Rat Serum (DAG141)

Product Overview
Rat serum with 0.09% azide
Specificity
Rat serm
Nature
Native
Tag/Conjugate
Unconjugated
Procedure
None
Format
Whole serum liquid
Preservative
None
Storage
2-8°C short term, -20°C long term
Introduction
In blood, the serum is the component that is neither a blood cell (serum does not contain white or red blood cells) nor a clotting factor; it is the blood plasma not including the fibrinogens. Serum includes all proteins not used in blood clotting (coagulation) and all the electrolytes, antibodies, antigens, hormones, and any exogenous substances (e.g., drugs and microorganisms). A study of serum is serology, and may also include proteomics. Serum is used in numerous diagnostic tests, as well as blood typing.
Keywords
Serum

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References


Hypothyroidism Due to Iodine Overload in Children Receiving Peritoneal Dialysis: A Report of 4 Cases

AMERICAN JOURNAL OF KIDNEY DISEASES

Authors: Mannemuddhu, Sai Sudha; Morgans, Heather A.; Pekkucuksen, Naile Tufan; Warady, Bradley A.; Shoemaker, Lawrence R.

Children who receive peritoneal dialysis (PD) are at increased risk for thyroid dysfunction. A rarely appreciated cause is iodine overload. We report 4 children who developed iodine overload and secondary hypothyroidism. All had kidney failure treated by PD. Each previously had normal thyroid function screening test results. At the time hypothyroidism was detected, the duration of PD ranged from 1 week to 27 months (median, 6 months). Three children had high thyrotropin values and all had high serum iodine levels. The sole source of iodine exposure in each child was a povidone-iodine-impregnated gauze in the sterile transfer set cap associated with PD. Iodine overload is a poorly appreciated problem associated with the provision of PD in infants and small children and can lead to thyroid dysfunction. Increased awareness among pediatric nephrologists should lead to the development of optimal monitoring and prevention recommendations.

Sensitivity and Specificity of Serum and Synovial Fluid Markers in Diagnosis of Infection in Head-Neck Taper Corrosion of Metal-On-Polyethylene Total Hip Arthroplasty

JOURNAL OF ARTHROPLASTY

Authors: Kwon, Young-Min; Mahajan, John; Tirumala, Venkatsaiakhil; Oganesyan, Ruben; Yeo, Ingwon; Klemt, Christian

Background: The accurate diagnosis of periprosthetic joint infection (PJI) in the setting of adverse local tissue reactions in patients with metal-on-polyethylene (MoP) total hip arthroplasty (THA) secondary to head-neck taper junction corrosion is challenging as it frequently has the appearance of purulence. The aim of this study is to evaluate the utility of erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and synovial fluid markers in diagnosing PJI in failed MoP THA due to head-neck taper corrosion. Methods: A total of 89 consecutive patients with MoP THA with head-neck taper corrosion in 2 groups was evaluated: (1) infection group (n = 11) and (2) noninfection group (n = 78). All patients had highly crossed polyethylene with cobalt chromium femoral heads and had preoperative synovial fluid aspiration. In addition, serum cobalt and chromium levels were analyzed. Results: The optimal cutoff value for synovial white blood cell was 2144 with 93% sensitivity and 84% specificity. Neutrophil count optimal cutoff value was 82% with 93% sensitivity and 82% specificity. Receiver operating characteristic analysis of ESR and CRP determined optimal cutoff at 57 mm/h and 35 mg/L with 57% sensitivity and 94% specificity and 93% sensitivity and 76% specificity, respectively. There were no significant differences in metal ion levels between the infected and noninfected groups. Conclusion: The results of this study suggest that ESR and CRP are useful in excluding PJI, whereas both synovial white blood cell count and neutrophil percentage in hip aspirate are useful markers for diagnosing infection in MoP THA patients with head-neck taper corrosion associated adverse local tissue reaction. (C) 2020 Elsevier Inc. All rights reserved.

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