Haemodialysis for paediatric acute kidney injury in a low resource setting: experience from a tertiary hospital in South West Nigeria
Identifieur interne : 002319 ( Pmc/Corpus ); précédent : 002318; suivant : 002320Haemodialysis for paediatric acute kidney injury in a low resource setting: experience from a tertiary hospital in South West Nigeria
Auteurs : Adanze O. Asinobi ; Adebowale D. Ademola ; Michael A. AlaoSource :
- Clinical Kidney Journal [ 2048-8505 ] ; 2015.
Abstract
Acute kidney injury (AKI) is an important cause of preventable mortality among children. Management of AKI may require renal replacement therapy (RRT) but access to RRT for children in low resource settings is limited. Our study explored the role of haemodialysis in the management of children with AKI in a low resource setting in terms of aetiology and outcomes.
A review of patients managed in the Paediatric Nephrology Unit, University College Hospital Ibadan, South-West Nigeria, who underwent haemodialysis for AKI from January 2006 to December 2014.
Sixty-eight patients (55.9% males), aged 3–16 (mean ± standard deviation, 9.0 ± 3.4) years were studied. The causes of AKI were sepsis (22.1%), malaria (17.6%) and glomerulonephritis (17.6%), intravascular haemolysis—cause unknown (16.2%), G6PDH deficiency (7.4%), malignancy (8.8%) and haemoglobinopathy (5.9%). The number of sessions of haemodialysis ranged from 1 to 10 (mode = 2 sessions) over a period of 1–55 days. Mortality was 27.9% (
The outcome of haemodialysis for AKI in Nigeria is relatively good and is related to the underlying aetiology of AKI. In addition to peritoneal dialysis, intermittent haemodialysis may have a role in the management of paediatric AKI in low resource settings and should be supported.
Url:
DOI: 10.1093/ckj/sfv112
PubMed: 26798463
PubMed Central: 4720192
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Haemodialysis for paediatric acute kidney injury in a low resource setting: experience from a tertiary hospital in South West Nigeria</title><author><name sortKey="Asinobi, Adanze O" sort="Asinobi, Adanze O" uniqKey="Asinobi A" first="Adanze O." last="Asinobi">Adanze O. Asinobi</name><affiliation><nlm:aff id="af1"><addr-line>Department of Paediatrics</addr-line>,<institution>College of Medicine, University of Ibadan</institution>,<addr-line>Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation><affiliation><nlm:aff id="af2"><addr-line>Department of Paediatrics</addr-line>,<institution>University College Hospital</institution>,<addr-line>Ibadan, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author><author><name sortKey="Ademola, Adebowale D" sort="Ademola, Adebowale D" uniqKey="Ademola A" first="Adebowale D." last="Ademola">Adebowale D. Ademola</name><affiliation><nlm:aff id="af1"><addr-line>Department of Paediatrics</addr-line>,<institution>College of Medicine, University of Ibadan</institution>,<addr-line>Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation><affiliation><nlm:aff id="af2"><addr-line>Department of Paediatrics</addr-line>,<institution>University College Hospital</institution>,<addr-line>Ibadan, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author><author><name sortKey="Alao, Michael A" sort="Alao, Michael A" uniqKey="Alao M" first="Michael A." last="Alao">Michael A. Alao</name><affiliation><nlm:aff id="af3"><addr-line>Department of Paediatrics</addr-line>,<institution>Bowen University Teaching Hospital</institution>,<addr-line>Ogbomoso, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26798463</idno><idno type="pmc">4720192</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4720192</idno><idno type="RBID">PMC:4720192</idno><idno type="doi">10.1093/ckj/sfv112</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">002319</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002319</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Haemodialysis for paediatric acute kidney injury in a low resource setting: experience from a tertiary hospital in South West Nigeria</title><author><name sortKey="Asinobi, Adanze O" sort="Asinobi, Adanze O" uniqKey="Asinobi A" first="Adanze O." last="Asinobi">Adanze O. Asinobi</name><affiliation><nlm:aff id="af1"><addr-line>Department of Paediatrics</addr-line>,<institution>College of Medicine, University of Ibadan</institution>,<addr-line>Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation><affiliation><nlm:aff id="af2"><addr-line>Department of Paediatrics</addr-line>,<institution>University College Hospital</institution>,<addr-line>Ibadan, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author><author><name sortKey="Ademola, Adebowale D" sort="Ademola, Adebowale D" uniqKey="Ademola A" first="Adebowale D." last="Ademola">Adebowale D. Ademola</name><affiliation><nlm:aff id="af1"><addr-line>Department of Paediatrics</addr-line>,<institution>College of Medicine, University of Ibadan</institution>,<addr-line>Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation><affiliation><nlm:aff id="af2"><addr-line>Department of Paediatrics</addr-line>,<institution>University College Hospital</institution>,<addr-line>Ibadan, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author><author><name sortKey="Alao, Michael A" sort="Alao, Michael A" uniqKey="Alao M" first="Michael A." last="Alao">Michael A. Alao</name><affiliation><nlm:aff id="af3"><addr-line>Department of Paediatrics</addr-line>,<institution>Bowen University Teaching Hospital</institution>,<addr-line>Ogbomoso, Oyo State</addr-line>,<country>Nigeria</country></nlm:aff></affiliation></author></analytic><series><title level="j">Clinical Kidney Journal</title><idno type="ISSN">2048-8505</idno><idno type="eISSN">2048-8513</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Acute kidney injury (AKI) is an important cause of preventable mortality among children. Management of AKI may require renal replacement therapy (RRT) but access to RRT for children in low resource settings is limited. Our study explored the role of haemodialysis in the management of children with AKI in a low resource setting in terms of aetiology and outcomes.