Thyroid disease Flashcards
Hyperthyroidism: Pathophysiology and etiology
- caused by excessive delivery of TH
- increased metabolic rate
- heightens sympathetic nervous systems response
HYPERTHYROIDISM ETIOLOGY
- autoimmune stimulation
- excess secretion of thyroid -stimulating (TSH)
- excessive intake of thyroid medications
HYPERTHROIDISM RISK FACTORS
- women (10 times more likely )
- Genetic factors
- family history of graves disease
- increased iodine intake
- age 20-40 years in age
HYPERTHYROIDISM CLINICAL MANIFESTATIONS
- increased appetite with weight loss
- hypermotile bowels
- heat intolerance, insomnia
- palpitations
- increased sweating
- hair changes (hair loss, brittle)
THYROIDITIS
- T4 and T3 levels initially elevated but over time become depressed
- recovery may be complete in weeks or months
- bacterial - treat with antibiotics or surgical drainage
- NSAIDS - progressing to corticosteroids if needed
- Propranolol or atenolol- may be used to treat cardiovascular symptoms R/T to hyperthyroid state
THYROID STORM ( THYROTOXIC CRSIS)
- extreme state of hyperthyroidism
- considered life threatening emergency, death rare when treatment started early
CLINICAL MANIFESTATIONS:
severe tachycardia, heart failure, shock, hyperthermia, restlessness, agitation, seizures, abdominal pain,N/V/D, delirium, and coma
THYROID STORM TREATMENT
- decreased circulating thyroid hormone levels with drug therapy
- managing respiratory distress
- fever reduction
- fluid replacement
- elimination or management of the initiating stressor
EXCESS TSH STIMULATION
- secondary form of hyperthyroidism - rare
- caused by over production of TSH by the pituitary gland and usually stimulates the thyroid gland to produce excess of thyroid hormone.
DRUG THERAPY
- Antithyroid Drugs
- Iodine
- Beta adrenergic blockers
RADIOACTIVE IODINE THERAPY
- damages or destroys thyroid tissue
- outpatient treatment-RAI given orally
- radioactive iodine is low - no radiation precations needed
- dryness and irritation of mouth and throat during treatment
- high incident of post treatment hypothyroidism in 80%
of cases
HYPERTHYROIDISM SURGERY
- subtotal - leaves about 10% of thyroid gland and the remainder of gland will produce adequate TH
- total- thyroid gland and patients will require lifelong hormone replacement
HYPERTHYROIDISM POST- OP COMPLICATIONS
- hypothyroidism
- hemorrhage
- damage to parathyroid glands - hypocalcemia
- injury laryngeal nerve -vocal cord paralysis
- infection
- respiratory distress
HYPERTHYROIDISM ASSESSMENT
- health history
- muscle strength , tremors
- size of thyroid
- eyes and vision
- cardiovascular(Afib)
- vital signs (inceased HR,BP,RR)
- bruit over thyroid
- integument (warm ,sweating)
HYPERTHYROIDISM NURSING DIAGNOSIS
- decreased cardiac output
- impaired comfort
- impaired health maintenance
- risk for infection
- imbalanced nutrition- less than body requirements
- disturbed body image
HYPERTHYROIDISM PLANNING
- patient reports improvement
- patient will describe situations requiring contact with the provider
- patient explains how to take medications
HYPERTHYROIDISM EVALUATION
- cardiac status will stabilize
- regains or maintains visual acuity
- takes in appropriate amount of calories per day
- communicates feeling about changes in body image
- explains importance of daily medication if required
HYPOTHYROIDISM PATHOPYSIOLOGY AND ETIOLOGY
- TH production decreases
- thyroid gland enlarges in attempt to produce more hormone
- hypothyroid state leads to myxedema
HYPOTHYROIDISM ETIOLOGY
PRIMARY:
- defects in gland , loss of thyroid tissue, antithyroid medications, thyroiditis, endemic iodine deficiency
SECONDARY:
- pituitary TSH deficiency or peripheral resistance to TH
- medications can cause
- common in women 30-60 years
HYPOTHYROIDISM RISK FACTORS
- more common in women older than 50 years
- relatives with autoimmune disorders
- history of thyroid surgery
- radiation of neck
- iodine deficiency
- hashimoto thyroiditis
HYPOTHYROIDISM
- hashimoto thyroiditis
- common cause of goiter and primary hypothyroidism
- autoimmune disorder- AB destroy tissue
HYPOTHYROIDISM CLINICAL MANIFESTATIONS
- slow onset
- goiter
