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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">We present a video showing the type <span class="elsevierStyleSmallCaps">I</span> keystone flap technique used in a 79-year-old woman to reconstruct the surgical defect resulting from the excision of a squamous cell carcinoma on her leg&#44; with associated stasis dermatitis and skin changes due to lipodermatosclerosis of the lower limbs&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">First&#44; the flap is designed on the area adjacent to the defect that can provide the largest tissue contribution and greatest tissue mobility &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; After preparation of the surgical field with povidone iodine and local anesthesia with mepivacaine&#44; 2&#37;&#44; plus epinephrine&#44; the tumor is excised&#44; continuing down to but not including the fascia&#46; The skin of the flap is then incised using a scalpel and the subcutaneous tissue is liberated by blunt dissection using scissors&#44; taking care not to damage the perforating vessels&#46; The proximal border is sutured to the defect with silk or staples and a V-Y double advancement is performed at each of the lateral vertices&#46; Finally the distal border is sutured to the defect using silk or staples&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">The keystone flap is mainly used for surgical defects on the lower limbs or trunk&#44; although it has also been employed at other sites&#44; such as on the genitalia and the face&#46; There are no absolute contraindications&#59; relative contraindications include peripheral artery disease and infection&#46; Particular benefits of this flap are its greater viability and the good cosmetic result&#46; Complications can arise from wound infection&#44; hematomas&#44; or necrosis due to damage to the perforating arteries if blunt dissection was not used or was too aggressive&#46; Alternatives to this type of flap are the horn-shaped fasciocutaneous flap&#44; island flap&#44; and full thickness skin graft&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Discussion and Conclusions</span><p id="par0020" class="elsevierStylePara elsevierViewall">The keystone flap was first described in 2003 by Behan&#44;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">1</span></a> who defined 4 subtypes according to complexity of the flap&#46; Type <span class="elsevierStyleSmallCaps">i</span> does not penetrate the muscle fascia and is useful for defects of up to 2<span class="elsevierStyleHsp" style=""></span>cm&#46; Type <span class="elsevierStyleSmallCaps">ii</span> is used to cover larger defects of 2 to 5<span class="elsevierStyleHsp" style=""></span>cm&#44; and has 2 variants&#58; IIA&#44; in which the fascia is incised along the convex border of the flap&#44; and IIB&#44; in which&#44; in addition to the fascial incision&#44; a full thickness skin graft is used to cover the secondary defect&#46; Type <span class="elsevierStyleSmallCaps">iii</span> uses 2 keystone flaps&#44; making it a double keystone&#44; for defects of 5 to 10<span class="elsevierStyleHsp" style=""></span>cm&#46; And type <span class="elsevierStyleSmallCaps">iv</span>&#44; which consists of a rotational keystone flap that requires mobilization of sufficient subfascial tissue&#44; is used mainly to cover open fractures&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">As with other fasciocutaneous flaps&#44; the keystone flap derives its blood supply from the axial and perforating vascular system of the legs&#44; thus guaranteeing its viability&#46; Its design allows it to cover large as well as deep defects&#44; preserving sensitivity and avoiding differences in skin color and texture&#46; Apart from its use in the limbs&#44; this flap has been employed for the reconstruction of defects at other sites&#44; such as the trunk&#44; cheek&#44; nose&#44; lower eyelid&#44; neck&#44; and anogenital region&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">A further advantage of the keystone flap is that the use of skin adjacent to the surgical defect preserves skin appearance and thickness&#44; in contrast to skin grafts&#44; which almost always have a different appearance&#44; as they are derived from skin from a distinct anatomical site&#44; and may be depressed due to a lack of subcutaneous cellular tissue&#46; It should also be noted that full thickness skin grafts generally take longer to perform&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">As can be seen in the video&#44; the keystone flap is not particularly difficult to perform and we consider it to be a very interesting&#44; safe&#44; and rapid option with very good functional and cosmetic results&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Conflicts of Interest</span><p id="par0035" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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Videos of Surgical Procedures in Dermatology
Type I Keystone Island Flap
Colgajo de keystone tipo i
H.A. Cocunubo-Blancoa,
Corresponding author
hacb27@hotmail.com

Corresponding author.
