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Azova S, Liu E, Wolfsdorf J. Increased Use of Hyperosmolar Therapy for Suspected Clinically Apparent Brain Injury in Pediatric Patients with Diabetic Ketoacidosis during the Peak of the COVID-19 Pandemic. Pediatr Diabetes 2023; 2023:5123197. [PMID: 38050487 PMCID: PMC10695073 DOI: 10.1155/2023/5123197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/06/2023] Open
Abstract
The incidence of pediatric diabetic ketoacidosis (DKA) increased during the peak of the COVID-19 pandemic. The objective of this study was to investigate whether rates of hyperosmolar therapy administration for suspected clinically apparent brain injury (CABI) complicating DKA also increased during this period as compared to the three years immediately preceding the pandemic and to compare the characteristics of patients with suspected CABI before the pandemic, patients with suspected CABI during the peak of the pandemic, and those with DKA but without suspected CABI during the pandemic. Patients aged ≤18 years presenting with DKA before (March 11, 2017-March 10, 2020) and during the peak of the pandemic (March 11, 2020-March 10, 2021) were identified through a rigorous search of two databases. Predefined criteria were used to diagnose suspected CABI. Biochemical, clinical, and sociodemographic data were collected from a comprehensive review of the electronic medical record. The proportion of patients with DKA who received hyperosmolar therapy was significantly higher (P = 0.014) during the pandemic compared to the prepandemic period; however, this was only significant among patients with newly diagnosed diabetes. Both groups with suspected CABI had more severe acidosis, lower Glasgow Coma Scale scores, and longer hospital admissions (P< 0.001 for all) than cases without suspected CABI. During the pandemic, the blood urea nitrogen concentration was significantly higher in patients with suspected CABI than those without suspected CABI, suggesting they were more severely dehydrated. The clinical, biochemical, and sociodemographic characteristics of patients with suspected CABI were indistinguishable before and during the pandemic. In conclusion, administration of hyperosmolar therapy for suspected CABI was more common during the peak of the COVID-19 pandemic, possibly a result of delayed presentation, highlighting the need for increased awareness and early recognition of the signs and symptoms of diabetes and DKA, especially during future surges of highly transmissible infections.
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Affiliation(s)
- Svetlana Azova
- Division of Endocrinology, Boston Children’s Hospital, Boston, Massachusetts 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Enju Liu
- Institutional Centers for Clinical and Translational Research, Boston Children’s Hospital, Boston, Massachusetts 02115, USA
| | - Joseph Wolfsdorf
- Division of Endocrinology, Boston Children’s Hospital, Boston, Massachusetts 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115, USA
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Tremblay ES, Millington K, Wu Y, Wypij D, Yang Y, Agus MS, Wolfsdorf J. Utility of plasma beta-hydroxybutyrate to define resolution of diabetic ketoacidosis. Pediatr Diabetes 2022; 23:1621-1627. [PMID: 36268546 PMCID: PMC9772128 DOI: 10.1111/pedi.13437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/18/2022] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Diabetic ketoacidosis (DKA) is a common, life-threatening complication of type 1 diabetes (T1D) characterized by unregulated ketogenesis caused by relative or absolute insulin deficiency. DKA management requires frequent biochemical monitoring. Plasma ß-hydroxybutyrate (BOHB) has not been included in traditional definitions of DKA resolution. OBJECTIVE The aim of this study was to determine a cut-point level of BOHB to define DKA resolution in patients with T1D treated with intravenous (IV) insulin. SUBJECTS We identified patients with T1D receiving IV insulin for DKA treatment at a quaternary children's hospital from January 1, 2017 through December 31, 2020 who had plasma measurements of BOHB after DKA onset and whose DKA resolved by traditional laboratory criteria (venous pH (vpH) ≥ 7.3, serum bicarbonate (HCO3 ) ≥ 15 mmol/L, and/or anion gap (AG) ≤ 14 mmol/L). METHODS Associations between plasma BOHB and vpH, HCO3 , and AG were evaluated via scatterplots. Receiver operating characteristic (ROC) curves and area under the curve (AUC) were used to evaluate BOHB cut-points to predict DKA resolution. RESULTS We analyzed 403 patients with 471 unique encounters. Plasma BOHB showed the most robust relationship with AG. The ROC curve comparing plasma BOHB to the accepted definition of DKA resolution, AG ≤14 mmol/L, had an AUC of 0.92. A BOHB value of <1.5 mmol/L had a sensitivity of 83% and specificity of 87%; this cut-point correctly classified 86% of the observations. CONCLUSIONS A plasma BOHB value of <1.5 mmol/L can be used to define resolution of DKA.
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Affiliation(s)
- Elise Schlissel Tremblay
- Division of Endocrinology, Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Kate Millington
- Division of Endocrinology, Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Yunhong Wu
- Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts
| | - David Wypij
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
- Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Yufan Yang
- Feinberg School of Medicine, Northwestern University
| | - Michael S.D. Agus
- Division of Endocrinology, Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
- Division of Medical Critical Care, Boston Children’s Hospital, Boston, Massachusetts
| | - Joseph Wolfsdorf
- Division of Endocrinology, Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
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Abstract
Fanconi-Bickel syndrome (FBS) is a rare autosomal recessive disease, resulting from mutations in the SLC2A2 gene, causing impaired glucose transporter 2 protein transporter protein function, impaired glucose and galactose utilisation, hepatorenal glycogen accumulation and organ dysfunction. Clinical features include failure to thrive, hepatomegaly, rickets, short stature and delayed puberty. Therapy includes electrolyte supplementation and uncooked cornstarch. We present a 15-year-old boy diagnosed with FBS in infancy. Growth velocity was normal on standard treatment until age 8.5 years, at which time growth failure led to a diagnosis of acquired growth hormone (GH) deficiency. Initiation of recombinant human GH (rhGH) replacement of 0.25 μg/kg/week resulted in marked improvement in growth velocity and height. While short stature is expected in FBS, growth velocity that falls below the normal range despite adequate therapy should prompt further evaluation. Our case suggests that acquired GH deficiency can arise in FBS and benefits from rhGH therapy.
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Affiliation(s)
- Kevin J Scully
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Joseph Wolfsdorf
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Michael Dedekian
- Division of Pediatric Endocrinology, Maine Medical Center, Portland, Maine, USA
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Azova S, Wolfsdorf J. Precocious sexual development in a male toddler caused by unrecognized transdermal exposure to testosterone: case report and review of the literature. J Pediatr Endocrinol Metab 2021; 34:675-678. [PMID: 33660485 PMCID: PMC10653730 DOI: 10.1515/jpem-2020-0616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/22/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Exogenous exposure to transdermal testosterone is often overlooked as a cause of precocious sexual development in children. CASE PRESENTATION A 16-month-old male presented for a second opinion consultation before commencing treatment with bicalutamide and anastrozole for a presumptive diagnosis of familial gonadotropin-independent male-limited sexual precocity. Enlargement of the penis was first observed at four months of age. The initial evaluation showed isolated elevation of his plasma testosterone level; however, by 16 months, his testosterone level was prepubertal and no pathogenic variants in the LHC GR gene were identified. The history revealed that his grandfather, who had cared for him regularly in the first year of life, had used testosterone gel for treatment of hypogonadism. CONCLUSIONS Despite the 2009 "black box" warning issued by the United States Food and Drug Administration (FDA) regarding potential consequences of transdermal testosterone exposure to women and children, this continues to be an important cause of sexual precocity in children. Children are often subjected to unnecessary and costly evaluation before this exposure is recognized, underscoring the importance of obtaining a thorough medical, family, and social history tailored to the differential diagnosis.
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Affiliation(s)
- Svetlana Azova
- Division of Endocrinology, Boston Children’s Hospital, 300 Longwood Avenue, Boston, MA, 02115, USA
| | - Joseph Wolfsdorf
- Division of Endocrinology, Boston Children’s Hospital, Boston, MA, USA; and Department of Pediatrics, Harvard Medical School, Boston, MA, USA
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Azova S, Rapaport R, Wolfsdorf J. Brain injury in children with diabetic ketoacidosis: Review of the literature and a proposed pathophysiologic pathway for the development of cerebral edema. Pediatr Diabetes 2021; 22:148-160. [PMID: 33197066 PMCID: PMC10127934 DOI: 10.1111/pedi.13152] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/06/2020] [Accepted: 10/29/2020] [Indexed: 01/24/2023] Open
Abstract
Cerebral edema (CE) is a potentially devastating complication of diabetic ketoacidosis (DKA) that almost exclusively occurs in children. Since its first description in 1936, numerous risk factors have been identified; however, there continues to be uncertainty concerning the mechanisms that lead to its development. Currently, the most widely accepted hypothesis posits that CE occurs as a result of ischemia-reperfusion injury, with inflammation and impaired cerebrovascular autoregulation contributing to its pathogenesis. The role of specific aspects of DKA treatment in the development of CE continues to be controversial. This review critically examines the literature on the pathophysiology of CE and attempts to categorize the findings by types of brain injury that contribute to its development: cytotoxic, vasogenic, and osmotic. Utilizing this scheme, we propose a multifactorial pathway for the development of CE in patients with DKA.
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Affiliation(s)
- Svetlana Azova
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Robert Rapaport
- Division of Pediatric Endocrinology and Diabetes, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Joseph Wolfsdorf
- Division of Endocrinology, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA
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Gregory K, Turner D, Benjamin CN, Monthe-Dreze C, Johnson L, Hurwitz S, Wolfsdorf J, Sen S. Incorporating dextrose gel and feeding in the treatment of neonatal hypoglycaemia. Arch Dis Child Fetal Neonatal Ed 2020; 105:45-49. [PMID: 31079067 DOI: 10.1136/archdischild-2018-316430] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 03/11/2019] [Accepted: 04/09/2019] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To determine the impact of incorporating dextrose gel in the treatment of neonatal hypoglycaemia (NH) and the role of feeding type in NH outcomes. STUDY DESIGN We conducted a retrospective analysis of 2688 infants >35 weeks' gestation who were screened for NH before and after implementation of a clinical guideline for NH evaluation and treatment. We analysed the proportion of infants who required intravenous dextrose for NH before and after guideline implementation, the change in blood glucose concentrations with gel by feeding type and the odds of successful NH treatment with gel and feeding by feeding type. RESULTS Following implementation of the guideline, a lower proportion of infants required intravenous dextrose for NH treatment (8.6% (60 infants) before guideline vs. 5.6% (112 infants) after guideline (p=0.007)). The median rise in blood glucose concentration with gel administration in the entire cohort was 0.61 mmol/L (11 mg/dL) (IQR 0.28-1.06 mmol/L (5-19 mg/dL)). Blood glucose concentration of formula-fed infants rose more in response to feeding and gel than breastfed infants (p≤0.0001). Formula feeding was associated with a lower odds of recurrent hypoglycaemia, as defined by requiring a second gel, in a fully adjusted model. Specifically, in infants with a pregel blood glucose of 2.00-2.17 mmol/L (36-39 mg/dL), formula feeding with gel was associated with a lower odds of recurrent hypoglycaemia. CONCLUSIONS Dextrose gel is an effective tool in the treatment of NH. An infant's pregel blood glucose concentration may be helpful in guiding decisions around type of feeding provided.
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Affiliation(s)
- Katherine Gregory
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, MA
| | - Daria Turner
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | | | - Carmen Monthe-Dreze
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, MA
| | - Lise Johnson
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, MA
| | - Shelley Hurwitz
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, MA
| | - Joseph Wolfsdorf
- Harvard Medical School, Boston, MA.,Department of Endocrinology, Children's Hospital Boston, Boston, Massachusetts, USA
| | - Sarbattama Sen
- Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, MA
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Azova S, Wolfsdorf J. SUN-LB052 Sexual Precocity in a Male Toddler Caused by Inadvertent Prolonged Exposure to Exogenous Testosterone. J Endocr Soc 2019. [PMCID: PMC6552822 DOI: 10.1210/js.2019-sun-lb052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background: Unintentional exposure to cutaneous androgen products leading to virilization has previously been described in children, however, continues to be an overlooked cause of precocious sexual development. Clinical Case: A 16-month-old boy presented for a second opinion consultation regarding sexual precocity. Parents noticed enlargement of his penis and appearance of sparse pubic hair at about 4 months of age, prompting referral to an endocrinologist by 10 months. A comprehensive evaluation was performed. The bone age was advanced at 13-15 months and his total testosterone was 243 ng/dL (normal < 20 ng/dL). An ACTH stimulation test was negative for disorders of steroid biosynthesis. Ultrasound examination showed normal testes and no evidence of adrenal or hepatic masses. A Lupron stimulation test, performed at 14 months of age, showed a peak LH of 1.41 mIU/mL (normal < 5 mIU/mL) and peak total testosterone of 21 ng/dL (reference range ≤ 5 ng/dL). The patient was diagnosed with familial gonadotropin-independent male-limited sexual precocity, a rare condition caused by activating mutations of the LHCGR (luteinizing hormone/choriogonadotropin receptor) gene. Treatment with bicalutamide and anastrozole was prescribed. Owing to parental concern about side effects of the prescribed medications, they did not start the recommended treatment and sought a second opinion. On exam, his length was > 99th percentile for age, stretched penile length 7.5 cm (mean ± standard deviation for this age: 4.82 ± 0.44 cm), mid-shaft diameter 2 cm, and testes 2 mL bilaterally. The scrotum was thin and pendulous and there were a few pubic hairs at the base of the penis. His total testosterone was < 10 ng/dL, LH < 0.1 mIU/mL, and hCG < 0.1 mIU/mL (all normal). Ultrasound of the testes was normal. After the visit, a more thorough history was obtained from the mother. She remembered that the child’s maternal grandfather, who provided direct care to the patient in the first year of life while she attended school, used transdermal testosterone gel daily for treatment of hypogonadism. Since the grandfather’s absence after the patient’s first birthday, the child has not had any further progression of his secondary sex characteristics. On follow-up visit at 17 months of age, patient’s exam was stable. Genetic testing for mutations of the LHCGR gene was negative. Conclusion: Exogenous exposure to transdermal androgens should be kept high on the differential diagnosis for children presenting with evidence of peripheral sexual precocity as it can save patients unnecessary and costly work-up and intervention. Physicians should also be aware of their own anchoring biases, especially when evaluating patients for a second opinion of rare diagnoses. Lastly, adult endocrinologists should be mindful in counseling patients prescribed topical testosterone agents about the risk of cutaneous exposure to female partners and children.