- fluid retention and edema
- decreased appetite, weight gain
- constipation
- dry skin
- dyspnea
- slow HR
- menstrual problems
- pallor
- anemia
- cardiac enlargement
- abnormalities in lipid metabolism
- decreased taste, smell
- muscle stiffness
MYXEDEMA COMA
- untreated hypothyroidism triggered by factors
- life threatening
- severe metabolic disorder
- precipitated by: trauma, CNS depressants, failure to take medications, infection, exposure to cold
PHARMOCOLOGIC THERAPY FOR HYPOTHYROIDISM
-levothyroxine(senthroid)
HYPOTHYROIDISM
HEALTH HISTORY:
- onset, severity of symptoms
- diet, use of ionized salt
- pituitary diseases (secondary hypothyroidism)
- treatment of hyperthyroidism
PHYSICAL ASSESSMENT:
- muscle strength, deep tendon reflexes(decreased)
- vital signs, cardiovascular, integument (decreased)
- thyroid gland, weight
HYPOTHYROIDISM NURSING DIAGNOSIS
- decreased cardiac output
- constipation
- risk for impaired skin integrity
- impaired body image
- impaired nutrition
- fatigue, fall risk
HYPOTHYROIDISM PLANNING
- pulse and BP
- arrhythmias controlled
- skin remains intact, warm and dry
- free of edema
- activities resumed with normal heart rate
- elimination pattern returns to normal
HYPOTHYROIDISM IMPLEMENTATION
- monitor cardiac output
- monitor BP,apical, peripheral pulses
- monitor respiratory rate, breath sounds(crackles)
- avoid becoming chilled
- explain need to alternate periods of rest/activity
- prevent constipation
- encourage fluid intake 2000ml /day
- high fiber diet
- increase activity
HYPOTHYROIDISM EVALUATION
- determine whether patient has met expectations
- make changes to care plan if not
- repeat diagnostic tests to ensure proper medication level
HYPOTHYROIDISM NURSING CONSIDERATIONS
maintain skin integrity
- monitor skin for redness, lesions
- provide and teach immobile patients measures to promote circulation
- implement ROM exercises
- provide and teach patient to maintain skin integrity
WHAT IS THE THYROID
-small saddle shaped gland that wraps around the anterior portion of the trachea
PRIMARILY EFFECTS: metabolism cardiovascular gastrointestinal neuromuscular
DIAGNOSTIC TESTS
- thyroid antibodies (TA) test
- TSH test (sensitivity)
- T4
- T3
- T3 uptake test
- RAI uptake test (thyroid scan )
- thyroid suppression test
GRAVES DISEASE
- most common cause of hyperthyroidism
- autoimmune disorder(presence of MG/PA)- antibody in serum binds to TSH receptors in thyroid follicles causing hyperfunction
- enlarged thyroid gland (goiter)
- manifestations of hyperthyroidism
EXOPHTHALMOS
- graves disease
- eye pain
- blurred vision
- diplopia
- lacrimation and photophobia
- increased risk of corneal dryness, irritation and ulceration
TOXIC MULTINODULAR GOITER
- develops slowly, usually in women 60-70
- no opthalmopathy nor dermopathy clinical manifestations
- small, independently functioning nodules
THYROIDITIS
- subacute granulomatous-viral infection
- acute thyroiditis- bacterial or fungal
- acute disorder that may become chronic,resulting in a hypothyroid state as the repeated infections destroy the thyroid gland tissue
THYROIDITIS TREATMENT
- T4 and T3 levels initially elevated but over time become depressed
- recovery may be complete in weeks or months
- bacterial treat with antibiotics or surgical drainage
- NSAIDS progressing to corticosteroids if needed
- propranolol (inderal) and atenolol (Tenormin) may be used to treat cardiovascular symptoms r/t hyperthyroid state
THYROID STORM TREATMENT
- decrease circulating thyroid hormone levels with drug therapy
- managing respiratory distress
- fever reduction
- fluid replacement
- elimination or management of the initiating stressors
HYPERTHYROIDISM POST-OP NURSING CARE
- standard post op care protocols
- assess patient for signs of hemorrhage or tracheal compression
- place patient in semi-fowlers position and support the patients’s head with pillows
- avoid flexion of the neck and tension on suture line
HYPOTHYROIDISM NURSING CONSIDERATIONS
- maintain skin integrity
- provide and teach immobile patients measures to promote circulation
- implement ROM exercises
- provide and teach patient to maintain skin integrity