Tranexamic Acid for severe endometriosis surgery

Tranexamic acid is a medication that can help reduce bleeding by stopping the breakdown of blood clots. It has been shown to reduce bleeding from many types of surgeries (such as heart, knee, hip, trauma and some gynaecological surgeries). When it has been used to reduce bleeding in surgery, tranexamic acid has not caused an increase in bad outcomes (adverse events). No one has yet done a study to see if tranexamic acid also helps to reduce bleeding in keyhole surgery for severe endometriosis. If less bleeding occurs using tranexamic acid during these surgeries it may also help to make operations shorter and less likely to have complications. We predict that tranexamic acid will reduce blood loss in keyhole surgery for severe endometriosis. This study is a randomized controlled research project where we randomly put people who are going to have endometriosis surgery into two groups. One group will get the treatment (tranexamic acid) during the surgery and the other group will get a placebo (a medication with no active ingredients). This is a double-blinded study which means both the participants and their doctors do not know which treatment the participants are receiving. We will weigh the blood loss from the surgeries to compare between the two groups if the tranexamic acid does indeed reduce blood loss in this type of surgery. We will also see if there are other differences between the groups such as the time it takes to finish the surgery, the rates of complications and how long the participants need to stay in hospital.