Name
Purdue University Globle
NU566 NP I – Introduction to Primary Care for the Nurse Practitioner
Prof. Name
Date
Hyperthyroidism should be considered in a 65-year-old woman who presents with persistent insomnia, unexplained weight loss, palpitations, tachycardia, nervousness, frequent bowel movements, hyperreflexia, and diffuse thyroid enlargement. The combination of these symptoms strongly suggests excessive thyroid hormone production, with Graves’ disease being an important possible cause. The initial diagnostic evaluation includes serum thyroid-stimulating hormone (TSH) and free thyroxine (free T4) testing, with free T3, thyroid-stimulating immunoglobulin (TSI), and thyroid imaging used when clinically indicated. Early recognition and treatment can improve sleep and cardiovascular symptoms while reducing the risk of complications such as atrial fibrillation, osteoporosis, and thyroid storm.
The patient is a 65-year-old retired woman who reports progressively worsening insomnia over several months. Her sleep difficulties began intermittently but have increased to multiple nights per week. She often takes one to two hours to fall asleep and regularly awakens between 2:00 AM and 3:00 AM, with difficulty returning to sleep. She describes herself as a light sleeper who is easily disturbed by environmental noise.
In addition to sleep disturbance, she reports increasing nervousness, unintentional weight loss, intermittent palpitations, frequent bowel movements, heartburn, occasional headaches, nasal congestion, rhinorrhea, and progressive hair thinning. These symptoms raise concern for an underlying endocrine disorder, particularly hyperthyroidism.
The patient denies depression, excessive anxiety, fever, dizziness, vertigo, neck pain, vision changes, chest pain, dyspnea, abdominal pain, nausea, vomiting, muscle weakness, gait abnormalities, skin rashes, or swollen lymph nodes.
The patient reports progressive weight loss, nervousness, and difficulty sleeping. She denies fever, fatigue, depression, or persistent anxiety.
She reports occasional headaches without associated dizziness or vertigo. She denies neck pain, stiffness, or limited range of motion.
Positive findings include nasal congestion and rhinorrhea. She denies sinus pain, ear pain, tongue or lip swelling, vision changes, diplopia, blurred vision, or difficulty swallowing.
The patient reports intermittent palpitations. She denies chest pain and chest pressure.
She denies shortness of breath, chest tightness, and cough.
Positive findings include heartburn and frequent bowel movements. She denies abdominal pain, nausea, and vomiting.
The patient denies easy bruising and enlarged lymph nodes.
She reports progressive hair thinning but denies rashes, wounds, or changes in skin color.
The patient denies muscle weakness, joint stiffness, extremity pain, or gait changes.
The patient has no known chronic medical conditions.
She reports no previous surgical procedures.
The patient’s grandmother had thyroid disease. This family history supports the need to investigate an underlying thyroid disorder, although it does not independently establish a diagnosis of Graves’ disease.
The patient is retired and maintains an active lifestyle. She walks daily, plays tennis every weekend, and regularly socializes with friends. She denies tobacco, alcohol, and illicit drug use.
The patient has no known drug allergies. Her current medications and supplements include:
Calcium supplement
Multivitamin
| Measurement | Result |
|---|---|
| Height | 5 ft 7 in |
| Weight | 126 lb |
| Temperature | 99°F |
| Blood pressure | 130/72 mmHg |
| Heart rate | 102 beats/min |
| Respiratory rate | 14 breaths/min |
| Oxygen saturation | 94% |
The heart rate of 102 beats/min indicates tachycardia, an important objective finding in a patient with suspected hyperthyroidism.
The patient is alert and oriented to person, place, and time. She appears well developed and age appropriate, with no acute distress or toxic appearance.
The head is normocephalic. Neck range of motion is full without tenderness. Cervical lymph nodes are not enlarged. Examination reveals diffuse thyroid enlargement, consistent with a goiter.
The tympanic membranes are pearly gray with intact landmarks bilaterally. Ear canals are patent. Pupils are equal, round, and reactive to light and accommodation. The sclerae are white. Nasal passages are patent without erythema or drainage. The oropharynx is clear without erythema, ulcers, or swelling.
