exams 2 study guide Flashcards
wha is pernicious anemia
- Caused by a LACK of INTRINSIC FACTOR made by the gastric parietal cells which is required for vitamin B12 absorption
so basically the body cannot absorb vitamin b12 leading to =
- vitamin B12 deficiency
when can pernicious anemia also occur
- after GI surgery (i.e., gastrectomy, gastric bypass, small bowel resection involving the ileum)
- In strict vegetarians since most of vitamin B12 come from meat
- Excessive alcohol or smoking
- More common in elderly than in younger patients*
what are some typical anemia symptoms
- Neurologic manifestations due to nerve demyelination
- Loss of appetite, abdominal pain, beefy red tongue (atrophic glossitis), icterus, splenic enlargement
- Treatment
Parenteral or high oral doses of vitamin B12
Often unrecognized in older adults due to subtle, slow onset and presentation
what is the Neurologic manifestations due to nerve demyelination of pernicious anemia
Weakness, paresthesias of feet and hands, ↓ vibratory and position senses, ataxia, muscle weakness, and impaired thought processes
what are some treatment for pernicious anemia
- Parenteral or intranasal administration of Vit B12 is the treatment of choice
- Patients will die in 1-3 years without treatment
- Long-standing neuromuscular complications may not be reversible
- Increasing dietary cobalamin does not correct this anemia if intrinsic factor is lacking or if there is impaired absorption in the ileum
Dose: 1000 mg of cobalamin IM daily for 2 weeks and then weekly until the Hgb is normal, then monthly for life
Common causes of Folic Acid Deficiency Anemia (absence of neurological problems)
- dietary deficiency (leafy greens, citrus fruits)
- Malabsorption syndromes ( celiac disease, chron’s disease, small bower resection)
- Increased requirement (i.e., pregnancy
- drugs
- alcohol abuse and anorexia
- loss during hemodialysis
what is celiac disease
- genetic autoimmune disease
- people can’t eat gluten because it will damage their small intestine
- Gluten is a protein found in wheat, rye bread, and barley. It may also be in other products like vitamins and supplements, hair and skin products, toothpastes, and lip balm
- affects each person differently and can occur in digestive system or other parts of the body
treatment of celiac disease
glutten free diet
other characteristics of celiac disease
- One person might have diarrhea and abdominal pain, while another person may be irritable or depressed.
- Irritability is one of the most common symptoms in children.
- Some people have no symptoms.
what is Folic Acid Deficiency
- Serum folate level is low but vit b12 is normal
treatment of folic acid deficiency
We can treat them by replacement therapy or eat the food with larger amount of folic acid
- In malabsorption states or with chronic alcoholism, up to 5 mg per day may be required.
- During diagnostic studies, the gastric analysis is positive for hydrochloric acid.
treatment of folic acid deficiency
We can treat them by replacement therapy or eat the food with larger amount of folic acid
- In malabsorption states or with chronic alcoholism, up to 5 mg per day may be required.
- During diagnostic studies, the gastric analysis is positive for hydrochloric acid.
what are Iron Deficiency Anemia
- Most common type of anemia worldwide
- Nutritional iron deficiency
- Metabolic or functional deficiency
Symptomatic hemoglobin level for iron deficiency anemia
Symptomatic @ Hgb 7-8 g/dl
Progression of iron deficiency causes:
- Brittle, thin, coarsely ridged, spoon-shaped nails
- A red, sore, painful tongue
treatment goal of iron deficiency anemia
Treat underlying disease that is causing reduced intake or absorption of iron
how to replace iron in iron deficiency anemia
- Nutritional therapy
- Oral iron supplements if adequate nutrition
- Transfusion of packed RBCs
what is normocytic anemia
Anemia resulting from blood loss may be caused by either acute or chronic problems
- It means you have normal-sized red blood cells, but you have a low number of them
Acute blood loss occurs as a result of
Acute blood loss occurs as a result of sudden hemorrhage
Sources of chronic blood loss are similar to?
