<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1025-0255</journal-id>
<journal-title><![CDATA[Revista Archivo Médico de Camagüey]]></journal-title>
<abbrev-journal-title><![CDATA[AMC]]></abbrev-journal-title>
<issn>1025-0255</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Médicas de Camagüey]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1025-02552017000200014</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fractura del extremo proximal del húmero]]></article-title>
<article-title xml:lang="en"><![CDATA[Proximal humeral fractures]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez López]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Lorenzo]]></surname>
<given-names><![CDATA[Yenima de la Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Universitario Manuel Ascunce Domenech . Universidad de Ciencias Médicas. Camagüey, Cuba ]]></institution>
<addr-line><![CDATA[Camagüey ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Policlínico Universitario Tula Aguilera . Universidad de Ciencias Médicas. Camagüey, Cuba ]]></institution>
<addr-line><![CDATA[Camagüey ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<volume>21</volume>
<numero>2</numero>
<fpage>283</fpage>
<lpage>293</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1025-02552017000200014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1025-02552017000200014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1025-02552017000200014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Fundamento: la fractura del extremo proximal del húmero es una enfermedad traumática frecuente, en especial en pacientes que presentan osteoporosis de esta zona anatómica. El tratamiento puede ser conservador o quirúrgico, basado en factores propios del enfermo y del tipo de fractura. Objetivo: profundizar los conocimientos sobre pacientes que sufren de fractura del extremo proximal del húmero debido a su alta incidencia en los servicios de urgencia. Métodos: la búsqueda de la información se realizó en un periodo de un mes (septiembre) y se emplearon las siguientes palabras: fractures of the proximal humerus y shoulder trauma, a partir de la información obtenida se realizó una revisión bibliográfica de un total de 2023 artículos publicados en las bases de datos Pubmed, Hinari, SciELO y Medline mediante el gestor de búsqueda y administrador de referencias EndNote, de ellos se utilizaron 50 citas seleccionadas para realizar la revisión, 47 de ellas de los últimos cinco años, donde se incluyeron siete libros. Desarrollo: se describe la acción de las fuerzas musculares deformantes, así como la clasificación más empleada en esta enfermedad, que los divides en partes. Se hace referencia a los estudios imaginológicos más empleados con especial énfasis en la radiografía convencional. Se describe el tratamiento de cada tipo de fractura basado en la clasificación y se exponen los factores pronósticos relacionados con la isquemia de la cabeza humeral. Conclusiones: las fracturas del extremo proximal del húmero son lesiones frecuentes en especial en pacientes ancianos, debido a la osteoporosis de la zona afectada. El tratamiento conservador o quirúrgico depende de variables propias de cada enfermo y transita desde las modalidades conservadoras a las quirúrgicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Background: fracture of the proximal humerus is a common traumatic affection, affecting patients with osteoporosis on that anatomic region. Treatment may be conservative or surgical and depends on factors related to the patient and the kind of fracture. Objective: to deepen into knowledge of patients with fractures of the proximal humerus because it is highly frequent in casualty department. Methods: an information search in the databases PubMed, Hinari, SciELO and Medline was done through EndNote by using the words fractures of the proximal humerus and shoulder trauma, resulting in a total of 2023 articles which 50 of them