keyword
MENU ▼
Read by QxMD icon Read
search

L-T4

keyword
https://www.readbyqxmd.com/read/28589090/neither-baseline-nor-changes-in-serum-triiodothyronine-during-levothyroxine-liothyronine-combination-therapy-predict-a-positive-response-to-this-treatment-modality-in-hypothyroid-patients-with-persistent-symptoms
#1
Bjarke Borregaard Medici, Jeppe Lerche la Cour, Luba Freja Michaelsson, Jens Oscar Faber, Birte Nygaard
BACKGROUND: Despite biochemical euthyroidism, some levothyroxine (L-T4)-treated hypothyroid patients report persisting symptoms and some of these patients are tentatively treated with a combination of L-T4 and liothyronine (L-T3). Combination therapy and the appropriate choice of blood tests to monitor treatment are highly debated among specialists and patients. AIM: To evaluate whether measuring serum triiodothyronine (S-T3) at baseline or during combination therapy can be used as an indicator of a positive effect from L-T4/L-T3 combination therapy...
April 2017: European Thyroid Journal
https://www.readbyqxmd.com/read/28572820/tsh-variability-of-patients-affected-by-differentiated-thyroid-cancer-treated-with-levothyroxine-liquid-solution-or-tablet-form
#2
Carlo Cappelli, Ilenia Pirola, Elena Gandossi, Claudio Casella, Davide Lombardi, Barbara Agosti, Fiorella Marini, Andrea Delbarba, Maurizio Castellano
BACKGROUND: Recent guidelines from the American Thyroid Association (ATA) indicate that, in many patients affected by differentiated thyroid cancer (DTC), the serum TSH should be maintained between 0.1 and 0.5 mU/L. The purpose of this study was to evaluate the TSH variability of patients affected by DTC treated with liquid L-T4 formulation or in tablet form. PATIENTS AND METHODS: Patients were eligible if (a) they were submitted to a total thyroidectomy and (131)I remnant ablation for DTC in our institution and (b) they were classified low-risk patients according to ATA guidelines 2009...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28566447/management-of-endocrine-disease-l-thyroxine-replacement-therapy-in-the-frail-elderly-a-challenge-in-clinical-practice
#3
Rosaria Maddalena Ruggeri, Francesco Trimarchi, Bernadette Biondi
The number of elderly people, mostly over 85 years (the "oldest old"), is increasing worldwide. As a consequence, accompanying morbidity and disability have been increasing, and frailty, defined as an age-related condition of decline of physiological reserves and vulnerability, represents an emerging problem. Caring for older frail people may represent a challenge, since the elderly differ significantly from younger adults in terms of comorbidity, polypharmacy, pharmacokinetics and greater vulnerability to adverse drug reactions...
May 31, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28561265/mild-tsh-resistance-clinical-and-hormonal-features-in-childhood-and-adulthood
#4
Maria Cristina Vigone, Marianna Di Frenna, Fabiana Guizzardi, Giulia Gelmini, Tiziana de Filippis, Stefano Mora, Silvana Caiulo, Micol Sonnino, Marco Bonomi, Luca Persani, Giovanna Weber
OBJECTIVE: Mutations in TSH receptor (TSHR) are associated with TSH resistance, a genetic defect characterized by a heterogeneous phenotype ranging from severe hypothyroidism to subclinical hypothyroidism (SCH). We assessed the clinical and hormonal pattern of TSHR variants in a series of pediatric patients, and the long-term outcome of growth, biochemical measurements of metabolism and neuropsychological functions in TSHR mutations carriers. DESIGN: Observational, retrospective study...
May 31, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28468766/regorafenib-induced-hypothyroidism-and-cancer-related-fatigue-is-there-a-potential-link
#5
Fabiana Pani, Matteo Massidda, Valeria Pusceddu, Marco Puzzoni, Elena Massa, Clelia Madeddu, Mario Scartozzi, Stefano Mariotti
OBJECTIVE: Thyroid dysfunction has been reported during Regorafenib (Reg) administration, but no detailed study is presently available. DESIGN: Prospective, observational cohort study. Patients with documented metastatic colorectal cancer and progression of disease during or within 3 months after the last standard therapy, with no evidence and history of previous thyroid disease were enrolled. METHODS: Twenty-five consecutive patients were evaluated before and 8-50 weeks after initiating Reg therapy by monthly clinical, ultrasound and laboratory (thyrotropin (TSH), free thyroxine (fT4), antithyroglobulin (TgAb) and antithyroid peroxidase (TPOAb)) evaluation...
