diff --git a/1.sources/MyHealth/docroot/medicaltest/MedicalTests.xhtml b/1.sources/MyHealth/docroot/medicaltest/MedicalTests.xhtml
index 3e298f0..fe6dee4 100644
--- a/1.sources/MyHealth/docroot/medicaltest/MedicalTests.xhtml
+++ b/1.sources/MyHealth/docroot/medicaltest/MedicalTests.xhtml
@@ -11,13 +11,11 @@
 <ui:composition template="../header.xhtml">
 	<ui:define name="content">
 		<h:form id="frmMT">
-			<p:messages id="mesgs" showDetail="true" closable="true"
-				autoupdate="true" />
 			<div class="ui-g ui-fluid">
 				<div class="ui-g-5 ui-md-5">
 					<p:panel id="mainPanel" header="Pruebas médicas">
 						<f:facet name="actions">
-				            <h:commandLink action="#{mt.addMT}" immediate="true" update="frmMT" rendered="#{mt.patIdSelected != -1}" styleClass="ui-panel-titlebar-icon ui-corner-all ui-state-default">
+				            <h:commandLink action="#{mt.addMT}" immediate="true" update="frmMT" styleClass="ui-panel-titlebar-icon ui-corner-all ui-state-default">
 				            	<h:outputText styleClass="ui-icon pi pi-plus" />
 				            </h:commandLink>
 				        </f:facet>
diff --git a/1.sources/MyHealth/src/managedbean/medicalTest/MedicalTestMBean.java b/1.sources/MyHealth/src/managedbean/medicalTest/MedicalTestMBean.java
index aef69ea..48ad5c1 100644
--- a/1.sources/MyHealth/src/managedbean/medicalTest/MedicalTestMBean.java
+++ b/1.sources/MyHealth/src/managedbean/medicalTest/MedicalTestMBean.java
@@ -5,6 +5,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import javax.annotation.PostConstruct;
+import javax.faces.application.FacesMessage;
 import javax.faces.component.html.HtmlSelectOneMenu;
 import javax.faces.event.AjaxBehaviorEvent;
 import javax.faces.view.ViewScoped;
@@ -38,10 +39,10 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 	public void init() {
 		this.userType = SessionUtils.getUserType();
 		this.userID = Integer.valueOf(SessionUtils.getUserId());
-		
+
 		this.selected = null;
 		this.patSelected = null;
-		
+
 		this.loadMedicalTests();
 		this.getPatients();
 	}
@@ -71,11 +72,11 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 	public void setSelected(MedicalTestTO selected) {
 		this.selected = selected;
 	}
-	
+
 	public PatientTO getPatSelected() {
 		return this.patSelected;
 	}
-	
+
 	public void setPatSelected(PatientTO s) {
 		this.patSelected = s;
 	}
@@ -96,10 +97,11 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 		}
 		System.out.println(this.medicalTests);
 	}
-	
+
 	public List<PatientTO> getPatients() {
 		if (userType == UserType.SPECIALIST_DOCTOR) {
-			// Cargar los pacientes a los que ha añadido pruebas médicas el médico especialista
+			// Cargar los pacientes a los que ha añadido pruebas médicas el médico
+			// especialista
 			return getRemoteManagerMedicalTest().loadPatientsForSpecialistDoctor(userID);
 		} else if (userType == UserType.FAMILY_DOCTOR) {
 			// Cargar los pacientes del médico de familia que tiene pruebas médicas hechas
@@ -109,26 +111,27 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 			return new ArrayList<PatientTO>();
 		}
 	}
-	
+
 	public List<MedicalTestTO> getMedicalTests() {
 		return this.medicalTests;
 	}
-	
+
 	public void setMedicalTests(List<MedicalTestTO> list) {
 		// Nothing to do
 	}
 
 	/*************************************************** METODOS PARA LA VISTA */
 	private Integer patIdSelected = -1;
+
 	public void setPatIdSelected(Integer value) {
 		this.patIdSelected = value;
 		this.addNewMode = false;
 	}
-	
+
 	public Integer getPatIdSelected() {
 		return this.patIdSelected;
 	}
-	
+
 	public String getTitlePanel() {
 		String res;
 		if (userType == UserType.PATIENT) {
@@ -146,11 +149,11 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 		}
 		return res;
 	}
-	
+
 	public boolean isPatSelector() {
 		return !(userType == UserType.PATIENT);
 	}
-	
+
 	public void onSelectPatient(AjaxBehaviorEvent event) {
 		this.selected = null;
 		if (userType == UserType.SPECIALIST_DOCTOR) {
@@ -161,17 +164,21 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 			medicalTests = getRemoteManagerMedicalTest().loadMedicalTestForFamilyDoctor(userID, this.patIdSelected);
 		}
 	}
-	
+
 	public void onSelectMT(SelectEvent event) {
 		this.selected = (MedicalTestTO) event.getObject();
 		this.addNewMode = false;
 	}
-	
+
 	public void addMT() {
-		this.selected = new MedicalTestTO();
-		this.selected.setId(-1);
-		this.selected.setObservations("");
-		this.addNewMode = true;
+		if (this.patIdSelected != -1) {
+			this.selected = new MedicalTestTO();
+			this.selected.setId(-1);
+			this.selected.setObservations("");
+			this.addNewMode = true;
+		} else {
+			this.addFacesMessage(FacesMessage.SEVERITY_WARN, "Atención!", "Debe elegir un paciente al que añadir la prueba médica.");
+		}
 	}
 
 	public boolean isAddNewMode() {
@@ -181,14 +188,13 @@ public class MedicalTestMBean extends ManagedBeanBase implements Serializable {
 	public void setAddNewMode(boolean addNewMode) {
 		this.addNewMode = addNewMode;
 	}
-	
+
 	public boolean getViewCreate() {
 		return addNewMode;
 	}
-	
+
 	public boolean getViewEdit() {
 		return !addNewMode && this.selected != null;
 	}
-	
-	
+
 }