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Guedalia J, Farkash R, Wasserteil N, Kasirer Y, Rottenstreich M, Unger R, Grisaru Granovsky S. Primary risk stratification for neonatal jaundice among term neonates using machine learning algorithm. Early Hum Dev 2022; 165:105538. [PMID: 35026695 DOI: 10.1016/j.earlhumdev.2022.105538] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 01/02/2022] [Accepted: 01/04/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Neonatal jaundice occurs in approximately 60% of term newborns. Although risk factors for neonatal jaundice have been studied, all the suggested strategies are based on various newborn tests for bilirubin levels. We aim to stratify neonates into risk groups for clinically significant neonatal jaundice using a combined data analysis approach, without serum bilirubin evaluation. STUDY DESIGN Term (gestational week 37-42) neonates born in a single medical center, 2005-2018 were identified. Anonymized data were analyzed using machine learning. Thresholds for stratification into risk groups were established. Associations were evaluated statistically using neonates with and without clinically significant neonatal jaundice from the study population. RESULTS A total of 147,667 consecutive term live neonates were included. The machine learning diagnostic ability to evaluate the risk for neonatal jaundice was 0.748; 95% CI 0.743-0.754 (AUC). The most important factors were (in order of importance) maternal blood type, maternal age, gestational age at delivery, estimated birth weight, parity, CBC at admission, and maternal blood pressure at admission. Neonates were then stratified by risk: 61% (n = 90,140) were classed as low-risk, 39% (n = 57,527) as higher-risk. Prevalence of jaundice was 4.14% in the full cohort, and 1.47% and 8.29% in the low- and high-risk cohorts, respectively; OR 6.06 (CI: 5.7-6.45) for neonatal jaundice in high-risk group. CONCLUSION A population tailored "first step" screening policy using machine learning model presents potential of neonatal jaundice risk stratification for term neonates. Future development and validation of this computational model are warranted.
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Affiliation(s)
- Joshua Guedalia
- The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat-Gan, Israel
| | - Rivka Farkash
- Department of Obstetrics & Gynecology, Shaare Zedek Medical Center, affiliated with the Hebrew University-Hadassah School of Medicine, Jerusalem, Israel
| | - Netanel Wasserteil
- Department of Pediatrics, Shaare Zedek Medical Center, affiliated with the Hebrew University-Hadassah School of Medicine, Jerusalem, Israel
| | - Yair Kasirer
- Department of Pediatrics, Shaare Zedek Medical Center, affiliated with the Hebrew University-Hadassah School of Medicine, Jerusalem, Israel
| | - Misgav Rottenstreich
- Department of Obstetrics & Gynecology, Shaare Zedek Medical Center, affiliated with the Hebrew University-Hadassah School of Medicine, Jerusalem, Israel.
| | - Ron Unger
- The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat-Gan, Israel
| | - Sorina Grisaru Granovsky
- Department of Obstetrics & Gynecology, Shaare Zedek Medical Center, affiliated with the Hebrew University-Hadassah School of Medicine, Jerusalem, Israel
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Guney Varal I, Mengi S, Dogan P, Tutanc M, Bostanci M, Cizmeci MN. Elevated blood carboxyhemoglobin levels as an early predictor of phototherapy requirement in moderate and late preterm infants. J Matern Fetal Neonatal Med 2019; 33:1441-1446. [PMID: 30373420 DOI: 10.1080/14767058.2018.1542675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Objective: Preterm infants are prone to increased bilirubin burden and display adverse outcomes if left unmonitored; therefore, predicting an increased bilirubin production is of paramount importance.Methods: We aimed to evaluate carboxyhemoglobin (COHb) levels in moderate (GA: 320/7-336/7) and late preterm (GA: 340/7-366/7) infants to assess whether this molecule could be used as an early predictor of phototherapy requirement.Results: A total of 221 infants were enrolled in the study. On admission, carboxyhemoglobin levels of infants who received phototherapy were significantly higher than that of infants who did not require this treatment, and this difference persisted in the consecutive hours (median (min-max): 1.2% (0.3-1.7) versus 0.8% (0.4-1.1); p < .001). The initial and consecutive COHb levels showed positive correlation (r = 0.77, p < .001). In the post-hoc analysis, direct antiglobulin test positivity significantly affected phototherapy requirement (p < .001). Receiver operating characteristics analysis showed that a COHb level of ≥0.95% was found to have a sensitivity of 90% and a specificity of 88%. Multinomial logistic regression analysis demonstrated that high COHb levels on admission significantly increased the likelihood of phototherapy requirement when adjusted for covariants (adjusted odds ratio: 2.2; 95% confidence interval: 1.4-3.5; p < .001).Conclusion: Carboxyhemoglobin measurement can be simply used to predict preterm infants who will require phototherapy.
