Nursing Assessment of the Endocrine System (Test 2) Flashcards
What are lipid soluble hormones also known as?
Steroid hormones.
Classifications and functions: lipid soluble hormones- ?
Adrenal cortex, sex glands, thyroid
What are water soluble hormones also known as?
Protein base.
Classifications and functions- water soluble hormones?
All other hormones
What is the third group of hormones?
Reproduction/stress/metabolism/growth
Hormone transport
Lipid soluble hormones are bound to plasma proteins for transport
What are the 2 types of hormone receptors?
Steroid “ “ and Protein “ “
Where is the steroid hormone receptor located?
Inside the cell
What does the protein hormone receptor do?
Hormone attaches to receptor on cell membrane “first messenger” which stimulates the production of a “second messenger” that activates intracellular activity
What is simple feedback?
Gland increase/decreases the secretion of a hormone based on feedback (ex: insulin/glucose)
What is positive feedback?
Increases target organ action beyond normal
What is complex feedback?
Communication among several glands to regulate hormone secretion (ex: thyroid)
What is nervous system control?
Initiated by CNS and implemented by sympathetic nervous system (ex: stress/catecholamines)
What are rhythms?
Hormones fluctuate in predictable patterns during 24 hour period (ex: cortisol)
What hormones types make up the hypothalamus?
Inhibiting and releasing hormones
What do inhibiting hormones do?
Inhibit the secretion of hormones from the anterior pituitary.
What are examples of inhibiting hormone?
Somatostatin; prolactin-inhibiting hormone
What do releasing hormones do?
Stimulates the secretion of hormones from the anterior pituitary.
What are examples of releasing hormones?
Corticotropin-releasing hormone; growth hormone-releasing factor
What hormones are in the anterior pituitary?
Tropic hormones, growth hormone, prolactin
What do tropic hormones do?
Control the secretion of hormones by other glands
What are examples of tropic hormones?
Thyroid-stimulating hormone (TSH); adrenocorticotropic hormone (ACTH); follicle-stimulating hormone (FSH)
What hormones are in the posterior pituitary?
Antidiuretic hormone (ADH), and oxytocin
What does ADH do? What is this stimulated by?
Regulates fluid volume by stimulating reabsorption of water in the renal tubules. Stimulated by increased plasma osmolality.
ADH also is…?
A potent vasoconstrictor.
What does oxytocin do?
Stimulates milk secretion and uterine contraction.
What hormones are in the thyroid gland?
Thyroxine (T4), triiodothyronine (T3), and calcitonin
What do T4 and T3 do?
Regulate metabolic rate of all cells and processes of cell growth
What do low levels of T4 and T3 cause?
Stimulate pituitary gland to release TSH
What does calcitonin do?
Inhibits calcium loss from bone, increases calcium storage in bone, and increase renal excretion of calcium and phosphorus
What hormone is in the parathyroid gland?
Parathyroid hormone (PTH)
What does PTH stimulate?
Stimulates bone desorption and inhibits bone formation; stimulates renal conversion of vitamin D
What does PTH increase?
Calcium reabsorption and phosphate excretion in kidneys
What 2 things make up the adrenal gland?
Adrenal medulla and adrenal cortex
What hormones are in the adrenal medulla?
Catecholamines (epinephrine, norepinephrine, dopamine); stress response
What hormones are in the adrenal cortex?
Cortisol, aldosterone, adrenal androgens
What does cortisol do?
Regulates blood glucose concentration, anti-inflammatory action, promotes metabolism
What does aldosterone do?
Maintains extracellular fluid volume, promotes renal reabsorption of sodium and excretion of potassium
What do adrenal androgens?
Promotes masculinization in men and growth and sexual activity in women
What hormones are in the pancreas?
Glucagon and insulin
What does glucagon do?
Increases blood glucose by stimulating glycogenesis, glycogenesis, and ketogenesis
What is insulin stimulated by?
Increased blood glucose level
What does insulin facilitate?
Glucose transport into cells
Normal aging results in what 4 things?
Decreased hormone production and secretion, altered hormone metabolism and biologic activity, decreased responsiveness of target tissue to hormones, alterations in circadian rhythms
*Changes of aging often mimic what?
The manifestation of endocrine disorders
What system is less developed at birth than any other system in the body?
Endocrine
Hormonal control of many body functions is lacking until when?
12-18 months
Infants may manifest what as a result of lack of hormonal development?
