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Original Research

BMB. 2021; 6(3): 0-0


Evaluation of Two Consecutive High Sensitivity Cardiac Troponin T Measurements in Healthy Newborns and Newborns with Respiratory Failure

Sinan Tüfekci, Özgür Kızılca, Aliye Çelikkol, Birol Topçu.




Abstract

Abstract
Objective: Data on the umbilical cord and postnatal physiological limits of the high sensitivity cardiac Troponin T (hs cTnT) in newborns are scarse. This study aims to determine the normal values and upper limits of hs cTnT in healthy newborns. In addition, its clinical significance and usability in neonatal respiratory failure were analyzed.
Method: In this non-invasive and retrospective, cross-sectional study, 113 healthy newborns and 93 newborns with non-cardiac respiratory failure, born between July 2018 and January 2020, were evaluated. Hs cTnT was measured in the umbilical cord and 24–96 h after birth in infants.
Results: In the healthy group, median umbilical cord hs cTnT was 38 (17–156) ng/L and 99th percentile hs cTnT was 122 ng/L, and in the respiratory failure group, the median umbilical cord hs cTnT was 72 (27–326) ng/L. Postnatal day 2–4 median hs cTnT was 75 (10–194) ng/L and 99th percentile value was 194 ng/L in the healthy group, and median hs cTnT was 145 (41–409) ng/L in the respiratory failure group. The calculated area under the ROC curve for umbilical cord hs cTnT 0.848 (cut off 64; %95 CI; 0.79-0.90: sensitivity 62.4 % specificity 93.7%), suggesting that umbilical cord hs cTnT is a sensitive marker for prediction of neonatal respiratory failure. The calculated area under the ROC curve for control hs cTnT 0.851 (cut off 121.5; %95 CI; 0.79-0.90; sensitivity 71 % specificity 86.8 %), suggesting that control hs cTnT is a sensitive marker for prediction of neonatal respiratory failure.
Conclusions: The results show that the reference range of umbilical cord and postnatal hs cTnT in healthy newborns is higher than that in adults. Both hs cTnT values were higher in neonatal respiratory failure group than those in the healthy group.

Öz
Amaç: Yenidoğanlarda yüksek duyarlılıklı kardiyak Troponin T (hs cTnT)’nin göbek kordonu ve doğum sonrası fizyolojik sınırlarına ilişkin veriler azdır. Bu çalışma sağlıklı yenidoğanlarda hs cTnT'nin normal değerlerini ve üst sınırlarını belirlemeyi amaçlamaktadır. Ek olarak, yenidoğan solunum yetmezliğinde klinik önemi ve kullanılabilirliği analiz edildi.
Yöntem: Bu invazif olmayan ve retrospektif, kesitsel çalışmada, Temmuz 2018 ile Ocak 2020 tarihleri arasında doğan 113 sağlıklı yenidoğan ve kalp dışı kaynaklı solunum yetmezliği olan 93 yenidoğan değerlendirildi. Hs cTnT, bebeklerde göbek kordonunda ve doğumdan 24-96 saat sonra ölçüldü.
Bulgular: Sağlıklı grupta umbilikal kord hs cTnT median 38 (17-156) ng/L; 99th persantil hs cTnT 122 ng/L, solunum yetmezliği grubunda umbilikal kord hs cTnT median 72 (27-326) ng/L bulundu. Sağlıklı grupta postnatal 2-4 gün hs cTnT median 75 (10-194) ng/L; 99th percentile 194 ng/L, solunum yetmezliği grubunda hs cTnT median 145 (41-409) idi. Göbek kordonu için hs cTnT ROC eğrisi AUC değeri 0.848 (cut off 64;% 95 CI; 0.79-0.90: duyarlılık % 62.4 özgüllük % 93.7), göbek kordonu hs cTnT'nin yenidoğan solunum yetmezliğinin tahmini için duyarlı bir belirteç olduğunu düşündürmektedir. Kontrol hs cTnT ROC eğrisi AUC değeri 0.851 (cut off 121.5; % 95 CI; 0.79-0.90; duyarlılık % 71 özgüllük % 86.8), kontrol hs cTnT'nin neonatal solunum yetmezliğinin tahmini için duyarlı bir belirteç olduğunu göstermektedir.
Sonuç: Sağlıklı yenidoğanlarda umbilikal kord ve postnatal hs cTnT referans aralığının, erişkin değerlerine göre yüksek olduğu saptanmıştır. Her iki hs cTnT değeri, yenidoğan solunum yetmezliği grubunda sağlıklı gruba göre çok artmıştır.

Key words: High sensitive cardiac troponin T, Umbilical cord, Healthy newborn, neonatal respiratory failure






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