View clinical trials related to Hypothyroidism.
Filter by:The investigators evaluate if there are radiation dosimetric parameters for the prediction of biochemical and clinical hypothyroidism after intensity-modulated radiation therapy (IMRT) for non-metastatic nasopharyngeal carcinoma (NPC).
The study aims to describe the changes in Levothyroxine dosage requirements in patients with hypothyroidism started on enteral feeding, and assess whether giving levothyroxine on empty stomach affects the mean percentage increase expected in Levothyroxine dosage in these patients.
Patients taking thyroid hormone replacement after thyroid removal surgery often report feeling differently than they did prior to taking thyroid hormone. The symptoms can include fatigue, worsening mood or subjective "brain fog" where the patient feels like their thinking is just not as sharp as it was previously. Multiple studies have found that patients taking thyroid hormone replacement have a diminished quality of life compared to matched controls. Previous studies have suggested that the type of deiodinase (DIO) polymorphism a patient has, which is responsible for converting the thyroid hormone T4 into the more biologically active T3, may contribute to their overall cognition and sense of well-being. The Investigators aim to determine if the type of deiodinase polymorphism a patient has contributes to the patient's cognition and overall sense of well-being after surgery and thyroid hormone replacement. Objective: Determine if patients with the deiodinase type 2 CC polymorphism have objective differences in working memory (N-back test is primary endpoint), cognitive function and sense of well-being after thyroidectomy when placed on standard thyroid hormone replacement therapy. Hypotheses: (1) Patients with the deiodinase type 2 CC polymorphism will have worse working memory (N-back test is primary endpoint), cognitive function and sense of well-being on standard thyroid hormone replacement therapy after thyroidectomy compared with before thyroidectomy. (2) Patients with the deiodinase type 2 TT or TC polymorphism will have no differences in working memory, cognitive function or sense of well-being on standard thyroid hormone replacement before and after thyroidectomy.
Patients that require treatment for cancers of the head and neck often require a combination of surgery and/or radiation and chemotherapy. Hypothyroidism is one of the most common complications, and has been associated with post-operative complications such as wound healing problems, fistula formation, and decreased quality of life and survival. Several studies have examined hypothyroidism after radiation to the head and neck, but few have examined this after non-thyroid head and neck surgery. Head and neck resection is theorized to devascularize the thyroid, thus resulting in post-operative hypothyroidism. Synthroid is a synthetic thyroid hormone often used in cases of patients with proven hypothyroidism and after surgical thyroid removal. It's use has been in effect and studied for over fifty years. Treatment algorithms for hypothyroidism are well published. However, treatment of subclinical hypothyroidism (elevated TSH with normal or near-normal T3/T4) is controversial. The rate of subclinical hypothyroidism after non-thyroid head and neck surgery is high (up to 20%), and is associated with post-operative complications as noted above. Therefore the investigators propose a double blinded randomized controlled trial comparing outcomes of patients that develop subclinical hypothyroidism after head and neck surgery, who are given a standardized dose of synthroid treatment versus those treated with placebo. The main outcomes to be examined are post-operative complications (wound healing issues, fistula formation), survival, and quality of life measures.
Based on accumulating evidences showing that hypothyroid status is associated with poor prognosis among acute myocardial infarction (AMI) patients, the study is designed to evaluate whether replacement treatment with levothyroxine could have beneficial effects on patients with AMI and hypothyroidism. This is a multicenter prospective computerized-randomized trial stratified by ejection fraction with a 1:1 ratio to levothyroxine group or standard therapy group.
