Cierre de bolsillo subpectoral para la reconstrucción mamaria: descripción de una nueva técnica quirúrgica mediante el uso de celulosa oxidada regenerada NU-KNIT®

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Abstract

Introducción: El uso de expansor mamario, previo a la reconstrucción definitiva con prótesis, no está exento de complicaciones. Las mismas no solo tienen relación con la presencia de radioterapia perioperatoria, o factores propios de las pacientes, sino que también guardan relación con la cobertura muscular íntegra del expansor mamario. Material y métodos: Revisión retrospectiva de pacientes sometidas a reconstrucción mamaria diferida utilizando una modificación de la técnica del cierre de bolsillo submuscular con celulosa oxidada regenerada NU-KNIT® de expansor mamario. Entre el 1 de enero de 2014 y el 31 de diciembre de 2015 un solo cirujano plástico (J.V.) de la Unidad de Patología Mamaria de la Clínica Alemana de Santiago realizó reconstrucción con dicha técnica en 31 pacientes. Se describe la modificación de la técnica, así como los datos demográficos, histológicos y complicaciones de la fase de expansión de las mismas. Resultados: Se realizaron 40 reconstrucciones mamarias en 31 pacientes. Se presentaron 11 seromas (27,5% del total de los expansores), 2 sufrimientos de colgajo cutáneo con dehiscencia de la herida (5% de los expansores) y una infección de la herida operatoria (2,5% de los expansores). Dos pacientes requirieron aseo quirúrgico por dehiscencia e infección. Una paciente requirió explantación del expansor (2,5% del total de los expansores). Discusión: La modificación de la técnica quirúrgica representa una alternativa segura y reproducible para lograr un cierre total del bolsillo muscular y con ello la cobertura completa del expansor, evitando así algunas de las complicaciones descritas secundarias a una cobertura insuficiente del mismo.

Translated abstract

Introduction: The use of breast expander, prior to the final prosthetic reconstruction, is not exempt from complications. They not only relate to the presence of peri-operative radiation therapy, or patient-related issues; but also related to the muscle integrate coverage of the breast expander. Material and methods: Retrospective review of patients undergoing deferred breast reconstruction using a modification of the technique of sub muscular pocket closing with oxidized regenerated cellulose NU-KNIT TM for the breast expander. Between January 1, 2014 and December 31, 2015 one plastic surgeon (J.V.), from the Breast Pathology Unit at Clínica Alemana de Santiago, performed reconstruction surgeries with this technique in 31 patients. In the present article, the technique modification, demographic data, histological data and the complications which arose during the expansion phase of the same, will be described. Results: 40 breast reconstructions were performed in 31 patients. 11 seromas (27.5% of total expanders), 2 sufferings of skin flap wound dehiscence (5% expanders) and 1 wound infection (2.5% of expanders) were presented. Two patients required surgical debridement due to surgical dehiscence and infection. One patient required explantation of the expander (2.5% of total expanders). Discussion: The modification of the surgical technique represents a safe and reproducible alternative to achieve a complete closure of the muscular pocket and thus a complete coverage of the expander, consequently; avoiding some of the secondary complications drawn from an insufficient coverage of the expander.

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Most cited references 24

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A single surgeon's 12-year experience with tissue expander/implant breast reconstruction: part I. A prospective analysis of early complications.

Gregory McCarthy, Arthur Cordeiro (2006)

Multiple prior reports are conflicted regarding the true incidence of complications following implant-based breast reconstruction. A review of a single surgeon's extensive experience with tissue expander/implant reconstruction provides the opportunity to critically evaluate outcomes in a uniformly treated patient population. The objective of this study was to analyze the development of early complications in patients following two-stage implant breast reconstruction. A review of all tissue expander/implant reconstructions performed by a single surgeon over the 12-year period from July of 1992 to June of 2004 was performed. A prospectively maintained database was analyzed with respect to reconstructive and early complication data on 1522 reconstructions in 1221 patients. Early complications were defined as those occurring 12 months or less from initiation of reconstruction. The overall rate of early complications was 5.8 percent; the rate of premature expander removal was 2.7 percent. The most common complication was infection (2.5 percent). The incidence of complications after tissue expander insertion (8.5 percent) was significantly higher than that after the exchange procedure (2.7 percent). The rate of complications was significantly higher in patients with a history of preoperative chest wall irradiation. There was no difference in the incidence of complications in patients who were expanded during chemotherapy and those who were not. Tissue expander/implant reconstruction is a safe, reliable method of reconstruction with minimal early complications. Early complications are more common after expander insertion. Chemotherapy administered during tissue expansion does not increase the rate of complications. The rate of complications, although higher in previously irradiated patients, remains low.

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Acellular dermis-assisted prosthetic breast reconstruction versus complete submuscular coverage: a head-to-head comparison of outcomes.

