A New Colorimetric Method for the Determination of Total Serum Bilirubin

1965 ◽  
Vol 44 (1_ts) ◽  
pp. 111-113 ◽  
Author(s):  
Patrick V. Ferro ◽  
Anna Bell Ham
Keyword(s):  
Serum Bilirubin ◽  
Colorimetric Method ◽  
Total Serum Bilirubin ◽  
Total Serum

Studies on the Use of the van den Bergh Reagent for Determination of Serum Bilirubin

1959 ◽  
Vol 5 (5) ◽  
pp. 470-478 ◽  
Author(s):  
Samuel Meites ◽  
Cecelia K Hogg
Keyword(s):  
Reaction Time ◽  
Hydrochloric Acid ◽  
Sodium Nitrite ◽  
Serum Bilirubin ◽  
Sulfanilic Acid ◽  
Total Serum Bilirubin ◽  
Total Serum ◽  
Bilirubin Concentration ◽  
Effects Of Temperature

Abstract 1. By increasing the concentration of hydrochloric acid, sulfanilic acid, and sodium nitrite in the van den Bergh reagent used for determining total serum bilirubin it is possible to increase the absorbance of azobilirubin and to accelerate its reaction time to less than 10 minutes. A modified reagent is proposed for the Malloy and Evelyn procedure. 2. The effects of temperature, urea, and protein on the coupling of serum bilirubin are discussed. 3. Hemolysis seriously affects the coupling of bilirubin. The decrease in azobilirubin production appears to vary directly with the amount of hemolysis. When the amount of hemolysis is constant, the decrease in azobilirubin production appears to vary inversely with the bilirubin concentration. The interfering effect of hemoglobin is unexplained.

Direct Spectrophotometry of Total Serum Bilirubin in the Newborn

1960 ◽  
Vol 6 (5) ◽  
pp. 421-428 ◽  
Author(s):  
Samuel Meites ◽  
Cecelia K Hogg
Keyword(s):  
Spectrophotometric Method ◽  
Phosphate Buffer ◽  
Serum Bilirubin ◽  
Wave Length ◽  
Total Serum Bilirubin ◽  
Total Serum ◽  
Direct Spectrophotometry ◽  
Similar Equation

Abstract A simple, rapid direct spectrophotometric method for the determination of total serum bilirubin on a micro basis, with a 1:21 dilution of serum in phosphate buffer, is presented for use with the Junior Coleman spectrophotometer. The formula, mg./100 ml. bilirubin = 50 A455 - 119 A575, is applied, where A represents the absorbancy at the wave length specified. The method for obtaining this or a similar equation is presented. The spectrophotometric method, when applied to sera obtained from newborns, gives apparently reliable results in the presence or absence of hemolysis. An evaluation of the method and its limitations is presented.

Two Different UGT1A1 Mutations causing Crigler–Najjar Syndrome types I and II in an Iranian Family

2015 ◽  
Vol 24 (4) ◽  
pp. 523-526 ◽  
Author(s):  
Yoshihiro Maruo ◽  
Mahdiyeh Behnam ◽  
Shinichi Ikushiro ◽  
Sayuri Nakahara ◽  
Narges Nouri ◽  
...  
Keyword(s):  
Serum Bilirubin ◽  
Total Serum Bilirubin ◽  
Total Serum ◽  
Compound Heterozygous ◽  
Type I ◽  
Syndrome Type ◽  
Type Ii ◽  
Wild Type ◽  
Iranian Family ◽  
Udp Glucuronosyltransferase

Background: Crigler–Najjar syndrome type I (CN-1) and type II (CN-2) are rare hereditary unconjugated hyperbilirubinemia disorders. However, there have been no reports regarding the co-existence of CN-1 and CN-2 in one family. We experienced a case of an Iranian family that included members with either CN-1 or CN-2. Genetic analysis revealed a mutation in the bilirubin UDP-glucuronosyltransferase (UGT1A1) gene that resulted in residual enzymatic activity.Case report: The female proband developed severe hyperbilirubinemia [total serum bilirubin concentration (TB) = 34.8 mg/dL] with bilirubin encephalopathy (kernicterus) and died after liver transplantation. Her family history included a cousin with kernicterus (TB = 30.0 mg/dL) diagnosed as CN-1. Her great grandfather (TB unknown) and uncle (TB = 23.0 mg/dL) developed jaundice, but without any treatment, they remained healthy as CN-2. Results: The affected cousin was homozygous for a novel frameshift mutation (c.381insGG, p.C127WfsX23). The affected uncle was compound heterozygous for p.C127WfsX23 and p.V225G linked with A(TA)7TAA. p.V225G-UGT1A1 reduced glucuronidation activity to 60% of wild-type. Thus, linkage of A(TA)7TAA and p.V225G might reduce UGT1A1 activity to 18%–36 % of the wild-type. Conclusion: Genetic and in vitro expression analyses are useful for accurate genetic counseling for a family with a history of both CN-1 and CN-2. Abbreviations: CN-1: Crigler–Najjar syndrome type I; CN-2: Crigler–Najjar syndrome type II; GS: Gilbert syndrome; UGT1A1: bilirubin UDP-glucuronosyltransferase; WT: Wild type; TB: total serum bilirubin.

scholarly journals Transcutaneous billirubinometry to estimate total serum bilirubin in neonatal jaundice

