Hematologic Disorders Notes

HEMATOLOGIC DISORDERS HEMATOLOGY • The hematologic or hematopoietic system includes the blood, blood vessels, and blood forming organs ( bone marrow, spleen, liver, lymph nodes, and thymus gland). • Major function of blood is to carry necessary materials ( oxygen, nutrients ) to cells and to remove CO2 system and metabolic waste products. • It also plays a role in hormone transport, inflammatory and immune responses, temperature regulation, fluid-electrolyte balance, and acid-base balance. THREE BROAD FUNCTIONS OF BLOOD : Transportation • Respiratory – transport of gases by the RBC • Nutritive – transport of digested nutrients from the GIT to the different cells of the body • Excretory – transport of metabolic wastes to the kidneys and excreted as urine Regulation • Hormones and other molecules that help regulate metabolism are also carried in the blood • Thermoregulation Protection • Blood clotting • Leukocytes COMPONENTS OF THE BLOOD : 1. Plasma 2. Formed Elements • Erythrocytes or RBC • Leukocytes or WBC • Thrombocytes or Platelets BLOOD • Average volume is 5 – 6 liters or approximately 6 quarts • pH is 7.35 – 7.45 • Arterial blood is usually bright red in color compared to venous blood which has a darker color, due primarily to the large concentration of oxyhemoglobin found in arterial blood BLOOD a. ) Plasma - fluid portion of the blood Contains : proteins / albumin fibrinogen clotting factors electrolytes waste products nutrients b. ) Cellular Components 1. Leukocytes (WBC) 2. Erythrocyte (RBC) 3. Thrombocyte (Platelets) Hematopoiesis – occurs in the bone marrow ( pelvis, ribs, vertebrae and sternum. Extramedullary Hematopoiesis - the liver and the spleen produces blood cells PLASMA • • • • 1. 2. 3.

The liquid part of the blood Approximately 90% water Also contains nutrients, ions (salts, primarily Na), respiratory gases, hormones, plasma proteins, antibodies and various wastes and products of cellular metabolism PLASMA PROTEINS – the most abundant solutes in the plasma Three Types Albumin Globulin Fibrinogen

FORMED ELEMENTS OF THE BLOOD Erythrocytes • Also called Red Blood Cells or RBC’s • Function primarily to ferry Oxygen in the blood to all cells in the body • Also transports Carbon dioxide out of the body • Lifespan of 120 days only

• • •

Hemoglobin in the RBC binds with the Oxygen as it is transported in the blood • Female : 12 – 16 g/100ml • Male : 13 – 18 g/100ml Normal RBC count: about 4 – 6 million/mm³ Hematocrit (HCT) – percentage of RBC per given volume of blood and is an important indicator of the Oxygen-carrying capacity of the blood • Female : 37 – 48% • Male : 45 – 52%

Leukocytes • Also called White Blood Cells or WBC’s • Average value : 4,000 – 11,000 / mm³ • Protects the body against any damage • Are able to slip in and out of the blood vessels by ameboid fashion – in a process called diapedesis • When mobilized, the body speeds up production which usually indicates the presence of infection in the body • Leukocytosis – total WBC count above 11,000 / mm³ • Leukopenia – an abnormally low WBC count • Types: o Granulocytes • Neutrophils Eosinophils Basophils o Agranulocytes • Lymphocytes Monocytes Cells of the Immune System • Lymphocytes • Lymphocytes are created in the bone marrow and migrate to the Thymus where they mature • After becoming immunocompetent, the B & T cells transfer to the lymph nodes & spleen • Types 1. B lymphocytes or B cells – produces antibodies to incapacitate the antigen 2. T lymphocytes or T Cells – attacks antigens directly • Macrophages • Literally means “Big Eaters” • Arise from monocytes formed in the bone marrow • Major role : to engulf foreign particles • Cellular (Cell-Mediated) Immune Response T – Cells • Responds directly to antigens • Will destroy target cells thru secretions of Lymphokines and Perforin ( “Kiss of Death”) which is inserted to the cell membrane, shortly after that, the target cell ruptures • They have a: • License to KILL • License to HELP • License to Suppress • Three types : • Killer T Cells – binds to the surface of invading cells, disrupt the cell membrane & destroy it by altering it’s environment • Helper T cells – helps to stimulate the B Cells to mature into Plasma Cells which synthetize & secrete immunoglobulins (Antibodies) • Suppressor T Cells – Reduces the Humoral response • Humoral (Antibody-Mediated) Immune Response •

