https://thepowerofozone.com/ozone-high-dose-10-pass/

Ten-pass ozone therapy resembles a treatment called Major Autohemotherapy (MAH), with some important differences. In both MAH and 10-pass ozone, blood is drawn from the patient and mixed with ozone, which has the effect of killing microbes and cleansing the blood. The blood is then reinserted back into the patient.

One type of MAH, called Hyperbaric MAH, involves filling up a bottle with 200-220 ml of the patient’s blood, and then creating hyperbaric-like pressure inside of the bottle. Then, ozone is added and the mixture of blood and ozone are vigorously shaken to increase ozone (or oxygen, since ozone becomes oxygen in the body)– absorption into the cells.  The hyperbaric pressure protects the red blood cells from damage during the process.

One 10-pass treatment is about the equivalent of ten hyperbaric MAH treatments, but is different from MAH in that it uses higher concentrations of ozone. The blood draw-infusion process is done ten times; hence the term "10 pass” and takes 1-2 hours. The amount of ozone supplied to the body is about 140,000 ug, and heparin is given to the patient to keep the blood from coagulating. By comparison, a hyperbaric Major Autohemotherapy (MAH) provides about 6,000 ug of ozone, and a regular ozone IV only 3,000 ug of ozone. This means that ten-pass ozone supplies nearly 50 times the amount of ozone of a regular intravenous ozone treatment.