Imbalances in fluids, electrolytes, amino acids, glucose, and other trace substances as a result of this lack of development
What things are important to know about past health history?
Previous or current endocrine abnormalities, abnormal patterns of growth and development
What medications are important to know they are taking?
Hormone replacement, insulin, corticosteroids
What is important to know when gathering info about surgery/other treatment?
Neck or brain involvement of increased importance
If kids aren’t getting good growth and weigh percentile numbers, it leads us to what?
Endocrine problems
ADH is released by what?
The pituitary gland
Where is ADH made?
Hypothalamus
What does ADH prevent?
The production of dilute urine
What is something to remember about COPD patients when gathering medication info?
A lot are on long term steroids
In what assessments may you find abnormalities when assessing the system of a person with endocrine problems?
Vital signs, height and weight, mental-emotional status, integument, head, neck, thorax, abdomen, extremities, genitalia (esp. hair distribution)
Common assessment abnormalities?
Changes in skin texture, exophthalmos, moon face, polyuria/polydipsia, goiter, changes in weight, lethargy, thermoregulation
What are the changes in skin texture caused by?
Hypo/hyperthyroidism
What is exophthalmos caused by?
Hyperthyroidism
What is moon face caused by?
Cushing syndrome
What is polyuria/polydipsia caused by?
DM, DI
What are goiters caused by?
Hypo/hyperthyroidism
What are changes in weight caused by?
Hypo/hyperthyroidism; DM
What is lethargy caused by?
Hypothyroidism
What are thermoregulation problems caused by?
Hypo/hyperthyroidism
What are MRIs used for?
Used to find tumors?, measure tumors, and evaluate for metastasis
What should you inform the patient about MRIs?
That the test is painless and noninvasive, and they will need to lie still
What is a computed tomography (CT scan) used for?
To identify tumors or cysts
What do you need to tell the patient about the CT scan?
They will need to lie still
What should you do if an IV contrast will be used?
Check for iodine allergy
Questions to ask for MRIs?
Are you claustrophobic? Do you have on any jewelry? Do you have metal implants or staples? Etc.
What do ultrasounds do?
Evaluates thyroid nodules to determine if they are cysts or tumors
What do you need to explain about ultrasounds?
Explain the painless procedure will take about 15 minutes
Do you need to fast or be sedated for ultrasounds?
No
What is the most sensitive diagnostic test for evaluating thyroid dysfunction?
TSH
What is the normal range of TSH?
0.4-4.2 microunits/milliliter
What should you explain about the TSH test?
Explain blood draw procedure to patient
What is a T4 test used for?
To evaluate thyroid function and monitoring thyroid function
What is the normal range of T4?
4.6-11.0 micrograms/deciliter
What should you explain about the T4 test?
Explain blood draw procedure to patient
What is a T3 test helpful in?
Diagnosing hyperthyroidism in T4 levels are normal
What is the normal T3 range for ages 20-50?
70-204 nanograms/deciliter
What is the normal T3 range for ages 50 plus?
40-181 nonograms/deciliter
What should you explain to the patient about T3 tests?
Explain blood draw procedure to patient
What is a thyroid scan used for?
To evaluate thyroid nodules
What is given during a thyroid scan?
Radioactive isotopes are given orally or IV thyroid is scanned
What does a normal thyroid look like in a scan?
Homogenous pattern
What do benign nodules look like in a scan?
Appear as warm spots
What do malignant nodules look like in a scan?
Appear as cold spots (meaning they won’t absorb meds)
What should you check before doing a thyroid scan?
Check for iodine allergy
What should patients not have before a thyroid scan?
Shouldn’t have supplemental iodine for several weeks before
For what tests should you minimize salt intake (iodine)?
Thyroid scan and radioactive iodine uptake (RAIU)
What do RAIUs provide?
Direct measurement of thyroid activity
What is the patient given for a RAIU?
Radioactive iodine orally or IV
When is the thyroid scanned during a RAIU?
At several time intervals
What should you check for before a RAIU?
Check for iodine allergy
What should be avoided before a RAIU?
No supplemental iodine for several weeks before the test
What can interfere with RAIU results?
Thyroid medications
Which is more common, RAIU or blood draws?
Blood draws, RAIUs aren’t used much
What does cortisol evaluate?
Adrenal cortex function
What is the normal range of cortisol at 8am?
5-23 micrograms/deciliter
What is the normal range of cortisol at 4pm?
