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"Defisiensi besi merupakan salah satu penyebab komorbid anemia renal yang dapat meningkatkan mortalitas anak dengan penyakit ginjal kronik (PGK) sehingga dibutuhkan parameter yang bernilai diagnostik baik. Diagnosis defisiensi besi pada PGK sulit karena memerlukan kombinasi parameter yang dipengaruhi inflamasi sehingga tidak praktis dan mahal. Rekomendasi parameter baru yang mudah, lebih murah, dan tidak dipengaruhi oleh inflamasi adalah reticulocyte hemoglobin equivalent (RET-He). Tujuan penelitian adalah mencari titik potong RET-He untuk diagnosis anemia defisiensi besi absolut dan fungsional pada anak PGK. Studi ini merupakan studi potong lintang terhadap 59 anak PGK berusia 2-18 tahun di Indonesia. Kurva receiver operating characteristic (ROC) dikerjakan untuk menentukan titik potong RET-He optimal dengan menggunakan IBM SPSS versi 20. Reticulocyte hemoglobin equivalent dengan titik potong ≤ 25,75 pg (sensitivitas 90,00%, spesifisitas 73,47%, NDP 40,91%, NDN 97,30%, dan akurasi 76,27%) dapat digunakan untuk diagnosis anemia defisiensi besi absolut sedangkan RET-He dengan titik potong ≤ 30,15 pg (sensitivitas 85,71%, spesifisitas 32,79%, NDP 14,63%, NDN 94,44%, dan akurasi 38,98%) tidak dapat digunakan untuk diagnosis anemia defisiensi besi fungsional. Peneliti menarik kesimpulan bahwa RET-He dapat digunakan sebagai parameter anemia defisiensi besi pada anak PGK dengan nilai batasan ≤ 25,75 pg dan penggunaan RET-He dalam mendiagnosis defisiensi besi harus disertai dengan parameter lain seperti hemoglobin (Hb).

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Iron deficiency are one causes of comorbid renal anemia that can increase mortality in pediatric chronic kidney disease (CKD) so that parameters with good diagnostic value are needed. The diagnosis of iron deficiency in CKD is difficult because it requires a combination of parameters which are affected by inflammation so it is impractical and expensive. The new parameter recommendation which is easy, cheaper, and not affected by inflammation is reticulocyte hemoglobin equivalent (RET-He). The aim of the study was to look for RET-He cut-off points in diagnosing absolute and functional iron deficiency anemia in pediatric CKD. This is a cross-sectional study of 59 children aged 2-18 years diagnosed as CKD in Indonesia. The receiver operating characteristic (ROC) curve was performed to determine the optimal RET-He cut off points using IBM SPSS version 20. Reticulocyte hemoglobin equivalent ≤ 25.75 pg (sensitivity 90.00%, specificity 73.47%, PPV 40.91%, NPV 97,30%, and accuracy 76.27%) can be used for the diagnosis of absolute iron deficiency anemia in pediatric CKD while RET-He with a cut off point ≤ 30.15 pg (sensitivity 85.71%, specificity 32.79%, PPV 14.63%, NPV 94.44%, and accuracy 38.98%) cannot be used for the diagnosis of functional iron deficiency anemia. The researcher draws the conclusion that REt-He can be used as a parameter of iron deficiency anemia in pediatric CKD with a cut-off value ≤ 25.75 pg and the usage of RET-He must be accompanied by other parameters such as hemoglobin (Hb)."