B – Cells

• Matures into Plasma Cells responsible for Antibody production 5 Classes of Immunoglobulins (MADGE) : 1. Immunoglobulin M (IgM) 1st immunoglobulin produced in an immune responsepresent in plasma, too big to cross membrane barriers 2. Immunoglobulin A (IgA) Sound in body secretions like saliva, tears, mucus, bile, milk & colostrum 3. Immunoglobulin D (IgD) Present only in the plasma & is always attached to the B Cell 4. Immunoglobilin G (IgG) 80% of circulating antibodies Can cross the placenta and provide passive immunity Present in all body fluids 5. Immunoglobulin E (IgE)

Responsible for Allergic & hypersensitivity reactions Stimulates Mast cells & Basophils to release Histamine which mediates inflammation & the allergic response Thrombocytes • Also called Platelets • Average value : 250,000 – 450,000 / mm³ • Lives for about 5 – 10 days • Important in blood clotting Cell Type RBC

Normal Value / mm³ 4 – 6 million

WBC

4,000 – 11,000

Neutrophils

3,000 – 7,000 40 – 70% of WBC

Eosinophils

Function Transport Oxygen

Active Phagocytes, increases during acute infections

100 – 400 1 – 4% of WBC

Kills parasitic worms, increases in allergy attacks, helps detoxify foreign substances

Basophils

20 – 50 0 – 1% of WBC

Contains histamine Releases anticoagulant heparin

Lymphocytes

1,500 – 3,000 20 – 45% of WBC

Part of Immune System B & T Lymphocytes

Monocytes

100 – 700 4 – 8% of WBC

Phagocytes that become macrophages – “clean-up team” & increases in chronic infections

Platelets

250,000 – 450,000

Needed for Blood Clotting Initiates Clotting Cascade

Hematopoiesis (Blood Cell Formation) • • • • •

•

Occurs in the Red Bone Marrow, chiefly in flat bones like Skull, ribs, pelvis, sternum and proximal epiphyses of the humerus and femur Erythropoiesis – RBC production, is a very active process RBC are continuously being destroyed by the liver & spleen RBC’s have a lifespan of 120 days As RBC’s are destroyed, iron is recycled to the bone marrow for use in the formation of new RBC’s Erythropoietin – secreted by the kidneys & released when blood levels of Oxygen begins to decline for any reason; which stimulates the Red Bone Marrow to produce more RBC’s

ERYTHROCYTES > destruction - mature cells removed chiefly by

spleen & liver

* BILIRUBIN = byproduct of Hgb released

when RBC’s destroyed

* IRON = freed from Hgb during bilirubin = transported to bone marrow via TRANSFERIN & reclaimed for new Hgb production

formation

Glucuronic acid

ERYTHROPOIESIS - RBC production Requirements : a. Erythropoietin b. Iron c. Folic Acid d. Vitamin B6, Vitamin B12 e. Vitamin C Liver and Spleen - Graveyard of the RBC Hemostasis (Blood Clotting) •

Three Major Phases 1. Platelet Plug Formation • Platelets adhere and stick to vessel lining that are damaged forming a Platelet Plug or White Thrombus • Platelets release chemicals to attract more platelets to the injured site 2. Vascular Spasms • Platelets release Serotonin causing spasms of the blood vessel, constricting it & decreasing blood flow 3. Coagulation or Blood Clotting • Thromboplastin is released by damaged cells • plasma Clotting Factors form an activator that triggers the Clotting Cascade • a Blood Clot is formed • Serum is squeezed out within the hour pulling the ruptured edges together