were selected for review, 47 of them from the last five years, including seven books. It was conducted for a month (September). Development: muscular deformity forces were described, as well as the most used classification system which divided the fractures in parts. Imaging investigations were pointed out, based mainly on conventional radiographies. Treatment was described according to the type of fracture as well as factors related to osteonecrosis of the humeral head. Conclusions: fracture of the proximal humerus is a common injury in older patients with osteoporosis. Its treatment depends on several factors related to the patients and may be conservative or surgical.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[FRACTURAS DEL HÚMERO]]></kwd>
<kwd lng="es"><![CDATA[HOMBRO]]></kwd>
<kwd lng="es"><![CDATA[PRONÓSTICO]]></kwd>
<kwd lng="es"><![CDATA[OSTEOPOROSIS]]></kwd>
<kwd lng="es"><![CDATA[LITERATURA DE REVISIÓN COMO ASUNTO]]></kwd>
<kwd lng="en"><![CDATA[HUMERAL FRACTURES]]></kwd>
<kwd lng="en"><![CDATA[SHOULDER]]></kwd>
<kwd lng="en"><![CDATA[PROGNOSIS]]></kwd>
<kwd lng="en"><![CDATA[OSTEOPOROSIS]]></kwd>
<kwd lng="en"><![CDATA[REVIEW LITERATURE AS TOPIC]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ART&Iacute;CULOS DE REVISI&Oacute;N</b></font></p>     <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>Fractura del extremo proximal del h&uacute;mero</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b><i>Proximal humeral fractures</i></b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Dr. C. Alejandro &Aacute;lvarez L&oacute;pez <sup>I</sup>;  Dra. Yenima de la   Caridad Garc&iacute;a Lorenzo <sup>I</sup><sup>I</sup></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">I Hospital  Universitario Manuel Ascunce Domenech.  Universidad de Ciencias M&eacute;dicas. Camag&uuml;ey, Cuba.    <br> II Policl&iacute;nico  Universitario Tula Aguilera. Universidad de Ciencias M&eacute;dicas. Camag&uuml;ey, Cuba.</font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p>&nbsp;</p> <hr>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMEN</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fundamento: </b>la fractura del  extremo proximal del h&uacute;mero es una enfermedad traum&aacute;tica frecuente, en especial  en pacientes que presentan osteoporosis de esta zona anat&oacute;mica. El tratamiento  puede ser conservador o quir&uacute;rgico, basado en factores propios del enfermo y  del tipo de fractura.    <br>     <b>Objetivo:</b> profundizar los conocimientos sobre  pacientes que sufren de fractura del extremo proximal del h&uacute;mero debido a su  alta incidencia en los servicios de urgencia.    <br>     <b>M&eacute;todos:</b> la b&uacute;squeda de la informaci&oacute;n se realiz&oacute; en un periodo de un mes  (septiembre) y se emplearon las siguientes palabras: <i>fractures</i> <i>of</i> <i>the proximal humerus y shoulder trauma</i>, a partir de la informaci&oacute;n obtenida se realiz&oacute; una  revisi&oacute;n bibliogr&aacute;fica de un total de 2023 art&iacute;culos publicados en las bases de  datos Pubmed, Hinari, SciELO y Medline mediante el gestor de b&uacute;squeda y  administrador de referencias EndNote, de ellos se utilizaron 50 citas  seleccionadas para realizar la revisi&oacute;n, 47 de ellas de los &uacute;ltimos cinco a&ntilde;os,  donde se incluyeron siete libros. <b>Desarrollo:</b> se describe la acci&oacute;n de las fuerzas musculares deformantes, as&iacute; como la  clasificaci&oacute;n m&aacute;s empleada en esta enfermedad, que los divides en partes. Se  hace referencia a los estudios imaginol&oacute;gicos m&aacute;s empleados con especial  &eacute;nfasis en la radiograf&iacute;a convencional. Se describe el tratamiento de cada tipo  de fractura basado en la clasificaci&oacute;n y se exponen los factores pron&oacute;sticos  relacionados con la isquemia de la cabeza humeral.    <br>     <b>Conclusiones: </b>las fracturas del extremo proximal del h&uacute;mero son  lesiones frecuentes en especial en pacientes ancianos, debido a la osteoporosis  de la zona afectada. El tratamiento conservador o quir&uacute;rgico depende de  variables propias de cada enfermo y transita desde las modalidades conservadoras  a las quir&uacute;rgicas.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>DeCS: </b>FRACTURAS DEL H&Uacute;MERO; HOMBRO/lesiones; PRON&Oacute;STICO; OSTEOPOROSIS; LITERATURA  DE REVISI&Oacute;N COMO ASUNTO.</font></p> <hr align="JUSTIFY">     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"></font><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Background:</b> fracture of the proximal humerus is a common traumatic affection,  affecting patients with osteoporosis on that anatomic region. Treatment may be  conservative or surgical and depends on factors related to the patient and the kind  of fracture.    ]]></body>
<body><![CDATA[<br>     <b>Objective:</b> to deepen into knowledge of patients with fractures of the proximal  humerus because it is highly frequent in casualty department.     <br>     <b>Methods:</b> an information search  in the databases PubMed, Hinari, SciELO and Medline was done through EndNote by  using the words fractures of the proximal humerus and shoulder trauma,  resulting in a total of 2023 articles which 50 of them were selected for  review, 47 of them from the last five years, including seven books. It was conducted  for a month (September).    <br>     <b>Development:</b> muscular deformity forces were described, as well as the most used  classification system which divided the fractures in parts. Imaging  investigations were pointed out, based mainly on conventional radiographies.  Treatment was described according to the type of fracture as well as factors  related to osteonecrosis of the humeral head.    <br>     <b>Conclusions:</b> fracture of the proximal humerus is a common injury in older patients  with osteoporosis. Its treatment depends on several factors related to the  patients and may be conservative or surgical.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>DeCS: </b>HUMERAL  FRACTURES; SHOULDER/injuries;  PROGNOSIS; OSTEOPOROSIS; REVIEW LITERATURE AS TOPIC.</font></p> <hr align="JUSTIFY">     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>&nbsp;</b></font></p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>INTRODUCCI&Oacute;N</b> </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La  fractura del extremo proximal del h&uacute;mero FEPH es una enfermedad traum&aacute;tica  encontrada con relativa frecuencia en los servicios de urgencias. <sup>1, 2</sup>  Seg&uacute;n Egol KE, et al, <sup>3</sup> la incidencia de esta afecci&oacute;n es del 4 % al  5 % de todas las fracturas y el 45 % de las fracturas del h&uacute;mero, adem&aacute;s un 85  % no son desplazadas. Afecta a 300 000 personas al a&ntilde;o en los Estados Unidos de  Am&eacute;rica y es m&aacute;s frecuente que la fractura de cadera.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La  FEPH tiene un comportamiento bimodal en relaci&oacute;n al mecanismo de producci&oacute;n, el  t&iacute;pico se caracteriza por una ca&iacute;da sobre la mano y por compresi&oacute;n axial, lo  que desencadena la fractura, esta modalidad ocurre por lo general en el sexo  femenino con una raz&oacute;n de dos a uno y se asocia a osteoporosis de la zona  fracturada. <sup>4-6</sup> La segunda modalidad es debida a traumas de alta  energ&iacute;a, afecta por lo general a pacientes j&oacute;venes y se asocia a da&ntilde;o de las  estructuras capsulo-ligamentosa de la articulaci&oacute;n. <sup>7-9</sup></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El  cuadro cl&iacute;nico t&iacute;pico es el de un paciente que despu&eacute;s de sufrir un trauma en  su hombro, acude al servicio de urgencia con dolor e incapacidad para mover la  articulaci&oacute;n, por lo general el miembro afectado esta sostenido por el sano. La  exploraci&oacute;n f&iacute;sica muestra cierto grado de deformidad, equimosis de la zona y  limitaci&oacute;n marcada del movimiento articular acompa&ntilde;ada de crepitaci&oacute;n. Aunque  es necesaria la exploraci&oacute;n vasculo-nerviosa, las lesiones de este tipo no son  frecuentes.