Hani Sbitany, Sven N Sandeen, Ashley N Amalfi … (2009)

Complete submuscular tissue expander coverage affords the best protection against implant exposure but restricts lower pole expansion. Techniques using acellular dermis as a pectoralis muscle extension can allow for more rapid fill of the expander and better control of the inframammary fold. This study compares both techniques with regard to relevant outcomes. Results of 100 consecutive breast expander reconstructions performed by two surgeons between 2004 and 2007 were retrospectively reviewed. Patient demographics, expander coverage type, adjuvant treatment, length and characteristics of the expansion, and incidence and types of complications were analyzed. One hundred women underwent breast reconstruction with 172 expanders, in 50 using complete submuscular placement and in 50 using partial subpectoral placement with acellular dermis. The patient groups were similar in terms of demographic data. Mean number of fills to complete reconstruction was 4.31 in the submuscular group and 1.72 in the acellular dermis group (p = 0.0001). Mean intraoperative fill volume was 130 cc in the submuscular group, compared with 412 cc per expander in the acellular dermis group (p = 0.0001). Fisher's exact test demonstrated no significant difference in total complication rate between the two groups (14 percent versus 18 percent; p = 0.79). Acellular dermis allowed for a greater initial fill of saline. This potentially improves cosmetic outcome, as it better capitalizes on preserved mastectomy skin for reconstruction. The authors conclude that acellular dermis-assisted implant breast reconstruction has a safety profile no worse than that of complete submuscular coverage but offers the benefit of fewer expansions and the potential for more predictable secondary revisions.

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Staged breast reconstruction with saline-filled implants in the irradiated breast: recent trends and therapeutic implications.

Gerald Spear, C Obi Onyewu (2000)

A retrospective review was performed of one surgeon's experience with 40 consecutive patients who had undergone two-stage saline-filled implant breast reconstruction and radiation during the period from 1990 through 1997. A randomly selected group of 40 other two-stage saline-filled implant breast reconstructions from the same surgeon and time period served as controls. This review was undertaken because of the absence of specific information on the outcome of staged saline implant reconstructions in the radiated breast. Previously published reports on silicone gel implants and radiation have been contradictory. At the same time, the criteria for the use of radiation in the treatment of breast cancer have been expanded and the numbers of reconstruction patients who have been radiated are increasing dramatically. For example, in a 1985 report on immediate breast reconstruction, only 1 of 185 patients over a 6-year period underwent adjuvant radiation therapy, whereas in this review, there were 40 radiated breasts with saline-filled implants, 19 of which received adjuvant radiation therapy during their expansion. The study parameters included patient age, breast cup size, implant size, length of follow-up, number of procedures, coincident flap operations, Baker classification, complications, opposite breast procedures, pathologic stage, indications for and details about the radiation, and outcomes. The use of radiation in this review of reconstructed breasts can logically be divided into four groups: previous lumpectomy and radiation (n = 7), mastectomy and radiation before reconstruction (n = 9), mastectomy and adjuvant radiation during reconstruction/expansion (n = 19), and radiation after reconstruction (n = 5). The largest and most rapidly growing group of patients is of those receiving postmastectomy adjuvant radiation therapy. A total of 47.5 percent (19 of 40) of radiated breasts with saline implants ultimately needed the addition of, or replacement by, a flap. Ten percent of a control group with nonradiated saline implant reconstructions also had flaps, none as replacements. Fifty percent or more of both the radiated and control groups had contralateral surgery. Complications were far more common in the radiated group; for example, there were 32.5 percent capsular contractures compared with none in the control group. The control nonradiated implant-only group and the flap plus implant radiated group did well cosmetically. The radiated implant-only group was judged the worst. The increasing use of radiation after mastectomy has important implications for breast reconstruction. The possibility for radiation should be thoroughly investigated and anticipated preoperatively before immediate breast reconstruction. Patients with invasive disease, particularly with large tumors or palpable axillary lymph nodes, are especially likely to be encouraged to undergo postmastectomy radiation therapy. The indications for adjuvant radiation therapy have included four or more positive axillary lymph nodes, tumors 4 cm (or more) in diameter, and tumors at or near the margin of resection. More recently, some centers are recommending adjuvant radiation therapy for patients with as few as one positive lymph node or even in situ carcinoma close to the resection margin. The use of latissimus dorsi flaps after radiation has proven to be an excellent solution to postradiation tissue contracture, which can occur during breast expander reconstruction. The use of the latissimus flap electively with skin-sparing mastectomy preradiation is probably unwise, unless postmastectomy radiation is unlikely. Skin-sparing mastectomy with a latissimus flap thus should be preserved for patients unlikely to undergo adjuvant radiation therapy. Purely autologous reconstruction such as a TRAM flap is another option for these patients, either before or after radiation therapy.