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Diseases of the blood
BLOOD DISORDERS/DISEASES
ANEMIATHE MOST COMMON
DISORDER OF THE BLOOD
LACK OF RBC’S CARRYING OXYGEN• Main classes of etiology include:
Excessive blood loss – hemorrhage
Excessive blood cell destruction – hemolysis
Deficient red blood cell production
ANEMIADiagnosing the type of anemia is based on:
Nutrient deficiencies
Presence of immature RBC’s
Characteristic color and volume of RBC’s
Lab values
GENERAL SIGNS AND SYMPTOMS (of all anemias)
• Pallor or lack of color-especially mucuous membranes
• Fatigue• Dizziness• Headaches• Decreased exercise tolerance• Rapid heartbeat• Shortness of breath
GENERAL PROGNOSIS(if anemia is untreated)
• Heart failure • Cardiovascular collapse• Shock
IRON DEFICIENCY ANEMIA(most common cause of anemia)
ETIOLOGY:• Increased iron requirements,• Impaired iron absorption• Hemorrhage
WHAT DO I NEED TO KNOW ABOUT IRON DEFICIENT ANEMIA?
• Iron is needed to synthesize hemoglobin---which is needed to transport oxygen
• Iron requirements are greatest from birth to age two
WHAT DO I NEED TO KNOW ABOUT IRON DEFICIENT ANEMIA?
• Pregnancy requires supplements to ensure fetus gets enough iron
• Sudden growth spurts and onset of menstruation are risks for iron deficient anemia
WHAT ELSE DO I NEED TO KNOW ABOUT IRON DEFICIENT ANEMIA?
Absorption takes place in the GI tract so diseases that affect the mucosa of the GI tract can put your patient at a risk for anemia because they limit the availability of Iron needed to synthesize hemoglobin
EXAMPLES OF CAUSES
• Chronic diseases that cause inflammation
(inflammatory changes can suppress red blood cell synthesis in bone marrow and shorten life of RBC’s)• Removal of the stomach• Chronic disease treatment • Bowel disorders
DIAGNOSISCBC- low H&H
Reports of signs and symptoms including:• Extreme fatigue• Pale skin• Weakness• Shortness of breath• Headache• Dizziness or lightheadedness• Cold hands and feet• Irritability• Fast heartbeat• Unusual cravings for non-nutritive substances, such as ice, dirt or starch• Poor appetite, especially in infants and children with iron deficiency
anemia• An uncomfortable tingling or crawling feeling in your legs (restless legs
syndrome)
TREATMENT OF IRON DEFICIENCY ANEMIA
• Diet rich in iron• Vitamin supplements with iron• IV Supplements if necessary
• NOTE: iron supplements are constipating and oral doses should not be taken on an empty stomach
PERNICIOUS ANEMIA
Etiology:• Vitamin B12 absorption or intake is deficient
or utilization is inadequate • Deficiency in intrinsic factor (a protein in the
stomach needed so B12 can be absorbed from the small intestine)
• Removal of stomach or the bowel• Abnormal bacterial growth in small intestine• Strict vegetarianism
HOW DOES LACK OF B12 OR INTRINSIC FACTOR CAUSE ANEMIA?
• The deficiency causes the membranes of immature RBC’s to rupture easily leaving fewer RBC’s to carry oxygen
SYMPTOMS OF PERNICIOUS ANEMIA
• Nausea, vomiting, burning of the tongue• Neurological disturbances such as numbness,
weakness, poor reflexes• GENERAL SYMPTOMS OF ANEMIA
– Pallor or lack of color-especially mucuous membranes– Fatigue– Dizziness– Headaches– Decreased exercise tolerance– Rapid heartbeat– Shortness of breath
DIAGNOSIS OF PERNICIOUS ANEMIA
• Health history to rule out inherited lack of intrinsic factor
• Physical exam shows jaundice, enlarged liver, irregular heart rate
• CBC abnormal• Bone Marrow aspiration/biopsy(cells that
make blood cells will be larger than normal)
TREATMENT OF PERNICIOUS ANEMIA
• Vitamin B12 supplementation (injectable if it cannot be absorbed)
• NOTE: Pernicious Anemia puts you at a higher risk for stomach cancer
HEMOLYTIC ANEMIA
Etiology: Reduction in RBC’s by conditions that accelerate destruction of RBC’s such as:• Inherited abnormalities such as hemoglobin
defects, enzyme defects and membrane defects that impair intrinsic factor physical properties
• Infections/immune disorders (HIV, Lupus)• Medications (chemotherapy)
SIGNS AND SYMPTOMS OF HEMOLYTIC ANEMIA
• Mild may have no signs or symptoms • General s/s of anemia see slide four• Increased serum bilirubin levels from the
hemoglobin destruction in destroyed RBC’s
• Jaundice, dark urine and feces due to accumulation of bilirubin system
DIAGNOSIS OF HEMOLYTIC ANEMIA
• Enlarged spleen• CBC Includes H&H• Liver function blood tests• Bone Marrow Aspiration and or biopsy
TREATMENTS FOR HEMOLYTIC ANEMIA
• Blood transfusions• Medication• Plasmaphoresis• Surgery• Stem Cell transplants
Blood Transfusions
Blood transfusion reaction
• Caused by antibodies forming and person rejecting blood being transfused.