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Una  vez terminada la exploraci&oacute;n f&iacute;sica se indican vistas radiogr&aacute;ficas, para  confirmar el diagn&oacute;stico y conocer la configuraci&oacute;n y la magnitud de la  fractura. <sup>10-12</sup>    <br>   El  tratamiento var&iacute;a del conservador al quir&uacute;rgico, para su selecci&oacute;n se conjugan  experiencia del cirujano, tipo de lesi&oacute;n en cuanto a magnitud y desplazamiento,  edad del enfermo, as&iacute; como nivel de actividad f&iacute;sica. <sup>13-15</sup>    <br>   El objetivo del  trabajo es profundizar sobre pacientes que sufren de FEPH debido a su alta  incidencia en los servicios de urgencia.</font></p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>M&Eacute;TODOS</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La b&uacute;squeda de la informaci&oacute;n se realiz&oacute; en un periodo de un mes (septiembre)  y se emplearon las siguientes palabras: <i>fractures  of the proximal humerus y shoulder trauma</i>, a  partir de la informaci&oacute;n obtenida se realiz&oacute; una revisi&oacute;n bibliogr&aacute;fica de un  total de 2023 art&iacute;culos publicados en las bases de datos PubMed, Hinari, SciELO  y Medline mediante el gestor de b&uacute;squeda y administrador de referencias EndNote,  de ellos se utilizaron 50 citas seleccionadas para realizar la revisi&oacute;n, 47 de  ellas de los &uacute;ltimos cinco a&ntilde;os donde se incluyeron siete libros.</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se consideraron  estudios de pacientes con FEPH, diagn&oacute;stico cl&iacute;nico e imaginol&oacute;gico tratamiento  conservador y quir&uacute;rgico donde se incluy&oacute; el artrosc&oacute;pico y factores  pron&oacute;sticos de la isquemia de la cabeza humeral. Se excluyeron las investigaciones de  pacientes que abordaban la FEPH de tipo patol&oacute;gicas por tumores e infecciones.</font></p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>DESARROLLO</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las fuerzas musculares  deformantes que act&uacute;an en la zona proximal del h&uacute;mero son: el supraespinoso,  que desplaza el troquiter en sentido superior y posterior; el subescapular  responsable del desplazamiento medial del troqu&iacute;n; el pectoral mayor, que  desplaza la di&aacute;fisis humeral de forma medial y el deltoides que desplaza el  fragmento proximal en abducci&oacute;n. <sup>16-18</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En relaci&oacute;n a la  clasificaci&oacute;n, tiene vigencia la descrita por Neer CS <sup>19</sup> del a&ntilde;o  1970, la cual define dos elementos esenciales; uno como el concepto de parte y  otra el de desplazamiento. Se definen como partes el troquiter, troqu&iacute;n,  di&aacute;fisis humeral y la cabeza humeral. Por otro lado, se considera parte  desplazada aquella que est&aacute; separada m&aacute;s de un cent&iacute;metro y angulada m&aacute;s de 45  grados. De all&iacute;, que existen varios tipos de fractura:    <br>   Una parte: no  existe desplazamiento de manera independiente del n&uacute;mero de fragmentos. <sup>20, 21</sup>    <br>   Dos partes: cuando  existe desplazamiento de uno de las siguientes partes: cuello anat&oacute;mico, cuello  quir&uacute;rgico, troquiter y troqu&iacute;n. <sup>19, 21</sup>    <br>   Tres partes: ocurre  el desplazamiento del cuello quir&uacute;rgico con el troquiter y desplazamiento del  cuello quir&uacute;rgico con el troqu&iacute;n. <sup>19, 21</sup>    <br>   Cuatro partes:  cuando existe el desplazamiento de tres partes. <sup>19, 21</sup>    <br>   Adem&aacute;s de la  clasificaci&oacute;n anterior, tambi&eacute;n pueden ser clasificadas en luxo-fracturas y  fracturas articulares. <sup>22-24</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El examen  imaginol&oacute;gico est&aacute; compuesto por las proyecciones radiogr&aacute;ficas en vistas  anteroposterior, lateral o en Y y la vista axial, pero esta &uacute;ltima es dif&iacute;cil  debido a que el dolor que presentan estos enfermos, que le imposibilita la  movilidad de la articulaci&oacute;n, de all&iacute; que se sustituye por la vista de Velpeau.  <sup>25</sup> La tomograf&iacute;a axial computarizada, solo ofrece ventajas para la  evaluaci&oacute;n y detecci&oacute;n de fracturas intrarticulares, ya que no modifica la  evaluaci&oacute;n intra e inter-observador al compararla con la radiograf&iacute;a  convencional <sup>26</sup> para realizar la clasificaci&oacute;n de la fractura seg&uacute;n  la clasificaci&oacute;n de Neer CS. <sup>19</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Tratamiento de las  FEPH basado en la clasificaci&oacute;n de Neer CS: <sup>19</sup>    <br>     <b>Fractura en una parte:    ]]></body>
<body><![CDATA[<br>     </b>consiste en la  inmovilizaci&oacute;n con cabestrillo o Velpeau, se comienza con ejercicios pendulares  de siete a 10 d&iacute;as posteriores al trauma. Se indican controles radiogr&aacute;ficos  seriados, para detectar alg&uacute;n desplazamiento, que obligue a cambiar la  conducta. <sup>3, 19</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fractura en dos partes:</b>    <br>   Cuello anat&oacute;mico:  por lo general se trata de manera quir&uacute;rgica mediante reducci&oacute;n cruenta y  osteos&iacute;ntesis en el paciente joven y mediante reemplazo prot&eacute;sico en el  anciano, este tipo de fractura se asocia a osteonecrosis. <sup>27-29</sup>    <br>   Cuello quir&uacute;rgico:  puede ser tratada de forma conservadora o quir&uacute;rgica, la primera est&aacute;  justificada en aquellas situaciones de fractura estable lo que se entiende por  fractura estable aquella en que los fragmentos se mueven como una sola unidad,  lo que es comprobado por control fluorosc&oacute;pico, adem&aacute;s de pacientes ancianos,  con baja demanda f&iacute;sica y los que no son candidatos quir&uacute;rgicos por alguna  enfermedad de base. <sup>30, 31</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por otra parte, una  de las modalidades empeladas para esta variedad de fractura es la colocaci&oacute;n de  pines o tornillo canulados roscados en su punta, esta modalidad es &uacute;til en  pacientes j&oacute;venes con buena calidad &oacute;sea. Sin embargo, la reducci&oacute;n cruenta y  osteos&iacute;ntesis, es el m&eacute;todo quir&uacute;rgico de elecci&oacute;n, para lo cual se emplean una  amplia variedad de placas y tornillos, entre las que destaca por sus ventajas  las de tipo bloqueada. <sup>32-34</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El reemplazo  prot&eacute;sico es considerado en pacientes con osteopenia marcada y tiene las  siguientes modalidades: hemiartroplastia, artroplastia total o pr&oacute;tesis del  hombro en reversa. <sup>35-37</sup>    <br>   Fractura del  troquiter: la indicaci&oacute;n quir&uacute;rgica est&aacute; justificada en fracturas desplazadas  de cinco a 10 mil&iacute;metros o cinco mil&iacute;metros de traslaci&oacute;n superior, el  tratamiento quir&uacute;rgico consiste en la reducci&oacute;n cruenta y osteos&iacute;ntesis con o  sin reparaci&oacute;n del manguito rotador. <sup>38</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El tratamiento  quir&uacute;rgico tambi&eacute;n puede ser realizado mediante la reducci&oacute;n asistida por  artroscopia, que tiene como ventaja poder observar toda la extensi&oacute;n del  manguito rotador y realizar la reparaci&oacute;n por esta v&iacute;a. Seg&uacute;n Flanagin BA, et  al, <sup>39</sup> la reducci&oacute;n asistida por artroscopia est&aacute; indicada en  pacientes con fractura del troquiter mayor a 10 mil&iacute;metros, en pacientes  j&oacute;venes y atletas con desplazamiento de tres a cinco mil&iacute;metros. Por otra  parte, est&aacute; contraindicada en fracturas del troquiter conminutas, pacientes de  edad avanzada con deficiente calidad &oacute;sea y fracturas muy desplazadas.     <br>   Fracturas del  troqu&iacute;n: el tratamiento es conservador, a no ser que exista bloqueo de la  rotaci&oacute;n interna. <sup>3, 20</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fractura en tres partes:    ]]></body>
