NU556 Week 4

Student Name

Purdue University Globle 

NU566 NP I – Introduction to Primary Care for the Nurse Practitioner

Prof. Name

Date

Evaluation of Suspected Hyperthyroidism and Thyroid Disease

A 65-year-old female presents with progressively worsening insomnia characterized by difficulty falling asleep and maintaining sleep for several months. Her symptoms, combined with unintentional weight loss, palpitations, frequent bowel movements, nervousness, tachycardia, hyperreflexia, hair thinning, and an enlarged thyroid gland, strongly suggest an underlying thyroid disorder, particularly hyperthyroidism or Graves’ disease. Appropriate laboratory testing and thyroid imaging are necessary to confirm the diagnosis and guide treatment.

History of Present Illness

The patient is a 65-year-old retired female who reports worsening sleep disturbances over the past several months. Initially, her insomnia occurred intermittently but has progressed to multiple nights each week. She experiences difficulty initiating sleep, often lying awake for one to two hours before falling asleep. Additionally, she consistently awakens between 2:00 AM and 3:00 AM and struggles to return to sleep. She describes herself as a light sleeper who is easily awakened by environmental noise.

Beyond insomnia, the patient reports increasing nervousness, unintended weight loss, intermittent palpitations, frequent bowel movements, heartburn, occasional headaches, nasal congestion, and rhinorrhea. She also notes progressive hair thinning. She 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.

Review of Systems

Constitutional

The patient reports:

• Progressive weight loss

• Nervousness

• Difficulty sleeping

She denies fever, fatigue, depression, or persistent anxiety.

Head and Neck

The patient reports occasional headaches without associated dizziness or vertigo. She denies neck pain, stiffness, or reduced range of motion.

Eyes, Ears, Nose, and Throat (EENT)

Positive findings include:

• Nasal congestion

• Runny nose

Negative findings include:

• Sinus pain

• Ear pain

• Tongue or lip swelling

• Vision changes

• Diplopia

• Blurred vision

• Difficulty swallowing

Cardiovascular

Positive findings include:

• Palpitations

Negative findings include:

• Chest pain

• Chest pressure

Respiratory

The patient denies:

• Shortness of breath

• Chest tightness

• Cough

Gastrointestinal

Positive findings include:

• Heartburn

• Frequent bowel movements

Negative findings include:

• Abdominal pain

• Nausea

• Vomiting

Hematologic/Lymphatic

The patient denies:

• Easy bruising

• Enlarged lymph nodes

Skin

The patient reports hair thinning but denies rashes, wounds, or changes in skin color.

Musculoskeletal

The patient denies:

• Muscle weakness

• Joint stiffness

• Extremity pain

• Changes in gait

Past Medical History

No known chronic medical conditions.

Surgical History

No previous surgical procedures.

Family History

The patient’s grandmother had thyroid disease.

Social History

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, or illicit drug use.

Allergies

No known drug allergies.

Current Medications

• Calcium supplement

• Multivitamin

Physical Examination

Vital Signs

General Appearance

The patient is alert, oriented to person, place, and time, and appears well developed and age appropriate. She is in no acute distress and appears non-toxic.

Head and Neck

The head is normocephalic. Neck range of motion is full without tenderness. Cervical lymph nodes are not enlarged. Examination reveals diffuse thyroid enlargement (goiter).

Eyes, Ears, Nose, and Throat

The tympanic membranes are pearly gray with intact landmarks bilaterally. Ear canals are patent. Pupils are equal, round, and reactive to light and accommodation. Sclerae are white. Nasal passages are patent without erythema or drainage. The oropharynx is clear without erythema, ulcers, or swelling.

Cardiovascular

Cardiac examination demonstrates tachycardia without murmurs. No carotid bruits are appreciated. There is no bilateral lower extremity edema.

Respiratory

Chest expansion is symmetrical. Lung fields are clear to auscultation bilaterally with normal percussion resonance and tactile fremitus.

Gastrointestinal

The abdomen is soft, non-distended, and non-tender with normoactive bowel sounds. No masses, hepatosplenomegaly, or costovertebral angle tenderness are present.

Skin

The skin is warm, dry, and intact without rashes or lesions.

Musculoskeletal and Neurological

Muscle bulk and tone are appropriate throughout. Deep tendon reflexes are hyperactive. No focal neurological deficits are noted.

Diagnostic Evaluation

The following diagnostic studies are indicated to determine the cause of the patient’s symptoms.

Laboratory Studies

• Thyroid-Stimulating Hormone (TSH)

• Free Thyroxine (Free T4)

• Free Triiodothyronine (Free T3)

• Total T3

• Total T4

• Thyroid-Stimulating Immunoglobulin (TSI)

Imaging

• Thyroid scan

Assessment

The patient’s clinical presentation strongly supports hyperthyroidism as the leading diagnosis. The combination of insomnia, unexplained weight loss, palpitations, tachycardia, hyperreflexia, enlarged thyroid gland, frequent bowel movements, and family history of thyroid disease is highly consistent with excessive thyroid hormone production. Graves’ disease remains the most likely underlying cause until diagnostic testing confirms the etiology.

Primary Diagnosis

Hyperthyroidism with Secondary Insomnia

Hyperthyroidism results from excessive production of thyroid hormones, leading to increased metabolic activity. Common manifestations include insomnia, tachycardia, weight loss, nervousness, tremors, heat intolerance, hyperreflexia, diarrhea, and thyroid enlargement. Many patients initially seek medical attention because of sleep disturbances before the endocrine disorder is recognized.