</p></sec><sec><title>Methods</title><p>A review of patients managed in the Paediatric Nephrology Unit, University College Hospital Ibadan, South-West Nigeria, who underwent haemodialysis for AKI from January 2006 to December 2014.</p></sec><sec><title>Results</title><p>Sixty-eight patients (55.9% males), aged 3–16 (mean ± standard deviation, 9.0 ± 3.4) years were studied. The causes of AKI were sepsis (22.1%), malaria (17.6%) and glomerulonephritis (17.6%), intravascular haemolysis—cause unknown (16.2%), G6PDH deficiency (7.4%), malignancy (8.8%) and haemoglobinopathy (5.9%). The number of sessions of haemodialysis ranged from 1 to 10 (mode = 2 sessions) over a period of 1–55 days. Mortality was 27.9% (<italic>n</italic> = 19) and was related to the aetiology of AKI (P = 0.000): no deaths among patients with intravascular haemolysis or malaria, six deaths among patients with sepsis (40%), six (50%) among the patients with glomerulonephritis, while all the patients with malignancies died.</p></sec><sec><title>Conclusions</title><p>The outcome of haemodialysis for AKI in Nigeria is relatively good and is related to the underlying aetiology of AKI. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Clin Kidney J</journal-id><journal-id journal-id-type="iso-abbrev">Clin Kidney J</journal-id><journal-id journal-id-type="publisher-id">ckj</journal-id><journal-id journal-id-type="hwp">ndtplus</journal-id><journal-title-group><journal-title>Clinical Kidney Journal</journal-title></journal-title-group><issn pub-type="ppub">2048-8505</issn><issn pub-type="epub">2048-8513</issn><publisher><publisher-name>Oxford University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26798463</article-id><article-id pub-id-type="pmc">4720192</article-id><article-id pub-id-type="doi">10.1093/ckj/sfv112</article-id><article-id pub-id-type="publisher-id">sfv112</article-id><article-categories><subj-group subj-group-type="heading"><subject>Acute Kidney Injury</subject></subj-group></article-categories><title-group><article-title>Haemodialysis for paediatric acute kidney injury in a low resource setting: experience from a tertiary hospital in South West Nigeria</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Asinobi</surname><given-names>Adanze O.</given-names></name><xref ref-type="aff" rid="af1">1</xref><xref ref-type="aff" rid="af2">2</xref></contrib><contrib contrib-type="author"><name><surname>Ademola</surname><given-names>Adebowale D.</given-names></name><xref ref-type="aff" rid="af1">1</xref><xref ref-type="aff" rid="af2">2</xref></contrib><contrib contrib-type="author"><name><surname>Alao</surname><given-names>Michael A.</given-names></name><xref ref-type="aff" rid="af3">3</xref></contrib><aff id="af1"><label>1</label><addr-line>Department of Paediatrics</addr-line>,<institution>College of Medicine, University of Ibadan</institution>,<addr-line>Oyo State</addr-line>,<country>Nigeria</country></aff><aff id="af2"><label>2</label><addr-line>Department of Paediatrics</addr-line>,<institution>University College Hospital</institution>,<addr-line>Ibadan, Oyo State</addr-line>,<country>Nigeria</country></aff><aff id="af3"><label>3</label><addr-line>Department of Paediatrics</addr-line>,<institution>Bowen University Teaching Hospital</institution>,<addr-line>Ogbomoso, Oyo State</addr-line>,<country>Nigeria</country></aff></contrib-group><author-notes><corresp>Correspondence to: Adebowale D. Ademola; E-mail: <email>dr_deboademola@yahoo.co.uk</email></corresp></author-notes><pub-date pub-type="ppub"><month>2</month><year>2016</year></pub-date><pub-date pub-type="epub"><day>14</day><month>11</month><year>2015</year></pub-date><pub-date pub-type="pmc-release"><day>14</day><month>11</month><year>2015</year></pub-date><pmc-comment> PMC Release delay is 0 months and 0 days and was based on the
<volume>9</volume><issue>1</issue><fpage>63</fpage><lpage>68</lpage><history><date date-type="received"><day>31</day><month>5</month><year>2015</year></date><date date-type="accepted"><day>8</day><month>10</month><year>2015</year></date></history><permissions><copyright-statement>© The Author 2015. Published by Oxford University Press on behalf of ERA-EDTA.</copyright-statement><copyright-year>2015</copyright-year><license license-type="creative-commons" xlink:href="http://creativecommons.org/licenses/by-nc/4.0/"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc/4.0/">http://creativecommons.org/licenses/by-nc/4.0/</ext-link>), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com</license-p></license></permissions><self-uri content-type="pdf" xlink:type="simple" xlink:href="sfv112.pdf"></self-uri><abstract><sec><title>Background</title><p>Acute kidney injury (AKI) is an important cause of preventable mortality among children. Management of AKI may require renal replacement therapy (RRT) but access to RRT for children in low resource settings is limited. Our study explored the role of haemodialysis in the management of children with AKI in a low resource setting in terms of aetiology and outcomes.</p></sec><sec><title>Methods</title><p>A review of patients managed in the Paediatric Nephrology Unit, University College Hospital Ibadan, South-West Nigeria, who underwent haemodialysis for AKI from January 2006 to December 2014.</p></sec><sec><title>Results</title><p>Sixty-eight patients (55.9% males), aged 3–16 (mean ± standard deviation, 9.0 ± 3.4) years were studied. The causes of AKI were sepsis (22.1%), malaria (17.6%) and glomerulonephritis (17.6%), intravascular haemolysis—cause unknown (16.2%), G6PDH deficiency (7.4%), malignancy (8.8%) and haemoglobinopathy (5.9%). The number of sessions of haemodialysis ranged from 1 to 10 (mode = 2 sessions) over a period of 1–55 days. Mortality was 27.9% (<italic>n</italic> = 19) and was related to the aetiology of AKI (P = 0.000): no deaths among patients with intravascular haemolysis or malaria, six deaths among patients with sepsis (40%), six (50%) among the patients with glomerulonephritis, while all the patients with malignancies died.