Unless otherwise noted, all abstracts presented at ENDO are embargoed until the date and time of presentation. For oral presentations, the abstracts are embargoed until the session begins. Abstracts presented at a news conference are embargoed until the date and time of the news conference. The Endocrine Society reserves the right to lift the embargo on specific abstracts that are selected for promotion prior to or during ENDO.
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Affiliation(s)
| | - Joseph Wolfsdorf
- Endocrinology, Boston Children's Hospital, Boston, MA, United States
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Triolo TM, Fouts A, Pyle L, Yu L, Gottlieb PA, Steck AK, Greenbaum CJ, Atkinson M, Baidal D, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Clements M, Colman P, DiMeglio L, Gitelman S, Goland R, Gottlieb P, Herold K, Knip M, Krischer J, Lernmark A, Moore W, Moran A, Muir A, Palmer J, Peakman M, Philipson L, Raskin P, Redondo M, Rodriguez H, Russell W, Spain L, Schatz D, Sosenko J, Wentworth J, Wherrett D, Wilson D, Winter W, Ziegler A, Anderson M, Antinozzi P, Benoist C, Blum J, Bourcier K, Chase P, Clare-Salzler M, Clynes R, Eisenbarth G, Fathman C, Grave G, Hering B, Insel R, Kaufman F, Kay T, Leschek E, Mahon J, Marks J, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Pugliese A, Roep B, Roncarolo M, Savage P, Simell O, Sherwin R, Siegelman M, Skyler J, Steck A, Thomas J, Trucco M, Wagner J, Krischer JP, Leschek E, Rafkin L, Bourcier K, Cowie C, Foulkes M, Insel R, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Rafkin L, Sosenko JM, Kenyon NS, Santiago I, Krischer JP, Bundy B, Abbondondolo M, Dixit S, Pasha M, King K, Adcock H, Atterberry L, Fox K, Englert N, Mauras J, Permuy K, Sikes T, Adams T, Berhe B, Guendling L, McLennan L, Paganessi C, Murphy M, Draznin M, Kamboj S, Sheppard V, Lewis L, Coates W, Amado D, Moore G, Babar J, Bedard D, Brenson-Hughes J, Cernich M, Clements R, Duprau S, Goodman L, Hester L, Huerta-Saenz A, Asif I, Karmazin T, Letjen S, Raman D, Morin W, Bestermann E, Morawski J, White A, Brockmyer R, Bays S, Campbell A, Boonstra M, Stapleton N, Stone A, Donoho H, Everett H, Hensley M, Johnson C, Marshall N, Skirvin P, Taylor R, Williams L, Burroughs C, Ray C, Wolverton D, Nickels C, Dothard P, Speiser M, Pellizzari L, Bokor K, Izuora S, Abdelnour P, Cummings S, Cuthbertson D, Paynor M, Leahy M, Riedl S, Shockley R, Saad T, Briones S, Casella C, Herz K, Walsh J, Greening F, Deemer M, Hay S, Hunt N, Sikotra L, Simons D, Karounos R, Oremus L, Dye L, Myers D, Ballard W, Miers R, Eberhard C, Sparks K, Thraikill K, Edwards J, Fowlkes S, Kemp A, Morales L, Holland L, Johnson P, Paul A, Ghatak K, Fiske S, Phelen H, Leyland T, Henderson D, Brenner E, Oppenheimer I, Mamkin C, Moniz C, Clarson M, Lovell A, Peters V, Ford J, Ruelas D, Borut D, Burt M, Jordan S, Castilla P, Flores M, Ruiz L, Hanson J, Green-Blair R, Sheridan K, Garmeson J, Wintergerst G, Pierce A, Omoruyi M, Foster S, Kingery A, Lunsford I, Cervantes T, Parker P, Price J, Urben I, Guillette H, Doughty H, Haydock V, Parker P, Bergman S, Duncum C, Rodda A, Perelman R, Calendo C, Barrera E, Arce-Nunez Y, Geyer S, Martinez M, De la Portilla I, Cardenas L, Garrido M, Villar R, Lorini E, Calandra G, D’Annuzio K, Perri N, Minuto C, Hays B, Rebora R, Callegari O, Ali J, Kramer B, Auble S, Cabrera P, Donohoue R, Fiallo-Scharer M, Hessner P, Wolfgram A, Henderson C, Kansra N, Bettin R, McCuller A, Miller S, Accacha J, Corrigan E, Fiore R, Levine T, Mahoney C, Polychronakos V, Henry M, Gagne H, Starkman M, Fox D, Chin F, Melchionne L, Silverman I, Marshall L, Cerracchio J, Cruz A, Viswanathan J, Heyman K, Wilson S, Chalew S, Valley S, Layburn A, Lala P, Clesi M, Genet G, Uwaifo A, Charron T, Allerton W, Hsiao B, Cefalu L, Melendez-Ramirez R, Richards C, Alleyn E, Gustafson M, Lizanna J, Wahlen S, Aleiwe M, Hansen H, Wahlen C, Karges C, Levy A, Bonaccorso R, Rapaport Y, Tomer D, Chia M, Goldis L, Iazzetti M, Klein C, Levister L, Waldman E, Keaton N, Wallach M, Regelmann Z, Antal M, Aranda C, Reynholds A, Vinik P, Barlow M, Bourcier M, Nevoret J, Couper S, Kinderman A, Beresford N, Thalagne H, Roper J, Gibbons J, Hill S, Balleaut C, Brennan J, Ellis-Gage L, Fear T, Gray L, Law P, Jones C, McNerney L, Pointer N, Price K, Few D, Tomlinson N, Leech D, Wake C, Owens M, Burns J, Leinbach A, Wotherspoon A, Murray K, Short G, Curry S, Kelsey J, Lawson J, Porter S, Stevens E, Thomson S, Winship L, Liu S, Wynn E, Wiltshire J, Krebs P, Cresswell H, Faherty C, Ross L, Denvir J, Drew T, Randell P, Mansell S, Lloyd J, Bell S, Butler Y, Hooton H, Navarra A, Roper G, Babington L, Crate H, Cripps A, Ledlie C, Moulds R, Malloy J, Norton B, Petrova O, Silkstone C, Smith K, Ghai M, Murray V, Viswanathan M, Henegan O, Kawadry J, Olson L, Maddox K, Patterson T, Ahmad B, Flores D, Domek S, Domek K, Copeland M, George J, Less T, Davis M, Short A, Martin J, Dwarakanathan P, O’Donnell B, Boerner L, Larson M, Phillips M, Rendell K, Larson C, Smith K, Zebrowski L, Kuechenmeister M, Miller J, Thevarayapillai M, Daniels H, Speer N, Forghani R, Quintana C, Reh A, Bhangoo P, Desrosiers L, Ireland T, Misla C, Milliot E, Torres S, Wells J, Villar M, Yu D, Berry D, Cook J, Soder A, Powell M, Ng M, Morrison Z, Moore M, Haslam M, Lawson B, Bradley J, Courtney C, Richardson C, Watson E, Keely D, DeCurtis M, Vaccarcello-Cruz Z, Torres K, Muller S, Sandberg H, Hsiang B, Joy D, McCormick A, Powell H, Jones J, Bell S, Hargadon S, Hudson M, Kummer S, Nguyen T, Sauder E, Sutton K, Gensel R, Aguirre-Castaneda V, Benavides, Lopez D, Hemp S, Allen J, Stear E, Davis T, O’Donnell R, Jones A, Roberts J, Dart N, Paramalingam L, Levitt Katz N, Chaudhary K, Murphy S, Willi B, Schwartzman C, Kapadia D, Roberts A, Larson D, McClellan G, Shaibai L, Kelley G, Villa C, Kelley R, Diamond M, Kabbani T, Dajani F, Hoekstra M, Sadler K, Magorno J, Holst V, Chauhan N, Wilson P, Bononi M, Sperl A, Millward M, Eaton L, Dean J, Olshan H, Stavros T, Renna C, Milliard, Brodksy L, Bacon J, Quintos L, Topor S, Bialo B, Bancroft A, Soto W, Lagarde H, Tamura R, Lockemer T, Vanderploeg M, Ibrahim M, Huie V, Sanchez R, Edelen R, Marchiando J, Palmer T, Repas M, Wasson P, Wood K, Auker J, Culbertson T, Kieffer D, Voorhees T, Borgwardt L, DeRaad K, Eckert E, Isaacson H, Kuhn A, Carroll M, Xu P, Schubert G, Francis S, Hagan T, Le M, Penn E, Wickham C, Leyva K, Rivera J, Padilla I, Rodriguez N, Young K, Jospe J, Czyzyk B, Johnson U, Nadgir N, Marlen G, Prakasam C, Rieger N, Glaser E, Heiser B, Harris C, Alies P, Foster H, Slater K, Wheeler D, Donaldson M, Murray D, Hale R, Tragus D, Word J, Lynch L, Pankratz W, Badias F, Rogers R, Newfield S, Holland M, Hashiguchi M, Gottschalk A, Philis-Tsimikas R, Rosal S, Franklin S, Guardado N, Bohannon M, Baker A, Garcia T, Aguinaldo J, Phan V, Barraza D, Cohen J, Pinsker U, Khan J, Wiley L, Jovanovic P, Misra M, Bassi M, Wright D, Cohen K, Huang M, Skiles S, Maxcy C, Pihoker K, Cochrane J, Fosse S, Kearns M, Klingsheim N, Beam C, Wright L, Viles H, Smith S, Heller M, Cunningham A, Daniels L, Zeiden J, Field R, Walker K, Griffin L, Boulware D, Bartholow C, Erickson J, Howard B, Krabbenhoft C, Sandman A, Vanveldhuizen J, Wurlger A, Zimmerman K, Hanisch L, Davis-Keppen A, Bounmananh L, Cotterill J, Kirby M, Harris A, Schmidt C, Kishiyama C, Flores J, Milton W, Martin C, Whysham A, Yerka T, Bream S, Freels J, Hassing J, Webster R, Green P, Carter J, Galloway D, Hoelzer S, Roberts S, Said P, Sullivan H, Freeman D, Allen E, Reiter E, Feinberg C, Johnson L, Newhook D, Hagerty N, White L, Levandoski J, Kyllo M, Johnson C, Gough J, Benoit P, Iyer F, Diamond H, Hosono S, Jackman L, Barette P, Jones I, Sills S, Bzdick J, Bulger R, Ginem J, Weinstock I, Douek R, Andrews G, Modgill G, Gyorffy L, Robin N, Vaidya S, Crouch K, O’Brien C, Thompson N, Granger M, Thorne J, Blumer J, Kalic L, Klepek J, Paulett B, Rosolowski J, Horner M, Watkins J, Casey K, Carpenter C, Michelle Kieffer MH, Burns J, Horton C, Pritchard D, Soetaert A, Wynne C, Chin O, Molina C, Patel R, Senguttuvan M, Wheeler O, Lane P, Furet C, Steuhm D, Jelley S, Goudeau L, Chalmers D, Greer C, Panagiotopoulos D, Metzger D, Nguyen M, Horowitz M, Linton C, Christiansen E, Glades C, Morimoto M, Macarewich R, Norman K, Patin C, Vargas A, Barbanica A, Yu P, Vaidyanathan W, Nallamshetty L, Osborne R, Mehra S, Kaster S, Neace J, Horner G, Reeves C, Cordrey L, Marrs T, Miller S, Dowshen D, Oduah V, Doyle S, Walker D, Catte H, Dean M, Drury-Brown B, Hackman M, Lee S, Malkani K, 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Frank E, Liu J, Perry J, Pyle R, Rigby A, Riley K, Soto A, Gitelman S, Adi S, Anderson M, Berhel A, Breen K, Fraser K, Gerard-Gonzalez A, Jossan P, Lustig R, Moassesfar S, Mugg A, Ng D, Prahalod P, Rangel-Lugo M, Sanda S, Tarkoff J, Torok C, Wesch R, Aslan I, Buchanan J, Cordier J, Hamilton C, Hawkins L, Ho T, Jain A, Ko K, Lee T, Phelps S, Rosenthal S, Sahakitrungruang T, Stehl L, Taylor L, Wertz M, Wong J, Philipson L, Briars R, Devine N, Littlejohn E, Grant T, Gottlieb P, Klingensmith G, Steck A, Alkanani A, Bautista K, Bedoy R, Blau A, Burke B, Cory L, Dang M, Fitzgerald-Miller L, Fouts A, Gage V, Garg S, Gesauldo P, Gutin R, Hayes C, Hoffman M, Ketchum K, Logsden-Sackett N, Maahs D, Messer L, Meyers L, Michels A, Peacock S, Rewers M, Rodriguez P, Sepulbeda F, Sippl R, Steck A, Taki I, Tran BK, Tran T, Wadwa RP, Zeitler P, Barker J, Barry S, Birks L, Bomsburger L, Bookert T, Briggs L, Burdick P, Cabrera R, Chase P, Cobry E, Conley A, Cook G, Daniels J, DiDomenico D, Eckert J, Ehler A, Eisenbarth G, Fain P, Fiallo-Scharer R, Frank N, Goettle H, Haarhues M, Harris S, Horton L, Hutton J, Jeffrrey J, Jenison R, Jones K, Kastelic W, King MA, Lehr D, Lungaro J, Mason K, Maurer H, Nguyen L, Proto A, Realsen J, Schmitt K, Schwartz M, Skovgaard S, Smith J, Vanderwel B, Voelmle M, Wagner R, Wallace A, Walravens P, Weiner L, Westerhoff B, Westfall E, Widmer K, Wright H, Schatz D, Abraham A, Atkinson M, Cintron M, Clare-Salzler M, Ferguson J, Haller M, Hosford J, Mancini D, Rohrs H, Silverstein J, Thomas J, Winter W, Cole G, Cook R, Coy R, Hicks E, Lewis N, Marks J, Pugliese A, Blaschke C, Matheson D, Pugliese A, Sanders-Branca N, Ray Arce LA, Cisneros M, Sabbag S, Moran A, Gibson C, Fife B, Hering B, Kwong C, Leschyshyn J, Nathan B, Pappenfus B, Street A, Boes MA, Peterson Eck S, Finney L, Albright Fischer T, Martin A, Jacqueline Muzamhindo C, Rhodes M, Smith J, Wagner J, Wood B, Becker D, Delallo K, Diaz A, Elnyczky B, Libman I, Pasek B, Riley K, Trucco M, Copemen B, Gwynn D, Toledo F, Rodriguez H, Bollepalli S, Diamond F, Eyth E, Henson D, Lenz A, Shulman D, Raskin P, Adhikari S, Dickson B, Dunnigan E, Lingvay I, Pruneda L, Ramos-Roman M, Raskin P, Rhee C, Richard J, Siegelman M, Sturges D, Sumpter K, White P, Alford M, Arthur J, Aviles-Santa ML, Cordova E, Davis R, Fernandez S, Fordan S, Hardin T, Jacobs A, Kaloyanova P, Lukacova-Zib I, Mirfakhraee S, Mohan A, Noto H, Smith O, Torres N, Wherrett D, Balmer D, Eisel L, Kovalakovska R, Mehan M, Sultan F, Ahenkorah B, Cevallos J, Razack N, Jo Ricci M, Rhode A, Srikandarajah M, Steger R, Russell WE, Black M, Brendle F, Brown A, Moore D, Pittel E, Robertson A, Shannon A, Thomas JW, Herold K, Feldman L, Sherwin R, Tamborlane W, Weinzimer S, Toppari J, Kallio T, Kärkkäinen M, Mäntymäki E, Niininen T, Nurmi B, Rajala P, Romo M, Suomenrinne S, Näntö-Salonen K, Simell O, Simell T, Bosi E, Battaglia M, Bianconi E, Bonfanti R, Grogan P, Laurenzi A, Martinenghi S, Meschi F, Pastore M, Falqui L, Teresa Muscato M, Viscardi M, Bingley P, Castleden H, Farthing N, Loud S, Matthews C, McGhee J, Morgan A, Pollitt J, Elliot-Jones R, Wheaton C, Knip M, Siljander H, Suomalainen H, Colman P, Healy F, Mesfin S, Redl L, Wentworth J, Willis