Cardiac examination demonstrates tachycardia without murmurs. No carotid bruits or bilateral lower extremity edema are present.
Chest expansion is symmetrical. Lung fields are clear to auscultation bilaterally. Percussion resonance and tactile fremitus are normal.
The abdomen is soft, nondistended, and nontender, with normoactive bowel sounds. No masses, hepatosplenomegaly, or costovertebral angle tenderness are present.
The skin is warm, dry, and intact without rashes or lesions.
Muscle bulk and tone are appropriate throughout. Deep tendon reflexes are hyperactive. No focal neurological deficits are noted.
The purpose of diagnostic testing is to determine whether the patient has biochemical hyperthyroidism and identify the underlying cause. Although her clinical presentation is strongly suggestive, laboratory results are required to confirm thyroid dysfunction.
Serum TSH is the recommended initial test for suspected primary hyperthyroidism. A low or suppressed TSH level suggests excessive thyroid hormone activity and should be interpreted alongside free T4 and, when necessary, free T3.
Free T4 and free T3 help establish the severity and biochemical pattern of thyroid hormone excess. In overt primary hyperthyroidism, TSH is generally low while free T4 and/or free T3 are elevated. Some patients have T3-predominant hyperthyroidism, making free T3 particularly useful when free T4 is normal but clinical suspicion remains high.
Additional laboratory studies may include:
Total T3 and total T4 when clinically indicated.
Thyroid-stimulating immunoglobulin (TSI) or thyrotropin receptor antibodies (TRAb) when Graves’ disease is suspected.
Complete blood count and liver function testing when antithyroid medication is being considered, based on the selected treatment and clinical circumstances.
TSI or TRAb testing can help identify autoimmune Graves’ disease. The choice of additional tests should be guided by the initial thyroid hormone results and the suspected cause.
A radioactive iodine uptake and thyroid scan may be used to determine the cause of hyperthyroidism when the diagnosis is not clear from laboratory testing and clinical assessment. Increased diffuse uptake may support Graves’ disease, while focal areas of increased uptake may suggest toxic nodular disease.
Thyroid ultrasound is particularly useful when a thyroid nodule is suspected, when the gland requires structural evaluation, or when radioactive iodine testing is inappropriate. Ultrasound assesses thyroid anatomy but does not, by itself, confirm the biochemical diagnosis of hyperthyroidism.
The leading diagnosis is suspected primary hyperthyroidism with secondary insomnia. The patient’s progressive sleep disturbance occurs alongside unintentional weight loss, nervousness, palpitations, tachycardia, frequent bowel movements, hyperreflexia, and diffuse goiter. This combination is more suggestive of thyroid hormone excess than isolated insomnia or an anxiety disorder.
Graves’ disease is a leading suspected cause because it can produce diffuse thyroid enlargement and systemic manifestations of increased thyroid activity. However, the etiology cannot be confirmed without appropriate diagnostic testing.
Hyperthyroidism occurs when the body is exposed to excessive thyroid hormone activity. These hormones increase metabolic processes and influence cardiovascular, neurological, gastrointestinal, and sleep functions.
The patient’s symptoms are consistent with this disorder:
Insomnia and difficulty maintaining sleep.
Unintentional weight loss.
Nervousness and restlessness.
Tachycardia and palpitations.
Frequent bowel movements.
Hyperreflexia.
Hair thinning.
Diffuse thyroid enlargement.
Sleep disturbance may be an early or prominent complaint, particularly when excess thyroid hormone increases sympathetic nervous system activity and causes nighttime restlessness or palpitations.
Graves’ disease is an autoimmune disorder in which antibodies stimulate the TSH receptors of the thyroid gland, causing increased thyroid hormone production. It is a common cause of hyperthyroidism and may produce diffuse goiter, palpitations, weight loss, nervousness, heat intolerance, and increased bowel movements.