</p></sec><sec><title>Conclusions</title><p>The outcome of haemodialysis for AKI in Nigeria is relatively good and is related to the underlying aetiology of AKI. In addition to peritoneal dialysis, intermittent haemodialysis may have a role in the management of paediatric AKI in low resource settings and should be supported.</p></sec></abstract><kwd-group><kwd>acute kidney injury</kwd><kwd>haemodialysis delivery systems</kwd><kwd>international dialysis issues</kwd><kwd>Nigeria</kwd><kwd>paediatrics</kwd></kwd-group></article-meta></front><body><sec sec-type="intro" id="s1"><title>Introduction</title><p>Acute kidney Injury (AKI) is an important cause of morbidity and mortality globally, including in sub-Saharan Africa [<xref rid="SFV112C1" ref-type="bibr">1</xref>–<xref rid="SFV112C4" ref-type="bibr">4</xref>]. One of the ways of limiting the mortality and morbidity associated with AKI is access to renal replacement therapy (RRT). In the developed countries access to renal replacement therapy for patients in AKI is universal, and RRT has evolved over the years to include peritoneal dialysis, haemodialysis and continuous RRT [<xref rid="SFV112C5" ref-type="bibr">5</xref>, <xref rid="SFV112C6" ref-type="bibr">6</xref>].</p><p>In low resource settings including many parts of sub-Saharan Africa, management of children with AKI who require RRT is a challenge [<xref rid="SFV112C7" ref-type="bibr">7</xref>–<xref rid="SFV112C11" ref-type="bibr">11</xref>]. Continuous renal replacement is unavailable in most settings because of cost, non-availability of consumables, need for technical expertise and challenges with power supply. Although haemodialysis can be carried out in all age groups, it is technically more difficult in the very young. Peritoneal dialysis may therefore be the most viable option in young children, because of its technical simplicity and non-requirement of vascular access [<xref rid="SFV112C7" ref-type="bibr">7</xref>, <xref rid="SFV112C10" ref-type="bibr">10</xref>, <xref rid="SFV112C12" ref-type="bibr">12</xref>]. Intermittent haemodialysis, however, may also be a feasible option especially in older children [<xref rid="SFV112C6" ref-type="bibr">6</xref>, <xref rid="SFV112C7" ref-type="bibr">7</xref>, <xref rid="SFV112C10" ref-type="bibr">10</xref>, <xref rid="SFV112C13" ref-type="bibr">13</xref>, <xref rid="SFV112C14" ref-type="bibr">14</xref>]. In addition, intermittent haemodialysis may be the preferred option of RRT in the management of conditions such as acute intoxications or poisoning [<xref rid="SFV112C15" ref-type="bibr">15</xref>].</p><p>Data are sparse on outcomes of intermittent haemodialysis performed in children with AKI in sub-Saharan Africa. Outcomes may be influenced by the aetiology of AKI, late presentation, financial implications and limited availability of weight-appropriate consumables. A review of intermittent haemodialysis in low socioeconomic conditions will provide valuable information regarding its role as a mode of RRT for AKI and in designing programmes for reducing mortality in AKI in the sub-region. We therefore reviewed haemodialysis carried out in children and adolescents with AKI in our centre in terms of aetiology of AKI, indications for dialysis and outcomes.</p></sec><sec sec-type="methods" id="s2"><title>Materials and methods</title><p>The University College Hospital is a tertiary health facility located in Ibadan, the capital city of Oyo State in Southwest Nigeria. Patients come from Oyo State and other parts of the country and include referrals from other hospitals as well as patients who are presenting to a health facility for the first time. The hospital has a paediatric nephrology unit that offers both acute peritoneal dialysis and intermittent haemodialysis [<xref rid="SFV112C10" ref-type="bibr">10</xref>].</p><p>In our centre haemodialysis is carried out in children needing dialysis who weigh 17 kg or above when blood lines and dialysers are available; occasionally we have successfully carried out haemodialysis in children weighing as little as 12 kg, particularly when peritoneal dialysis consumables were not available. In most instances, patients' care-givers paid for haemodialysis whilst in others the haemodialysis was carried out with hospital waivers.</p><p>We performed a review of the database of patients who underwent haemodialysis for AKI from January 2006 to December 2014 in the Paediatric Nephrology Unit, University College Hospital Ibadan. The database included patient's age, gender, and clinical features such as anthropometry, blood pressure at presentation, weight and presence of oliguria. It also included laboratory investigation results such as serum urea and creatinine values, indications for dialysis and outcome.</p><p>AKI was defined as increase in serum creatinine ≥0.3 mg/dL within 48 h, or increase in serum creatinine to ≥1.5 times baseline, which is known or presumed to have occurred within the prior 7 days or urine volume less than <0.5 mL/kg for 6 h. Baseline serum creatinine corresponded to glomerular filtration rate of 120/min as determined by the Schwartz formula [<xref rid="SFV112C16" ref-type="bibr">16</xref>–<xref rid="SFV112C18" ref-type="bibr">18</xref>].</p><p>Fluid retention was defined based on the presence of oedema and/or heart failure on clinical examination. Hypertension was defined as blood pressure ≥95th centile for age, sex and height [<xref rid="SFV112C19" ref-type="bibr">19</xref>], while oliguria was urine output <0.5 mL/kg/h. Aetiology of AKI was grouped into intravascular haemolysis with haemoglobinuria, sepsis [<xref rid="SFV112C20" ref-type="bibr">20</xref>], glomerulonephritis, malignancy, malaria and miscellaneous causes.