those of iron-deficiency anemia
how does the body respond when acute blood loss is gradual
- the body maintains its blood volume by slowly increasing the plasma volume, but then the number of RBCs is significantly DIMINISHED
Causes of sudden hemorrhage/ acute blood loss
- Trauma
- Complications of surgery
- Conditions or diseases that disrupt vascular integrity
conditions that disrupt vascular intergrity
- Hypovolemic shock
- Compensatory increased plasma volume with diminished O2 -carrying RBCs
- Hypovolemic shock is an emergency condition in which severe blood or other fluid loss makes the heart unable to pump enough blood to the body
Some causes of chronic blood loss:
Bleeding ulcer
Hemorrhoids
Menstrual and postmenopausal blood loss
Management of chronic blood loss involves
Identifying the source
Stopping the bleeding
Providing supplemental iron as needed
complications of blood transfusions
- Fluid overload
- Blood-borne infection
- Exposure to donor leukocytes
what is blood transfusion
Not linked into one baseline hemoglobin level but recommended for people with hematocrit level of < 30
- Benefits/risks weighed
blood transfusion reactions
- Incompatibility, Major - - Acute hemolytic transfusion reaction
- Febrile reaction
- Allergic reaction
- Hypocalcemia
- Bleeding
- Hypothermia – ventricular dysrhythmias
Laboratory Tests for Red Blood Cells
- Red blood cell count (RBC)
- Percentage of reticulocytes (normally approximately 1%)
- Hemoglobin (grams per 100 mL of blood)
- Hematocrit
what is Red blood cell count (RBC)
measures the total number of red blood cells in 1 mm3 of blood
what is Percentage of reticulocytes (normally approximately 1%)
Provides an index of the rate of red cell production
what is Hemoglobin (grams per 100 mL of blood) test
Measures the hemoglobin content of the blood
what is Hematocrit test
Measures the volume of red cell mass in 100 mL of plasma volume
what is Sickle Cell Disease
Inherited structural abnormality in the hemoglobin
- Crystal-like, elongated, rigid cell causes occlusion in the microcirculation
- Sickling in response to cold, dehydration, hypoxia, infection, and acidosis
Clinical presentation
of sickle cell disease
- Severe bone pain
- Microinfarcts in many organs, leading to cardiomegaly, renal failure, and chronic leg ulcers
- Pulmonary infarction leading to HTN and possible ARDS
Treatment of Sickle Cell Crisis
- Oxygen administration
- Aggressive intravenous fluid hydration
- Prompt treatment of infection with broad-spectrum antibiotics
- RBC transfusions are not usually required
- Pain control with around-the-clock narcotics
- Folic acid supplementation
- Hydroxyurea
- Hematopoietic stem cell transplantation (HSCT) is promising towards finding a cure for Sickle Cell Disease
Aging and Red Blood Cells
Reduction in hematopoietic progenitors
- Reduced production of hematopoietic growth factors
- Inhibition of erythropoietin
- Inflammatory cytokines interfere with erythropoietin interaction with its receptors.
-erythropoitin is a hormone. hematopoeiten is the process
what is Polycythemia Vera
A condition in which the red blood cell mass is increased.
what is Relative polycythemia:
results from a loss of vascular fluid and is corrected by replacing the fluid
what is Primary polycythemia:
a proliferative disease of the bone marrow with an absolute increase in total red blood cell mass accompanied by elevated white cell and platelet counts
what is Secondary polycythemia
is caused by other disease processes that induce hypoxia. For these, the underlying cause is treated. These include: chronic heart and lung disease, living at high altitude, sleep apnea.
examples of conditions that leads secondary polycepthemia
- chronic heart
- lung disease
- living at high altitude
- sleep apnea
Polycythemia Manifestations
Variable and related to an increase in RBCs, hemoglobin level, and hematocrit with increased blood volume and viscosity
- Splenomegaly
- Depletion of iron
- Disrupted cardiac output
- Hypertension
- Decreased cerebral blood flow
- Venous stasis
- Thromboembolism and hemorrhage
Treatment of Polycythemia
- Prevention of thrombosis
- Therapeutic serial phlebotomy
- Treatment with hydroxyurea
- Watch for progression to acute leukemia
what are Leukemias
Malignant neoplasms arising from the transformation of a single blood cell line derived from hematopoietic stem cells
Classifications of leukemia according to cell lineage
- Lymphocytic (lymphocytes)
- Myelocytic (granulocytes, monocytes)
what are Chronic Leukemias
Malignancies involving the proliferation of well-differentiated myeloid and lymphoid cells
Types of chronic leukemia
- Chronic lymphocytic leukemia (CLL)
- Chronic myelogenous leukemia (CML)
what leukemias involve the pluripotent myeloid stem cells in bone marrow and interfere with the maturation of all blood cells.
- Acute myelogenous (myeloblastic) leukemia (AML)
- Chronic myelogenous leukemia (CML)
what leukemias involve immature lymphocytes and their progenitors in the bone marrow, the spleen, lymph nodes, CNS, and other tissue.
- Acute lymphocytic (lymphoblastic) leukemia (ALL)
- Chronic lymphocytic leukemia (CLL)
what is Thrombocytopenia
Results from a decrease in platelet production, increased sequestration of platelets in the spleen, or decreased platelet survival
types of thrombocytopenia
- Drug-induced thrombocytopenia
- Idiopathic thrombocytopenic purpura
- Thrombotic thrombocytopenic purpura
in vitamin K deficiency,
the liver produces inactive clotting factor resulting in abnormal bleeding.