J, Farley M, Harrison L, Perry C, Williams F, Mayo A, Paxton J, Thompson V, Volin L, Fenton C, Carr L, Lemon E, Swank M, Luidens M, Salgam M, Sharma V, Schade D, King C, Carano R, Heiden J, Means N, Holman L, Thomas I, Madrigal D, Muth T, Martin C, Plunkett C, Ramm C, Auchus R, Lane W, Avots E, Buford M, Hale C, Hoyle J, Lane B, Muir A, Shuler S, Raviele N, Ivie E, Jenkins M, Lindsley K, Hansen I, Fadoju D, Felner E, Bode B, Hosey R, Sax J, Jefferies C, Mannering S, Prentis R, She J, Stachura M, Hopkins D, Williams J, Steed L, Asatapova E, Nunez S, Knight S, Dixon P, Ching J, Donner T, Longnecker S, Abel K, Arcara K, Blackman S, Clark L, Cooke D, Plotnick L, Levin P, Bromberger L, Klein K, Sadurska K, Allen C, Michaud D, Snodgrass H, Burghen G, Chatha S, Clark C, Silverberg J, Wittmer C, Gardner J, LeBoeuf C, Bell P, McGlore O, Tennet H, Alba N, Carroll M, Baert L, Beaton H, Cordell E, Haynes A, Reed C, Lichter K, McCarthy P, McCarthy S, Monchamp T, Roach J, Manies S, Gunville F, Marosok L, Nelson T, Ackerman K, Rudolph J, Stewart M, McCormick K, May S, Falls T, Barrett T, Dale K, Makusha L, McTernana C, Penny-Thomas K, Sullivan K, Narendran P, Robbie J, Smith D, Christensen R, Koehler B, Royal C, Arthur T, Houser H, Renaldi J, Watsen S, Wu P, Lyons L, House B, Yu J, Holt H, Nation M, Vickers C, Watling R, Heptulla R, Trast J, Agarwal C, Newell D, Katikaneni R, Gardner C, Del A, Rio A, Logan H, Collier C, Rishton G, Whalley A, Ali S, Ramtoola T, Quattrin L, Mastrandea A, House M, Ecker C, Huang C, Gougeon J, Ho D, Pacuad D, Dunger J, May C, O’Brien C, Acerini B, Salgin A, Thankamony R, Williams J, Buse G, Fuller M, Duclos J, Tricome H, Brown D, Pittard D, Bowlby A, Blue T, Headley S, Bendre K, Lewis K, Sutphin C, Soloranzo J, Puskaric H, Madison M, Rincon M, Carlucci R, Shridharani B, Rusk E, Tessman D, Huffman H, Abrams B, Biederman M, Jones V, Leathers W, Brickman P, Petrie D, Zimmerman J, Howard L, Miller R, Alemzadeh D, Mihailescu R, Melgozza-Walker N, Abdulla C, Boucher-Berry D, Ize-Ludlow R, Levy C, Swenson, Brousell N, Crimmins D, Edler T, Weis C, Schultz D, Rogers D, Latham C, Mawhorter C, Switzer W, Spencer P, Konstantnopoulus S, Broder J, Klein L, Knight L, Szadek G, Welnick B, Thompson R, Hoffman A, Revell J, Cherko K, Carter E, Gilson J, Haines G, Arthur B, Bowen W, Zipf P, Graves R, Lozano D, Seiple K, Spicer A, Chang J, Fregosi J, Harbinson C, Paulson S, Stalters P, Wright D, Zlock A, Freeth J, Victory H, Maheshwari A, Maheshwari T, Holmstrom J, Bueno R, Arguello J, Ahern L, Noreika V, Watson S, Hourse P, Breyer C, Kissel Y, Nicholson M, Pfeifer S, Almazan J, Bajaj M, Quinn K, Funk J, McCance E, Moreno R, Veintimilla A, Wells J, Cook S, Trunnel J, Henske S, Desai K, Frizelis F, Khan R, Sjoberg K, Allen P, Manning G, Hendry B, Taylor S, Jones W, Strader M, Bencomo T, Bailey L, Bedolla C, Roldan C, Moudiotis B, Vaidya C, Anning S, Bunce S, Estcourt E, Folland E, Gordon C, Harrill J, Ireland J, Piper L, Scaife K, Sutton S, Wilkins M, Costelloe J, Palmer L, Casas C, Miller M, Burgard C, Erickson J, Hallanger-Johnson P, Clark W, Taylor A, Lafferty S, Gillett C, Nolan M, Pathak L, Sondrol T, Hjelle S, Hafner J, Kotrba R, Hendrickson A, Cemeroglu T, Symington M, Daniel Y, Appiagyei-Dankah D, Postellon M, Racine L, Kleis K, Barnes S, Godwin H, McCullough K, Shaheen G, Buck L, Noel M, Warren S, Weber S, Parker I, Gillespie B, Nelson C, Frost J, Amrhein E, Moreland A, Hayes J, Peggram J, Aisenberg M, Riordan J, Zasa E, Cummings K, Scott T, Pinto A, Mokashi K, McAssey E, Helden P, Hammond L, Dinning S, Rahman S, Ray C, Dimicri S, Guppy H, Nielsen C, Vogel C, Ariza L, Morales Y, Chang R, Gabbay L, Ambrocio L, Manley R, Nemery W, Charlton P, Smith L, Kerr B, Steindel-Kopp M, Alamaguer D, Liljenquist G, Browning T, Coughenour M, Sulk E, Tsalikan M, Tansey J, Cabbage N. Identical and Nonidentical Twins: Risk and Factors Involved in Development of Islet Autoimmunity and Type 1 Diabetes. Diabetes Care 2019; 42:192-199. [PMID: 30061316 PMCID: PMC6341285 DOI: 10.2337/dc18-0288] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/28/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE There are variable reports of risk of concordance for progression to islet autoantibodies and type 1 diabetes in identical twins after one twin is diagnosed. We examined development of positive autoantibodies and type 1 diabetes and the effects of genetic factors and common environment on autoantibody positivity in identical twins, nonidentical twins, and full siblings. RESEARCH DESIGN AND METHODS Subjects from the TrialNet Pathway to Prevention Study (N = 48,026) were screened from 2004 to 2015 for islet autoantibodies (GAD antibody [GADA], insulinoma-associated antigen 2 [IA-2A], and autoantibodies against insulin [IAA]). Of these subjects, 17,226 (157 identical twins, 283 nonidentical twins, and 16,786 full siblings) were followed for autoantibody positivity or type 1 diabetes for a median of 2.1 years. RESULTS At screening, identical twins were more likely to have positive GADA, IA-2A, and IAA than nonidentical twins or full siblings (all P < 0.0001). Younger age, male sex, and genetic factors were significant factors for expression of IA-2A, IAA, one or more positive autoantibodies, and two or more positive autoantibodies (all P ≤ 0.03). Initially autoantibody-positive identical twins had a 69% risk of diabetes by 3 years compared with 1.5% for initially autoantibody-negative identical twins. In nonidentical twins, type 1 diabetes risk by 3 years was 72% for initially multiple autoantibody-positive, 13% for single autoantibody-positive, and 0% for initially autoantibody-negative nonidentical twins. Full siblings had a 3-year type 1 diabetes risk of 47% for multiple autoantibody-positive, 12% for single autoantibody-positive, and 0.5% for initially autoantibody-negative subjects. CONCLUSIONS Risk of type 1 diabetes at 3 years is high for initially multiple and single autoantibody-positive identical twins and multiple autoantibody-positive nonidentical twins. Genetic predisposition, age, and male sex are significant risk factors for development of positive autoantibodies in twins.
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Affiliation(s)
- Taylor M. Triolo
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Alexandra Fouts
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Laura Pyle
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Liping Yu
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Peter A. Gottlieb
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Andrea K. Steck
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
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Goss PW, Middlehurst A, Acerini CL, Anderson BJ, Bratina N, Brink S, Calliari L, Forsander G, Goss JL, Maahs D, Milosevic R, Pacaud D, Paterson MA, Pitman L, Rowley E, Wolfsdorf J. ISPAD Position Statement on Type 1 Diabetes in Schools. Pediatr Diabetes 2018; 19:1338-1341. [PMID: 30295419 DOI: 10.1111/pedi.12781] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Shridharani R, Rusk B, Tessman E, Huffman D, Abrams H, Biederman B, Jones M, Leathers V, Brickman W, Petrie P, Zimmerman D, Howard J, Miller L, Alemzadeh R, Mihailescu D, Melgozza-Walker R, Abdulla N, Boucher-Berry C, Ize-Ludlow D, Levy R, Swenson Brousell C, Scott R, Heenan H, Lunt H, Kendall D, Willis J, Darlow B, Crimmins N, Edler D, Weis T, Schultz C, Rogers D, Latham D, Mawhorter C, Switzer C, Spencer W, Konstantnopoulus P, Broder S, Klein J, Bachrach B, Gardner M, Eichelberger D, Knight L, Szadek L, Welnick G, Thompson B, Hoffman R, Revell A, Cherko J, Carter K, Gilson E, Haines J, Arthur G, Bowen B, Zipf W, Graves P, Lozano R, Seiple D, Spicer K, Chang A, Fregosi J, Harbinson J, Paulson C, Stalters S, Wright P, Zlock D, Freeth A, Victory J, Maheshwari H, Maheshwari A, Holmstrom T, Bueno J, Arguello R, Ahern J, Noreika L, Watson V, Hourse S, Breyer P, Kissel C, Nicholson Y, Pfeifer M, Almazan S, Bajaj J, Quinn M, Funk K, McCance J, Moreno E, Veintimilla R, Wells A, Cook J, Trunnel S, Transue D, Surhigh J, Bezzaire D, Moltz K, Zacharski E, Henske J, Desai S, Frizelis K, Khan F, Sjoberg R, Allen K, Manning P, Hendry G, Taylor B, Jones S, Couch R, Danchak R, Lieberman D, Strader W, Bencomo M, Bailey T, Bedolla L, Roldan C, Moudiotis C, Vaidya B, Anning C, Bunce S, Estcourt S, Folland E, Gordon E, Harrill C, Ireland J, Piper J, Scaife L, Sutton K, Wilkins S, Costelloe M, Palmer J, Casas L, Miller C, Burgard M, Erickson C, Hallanger-Johnson J, Clark P, Taylor W, Galgani J, Banerjee S, Banda C, McEowen D, Kinman R, Lafferty A, Gillett S, Nolan C, Pathak M, Sondrol L, Hjelle T, Hafner S, Kotrba J, Hendrickson R, Cemeroglu A, Symington T, Daniel M, Appiagyei-Dankah Y, Postellon D, Racine M, Kleis L, Barnes K, Godwin S, McCullough H, Shaheen K, Buck G, Noel L, Warren M, Weber S, Parker S, Gillespie I, Nelson B, Frost C, Amrhein J, Moreland E, Hayes A, Peggram J, Aisenberg J, Riordan M, Zasa J, Cummings E, Scott K, Pinto T, Mokashi A, McAssey K, Helden E, Hammond P, Dinning L, Rahman S, Ray S, Dimicri C, Guppy S, Nielsen H, Vogel C, Ariza C, Morales L, Chang Y, Gabbay R, Ambrocio L, Manley L, Nemery R, Charlton W, Smith P, Kerr L, Steindel-Kopp B, Alamaguer M, Tabisola-Nuesca E, Pendersen A, Larson N, Cooper-Olviver H, Chan D, Fitz-Patrick D, Carreira T, Park Y, Ruhaak R, Liljenquist D. A Type 1 Diabetes Genetic Risk Score Predicts Progression of Islet Autoimmunity and Development of Type 1 Diabetes in Individuals at Risk. Diabetes Care 2018; 41:1887-1894. [PMID: 30002199 PMCID: PMC6105323 DOI: 10.2337/dc18-0087] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 06/06/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We tested the ability of a type 1 diabetes (T1D) genetic risk score (GRS) to predict progression of islet autoimmunity and T1D in at-risk individuals. RESEARCH DESIGN AND METHODS We studied the 1,244 TrialNet Pathway to Prevention study participants (T1D patients' relatives without diabetes and with one or more positive autoantibodies) who were genotyped with Illumina ImmunoChip (median [range] age at initial autoantibody determination 11.1 years [1.2-51.8], 48% male, 80.5% non-Hispanic white, median follow-up 5.4 years). Of 291 participants with a single positive autoantibody at screening, 157 converted to multiple autoantibody positivity and 55 developed diabetes. Of 953 participants with multiple positive autoantibodies at screening, 419 developed diabetes. We calculated the T1D GRS from 30 T1D-associated single nucleotide polymorphisms. We used multivariable Cox regression models, time-dependent receiver operating characteristic curves, and area under the curve (AUC) measures to evaluate prognostic utility of T1D GRS, age, sex, Diabetes Prevention Trial-Type 1 (DPT-1) Risk Score, positive autoantibody number or type, HLA DR3/DR4-DQ8 status, and race/ethnicity. We used recursive partitioning analyses to identify cut points in continuous variables. RESULTS Higher T1D GRS significantly increased the rate of progression to T1D adjusting for DPT-1 Risk Score, age, number of positive autoantibodies, sex, and ethnicity (hazard ratio [HR] 1.29 for a 0.05 increase, 95% CI 1.06-1.6; P = 0.011). Progression to T1D was best predicted by a combined model with GRS, number of positive autoantibodies, DPT-1 Risk Score, and age (7-year time-integrated AUC = 0.79, 5-year AUC = 0.73). Higher GRS was significantly associated with increased progression rate from single to multiple positive autoantibodies after adjusting for age, autoantibody type, ethnicity, and sex (HR 2.27 for GRS >0.295, 95% CI 1.47-3.51; P = 0.0002). CONCLUSIONS The T1D GRS independently predicts progression to T1D and improves prediction along T1D stages in autoantibody-positive relatives.