</p><p>Haemodialysis were performed with Fresenius (Fresenius SE & Co. Bad Homburg, Germany), Dialog+ (B. Braun Medical Inc., Melsungen, Germany) or Nipro-surdial (Nipro Medical Industries Co., Gunma, Japan) machines. Dialysis was carried out with F4, F5 or F6 dialyser (Fresenius SE & Co. Bad Homburg) or Gambro Paediatric Dialysers (Baxter, Deerfield, IL, USA). We aimed for the dialyser that had a surface area that was 0.75–1 times the patient's body surface area [<xref rid="SFV112C21" ref-type="bibr">21</xref>]. Haemodialysis was performed using the femoral venous access. Femoral venous cannulation was carried out with Medcomp 7F single lumen catheters (Medcomp<sup>®</sup>, Harleysville, PA, USA). Extracorporeal blood was usually returned through a 16G intravenous cannula placed in a peripheral vein; in a few children in whom we were not able to get peripheral venous access, blood was returned through a separate femoral catheter. Adult blood lines (Medcomp<sup>®</sup>) were used. When the extracorporeal volume was >10% of the patient's blood volume, the dialysis circuit was primed with whole blood [<xref rid="SFV112C21" ref-type="bibr">21</xref>]. The blood flow rate was usually at 6–8 mL/kg/min [<xref rid="SFV112C21" ref-type="bibr">21</xref>]. Target ultrafiltration usually did not exceed a maximum of 0.2 mL/kg/min [<xref rid="SFV112C21" ref-type="bibr">21</xref>, <xref rid="SFV112C22" ref-type="bibr">22</xref>]. In patients with marked clinical features of fluid retention, heart failure and pulmonary oedema maximum ultrafiltration was 5–10% of the body weight while monitoring the patient for hypovolaemia and hypotension.</p><p>Other management for patients with AKI included treatment of underlying causes or concomitant diseases such as use of antibiotics and antimalarials. Management included fluid restriction to 300–400 mL/m<sup>2</sup>/day and previous days fluid output in patients with oliguric AKI. Patients with packed cell volume <17% were usually transfused with packed cells before haemodialysis to raise packed cell volume to >17%, otherwise anaemic patients were transfused intradialysis with whole blood. Hyperkalaemia were medically managed with 10% calcium gluconate infusion at a dose of 0.3-0.5mL/kg given slowly over 30min while monitoring the patient for bradycardia. Additional measures used to treat hyperkalaemia were nebulized salbutamol, intravenous 8.4% sodium bicarbonate or the use of insulin and glucose infusion. Oral antihypertensives and/or intravenous frusemide were indicated in the management of hypertension. Anti-hypertensives are usually omitted on the day of dialysis until after the dialysis. Severe hypertension was managed with intravenous hydralazine 0.1 mg/kg. Hypotension was managed with boluses of normal saline 20–30 mL/kg over 30 min to 1 h. Two patients demonstrated hypotension before commencement of dialysis and both needed vasopressors and received intravenous dopamine. None of the patients required mechanical ventilation prior to haemodialysis. Management of oliguric AKI with fluid retention included use of intravenous frusemide [<xref rid="SFV112C23" ref-type="bibr">23</xref>].</p><p>Patients' clinical status was monitored and dialysis was discontinued based on improvement of urine output, serum creatinine and fluid status. Availability of funds and dialysis consumables were also factors that limited dialysis in some cases, for instance we do not have chronic RRT programmes, and are not yet able to offer chronic RRT to children who develop end-stage renal disease.</p><p>The primary outcome measure was mortality while secondary outcome measures were duration of hospital admission and number of sessions of haemodialysis. Patient follow-up was for the period of hospital admission.</p><sec id="s2a"><title>Statistics</title><p>Continuous data were summarized as mean ± standard deviation, or median and interquartile range. Discrete variables were summarized as proportions or presented as maximum, minimum and mode. Categorical variables were compared using chi-square tests, Fisher's exact test or Kruskal–Wallis test as appropriate. Means of variables were compared using the Student's <italic>t</italic>-test. P-values of <0.05 were considered significant. Analysis was carried out using the SPSS IBM version 21 software (IBM Corporation).</p></sec><sec id="s2b"><title>Ethical approval</title><p>Ethical approval for the study was obtained from the University of Ibadan/University College Hospital Ibadan Ethical Review Committee. The ethical review committee waived the need to obtain informed consent for the use of the database for the study and the data used in this study are not traceable to individual subjects.</p></sec></sec><sec sec-type="results" id="s3"><title>Results</title><p>A total of 68 patients were included in this study. They were aged 3–16 (9.0 ± 3.4) years and there were 38 males (55.9%). They weighed 13–52 (26.0 ± 9.4) kg, and patient distribution according to age classes 0–4, 5–9, 10–14 and 15–20 years, was 8 (11.8%), 31 (45.6%), 24 (35.3%) and 5 (7.4%) patients, respectively. The serum urea before dialysis was 20.1–86.1(41.1 ± 14.3) mmol/L [121–517 (247 ± 86) mg/dL] while serum creatinine was 203–1670 (610 ± 345) µmol/L [2.3–18.9 (6.9 ± 3.9) mg/dL]. The pattern of blood pressure on admission indicated that 29 patients (42.6%) were hypertensive.</p><sec id="s3a"><title>Aetiology of AKI</title><p>The main identified causes of AKI were sepsis (22.2%), malaria (17.6%) and glomerulonephritis (17.6%). AKI was associated with massive intravascular haemolysis in 24 patients (35.7%), but in 11 (16.6%) the cause of intravascular haemolysis was unknown. Table <xref ref-type="table" rid="SFV112TB1">1</xref> shows the aetiology of AKI. Sepsis was associated with ruptured appendix in two patients, and infective endocarditis, meningitis, wound sepsis and pyomyositis in one patient each. Table <xref ref-type="table" rid="SFV112TB2">2</xref> shows the underlying cause/focus among patients with sepsis. Glomerulonephritis was secondary to acute glomerulonephritis in 10 patients and nephrotic syndrome in two. Malignancy was the cause of AKI in six patients, and was secondary to non-Hodgkin's lymphoma in five patients, including one patient with Burkitt lymphoma. One patient had AKI complicating acquired ventricular septal defect and heart failure, which followed blunt injury to the chest [<xref rid="SFV112C24" ref-type="bibr">24</xref>].