Manifestations of Thrombocytopenia
Mucous membranes
Nose, mouth, gastrointestinal tract, and uterine cavity
Commonly occurs in small vessels
Petechiae—pinpoint purplish-red spots
Seen almost exclusively in conditions of platelet deficiency
Purpura—purple areas of bruising
Hemorrhagic telangiectasia
An uncommon autosomal dominant disorder characterized by thin-walled, dilated capillaries and arterioles
Vitamin C deficiency (scurvy) bleeding
Results in poor collagen synthesis and failure of the endothelial cells to be cemented together properly, causing a fragile wall
what is Cushing disease
Causes protein wasting and loss of vessel tissue support because of excess cortisol
what is Senile purpura
(bruising in elderly persons)
- Caused by the aging process
Five Stages of Hemostasis
- Vessel spasm
- Formation of the platelet plug
- Blood coagulation or development of an insoluble fibrin clot
- Clot retraction
- Clot dissolution
what is Thrombosis
the inappropriate formation of clots within the vascular system
what is Bleeding
Failure of blood to clot in response to appropriate stimulus
Vascular Constriction
- Vessel spasm constricts the vessel and reduces blood flow. It is a transient event that usually lasts minutes or hours.
- Vessel spasm is initiated by endothelial injury and caused by local and humoral mechanisms.
Clot Retraction and Dissolution
The process involves the interaction of substrates, enzymes, protein cofactors, and calcium ions that circulate in the blood or are released from platelets and cells in the vessel wall.
another name for Disseminated intravascular coagulopathy (DIC)
Known as the “clotting-bleeding syndrome”
facts about Disseminated intravascular coagulopathy (DIC)
Clotting cascade is triggered, causing widespread systemic intravascular clotting
- ITS LIMITED, WHEN USED UP CAUSES MICROCLOTS
release of kinins
increases vascular permeability and causes hypotension and shock
Fibrin and fibrinogen breakdown causes
increase in fibrin degradation products and D-dimers
what activates Disseminated intravascular coagulopathy (DIC)
- Burns
- Bacterial endotoxins (especially gram-negative)
- Heat stroke
conditions associated with Disseminated intravascular coagulopathy (DIC)
- Obstetric conditions
- Cancers
- Infections
- Shock
- Trauma or surgery
- Low-flow states
treatment of Disseminated Intravascular Coagulation DIC
- Treat the causative factor
- Correct hypotension, hypoxemia, and acidosis
- Medications Heparin FFP Platelets Cryoprecipitate
what are Infectious Mononucleosis
Self-limited lymphoproliferative disorder
Causes and Characteristics
of mononucleosis
- Caused by the B-lymphocytotropic EBV, a member of the herpes virus family; transmitted in saliva
- Characterized by fever, generalized lymphadenopathy, sore throat, and the appearance in the blood of atypical lymphocytes and several antibodies
- Highest incidence in adolescents and young adults
- Treatment is symptomatic and supportive.
what is Hodgkin disease
Lymphoma arises in a single node or chain of nodes.
what is Non-Hodgkin disease
Lymphoma originates at extranodal sites and spreads to anatomically contiguous nodes.
Reed-Sternberg cells are derived from?
B lymphocytes
Reed-Sternberg cells are present in what disease
Hodgkin disease
Stage A of Hodgkin Disease
Lack constitutional symptoms
Stage B of Hodgkin Disease
- (40% of persons with Hodgkin disease)
- Significant weight loss, fevers, pruritus, or night sweats
Advanced Stages of hodgkin disease
- Fatigue and anemia
- Liver, lungs, digestive tract, and CNS may be involved.
