The MINUS system was developed as a minimally invasive procedure that uses a diaphyseal cephalic extramedullary implant for the treatment of transtrochanteral fractures of the femur in elderly patients. The implant consists of a sliding screw coupled to a plate adapted to the minimally invasive technique. The surgical access is approximately three centimeters in length located on the lateral surface of the hip, below the projection of the small trochanter. A perfectly adapted instrument was used for the procedure, which also requires the use of an image intensifier, reducing surgery time and rate of bleeding. The objective of this study is to present a new instrument and implant, developed specifically for treatment with the minimally invasive technique, reducing the length of the conventional surgical access from 10 to three centimetres. This new implant was given the commercial name of MINUS System.471113117Kuzyk, P.R., Guy, P., Kreder, H.J., Zdero, R., McKee, M.D., Schemitsch, E.H., Minimally invasive hip fracture surgery are outcomes better? (2009) J Orthop Trauma., 23 (6), pp. 447-453Janzing, H.M., Houben, B.J., Brandt, S.E., Chhoeurn, V., Lefever, S., Broos, P., The Gotfried PerCutaneous Compression Plate versus the Dynamic Hip Screw in the treatment of pertrochanteric hip fractures: Minimal invasive treatment reduces operative time and postoperative pain (2002) J Trauma., 52 (2), pp. 293-298Sawaia, R.N., Belangero, W.D., Estudo comparativo entre a técnica de miniincisão e a via de acesso a foco aberto para o tratamento das fraturas transtrocanterianas (2005) Rev Bras Ortop., 40 (3), pp. 106-118Lee, Y.S., Huang, H.L., Lo, T.Y., Huang, C.R., Dynamic hip screw in the treatment of intertrochanteric fractures: A comparison of two fixation methods (2007) Int Orthop., 31 (5), pp. 683-688Alobaid, A., Harvey, E.J., Elder, G.M., Lander, P., Guy, P., Reindl, R., Minimally invasive dynamic hip screw: Prospective randomized trial of two techniques of insertion of a standard dynamic fixation device (2004) J Orthop Trauma., 18 (4), pp. 207-212Chong, K.W., Wong, M.K., Rikhraj, I.S., Howe, T.S., The use of computer navigation in performing minimally invasive surgery for intertrochanteric hip fractures-The experience in Singapore (2006) Injury, 37 (8), pp. 755-762Baumgaertel, F., Placas em ponte (2002) Princípios AO Do Tratamento de Fratura, pp. 221-229. , Ruedi TP, Murphy W M. Porto Alegre: ArtMedRush, L.V., Dynamic intramedullary fracture-fixation of the femur. Reflections on the use of the round rod after 30 years (1968) Clin Orthop Relat Res., 60, pp. 21-27Bridle, S.H., Patel, A.D., Bircher, M., Calvert, P.T., Fixation of intertrochanteric fractures of the femur. A randomised prospective comparison of the gamma nail and the dynamic hip screw (1991) J Bone Joint Surg Br., 73 (2), pp. 330-334Goldman, L., Lee, T., Rudd, P., Ten commandments for effective consultations (1983) Arch Intern Med., 143 (9), pp. 1753-1755Curtis, M.J., Jinnah, R.H., Wilson, V., Cunningham, B.W., Proximal femoral fractures: A biomechanical study to compare intramedullary and extramedullary fixation (1994) Injury, 25 (2), pp. 99-104Muller, M.E., Allgower, M., Schneider, R., Willenegger, H., (1993) Manual de Osteossintese, pp. 270-276. , 3a. edição. São Paulo: ManoleAl-Yassari, G., Langstaff, R.J., Jones, J.W., Al-Lami, M., The AO/ASIF proximal femoral nail (PFN) for the treatment of unstable trochanteric femoral fracture (2002) Injury, 33 (5), pp. 395-399Park, S.R., Kang, J.S., Kim, H.S., Lee, W.H., Kim, Y.H., Treatment of intertrochanteric fracture with the Gamma AP locking nail or by a compression hip screw - A randomised prospective trial (1998) Int Orthop., 22 (3), pp. 157-160Bridle, S., Patel, A., Bircher, M., Calvert, P.T., Fixation of intertrochanteric fractures of the femur (1991) J Bone Joint Surg Br., 73 (2), pp. 330-334Sawaia, R.N., Belangero, W.D., The treatment of transtrochanteric fractures of the femur with a minimally invasive technique using an extramedullary implant MINUS System (2008) Int Orthop., 32 (2), pp. 159-165Zethraeus, N., Strömberg, L., Jönsson, B., Svensson, O., Ohlén, G., The cost of a hip fracture. Estimates for 1,709 patients in Sweden (1997) Acta Orthop Scand., 68 (1), pp. 13-17Johnell, O., The socioeconomic burden of fractures: Today and in the 21st century (1997) Am J Med., 103 (2 A), pp. 20S-25SRadford, P.J., Needoff, M., Webb, J.K., A prospective randomised comparison of the dynamic hip screw and the gamma locking nail (1993) J Bone Joint Surg Br., 75 (5), pp. 789-793Harrington, P., Nihal, A., Singhania, A.K., Howell, F.R., Intramedullary hip screw versus sliding hip screw for unstable intertrochanteric femoral fractures in the elderly (2002) Injury, 33 (1), pp. 23-28