Patients who want to have an amputated limb reimplanted need to do so within an effective time frame, in addition to many other factors that affect the success of the reimplantation of an amputated finger. So what are the main factors that affect the success of finger transplantation? Factors that affect the survival of amputated finger implantation: 1, the way and degree of limb injury Common limb injuries are machine crushing injuries, wheel crushing injuries and sharp cutting injuries. Among them, the knife cut injury is the easiest to revitalize, and the limb function is also the easiest to recover. If it is crushed by the wheel, the neurovascular damage is heavier, the degree of contamination is also heavier, replanting is relatively difficult. 2, time and temperature This determines the reproductive cycle of bacteria in the injury wound, as well as the cell survival time in the ischemic state of the free limb. The higher the temperature, the faster the bacterial reproduction, the shorter the cell survival time, the less likely to be able to plant alive. The effective time for reimplantation of an amputated finger at room temperature is within 6 to 8 hours. However, if proper measures are taken, such as lowering the temperature, it can be extended for a considerable period of time, buying a chance for reimplantation surgery. This can be easily done by wrapping the severed finger in a plastic bag and placing it in a container of ice water. On the one hand, lowering the temperature can reduce the metabolism of the amputated finger, prolonging the time of cell survival; on the other hand, it can inhibit bacterial reproduction, so that it is in a relatively clean state, which can greatly extend the time of the amputation of the finger can be planted, and in some cases can even exceed 20 hours. Measures to improve the survival rate of limb survival is closely related to the prognosis and on-site first aid, if you can grasp the relevant knowledge, will be able to create conditions for follow-up treatment. 1, the most reliable ligature hemostasis Cut open the injured person’s clothes, expose the wound. The wound should be kept as clean as possible, covered with loose, clean cotton fabrics, compression wrapping can be. Never use incense (grass) ash, rotten mud, herbal paste paste, etc. to smear the wound. On the surface, these things seem to stop the oozing of blood, but in fact, they bring difficulties to the subsequent treatment. For one thing, most of these smears carry a wide variety of bacteria, which can increase the infection of the wound. In addition, these ashes, muds and creams are often embedded under the skin, between the flesh and inside the bone, making it difficult to clean the wound. Wounds bleeding more, should be ligated to stop bleeding, can be in the proximal end of the wound with a towel or rubber bandage limb (injury in the hand, in the forearm ligature; injury in the forearm, in the upper arm ligature; injury in the foot, in the calf ligature; injury in the calf, in the thigh ligature), in order to reduce bleeding. Taping time should not be too long (up to 90 minutes), and then loosened for 15 minutes, and then tightened, so that the distal end of the limb has a blood supply, to avoid ischemic necrosis. 2, don’t throw away the disembodied tissues Carefully check the accident scene, will fall off the skin, bone pieces and free fingers, toes to be wrapped up, along with the injured sent to the hospital. So as not to bring great difficulties to the repair and reconstruction work, or even leave a disability, which is really a pity. No one wants to have an accident, however, once the unfortunate happens, then, know how to first aid, in order to give yourself another chance. After the surgery, the soft tissue recovery is faster, at most it takes about three months; followed by the finger bone, usually the broken finger bone will grow in about two months after the surgery, but the full recovery will take about half a year or so. It should be emphasized that nerve recovery is slower and usually takes six months to a year. Therefore, it will take about a year for the whole finger to move freely.