3-16 micrograms/deciliter
What time is the most accurate cortisol test collected?
In the morning
What is important to remember to write on the sample?
Mark sample time of specimen vial
What does fasting blood glucose measure?
Measures circulating glucose level
What is the normal range for a fasting blood glucose test?
70-99 milligrams/deciliter
How long should they fast for a FBG test?
4-8 hours
Is water intake allowed for a FBG test?
Yes
What should you ensure when giving a FBG test?
Ensure no dextrose in IV solution
What is a Glycosylated Hemoglobin test also known as?
HGB A 1 C
What does Hgb A1C measure?
Glucose control during previous 3 months
What is the normal range for a Hgb A1C test?
4-6%
Is fasting necessary for an Hgb A1C?
No
What does a ketone test measure?
Amount of acetone secreted in urine as result of incomplete fat metabolism
What does a positive ketone result indicate?
Can indicate lack of insulin and diabetic acidosis
How is a ketone test done?
Completed with freshly voided urine sample
What other test is a ketone test often done with?
Glucose test
When do we usually see ketones?
In diabetics without insulin
How else can ketones be tested for?
Blood
Theories link cause of DM to single/combo of what factors?
Genetic, autoimmune, environmental, viral
What are the two most common types of DM?
Type 1 and 2
What other types of DM are there?
Gestational, prediabetes, secondary diabetes
Normal insulin metabolism is produced by what?
The beta cells (weird B looking letter)
What are the beta cells made of?
Islets of Langerhans (pancreas)
How is normal insulin released?
Released continuously into the bloodstream in small increments with larger amounts released after food intake
What does normal insulin stabilize glucose range to? (Aka what’s the ideal glucose range?)
70-120 mg/dl
What is the average daily secretion of normal insulin?
0.6 units/kg body weight
What does insulin promote? What does this cause?
Glucose transport from bloodstream across cell membrane to cytoplasm of cell. Causes decrease of glucose in the bloodstream.
What does increased insulin after a meal stimulate?
Storage of glucose as glycogen in liver and muscle
What does increased insulin after a meal inhibit?
Gluconeogenesis
What does increased insulin after a meal enhance?
Fat disposition
What does increased insulin after a meal also increase?
Protein synthesis
What are insulin dependent tissue examples?
Skeletal muscles and adipose tissues
What are non insulin dependent tissue examples?
Brain, liver, blood cells
What is the definition of non insulin dependent tissues?
Do not depend directly on insulin for glucose support
What do counterregulatory hormones oppose?
Oppose effects of insulin
What do counterregulatory hormones increase?
Blood glucose levels
What do counter regulatory hormones provide?
A regulated release of glucose for energy
What do counter regulatory hormones help?
Help maintain normal blood glucose levels
What are examples of counterregulatory hormones?
Glucagon, epinephrine, growth hormone, cortisol
What is the incidence rate of DM?
15 per 100,000 people in North America
What are the peak ages of onset for females and males?
Between 10 and 12 for girls, and 12 to 14 for boys (puberty)
What factor increases the risk for DM?
If the child or adolescent has a first degree relative or identical twin with the disease, but it’s not for sure going to happen though
What type of diabetes may show a familial tendency?
Type 1
Theories for DM disease development include?
Genetic components, environmental influences such as viruses, and an autoimmune response that causes the destruction of insulin-secreting cells of the pancreas in the islets of Langerhans
What is type 1 DM formerly known as?
Juvenile onset or insulin dependent diabetes
What age bracket does type 1 usually occur in?
Most often occurs in people under 30 years of age
When is the peak onset of type 1?
10-14
What do the body’s T cells do?
Attack and destroy beta cells which are the source of insulin
What do antibodies to the islet cells cause?
80-90% reduction of normal beta cell function leads to hyperglycemia and diagnosis of type 1 DM
What is the onset of disease like for type 1?
Long preclinical period
What are present before symptoms occur for type 1?
Antibodies present for months to years before symptoms occur
When do manifestations develop for type 1?
When pancreas can no longer produce insulin
After manifestations of type 1, what happens?
Rapid onset of symptoms and present as ER with ketoacidosis
What does type 1 history include?
Recent, sudden weight loss
What are classic symptoms of type 1?
Polydipsia, polyuria, polyphagia
What is polydipsia?
Excessive thirst
What is polyphagia?
Excessive hunger
Does eating more stop the weight loss of type 1 onset?