<table-wrap id="SFV112TB1" position="float"><label>Table 1.</label><caption><p>Aetiology of AKI and outcome</p></caption><table frame="hsides" rules="groups"><colgroup span="1"><col align="left" span="1"></col><col align="char" char="(" span="1"></col><col align="left" span="1"></col></colgroup><thead><tr><th align="left" rowspan="1" colspan="1">Diagnosis</th><th align="left" rowspan="1" colspan="1"><italic>N</italic> (%)</th><th align="left" rowspan="1" colspan="1">Mortality</th></tr></thead><tbody><tr><td rowspan="1" colspan="1">Sepsis</td><td rowspan="1" colspan="1">15 (22.1)</td><td rowspan="1" colspan="1">6</td></tr><tr><td rowspan="1" colspan="1">Glomerulonephritis</td><td rowspan="1" colspan="1">12 (17.6)</td><td rowspan="1" colspan="1">6</td></tr><tr><td rowspan="1" colspan="1">Malaria<sup>a</sup></td><td rowspan="1" colspan="1">12 (17.6)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Intravascular haemolysis — cause unknown<sup>a</sup></td><td rowspan="1" colspan="1">11 (16.2)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">G6PDH deficiency<sup>a</sup></td><td rowspan="1" colspan="1">5 (7.4)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Malignancy<sup>b</sup></td><td rowspan="1" colspan="1">6 (8.8)</td><td rowspan="1" colspan="1">6</td></tr><tr><td rowspan="1" colspan="1">Haemoglobinopathy<sup>a,c</sup></td><td rowspan="1" colspan="1">4 (5.9)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">AIHA<sup>a</sup></td><td rowspan="1" colspan="1">1 (1.4)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">HUS</td><td rowspan="1" colspan="1">1 (1.4)</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Acquired VSD following blunt chest trauma</td><td rowspan="1" colspan="1">1 (1.4)</td><td rowspan="1" colspan="1">1</td></tr></tbody></table><table-wrap-foot><fn id="TN1"><p>AIHA, autoimmune haemolytic anaemia; HUS, haemolytic uraemic syndrome; VSD, ventricular septal defect.</p></fn><fn id="TN2"><p><sup>a</sup>Massive intravascular haemolysis with haemoglobinuria was also a feature in five patients with malaria and one of the patients with haemoglobinopathy as well as in all patients with G6PDH deficiency and autoimmune haemolytic anaemia.</p></fn><fn id="TN3"><p><sup>b</sup>Five patients with non-Hodgkin's lymphoma and one patient with recurrent and metastatic Wilms tumour and obstructive uropathy.</p></fn><fn id="TN4"><p><sup>c</sup>Three patients with haemoglobin S, and a patient with haemoglobin SC.</p></fn></table-wrap-foot></table-wrap><table-wrap id="SFV112TB2" position="float"><label>Table 2.</label><caption><p>Underlying cause/focus of sepsis and outcomes</p></caption><table frame="hsides" rules="groups"><colgroup span="1"><col align="left" span="1"></col><col align="left" span="1"></col><col align="left" span="1"></col></colgroup><thead><tr><th align="left" rowspan="1" colspan="1">Underlying cause/focus of sepsis</th><th align="left" rowspan="1" colspan="1"><italic>N</italic></th><th align="left" rowspan="1" colspan="1">Mortality</th></tr></thead><tbody><tr><td rowspan="1" colspan="1">Unidentified cause</td><td rowspan="1" colspan="1">6</td><td rowspan="1" colspan="1">3</td></tr><tr><td rowspan="1" colspan="1">HBV infection</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">HIV</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Lassa fever</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Infective endocarditis</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">1</td></tr><tr><td rowspan="1" colspan="1">Meningitis</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Ruptured appendix with peritonitis</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">1</td></tr><tr><td rowspan="1" colspan="1">Enterocutaneous fistula—post exploratory laparotomy, pelvic abscess, ruptured appendix</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">1</td></tr><tr><td rowspan="1" colspan="1">Wound sepsis</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr><tr><td rowspan="1" colspan="1">Pyomyositis</td><td rowspan="1" colspan="1">1</td><td rowspan="1" colspan="1">–</td></tr></tbody></table><table-wrap-foot><fn id="TN5"><p>HBV, hepatitis B virus; HIV, human immunodeficiency virus infection.</p></fn></table-wrap-foot></table-wrap></p></sec><sec id="s3b"><title>Indications for dialysis</title><p>The indications for dialysis among the patients are indicated in Table <xref ref-type="table" rid="SFV112TB3">3</xref>. Apart from azotaemia, which occurred in all patients, oliguria (72.1%), electrolyte abnormalities (57.4%), fluid retention (48.5%), neurologic abnormalities (22.1%) and abnormal bleeding tendencies (11.8%) were the main indications for dialysis.