July 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28460140/thyroid-function-variation-in-the-normal-range-energy-expenditure-and-body-composition-in-l-t4-treated-subjects
#6
Mary H Samuels, Irina Kolobova, Megan Antosik, Meike Niederhausen, Jonathan Q Purnell, Kathryn G Schuff
Purpose: It is not clear whether upper limits of the TSH reference range should be lowered. This debate can be better informed by investigation of whether variations in thyroid function within the reference range have clinical effects. Thyroid hormone plays a critical role in determining energy expenditure, body mass, and body composition, and therefore clinically relevant variations in these parameters may occur across the normal range of thyroid function. Methods: This was a cross-sectional study of 140 otherwise healthy hypothyroid subjects receiving chronic replacement therapy with levothyroxine (L-T4) who had TSH levels across the full span of the laboratory reference range (0...
April 28, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28398655/seasonal-variations-in-tsh-serum-levels-in-athyreotic-patients-under-l-thyroxine-replacement-monotherapy
#7
Damiano Gullo, Adele Latina, Francesco Frasca, Sebastiano Squatrito, Antonino Belfiore, Riccardo Vigneri
BACKGROUND: Whether serum TSH undergoes seasonal fluctuations in euthyroid and hypothyroid residents of temperate climates is controversial. METHODS: Monthly TSH and thyroid hormone levels were cross-sectionally analyzed in a large cohort of euthyroid subjects (n=11,806) and L-thyroxine (L-T4)-treated athyreotic patients (n=3,934). Moreover, in a small group (n=119) of athyreotic patients treated with an unchanged dosage of L-T4 monotherapy, hormones were measured both in the coldest and the hottest seasons of the same year (longitudinal study)...
April 11, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28375832/fatigue-in-patients-with-systemic-sclerosis-and-hypothyroidism-a-review-of-the-literature-and-report-of-our-experience
#8
Alessandro Antonelli, Poupak Fallahi, Flavia Di Bari, Dilia Giuggioli, Silvia Martina Ferrari, Clodoveo Ferri
Persistent fatigue (defined as ongoing exhaustion, disproportionate to exertion and not adequately alleviated by rest) reduces health-related quality of life of systemic sclerosis (SSc) patients. Fatigue in SSc is associated with reduced capacity to carry out daily activities, work disability and impaired physical function. Clinical studies demonstrated a high prevalence of autoimmune thyroiditis and hypothyroidism in patients with SSc. Since hypothyroidism and the associated fatigue symptoms could be cured by L-thyroxine (L-T4) substitutive therapy, the evolution of fatigue symptoms in SSc hypothyroid patients treated with substitutive therapy has been recently evaluated, showing an amelioration of the fatigue symptoms...
April 4, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28358714/effects-of-l-thyroxine-treatment-on-heart-functions-in-infants-with-congenital-hypothyroidism
#9
Alev Arslan, Veysel Nijat Baş, Salih Uytun, Hatice Gamze Poyrazoğlu
BACKGROUND: Impaired heart functions in newborns with hypothyroidism should be reversed by levothyroxine substitution therapy. The aim of the study was to investigate heart functions with congenital hypothroidism (CH) in newborns and changes after levothyroxine substitution therapy, measured with tissue Doppler echocardiography and conventional echocardiography. METHODS: The study included 30 neonates with CH and 34 healthy controls. Echocardiography were performed at baseline, 2nd week and 6th month of therapy...
March 30, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28342184/the-lipid-lowering-effect-of-levothyroxine-in-patients-with-subclinical-hypothyroidism-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#10
REVIEW
Xiang Li, Yupeng Wang, Qingbo Guan, Jiajun Zhao, Ling Gao
OBJECTIVES: Dyslipidaemia is common in patients with subclinical hypothyroidism (SCH). To date, there is no universal agreement regarding the lipid-lowering effect of substitution treatment with L-T4 in patients with SCH. We aimed to clarify the effect by conducting this systematic review and meta-analysis of randomized controlled trials (RCTs). DESIGN: We systematically searched PubMed, the Cochrane Library, ClinicalTrials.gov and EMBASE for RCTs comparing substitution treatment to placebo treatment or observation...