No, even though you eat a lot, you are still losing weight (15-20 pounds)
What does type 1 diabetes require?
Exogenous insulin to sustain life
When does DKA occur?
Occurs in absence of exogenous insulin (absolutely no insulin)
Is DKA life threatening?
Yes
What does DKA result in?
Metabolic acidosis
When is prediabetes also known as?
Impaired glucose tolerance (IGT) or impaired fasting glucose (IFG)
Fasting blood glucose levels
Higher than normal (over 100 mg/dl, but under 126 mg/dl)
Impaired glucose tolerance 2 hour plasma glucose
Higher than normal (between 140 and 199 mg/dl)
Why is pre diabetes not just diabetes?
Not high enough for diabetes diagnosis
What does having pre diabetes increase your risk for?
Type 2
If no preventative measure is taken about the pre diabetes, what usually happens?
Develop diabetes within 10 years
Does damage occur with pre diabetes?
Long term damage already occurring to heart and blood vessels
How does pre diabetes appear?
Usually present with no symptoms
What do you need to do with a patient that has pre diabetes?
Must watch for diabetes symptoms
What is the most prevalent type of diabetes?
Type 2
What is the percentage of patients with type 2 of all diabetes types?
Over 90%
What age bracket does type 2 usually occur in?
Over 35
How many patients with type 2 are overweight?
80-90%
Type 2 prevalence increases with…?
Age
What type of basis does type 2 have?
Genetic basis
What ethnic populations have an increased rate of type 2?
African Americans, Asian Americans, Hispanic Americans, and Native Americans
What ethnic populations have the highest rate of diabetes in the world?
Native Americans and Alaskan Natives
What are HCPs finding more and more of?
Children with type 2 diabetes, a disease usually diagnosed in adults aged 40 years and older
What may be major contributors to the increase in type 2 diabetes during childhood or adolescence?
The epidemics of obesity and the low level of physical activity among young people
Why is type 2 difficult in children?
It can go undiagnosed for a long time and children often have mild/no symptoms
In type 2 what does the pancreas do?
Continues to produce some endogenous insulin
The insulin produced in a patient with type 2 is…?
Is either insufficient or poorly utilized by tissues
What is the most powerful risk factor for type 2?
Obesity (abdominal/visceral)
???What genetic mutations are related to type 2?
Lead to insulin resistance and increased risk for obesity
What are the 4 major metabolic abnormalities r/t type 2?
Insulin resistance, pancreas’ decreased ability to produce insulin, inappropriate glucose production from liver, and alteration in production of hormones and adipokines
What happens in insulin resistance?
Body tissues don’t respond to insulin and insulin receptors are either unresponsive or insufficient in number
What happens when pancreas has decreased ability to produce insulin?
Beta cells are fatigued from compensating and beta cells mass lost
What happens from inappropriate glucose production from liver?
Liver’s response of regulating release of glucose is haphazard, and it is not considered a primary factor in development in type 2
What does alteration in production of hormones and adipokines do?
Play a role in glucose and fat metabolism and contribute to pathophysiology of type 2; two main adipokines- adiponectin and leptin
What kind of onset is type 2?
Gradual onset
A person may go with with undetected..?
Hyperglycemia
What from hyperglycemia may become severe?
Osmotic fluid/electrolyte loss or hyperosmolar coma
What is probably the number one way people get diagnosed as type 2?
Improper wound healing
What are clinical manifestations of type 2?
Nonspecific conditions (may have classic symptoms of type 1), fatigue, recurrent infections, recurrent vaginal yeast or candida infections, prolonged wound healing, visual changes
When does gestational diabetes develop?
During pregnancy
When is gestational diabetes detected?
At 24 to 28 weeks
Usually normal glucose levels at…?
6 weeks postpartum
What does GD increase risk for?
Increased risk for C section, perinatal (baby) death, and neonatal complications
Why do these increased risks exist?
Because these babies grow at much faster rates and causes those risks
After having GD, it increases risk for what?
Risk for developing type 2 in 5 to 10 years
What is therapy for GD?
1st nutritional, 2nd insulin
What puts you at higher risk for GD?
Excessive weight gain and family diabetes history
Secondary diabetes results from what?
Another medical condition: Cushing syndrome, hyperthyroidism, pancreatitis, parenteral nutrition, cystic fibrosis, hematochromatosis, corticosteroids (Prednisone), thiazides, phenytoin (Dilantin, which is a long term antiseizure)
When does secondary diabetes resolve?