"Latar belakang. Anak dengan penyakit jantung bawaan (PJB) berisiko mengalami defisiensi besi dan anemia defisiensi besi (ADB) karena peningkatan kebutuhan besi akibat hipoksia kronik. Diagnosis defisiensi besi pada anak PJB sianotik mengalami tantangan karena terdapat polisitemia dan inflamasi. Reticulocyte hemoglobin equivalent (Ret-He) adalah parameter status besi yang baru dan andal, tetapi belum terdapat nilai potong untuk evaluasi status besi anak PJB sianotik.Tujuan. Mengetahui peran dan menentukan nilai potong Ret-He untuk diagnosis defisiensi besi dan ADB pada anak PJB sianotik.Metode. Penelitian ini merupakan uji diagnostik terhadap 59 anak PJB sianotik usia 3 bulan-18 tahun di RSCM dan RSAB Harapan Kita. Pengambilan darah dilakukan untuk menilai parameter hematologis (hemoglobin, hematokrit, mean corpuscular volume, mean corpuscular hemoglobin) dan biokimiawi status besi standar (feritin serum, saturasi transferin) sebagai baku emas untuk menentukan status besi, kemudian dibandingkan dengan nilai Ret-He. Kurva receiveing operating characteristic (ROC) dikerjakan untuk menentukan nilai potong Ret-He untuk diagnosis defisiensi besi dan ADB.Hasil. Median usia subjek adalah 23(3-209) bulan dengan lelaki 52,5% (n=31). Didapatkan status besi normal 27/59 (45,8%), defisiensi besi 8/59 (13,5%), dan ADB 24/59 (40,7%). Nilai potong Ret-He untuk defisiensi besi adalah 28,8 pg dengan sensitivitas 75%, spesifisitas 85,2%, NDP 60%, NDN 92%, dan AUC 0,828. Nilai potong Ret-He untuk ADB adalah 28,15 pg dengan sensitivitas 75%, spesifisitas 88,9%, NDP 85,7%, NDN 80%, dan AUC 0,824. Parameter Ret-He tetap memerlukan pemeriksaan hemoglobin dalam mendiagnosis ADB. Pada anak PJB sianotik, defisiensi besi dapat ditegakkan dengan nilai Ret-He <28,8 pg dengan hemoglobin >16,5 g/dL. Anemia defisiensi besi dapat ditegakkan dengan nilai Ret-He <28,15 pg atau Ret-He 28,15-28,8 pg dengan hemoglobin <16,5 g/dL.Kesimpulan. Reticulocyte hemoglobin equivalent dapat digunakan untuk mengevaluasi status besi anak PJB sianotik dengan nilai potong < 28,8 pg untuk defisiensi besi dan <28,15 pg untuk ADB.

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Background: Pediatric cyanotic heart disease (CHD) has a significant risk developing iron deficiency and iron deficiency anemia (IDA) due to chronic hypoxia. Diagnostic challenge occurs as polycythemia and inflammation happened. Reticulocyte hemoglobin equivalent (Ret-He) is a new and reliable parameter for iron status evaluation. However, there is no previous study regarding cut-off value in pediatric CHD population.

Objective: To evaluate the role of Ret-He and to determine cut-off points in diagnosis of iron deficiency and IDA in pediatric CHD.

Methods: A diagnostic study of 59 children aged 3 months to 18 years with CHD in Cipto Mangunkusumo Hospital and Harapan Kita Women and Children’s Hospital. The hematological parameters (hemoglobin, hematocrite, mean corpuscular volume, mean corpuscular hemoglobin) and biochemical parameters for iron status (serum ferritin, transferrin saturation) evaluated to determine iron status and then compared to the Ret-He levels. The receiver operating characteristic (ROC) analysis was done for Ret-He cut-off points.

Result: The median age of the subjects was 23(3-209) months-old with 52.5% male (n=31). Normal iron status was found in 27 (45.8%) subjects, iron deficiency in 8 (13.5%) subjects, and IDA 24 (40.7%) subjects. The Ret-He cut-off point for iron deficiency is 28.8 pg (sensitivity 75%, specificity 85.2%, PPV 60%, NPV 92%, and AUC 0.828). The Ret-He cut-off point for IDA is 28.15 pg (sensitivity 75%, specificity 88.9%, PPV 85.7%, NPV 80%, and AUC 0.824). The usage of Ret-He should be accompanied by hemoglobin. In this population, iron deficiency could be diagnosed with Ret-He <28.8 pg with hemoglobin >16.5 g/dL. While IDA could be diagnosed with Ret-He <28.15 pg or Ret-He 28.15-28,8 pg with hemoglobin <16.5 g/dL.

Conclusion. Ret-He could be used as a parameter of iron status in pediatric CHD with a cut-off value <28.8 pg for iron deficiency and <28.15 pg for IDA."