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Affiliation(s)
- Maria J. Redondo
- Texas Children’s Hospital, Baylor College of Medicine, Houston, TX
| | | | - Andrea K. Steck
- Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Seth Sharp
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | - John M. Wentworth
- Walter and Eliza Hall Institute of Medical Research and Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Michael N. Weedon
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | | | | | | | | | - Richard A. Oram
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
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DuBose SN, Hermann JM, Tamborlane WV, Beck RW, Dost A, DiMeglio LA, Schwab KO, Holl RW, Hofer SE, Maahs DM, Lipman T, Calvano T, Kucheruk O, Minnock P, Nguyen C, Klingensmith G, Banion C, Barker J, Cain C, Chase P, Hoops S, Kelsy M, Klingensmith G, Maahs D, Mowry C, Nadeau K, Raymond J, Rewers M, Rewers A, Slover R, Steck A, Wadwa P, Walravens P, Zeitler P, Haro H, Manseau K, Weinstock R, Izquierdo R, Sheikh U, Conboy P, Bulger J, Bzdick S, Goland R, Gandica R, Weiner L, Cook S, Greenberg E, Kohm K, Pollack S, Lee J, Gregg B, Tan M, Burgh K, Eason A, Garg S, Michels A, Myers L, DiMeglio L, Hannon T, Orr D, Cruz C, Woerner S, Wolfsdorf J, Quinn M, Tawa O, Ahmann A, Castle J, Joarder F, Bogan C, Cady N, Cox J, Pitts A, Fitch R, White B, Wollam B, Bode B, Lindmark K, Hosey R, Bethin K, Quattrin T, Ecker M, Wood J, Chao L, Cheung C, Fisher L, Jeandron D, Kaufman F, Kim M, Miyazaki B, Monzavi R, Patel P, Pitukcheewanont P, Sandstrom A, Cohen M, Ichihara B, Lipton M, Cemeroglu A, Appiagyei-Dankah Y, Daniel M, Postellon D, Racine M, Wood M, Kleis L, Hirsch I, DeSantis A, Dugdale D, Failor RA, Gilliam L, Greenbaum C, Janci M, Odegard P, Trence D, Wisse B, Batts E, Dove A, Hefty D, Khakpour D, Klein J, Kuhns K, McCulloch-Olson M, Peterson C, Ramey M, Marie MS, Thomson P, Webber C, Liljenquist D, Sulik M, Vance C, Coughenour T, Brown C, Halford J, Prudent A, Rigby S, Robison B, Starkman H, Berry T, Cerame B, Chin D, Ebner-Lyon L, Guevarra F, Sabanosh K, Silverman L, Wagner C, Fox M, Buckingham B, Shah A, Caswell K, Harris B, Bergenstal R, Criego A, Damberg G, Matfin G, Powers M, Tridgell D, Burt C, Olson B, Thomas L, Mehta S, Katz M, Laffel L, Hathway J, Phillips R, Cengiz E, Tamborlane W, Cappiello D, Steffen A, Zgorski M, Peters A, Ruelas V, Benjamin R, Adkins D, Cuffee J, Spruill A, Bergenstal R, Criego A, Damberg G, Matfin G, Powers M, Tridgell D, Burt C, Olson B, Thomas L, Aleppo-Kacmarek G, Derby T, Massaro E, Webb K, Burt Solorzano C, DeBoer M, Madison H, McGill J, Buechler L, Clifton MJ, Hurst S, Kissel S, Recklein C, Tsalikian E, Tansey M, Cabbage J, Coffey J, Salamati S, Clements M, Raman S, Turpin A, Bedard J, Cohoon C, Elrod A, Fridlington A, Hester L, Kruger D, Schatz D, Clare-Salzler M, Cusi K, Digman C, Fudge B, Haller M, Meehan C, Rohrs H, Silverstein J, Wagh S, Cintron M, Sheehan E, Thomas J, Daniels M, Clark S, Flannery T, Forghani N, Naidu A, Reh C, Scoggin P, Trinh L, Ayala N, Quintana R, Speer H, Zipf W, Seiple D, Kittelsrud J, Gupta A, Peterson V, Stoker A, Gottschalk M, Hashiguchi M, Smith K, Rodriguez H, Bobik C, Henson D, Simmons J, Potter A, Black M, Brendle F, Gubitosi-Klug R, Kaminski B, Bergant S, Campbell W, Tasi C, Copeland K, Beck J, Less J, Schanuel J, Tolbert J, Adi S, Gerard-Gonzalez A, Gitelman S, Chettout N, Torok C, Pihoker C, Yi-Frazier J, Kearns S, Libman I, Bills V, Diaz A, Duke J, Nathan B, Moran A, Bellin M, Beasley S, Kogler A, Leschyshyn J, Schmid K, Street A, Nelson B, Frost C, Reifeis E, Haymond M, Bacha F, Caldas-Vasquez M, Klinepeter S, Redondo M, Berlanga R, Falk T, Garnes E, Gonzalez J, Martinez C, Pontifes M, Yulatic R, Arnold K, Evans T, Sellers S, Raman V, Foster C, Murray M, Raman V, Brown T, Slater H, Wheeler K, Harlan D, Lee M, Lock JP, Hartigan C, Hubacz L, Buse J, Calikoglu A, Largay J, Young L, Brown H, Duncan V, Duclos M, Tricome J, Brandenburg V, Blehm J, Hallanger-Johnson J, Hanson D, Miller C, Weiss J, Hoffman R, Chaudhari M, Repaske D, Gilson E, Haines J, Rudolph J, McClave C, Biersdorf D, Tello A, Blehm J, Amundson D, Ward R, Rickels M, Dalton-Bakes C, Markman E, Peleckis A, Rosenfeld N, Dolan L, Corathers S, Kichler J, Baugh H, Standiford D, Hassing J, Jones J, Willis S, Willis S, Wysham C, Davis L, Blackman S, Abel KL, Clark L, Jonas A, Kagan E, Sosenko J, Blashke C, Matheson D, Edelen R, Repas T, Baldwin D, Borgwardt T, Conroy C, DeGrote K, Marchiando R, Wasson M, Fox L, Mauras N, Damaso L, Englert K, Hamaty M, Kennedy L, Schweiger M, Konstantinopoulos P, Mawhorter C, Orasko A, Rose D, Deeb L, Rohrbacher K, Schroeder L, Roark A, Ali O, Kramer J, Whitson-Jones D, Potter A, Black M, Brendle F, Gassner H, Kollipara S, Bills V, Duke J, Harwood K, Prasad V, Brault J. Obesity in Youth with Type 1 Diabetes in Germany, Austria, and the United States. J Pediatr 2015; 167:627-32.e1-4. [PMID: 26164381 DOI: 10.1016/j.jpeds.2015.05.046] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 04/28/2015] [Accepted: 05/22/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To examine the current extent of the obesity problem in 2 large pediatric clinical registries in the US and Europe and to examine the hypotheses that increased body mass index (BMI) z-scores (BMIz) are associated with greater hemoglobin A1c (HbA1c) and increased frequency of severe hypoglycemia in youth with type 1 diabetes (T1D). STUDY DESIGN International (World Health Organization) and national (Centers for Disease Control and Prevention/German Health Interview and Examination Survey for Children and Adolescents) BMI references were used to calculate BMIz in participants (age 2-<18 years and ≥ 1 year duration of T1D) enrolled in the T1D Exchange (n = 11,435) and the Diabetes Prospective Follow-up (n = 21,501). Associations between BMIz and HbA1c and severe hypoglycemia were assessed. RESULTS Participants in both registries had median BMI values that were greater than international and their respective national reference values. BMIz was significantly greater in the T1D Exchange vs the Diabetes Prospective Follow-up (P < .001). After stratification by age-group, no differences in BMI between registries existed for children 2-5 years, but differences were confirmed for 6- to 9-, 10- to 13-, and 14- to 17-year age groups (all P < .001). Greater BMIz were significantly related to greater HbA1c levels and more frequent occurrence of severe hypoglycemia across the registries, although these associations may not be clinically relevant. CONCLUSIONS Excessive weight is a common problem in children with T1D in Germany and Austria and, especially, in the US. Our data suggest that obesity contributes to the challenges in achieving optimal glycemic control in children and adolescents with T1D.
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Affiliation(s)
| | - Julia M Hermann
- Institute for Epidemiology and Medical Biometry, ZIBMT, University of Ulm, Ulm, Germany
| | | | - Roy W Beck
- Jaeb Center for Health Research, Tampa, FL
| | - Axel Dost
- Department of Pediatrics, University Children's Hospital Jena, Jena, Germany
| | | | | | - Reinhard W Holl
- Institute for Epidemiology and Medical Biometry, ZIBMT, University of Ulm, Ulm, Germany
| | - Sabine E Hofer
- Department of Pediatrics, Medical University of Innsbruck, Innsbruck, Austria
| | - David M Maahs
- Barbara Davis Center for Childhood Diabetes, Aurora, CO
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Abstract
OBJECTIVE To investigate whether serum bicarbonate (HCO3) levels can be used to accurately diagnose diabetic ketoacidosis (DKA) and classify its severity in children with new-onset diabetes mellitus (NODM). METHODS Retrospective study of all patients with NODM presenting to Boston Children's Hospital from October 1, 2007, to July 1, 2013. DKA was defined as blood glucose ≥200 mg/dL, venous pH (vpH) <7.3, and urine ketones ≥2+, and severe DKA as vpH <7.1. Linear regression was used to assess serum HCO3 as a predictor of vpH, and logistic regression to evaluate serum HCO3 as a predictor of DKA and severe DKA. RESULTS Of 690 study cohort subjects (47% girls, age 10.8 ± 4.3 years, 76.7% white), 19.4% presented with DKA. The relationship between serum HCO3 and vpH was log-linear (r = 0.87, 95% CI 0.85-0.89, P < .001). HCO3 predicted vpH (R(2) 0.75, P < .001) using the formula vpH = 6.81301 + (0.17823*ln[HCO3]) and DKA and severe DKA (c-statistic 0.97 [95% CI 0.96-0.99, P < .001] and 0.99 [95% CI 0.991-0.999, P < .001], respectively). HCO3 cutoffs of <18 and <8 mmol/L had sensitivities of 91.8% and 95.2%, and specificities of 91.7% and 96.7%, respectively, to diagnose DKA and severe DKA. Findings were similar in a validation cohort of 197 subjects. CONCLUSIONS Serum HCO3 concentration alone can substitute for vpH to diagnose DKA and classify severity in children with NODM. It is suggested as an alternative to reliance on vpH, especially in settings in which access to vpH measurement is limited.
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Affiliation(s)
| | - Joseph Wolfsdorf
- Division of Endocrinology, and ,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Henry A. Feldman
- Division of Endocrinology, and ,Clinical Research Center, Boston Children’s Hospital, Boston, Massachusetts; and
| | - Erinn T. Rhodes
- Division of Endocrinology, and ,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
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Pihoker C, Forsander G, Fantahun B, Virmani A, Luo X, Hallman M, Wolfsdorf J, Maahs DM. ISPAD Clinical Practice Consensus Guidelines 2014. The delivery of ambulatory diabetes care to children and adolescents with diabetes. Pediatr Diabetes 2014; 15 Suppl 20:86-101. [PMID: 25182310 DOI: 10.1111/pedi.12181] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 06/13/2014] [Indexed: 01/01/2023] Open
Affiliation(s)
- Catherine Pihoker
- Department of Pediatrics, University of Washington, Seattle, WA, USA
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15
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Zenlea IS, Mednick L, Rein J, Quinn M, Wolfsdorf J, Rhodes ET. Routine behavioral and mental health screening in young children with type 1 diabetes mellitus. Pediatr Diabetes 2014; 15:384-8. [PMID: 24274235 PMCID: PMC4033709 DOI: 10.1111/pedi.12099] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Revised: 09/30/2013] [Accepted: 10/23/2013] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The American Diabetes Association and International Society for Pediatric and Adolescent Diabetes recommend that providers of diabetes care receive training in the recognition of psychosocial problems related to diabetes. OBJECTIVE To report the results of routine behavioral/mental health screening for children with type 1 diabetes mellitus (T1D) seen in a multidisciplinary pediatric diabetes program. SUBJECTS AND METHODS This was a cross-sectional study of children with T1D ages 4-11 years, who underwent behavioral/mental health screening as part of their diabetes care. Screening utilized the Strengths and Difficulties Questionnaire (SDQ) Parent Proxy Version, and scores were reviewed by a social worker. SDQ scale and total difficulties scores were compared by gender, visit type, age, T1D duration, and HbA1c. Scores were also compared to age-appropriate normative data for children in United States of America (US). RESULTS SDQ Parent Proxy Version total difficulties and scale scores did not differ by patient or visit characteristics. Compared with normative data for US children, a greater proportion of children with T1D ages 4-7 and 8-10 years had borderline/abnormal scores on the emotional symptoms scale (p = 0.01 and p = 0.03, respectively), suggesting risk for psychological disorders, such as anxiety and depression. CONCLUSIONS Our findings suggest that children less than 11 years old with T1D may have greater emotional symptoms as compared to their age-matched healthy peers. Pediatric diabetes care providers, with access to mental health services, should consider incorporating routine behavioral/mental health screening for children less than 12 years old in their practice.