Thyroid hormone is a key regulatory hormone for a range of physiological systems. An impaired function of the thyroid gland such as subclinical hypothyroidism (SCH) can affect quality of life. Older adults with subclinical hypothyroidism often report non-specific symptoms such as tiredness. In addition, muscle symptoms such as cramps, weakness and myalgia are more common in SCH than in healthy controls. At present, evidence is lacking about the benefits of thyroxine replacement in the elderly with SCH, as no large randomized clinical trials (RCT) on the full range of relevant clinical outcomes, including tiredness have been performed. Moreover, there is continued uncertainty about the long-term impact on health related quality of life of thyroxine treatment for SCH. The aim of the study is to examine, within a large RCT of elderly participants with subclinical hypothyroidism, the impact of thyroxine therapy on the association between subclinical thyroid disease (SCTD) and the level of physical and mental fatigue. The existing trial infrastructure (TRUST thyroid trial-Euresearch FP7; clinicaltrials.gov ID: NCT 01660126) will be utilized to collect information on the level of physical and mental fatigue by using the Pittsburgh Fatigability Scale at baseline and at 1 year from 220 participants with persistent subclinical hypothyroidism randomized to either thyroxine or placebo.
Rationale: During the last decades, research in possible therapies for existing obesity and developmental factors causing obesity has explosively increased. Recently renewed interest aroused for a tissue playing a possible role in both development and therapy for obesity: brown adipose tissue (BAT). To define the relation between BAT and thyroid hormone, the investigators set up the following research protocol. In this protocol BAT activity will be determined in subjects that underwent thyroidectomy for well-differentiated thyroid carcinoma. Objective: To study the effect of thyroid hormone and thyroid-stimulating hormone on brown adipose tissue activity. Study design: Determine BAT activity after thyroidectomy in well-differentiated thyroid carcinoma patients. Study population: Patients that underwent thyroidectomy for well-differentiated thyroid carcinoma, male and female, aged 18-65 years. Intervention: FDG-PET-CT-imaging ([18F]fluorodeoxyglucose positron-emission-tomography computed-tomography) of BAT activity will be performed under cold stimulation twice. For patients clinically withdrawn from thyroid hormone suppletion, the first occasion will be in a hypothyroid state within 4-6 weeks after thyroidectomy and the second measurement will take place in a euthyroid state 4 months after the start of thyroid hormone treatment. For patients receiving recombinant-thyroid-stimulating-hormone injections, the first occasion will be shortly after the injection in a state of high thyroid-stimulating hormone levels. The second measurement will be in a euthyroid state 4 months after the injection. Main study parameters/endpoints: The main endpoint of this study is the effect of thyroid hormone and thyroid-stimulating hormone on BAT activity in kBq (kilobecquerel) and SUV (standard uptake value). Secondary endpoints are the effects of thyroid hormone and thyroid-stimulating hormone on energy metabolism, body core temperature, skin surface temperatures and skin perfusion. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: The absorbed radiation dose from the FDG PET-CT scan after administration of 74 MBq (megabecquerel) of 18F-FDG is 2.8 mSv (miliSievert).
The aim of this study is to evaluate plasma adiponectin level, insulin resistance, cardiovascular risk and their correlation (if any) in patients with hypothyroidism and also to investigate the effect of levothyroxine on these parameters. The study may explore the lacunae in present treatment protocol and can suggest the possibilities of add-on therapies for a better management.
This study evaluates the effectiveness of stimulating the neurological segments c8-th5 in patients with latent hypothyroidism. One half of the participants will receive an osteopathic manuel treatment in order to stimulate the relevant segments, the other half will receive no treatment.
Subclinical hypothyroidism, defined as an elevated TSH in the setting of normal thyroid hormone levels, is a common diagnosis in the elderly. The purpose of this study is to examine the hypothalamic-pituitary-thyroid axis in men and women aged 70 years and older with persistent subclinical hypothyroidism. To evaluate the mechanism behind this condition, participants will undergo thyrotropin releasing hormone stimulation testing at 3 visits: baseline and while taking two different thyroid hormone preparations, levothyroxine and liothyronine. The investigators will also assess physiologic responses to these two different thyroid hormone medications to help us understand how the thyroid works in advanced age.