Blood transfusions at the time were always unsanitary and unsafe. The knowledge doctors had usually was not enough to guarantee the surgery would be successful.
The war left many men with disabilities and deformities. With these deformities, it was hard to live a normal life. Surgery was performed to help, but like blood transfusions, they were almost always unsanitary and the medical staff often didn't have all the knowledge they needed. Even after several surgeries, the men were often still disfigured.
From the start to the end of the war, many soldiers were brought back with missing limbs or arms and legs that were severely infected or hurt and had no choice but to be amputated. artificial limbs were often given to soldiers to help with physical and emotional support. Artificial limbs were mostly made out of metal, wood, and/or plastic and were mainly legs and arms, but sometimes hands and feet. The quality of the faux limbs did not improve completely until 1918 when the government conferment continuation of false limb research.