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Affiliation(s)
- Ian Spencer Zenlea
- Division of Endocrinology, Boston Children’s Hospital, 333 Longwood Avenue, 6 Floor, Boston, MA, United States, 02115
| | - Lauren Mednick
- Department of Psychology, Boston Children’s Hospital, 300 Longwood Avenue, Boston, MA, United States, 02115
| | - Jennifer Rein
- Division of Endocrinology, Boston Children’s Hospital, 333 Longwood Avenue, 6 Floor, Boston, MA, United States, 02115
| | - Maryanne Quinn
- Division of Endocrinology, Boston Children’s Hospital, 333 Longwood Avenue, 6 Floor, Boston, MA, United States, 02115,Department of Pediatrics, Harvard Medical School, 250 Longwood Ave, Boston, MA, United States 02115
| | - Joseph Wolfsdorf
- Division of Endocrinology, Boston Children’s Hospital, 333 Longwood Avenue, 6 Floor, Boston, MA, United States, 02115,Department of Pediatrics, Harvard Medical School, 250 Longwood Ave, Boston, MA, United States 02115
| | - Erinn T. Rhodes
- Division of Endocrinology, Boston Children’s Hospital, 333 Longwood Avenue, 6 Floor, Boston, MA, United States, 02115,Department of Pediatrics, Harvard Medical School, 250 Longwood Ave, Boston, MA, United States 02115
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Wolfsdorf J, Craig ME, Daneman D, Dunger D, Edge J, Lee W, Rosenbloom A, Sperling M, Hanas R. Diabetic ketoacidosis in children and adolescents with diabetes. Pediatr Diabetes 2009; 10 Suppl 12:118-33. [PMID: 19754623 DOI: 10.1111/j.1399-5448.2009.00569.x] [Citation(s) in RCA: 172] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Joseph Wolfsdorf
- Division of Endocrinology, Children's Hospital Boston, MA 02115, USA.
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Affiliation(s)
- Peter Betts
- Southampton University Hospitals Trust, Southampton, UK
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18
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Affiliation(s)
- Catherine Pihoker
- Department of Pediatrics, Children's Hospital, Regional Medical Center, University of Washington, Seattle, WA, USA
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Mahon JL, Sosenko JM, Rafkin-Mervis L, Krause-Steinrauf H, Lachin JM, Thompson C, Bingley PJ, Bonifacio E, Palmer JP, Eisenbarth GS, Wolfsdorf J, Skyler JS. The TrialNet Natural History Study of the Development of Type 1 Diabetes: objectives, design, and initial results. Pediatr Diabetes 2009; 10:97-104. [PMID: 18823409 DOI: 10.1111/j.1399-5448.2008.00464.x] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES TrialNet's goal to test preventions for type 1 diabetes has created an opportunity to gain new insights into the natural history of pre-type 1 diabetes. The TrialNet Natural History Study (NHS) will assess the predictive value of existing and novel risk markers for type 1 diabetes and will find subjects for prevention trials. RESEARCH DESIGN AND METHODS The NHS is a three-phase, prospective cohort study. In phase 1 (screening), pancreatic autoantibodies (glutamic acid decarboxylase, insulin, ICA-512, and islet cell antibodies) are measured. Phase 2 (baseline risk assessment) includes oral glucose tolerance tests (OGTTs) in antibody-positive subjects and estimation of 5-yr diabetes risks according to the OGTT and number of confirmed positive antibody tests. Phase 3 (follow-up risk assessments) requires OGTTs every 6 months. In phases 2 and 3, samples are collected for future tests of T-lymphocyte function, autoantibody isotypes, RNA gene expression, and proteomics. The primary outcome is diabetes onset. RESULTS Of 12 636 relatives screened between March 2004 and December 2006, 605 (4.8%) were positive for at least one biochemical antibody. Of these, 322 were confirmed antibody positive and completed phase 2, of whom 296 subjects were given preliminary 5-yr diabetes risks of <25% (n = 132), > or =25% (n = 36), and > or =50% (n = 128) where the latter two categories represent different subjects based on number of confirmed positive antibodies (2, > or =25%; 3 or more, > or =50%) and/or an abnormal OGTT (> or =50%). CONCLUSIONS The NHS is identifying potential prevention trial subjects and is assembling a large cohort that will provide new natural history information about pre-type 1 diabetes. Follow-up to diabetes will help establish the biological significance and clinical value of novel type 1 diabetes risk markers.
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Affiliation(s)
- Jeffrey L Mahon
- Division of Endocrinology and Metabolism, University of Western Ontario, London, ON, Canada.
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Orban T, Farkas K, Jalahej H, Kis J, Treszl A, Falk B, Reijonen H, Wolfsdorf J, Ricker A, Matthews J, Tchao N, Sayre P, Bianchine P. T.110. Autoantigen Specific Regulatory T Cells Induced in Patients with Type 1 Diabetes Mellitus. Clin Immunol 2009. [DOI: 10.1016/j.clim.2009.03.243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pihoker C, Forsander G, Wolfsdorf J, Klingensmith GJ. The delivery of ambulatory diabetes care: structures, processes, and outcomes of ambulatory diabetes care. Pediatr Diabetes 2008; 9:609-20. [PMID: 19067893 DOI: 10.1111/j.1399-5448.2008.00480.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Catherine Pihoker
- Department of Pediatrics, Children's Hospital, Regional Medical Center, University of Washington, Seattle, WA, USA
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Torbati D, Totapally BR, Raszynski A, Osborne J, Zyl LV, Kalomiris S, Wolfsdorf J. Age and sex differences in brain gene expression in neonatal rats. Neuropediatrics 2008; 39:219-25. [PMID: 19165710 DOI: 10.1055/s-0028-1105923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Gene expression in the central nervous system is highly region-specific. We tested the hypothesis that certain developmental biomarkers could be detected in the whole brain or in cortical, subcortical or cerebellar structures. Brain gene expressions of male and female rats at birth, 3 days, and 10 days of age were measured by microarray technique ( approximately 10 K genes; n=9/category). We found 53 significantly up-regulated and 8 down-regulated genes at 10 days of age, relative to birth and 3 days of age. The whole brain, however, showed no significant sex differences in gene expression patterns up to 10 days of age. Ten genes with the highest up-regulation, and 5 down-regulated genes were further confirmed by quantitative real-time PCR (Q-PCR), using the whole brain, cortices, subcortical structures, and cerebellum. The Q-PCR confirmed genes are known to be involved in neuronal differentiation, axonal myelination and growth, neurotransmission and glycolytic pathways. With a few exceptions, the expression levels of Q-PCR confirmed genes were significantly different in the whole brain, compared to other regions. In a separate study, we tested the potential utility of the Q-PCR confirmed genes, as whole brain biomarkers, after a six-hour exposure to hyperoxia (>98% oxygen breathing) in 10 days old rats. This relatively mild oxidative challenge created a 3.5-fold increase in the expression of T-cell receptor beta Variable 8.3b, known to have regulatory function during development. We suggest that genes displaying significant expression in the whole brain, regardless of their origin, could be used to screen normal brain development in neonatal rat models of experimental neurology.
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Affiliation(s)
- D Torbati
- Division of Critical Care Medicine, Miami Children's Hospital, Miami, FL 33155, USA.
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Affiliation(s)
- Peter Betts
- Southampton University Hospitals Trust, Southampton, UK
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Affiliation(s)
- Joseph Wolfsdorf
- Division of Endocrinology, Children's Hospital Boston, Boston, MA, USA
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Affiliation(s)
- Joseph Wolfsdorf
- Division of Endocrinology, Children's Hospital Boston, Boston, Massachusetts, USA
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Wolfsdorf J, Glaser N, Sperling MA. Diabetic ketoacidosis in infants, children, and adolescents: A consensus statement from the American Diabetes Association. Diabetes Care 2006; 29:1150-9. [PMID: 16644656 DOI: 10.2337/diacare.2951150] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Joseph Wolfsdorf
- Division of Endocrinology, Children's Hospital Boston, Boston, Massachusetts, USA
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Skyler JS, Krischer JP, Wolfsdorf J, Cowie C, Palmer JP, Greenbaum C, Cuthbertson D, Rafkin-Mervis LE, Chase HP, Leschek E. Effects of oral insulin in relatives of patients with type 1 diabetes: The Diabetes Prevention Trial--Type 1. Diabetes Care 2005; 28:1068-76. [PMID: 15855569 DOI: 10.2337/diacare.28.5.1068] [Citation(s) in RCA: 466] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE This randomized, double-masked, placebo-controlled clinical trial tested whether oral insulin administration could delay or prevent type 1 diabetes in nondiabetic relatives at risk for diabetes. RESEARCH DESIGN AND METHODS We screened 103,391 first- and second-degree relatives of patients with type 1 diabetes and analyzed 97,273 samples for islet cell antibodies. A total of 3,483 were antibody positive; 2,523 underwent genetic, immunological, and metabolic staging to quantify risk of developing diabetes; 388 had a 5-year risk projection of 26-50%; and 372 (median age 10.25 years) were randomly assigned to oral insulin (7.5 mg/day) or placebo. Oral glucose tolerance tests were performed every 6 months. The median follow-up was 4.3 years, and the primary end point was diagnosis of diabetes. RESULTS Diabetes was diagnosed in 44 oral insulin and 53 placebo subjects. Annualized rate of diabetes was similar in both groups: 6.4% with oral insulin and 8.2% with placebo (hazard ratio 0.764, P = 0.189). In a hypothesis-generating analysis of a subgroup with insulin autoantibody (IAA) levels confirmed (on two occasions) > or =80 nU/ml (n = 263), there was the suggestion of benefit: annualized diabetes rate 6.2% with oral insulin and 10.4% with placebo (0.566, P = 0.015). CONCLUSIONS It is possible to identify individuals at high risk for type 1 diabetes and to enroll them in a large, multisite, randomized, controlled clinical trial. However, oral insulin did not delay or prevent type 1 diabetes. Further studies are needed to explore the potential role of oral insulin in delaying diabetes in relatives similar to those in the subgroup with higher IAA levels.
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Affiliation(s)
- Jay S Skyler
- University of Miami, PO Box 016960 [D-110], Miami, FL 33101-6960, USA.
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Wolfsdorf J, Sadeghi-Nejad A, Senior B. Leptin-replacement therapy in lipodystrophy. N Engl J Med 2002; 346:2008-9; author reply 2009-10. [PMID: 12078705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Camacho MT, Totapally BR, Torbati D, Wolfsdorf J. Pulmonary and extrapulmonary effects of increased colloid osmotic pressure during endotoxemia in rats. Chest 2001; 120:1655-62. [PMID: 11713150 DOI: 10.1378/chest.120.5.1655] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
OBJECTIVES We tested the hypothesis that an increase in the blood colloid osmotic pressure (COP) that is maintained during early-stage endotoxemia may decrease fluid flux across capillaries and may reduce pulmonary and multiple-organ edema. DESIGN Prospective study. SETTINGS Research laboratory in a hospital. SUBJECTS Male albino Sprague-Dawley rats. INTERVENTIONS Rats were anesthetized with pentobarbital, underwent tracheotomies, were cannulated in the femoral vein and artery, and were randomly assigned to the following four groups comprising 11 rats each: group I, controls (saline solution treatment); group II, albumin treatment (three doses of 1 g/kg 25% human albumin every 2 h); group III, endotoxin treatment with a single IV dose of 4 mg/kg endotoxin; and group IV, endotoxin and albumin-treatment (4 mg/kg endotoxin plus albumin treatment). Experiments lasted for 6 h while fluid intake was equally maintained in all groups. MEASUREMENTS AND RESULTS COP and other variables were measured every 2 h. To determine the water content of an organ, after the rat was killed, the lung, heart, kidney, intestine, and liver were removed. Albumin treatment alone (group II) generated significant increases in COP (maximum, 58% from the baseline measurement) but did not change the water content of the organ, compared with saline solution-treated controls. Endotoxin-treated rats (group III) developed significant reductions in COP, with significant increases in pulmonary, renal, and heart water content compared with controls. Albumin treatment in endotoxemic rats (group IV) significantly increased the COP without improving the endotoxemia-induced organ edema. Pulmonary edema, however, was increased further, compared with endotoxemia alone. CONCLUSIONS COP elevation by albumin administration during the early stage of endotoxemia does not ameliorate pulmonary or multiple-organ edema and may aggravate pulmonary edema.
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Affiliation(s)
- M T Camacho
- Division of Critical Care Medicine, Miami Children's Hospital, Miami, FL 33155-3009, USA
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Bolivar J, Hultquist K, Raszynski A, Torbati D, Sherry N, Sussmane JB, Wolfsdorf J. Intratracheal pulmonary ventilation versus conventional mechanical ventilation: continuous carinal pressure monitoring at low and high flows and frequencies. ASAIO J 2001; 47:215-9. [PMID: 11374760 DOI: 10.1097/00002480-200105000-00010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We continuously measured proximal and carinal pressures at low and high flow rates and frequencies during conventional mechanical ventilation (CMV) and intratracheal pulmonary ventilation (ITPV), using an artificial lung. The proximal peak inspiratory pressure (PIP), carinal PIP, proximal positive end expiratory pressure (PEEP), and carinal PEEP, or negative end expiratory pressure (NEEP), were measured during simulated CMV and ITPV. Two levels of frequency (30 and 90 per min) and two gas flow rates (3 and 6 L/min) were examined, in both dry and humid states (four combinations of gas flow and frequency at each state). The gas flow and inspiratory time were held constant throughout the CMV and ITPV trials. Humidification of the ventilatory circuit during ITPV prevented the accurate measurement of carinal pressures. This problem was solved by introducing a continuous "bias flow" of 11 ml/min into the pressure monitoring line. A combination of low gas flow and low frequency with CMV showed no significant differences between the proximal and carinal PIP, as well as the proximal and carinal PEEP. The same combination with ITPV, however, resulted in a significantly lower carinal PIP and PEEP, compared to proximal PIP and PEEP. Carinal PIP and PEEP during ITPV were also significantly lower than those observed during CMV with a low flow and low frequency rates. During both CMV and ITPV, using a combination of a high flow rate with a high breathing frequency, carinal PIPs were significantly lower than proximal PIPs. ITPV, however, generated much larger differences between proximal and carinal PIPs than the CMV. A significant NEEP was generated at the carinal level during ITPV with high flow rates, both with high and low frequencies. The NEEP did not occur with a low gas flow, in combination with either a low frequency or a high frequency. The "bias flow" had no significant effect on carinal pressures. In conclusion, ITPV, compared with CMV, generates a significantly lower carinal PIP, but it may also generate carinal NEEP. For safety reasons, therefore, it is essential to monitor carinal pressures continuously in patients treated with ITPV.
