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Letter to the Editor
Ethical limits for noninvasive ventilation prescription
Limites éticos para a prescrição de ventilação não invasiva
M. Simões Saldanha Mendesa,
Corresponding author
marianacarocha@gmail.com

Corresponding author.
, C. Ferreirab, C. Diasb, J. Moitab
a Centro Hospitalar da Cova da Beira, CPE, Covilhã, Portugal
b Serviço de Pneumologia B, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
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        "titulo" => "Limites &#233;ticos para a prescri&#231;&#227;o de ventila&#231;&#227;o n&#227;o invasiva"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Non-Invasive Ventilation &#40;NIV&#41; is the treatment of choice in acute respiratory failure &#40;ARF&#41; related to Chronic Obstructive Pulmonary Disease exacerbation and Acute Cardiogenic Pulmonary Edema&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;2</span></a> It has also demonstrated good results in a set of other consensual and systematized pathologies&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;2</span></a> In addition NIV has been used as an alternative for ARF patients who have &#8220;do-not-intubate&#8221; orders either due to poor prognosis associated with multiple comorbidities or terminal disease&#44; or as palliative management of dyspnea&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Aiming to encourage discussion around this theme&#44; the authors reviewed 508 medical records of patients undergoing NIV between November 2011 and May 2013&#44; in <span class="elsevierStyleItalic">Hospital Geral do Centro Hospitalar e Universit&#225;rio de Coimbra</span>&#44; and identified 15 cases in which the use of NIV was the subject of ethical considerations&#58; 6 patients with advanced cancer disease&#44; 5 with multiple organ dysfunction&#44; 3 with extensive stroke damage&#44; and one patient with respiratory failure &#40;RF&#41; of central origin&#46; The patients&#44; 4 male and 11 females&#44; had an average age of 65<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>15&#44; and had an average age-adjusted Charlson comorbidity index of 6&#46;5<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>3&#46;1&#46; Five patients presented type 1 RF&#44; and 9 had type 2 RF&#46; NIV was administered to one patient despite a lack of RF criteria&#46; The average PaO<span class="elsevierStyleInf">2</span>&#47;FiO<span class="elsevierStyleInf">2</span> ratio was 187&#46;9<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>60&#46;2&#44; and average PaCO<span class="elsevierStyleInf">2</span> was 58&#46;3<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>25&#46;0<span class="elsevierStyleHsp" style=""></span>mmHg&#46; Seven patients presented acidosis &#40;average pH&#58; 7&#46;19<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>0&#46;13&#41;&#58; mixed in 4 cases&#44; respiratory in 2&#44; and metabolic in one patient&#46; The application of pressure support ventilation of 11&#46;4<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>2&#46;8<span class="elsevierStyleHsp" style=""></span>cmH<span class="elsevierStyleInf">2</span>O&#44; with 50&#46;4<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>21&#46;7&#37; FiO<span class="elsevierStyleInf">2</span> led to improved pH&#44; PaO<span class="elsevierStyleInf">2</span>&#47;FiO<span class="elsevierStyleInf">2</span> and PaCO<span class="elsevierStyleInf">2</span> but showed no statistical significance &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; After 3&#46;0<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>4&#46;2 days of NIV 13 of the 15 patients died&#46; None of the 10 patients capable of assessing the efficacy subjectively referred relief of dyspnea&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">In conclusion&#44; we do not consider it appropriate to use NIV in situations where there is no legitimate justification&#46; On the contrary&#58; it is an inefficient and costly approach and often leads to misperceptions about end of life management&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> With our limited public health resources providing differentiated treatments to those who do not benefit from them could be considered ethically reprehensible because&#44; as a consequence&#44; treatment may not then be available for those who would benefit&#46; NIV can on occasions contribute to a patient&#8217; comfort&#44; when combined with other measures &#40;like administration of morphine&#41; in the appropriate institutions&#44; but not in hospital emergency room&#46;</p></span>"
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Pulmonology

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