, A. Pérez-Bustillob, E. Manrriqueb, M.Á. Rodríguez-Prietoa
a Servicio de Dermatología, Complejo Asistencial Universitario de León, León, Spain
b Servicio de Dermatología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Design of the type<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleSmallCaps">i</span> keystone flap&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">We present a video showing the type <span class="elsevierStyleSmallCaps">I</span> keystone flap technique used in a 79-year-old woman to reconstruct the surgical defect resulting from the excision of a squamous cell carcinoma on her leg&#44; with associated stasis dermatitis and skin changes due to lipodermatosclerosis of the lower limbs&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">First&#44; the flap is designed on the area adjacent to the defect that can provide the largest tissue contribution and greatest tissue mobility &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; After preparation of the surgical field with povidone iodine and local anesthesia with mepivacaine&#44; 2&#37;&#44; plus epinephrine&#44; the tumor is excised&#44; continuing down to but not including the fascia&#46; The skin of the flap is then incised using a scalpel and the subcutaneous tissue is liberated by blunt dissection using scissors&#44; taking care not to damage the perforating vessels&#46; The proximal border is sutured to the defect with silk or staples and a V-Y double advancement is performed at each of the lateral vertices&#46; Finally the distal border is sutured to the defect using silk or staples&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">The keystone flap is mainly used for surgical defects on the lower limbs or trunk&#44; although it has also been employed at other sites&#44; such as on the genitalia and the face&#46; There are no absolute contraindications&#59; relative contraindications include peripheral artery disease and infection&#46; Particular benefits of this flap are its greater viability and the good cosmetic result&#46; Complications can arise from wound infection&#44; hematomas&#44; or necrosis due to damage to the perforating arteries if blunt dissection was not used or was too aggressive&#46; Alternatives to this type of flap are the horn-shaped fasciocutaneous flap&#44; island flap&#44; and full thickness skin graft&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Discussion and Conclusions</span><p id="par0020" class="elsevierStylePara elsevierViewall">The keystone flap was first described in 2003 by Behan&#44;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">1</span></a> who defined 4 subtypes according to complexity of the flap&#46; Type <span class="elsevierStyleSmallCaps">i</span> does not penetrate the muscle fascia and is useful for defects of up to 2<span class="elsevierStyleHsp" style=""></span>cm&#46; Type <span class="elsevierStyleSmallCaps">ii</span> is used to cover larger defects of 2 to 5<span class="elsevierStyleHsp" style=""></span>cm&#44; and has 2 variants&#58; IIA&#44; in which the fascia is incised along the convex border of the flap&#44; and IIB&#44; in which&#44; in addition to the fascial incision&#44; a full thickness skin graft is used to cover the secondary defect&#46; Type <span class="elsevierStyleSmallCaps">iii</span> uses 2 keystone flaps&#44; making it a double keystone&#44; for defects of 5 to 10<span class="elsevierStyleHsp" style=""></span>cm&#46; And type <span class="elsevierStyleSmallCaps">iv</span>&#44; which consists of a rotational keystone flap that requires mobilization of sufficient subfascial tissue&#44; is used mainly to cover open fractures&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">As with other fasciocutaneous flaps&#44; the keystone flap derives its blood supply from the axial and perforating vascular system of the legs&#44; thus guaranteeing its viability&#46; Its design allows it to cover large as well as deep defects&#44; preserving sensitivity and avoiding differences in skin color and texture&#46; Apart from its use in the limbs&#44; this flap has been employed for the reconstruction of defects at other sites&#44; such as the trunk&#44; cheek&#44; nose&#44; lower eyelid&#44; neck&#44; and anogenital region&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">A further advantage of the keystone flap is that the use of skin adjacent to the surgical defect preserves skin appearance and thickness&#44; in contrast to skin grafts&#44; which almost always have a different appearance&#44; as they are derived from skin from a distinct anatomical site&#44; and may be depressed due to a lack of subcutaneous cellular tissue&#46; It should also be noted that full thickness skin grafts generally take longer to perform&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">As can be seen in the video&#44; the keystone flap is not particularly difficult to perform and we consider it to be a very interesting&#44; safe&#44; and rapid option with very good functional and cosmetic results&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Conflicts of Interest</span><p id="par0035" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Cocunubo-Blanco HA&#44; P&#233;rez-Bustillo A&#44; Manrrique E&#44; Rodr&#237;guez-Prieto M&#193;&#46; Colgajo de keystone tipo <span class="elsevierStyleSmallCaps">i</span>&#46; Actas Dermosifiliogr&#46; 2018&#59;109&#58;71&#8211;72&#46;</p>"
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Article information
ISSN: 15782190
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