March 25, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28249913/alteration-of-hemostatic-parameters-in-patients-with-different-levels-of-subclinical-hypothyroidism-and-the-effect-of-l-thyroxine-treatment
#11
Fang Gao, Guangya Wang, Jinxiu Xu
Subclinical hypothyroidism (SH) is associated with hypercoagulability and hypofibrinolysis. The objective of this study was to assess the effect of L-thyroxine (L-T4) treatment and to evaluate changes in the hemostatic abnormalities of patients with varying severities of SH. We measured tissue plasminogen activator (t-PA), plasminogen activator inhibitor-1 (PAI-1), D-dimer (DDI), fibrinogen (FIB), platelet counts (PLT), mean platelet volume (MPV), platelet distribution width (PDW), activated partial thromboplastin time (APTT), and prothrombin time (PT) in 149 female subjects...
January 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28213226/a-feasible-method-for-indirect-quantification-of-l-t4-in-drugs-by-iodine-determination
#12
Marcia Foster Mesko, Alessandra Cortes Teotonio, Dirce Taina Teixeira Oliveira, Diogo La Rosa Novo, Vanize Caldeira Costa
In this work, a method combining microwave-induced combustion (MIC) for sample preparation of commercial levothyroxine sodium (L-T4) drugs (L-T4: 25-200µg/tablet), and potentiometry with ion selective electrode (ISE) for iodine determination and subsequent indirect quantification of L-T4 was proposed. The type and concentration of the absorbing solution were evaluated to select the most suitable conditions for this study. Using the MIC method, it was possible to use solutions as diluted as 150mmolL(-1) (NH4)2CO3 (for samples containing 25-200µg of L-T4/tablet) for I absorption...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28207545/primary-hypothyroidism-in-the-community-lower-daily-dosages-of-levothyroxine-replacement-therapy-for-asian-patients
#13
Ngiap Chuan Tan, Rong Quan Chew, Yi Ling Eileen Koh, Reena Chandini Subramanian, Usha Sankari, Meykkumar Meyappan, Li Wei Cho
The goal of treatment in patients with primary hypothyroidism is to attain euthyroidism guided by the stipulated thyroid-stimulating hormone (TSH) levels range so as to minimize any potential long-term adverse effects. However, various factors may result in their Levothyroxine (T4) under and over-replacement.Our study aimed to evaluate the mean daily dose of L-T4 replacement for Asian patients with primary hypothyroidism. The secondary aims were to determine the proportion of those who were either over or under-replaced, and the factors associated with their thyroid function status and replacement adherence...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28151692/oral-liquid-levothyroxine-solves-the-problem-of-tablet-levothyroxine-malabsorption-due-to-concomitant-intake-of-multiple-drugs
#14
Roberto Vita, Flavia Di Bari, Salvatore Benvenga
BACKGROUND: Unlike the tablet (TAB) formulation, liquid L-T4 (LIQ) is directly absorbed in the intestine. The aim of this study was to assess whether LIQ was superior to TAB, such that it would overcome the interference induced by co-ingestion of multiple interfering drugs (ID). METHODS: In this prospective cohort study, we recruited 11 patients with apparent reduced TAB absorption due to ≥ 2 ID, and switched them to LIQ while maintaining the daily dose and the co-ingestion of the ID...
April 2017: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/28125093/effect-of-l-thyroxine-supplementation-on-very-low-birth-weight-infants-with-transient-hypothyroxinemia-of-prematurity-at-3-years-of-age
#15
A Uchiyama, R Kushima, T Watanabe, S Kusuda
OBJECTIVE: To evaluate the effects of levothyroxine (L-T4) supplementation on growth and neurodevelopmental outcomes at 3 years of age in very low birth weight (VLBW) infants with transient hypothyroxinemia of prematurity (THOP). STUDY DESIGN: VLBW infants with plasma thyroid-stimulating hormone concentrations <10 mIU l(-1) and free thyroxine concentrations <0.8 ng dl(-1) were defined as having THOP and randomly assigned to the Treated (20 infants) or Untreated (31 infants) group...
