Exam 3: Endocrine Function Alterations Flashcards
Endocrine System plays a vital role in:
Orchestrating cellular interactions, metabolism, growth, reproduction, aging, and response to adverse conditions
Coordinating/regulating long term changes in fxn of all body organs and tissues to maintain homeostasis
Endocrine involves a ___ ___ system
Negative Feedback System
4 categories of hormones
Amines and amino acids
Peptide (protein): act on cell surface
Steroid: act inside the cell
Fatty acid derivative
Major Hormone Secreting Glands
Hypothalamus
Pineal
Pituitary
Thyroid
Parathyroid
Adrenals
Islets of Langerhans (Pancreas)
Posterior Pituitary Gland
Regulates fluid balance, facilitates childbirth, and prostate gland function
What 2 hormones does the Posterior Pituitary release?
ADH/Vasopressin
Oxytocin
Anterior Pituitary Gland
Produces and release several different hormones (most of which regulate secretion of other hormones)
Important Anterior Pituitary Hormone
TSH - Thyroid Stimulating Hormone
Stimulates the thyroid gland which will then determine the rate of cellular metabolism
Thyroid Gland
Determines rate of CELLULAR METABOLISM
In children, hormones are responsible for normal development of skeletal, muscular, and nervous system
Thyroid Hormones
ACTH - Adrenocorticotropic Hormone
FSH - Follicle Stimulating Hormone
LH - Luteinizing Hormone
PRL - Prolactin
GH - Growth Hormone
Calcitonin
Thyroxine (T4) and Triiodothyronine (T3)
Parathyroid Glands
Monitor and maintain circulating concentration of CALCIUM IONS
Pancreas
Endocrine Gland AND Organ
REGULATES BLOOD GLUCOSE concentrations and is associated with DM
Adrenal Medulla
INCREASES CELLULAR ENERGY USE and muscular strength, endurance, and mobilizes energy reserves
What hormones does the Arenal Medulla Release?
Catecholamines (EP & NEP)
Mobilized glycogen reserves
Adrenal Cortex
Hormones that play a vital role for bodies survival and affects metabolism of many different tissues
Adrenal Cortex Hormones
Glucocorticoids: cortisol, corticosterone, etc
Female Gonads and Hormones
Regulates secondary sexual characteristics and reproduction
Ovaries (Gonads)
Estrogen (Hormones)
Male Gonads and Hormones
Regulate secondary sexual characteristics and reproduction
Testes (Gonads)
Androgens and FSH (Hormones)
Common Lab Tests for Endocrine Disorders
Pituitary - GH and water deprivation test
Thyroid - TSH, T3, T4
Parathyroid - Serum calcium and Phosphate
Adrenal - Cortisol, Aldosterone, Urinary 17 Ketosteroids
Urine Tests
Measure the amount of hormones or end products of hormones excreted by the kidneys
Stimulation Tests/Suppression Tests
Diagnostic tests for endocrine disorders
Endocrine Imaging Studies
MRI
CT
Thyroid Scan
Radioactive Iodine (RAI) Uptake Test
Purpose of the POSTERIOR Pituitary Gland
Regulate fluid balance, facilitates childbirth and prostate gland function via ADH/Vasopressin and oxytocin
Hypersecretion of the Posterior Pituitary Gland Causes
SIADH
Hyposecretion of the Posterior Pituitary Gland causes
Diabetes Insepidus
Hypophysis
Pituitary Gland
95% of Pituitary Gland tumors are …
Benign
Surgery to Correct the Pituitary Gland is called…
Hypophysectomy
The most common Posterior Pituitary disorder is
Diabetes Insipidus (DI)
Anterior Pituitary Gland Purpose
To produce and release several different hormones like FSH, LH, prolactin, ACTH, TSH, GH
HYPERsecretion of the Anterior Pituitary Gland causes
Cushing Syndrome
Gigantism
Acromegaly
HYPOsecretion of the Anterior Pituitary Gland causes
Dwarfism
Panhypopituitarism
SIADH
Syndrome of inappropriate antidiuretic hormone
Posterior Pituitary Gland - Hyperexcretion
Excessive amount of serum ADH, resulting in water intoxication and hyponatremia
Causes of SIADH
Malignant tumors on the POSTERIOR Pituitary Gland
Hypersecretion of ADH by the hypothalamus
Ventilation (increased intrathoracic pressure)
Trauma
Pain
Stress
Assessment Findings of SIADH
Fluid volume excess
Thirst
Neurologic changes r/t swelling of brain cells
Seizures
NO edema (it’s between the cellular and extracellular spaces)
Increased BP
Crackles
Distended jugular veins
I > O
Weight gain
Diagnostic/Lab Tests for SIADH
High URINE osmolality
Low SERUM osmolality
decreased H&H, BUN, Na Levels (Hyponatremia)
Nursing Dx for SIADH
FLUID OVERLOAD
Alteration in thought process
insufficient nutrients
fatigue
Nursing Education for SIADH
Information about the disease process
Medications are lifelong
Oral intake plan (fluid and sodium)
Daily weight
Nursing Interventions for SIADH
Restrict oral fluids including ice chips to 800 mL/day
Monitor intake/output
Monitor serum sodium, and urine osmolality, and specific gravity
Weigh daily
Assess changes on LOC, cognition
Meds: Declomycin, Vasopressin, Diuretics
Diabetes Insipidus (IS/DI)
Results from excessive water loss caused by hyposecretion of ADH or kidney’s inability to respond to ADH –> polyuria –> severe dehydration
Assessment Findings for DI
Assess for hx of head injury, brain surgery, infection, or tumor
Medication list
Assess LOC
VS (hypotension)
Skin turgor
I&O
Weight (loss)
Polydipsia
Polyuria
Bowel sounds (constipation) (from dehydration)
Diagnostic/Lab Tests for DI
Low urine osmolality
Positive water deprivation test
Hypernatremia (increased sodium)
Nursing Dx for DI
Dehydration (most common)
Reduced cardiac output
potential for interrupted skin integrity
possible constipation
Nursing Education for DI
Information about disease process
Medic Alert bracelet
Keep I&O log
Weight
skin care
normal bowel elimination
Nursing Interventions for DI
monitor I&O hourly
weight daily - report weight loss!!!