<body><![CDATA[<br> </b>son fracturas por  lo general inestables, debido a la acci&oacute;n deformante de los m&uacute;sculos de la  zona, de all&iacute; que el tratamiento es en especial quir&uacute;rgico, excepto para  pacientes debilitados, que no toleran la cirug&iacute;a. Se utilizan placas AO de tipo  bloqueadas o no y se trata de preservar tanto tejido blando como sea posible,  para conservar la vascularizaci&oacute;n de la zona. En pacientes ancianos con severa  osteopenia, es preferible el empleo del reemplazo prot&eacute;sico. <sup>40-42</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fractura en cuatro partes:    <br> </b>la incidencia de  osteonecrosis es del 4 % al 35 %, la reducci&oacute;n cruenta y osteos&iacute;ntesis con  placas, tornillos y cerclajes est&aacute; justificada en pacientes j&oacute;venes con buena calidad  &oacute;sea. En pacientes de mayor edad, est&aacute; indicado el reemplazo prot&eacute;sico  primario. En caso de pacientes ancianos con fracturas en cuatro partes e  impactaci&oacute;n en valgo se intenta la reducci&oacute;n cruenta y osteos&iacute;ntesis, debido al  bajo porcentaje de osteonecrosis en esta variedad. <sup>43-45</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fractura-luxaci&oacute;n:</b>    <br>   Fractura luxaci&oacute;n  en dos partes: el tratamiento es por lo general conservador, no obstante se  deben chequear los fragmentos despu&eacute;s de la reducci&oacute;n, ya que de existir  desplazamiento significativo, est&aacute; justificada la cirug&iacute;a. <sup>46, 48</sup>    <br>   Fractura-luxaci&oacute;n  en tres o cuatro partes: en pacientes j&oacute;venes est&aacute; indicada la reducci&oacute;n  cruenta y osteos&iacute;ntesis; y en pacientes ancianos el reemplazo prot&eacute;sico. <sup>3, 46</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fracturas articulares:    <br> </b>en pacientes por  debajo de 40 a&ntilde;os est&aacute; justificada la reducci&oacute;n cruenta y osteos&iacute;ntesis. Sin  embargo, en pacientes ancianos con afecci&oacute;n de la cabeza humeral mayor al 40 % se  requiere de reemplazo prot&eacute;sico. <sup>3, 48</sup></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las complicaciones  m&aacute;s reportadas en la literatura en relaci&oacute;n a la FEPH son: da&ntilde;o vascular,  lesiones nerviosas, miositis osificante, rigidez del hombro, retardo de la  consolidaci&oacute;n y seudoartrosis, adem&aacute;s de la osteonecrosis. <sup>3,49</sup> Esta  &uacute;ltima es una de la m&aacute;s temidas, de all&iacute; que Hertel R, et al, <sup>50</sup> propone  un sistema de predicci&oacute;n de la isquemia de la cabeza humeral apoyada en la  configuraci&oacute;n de la fractura, para lo cual se basa en el sistema LEGO &reg; que  define cinco planos de fractura b&aacute;sicos con 12 variantes (<a href="#figura1">figura 1</a>).</font></p>     <p align="center"><img src="/img/revistas/amc/v21n2/f014815.jpg" alt="figura 1" width="426" height="436" longdesc="../img n2/f014815.jpg"><a name="figura1"></a></p>     
]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> Adem&aacute;s de tres criterios  adicionales como: longitud de la zona metafisaria medial de la cabeza humeral a  mayor longitud ( &gt; 8 mil&iacute;metros) mayor irrigaci&oacute;n vascular; integridad de la  pared medial, a mayor integridad mejor perfusi&oacute;n vascular y mejor posibilidad  de reducci&oacute;n; y presencia o no de divisi&oacute;n de la cabeza humeral (<a href="#figura2">figura 2</a>).</font></p>     <p align="center"><img src="/img/revistas/amc/v21n2/f024815.jpg" alt="figura 2" width="395" height="203" longdesc="../img n2/f024815.jpg"><a name="figura2"></a></p>     