Plasma Clotting Factors I II III IV V VII VIII IX X XI XII XIII

Fibrinogen Prothrombin Tissue Thromboplastin Calcium Proacelerin Proconvertin Antihemophilic Factor Christmas Factor Stuart – Prower Factor Plasma Thromboplastin Antecedent Hageman Factor Fibrin Stabilizing Factor

Anemia • Conditions in which the number of RBC’s or amount of hemoglobin is lower than normal • leads to hypoxia and ischemia • Classifications of Anemia According to Etiology Bleeding Hypoproliferative Hemolytic Resulting from RBC Loss

low RBC production

increased RBC destruction

accidents / trauma

Iron deficiency

enlarged spleen

surgery

Vit. B12 deficiency

sickle cell

childbirth

Folic acid deficiency

thalassemia

ruptured blood vessel

Vit. C deficiency

G6PD

menorrhagia

chronic disease

drug-induced

epistaxis

low erythropoietin

hemorrhoids

cancer

GI bleeding / ulcers cancer

Iron Deficiency Anemia • most common type of anemia • Iron stores are depleted, resulting in a decreased supply of iron for the manufacture of hemoglobin in RBC’s Commonly results from blood loss, increased metabolic demands, syndromes of gastrointestinal malabsorption, and dietary inadequacy • cause : inadequate absorption or excessive loss of iron • Bleeding – principal cause in adults • Vegetarian diets • Vitamin C – increases iron absorption Pathophysiology Stage 2 Stage 1 Iron loss exceeds intake, depleting iron reserves

Fewer RBC are produced

Stage 3 Anemia develops RBC – normal but few in number Hgb & Hct – normal levels Stage 4 Bone marrow compensates : Speeds up production – Microlytic / Small red blood cells

Stage 5 Symptoms of anemia worsens

Most definitive way to diagnose anemia : Bone marrow aspiration

Assessment Findings Mild cases - asymptomatic fatigue dyspnea Palpitations & dizziness Pallor Brittle hair and nails Pica Glossitis Cheilosis Irritability Koilonychia Laboratory findings : RBC’s are small / microcytic and pale • decreased hemoglobin decreased hematocrit • decreased serum iron decreased ferritin Nursing Interventions 1. Identify the cause 2. Monitor S/Sx of bleeding – stool, urine and GI contents 3. Provide rest 4. Give iron preparations ( 6 – 12 months ) Ferrous Sulfate Ferrous Gluconate a. always give after meals or snacks b. dilute liquid preps and give thru straw c. give with orange juice (Vitamin C enhances absorption) d. warn clients the stool will become black and can cause constipation 5. For clients with poor absorption or continuous blood loss IM or IV of Iron Dextran a. Use 1 needle to withdraw and another for injection b. Use z-track method c. don’t massage but encourage ambulation d. usually, deep IM at buttocks 6. Give dietary teaching – liver, meats, nuts, egg yolk, shellfish, legumes, etc. 7. Increase intake of roughage and fluids to prevent constipation.

Ferrous Fumarate

Pernicious Anemia • Vitamin B12 Deficiency Anemia • caused by inadequate Vit. B12 intake or deficiency in intrinsic factor • Vit. B12 combines with intrinsic factor so it can be absorbed in the ileum into the bloodstream` • the result is abnormally large erythrocytes and hypochlorhydria ( a deficiency of hydrochloric acid in gastric secretions). • Lack of intrinsic factor is caused by gastric mucosal atrophy (possibly due to heredity, prolonged iron deficiency, or an autoimmune disorder), can also result in client who have had a total gastrectomy • Usually occurs in men and women over age 50, with an increase in blue eyed persons. PATHOPHYSIOLOGY Intrinsic factor + Vit. B12 for absorption

Result : decreased or no Vit. B12

Lead to : decreased RBC production Assessment : Anemia - symptoms are : Fatigue, weakness dyspnea Palpitations & dizziness Pallor confusion