monitor urine labs!!!
encourage fluid intake greater than urine output !!!
skin protection PRN
meds: Supplemental ADH, replacement IV fluids
What UO should be reported to a provider with DI
UO greater than 200 m/hr for 2 consecutive hours or one hour with over 500 mL
Thyroid Hormones
T3
T4
Calcitonin
___ is contained in thyroid hormone
iodine
What controls the release of thyroid hormones
TSH from the anterior pituitary gland
Largest gland in the body is
the thyroid
The thyroid gland controls…
cellular metabolic activity
Which is more potent and rapid acting T3 or T4
T3
When is calcitonin released from the thyroid gland
in response to high plasma calcium levels and it increase calcium deposit in bones
What shape is the Thyroid gland
butterfly shaped in the neck
HPT Axis
Hypothalamic - pituitary - thyroid axis
Hypothalamus –(TRH)–> stimulate pituitary gland to release TSH –> Stimulates thyroid to release T3/4–>high levels of T3/4 feedback loops to inhibit TRH production and release (negative feedback)
Grave’s Disease
excessive secretion of thyroid hormone from the thyroid gland, leading to increased basal metabolic rates
rates higher in women than men
hyperthyroidism
Assessment findings for Grave’s Disease
clinical manifestation’s vary depending on amount and time:
assess health hx, VS, neck (goiter), eyes (exophthalmos), resp effort increase, energy level, irritability, weight pattern, sleep pattern
potential thyroid storm/crisis
Thyroid Storm/Crisis/Thyrotoxicosis
Life threatening extreme hyperthyroidism from long term stress or manipulation of the gland
s/s include elevated temp (fever above 101.3), extreme tachycardia (above 100), and other exaggerated hyperthyroid s/s and neuro changes
Tx for Thyroid Storm
acetaminophen (ASA would displace thyroid hormone from proteins and make things worse)
hypothermia mattress
ice packs
cool environment
IV fluids
beta blocker, propanolol/inderal
antithyroid medications/PTU
Diagnostic/Lab Tests
elevated T3, T4, free T4
Decreased TSH
positive RAI uptake scan and thyroid scan
Nursing Dx for Grave’s Disease
possible reduced CO
disturbances in vision
threat to airway
insufficient nutrients
Nursing interventions for Grave’s Disease
related to lifelong antithyroid medications: ablative radioactive I-131, or partial/total thyroidectomy
meds: antithyroid meds for life (potassium iodide, Tapazole, and/or PTU)
Patient Education for Grave’s Disease
Medication usage and LIFELONG usage
Daily weight
environment temp cool and stress free
activity-rest balance
Patient Education for Grave’s Disease patients with Exophthalmos
Eye protection and potential altered visual field
regular eye exam
report any changes in vision or appearance
eye protection
moisten eyes
elevate HOB
eye patch at night
What sort of diet should Grave’s disease have
high carbohydrate and protein diet including snacks (burns fast)
What is a common tx (non-med) for Grave’s Disease (Hyperthyroidism)
Ablative radioactive I-131
OR
Thyroidectomy (partial or total)
Ablative radioactive I-131
thyroid gland absorbs I-131 which destroys some thyroid cells over a period of 6-8 weeks
Never do an ablative radioactive I-131 on…
someone pregnant
Always be using what during a Ablative radioactive I-131
RADIATION PRECAUTIONS
Patient Instructions for Ablative radioactive I-131
Drink with a straw
use a private toilet
no handling others food
avoid contact with persons (no children)
use disposable utensils and plates
What may be done once an ablative radioactive I-131 is performed
once thyroid hormone levels out it may indicate a thyroidectomy, but the hyperthyroidism needs treatment before surgery options
Pre-Op Patient Education for a thyroidectomy
Deep breathing cough
instruct to hold hands behind neck during cough, sitting and turning (supports neck and gland region)
teach to expect hoarseness
instruct on wound care pre and post op
Post Op Patient Education for a thyroidectomy
provide comfort/pain
monitor for hemorrhage
promote patent airway
prevent tetany (hypocalcemia)
maintain patent IV
avoid/minimize talking: Assess for laryngeal nerve damage
prevent infection
monitor for hypothyroidism