<?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>2184-6499</journal-id>
<journal-title><![CDATA[Revista Portuguesa Otorrinolaringologia e Cirurgia de Cabeça e Pescoço]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Port ORL]]></abbrev-journal-title>
<issn>2184-6499</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2184-64992023000400345</article-id>
<article-id pub-id-type="doi">10.34631/sporl.2048</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Use of Platelet rich plasma in persistent olfactory dysfunction after COVID-19: a prospective study]]></article-title>
<article-title xml:lang="pt"><![CDATA[Plasma rico em plaquetas na disfunção olfativa persistente após COVID-19: um estudo prospetivo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sousa]]></surname>
<given-names><![CDATA[Francisco Alves de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[André de Sousa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Joana Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Correia]]></surname>
<given-names><![CDATA[João Tavares]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[Afonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[Ana Nóbrega]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Mariline]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meireles]]></surname>
<given-names><![CDATA[Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Hospitalar Universitário de Santo António  ]]></institution>
<addr-line><![CDATA[Porto ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>61</volume>
<numero>4</numero>
<fpage>345</fpage>
<lpage>354</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S2184-64992023000400345&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S2184-64992023000400345&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S2184-64992023000400345&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: A promising technique to treat persistent olfactory impairment has recently been explored: platelet rich plasma (PRP) injection into the olfactory mucosa.  Objectives: This study aimed to determine efficacy, safety, and feasibility of a new PRP injection protocol in treating persistent COVID-19 induced olfactory dysfunction (pCIOD).  Material and Methods: Patients with pCIOD lasting for &#8805; 12 months were enrolled. All patients had previously performed olfactory training and adjuvant therapy without achieving substantial improvement. Olfactory perception threshold (OPT) and visual analog scale (VAS) were measured at baseline, one month and three months after injection.  Results: Twenty patients were enrolled. There was a significant change in OPT after injection (mean baseline OPT: 4.36 ± 1.6 versus 1-month after injection: 6.9 ± 2.6, p = 0.012 versus 3-months after injection: 7.2 ± 2.8, p =0.009). No severe complications were reported.  Conclusions: Single-site PRP injection into the olfactory mucosa is a novel, safe and effective approach that may enhance olfactory recovery in pCIOD patients.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Introdução: A injeção de plasma rico em plaquetas (PRP) na mucosa olfativa é uma técnica inovadora e promissora no tratamento da disfunção olfativa persistente.  Objetivos: O objetivo deste estudo foi determinar a eficácia, segurança e viabilidade de um novo protocolo de injeção de PRP no tratamento da disfunção olfativa persistente induzida pela COVID-19 (DOPIC).  Material e métodos: Foram incluídos doentes com DOPIC com duração igual ou superior a 12 meses. Todos tinham previamente realizado treino olfativo e terapêutica adjuvante sem terem obtido melhoria significativa. Os valores do limiar de perceção olfativa (LPO) e da escala visual analógica (EVA) foram medidos antes, 1 mês e 3 meses após a injeção.  Resultados: Foram incluídos 20 doentes. Constatou-se uma alteração significativa nos valores de LPO após a injeção (valores médios de LPO de base: 4,36 ± 1,6 versus 1 mês pós-injeção: 6,9 ± 2,6, p = 0,012 versus 3 meses pós-injeção: 7.2 ± 2.8, p = 0.009). Não foram registadas complicações graves.  Conclusões: A injeção de PRP em local único na mucosa olfativa é uma nova abordagem, segura e eficaz, que pode melhorar a recuperação olfativa nos doentes com DOPIC.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[olfactory dysfunction]]></kwd>
<kwd lng="en"><![CDATA[anosmia]]></kwd>
<kwd lng="en"><![CDATA[hyposmia]]></kwd>
<kwd lng="en"><![CDATA[platelet rich plasma]]></kwd>
<kwd lng="en"><![CDATA[single-site]]></kwd>
<kwd lng="en"><![CDATA[injection]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="pt"><![CDATA[disfunção olfativa]]></kwd>
<kwd lng="pt"><![CDATA[anosmia]]></kwd>
<kwd lng="pt"><![CDATA[hiposmia]]></kwd>
<kwd lng="pt"><![CDATA[plasma rico em plaquetas]]></kwd>
<kwd lng="pt"><![CDATA[injeção]]></kwd>
<kwd lng="pt"><![CDATA[local único]]></kwd>
<kwd lng="pt"><![CDATA[COVID-19]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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