"Defisiensi besi pada pasien penyakit ginjal kronis dengan hemodialisis (PGK-HD) merupakan penyebab terapi erythropoietin-stimulating agent (ESA) menjadi tidak responsif. Soluble transferrin receptor (sTfR) merupakan marker evaluasi status besi serta respons eritropoiesis yang tidak dipengaruhi inflamasi. Indeks sTfR (rasio sTfR/log feritin) diperkirakan dapat meningkatkan performa sTfR. Tujuan penelitian adalah mengevaluasi performa diagnostik sTfR dan indeks sTfR dalam tatalaksana anemia defisiensi besi pada PGK-HD. Penelitian merupakan studi potong lintang yang melibatkan 127 pasien PGK-HD di Unit Hemodialisis RS Cipto Mangunkusumo pada bulan Agustus-September 2018. Setiap subjek diperiksakan sTfR, indeks sTfR, marker besi, feritin, reticulocyte hemoglobin equivalent (RET-He), serta darah perifer lengkap. Saturasi transferin (TSAT) dan RET-He digunakan sebagai baku emas. Uji diagnostik menggunakan Chi Square dan kurva receiver operating characteristic (ROC). Pada penelitian ini didapatkan titik potong sTfR 2,71 mg/L (sensitivitas 83,3%, spesifisitas 56,5%) dan titik potong indeks sTfR 1,39 (sensitivitas 76,2%, spesifisitas 70,6%). Parameter sTfR dapat bermanfaat sebagai skrining dalam penentuan status besi serta respon eritropoiesis pada pasien PGK-HD. Tata laksana terapi besi yang adekuat akan membuat terapi ESA menjadi efektif, sehingga anemia dapat teratasi, dan kualitas hidup pasien membaik.

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Iron deficiency in patients with chronic kidney disease and hemodialysis (CKD-HD) can cause unresponsiveness to erythropoietin-stimulating agent (ESA). Soluble transferrin receptor (sTfR) is a potential marker to evaluate iron status and erythropoiesis response, that’s not influenced by inflammation. The sTfR index (sTfR/log ferritin ratio) has been proposed could increase the diagnostic efficacy than sTfR alone. We evaluated the diagnostic performance of sTfR and sTfR index for management of iron deficiency in CKD-HD. This cross-sectional study was conducted at Cipto Mangunkusumo Hospital, Indonesia from August-September 2018, involving 127 CKD-HD patients. The sTfR level, sTfR index (sTfR/log ferritin), iron status, ferritin level, reticulocyte hemoglobin equivalent (RET-He), and complete blood count were assessed. Transferrin saturation (TSAT) and RET-He were used as references. Diagnostic tests were analyzed using the chi-square test and receiver operating characteristic curve analysis. We identified sTfR cutoff of 2.71 mg/L (sensitivity 83.3%, specificity 56.5%) and sTfR index cutoff of 1.39 (sensitivity 76.2%, specificity 70.6%). The sTfR might be useful as a screening parameter to evaluate iron status and erythropoietin response in CKD-HD patients. Appropriate iron therapy will make ESA therapy more effective, which will help to overcome anemia, and finally will improve the quality of life of CKD-HD patients.

 

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"Kesesuaian antara reticulocyte hemoglobin equivalent (RET-He) dan reticulocyte hemoglobin content (CHr) untuk menilai status besi pasien penyakit ginjal kronik dengan hemodialisis (PGK-HD) belum diketahui. Penelitian ini bertujuan mendapat kesesuaian antara RET-He dan CHr, serta nilai cut off RET-He sebagai target terapi besi pasien PGK-HD. Desain penelitian potong lintang. Subyek 106 pasien PGK-HD yang diperiksa RET-He menggunakan Sysmex XN-2000 dan CHr dengan Siemens ADVIA 2120i. Didapatkan korelasi sangat kuat (r=0,91; p<0,0001) dan kesesuaian yang baik antara RET-He dan CHr (perbedaan rerata 0,5 pg). Nilai cut off RET-He 29,2 pg sebagai target terapi besi pasien PGK-HD memiliki sensitivitas 95,5%, spesifisitas 94%.