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Affiliation(s)
- J Bolivar
- Division of Critical Care Medicine, Miami Children's Hospital, Florida 33155-3009, USA
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Sussmane JB, Totapally BR, Hultquist K, Torbati D, Wolfsdorf J. Effects of arteriovenous extracorporeal therapy on hemodynamic stability, ventilation, and oxygenation in normal lambs. Crit Care Med 2001; 29:1972-8. [PMID: 11588463 DOI: 10.1097/00003246-200110000-00020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To evaluate hemodynamic stability and gas exchange in a neonatal animal model of pumpless arteriovenous extracorporeal membrane oxygenation (AV-ECMO) with extracorporeal shunt flow of up to 15% of cardiac output during variable ventilation and oxygenation. DESIGN Prospective study. SETTING Research laboratory in a hospital. SUBJECTS Seven lambs (5.5 +/- 0.6 kg, mean +/- sd). INTERVENTIONS The lambs initially were anesthetized by 50 mg/kg ketamine intravenously. After tracheostomy, the lambs were mechanically ventilated and paralyzed by using 1 mg/kg vecuronium bromide followed by 0.1 mg.kg(-1).hr(-1). One femoral vein was cannulated with a pulmonary artery flotation catheter and used for cardiac output and pulmonary artery pressure measurements. A femoral artery was cannulated for measuring mean arterial blood pressure, measuring heart rate, and blood sampling for gas exchange analyses. Finally, the right internal jugular vein and carotid artery were cannulated and used for the AV-ECMO. Normothermia (38 +/- 0.5 degrees C), fluid balance (5 mL.kg(-1).hr(-1) normal saline), and anesthesia (5 mg.kg(-1).hr(-1), intravenous ketamine) were maintained. Ventilator settings were adjusted to establish a baseline Paco2 (25-35 mm Hg) at an Fio2 of 0.4. The AV-ECMO circuit was established by using a hollow fiber oxygenator, primed with maternal sheep blood (150-200 mL). MEASUREMENTS AND MAIN RESULTS The physiologic effects of the AV-ECMO shunt were evaluated at 15, 25, and 40 mL.kg(-1).hr(-1) ECMO flow, corresponding roughly to 4%, 8%, and 15% of the cardiac output values. The baseline minute volume was maintained during stepwise increases in arteriovenous shunt. A significant increase in endogenous cardiac output occurred at arteriovenous shunt of 25 and 40 mL.kg(-1).hr(-1) (analysis of variance followed by Tukey-Kramer multiple comparisons test), which was attributed to a significant increase of 30% in the heart rate. Effective cardiac output (difference between the thermodilution value and the AV-ECMO flow rate) and mean arterial blood pressure were not significantly changed. CO2 removal, measured at 15% arteriovenous shunt, was significantly increased with decreasing ventilation to 25% and 50% of the baseline (analysis of variance and Tukey-Kramer test). Oxygenation through the membrane was measured after reducing inspired Fio2 from 0.4 to 0.21, 0.15, and 0.10 with 15% arteriovenous shunt and baseline minute ventilation. Oxygen delivery by the oxygenator was significantly increased at Fio2 of 0.10, providing a maximum of 19.5% of the total oxygen consumption at an arterial hemoglobin-oxygen saturation of 60%. CONCLUSIONS Healthy lambs are capable of maintaining effective cardiac output in the presence of moderate arteriovenous shunts (15%). AV-ECMO may provide efficient ventilatory support in the neonatal population with hypercapnia. The amount of oxygen delivery with AV-ECMO depends on arterial desaturation.
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Affiliation(s)
- J B Sussmane
- Miami Children's Hospital, Division of Critical Care Medicine, Miami, FL, USA
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Chase HP, Cuthbertson DD, Dolan LM, Kaufman F, Krischer JP, Schatz DA, White NH, Wilson DM, Wolfsdorf J. First-phase insulin release during the intravenous glucose tolerance test as a risk factor for type 1 diabetes. J Pediatr 2001; 138:244-9. [PMID: 11174623 DOI: 10.1067/mpd.2001.111274] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To determine the relationship between first-phase (1 minute + 3 minutes) insulin production during the intravenous glucose tolerance test (IV-GTT) and risk factors for developing type 1 diabetes. STUDY DESIGN Relatives of persons with type 1 diabetes (n = 59,600) were screened for islet cell antibodies (ICAs). Subjects who had positive screening results underwent IV-GTT (> or =2 times), repeat ICA screening, insulin autoantibody (IAA) screening twice, and an oral glucose tolerance test. RESULTS Of the 59,600 subjects in the study, 2199 (3.69%) had positive findings on initial ICA test. IV-GTTs were performed in 1622 subjects, with children <8 years having the lowest first-phase insulin release (FPIR) and subjects 8 to 20 years of age having the highest FPIR. The FPIR was lower for subjects with a confirmed positive ICA test result or a positive IAA test result, subjects with higher titers of ICA or IAA, and subjects who had an abnormal (impaired or diabetic) oral glucose tolerance test result. CONCLUSION FPIR in the IV-GTT correlates strongly with risk factors for development of type 1 diabetes.
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Affiliation(s)
- H P Chase
- Barbara Davis Center, University of Colorado Health Sciences Center, Denver, USA
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Camacho T, Totapally BR, Hultquist K, Nelson G, Eawaz D, Sussmane JB, Wolfsdorf J. Insensible water loss during extracorporeal membrane oxygenation: an in vitro study. ASAIO J 2000; 46:620-4. [PMID: 11016519 DOI: 10.1097/00002480-200009000-00022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
To measure insensible fluid loss from silicone membrane oxygenators during extracorporeal membrane oxygenation (ECMO), an in vitro system was used. A standard neonatal ECMO circuit (Avecor) was connected to a noncompliant reservoir, which was then primed with normal saline. The experiment was conducted by using two silicone oxygenators (Avecor 0.4 and 0.8 m2), three gas flow rates (0.5, 1.0, and 2.0 L/min) (sweep), and two fluid flow rates (200 and 400 ml/min). Two methods were used to measure the water loss. One method was to replace the water to the noncompliant circuit by using a calibrated burette, and the other method was to collect condensed water after cooling the postmembrane sweep gas to 0 degrees C. The influence of the amount of sweep, fluid flow rate, size of membrane, and inlet and outlet sweep gas temperatures on measured water loss was statistically determined. The amount of water loss correlated with sweep (r2 = 0.81; p<0.00001) but was not related to the fluid flow rate, membrane size, or inlet and outlet sweep gas temperature. The average daily fluid loss measured with replacement and collection methods for each liter of sweep per minute were 72.0+/-12.6 and 62.3+/-10.0 ml, respectively. This information may be applied to clinical practice to accurately manage fluid balance in the sick neonate on ECMO.
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Affiliation(s)
- T Camacho
- Division of Critical Care Medicine, Miami Children's Hospital, Florida 33155-3009, USA
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Hon EK, Hultquist KA, Loescher T, Raszynski A, Torbati D, Tabares C, Wolfsdorf J. Intratracheal pulmonary ventilation in a rabbit lung injury model: continuous airway pressure monitoring and gas exchange efficacy. Crit Care Med 2000; 28:2480-5. [PMID: 10921582 DOI: 10.1097/00003246-200007000-00049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To compare carinal pressures vs. proximal airway pressures, and gas exchange efficacy with a constant minute volume, in lung-injured rabbits during conventional mechanical ventilation (CMV) and intratracheal pulmonary ventilation (ITPV); and to evaluate performance of a prototype ITPV gas delivery and continuous airway pressure monitoring system. DESIGN Prospective controlled study. SETTING Animal research laboratory at a teaching hospital. SUBJECTS Sixteen adult female rabbits. INTERVENTIONS Anesthetized rabbits were tracheostomized with a multilumen endotracheal tube. Anesthesia and muscle relaxation were maintained continuously throughout the study. Proximal airway pressures and carinal pressures were recorded continuously. The injection port of the multilumen endotracheal tube was used for the carinal pressure monitoring. To prevent obstruction of the port, it was flushed with oxygen at a rate of 11 mL/min. CMV was initiated with a pressure-limited, time-cycled ventilator set at an FiO2 of 1.0 and at a flow of 1.0 L/kg/min. The pressure limit of the ventilator was effectively disabled. A normal baseline for arterial blood gases was achieved by adjusting the inspiratory/expiratory time ratios. ITPV was established using a flow of 1.0 L/kg/min through a reverse thrust catheter, at the same baseline and inspiratory/expiratory ratio. Carinal positive end-expiratory pressure was maintained at a constant value of 2 cm H2O by adjusting the expiratory resistance of the ventilator circuit Lung injury was achieved over a 30-min period by three normal saline lavages of 5 mL/kg each. After lung injury, all animals were consecutively ventilated for 1 hr with CMV, for 1 hr with ITPV, and again for 1 hr with CMV. Six rabbits were ventilated at 30 breaths/min (group 1), and ten rabbits were ventilated at 80 breaths/min (group 2). Four rabbits in group 2 were subjected, 1 hr after return to CMV from ITPV, to another session of ITPV, with positive end-expiratory pressure gradually being increased to 4, 6, and 8 cm H2O for 15 mins each. RESULTS No significant differences were observed in carinal peak inspiratory pressure between CMV and ITPV modes, at both low and high frequencies of breathing, indicating that the inspired tidal volume remained constant during both modes of ventilation. Significant gradients were noted between proximal airway and carinal peak inspiratory pressure during ITPV but not during CMV. Initiation of ITPV, at a flow of 1.0 L/kg/min, required an increase in the ventilator expiratory resistance to maintain a constant level of positive end-expiratory pressure (2 cm H2O) as measured at the carina. During ITPV, the PaCO2 was significantly reduced by 20% at 30 breaths/min (p < .05) and by 22% at 90 breaths/min (p < .01), compared with CMV. Arterial oxygenation was significantly enhanced with a positive end-expiratory pressure of 6 and 8 cm H2O (p < .05 and .001, respectively), compared with a positive end-expiratory pressure of 2 cm H2O during ITPV. All components of the new prototype gas delivery and airway pressure monitoring system functioned without failure, at least for 3 hrs of the CMV, ITPV, and CMV trials. CONCLUSIONS ITPV in saline-lavaged, lung-injured rabbits at breathing frequencies of 30 and 80 breaths/min, compared with CMV at the same minute ventilation, can improve CO2 exchange. During ITPV, significant pressure gradients can develop between carinal and proximal airway pressures. Continuous carinal pressure monitoring is therefore necessary for the safe clinical application of ITPV. Reliable carinal pressure monitoring can be achieved by adding a small bias flow through the carinal pressure monitoring port. Although ITPV can remove CO2 from injured lungs efficiently, simultaneous addition of positive end-expiratory pressure can further improve arterial oxygenation.
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Affiliation(s)
- E K Hon
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155, USA
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Totapally BR, Sussmane JB, Hultquist K, Sapp D, Andreoulakis N, Wolfsdorf J. Variability in systemic arterial pressure during closed- and open-bridge extracorporeal life support: an in vitro evaluation. Crit Care Med 2000; 28:2076-80. [PMID: 10890667 DOI: 10.1097/00003246-200006000-00068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare fluctuations in systemic arterial pressure (SAP) resulting from changes in systemic vascular resistance (SVR) during closed- and open-bridge extracorporeal life support (ECLS). DESIGN In vitro laboratory study. SETTING Physiology laboratory of a tertiary care pediatric hospital. METHODS A standard neonatal ECLS circuit with simulated SAP was established using normal saline as circulating fluid. Our reference setting included an extracorporeal flow rate of 300 mL/min, a simulated SAP of 60 mm Hg, and a postoxygenator pressure of 150 mm Hg. The simulated SVR was modified by changing the degree of occlusion of the arterial catheter distal to the bridge. For this purpose, we used a graduated clamping device. Subsequently, the pressure changes were measured at four ports in the circuit. They were located as follows: a) on the venous tubing of the circuit between the bridge and the reservoir; b) on the arterial tubing of the circuit between the heat exchanger and the bridge; c) between the first and the second resistance clamps on the arterial tubing of the circuit for monitoring the simulated systemic arterial pressure; and d) at the reservoir. The experiment was repeated with various extracorporeal flow rates to the reservoir (100-300 mL/min) and through the bridge (100-300 mL/min using a custom-made clamp). Variations in the simulated SAP created by varying degrees of occlusion and flow rates were compared with repeated measures analysis of variance followed by the Tukey-Kramer test. MEASUREMENTS AND MAIN RESULTS The open-bridge ECLS significantly reduced the variations in the simulated SAP by 15% to 45% (p < .001) compared with the closed-bridge. During closed-bridge ECLS, flashing of the bridge resulted in a decrease in the SAP and transient reversal of flows through the arterial and venous cannulae. CONCLUSIONS Open-bridge ECLS decreases the fluctuations in the SAP that occur because of changes in the SVR. Open-bridge ECLS prevents transient iatrogenic changes in blood flow and blood pressure, caused by flashing of the bridge. Other potential advantages and disadvantages of the open-bridge ECLS are discussed. The application of prolonged open-bridge ECLS to the patients needs to be evaluated in animal models.
