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      Bases anatómicas del colgajo anterolateral de muslo de flujo inverso Translated title: Anatomical basis of distally based anterolateral thigh flap

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          Abstract

          Resumen Introducción y objetivo. El colgajo anterolateral de muslo de base distal presenta una alternativa interesante para la reconstrucción de los defectos cutáneos de la rodilla. El motivo de este trabajo es el estudio anatómico de la arteria descendente de la circunfleja femoral lateral y su existencia o no de anastomosis distal, que nos permitirá la realización del colgajo basado distalmente. Material y método. Estudiamos diferentes ítems en 22 miembros inferiores formolizados: origen de la arteria, distancia desde la salida de la perforante de la arteria descendente hasta la piel, longitud y localización de la arteria descendente, anastomosis distal en el caso de que la hubiera, localización del punto pivote tomando como punto de referencia la esquina súpero-lateral de la patela y la suma de la longitud de la perforante, y la longitud de la arteria de la descendente que nos da la longitud del pedículo que podemos obtener al disecar el colgajo. Resultados. En relación con la anastomosis distal describimos 2 modelos. Modelo 1: no anastomosis, con una proporción del 45%; y modelo 2: anastomosis distal existente, con un 55%. En el modelo 2 establecemos a su vez 3 tipos de anastomosis: tipo 1, cuando la anastomosis se realiza con la arteria geniculada lateral superior, en un 42%; tipo 2, anastomosis con la arteria femoral profunda, en un 25%; y tipo 3, anastomosis con ambas, en un 33%. El punto pivote lo encontramos como media a 11 cm del borde superior de la patela. La longitud del pedículo presentó una media de 15 cm. Conclusiones. Nuestros resultados demuestran que el colgajo anterolateral de base distal es una adecuada alternativa para la cobertura de pérdidas de sustancia en la rodilla. Para emplearlo, debido a la diversidad anatómica, sería adecuado realizar una angiografía previa o una revisión intraoperatoria de la anastomosis distal.

          Translated abstract

          Abstract Background and objective. The distally based anterolateral thigh flap is an interesting alternative for the reconstruction of skin defects of the knee. The reason for this paper is the anatomical study of the descending artery of the lateral circumflex femoral and the existence or not of a distal anastomosis that allows us to perform the distally based flap. Methods. Different items were studied in 22 embalmed lower limbs: origin of the artery, distance from the outlet of the perforator of the descending artery to the skin, length and location of the descending artery, distal anastomosis if any, location of the pivot point taking as a reference point the supero-lateral corner of the patella, and the sum of the length of the perforator and the length of the descending artery, which gives us the length of the pedicle that we can obtain by dissecting the flap. Results. Related to the distal anastomosis, we described 2 models. Model 1: no anastomosis, with a ratio of 45%, and model 2: there is an anastomosis in 55%. In model 2 we have established 3 types of anastomosis: type 1, when the anastomosis is performed with the superior lateral geniculate artery, in 42%; type 2, anastomosis with the deep femoral artery, in 25%; and type 3, anastomosis with both, in 33%. The pivot point was found an average of 11 cm from the upper edge of the patella.The length of the pedicle had an average of 15 cm. Conclusions. Our results demonstrate that the distally based anterolateral flap is an adequate alternative for knee soft-tissue reconstruction. Due to the anatomical diversity, angiography or intraoperative revision of the distal anastomosis would be appropriate to perform this flap.

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          Most cited references26

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          The free thigh flap: a new free flap concept based on the septocutaneous artery.

          Based on the septocutaneous artery flap concept, the thigh, which is the commonest conventional donor site for split-skin grafts, can also become a donor area for skin flaps. The thigh flap, with its large and long neuro-vascular pedicle, can be used either as a free flap or as an island flap as an alternative to the lower abdominal flap, groin flap, tensor fasciae latae myocutaneous flap, sartorius myocutaneous flap or the gracilis myocutaneous flap. The anatomical basis, operative technique and characteristics of the thigh flap are discussed.
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            Free anterolateral thigh flaps for reconstruction of head and neck defects.