January 26, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27973686/effects-of-electromagnetic-fields-on-bone-loss-in-hyperthyroidism-rat-model
#16
Chaoxu Liu, Yingchi Zhang, Tao Fu, Yang Liu, Sheng Wei, Yong Yang, Dongming Zhao, Wenchun Zhao, Mingyu Song, Xiangyu Tang, Hua Wu
Optimal therapeutics for hyperthyroidism-induced osteoporosis are still lacking. As a noninvasive treatment, electromagnetic fields (EMF) have been proven to be effective for treating osteoporosis in non-hyperthyroidism conditions. We herein systematically evaluated the reduced effects of EMF on osteoporosis in a hyperthyroidism rat model. With the use of Helmholtz coils and an EMF stimulator, 15 Hz/1 mT EMF was generated. Forty-eight 5-month-old male Sprague-Dawley rats were randomly divided into four different groups: control, levothyroxine treated (L-T4), EMF exposure + levothyroxine (EMF + L-T4), and EMF exposure without levothyroxine administration (EMF)...
February 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/27902975/timing-of-hormone-withdrawal-in-children-undergoing-131i-whole-body-scans-for-thyroid-cancer
#17
Sophie Turpin, Raymond Lambert, Cheri Deal
BACKGROUND: Little objective pediatric data exist to guide the optimal time needed to achieve thyroid-stimulating hormone (TSH) levels ≥30 μIU/mL prior to performing 131I or 123I whole-body scan (WBS) imaging in children with thyroid cancer in the post-thyroidectomy period or after hormone discontinuation. METHODS: Retrospective study of patients aged 5-19 years who underwent WBS. Patient data collection included type and duration of withdrawal (liothyronine [L-T3], levothyroxine [L-T4], or post-thyroidectomy status without hormonal replacement) and TSH measured prior to WBS (level and timing)...
2016: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/27886341/clinical-efficacy-of-therapeutic-intervention-for-subclinical-hypothyroidism-during-pregnancy
#18
R Ju, L Lin, Y Long, J Zhang, J Huang
This study explored the effects of levothyroxine (L-T4) replacement therapy on pregnancy outcomes in patients with subclinical hypothyroidism (SCH). We analyzed the effects on pregnancy outcomes with respect to gestational week when the desired thyroid-stimulating hormone (TSH) level was reached as well as the length of time required to reach the target level during L-T4 treatment. This study enrolled 457 patients diagnosed with SCH upon initial thyroid function screening. Subjects were assigned to the treatment group (N = 184), and the control group (N = 273)...
November 21, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27849377/in-patients-with-subclinical-hypothyroidism-while-in-therapy-with-tablet-l-t4-the-liquid-l-t4-formulation-is-more-effective-in-restoring-euthyroidism
#19
Poupak Fallahi, Silvia Martina Ferrari, Alessandro Antonelli
OBJECTIVE: Levothyroxine (L-T4) is the standard therapy of hypothyroidism. Our purpose was to compare the effectiveness of the L-T4 liquid formulation with respect to L-T4 tablet in hypothyroid patients without malabsorption or drug interference. Twenty-one subjects with high thyroid-stimulating hormone (TSH) values under therapy with L-T4 tablets were switched to liquid L-T4 at the same dosage given 30 minutes before breakfast. RESULTS: TSH values significantly declined 2 months after from the switch to liquid L-T4, reaching the normal range in most cases...
February 2017: Endocrine Practice
https://www.readbyqxmd.com/read/27737898/diagnosis-of-endocrine-disease-how-reliable-are-free-thyroid-and-total-t3-hormone-assays
#20
REVIEW
Kerry J Welsh, Steven J Soldin
Hypothyroidism is a very common disorder worldwide, for which the usual treatment is monotherapy with levothyroxine (L-T4). However, a number of patients treated with L-T4 continue to report symptoms of hypothyroidism despite seemingly normal levels of thyroid-stimulating hormone (TSH), free-T3 (FT3) and free-T4 (FT4) measured by immunoassay. This review summarizes the limitations of the immunoassays commonly used to measure thyroid hormone levels and emphasizes the advantages of the role of liquid chromatography-tandem mass spectrometry (LC-MS/MS)...
December 2016: European Journal of Endocrinology
keyword
keyword
47068
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"