Low-grade lymphomas of Non-Hodgkin Lymphomas
Predominantly B-cell tumors
Intermediate-grade lymphomas of Non-Hodgkin Lymphomas
Include B-cell and some T-cell lymphomas
High-grade lymphomas Non-Hodgkin Lymphomas
Largely immunoblastic (B cell), lymphoblastic (T cell), Burkitt, and non-Burkitt lymphomas
Staging of Non-Hodgkin Lymphomas Disease
- Bone marrow biopsy
- Blood studies
- Chest and abdominal CT scans
- Nuclear medicine studies
- Cytologic examination of the cerebrospinal fluid
Treatment for Hodgkin and NHL
- Radiation
- Combination chemotherapy
Non-Hodgkin Lymphomas Disease treatment ONLY
- Adjuvant radiation therapy
- Monoclonal antibodies
what is Multiple Myeloma
A plasma cell dyscrasia characterized by expansion of a single clone of immunoglobulin-producing plasma cells and a resultant increase in serum levels of a single monoclonal immunoglobulin or its fragments
main site involved in Multiple Myeloma
- The bones and bone marrow
- Proliferation and activation of osteoclasts that lead to bone resorption and destruction
- Pathologic fractures
- Hypercalcemia
what is Pleural effusion:
abnormal collection of fluid in the pleural cavity
- Transudate or exudate, purulent (containing pus), chyle, or sanguineous (bloody)
Spontaneous Pneumothorax
Occurs when an air-filled blister on the lung surface ruptures
what is Traumatic Pneumothorax
Caused by penetrating or nonpenetrating injuries
- accidents airbag hitting chest, hard hit on chest, blow, stabbing, gunshot
what is Tension Pneumothorax
occurs when the intrapleural pressure exceeds atmospheric pressure
types of fluid in pleural effusion
- Transudate
- Exudate
- Purulent drainage (empyema)
- Chyle
- Blood
what is Atelectasis
The incomplete expansion of a lung or portion of a lung
causes of atelectasis
- Airway obstruction
- Lung compression such as that occurs in pneumothorax or pleural effusion
- Increased recoil of the lung due to loss of pulmonary surfactant
types of atelectasis
- Primary = present birth
- Secondary = Develops in the neonatal period or later in life
what is transudative pleural effusion
- occurs due to increased hydrostatic pressure or low plasma oncotic pressure
LOW IN PROTEIN AND LDH
examples of transudative pleura effusion
- CHF
- cirrhosis
- nephrotic sundrome
- pulmonary edema
- Hypoalbuminemia
what is exudative pleural effusion
occurs due to inflammation and increased capillary permeability
HIGH IN PROTEIN AND LDH
examples of exudative pleural effusion
- pneumonia
- viral infection
- pe
- autoimmune
what is Asthma
A chronic inflammatory disease of the airways that causes hyperresponsiveness, mucosal edema, and mucus production
AFFECTS THE AIRWAYS
Genetic Factors Involved in the Pathophysiology of Asthma
- Atopy
- Early versus late phase
Atopy refers to the genetic tendency to develop allergic diseases
Factors Involved in the Pathophysiology of Asthma
Environmental
Viruses
Allergens
Occupational exposure
Contributing Factors to an Asthmatic Attack
-Allergens
-Respiratory tract infections
Exercise
Drugs and chemicals
Hormonal changes and emotional upsets
Airborne pollutants
Gastroesophageal reflux
Classifications of Asthma Severity
Mild intermittent
Mild persistent
Moderate persistent
Severe persistent
Status asthmaticus
- Bronchospasm not reversed by usual measures
- Life-threatening
does not respond to regular treatment
Clinical manifestations of asthma
- Asymptomatic between attacks
- Chest constriction, expiratory wheezing, dyspnea, nonproductive coughing, prolonged expiration, tachycardia, tachypnea
what is tuberculosis
World’s foremost cause of death from a single infectious agent
- Tuberculosis (TB) usually involves the lungs, but any organ can be infected including brain, kidneys, and bones
DRUG-RESISTANT FORMS
M. tuberculosis hominis (human tuberculosis)
- Airborne infection spread by minute droplet nuclei harbored in the respiratory secretions of persons with active tuberculosis
- Living under crowded and confined conditions increases the risk for spread of the disease
Bovine tuberculosis
- Acquired by drinking milk from infected cows; initially affects the gastrointestinal tract
- Has been virtually eradicated in North America and other developed countries
The major factors that contributed to the resurgence of TB were
- high rates of TB among patients with HIV infection
- the emergence of multidrug-resistant (MDR) strains of M. tuberculosis
Positive Tuberculin Skin Test
Results from a cell-mediated immune response
- Implies that a person has been infected with M. tuberculosis and has mounted a cell-mediated immune response
- Does not mean the person has active tuberculosis
what is emphysema
- Enlargement of air spaces and destruction of lung tissue
Types: centriacinar and panacinar
what is Chronic Obstructive Bronchitis
Obstruction of small airways
Characteristics of Pulmonary Emphysema
Smoking history Age of onset: 40 to 50 years - Often dramatic barrel chest - Weight loss Decreased breath sounds Normal blood gases until late in disease process Cor pulmonale only in advanced cases Slowly debilitating disease
characteristics of pathophysiology of chronic bronchitis
- enlarged submucosal gland
- inflammation of epithelium
- mucous plug
- mucus accumaltion
hyperinflation of alveoli
what is Bronchiectasis
Permanent dilation of the BRONCHI and BRONCHIOLES
- Weight loss and anemia are common
manifestations of Bronchiectasis
Atelectasis Obstruction of the smaller airways Diffuse bronchitis Recurrent bronchopulmonary infection Coughing; production of copious amounts of foul-smelling, purulent sputum; and hemoptysis Weight loss and anemia are common.