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Affiliation(s)
- B R Totapally
- Division of Critical Care Medicine, Miami Children's Hospital, FL, USA
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Ramirez J, Totapally BR, Hon E, Torbati D, Mangino MJ, Hultquist KA, Wolfsdorf J. Oxygen-carrying capacity during 10 hours of hypercapnia in ventilated dogs. Crit Care Med 2000; 28:1918-23. [PMID: 10890642 DOI: 10.1097/00003246-200006000-00039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To test if a relatively long-term exogenous hypercapnia, equivalent to those maintained during permissive hypercapnia, can persistently increase oxygen-carrying capacity in ventilated dogs. DESIGN Prospective study. SETTING Research laboratory in a hospital. SUBJECTS Six mongrel dogs (3 males; 3 females). INTERVENTIONS The dogs were anesthetized (30 mg/kg pentobarbital, i.v.), intubated, and cannulated in one femoral artery, one femoral vein, and the right jugular vein. The mean arterial blood pressure, heart rate, and mean pulmonary artery pressure were continuously recorded. Anesthesia, fluid balance, and normothermia were maintained. Arterial hypercapnia was generated by the addition of 60 torr dry CO2 (8 kPa) to the inspired air for 10 hrs, continuously. All subjects were paralyzed (vecuronium bromide) and ventilated with room air, while the ventilator settings were kept constant. MEASUREMENTS AND MAIN RESULTS Arterial and venous gas exchange profiles, hemoglobin concentration, oxygen saturation, oxygen content, cardiac output, and oxygen consumption were determined, before, during, and after 10 hrs of hypercapnia, periodically. Both hemoglobin concentration and oxygen content were gradually increased during hypercapnia and reached significant levels at 8 and 10 hrs of hypercapnia, respectively. These increases continued up to 2 hrs after termination of hypercapnia. The PaO2/FIO2, as an index of arterial oxygenation, was significantly increased during the first 3 hrs of hypercapnia and then remained at the normoxic level up to 10 hrs of hypercapnia. No significant changes occurred in the mean arterial blood pressure and oxygen consumption. The heart rate and cardiac output were significantly reduced at 4 and 8 hrs of hypercapnia, respectively. The mean pulmonary artery pressure was increased throughout the hypercapnic trial. CONCLUSIONS A relatively long-term exogenous hypercapnia can significantly increase oxygen-carrying capacity in normal ventilated dogs. Whether this effect can occur during permissive hypercapnia because of controlled ventilation in patients warrants investigation.
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Affiliation(s)
- J Ramirez
- Division of Critical Care Medicine, Miami Children's Hospital, FL, USA
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Torbati D, Camacho MT, Raszynski A, Sussmane JB, Totapally BR, Hultquist K, Wolfsdorf J. Effect of hypothermia on ventilation in anesthetized, spontaneously breathing rats: theoretical implications for mechanical ventilation. Intensive Care Med 2000; 26:585-91. [PMID: 10923734 DOI: 10.1007/s001340051208] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To test if hypothermia, induced by a sustained pentobarbital anesthesia, in rats can reduce ventilatory demands without compromising pulmonary gas-exchange efficiency. DESIGN Prospective study. SETTING Research laboratory in a hospital. SUBJECTS One group of 11 female Sprague Dawley rats. INTERVENTIONS The rats were anesthetized with 45 mg/kg pentobarbital, tracheostomized and intubated; their femoral veins and arteries were cannulated. After surgery, anesthesia and fluid balance were maintained (10 mg/kg per h pentobarbital, and 5 ml/kg per h saline, i.v.). Rectal temperature, mean arterial blood pressure (MAP), and heart rate (HR) were continuously monitored. The respiratory variables and gas-exchange profiles were determined at 38 degrees C (normothermia), and during stepwise hypothermia at 37, 35, 33, 31 and 29 degrees C. The arterial pressure of carbon dioxide (PaCO2), pH and arterial pressure of oxygen (PaO2) during hypothermia were corrected at body temperature. MEASUREMENTS AND RESULTS Graded systemic hypothermia, with maintained anesthesia, produced a strong correlation between reduction in the respiratory frequency and rectal temperature (r2 = 0.55; p < 0.0001; n = 66). The minute volume was significantly reduced, starting at 35 degrees C, without significant changes in the tidal volume (repeated measures of analyses of variance followed by Dunnett multiple comparisons test). No significant changes occurred in the PaCO2, pH, PaO2, hemoglobin oxygen saturation, the calculated arterial oxygen content and estimated alveolar-arterial oxygen difference during mild hypothermia (37-33 degrees C). The PaO2, however, was significantly reduced below 31 degrees C. The MAP remained stable at different levels of hypothermia, whereas HR was significantly reduced below 33 degrees C. CONCLUSIONS Mild hypothermia in rats, induced by a sustained pentobarbital anesthesia, reduces ventilation without compromising arterial oxygenation or acid-base balance, as measured at body temperature. Theoretically, our observations in spontaneously breathing rats imply that a combination of mild hypothermia with anesthesia could be safely utilized to maintain adequate ventilation, using relatively low minute ventilation. We speculate that such a maneuver, if applied during mechanical ventilation, may prevent secondary pulmonary damage by allowing the use of lower ventilator volume-pressure settings.
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Affiliation(s)
- D Torbati
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155, USA.
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Abstract
PURPOSE The purpose of this study was to determine a vancomycin dosage regimen among pediatric intensive care unit (PICU) patients with normal renal function resulting in desired peak and trough serum concentration and to determine the predictability of vancomycin peak concentrations based on reported trough concentrations. MATERIALS AND METHODS The medical records of all PICU patients who received vancomycin over a 12-month period were identified through a hospital computer search and were obtained from the hospital's Department of Medical Records. Demographic and laboratory data as well as the patient's vancomycin dosing history were recorded. Patients who lacked appropriately timed vancomycin peak and trough concentrations or who exhibited renal dysfunction were excluded from the study population. The optimal vancomycin dose and the predictability of peak concentrations based on trough concentrations were assessed. RESULTS A total of 135 patients were identified as having received vancomycin therapy during their PICU hospitalization between June 1997 and June 1998. Fifty-nine patients were excluded due to renal dysfunction or inappropriate vancomycin concentrations resulting in 76 patients representing our study population. The initial mean dose of vancomycin was 47 mg/kg/day resulting in a mean peak and trough serum concentration of 19 and 6 microg/mL, respectively. A mean of 2.2 (range, 1 to 5) and 2.1 (range, 1 to 5) peak and trough serum concentrations were reported for each patient, respectively. A mean of 1.1 (range, 0 to 4) dosing changes per patient was noted resulting in a final mean dose of 60 mg/kg/day corresponding to a mean peak and trough serum concentration of 26 and 8 microg/mL, respectively. A vancomycin trough concentration >5 microg/mL was highly predictive for a corresponding peak concentration >20 microg/mL (P > .0001). Eighty percent of the trough concentrations <5 microg/mL were associated with peak concentrations <20 microg/mL, whereas 81% of trough concentrations >5 microg/mL were associated with corresponding peak concentrations >20 microg/mL. CONCLUSIONS PICU patients required higher doses of vancomycin than are typically prescribed to achieve conventionally accepted peak and trough vancomycin serum concentrations. In the absence of renal impairment, we recommend an initial dosage regimen of 60 mg/kg/day divided every 8 hours. Vancomycin trough concentrations are highly predictive of corresponding peak concentrations and therefore may negate the need to obtain routine peak concentrations.
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Affiliation(s)
- M L Glover
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155-3009, USA
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Torbati D, Totapally BR, Camacho MT, Wolfsdorf J. Experimental critical care in ventilated rats: effect of hypercapnia on arterial oxygen-carrying capacity. J Crit Care 1999; 14:191-7. [PMID: 10622754 DOI: 10.1016/s0883-9441(99)90034-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE We have previously demonstrated an increased arterial O2-carrying capacity in normal ventilated dogs subjected to both acute and prolonged exogenous hypercapnia. In the present study, we tested if arterial hypercapnia, during controlled ventilation, can increase O2-carrying capacity also in rats. MATERIALS AND METHODS Twenty young male Sprague Dawley rats were anesthetized (60 mg/kg pentobarbital), tracheostomized, intubated, and one femoral vein and artery were cannulated. Anesthesia and paralysis were maintained using 15 mg/kg/h pentobarbital intravenously, and 2 mg/kg/h vecuronium bromide. The fluid balance (5 mL/kg/h saline), normothermia, and minute volume were maintained. The mean arterial blood pressure and heart rate were continuously monitored. Experiments included the following: (1) a control group, ventilated with normoxic air for 150 minutes (n = 5); (2) mild hypercapnia, a group of eight rats ventilated with normoxic air for 30 minutes and then ventilated with a mixture of normoxic air at 60 mm Hg CO2 (8 kPa) for 1 hour; and (3) severe hypercapnia, a group of seven rats were treated exactly as in group II, except a 90 mm Hg (12 kPa) CO2 during hypercapnia. Gas-exchange profile, arterial hemoglobin (Hb) concentration, arterial Hb-oxygen saturation (Hb-O2), and arterial O2 content were periodically determined during normocapnia and 1 hour of hypercapnia. RESULTS Exposures to mild and severe hypercapnia, in rats with maintained ventilation, significantly reduced the arterial O2 content by 20% and 33%, respectively, without significant changes in the arterial Hb concentration (-2%). Severe hypercapnia generated a significant reduction of -14% in the PaO2, but not in PaO2/ FiO2 ratio. CONCLUSION Rats subjected to controlled ventilation and permissive hypercapnia, unlike dogs and perhaps humans, show no augmentation of Hb concentration. Hypercapnia in rats also provokes much stronger Bohr effect than in dogs. Hypercapnia-induced Bohr effect in rats is accompanied with extreme desaturations of Hb-O2, and substantial reduction in the O2-carrying capacity. We speculate that the strong hypercapnia-induced Bohr effect in rats may prevent hypoxia at the tissue level. However, to maintain a stable oxygen-carrying capacity in rats used for pulmonary critical care studies with hypercapnia, we suggest to use hyperoxia, with or without a mild hypothermia.
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Affiliation(s)
- D Torbati
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33156, USA
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Torbati D, Ramirez J, Hon E, Camacho MT, Sussmane JB, Raszynski A, Wolfsdorf J. Experimental critical care in rats: gender differences in anesthesia, ventilation, and gas exchange. Crit Care Med 1999; 27:1878-84. [PMID: 10507613 DOI: 10.1097/00003246-199909000-00028] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To compare normative ventilatory and gas-exchange data and anesthetic requirements in male and female rats subjected to critical care conditions. DESIGN Prospective study. SETTING Critical care research laboratory in a hospital. SUBJECTS Twenty-two age-matched young male and female rats (Sprague-Dawley, Long Evans strain). INTERVENTIONS Anesthesia was induced with 65 and 45 mg/kg pentobarbital in male and female rats, respectively. The rats were then tracheostomized and cannulated in one femoral vein and artery. Anesthesia was maintained using 8-15 mg/kg/hr pentobarbital (iv) and controlled by continuous hemodynamic monitoring. MEASUREMENTS AND MAIN RESULTS Normoxic baselines for breathing frequency, tidal volume, minute volume, inspiratory-to-expiratory ratio, inspiratory drive (tidal volume/inspiratory time), respiratory system compliance, peak airway pressure, and gas-exchange profiles were established. Ventilatory and gas-exchange responses to oxygen and CO2 were then determined by exposure to 10 mins of hyperoxia (100% oxygen), two levels of mild and severe hypercapnic hyperoxia (inspired Pco2 of 30 and 60 torr; 4 and 8 kPa), and two levels of mild and severe normocapnic hypoxia (inspired PO2 of 81 and 48 torr; 10.7 and 6.3 kPa). The average anesthetic requirement (during a 5- to 6-hr experiment) was 30% less in the female rats than in the male rats (p < .05). Female rats showed significantly lower breathing frequency, minute volume (mL/min/kg), and inspiratory drive (mL/kg/sec) during hyperoxia, mild and severe hypercapnia, and mild hypoxia. Pulmonary peak airway pressure was significantly lower in the female rats, consistent with a significantly higher weight-indexed compliance during all exposures. The female rats also had significantly higher inspiratory-to-expiratory ratio and higher PaCO2 with lower pH during normoxia, hyperoxia, and mild hypercapnia. These gender differences had no effect on PaO2, which was similar in all exposures. CONCLUSIONS There are significant gender differences in ventilation, gas exchange, and anesthetic requirements in rats subjected to critical care conditions. The gas-exchange values observed in these spontaneously breathing rats may represent the optimal levels attainable during pentobarbital anesthesia with normal lungs. They may serve as standards for ventilator settings in the rat models used for critical care studies.
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Affiliation(s)
- D Torbati
- Division Critical Care Medicine, Miami Children's Hospital, FL 33155-3009, USA.
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Totapally BR, Raszynski A, Sussmane J, Hultquist K, Hernandez J, Andreoulakis N, Wolfsdorf J. Nitric oxide and nitrogen dioxide concentrations during in vitro high-frequency oscillatory ventilation. J Crit Care 1999; 14:141-9. [PMID: 10527252 DOI: 10.1016/s0883-9441(99)90027-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE The purpose of this study was to measure nitric oxide (NO) and nitrogen dioxide (NO2) concentrations, at various ventilatory settings and sampling sites, during in vitro inhaled NO and high-frequency oscillatory ventilation therapy [iNO-HFOV]. MATERIALS AND METHODS We used a high-frequency oscillatory ventilator (model 3100A, SensorMedics, Yorba Linda, CA), a test lung (model VT-2A Ventilator Tester, Bio-Tek Instruments, Inc., Winooski, VT), nitric oxide delivery and NO/NO2 monitoring (Pulmonox II, Pulmonox, Tofield, Canada), and scavenging systems in this study. The ventilator frequency, amplitude, and inspired oxygen concentration were systematically changed at a fixed flow of NO. The concentrations of NO and NO2, sampled at four sites, were determined by an electrochemical method (Pulmonox II). The NO and NO2 concentrations were measured at the proximal part of the inspiratory limb (site 1), near the Y-piece (site 2), the carina of the test lung (site 3), and the bellows of the test lung (site 4). RESULTS The concentration of NO decreased significantly (P < .001) from the proximal port (site 11 of the inspiratory circuit (86.16 +/- 0.38 ppm) through the lung bellows (site 4) (70.08 +/- 0.23 ppm). The concentration of NO2 increased significantly (P < .001) from site 1 (3.25 +/- 0.04 ppm) through site 4 (19.4 +/- 0.19 ppm). However, the total concentration of NO + NO2 (NOx) remained unchanged at both site 1 and site 4. Increasing the frequency and amplitude of the ventilator significantly altered NO and NO2 concentrations. The NO2 concentration increased significantly (P < .0001) from 5.6 ppm to 18.1 ppm at site 4 when the fraction of inspired oxygen was increased from 0.25 to 0.93. The NO2 concentration also increased significantly (P < .0001) from 0.6 ppm to 18.7 when NO concentrations were independently increased from 12 ppm to 80 ppm. CONCLUSIONS During HFOV, the concentrations of NO and NO2 vary between sampling sites and also are influenced by the frequency, amplitude, and inspired oxygen concentration. NO2 concentrations in the lung were significantly increased above commonly accepted toxic concentrations during ventilation with high concentrations of NO (80 ppm) and high fractional concentrations of oxygen. The excessive increase in NO2 concentration at the "alveolar" level in our test lung model warrants confirmation in an in vivo model.