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The concordance between reticulocyte hemoglobin equivalent (RET-He) and reticulocyte hemoglobin content (CHr) to assess iron status in chronic kidney disease patients undergoing hemodialysis (CKD-HD) was unknown. The aim of this study was to evaluate the concordance between RET-He and CHr, and to obtain the cut off value of RET-He as iron supplementation target in CKD-HD patients.

A cross sectional study from 106 CKD-HD patients were analysed on both Sysmex XN-2000 and Siemens ADVIA 2120i. There was very strong correlation (r=0.91; p<0.0001) and good concordance between RET-He and CHr (mean bias 0.5 pg). The cut off value of RET-He 29.2 pg were obtained to assess iron supplementation target in CKD-HD patients with sensitivity and specificity were 95.5% and 94% respectively."

"Defisiensi besi merupakan defisiensi nutrisi terbanyak di seluruh dunia, dengan prevalensi tertinggi pada kelompok perempuan usia reproduksi. Di Indonesia prevalensi anemia defisiensi besi pada ibu hamil 50,5%. Penting dilakukan penapisan dini sebelum terjadi anemia defisiensi besi, untuk mencegah komplikasi sistemik yang permanen, pada ibu maupun janin. Saat ini telah dikembangkan parameter ekuivalen hemoglobin retikulosit (RET-He) yang mendeteksi kadar hemoglobin dalam retikulosit. Usia retikulosit di sirkulasi hanya 24-48 jam, maka RET-He lebih menggambarkan keadaan sebenarnya dari status besi pada sumsum tulang. Saat besi di sumsum tulang menurun, RET-He akan mengalami penurunan. Pemeriksaan RET-He dilakukan pada alat hitung sel darah otomatis dan tidak memerlukan tabung darah tambahan karena dilaporkan sebagai bagian dari hitung retikulosit. Penelitian ini bertujuan untuk mendapatkan rentang nilai RET-He pada perempuan usia reproduksi, melakukan penapisan defisiensi besi pada perempuan hamil trimester I dan II menggunakan RET-He dan membandingkannya hemoglobin, feritin, dan saturasi transferin. Juga untuk mendapatkan titik potong RET-He dengan sensitivitas dan spesifisitas yang optimal pada perempuan hamil trimester I dan II. Didapatkan rentang nilai RET-He pada perempuan usia reproduksi 30,69-36,17 pg. Didapatkan 100 perempuan hamil trimester I dan II yang terdiri dari 3 kelompok berdasarkan feritin dan saturasi transferin yaitu 67 (67%) subyek tanpa defisiensi besi, 17 (17%) subyek dengan defisiensi besi tahap I, dan 16 (16%) subyek dengan defisiensi besi tahap II. Rerata ± SD kadar hemoglobin, RET-He, dan saturasi transferin adalah 12,35 ± 1,02 g/dL, 33,60 ± 1,88 pg, dan 28,63 ± 1,07%. Median(min-maks) feritin adalah 40,10 (6,24 ± 191,30) ng/mL. Dari kurva ROC untuk menentukan titik potong nilai RET-He yang memberikan sensitivitas dan spesifisitas terbaik dibandingkan dengan feritin sebagai baku emas, didapatkan RET-He dengan titik potong 33,65 pg pada sensitivitas 67% dan spesifisitas 64,18% dan area under the curve (AUC) 66,4%, serta didapatkan PPV 47,8%, NPV 79,6%, LR positif 1,86 dan LR negatif 0,52. Ditemukan perbedaan bermakna kadar RET-He antara kelompok tanpa defisiensi besi dan kelompok defisiensi besi tahap II dan antara kelompok defisiensi besi tahap I dan tahap II. Tidak terdapat perbedaan bermakna antara kelompok tanpa defisiensi besi dan kelompok defisiensi besi tahap I.

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Iron deficiency is the most common nutrient deficiency in the world, on developing and industrial countries. Population with highest risk of iron deficiencies is women in reproductive ages. In Indonesia the prevalence of iron deficiency anemia in pregnant women is 50,5%. Iron deficiency anemia in pregnancy can affect to both mother and fetus. In order to prevent permanent systemic complications, it is important to do early detection before iron deficiency anemia developed.