<table-wrap id="SFV112TB3" position="float"><label>Table 3.</label><caption><p>Gender, hypertension and indication for dialysis among patients with AKI who underwent haemodialysis at the paediatric nephrology unit University College Hospital Ibadan compared with outcome</p></caption><table frame="hsides" rules="groups"><colgroup span="1"><col align="left" span="1"></col><col align="char" char="(" span="1"></col><col align="char" char="(" span="1"></col><col align="char" char="." span="1"></col></colgroup><thead><tr><th align="left" rowspan="1" colspan="1">Parameter</th><th align="left" rowspan="1" colspan="1"><italic>n</italic> (% of <italic>N</italic> = 68)</th><th align="left" rowspan="1" colspan="1">Mortality (% of <italic>n</italic>)</th><th align="left" rowspan="1" colspan="1">P</th></tr></thead><tbody><tr><td colspan="4" rowspan="1">Gender</td></tr><tr><td rowspan="1" colspan="1"> Male</td><td rowspan="1" colspan="1">38 (55.9)</td><td rowspan="1" colspan="1">10 (26.3)</td><td rowspan="1" colspan="1">0.737</td></tr><tr><td rowspan="1" colspan="1"> Female</td><td rowspan="1" colspan="1">27 (44.3)</td><td rowspan="1" colspan="1">8 (29.6)</td><td rowspan="1" colspan="1"></td></tr><tr><td colspan="4" rowspan="1">Comorbidity</td></tr><tr><td rowspan="1" colspan="1"> Hypertension</td><td rowspan="1" colspan="1">29 (42.6%)</td><td rowspan="1" colspan="1">10 (34.5)</td><td rowspan="1" colspan="1">0.3</td></tr><tr><td colspan="4" rowspan="1">Indication for dialysis</td></tr><tr><td rowspan="1" colspan="1"> Azotaemia</td><td rowspan="1" colspan="1">68 (100)</td><td rowspan="1" colspan="1">17 (27.9)</td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"> Oliguria</td><td rowspan="1" colspan="1">49 (72.1)</td><td rowspan="1" colspan="1">11 (22.4)</td><td rowspan="1" colspan="1">0.105</td></tr><tr><td rowspan="1" colspan="1"> Fluid retention</td><td rowspan="1" colspan="1">33 (48.5)</td><td rowspan="1" colspan="1">14 (42.5)</td><td rowspan="1" colspan="1">0.010<sup>a</sup></td></tr><tr><td rowspan="1" colspan="1"> Electrolyte abnormalities<sup>b</sup></td><td rowspan="1" colspan="1">37 (54.4)</td><td rowspan="1" colspan="1">12 (32.4)</td><td rowspan="1" colspan="1">0.367</td></tr><tr><td rowspan="1" colspan="1"> Abnormal bleeding</td><td rowspan="1" colspan="1">8 (11.8)</td><td rowspan="1" colspan="1">3 (37.5)</td><td rowspan="1" colspan="1">0.521</td></tr><tr><td rowspan="1" colspan="1"> Neurologic abnormalities</td><td rowspan="1" colspan="1">15 (22.1)</td><td rowspan="1" colspan="1">5 (33.3)</td><td rowspan="1" colspan="1">0.598</td></tr></tbody></table><table-wrap-foot><fn id="TN6"><p><sup>a</sup>P < 0.05.</p></fn><fn id="TN7"><p><sup>b</sup>Serum sodium <120 mmol/L (120 mEq/L), serum K >6.5 mmol/L (6.5 mEq/L) or serum <inline-formula><mml:math id="ImEquation1"><mml:mtext>HC</mml:mtext><mml:msup><mml:mrow><mml:msub><mml:mtext>O</mml:mtext><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:math></inline-formula> <15 mmol/L (15 mEq/L).</p></fn></table-wrap-foot></table-wrap></p></sec><sec id="s3c"><title>Management</title><p>The number of sessions of dialysis ranged from 1 to 10 sessions per patient with a modal value of two sessions. The modal number of sessions of dialysis for patients with sepsis, malaria and glomerulonephritis (GN) were two, two and five respectively. The number of days on haemodialysis ranged from 1 to 55 days.</p></sec><sec id="s3d"><title>Outcome</title><p>Forty-nine patients (72.1%) were discharged, while 19 (27.9%) patients died. Two of the discharges were against medical advice. The distribution of mortality by aetiology of AKI was significant. (P = 0.000). Mortality was recorded only among patients with sepsis (46.7%), GN (50%), malignancy (100%) and the patient with traumatic ventricular septal defect also died, while the other patients survived. Mortality was less among patients who were oliguric compared with those who were not, 22.4 versus 42.1% (P = 0.105). Mortality was significantly higher among patients who had fluid retention compared with those who did not, 42.5 versus 14.3% (P = 0.01). Mortality did not vary significantly across the various age groups (P = 0.424). Table <xref ref-type="table" rid="SFV112TB3">3</xref> compares gender, hypertension and indications for dialysis with mortality.</p></sec><sec id="s3e"><title>Duration of admission</title><p>The duration of hospital admission ranged from 2 to 125 days [median 20.5 (interquartile range 15.0–33.0) days]. There was no significant difference in the duration of hospital admission and the aetiology of AKI (P = 0.809).</p></sec></sec><sec sec-type="discussion" id="s4"><title>Discussion</title><p>Our study evaluated Nigerian children and adolescents who received haemodialysis for AKI and found that sepsis (22%), malaria (18%) and glomerulonephritis (18%) were the commonest identified causes of AKI. Haemoglobinuria from massive intravascular haemolysis was an important contributor to AKI (35% of cases). Mortality was relatively low and was related to the underlying cause of AKI. Intermittent haemodialysis is feasible in the management of AKI in Nigerian children and should be used as a modality to reduce mortality from AKI in the sub-Saharan Africa in addition to peritoneal dialysis. To the best of our knowledge our study appears to be the largest series on haemodialysis in paediatric AKI from sub-Saharan Africa.</p><p>The pattern of aetiology of AKI among our patients is consistent with reports from other parts of sub-Saharan Africa and Nigeria which have identified sepsis, acute GN and malaria as leading causes of paediatric AKI. In various studies from Nigeria and studies from elsewhere in sub-Saharan Africa, sepsis, malaria and GN accounted for 7.1–41.8, 13.7–42.8 and 13–17.8% of cases of paediatric AKI in various studies from Sub-Saharan Africa [<xref rid="SFV112C2" ref-type="bibr">2</xref>–<xref rid="SFV112C4" ref-type="bibr">4</xref>, <xref rid="SFV112C11" ref-type="bibr">11</xref>, <xref rid="SFV112C25" ref-type="bibr">25</xref>]. On the other hand, massive intravascular haemolysis with haemoglobinuria has been reported in 6-42.8% of AKI patients in reports from India and sub-Saharan Africa [<xref rid="SFV112C25" ref-type="bibr">25</xref>–<xref rid="SFV112C27" ref-type="bibr">27</xref>]. The intravascular haemolysis is frequently due to malaria, G6PDH deficiency or haemoglobinopathy in these studies. Early presentation, treatment of the underlying cause where possible, urine alkalinization and appropriate fluid and diuretic management may prevent AKI secondary to haemoglobinuria [<xref rid="SFV112C28" ref-type="bibr">28</xref>].