Decreased intellectual fxn Sore tongue : Beefy red tongue Paresthesias Weight loss Lab Results Decrease RBC Decreased free Hydrochloric acid Large RBC / Megaloblast Positive Schilling Test – definitive test for Pernicious anemia - used to detect lack of intrinsic factor Positive schilling test • Measures absorption of radioactive vitamin B12 both before and after parenteral administration of intrinsic factor. • Definitive test for pernicious anemia. • Used to detect lack of intrinsic factor. • Fasting client is given radioactive vitamin B12 by mouth and nonradioactive vitamin B12 IM to saturate tissue binding sites and to permit some excretion of radioactive vitamin B12 in the urine if it is absorbed. • 24-48 hour urine collection is obtained; client is encouraged to drink fluids. • If indicated, a second stage Schilling test will be performed 1 week after first stage. • Fasting client is given radioactive vitamin B12 combined with human intrinsic factor and the test will be repeated. Nursing Interventions / Treatment 1. Drug Therapy a. Vit. B12 injections monthly for life b. Iron Preparations c. Folic Acid 2. Transfusion therapy 3. Bed rest 4. Mouth care 5. Dietary teaching 6. Teach about importance of lifelong Vitamin B12 therapy • Provide a nutritious diet high in iron, protein, and vitamins (fish, meat, milk/milk products and eggs). • Avoid highly seasoned, coarse or very hot foods if client has a mouth sores. • Provide mouth care before and after meals using a soft toothbrush and non irritating rinses. HEMOLYTIC ANEMIAS • increase rate of RBC destruction • short life span of RBC. TYPES: • G6PD • Sickle cell anemia • Thalassemia • DIC • Transfussion incompatibilities Sickle Cell Anemia • Most common inherited disease among black Americans. • Also found in Arabian, Mediterranean and Caribbean descent • Hgb S ( abnormal hemoglobin ), which has reduced oxygen carrying capacity, replaces all or part of the hemoglobin in the RBC’s. • Life span is 6-20 days instead of 120, causing hemolytic anemia. • Death often occurs in early adulthood due to occlusion or infection. • During decreased O2 tension, lowered pH, dehydration and severe infections, RBC’s change from round to sickle or crescent shape • Sickled cells don’t slide thru vessels as normal RBC’s do, causing clumping, thrombosis, arterial obstruction, increased blood viscosity, hemolysis and eventual tissue ischemia and necrosis Sickle Cell Crisis : • Cause : infection, dehydration, fever, cold exposure, hypoxia, strenuous exercise, extreme fatigue or extreme changes in altitude VASO-OCCLUSIVE CRISIS: A. most common and most painful type of crisis • caused by stasis of blood with clumping of the cells in the microcirculation leading to ischemia & infarction. B. signs include fever, pain, and tissue engorgement C. Treatment – hydration, electrolyte replacement, bed rest, broad spectrum antibiotics, transfusions and oxygen therapy.

SPLENIC SEQUESTRATION:

A. Life - threatening crisis caused by the pooling of blood in the spleen. (from congestion of sickled cells) B. signs include profound anemia, hypovolemia, and shock C. treatment : blood transfusions and splenectomy APLASTIC CRISIS: A. Occurs infrequently and is caused by: • diminished production of RBC • increased destruction of RBC’s • triggered by a viral infection or the depletion of folic acid. B. signs include profound anemia, pallor,

and PANCYTOPENIA.

C. Treatment – Transfusion of packed RBC’s • •

Frequent infection esp. with H. influenzae Infants may have Dactylitis (hand – foot syndrome) symmetrical painful soft tissue swelling in the hands and feet in the absence of trauma