On early phase of iron deficiency before anemia developed, we need an additional test of ferritin, serum iron and saturation index aside from complete blood count. Nowadays people developed a parameter named reticulocyte hemoglobin equivalent (RET-He) which detect the hemoglobin in a young erythrocyte. Reticulocyte will be on circulation for only 24-48 hours, so the RET-He will give more appropriate condition of bone marrow iron. In condition where the bone marrow iron is depleted, the RET-He shows a decrease. This parameter can be tested together with CBC, so that it will not need additional blood sample.

This research aim to attain RET-He reference range on reproductive age women, to screen iron deficiency on first and second trimester pregnant women with RET-He and compare it to other parameters that available now : hemoglobin, ferritin, transferrin saturation, and to develope RET-He cut-off with optimal sensitivity and specificity.

RET-He’s reference range on reproductive women is 30,69-36,17 pg. We attained 100 I and II trimester pregnant women which can be divided into 3 groups based on ferritin and transferrin saturation : 67 women (67%) without iron deficiency, 17 women (17%) with iron deficiency stage I, and 16 women (16%) with iron deficiency stage II. Hemoglobin’s, RET-He’s and transferrin saturation’s mean ± SD are 12,35 ± 1,02 g/dL, 33,60 ± 1,88 pg, and 28,63 ± 1,07%. Ferritin’s median(min-max) are 40,10(6,24-191,30) ng/mL. Using ROC curve we found RET-He at 33,65 pg as an optimal cut-off point to differentiate iron deficiency with 67% sensitivity, 64,18% specificity, and 66,4% area under the curve (AUC).

From crosstabs table of RET-He with ferritin as gold standard and 33,65 pg as cut-off point we attained 47,8% PPV, 79,6% NPV, positive LR 1,86 and negative LR 0,52. We found significant differences of RET-He between non-iron deficiency and iron deficiency stage II groups and between iron deficieny stage I and iron deficiency stage II groups. There was no difference between non-iron deficiency and iron deficiency stage I groups."

"ABSTRAK Latar Belakang: Defisiensi besi merupakan salah satu penyebab anemia pada anak dengan penyakit ginjal kronik PGK derajat 5 yang menjalani hemodialisis HD regular. Pemberian besi intravena IV dosis loading terbukti bermanfaat mengoreksi kekurangan besi, namun belum ada studi yang baik mengenai manfaat pemberian besi IV dosis rumatan setelah terjadi replesi besi, untuk mempertahankan kadar hemoglobin Hb dan profil besi. Metoda: Disain studi adalah kohort retrospektif menggunakan data rekam medis, pada anak usia ABSTRACT Background Iron deficiency is a common cause of anemia in children with chronic kidney disease CKD on hemodialysis HD . Iron repletion with intravenous IV iron sucrose formulations has been studied in children, however effectiveness of maintenance IV iron regimens has not been reported extensively. Methods We conducted a retrospective cohort study on children with CKD on HD. Medical records were reviewed on all patients at the Children rsquo s Kidney Center, Cipto Mangunkusumo Hospital between January 1, 2015 and May 31, 2016. Patients with normal hemoglobin Hb and iron values were grouped into patients received IV iron sucrose maintenance and patients without IV iron sucrose maintenance. In the first group, patients received 2 mg kg dose of IV iron sucrose once every other week for 2 doses. Laboratory tests for Hb and iron values were recorded twice. First laboratory test was the baseline, shows normal Hb and iron values in both groups. The second laboratory test was taken after 6 weeks of baseline test. Objectives We assessed effects of IV iron sucrose maintenance by the difference in proportions of iron deficiency anemia between two groups based on repeat laboratory test 6 weeks after baseline test. Results During the study period, a total of 74 children had normal Hb and iron values at the beginning of the study. Forty seven patients received IV iron sucrose maintenance and 27 children did not receive IV iron maintenance. Repeat laboratory test 6 weeks after baseline test shows proportion of iron deficiency anemia was 5 47 10.64 in patients with IV iron and 16 27 59.26 in patients without IV iron. Between group difference for proportions was 48.62 P"