• Stop transfusion immediately.
MEDICATIONS
• Corticosteroids (Prednisone) - limit immune system from making antibodies(proteins) against RBC’s
• Rituximab, Cyclosporine – drugs that suppress your immune system
PLASMAPHORESIS
• A procedure that removes antibodies from the blood using a needle inserted into a vein. The plasma is separated from the rest of the blood and then donor plasma is put back into the blood.
SURGERY
• Spleenectomy – removal of spleen. An enlarged or diseased spleen may remove more RBC’s than normal. Removing it can help reduce high rates of RBC destruction
Note : a healthy spleen helps fight infection and filters out old or damaged blood cells.
APLASTIC ANEMIA
• bone marrow doesn’t make enough new blood cells because stem cells are damaged (Also caused bone marrow failure)
• Can be acquired or inherited
ACQUIRED APLASTIC ANEMIA ETIOLOGY
• Exposure to toxins—pesticides
• Radiation and chemotherapy• Antibiotics like chloramphenicol
• Hepatitis, HIV,CMV, Eptstein-Barr virus• Lupus, rheumatoid arthritis
SIGNS AND SYMPTOMS OF APLASTIC ANEMIA
• General signs and symptoms:– Pallor or lack of color-especially mucuous membranes– Fatigue– Dizziness– Headaches– Decreased exercise tolerance– Rapid heartbeat– Shortness of breath
• Decreased RBC’s, WBC’s and platelets• Nausea• Skin rashes
DIAGNOSIS OF APLASTIC ANEMIA
• History and physical
• CBC
• Reticulocyte count (# of young blood cells)
• Bone marrow aspiration/biopsy
TREATMENT OF APLASTIC ANEMIA
• Removal of known cause if possible
• Blood transfusions
• Blood and marrow stem cell transplants
• Medications
Blood and marrow stem cell transplants
MEDICATIONS
• Stimulate bone marrow-Erythropoieten and colony stimulating factors
• Suppress immune system
Antihymocyte globulin (ATG), cyclosporine and methylprednisone – all three given together
SICKLE CELL ANEMIA
• Blood cells are crescent shaped instead of round, because of abnormal hemoglobin.
• It is thready and cells are stiff and sticky.
• Sickled cells block blood flow, causing
pain, infection and organ damage.
WHAT CAUSES THE ANEMIA?
• After 10-20 days sickle cells die. Bone marrow can’t make new RBC’s fast enough to replace the dying ones
FACTS ABOUT SICKLE CELL ANEMIA
• It is inherited-one sickle gene from each parent
• People who have the disease are born with it
• If sickle cell gene from one parent and normal gene from other parent you have sickle cell trait.
• Most common in African Americans
SIGNS AND SYMPTOMS OF SICKLE CELL DISEASE
• General anemia s/s from slide four• Acute Pain throughout body is called
sickle cell crisis• Chronic pain in bones• Multiple organ failure
• Infections and dehydration can contribute to a sickle cell crisis
DIAGNOSIS
• Blood testing at newborn screening.• Amniotic fluid sampling before birth.
TREATMENT
• If in sickle cell crisis, treatment involves pain management with NSAIDS and or opiates, fluids and oxygen if levels are low.
• Hydroxyurea – medication that causes body to make fetal hemoglobin which helps blood cells from sickling and improves anemia
• Blood transfusions
COMPLICATIONS
• Stroke• Eye damage• Multiple organ failure• Leg ulcers• Gall stones• Priapism (painful erection in males)
EMERGING TRENDS
• Research on blood and marrow stem cell transplants and gene therapy is ongoing.
• New medications:
Decitabine – prompts body to make Fetal hemoglobin
Adenosine A2a receptor agonists – may reduce pain related complications
Disseminated Intravascular Coagulation (DIC)
This disease is an activation of blood clotting mechanisms that occurs in response to various other diseases. Small blood clots form throughout the body, followed by a disruption in the coagulation process and then abnormal bleeding from several places within the body. This may be followed by multiple organ failure and death if not treated immediately.