Differential Diagnoses

Graves’ Disease

Graves’ disease is the most common cause of hyperthyroidism and is an autoimmune disorder characterized by thyroid-stimulating antibodies. The patient’s enlarged thyroid gland, tachycardia, insomnia, weight loss, nervousness, increased bowel movements, and family history strongly support this diagnosis.

Toxic Goiter

An enlarged thyroid gland may result from diffuse or multinodular enlargement. Although goiter itself is not a diagnosis, it frequently reflects an underlying thyroid disorder such as Graves’ disease or toxic multinodular goiter. Thyroid imaging will help determine whether nodules are present.

Primary Insomnia

Primary insomnia should be considered; however, the presence of multiple systemic symptoms suggests that sleep disturbance is secondary to an endocrine disorder rather than an isolated sleep disorder.

Generalized Anxiety Disorder

Generalized anxiety disorder may contribute to insomnia and nervousness. Nevertheless, the objective findings of tachycardia, thyroid enlargement, hyperreflexia, and weight loss make hyperthyroidism substantially more likely than anxiety alone.

Management Plan

Diagnostic Follow-Up

Complete the recommended laboratory studies and thyroid scan to establish the diagnosis and determine the underlying cause of thyroid dysfunction.

Pharmacologic Management

If laboratory findings confirm hyperthyroidism, treatment options may include:

• Propylthiouracil (PTU)

• Methimazole (depending on patient-specific factors)

• Radioactive iodine therapy

• Beta-blocker therapy for symptomatic tachycardia

• Surgical thyroidectomy when clinically indicated

Specialist Referral

Refer the patient to an endocrinologist for comprehensive evaluation and long-term management, particularly if thyroid nodules or Graves’ disease are confirmed.

Lifestyle Recommendations

Advise the patient to:

• Maintain good sleep hygiene.

• Limit caffeine intake, particularly during the afternoon and evening.

• Continue regular physical activity while avoiding strenuous exercise if symptoms worsen.

• Consume a balanced diet that supports overall health.

• Report worsening palpitations, chest pain, or increasing neck swelling immediately.

Follow-Up

Schedule a follow-up appointment in four weeks to review laboratory findings, thyroid imaging results, establish a definitive diagnosis, and initiate appropriate treatment.

Key Clinical Takeaways

• Progressive insomnia in older adults should prompt evaluation for underlying medical conditions rather than being attributed solely to aging.

• Hyperthyroidism commonly presents with insomnia, weight loss, tachycardia, palpitations, nervousness, and increased bowel movements.

• Graves’ disease is the leading cause of hyperthyroidism and should be considered in patients with diffuse thyroid enlargement and compatible symptoms.

• TSH and free thyroid hormone levels remain the primary laboratory tests for diagnosing hyperthyroidism.

• Early diagnosis and treatment reduce the risk of cardiovascular complications, osteoporosis, and thyroid storm.

Frequently Asked Questions

What symptoms suggest hyperthyroidism in older adults?

Older adults with hyperthyroidism commonly experience insomnia, unexplained weight loss, palpitations, rapid heart rate, tremors, nervousness, increased bowel movements, heat intolerance, fatigue, and thyroid enlargement. Some individuals may present with subtle symptoms, making laboratory evaluation essential.

Why can hyperthyroidism cause insomnia?

Excess thyroid hormone overstimulates the nervous system, increasing metabolic activity and making it difficult to fall asleep or remain asleep. Many patients also experience nighttime palpitations, restlessness, and anxiety-like symptoms that disrupt normal sleep patterns.

Which laboratory tests confirm hyperthyroidism?

The initial evaluation includes serum TSH, free T4, and free T3 levels. Additional tests such as thyroid-stimulating immunoglobulin (TSI) and thyroid imaging help determine whether Graves’ disease or another thyroid disorder is responsible.

What is the difference between Graves’ disease and hyperthyroidism?

Hyperthyroidism describes excessive thyroid hormone production, while Graves’ disease is an autoimmune condition that commonly causes hyperthyroidism. Although Graves’ disease is the leading cause, other thyroid disorders can also produce elevated thyroid hormone levels.

When should an endocrinologist be consulted?

Referral is recommended when laboratory studies confirm hyperthyroidism, thyroid nodules are identified, Graves’ disease is suspected, symptoms are severe, or specialized treatment such as radioactive iodine or surgery may be necessary.

Hyperthyroidism should be suspected in patients presenting with persistent insomnia accompanied by weight loss, tachycardia, palpitations, hyperreflexia, frequent bowel movements, and thyroid enlargement. Diagnostic evaluation begins with TSH and thyroid hormone testing, followed by thyroid imaging when indicated. Early diagnosis and appropriate treatment improve symptom control and reduce long-term complications.

References

American Thyroid Association. (2023). Hyperthyroidism (overactive thyroid). https://www.thyroid.org/hyperthyroidism/

American Thyroid Association. (2023). Graves’ disease. https://www.thyroid.org/graves-disease/

Institute for Clinical Systems Improvement. (2022). Diagnosis and management of thyroid disease. https://www.icsi.org

Jameson, J. L., Fauci, A. S., Kasper, D. L., Hauser, S. L., Longo, D. L., & Loscalzo, J. (2022). Harrison’s principles of internal medicine (21st ed.). McGraw-Hill. https://accessmedicine.mhmedical.com

NU556 Week 4

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. (2023). Hyperthyroidism. https://www.niddk.nih.gov/health-information/endocrine-diseases/hyperthyroidism