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Affiliation(s)
- Ipek Guney Varal
- Department of Pediatrics, Division of Neonatology, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
| | - Senay Mengi
- Department of Pediatrics, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
| | - Pelin Dogan
- Department of Pediatrics, Division of Neonatology, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
| | - Murat Tutanc
- Department of Pediatrics, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
| | - Muharrem Bostanci
- Department of Pediatrics, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
| | - Mehmet N Cizmeci
- Department of Pediatrics, Division of Neonatology, Bursa Yüksek Ihtisas Teaching Hospital, Bursa, Turkey
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Bailey DGN, Fuchs H, Hentschel R. Carboxyhemoglobin - the forgotten parameter of neonatal hyperbilirubinemia. J Perinat Med 2017; 45:613-617. [PMID: 28099134 DOI: 10.1515/jpm-2016-0053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 11/29/2016] [Indexed: 11/15/2022]
Abstract
BACKGROUND Neonatal hyperbilirubinemia is influenced by a wide variety of factors, one of which is hemolysis. Serious hyperbilirubinemia may lead to a kernicterus with detrimental neurologic sequelae. Patients suffering from hemolytic disease have a higher risk of developing kernicterus. Carbon monoxide (CO), a byproduct of hemolysis or heme degradation, was described by Sjöstrand in the 1960s. It is transported as carboxyhemoglobin (COHb) and exhaled through the lungs. We were interested in a potential correlation between COHb and total serum bilirubin (TSB) and the time course of both parameters. MATERIALS AND METHODS We used a point of care (POC) blood gas analyzer and did a retrospective analysis of bilirubin and COHb data collected over a 60-day period. RESULTS An arbitrary cut-off point set at 2% COHb identified four patients with hemolytic disease of different origins who required phototherapy. In one patient with atypical hemolytic uremic syndrome (aHUS), COHb preceded the rise in bilirubin by about 2 days. Despite this displacement, there was a moderately good correlation of COHb with TSB levels <15 mg/dL (257 μmol/L) (r2: 0.80) and direct bilirubin (r2: 0.78) in the first patient. For all the four patients and all time points the correlation was slightly lower (r2: 0.59). CONCLUSIONS COHb might be useful as a marker for high hemoglobin turnover to allow an earlier identification of newborns at risk to a rapid rise in bilirubin.
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Yogev-Lifshitz M, Leibovitch L, Schushan-Eisen I, Taran C, Strauss T, Maayan-Metzger A. Indication of Mild Hemolytic Reaction Among Preterm Infants With ABO Incompatibility. Pediatr Blood Cancer 2016; 63:1050-3. [PMID: 26841084 DOI: 10.1002/pbc.25926] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Revised: 12/14/2015] [Accepted: 01/07/2016] [Indexed: 11/09/2022]
Abstract
BACKGROUND Among term infants, ABO incompatibility is a leading cause of hemolytic disease and neonatal jaundice. With respect to preterm infants, data are lacking. OBJECTIVE To evaluate the incidence and severity of ABO incompatibility hemolytic disease among preterm infants with respect to hemolytic and jaundice parameters. DESIGN Clinical and laboratory data were collected retrospectively from the medical records of 118 ABO-incompatible preterms born at gestational age (GA) 29-34 weeks, as well as 118 controls matched for GA, birth weight, and multiplicity. All infants were born at the Sheba Medical Center Tel-Hashomer between 2009 and 2012. RESULTS The study and control groups were similar on all maternal and neonatal outcome parameters. No differences between the groups were recorded throughout hospitalization regarding hematocrit levels or the need for blood transfusion. Bilirubin levels were higher among the study (ABO-incompatible) group during the first 10 days of life; however, no significant differences were found regarding the need for phototherapy. Upon evaluating subgroups divided by GA, we found no differences on any hematological and jaundice factors among preterms of 29-31 weeks, whereas among preterms of 32-34 weeks higher positive direct antiglobulin test (DAT) results (7% vs. 0% in the control, P = 0.014) as well as higher bilirubin levels were documented. CONCLUSIONS Among ABO-incompatible preterm infants with GA 29-34 weeks, there is no evidence of significant hemolytic reaction derived from placental transfer of antibodies. With increasing GA, antibody transfer becomes more significant, resulting in more positive DAT results and greater incidence of neonatal jaundice.