ETIOLOGY/CAUSES:
Cancer
Obstetric: Abruptio placentae, pre-eclampsia, embolism
Massive tissue injury from trauma, burns, surgery
Infections: Sepsis
Signs and symptoms
• Bleeding into intravascular spaces due to destruction of platelets and clotting factors.
• Widespread hemmorage • Extensive bruising• Renal failure• Shock
Diagnosis
• Blood test s• Prolonged PT, & PTT• Severe thrombocytopenia• Fragmented RBC’s• Physical exam
Treatment
• Reverse underlying cause• Platelet transfusions
Hemophilia
• An inheirited clotting disorder due to a deficiency of clotting factors
• X linked recessive disorder primarily affects males
• The body is not able to control blood clotting or coagulation when a blood vessel is broken
• Hemophilia A is deficient in Factor VIII• Hemophilia B is deficient in Factor IX
Signs and symptoms
• Internal and external bleeding episodes• Most common internal bleed is into the
joint. If bleeding into joints, can cause joint fibrosis
• Intracranial hemorrhage often cause of death
Diagnosis
• Genetic testing• PT/PTT• Platelet count• H&H
Treatment
• Replacement of clotting factor• Preventive exercises to strengthen the
joints. Increasing flexibility, tone and strenght.
• Anticoagulants are contraindicated (Heparin)
• Blood thinners are contraindicated (aspirin, ibuprofen, naproxen)
Leukemia
• Cancer of the blood or bone marrow• Proliferation of immature forms of WBC’s• Classified based on whether cells affected
are B Cells, T Cells (lymphoid tissue) or Myeloid cells (bone marrow)
• Occurs 10x more often in children than adults
Etiology
• Etiology is unknown, however research indicates some cases of leukemia are caused by treatment of other cancers, environmental factors and possibly pre-exposure to viruses
• Acute leukemia: rapid increase in immature blood cells
• Chronic leukemia: excessive build up of relatively mature, but still abnormal WBC’s
Classifications of Leukemia• Acute lymphoblastic leukemia (ALL) is the most common
type of leukemia in young children. This disease also affects adults, especially those age 65 and older. Standard treatments involve chemotherapy and radiotherapy.
• Chronic lymphocytic leukemia (CLL) most often affects adults over the age of 55. It sometimes occurs in younger adults, but it almost never affects children. Two-thirds of affected people are men.
• Acute myelogenous leukemia (AML) occurs more commonly in adults than in children, and more commonly in men than women. AML is treated with chemotherapy.
• Chronic myelogenous leukemia (CML) occurs mainly in adults. A very small number of children also develop this disease.
Signs and symptoms
• Fatigue• Weight loss• Repeated infections due to dysfunctional
WBC’s• Low grade fevers• Nosebleeds, easy bruising and
Hemorrhages due to lack of platelets• Anemia from RBC deficiency
Diagnosis
• CBC• Bone marrow biopsy
Treatment
• Chemotherapy• Bone marrow transplantation
What is Chemotherapy
• The most common chemotherapy agents act by killing cells that divide rapidly, one of the main properties of most cancer cells. This means that chemotherapy also harms cells that divide rapidly under normal circumstances: cells in the bone marrow, digestive tract and hair follicles. This results in the most common side-effects of chemotherapy: Immunosuppression, mucositis, alopecia
What is a Bone Marrow Transplant?
• A bone marrow transplant is a procedure to replace damaged or destroyed bone marrow with healthy bone marrow stem cells.
• Bone marrow is the soft, fatty tissue inside your bones. Stem cells are immature cells in the bone marrow that give rise to all of your blood cells.
• There are three kinds of bone marrow transplants:• Autologous bone marrow transplant: "Auto" means "self." Stem
cells are removed from you before you receive high-dose chemotherapy or radiation treatment. After these treatments are done, your stems cells are put back in your body. This is called a "rescue" transplant.
• Allogeneic bone marrow transplant: "Allo" means "other." Stem cells are removed from another person, called a donor. Most times, the donor must have the same genetic makeup as the patient, so that their blood is a "match" to yours. Special blood tests are done to determine if a donor is a good match for you. A brother or sister is most likely to be a good match. However, sometimes parents, children, and other relatives may be good matches. Donors who are not related to the patient may be found through national bone marrow registries.
• Umbilical cord blood transplant: Stem cells are removed from a newborn baby's umbilical cord immediately after being born. The stem cells are stored until they are needed for a transplant. Umbilical cord blood cells are so immature, there is less of a concern that they will not match.