<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Se propone como  predictores para la isquemia de la cabeza humeral los siguientes: fracturas  tipos dos, nueve, <sup>10,11,12</sup>, desplazamiento angular de la cabeza mayor a 45  grados, desplazamiento de las tuberosidades (troquiter y troqu&iacute;n) mayor a 10  mil&iacute;metros, presencia de divisi&oacute;n de la cabeza humeral y luxofractura.<sup> 50</sup></font></p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSIONES</b></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La FEPH es una lesi&oacute;n frecuente, en especial en  pacientes ancianos, debido a la osteoporosis de la zona afectada. El  tratamiento conservador o quir&uacute;rgico depende de variables propias de cada  enfermo y transita desde las modalidades conservadoras a las quir&uacute;rgicas.  Existen factores relacionados de manera directa con la isquemia de la cabeza  humeral, que de estar presentes orientan a la toma de decisiones en cada caso  en particular.</font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><font size="3">REFERENCIAS BIBLIOGR&Aacute;FICAS</font></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">    <!-- ref --><br>   1. Bell JE, Cadet ER. Shoulder trauma: bone. En: Cannada LK, editor.  Orthopaedic knowledge update: 11. Illinois: Am Acad Orthop Surg; 2014. p. 319-26.    </font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> 2. Dean BJ, Jones LD, Palmer AJ, Macnair RD, Brewer PE, Jayadev C, et al. A review of current surgical practice in the operative treatment of proximal humeral fractures: Does the PROFHER trial demonstrate a need for change? 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<body><![CDATA[<!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> 47. Chen H, Ji X, Zhang Q, Liang X, Tang P. Clinical outcomes of  allograft with locking compression plates for elderly four-part proximal humerus  fractures. J Orthop Surg Res. 2015 Jul;10:114.    </font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> 48. Kathrein S, Joeris A, Kralinger F, Blauth M, Goldhahn J. Significant  differences between local reporting and central assessment of radiographic  complications in a prospective, multicenter study about locking plate fixation  of proximal humerus fractures. J Orthop Trauma. 2016 Oct;30(10):e336-9.    </font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> 49. Ueyama H, Yano K, Kanemura M, Gotani H, Ito S, Sakanaka H. Clinical  outcomes and prognostic factors depending on implant design in the treatment of  proximal humeral fractures: a retrospective study. J Orthop. 2016 Jul;13(4):369-75.    </font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> 50. Hertel R, Hempfing A, Stiehler M, Leunig M. Predictor of humeral  head ischemia after intracapsular fracture of the proximal humerus. J Shoulder  Elbow Surg. 2004 Jul-Aug; 13(4):427-33.    </font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Recibido: 28 de octubre de 2016</font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Aprobado: 27 de enero de 2017</font></p>     <p align="justify">&nbsp;</p>     <p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Dr. C. Alejandro &Aacute;lvarez L&oacute;pez. Doctor en Ciencias M&eacute;dicas. M&aacute;ster en  Urgencias M&eacute;dicas. Especialista de II Grado en Ortopedia y Traumatolog&iacute;a.  Profesor Titular. Hospital Universitario Manuel Ascunce Domenech.  Investigador agregado del CITMA. Universidad de Ciencias M&eacute;dicas. Camag&uuml;ey.  Cuba. Email: <u><a href="mailto:aal.cmw@infomed.sld.cu" target="_blank">aal.cmw@infomed.sld.cu</a></u></font></p>      ]]></body><back>
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