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Affiliation(s)
| | - Leah Leibovitch
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Department of Neonatology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Irit Schushan-Eisen
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Department of Neonatology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Camelia Taran
- Department of Neonatology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Tzipora Strauss
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Department of Neonatology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Ayala Maayan-Metzger
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Department of Neonatology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel
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Tsai MK, Wu MS, Yang CY, Lee CY, Yeh CC, Hu RH, Lee PH, Lai HS. B cells and immunoglobulin in ABO-incompatible renal transplant patients receiving rituximab and double filtration plasmapheresis. J Formos Med Assoc 2015; 114:353-8. [DOI: 10.1016/j.jfma.2012.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/27/2012] [Accepted: 12/27/2012] [Indexed: 12/18/2022] Open
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Lozar-Krivec J, Bratanic B, Paro-Panjan D. The role of carboxyhemoglobin measured with CO-oximetry in the detection of hemolysis in newborns with ABO alloimmunization. J Matern Fetal Neonatal Med 2015; 29:452-6. [PMID: 25604086 DOI: 10.3109/14767058.2015.1004050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES To evaluate carboxyhemoglobin (COHb) values measured with a CO-oximeter (Roche-cobas b 221) in jaundiced newborns with or without hemolysis and healthy controls in order to assess whether COHb measurement determined with a CO-oximeter could be used as an indicator of hemolysis in newborns with ABO alloimmunization. METHODS A total of 86 term newborn infants were prospectively studied. The study cohort consisted of three subgroups: 18 infants with ABO HDN, 21 infants with hyperbilirubinemia without hemolytic disease who required phototherapy, and 47 healthy controls. The COHb, bilirubin, and Hb levels were measured. RESULTS The three subgroups did not differ significantly with respect to birth weight, gestational age, gender, Apgar score, or mode of delivery. The ABO HDN infants had significantly higher COHb values than the healthy controls (median 2.4% versus 1.3%, p < 0.0005) and the group with hyperbilirubinemia without hemolytic disease (median 2.4% versus 1.3%, p < 0.0005), although the infants with hyperbilirubinemia without hemolytic disease did not have significantly higher COHb values compared with the healthy controls. The cut-off value of 1.7% COHb had 72% sensitivity and 97% specificity for confirming hemolysis in ABO alloimmunization. CONCLUSIONS Our data show that COHb values determined with CO-oximeters are higher in newborns with hemolysis than in those without hemolysis. COHb measured with CO-oximeters could be used to confirm hemolysis in infants with ABO alloimmunization.
