients.

2.
Move the cursor across the test tubes under "blood typing kit" to take a closer look at their contents.

3.
To get the patient's blood, take the syringe by using the mouse and drop it on the patient's arm. The syringe will now be filled with blood.

5.
The blood will react with the different antibodies in the tubes according to the patient's blood type. The blood can react with the antibody in the tube by clotting, or it will remain the same.

7.
To start all over again, click on "reset tubes". Do the same procedure if you want to take a look at the contents in the tubes before you drop the blood into them.

8.
If the blood in the A-test tube clots, you can be sure that the patient's red blood cells have A-antigens on its surface. If the blood clots in the B-test tube, the blood has B-antigens. If the blood clots in the Rh-test tube, the blood has Rh-antigens.

9.
Move the cursor across the blood bags to the left to take a look at what the different blood groups consist of. The blood bags reveal the kind of antigens found in a particular blood type.

Or read the "Introduction" (you can reach it from the game's start page).

10.
Give the patient blood transfusion by taking one of the blood bags with the cursor. Move the bag to the top of the blood bag rack.

11.
When the patient has received enough blood, take care of the next patient by clicking on the "next patient" sign in the speech bubble.

12.
When all three patients have received their blood transfusions, click on the "party sign" in the speech bubble for evaluation.