</p><p>The aetiology of AKI in developed countries has expanded to include AKI due to advancements in cardiac surgery, solid organ and bone marrow transplantation and malignancies [<xref rid="SFV112C29" ref-type="bibr">29</xref>–<xref rid="SFV112C32" ref-type="bibr">32</xref>]. In Kuwait 50% of the children with AKI had haematological malignancies [<xref rid="SFV112C33" ref-type="bibr">33</xref>]. In our setting cardiac surgery and solid organ and bone marrow transplantation are not routinely available, so we do not have causes secondary to such advancements in medical care, and as such most of our patients were not critically ill. In addition, haemolytic uraemic syndrome, which is a common cause of AKI in many other parts of the world including South Africa and East Africa, is not a common cause among our patients [<xref rid="SFV112C25" ref-type="bibr">25</xref>, <xref rid="SFV112C29" ref-type="bibr">29</xref>, <xref rid="SFV112C34" ref-type="bibr">34</xref>–<xref rid="SFV112C37" ref-type="bibr">37</xref>]. Previous studies from Nigeria have not identified haemolytic uraemic syndrome as a common cause of AKI among children [<xref rid="SFV112C2" ref-type="bibr">2</xref>–<xref rid="SFV112C4" ref-type="bibr">4</xref>, <xref rid="SFV112C10" ref-type="bibr">10</xref>]. This may be partly due to the cultural practice of cooking meat for a long period that is prevalent in Nigeria.</p><p>Haemodialysis in paediatric AKI was associated with 72% survival. Studies from developed countries showed overall survival following RRT in AKI to range from 52 to 58% while outcome of haemodialysis (HD) in AKI ranged from 73 to 90% [<xref rid="SFV112C31" ref-type="bibr">31</xref>, <xref rid="SFV112C32" ref-type="bibr">32</xref>, <xref rid="SFV112C38" ref-type="bibr">38</xref>, <xref rid="SFV112C39" ref-type="bibr">39</xref>]. Survival following intermittent haemodialysis among our patients is relatively good when compared with reports on RRT for AKI from other developing countries, which ranged from 19 to 67% [<xref rid="SFV112C37" ref-type="bibr">37</xref>, <xref rid="SFV112C40" ref-type="bibr">40</xref>, <xref rid="SFV112C41" ref-type="bibr">41</xref>]. The outcome of HD for AKI in our study is comparable to the range of 59–78% for RRT in Nigerian children with AKI [<xref rid="SFV112C7" ref-type="bibr">7</xref>, <xref rid="SFV112C10" ref-type="bibr">10</xref>, <xref rid="SFV112C12" ref-type="bibr">12</xref>]. Haemodialysis outcome in AKI patients in the present study is also comparable to a previous report on peritoneal dialysis for AKI from our centre in which 70% of patients survived until discharge.</p><p>Factors associated with mortality among our patients included the underlying cause of AKI, and patients with an irreversible cause of AKI were more likely to die than patients who had reversible causes of AKI. For instance all the patients who had malignancies died whereas no mortality was recorded among patients with intravascular haemolysis or malaria. Mortality was also high among patients with glomerulonephritis; this was probably because the patients with glomerulonephritis may have had rapidly progressive glomerulonephritis, and are more likely to become dialysis dependent. The absence of chronic RRT might have contributed to the high mortality among patients with glomerulonephritis [<xref rid="SFV112C10" ref-type="bibr">10</xref>, <xref rid="SFV112C30" ref-type="bibr">30</xref>]. Fluid retention was significantly associated with mortality among our patients and this is may be consistent with studies that have associated fluid overload with mortality in patients who receive RRT for AKI [<xref rid="SFV112C42" ref-type="bibr">42</xref>–<xref rid="SFV112C44" ref-type="bibr">44</xref>]. Mortality was also recorded among patients in whom AKI was secondary to heart disease, and haemodynamic instability may have contributed to mortality in these patients [<xref rid="SFV112C32" ref-type="bibr">32</xref>]. However, haemodynamic instability was not a prominent feature in many of our patients. The very high mortality among patients with AKI secondary to malignancies is also related to the underlying illness, with late presentation and limited access to definitive and optimal supportive treatment for children with malignancies.</p><p>Many Nigerian studies have documented the low dialysis access rate in children with AKI [<xref rid="SFV112C2" ref-type="bibr">2</xref>–<xref rid="SFV112C4" ref-type="bibr">4</xref>, <xref rid="SFV112C11" ref-type="bibr">11</xref>]. Our study indicates that intermittent haemodialysis is a feasible option for reducing preventable deaths from AKI in low resource settings, especially in settings with established haemodialysis units and paediatric nephrologists. There are about 100 centres with haemodialysis units in Nigeria, although most units are small and many have fewer than 5–10 haemodialysis machines. There are also about 26 paediatric nephrologists in the country and virtually all of them are located in 15 of the centres with haemodialysis units. However, while intermittent haemodialysis has long been established as a mode of therapy for adults with AKI in our setting, the same services need to be made more available to children [<xref rid="SFV112C45" ref-type="bibr">45</xref>].</p><p>Challenges that will need to be overcome to provide paediatric haemodialysis include cost and access to weight-appropriate consumables such as dialysers, blood lines and catheters. Consumables for paediatric haemodialysis are not readily available in many parts of sub-Saharan Africa. We did not have regular supply of paediatric size dialysers, in addition we did not have paediatric and neonatal blood lines. Haemodialysis was therefore carried out using adult blood lines. Modifications had to be made in very young children, such as sometimes priming the dialysis circuit with blood if the extracorporeal volume was >10%. Ready access to weight-appropriate blood lines and dialysers will allow us to carry out routine haemodialysis in young children. This will particularly be relevant in, for instance, situations of AKI secondary to poisoning such as diethylene glycol poisoning where haemodialysis is the RRT of choice. There was an epidemic of diethylene glycol poisoning among toddlers in Nigeria in 2008 in which about 88 out of 89 affected children died and non-availability of paediatric haemodialysis appeared to have contributed to their mortality [<xref rid="SFV112C15" ref-type="bibr">15</xref>]. However, especially in many young children with AKI peritoneal dialysis will be a feasible way of treating AKI, and both haemodialysis and peritoneal dialysis should be promoted in the management of paediatric AKI in developing countries.