            The anterolateral thigh flap is a septocutaneous artery flap based on the septocutaneous or muscle perforators of the lateral circumflex femoral system. Little has been reported about the variations in its vascular anatomy and its application for head and neck reconstruction. We report 22 cases in which this flap was used for the reconstruction of head and neck defects. Based on our clinical and cadevaric experiences, the derivation of the vascular pedicle of this flap has four variations by which the septocutaneous perforators are derived from the descending branch of the lateral circumflex femoral system and/or from the transverse branch of that system, or for which there are no septocutaneous perforators but there are muscle perforators originating from the lateral circumflex femoral system. Clinically, the vascular variations and the locations of perforators of this system can be determined preoperatively with stereoangiograms or simple angiograms and Doppler audiometry. The anterolateral thigh fasciocutaneous flap is suitable for reconstruction of defects in an oral floor with tongue and esophageal deficits, scalp defects with dural defects, and for large full thickness defects of the lip. The advantages of this flap are safe elevation, a long and wide vascular pedicle, skin that is generally thin, and good pliability. Even if the skin is thick, a thinner flap can be created by sacrificing a large amount of fatty tissue. Furthermore, the skin territory is very wide and long. The donor defect can often be closed directly with its scar being less noticeable. The disadvantage of this flap is that the anatomy of the pedicle vessels has irregular derivation from the main vessels. This can be overcome, however, by employing preoperative stereoangiograms.
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              Distally based anterolateral thigh flap: an anatomic and clinical study.

              The distally based anterolateral thigh flap has been used for coverage of soft-tissue defects of the knee and upper third of the leg. This flap is based on the septocutaneous or musculocutaneous perforators derived from the lateral circumflex femoral system. The purpose of this study was to examine the results of anatomical variations of the descending branch of the lateral circumflex femoral artery and the retrograde blood pressure of the descending branch of the lateral circumflex femoral artery so that the surgical technique for raising and transferring a distally based anterolateral thigh flap to the knee region could be improved. The authors have actually used this flap in three cases. In 11 thighs of six cadavers, the descending branch of the lateral circumflex femoral artery had a rather consistent connection with the lateral superior genicular artery or profunda femoral artery in the knee region. The pivot point, located at the distal portion of the vastus lateralis muscle, ranges from 3 to 10 cm above the knee. In their three cases, the maximal flap size was 7.0 x 16.0 cm and was harvested safely, without marginal necrosis. The mean pedicle length was 15.2 +/- 0.7 cm (range, 14.5 to 16 cm). The average proximal and distal retrograde blood pressure of the descending branch of the lateral circumflex femoral artery was also studied in another 11 patients, and the anterolateral thigh flap being used for reconstruction of head and neck defects showed 58.3 and 77.7 percent of proximal antegrade blood pressure, respectively. The advantages of this flap include a long pedicle length, a sufficient tissue supply, possible combination with fascia lata for tendon reconstruction, and favorable donor-site selection, without sacrifice of major vessels or muscles.
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                Author and article information

                Journal
                cpil
                Cirugía Plástica Ibero-Latinoamericana
                Cir. plást. iberolatinoam.
                Sociedad Española de Cirugía Plástica, Reparadora y Estética (SECPRE) (Madrid, Madrid, Spain )
                0376-7892
                1989-2055
                June 2021
                : 47
                : 2
                : 179-186
                Affiliations
                [1] Burgos orgnameHospital Universitario de Burgos orgdiv1Servicio de Cirugía Plástica y Reparadora España
                [3] Madrid Madrid orgnameUniversidad Complutense de Madrid orgdiv1Facultad de Medicina Spain
                [2] Madrid Madrid orgnameUniversidad Complutense de Madrid orgdiv1Facultad de Medicina Spain
                Article
                S0376-78922021000200009 S0376-7892(21)04700200009
                10.4321/s0376-78922021000200009
                7cb6d793-5d2e-424e-b4fb-fef7e26f55d5

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 26 December 2020
                : 10 May 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 26, Pages: 8
                Product

                SciELO Spain

                Categories
                Reconstructiva

                Colgajo ALT flujo inverso,Cobertura rodilla,Colgajo anterolateral muslo,Reverse flow ALT flap,Knee soft-tissue reconstruction,Anterolateral thigh flap

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