The patient’s diffuse thyroid enlargement and systemic symptoms make Graves’ disease an important diagnostic consideration. TSI or TRAb testing and, when appropriate, radioactive iodine uptake testing can help establish the cause.
Toxic multinodular goiter and toxic adenoma cause hyperthyroidism through excessive hormone production by one or more autonomously functioning thyroid nodules. These conditions become increasingly relevant with advancing age.
The patient’s thyroid enlargement requires evaluation for nodules. A thyroid scan can help distinguish diffuse thyroid stimulation from focal or patchy areas of increased hormone production.
Thyroiditis can cause a temporary release of preformed thyroid hormones, producing symptoms of thyrotoxicosis. Unlike Graves’ disease, thyroiditis generally involves low radioactive iodine uptake during the thyrotoxic phase.
Thyroiditis is less clearly supported by this patient’s gradual symptoms and diffuse goiter, but it remains part of the broader differential diagnosis.
Primary insomnia involves persistent difficulty falling asleep, staying asleep, or obtaining restorative sleep without another condition adequately explaining the symptoms.
Although the patient has significant insomnia, her weight loss, tachycardia, palpitations, frequent bowel movements, and hyperreflexia suggest a possible medical cause. Thyroid evaluation should therefore occur before attributing her sleep disturbance to primary insomnia alone.
Generalized anxiety disorder may cause excessive worry, nervousness, and sleep disturbance. However, the objective findings of tachycardia, diffuse thyroid enlargement, weight loss, and hyperreflexia make hyperthyroidism an important medical explanation to investigate before diagnosing anxiety as the primary cause.
Complete the initial thyroid laboratory evaluation and determine whether thyroid imaging is indicated. The results should be reviewed alongside the physical examination and clinical history to establish the diagnosis and identify the cause.
A repeat assessment should include heart rate, symptom progression, medication and supplement review, and any signs of cardiovascular complications.
Treatment depends on the confirmed cause, severity of symptoms, comorbidities, and patient preferences.
A beta-blocker may be prescribed to reduce symptoms such as tachycardia, palpitations, and tremors while the underlying thyroid disorder is being treated. The patient’s heart rate, blood pressure, respiratory status, and contraindications should be assessed before administration.
Methimazole is generally the preferred antithyroid medication for many adults with Graves’ disease, including older adults, unless a specific contraindication or clinical circumstance applies.
Propylthiouracil (PTU) may be used in selected situations, such as certain pregnancy-related circumstances or when methimazole is unsuitable. PTU carries important liver toxicity risks and is not routinely preferred over methimazole for most nonpregnant adults.
Radioactive iodine therapy is an established treatment option for appropriate patients with Graves’ disease or toxic nodular hyperthyroidism. It reduces thyroid hormone production by damaging overactive thyroid tissue. Patient-specific factors, thyroid anatomy, and contraindications must be considered.
Surgical thyroidectomy may be considered for patients with large goiters, compressive symptoms, suspicious nodules, certain medication contraindications, or other indications requiring definitive treatment.
Referral to an endocrinologist is recommended when hyperthyroidism is confirmed, Graves’ disease is suspected, thyroid nodules are identified, symptoms are significant, or definitive therapy may be required.
Given the patient’s age and cardiovascular symptoms, prompt evaluation is appropriate.
The patient should be advised to:
Maintain a consistent sleep schedule and practice good sleep hygiene.
Limit caffeine, particularly in the afternoon and evening.
Avoid strenuous exercise if palpitations, weakness, or other symptoms worsen.
Continue appropriate light physical activity as tolerated.
Maintain adequate nutrition and hydration to support health during unintentional weight loss.
Report worsening palpitations, chest pain, shortness of breath, fainting, or increasing neck swelling promptly.
Sleep hygiene can help manage insomnia, but it should not replace evaluation and treatment of an underlying thyroid disorder.
Arrange timely follow-up to review thyroid function tests and any imaging results. A four-week follow-up may be appropriate for this case plan, but the actual interval should be individualized according to symptom severity, test results, and treatment initiation.