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Affiliation(s)
- Jana Lozar-Krivec
- a Division of Pediatrics, Department of Neonatology , University Medical Centre Ljubljana , Ljubljana , Slovenia
| | - Borut Bratanic
- a Division of Pediatrics, Department of Neonatology , University Medical Centre Ljubljana , Ljubljana , Slovenia
| | - Darja Paro-Panjan
- a Division of Pediatrics, Department of Neonatology , University Medical Centre Ljubljana , Ljubljana , Slovenia
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Li P, Pang LH, Liang HF, Chen HY, Fan XJ. Maternal IgG Anti-A and Anti-B Titer Levels Screening in Predicting ABO Hemolytic Disease of the Newborn: A Meta-Analysis. Fetal Pediatr Pathol 2015; 34:341-50. [PMID: 26359685 DOI: 10.3109/15513815.2015.1075632] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
UNLABELLED Maternal IgG anti-A/B titers have been considered as a susceptible factor to the risk of ABO hemolytic disease in newborn (ABO-HDN). However, the results remain controversial. This meta-analysis aimed to estimate the association between maternal IgG anti-A/B titers and the risk of ABO-HDN. METHODS Trials on the relationship between maternal IgG anti-A/B titers and the risk of ABO-HDN were collected by searching Embase, PubMed, and Cochrane Central Register of Controlled Trials (CENTRAL) electronic databases. The inclusion criteria were maternal IgG anti-A/B titers screening and the evaluation of clinical outcomes in relation to ABO-HDN. Stata 12.0 was used to analyze the data. RESULTS A total of 23 trials were eligible for inclusion, of which four trials with 5,246 participants were suitable for this meta-analysis. Meta-analysis results suggested that maternal IgG anti-A/B titers were significantly associated with the risk of ABO-HDN [OR = 2.86, 95% CI = 2.50-3.28; OR = 4.67, 95% CI = 3.92-5.55; OR = 1.61, 95% CI = 1.36-1.91 in titers (128 to 256) vs. titers (64 or lower), titers (512 or higher) vs. titers (64 or lower), and titers (512 or higher) vs. titers (128-256), respectively]. CONCLUSIONS Our meta-analysis suggests that maternal IgG anti-A/B titers are significantly associated with the risk of ABO-HDN. They contribute to the prediction of risk of ABO-HDN, in addition to the need for invasive treatment for antibody titers ≥512.
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Affiliation(s)
- Ping Li
- a Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Li-Hong Pang
- a Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Hai-Feng Liang
- a Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Hong-Yan Chen
- a Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Xiao-Jing Fan
- a Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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Yoon KC, Oh HJ, Park JW, Choi J. Application of umbilical cord serum eyedrops after laser epithelial keratomileusis. Acta Ophthalmol 2013; 91:e22-8. [PMID: 22994307 DOI: 10.1111/j.1755-3768.2012.02538.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To investigate the efficacy of umbilical cord serum eyedrops after laser epithelial keratomileusis (LASEK). METHODS Sixty patients (120 eyes) with myopia who underwent LASEK were studied. Thirty-two patients (64 eyes) were treated with 20% umbilical cord serum eyedrops in combination with conventional treatment (group A), and 28 patients (56 eyes) received conventional treatment only (group B). Epithelial healing time was analysed. Visual acuity, refraction, haze score (0-4) and tear film and ocular surface parameters were evaluated at 1, 2, 4 and 12 weeks after LASEK. The concentration of transforming growth factor (TGF)-β1 in tears was measured with ELISA at 1 week after LASEK. RESULTS No significant differences in visual acuity and refraction were found between groups. The mean time to epithelial healing was 3.53 ± 1.19 days in group A and 3.91 ± 1.41 days in group B (p = 0.18). The mean haze scores at 2 and 4 weeks were 0.59 ± 0.80 and 0.31 ± 0.54 in group A and 1.06 ± 0.91 (p = 0.02) and 0.69 ± 0.78 (p = 0.03) in group B. Four and 12 weeks after LASEK, tear film break-up time was longer and keratoepitheliopathy score was lower in group A compared with group B. The mean concentration of TGF-β1 was lower in group A compared with group B (p = 0.01). CONCLUSION Application of 20% umbilical cord serum eyedrops in addition to conventional treatment after LASEK can reduce early postoperative corneal haze and improve tear film and ocular surface parameters.
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Affiliation(s)
- Kyung-Chul Yoon
- Department of Ophthalmology and Research Institute of Medical Sciences, Chonnam National University Medical School and Hospital, Gwangju, Korea.
