It is common to use SCD's--sequencial compression devices--during tummy tuck surgery to try to maintain normal-like blood flow in the leg veins. During general anesthesia, that flow which is somewhat dependent upon muscle contractions, is rather diminished.
The goal is to minimize the chances of blood clots which could break off the leg veins and travel through the heart to the lungs causing serious medical problems.
Further protection in selected patients can be attained with blood thinners. Some surgeons use them in all TT patients. Most use them selectively in higher risk patients using what is called a "Caprini score." You can google this term for more info, and also discuss this with your surgeon. These medicines carry a risk of bleeding which must be balanced against the benefits of less clotting in the leg veins.
Thanks for your question, best wishes.
Thanks, and best wishes.