Usually resolves when underlying condition is treated
Diagnosing diabetes- Hgb A1C level
over 6.5%
Diagnosing diabetes- fasting plasma glucose level
Over 126 mg/dl
Diagnosing diabetes- OGTT 2 hour plasma glucose level
200 mg/dl
Diagnosing diabetes- random plasma glucose level
Over 200 mg/dl in a patient with classic symptoms of hyperglycemia
Nursing history type of assessment for DM patients?
Past health history (viral infections, medications (esp. steroids, antibiotics, etc.), recent surgery), positive health history, obesity
If a patient with DM is obese, what will the doctor probably do?
Probably start yearly fasting glucose checks and more often if they have a family history
Stress and sugar relationship?
Stress of illness or injury makes sugar levels increase, if you keep it between 70-120 mg/dl it helps wound healing
What do you say if a patient asks why they are getting fingersticks and they’re not diabetic?
Stress of illness or injury makes sugar levels increase, if you keep it between 70-120 mg/dl it helps wound healing
What do we assess during physical assessment for DM patients?
Weight loss, thirst, hunger, poor healing, Kussmaul respirations (rapid breathing and a sign of DKA)
Nursing diagnoses for DM?
Ineffective therapeutic regimen management, risk for injury, risk for infection, powerlessness, imbalanced nutrition: more than body requirements
What is important to remember about DM as a nurse?
Managing diabetes takes a lot of discipline, so put yourself in your shoes before you judge
What are overall goal examples during the planning period for DM?
Active patient participation (and family and SO’s if applicable), few or no episodes of acute hyperglycemic emergencies or hypoglycemia, maintain normal blood glucose levels, prevent or delay chronic complication, lifestyle adjustments with minimal stress
Health promotion for implementation phase for DM?
Identify those at risk, routine screening for overweight adults over age 45 (FPG is preferred method in clinical settings
Acute intervention for implementation phase for DM?
Hypoglycemia, DKA, Hyperosmolar hyperglycemic nonketotic syndrome
Acute intervention for stress of illness and injury for DM?
Increase blood glucose level, continue regular meal plan, increase intake of noncaloric fluids, continue taking oral agents and insulin, frequent monitoring of blood glucose at least every 4 hours and ketone testing if glucose is over 240 mg/dl
Patients undergoing surgery or radiologic procedures requiring contrast medium should…?
Hold their metformin (glucophage) day of surgery and 48 hours, (begun after serum creatinine has been checked and is normal???)
What is the overall goal of ambulatory and home care?
To enable patient or caregiver to reach an optimal level of independence
When implementing insulin therapy and oral agents in ambulatory and home care what do you need to do?
Provide education of proper administration, adjustment, and side effects; assessment of patient’s response to therapy
When implementing personal hygiene in ambulatory or home care what do you need to do?
Regular bathing with emphasis on foot care, and daily brushing/flossing (dentist should be informed about diabetes diagnosis*)
What is important about medical identification and travel card for DM patients?
Must carry id indicating diagnosis of diabetes
What is important about patient and family teaching for DM?
Educate on disease process, physical activity, medications, monitoring blood glucose, diet, resources; enable patient to become most active participant in his/her care
What is exogenous insulin?
Insulin from an outside source
Who may take exogenous insulin?
Required for type 1, prescribed for type 2 who can’t control blood glucose by other means
What is the only type of insulin used today?
Human insulin
How is human insulin prepared?
Prepared through genetic engineering- common bacteria (Escherichia coli) and yeast cells using recombinant DNA technology
Insulins differ in regard to what 4 things?
Onset, peak, action, and duration
What are insulins characterized as?
Rapid, short, intermediate, and long acting
Different types in insulin may be used for…?
Combination therapy
Examples of rapid acting insulin?
Lispro (Humalog), Aspart (Novolog), and glulisine (Apirdra)
Examples of short acting insulin?
Regular
Examples of intermediate acting insulin?
NPH (cloudy)
Examples of long acting insulin?
Glargine (Lantus), detemir (Levemir)
What is a basal-bolus regimen?
Closely mimics endogenous insulin production
What is given for a basal-bolus?
Long acting (basal) once a day and rapid/short acting (bolus) before meals
How are rapid acting (bolus) prepared/onset?
Injected 0-15 minutes before meals, onset of action 15 minutes
How are short acting (bolus) prepared/onset?
Injected 30-45 minutes before meal, onset of action 30-60 minutes