</p><p>In our centre haemodialysis may be relatively cheaper than peritoneal dialysis unlike in developed countries. The cost of peritoneal dialysis increases with the weight and therefore the age of the patient, mainly because bigger children will require more peritoneal dialysis fluid. The cost of acute peritoneal dialysis, in our centre, will range from 75 to 220 USD (15 000–43 750 Nigerian Naira) in a child who weighs about 10 kg to about 175–300 USD (35 000–60 000 Nigerian Naira) in a 17 kg patient depending on the prevailing local cost of continuous ambulatory peritoneal dialysis (CAPD) fluid. Cost of CAPD fluid tends to vary between 8 and 18 USD (1500–3500 Nigerian Naira) for a 2 L bag, and we have estimated cost of provision of acute peritoneal dialysis over a period of 5 days. On the other hand, haemodialysis for paediatric patients seen in our hospital is half the cost in adult patients and is currently at about 70 USD (13 750 Nigerian Naira) per session, so the cost of about two sessions of haemodialysis will be comparable to the cost of peritoneal dialysis in young children. Similarly, Obiagwu in Kano Nigeria found that the cost of haemodialysis, carried out mostly in children >5 years, was not significantly higher than peritoneal dialysis [<xref rid="SFV112C46" ref-type="bibr">46</xref>]. In their study peritoneal dialysis was usually carried out in younger children. Many times however, parents are unable to afford the cost of haemodialysis or peritoneal dialysis. Efforts to make both modalities more affordable are needed to improve access to dialysis in AKI in many parts of sub-Saharan Africa.</p><p>Government should support the cost of intermittent haemodialysis for children with AKI for example through waivers, subsidies or medical insurance. Many of our patients recovered with one to five sessions of haemodialysis. The cost of one to five sessions of haemodialysis for a potentially reversible illness is not too prohibitive and should therefore be made affordable. Continued advocacy at both governmental and non-governmental levels for paediatric haemodialysis consumables to be available locally is necessary. Training of nursing staff in paediatric haemodialysis is required, while training of more paediatric nephrologists will also be needed. The International Society of Nephrology and International Paediatric Nephrology Association currently have fellowship programmes for training paediatric nephrologists who practice in low resource settings; such programmes should be sustained. In addition, guidelines on haemodialysis including anticoagulation in the paediatric patients are available, which can also guide paediatric haemodialysis treatment in low resource settings [<xref rid="SFV112C21" ref-type="bibr">21</xref>, <xref rid="SFV112C22" ref-type="bibr">22</xref>, <xref rid="SFV112C47" ref-type="bibr">47</xref>].</p><p>Paediatric haemodialysis will also be relevant in other countries in sub-Saharan Africa as the pattern of aetiology of AKI is similar across the countries with sepsis, malaria and glomerulonephritis as common causes of AKI [<xref rid="SFV112C2" ref-type="bibr">2</xref>–<xref rid="SFV112C4" ref-type="bibr">4</xref>, <xref rid="SFV112C11" ref-type="bibr">11</xref>, <xref rid="SFV112C25" ref-type="bibr">25</xref>, <xref rid="SFV112C26" ref-type="bibr">26</xref>, <xref rid="SFV112C48" ref-type="bibr">48</xref>]. Although many countries in sub-Saharan Africa may not have the same number of paediatric nephrologists or haemodialysis units as in Nigeria, in many of these countries there is some form of haemodialysis available for adult patients, particularly in tertiary centres. Paediatric intermittent haemodialysis may also be relevant in these regions, particularly where paediatric nephrologists work in tertiary institutions with facilities for adult haemodialysis. Our study also underscores the fact that haemodialysis will have to be combined with other modalities for the prevention and management of AKI. Additional efforts will include education of medical practitioners and health workers about risk factors, treatment, referral and prevention of AKI. Attention may need to be paid to meticulous management of fluid balance in children and adolescents with AKI. There will be need for peritoneal dialysis particularly in young patients, and haemodynamically unstable patients. Our study however, indicates that haemodialysis is also a feasible option for reducing preventable deaths from AKI in low resource settings, especially in regions where there are paediatric nephrologists working in centres that have haemodialysis units. Availability of both haemodialysis and peritoneal dialysis for paediatric AKI will go a long way in actualizing the global goal of zero preventable deaths from AKI by the year 2025 [<xref rid="SFV112C49" ref-type="bibr">49</xref>].</p><p>In conclusion, we reviewed outcome of haemodialysis in children who were in AKI in our centre. Sepsis, malaria and glomerulonephritis were the commonest causes of AKI. Survival was relatively good, and outcome was related to the aetiology of AKI. Intermittent haemodialysis is a feasible option, in addition to peritoneal dialysis, for improvement of outcomes of paediatric AKI in sub-Saharan Africa. Paediatric haemodialysis should be supported in low resource settings through access to appropriate sized consumables and training of nurses in centres that have paediatric nephrologists and haemodialysis units.</p></sec><sec id="s5"><title>Conflict of interest statement</title><p>The authors have no conflict of interest to declare and the results presented in this paper have not been published previously in whole or in part, except in an abstract format.</p></sec></body><back><ack><title>Acknowledgements</title><p>The authors acknowledge the efforts of the resident doctors and the nursing team who looked after the patients. 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