A prosthetic triplet is generally a three-piece penile prosthesis that includes a fluid capsule, cylinder and fluid pump valve. It is often used as one of the treatment options for men with erectile dysfunction, for those for whom non-surgical treatment is ineffective, and for those with erectile dysfunction caused by organic lesions of the rectum, prostate, bladder and secondary cavernous fibrosis. The clinical implantation success rate is high and it is a more mature implantable prosthesis. The implantation of the prosthesis usually brings the penis closer in appearance to the physiologically weak and erect state and is concealed. The role of the cylinder is to support the erection of the penis and is often placed in the cavernous cavity. The fluid capsule is placed in the space between the posterior pubic symphysis and the bladder, which is filled with sterile saline and serves as a source of fluid to fill the cylinder. A fluid pump valve is placed in the scrotum, and the patient can self-regulate the erectile state of the penis. Patients usually begin to try the distension test and learn how to use it about 2 weeks after surgery. Normal sexual life can be gradually resumed about 2 months after surgery. For patients who have successful surgery, the feedback from themselves and their partners is high in satisfaction. However, not all men are suitable for this procedure. Men with serious psychological and couple problems may suffer from serious psychological fluctuations after surgery. In addition, post-operative complications such as infection, penile swelling and pain, hematoma, prosthesis prolapse, and spontaneous swelling may occur, with an overall incidence of about 5%.