2017 ◽  
Vol 57 (1) ◽  
pp. 8 ◽  
Author(s):  
Andra Kurnianto ◽  
Herman Bermawi ◽  
Afifa Darmawanti ◽  
Erial Bahar
Keyword(s):  
Neonatal Jaundice ◽  
Serum Bilirubin ◽  
Subcutaneous Tissue ◽  
Correlation Coefficients ◽  
Total Serum Bilirubin ◽  
Blood Sampling ◽  
Total Serum ◽  
Transcutaneous Bilirubin ◽  
Non Invasive ◽  
Transcutaneous Bilirubinometry

Background The gold standard for diagnosis of neonatal jaundice is total serum bilirubin (TSB) measurement. This method, however, is invasive, painful, and costly in terms of workload, time, and money. Moreover, repeated blood sampling may lead to significant blood loss, which is of particular concern in preterm infants. To overcome these drawbacks, non-invasive methods of bilirubin measurement have been proposed. Transcutaneous bilirubinometry (TcB) determines the yellowness of the subcutaneous tissue of a newborn infant by measuring the difference between optical densities for light in the blue and green wavelength regions.Objective To evaluate the accuracy of transcutaneous bilirubinometry for estimating TSB levels in neonatal jaundice.Methods Subjects were infants aged < 28 days with jaundice who had never been treated with phototherapy or exchange transfusion. The study was done from February to July 2016 in Mohammad Hoesin Hospital. Subjects underwent transcutaneous bilirubin (TcB) and TSB assays, with a maximum interval of 15 minutes between tests.Results One hundred fifty patients were included in this study. The TcB values > 5 mg/dL were correlated to TSB > 5 mg/dL, with 100% sensitivity and 83.3% specificity. This cut-off point was obtained from a receiver-operator characteristic (ROC) curve with AUC 99.3% (95%CI 97.9 to 100%; P< 0.001).The correlation coefficients (r) for TSB and TcB measurements on the forehead were 0.897 (P<0.001).Conclusion Transcutaneous bilirubinometry can be used to accurately estimate TSB levels in neonatal jaundice, and may be useful in clinical practice as a non-invasive method to reduce blood sampling.

scholarly journals Development of Jaundice Detection Approaches in Neonates

2020 ◽  
Vol 22 (12) ◽  
Author(s):  
Priti Bhagat V ◽  
◽  
Dr Mukesh Raghuwanshi M ◽  
Dr. Kavita Singh ◽  
Dr Sachin Damke ◽  
...  
Keyword(s):  
Clinical Assessment ◽  
Serum Bilirubin ◽  
Visual Assessment ◽  
Assessment Methods ◽  
Total Serum Bilirubin ◽  
Total Serum ◽  
Gold Standard Method ◽  
Life Detection ◽  
Precision And Accuracy ◽  
Transcutaneous Bilirubinometer

Jaundice is one of the most common diseases that have a significant impact in the first few days of newborn life. Detection and regular monitoring of bilirubin, which is responsible for Jaundice, is an essential phase during the hyperbilirubinemia. In the literature, various clinical assessment methods of Jaundice are available. It motivates us to present a review of these clinical assessment methods in practice, along with their advantages and limitations. In this paper, we have discussed three widely used methods, such as visual assessment, total serum bilirubin and transcutaneous bilirubinometer. From the comparative analysis of these methods, it is concluded that the visual assessment is very subjective in nature, whereas, the total serum bilirubin method is still a gold standard method. The detailed analysis of the methods depicts that the correlation between this two total serum bilirubin and transcutaneous bilirubinometer has enormous potential for improvement resulting in the enhancement in precision and accuracy of bilirubin measurement.

scholarly journals Possible Ibuprofen-Induced Kernicterus in a Near-Term Infant with Moderate Hyperbilirubinemia.

2006 ◽  
Vol 11 (4) ◽  
pp. 245-250
Author(s):  
Peter Gal ◽  
J Laurence Ransom ◽  
Sherri A Davis
Keyword(s):  
Neonatal Intensive Care ◽  
Serum Bilirubin ◽  
Primary Pulmonary Hypertension ◽  
Term Infant ◽  
Auditory Neuropathy ◽  
Total Serum Bilirubin ◽  
Total Serum ◽  
Albumin Binding ◽  
Unbound Bilirubin ◽  
Near Term

A 36-week gestation newborn was admitted to the neonatal intensive care unit for treatment of primary pulmonary hypertension and possible sepsis. The infant developed hyperbilirubinemia on day 4 of life and peaked on day 5 at a total serum bilirubin of 19 mg/dL. Phototherapy was started on day 4 and continued for 5 days. On day 8 of life, ibuprofen was started for fever; a concurrent total serum bilirubin was 15.7 mg/dL. The subsequent hospital course was uneventful, and discharge occurred on day 22 of life. Because the patient failed a hearing screen at discharge, he was referred for a diagnostic audiology workup. He subsequently failed formal audiometric testing on two occasions one week apart, and was given a diagnosis of auditory dys-synchrony and/or auditory neuropathy, consistent with kernicterus. At 5½ months of age, he was reported to be hypotonic and to have frequent arching movements. Since the total serum bilirubin did not exceed 19 mg/dL, concern was raised that ibuprofen may have caused displacement of bilirubin from its albumin binding site, resulting in kernicterus due to excessive unbound bilirubin concentrations. Ibuprofen should be administered with caution in preterm infants at risk for kernicterus.

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