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Kaplan M, Hammerman C, Vreman HJ, Wong RJ, Stevenson DK. Hemolysis and hyperbilirubinemia in antiglobulin positive, direct ABO blood group heterospecific neonates. J Pediatr 2010; 157:772-7. [PMID: 20598320 PMCID: PMC2951500 DOI: 10.1016/j.jpeds.2010.05.024] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2010] [Revised: 04/08/2010] [Accepted: 05/14/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE We quantified hemolysis and determined the incidence of hyperbilirubinemia in neonates who were direct antiglobulin titer (DAT)-positive, ABO heterospecific, and compared variables among O-A and O-B subgroups. STUDY DESIGN Plasma total bilirubin (PTB) was determined before the neonates were discharged from the hospital and more frequently when clinically warranted, in neonates who were DAT positive with blood group A or B and with mothers who had blood group O. Heme catabolism (and therefore bilirubin production) was indexed by blood carboxyhemoglobin corrected for inspired carbon monoxide (COHbc). Hyperbilirubinemia was defined as any PTB concentration >95th percentile on the hour-of-life-specific bilirubin nomogram. RESULTS Of 164 neonates, 111 were O-A and 53 O-B. Overall, hyperbilirubinemia developed 85 neonates (51.8%), and it tended to be more prevalent in the O-B neonates than O-A neonates (62.3% versus 46.8%; P = .053). Hyperbilirubinemia developed in more O-B newborns than O-A newborns at <24 hours (93.9% versus 48.1%; P< .0001). COHbc values were globally higher than our previously published newborn values. Babies in whom hyperbilirubinemia developed had higher COHbc values than the already high values of babies who were non-hyperbilirubinemic, and O-B newborns tended to have higher values than their O-A counterparts. CONCLUSIONS DAT-positive, ABO heterospecificity is associated with increased hemolysis and a high incidence of neonatal hyperbilirubinemia. O-B heterospecificity tends to confer even higher risk than O-A counterparts.
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Stevenson DK, Wong RJ. Metalloporphyrins in the management of neonatal hyperbilirubinemia. Semin Fetal Neonatal Med 2010; 15:164-8. [PMID: 20006567 PMCID: PMC2859976 DOI: 10.1016/j.siny.2009.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Neonatal jaundice in the first week of life is a common problem in newborns. It is due to an imbalance of bilirubin production and its elimination, which can lead to significantly elevated levels of circulating bilirubin or hyperbilirubinemia. Use of phototherapy and/or exchange transfusion are the current modes for treating neonatal hyperbilirubinemia and preventing any neurologic damage. These strategies, however, only remove bilirubin that has already been formed. Preventing the production of excess bilirubin may be a more logical approach. Synthetic heme analogs, metalloporphyrins, are competitive inhibitors of heme oxygenase, the rate-limiting enzyme in bilirubin production, and their use has been proposed as an attractive alternative strategy for preventing or treating severe hyperbilirubinemia.
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Affiliation(s)
- David K. Stevenson
- Corresponding author. Tel.: +1 650-723-5711; fax: +1 650-725-8351., (D. Stevenson)
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Watchko JF. Identification of neonates at risk for hazardous hyperbilirubinemia: emerging clinical insights. Pediatr Clin North Am 2009; 56:671-87, Table of Contents. [PMID: 19501698 DOI: 10.1016/j.pcl.2009.04.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hyperbilirubinemia is the most common condition requiring evaluation and treatment in neonates. Identifying among all newborns those few at risk to develop marked hyperbilirubinemia is a clinical challenge. Clinical, epidemiologic, and genetic risk factors associated with severe hyperbilirubinemia include late preterm gestational age, exclusive breastfeeding, glucose-6-phosphate dehydrogenase deficiency, ABO hemolytic disease, East Asian ethnicity, jaundice observed in the first 24 hours of life, cephalohematoma or significant bruising, and history of a previous sibling treated with phototherapy. It is increasingly apparent that the etiopathogenesis of severe hyperbilirubinemia is often multifactorial, and emerging evidence suggests that combining risk factor assessment with measurement of predischarge total serum or transcutaneous bilirubin levels will improve hyperbilirubinemia risk prediction.
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Affiliation(s)
- Jon F Watchko
- Department of Pediatrics, Division of Newborn Medicine, University of Pittsburgh School of Medicine, Magee-Womens Research Institute, Magee-Womens Hospital, Pittsburgh, PA 15213, USA.
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