Patients beginning antithyroid medication may require earlier clinical review and repeat thyroid function testing according to the treatment plan. Persistent tachycardia or worsening symptoms should prompt earlier assessment rather than waiting for the scheduled appointment.
Persistent insomnia accompanied by unexplained weight loss, palpitations, tachycardia, and thyroid enlargement warrants evaluation for hyperthyroidism.
TSH and free T4 are the primary initial laboratory tests for suspected primary hyperthyroidism.
Free T3, TSI or TRAb, and thyroid imaging may help determine the diagnosis and underlying cause.
Graves’ disease is an important cause of diffuse goiter and excessive thyroid hormone production.
Toxic multinodular goiter is another important consideration in older adults with thyroid enlargement and hyperthyroidism.
Beta-blockers can help control symptoms, while antithyroid medication, radioactive iodine, or surgery may treat the underlying disorder.
Early diagnosis and treatment can reduce the risk of atrial fibrillation, bone loss, and thyroid storm.
Older adults may experience weight loss, palpitations, tachycardia, insomnia, nervousness, increased bowel movements, heat intolerance, tremors, fatigue, or thyroid enlargement. Some older adults develop less typical symptoms, so clinicians should consider thyroid testing when unexplained systemic changes occur.
Excess thyroid hormone increases metabolic activity and can stimulate the cardiovascular and nervous systems. This may cause restlessness, palpitations, increased alertness, and difficulty falling asleep or staying asleep. Treating the underlying thyroid disorder may improve sleep.
The initial evaluation usually includes TSH and free T4. Free T3 is useful when T3-predominant hyperthyroidism is suspected. TSI or TRAb testing can help identify Graves’ disease. A diagnosis should be based on laboratory findings interpreted with the clinical presentation.
Hyperthyroidism describes excessive thyroid hormone production or activity. Graves’ disease is an autoimmune condition that commonly causes hyperthyroidism by stimulating the thyroid gland. Other causes include toxic multinodular goiter, toxic adenoma, and thyroiditis.
An endocrinologist should be considered when hyperthyroidism is confirmed, Graves’ disease is suspected, thyroid nodules are identified, symptoms are severe, or specialized treatment such as radioactive iodine or surgery is being considered.
Hyperthyroidism is the leading suspected explanation for this patient’s progressive insomnia, unintentional weight loss, palpitations, tachycardia, hyperreflexia, frequent bowel movements, and diffuse thyroid enlargement. Graves’ disease is an important possible cause, but laboratory testing is necessary before confirming the diagnosis.
The initial evaluation should include TSH and free T4, with additional thyroid hormone testing, antibody studies, and imaging when indicated. Appropriate treatment and follow-up can improve symptoms, address the underlying thyroid disorder, and reduce the risk of cardiovascular and skeletal complications.
American Thyroid Association. (n.d.). Hyperthyroidism (overactive thyroid). https://www.thyroid.org/hyperthyroidism/
American Thyroid Association. (n.d.). Graves’ disease. https://www.thyroid.org/graves-disease/
Jameson, J. L., Fauci, A. S., Kasper, D. L., Hauser, S. L., Longo, D. L., & Loscalzo, J. (Eds.). (2022). Harrison’s principles of internal medicine (21st ed.). McGraw Hill. https://accessmedicine.mhmedical.com/
McCance, K. L., & Huether, S. E. (2023). Pathophysiology: The biologic basis for disease in adults and children (9th ed.). Elsevier. https://www.elsevier.com/
National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.). Hyperthyroidism (overactive thyroid). https://www.niddk.nih.gov/health-information/endocrine-diseases/hyperthyroidism
Ross, D. S., Burch, H. B., Cooper, D. S., Greenlee, M. C., Laurberg, P., Maia, A. L., Rivkees, S. A., Samuels, M., Sosa, J. A., Stan, M. N., & Walter, M. A. (2016). 2016 American Thyroid Association guidelines for diagnosis and management of hyperthyroidism and other causes of thyrotoxicosis. Thyroid, 26(10), 1343–1421. https://doi.org/10.1089/thy.2016.0229