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Affiliation(s)
- B R Totapally
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155, USA
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Abstract
OBJECTIVE To present a case of the use of alteplase for the successful resolution of an upper extremity occlusion in a newborn receiving extracorporeal membrane oxygenation (ECMO). CASE SUMMARY A two-day-old full-term Hispanic girl receiving ECMO support developed a left upper extremity occlusion distal to the brachial artery. Alteplase therapy was initiated with a bolus dose of 0.48 mg/kg followed by a continuous infusion of 0.27 mg/kg/h for three hours. A repeat Doppler ultrasound revealed little improvement, resulting in continuation of alteplase therapy at an infusion rate of 0.27 mg/kg/h for an additional three hours. At the completion of the infusion, perfusion was greatly improved with palpable radial pulse present. While remaining on ECMO support, a brain ultrasound approximately 13 hours after alteplase therapy revealed a grade I right caudate head hemorrhage with normal ventricles. ECMO support was discontinued during the next 24 hours, with a repeat brain ultrasound three days later indicating no acute hemorrhage, normal ventricles, and almost complete resolution of the intraventricular hemorrhage. The neonate was discharged 19 days after discontinuing ECMO support. DISCUSSION Patients receiving ECMO support are at risk of hematologic complications, including thrombi formation. Moreover, limited information is available regarding the most appropriate thrombolytic therapy for patients receiving ECMO support. Alteplase is an attractive thrombolytic agent given its antigenicity, clot specificity, and pharmacokinetic profile. However, both ECMO support and thrombolytic therapy are risk factors for the development of intraventricular hemorrhage, which our patient developed. Therefore, close monitoring of patients receiving ECMO support and alteplase therapy is essential given the potential for hematologic adverse effects. CONCLUSIONS Alteplase is an effective thrombolytic agent in neonates receiving ECMO support. Additional experience with alteplase is necessary to determine the optimal dose and duration of therapy in this patient population.
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Affiliation(s)
- M L Glover
- Department of Pharmacy Practice, College of Pharmacy, Nova Southeastern University, Ft. Lauderdale, FL, USA
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Torbati D, Mangino MJ, Garcia E, Estrada M, Totapally BR, Wolfsdorf J. Acute hypercapnia increases the oxygen-carrying capacity of the blood in ventilated dogs. Crit Care Med 1998; 26:1863-7. [PMID: 9824080 DOI: 10.1097/00003246-199811000-00030] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To test the hypothesis that PaCO2 levels generated during permissive hypercapnia may enhance arterial oxygenation, when ventilation is maintained. DESIGN Prospective study. SETTING Research laboratory in a hospital. SUBJECTS One group of eight mongrel dogs (four male; four female). INTERVENTIONS The dogs were anesthetized (30 mg/kg iv pentobarbital), intubated, and cannulated in one femoral artery and vein. While paralyzed with 0.1 mg/kg/hr iv vecouronium bromide, all subjects were ventilated with room air. Anesthesia was maintained, using 2 to 3 mg/kg/hr iv pentobarbital. Arterial hypercapnia at the levels generated during permissive hypercapnia was produced by stepwise increases in the dry, inspired Pco2 (PiCO2) (0, 30, 45, 60 and 75 torr [0, 4, 6, 8, and 10 kPa]; 15 mins each). MEASUREMENTS AND MAIN RESULTS Blood gas profiles were determined at each level of hypercapnia. The minute volume was maintained at the baseline level during all exposures. Arterial hypercapnia produced gradual and significant increases in the hemoglobin concentration. These increases were approximately 6%, 7%, 11%, and 14% at PiCO2 of 30, 45, 60, and 75 torr (4, 6, 8, and 10 kPa), respectively (p < .05; repeated analysis of variance followed by Dunnett multiple comparisons test). In parallel, the oxygen content increased by approximately 6%, 7%, 11%, and 13%, respectively. During hypercapnic trials, the PaO2 remained at the normal range, whereas the dry, inspired PO2 (PiO2) was reduced from 150 to 138 torr (20 to 18.4 kPa). The average PaO2 at the highest investigated level of arterial hypercapnia was at a normal range. The hemoglobin concentration and oxygen content returned to baseline values 30 mins after hypercapnic trials. The PaCO2 and pH became normalized 15 mins after hypercapnic trials. Indirect evidence for a similar response to hypercapnia in humans is presented. CONCLUSIONS Permissive hypercapnia due to inhaled CO2 increases oxygen-carrying capacity in dogs. The PaO2 remains at normal range even at a PiCO2 of 75 torr (10 kPa). The benefits of these effects during permissive hypercapnia, due to controlled hypoventilation, warrants investigation.
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Affiliation(s)
- D Torbati
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155-3009, USA
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Soler M, Raszynski A, Kandrotas RJ, Sussmane JB, Aznavorian R, Wolfsdorf J. Fewer interventions in the immediate post-extubation management of pediatric intensive care unit patients: safety and cost containment. J Crit Care 1997; 12:173-6. [PMID: 9459112 DOI: 10.1016/s0883-9441(97)90028-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE The purpose of this article was to compare the safety and patient charges of two postextubation treatment regimens. MATERIALS AND METHODS Twenty-two pediatric patients, between the ages of 7 months and 13 years, who were mechanically ventilated for less than 5 days were studied in a prospective randomized nonblinded study at a multidisciplinary pediatric intensive care unit. Immediately after extubation all patients received supplemental oxygen, administered via mask or nasal cannulae, at a flow rate or concentration sufficient to maintain the pulse oximetric arterial oxygen saturations > 95%; arterial blood gas analyses were performed at 30 minutes after extubation. The subjects were randomly assigned to one of two protocols. Protocol A (our standard management) consisted of (1) three nebulized albuterol treatments administered 1 hour apart, and (2) a chest radiograph obtained within 60 minutes of extubation. Protocol B included one nebulized albuterol treatment administered immediately after extubation. We measured the heart rate, respiratory rate, and arterial blood pressure immediately after and at 60, 120, and 180 minutes following extubation. The following data were also recorded: arterial blood gas analysis results and continuous pulse oximetric arterial oxygen saturation levels. Any significant complications, such as stridor, respiratory distress, or requirement for reintubation, were noted if they occurred within 24 hours of extubation. Patient charge costs were calculated after obtaining the prevailing hospital and physician charges at the time of the study. RESULTS Eleven patients completed each arm of the study (total = 22). There were no statistically significant differences between the two groups with respect to arterial pH, serum bicarbonate, pulse oximetric arterial oxygen saturation, arterial blood pressure, respiratory rate, or heart rate (P > .05). Patients treated with Protocol A had a statistically, but not clinically, significant higher mean PaO2 and PaCO2 (P = .02 and P = .05, respectively) than those in Protocol B. Associated charges per patient for Protocol A were $863.50 versus $476.00 for Protocol B. This is a savings of $387.50 per patient. Our pediatric intensive care unit provides care to over 600 intubated patients per year, which would equate to a charge savings of $232,500.00 per year. CONCLUSION A modified postextubation management protocol, consisting of fewer interventions, resulted in significant patient charge savings with no increased risk to the patient.
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Affiliation(s)
- M Soler
- Division of Critical Care Medicine, Miami Children's Hospital, FL 33155, USA
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Affiliation(s)
- M Soler
- Division of Critical Care, Miami Children's Hospital, FL 33155, USA
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Raszynski A, Hultquist KA, Latif H, Sussmane J, Soler M, Alam A, Brao J, Amor J, Kilheeney D, Kolobow T, Wolfsdorf J. Rescue from Pediatric ECMO with Prolonged Hybrid Intratracheal Pulmonary Ventilation. ASAIO J 1993. [DOI: 10.1097/00002480-199339030-00101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Möller J, Gilman JT, Sussmane J, Raszynski A, Wolfsdorf J. Changes in plasma levels of oxygen radical scavenging enzymes during extracorporeal membrane oxygenation in a lamb model. Biol Neonate 1993; 64:134-9. [PMID: 8260545 DOI: 10.1159/000243983] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We studied levels of superoxide dismutase, glutathione, reductase, glutathione peroxidase and lipoperoxides in 12 healthy lambs below 1 year of age (8-19 kg) under therapy with extracorporeal membrane oxygenation (ECMO). Plasma levels of these free oxygen radical scavenging enzymes and lipoperoxides were taken 1 day before the ECMO experiment, at the beginning of ECMO after the first rotations of the roller pump, during, and after ECMO. The pre-ECMO results of days 1 and 2 were compared with the during-ECMO results and those with the post-ECMO results using the t test for paired samples. We found a significant decrease of both superoxide dismutase and glutathione reductase on ECMO, a trend to increased lipoperoxide levels, and unchanged levels of glutathione peroxidase. After discontinuing bypass the levels began to normalize again. We conclude that ECMO reduces some oxygen radical scavenging enzyme levels and exhibits a trend to increased lipoperoxide levels. Near total lung collapse with consecutive reperfusion injury might be harmful considering these results. However, the nonsignificant increase in lipoperoxide levels excludes considerable oxygen toxicity during this short ECMO trial.
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Affiliation(s)
- J Möller
- Division Critical Care Medicine, Miami Children's Hospital, Fla
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Möller JC, Gilman JT, Kearns GL, Sussmane JB, Raszynski A, Wolfsdorf J, Reed MD. Effect of extracorporeal membrane oxygenation on tobramycin pharmacokinetics in sheep. Crit Care Med 1992; 20:1454-8. [PMID: 1395668 DOI: 10.1097/00003246-199210000-00015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND AND METHODS Critically ill infants undergoing extracorporeal membrane oxygenation (ECMO) therapy often receive multiple pharmacologic agents. Although the disposition of many drugs has been assessed in patients undergoing cardiopulmonary bypass and in patients receiving mechanical ventilation, only limited data exist for selected medications in patients undergoing ECMO. To evaluate the potential influence of ECMO on aminoglycoside pharmacokinetics, we studied the disposition of tobramycin in ten sheep before and during ECMO therapy. Each sheep received a single iv dose of tobramycin during a control period before ECMO and on a study day during ECMO. Identically timed serial blood samples over 4 hrs were obtained after each tobramycin dose. Paired serum tobramycin concentrations were obtained pre- and postmembrane oxygenator during ECMO in six sheep. RESULTS Alterations in specific pharmacokinetic variables for tobramycin were observed as a result of ECMO. Estimates of elimination half-life and volume of distribution for tobramycin were significantly increased during ECMO as compared with control (pre-ECMO) values (1.8 +/- 0.3 vs. 2.7 +/- 0.8 [SD] hrs [p < .01] and 0.3 +/- 0.1 vs. 0.5 +/- 0.2 L/kg [p < .005], respectively). Tobramycin body clearance was unaffected by the procedure (1.8 +/- 0.8 vs. 1.7 +/- 0.4 mL/min/kg). Paired serum tobramycin concentrations obtained pre- and postmembrane oxygenator demonstrated no drug removal. CONCLUSIONS These data suggest that ECMO circuitry does not sequester tobramycin and that the prolonged elimination half-life observed during ECMO therapy is not due to a change in drug clearance but is due to an ECMO-induced increase in tobramycin volume of distribution. To achieve and maintain preselected target tobramycin serum concentrations during ECMO, the usual dosage interval should remain unchanged, but the dose should be increased to compensate for the alteration in the drug's volume of distribution. The clinical applicability of these findings needs to be confirmed in carefully controlled clinical studies involving infants receiving ECMO therapy.
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Affiliation(s)
- J C Möller
- Division of Critical Care Medicine, Miami Children's Hospital, FL
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Lopez AM, Wolfsdorf J, Raszynski A, Contijoch-Serrano V. Estimation of nitrogen balance based on a six-hour urine collection in infants. JPEN J Parenter Enteral Nutr 1986; 10:517-8. [PMID: 3761525 DOI: 10.1177/0148607186010005517] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The accuracy of a 6-hr vs a 24-hr urine collection for the determination of urinary urea nitrogen was studied in 15 infants. Patient's age ranged from 2 weeks to 3 yr, encompassing a wide variety of diagnoses. All patients had normal renal function at the time of the study. Participants had indwelling foley catheters throughout the study. Urine specimens were collected over a continuous 24-hr period. Aliquots obtained from urine collected over 0 to 6 hr and the total urine collection were analyzed utilizing the urease enzymatic method in the Astra. Statistical analysis was performed comparing the actual 24-hr determination to the estimation based on the 6-hr collection, utilizing linear regression. The analysis of data produced a highly significant correlation (r = 0.904, p less than 0.0001). When a 24-hr urine collection is not possible, a 6-hr collection is a useful alternative for the calculation of nitrogen balance in infants.
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Abstract
A 15-year-old woman with thyrotoxicosis controlled by propylthiouracil presented with chills, fever, splenomegaly, anemia, thrombocytopenia, leukopenia, hypergammaglobulinemia, immune complexes, a positive anti-nuclear antibody test, and a cellular marrow with normal maturation. Anti-neutrophil antibody was detected by cytotoxicity testing. The activity was restricted to the IgM fraction and was absorbed optimally at 4 degrees C. The antibody activity was recovered in both heat and ether eluates made from granulocytes. Lymphocytes, platelets, and red blood cells failed to absorb reactivity. The antibody did not inhibit superoxide production or bacterial killing. Propylthiouracil was discontinued and all signs and symptoms resolved.
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