ASSESSMENT • Signs and symptoms of anemia – pallor, weakness • Hepatospleenomegaly • Dactylitis (Symmetric swelling of the hands and feet) – called hand-foot syndrome • Other problems : – CVA – MI – Growth retardation – initial manifestation – Decreased fertility – Priapism – Recurrent severe infections MEDICAL MANAGEMENT A. Drug therapy > analgesic/narcotics to control pain • Avoid meperidine (Demerol) due increased risk of seizures in children > antibiotics to control infection. B. Blood transfusions C. Hydration:oral and IV D. Bed rest E. Surgery: splenectomy INTERVENTIONS • Administer O2 & Blood Transfusion as Rx • Maintain adequate hydration • Avoid tight clothing that could impair circulation. • Keep wounds clean and dry. • Provide bed rest to decrease energy expenditure and oxygen use. • Encourage patient to eat foods high in calories, CHON, with folic acid supplementation. • Analgesics: • Acetaminophen • Morphine • avoid aspirin as it enhances acidosis,which promotes sickling • Avoid anticoagulants( sludging is not due to clotting ). • Antibiotics. • Avoid activities that require so much energy. • Keep arms and legs from extreme cold. • Decrease emotional stress. • Provide good skin care THALASSEMIA MAJOR (Cooley’s anemia) • B - thalassemia refers to an inherited hemolytic anemia, characterized by reduction or absence of the B-globulin chain in Hgb synthesis • Fragile RBC & short life span • Autosomal recessive pattern of inheritance • Insufficient B-globulin chain synthesis allows large amounts of unstable chains to accumulate

• • •

Precipitates of alpha chains that form cause RBC’s to be rigid & easily destroyed, leading to severe hemolytic anemia = chronic hypoxia Skeletal deformities: pathologic fractures Hemosiderosis – excess iron supply, which leads to iron deposits in the organ tissues leading to decreased function

CLINICAL MANIFESTATIONS • onset is usually insidious • Sx are primarily related to progressive anemia, expansion of marrow cavities of the bone & developmemnt of hemosiderosis • Early Sx often include progressive pallor, poor feeding & lethargy • Further signs: hemorrhage, bone pain, exercise intolerance, jaundice, & protuberant abdomen DIAGNOSTIC EVALUATION • Decrease hemoglobin • RBC= increase in number • Hgb elctrophoresis – elevated levels of HgF ( doesn’t hold O2 well ) – limited amount of HgA Management • Frequent and regular transfusion of packed RBC’s to maintain Hgb levels above 10 g/dL • Iron chelation therapy with deferoxamine (Desferal) – reduces toxic effects of excess iron & increases iron excretion thru urine & feces • Splenectomy • Supportive management of symptoms • Bone marrow transplant • Prognosis and Survival rate is poor because of no known cure • Often fatal in late adolescence or early adulthood Complications • Splenomegaly • Growth retardation in the second decade • Endocrine abnormalities : – delayed development of secondary sex characteristics – most boys fail to undergo puberty, girls – menstruation problems – DM – due to iron deposits in the pancreas – Hypermetabolic rates • Skeletal complications – Frontal & parietal bossing (Enlargement) – Maxillary hypertrophy – leading to occlusion – Premature closure of epiphyses of long bones – Osteoporosis & pathologic fractures • Cardiac problems: pericarditis & CHF – usual cause of death • Gallbladder disease – Gallstones that often require surgery • Skin – bronze pigmentation caused by iron deposits in the dermis • Leg ulcers ERYTHROBLASTOSIS FETALIS Rh Incompatibility • Destruction of RBCs that result from Ag-Ab rxn • Characterized by hemolytic anemia or hyperbilirubinemia • Possibly caused by Rh incompatibility between the mother & the fetus (Ag & Ab reaction) • Sensitization of Rh (-) woman by transfusion of Rh (+) blood • Sensitization of Rh (-) woman by presence of Rh (+) RBCs from her fetus conceived with Rh (+) man • Approximately 65% of infants conceived by this combination of parents will be Rh (+) • Mother is sensitized by passage of Rh (+) RBCs thru placenta, either during pregnancy (break/leak in membrane) or at the time of separation of the placenta after delivery. RH INCOMPATIBILTY • FIRST PREGNANCY - mother may become sensitized, baby rarely affected INDIRECT COOMB’S TEST - Tests for anti-Rh(+) Ab in mother’s circulation - performed during pregnancy at first visit & again about 28 week’s gestation. RESULTS: - If (-) at 28 weeks, a small dose of (MicroRhogam) is given prophylactically to prevent sensitization in the - Rhogam may also be given after 2nd trimester amniocentesis - If (+), levels are titrated to determine potential effects on the fetus DIRECT COOMBS’ TEST - Tests done on the cord blood at delivery to determine presence of (+) Ab on fetal RBCs

3rd trimester.

RESULTS - If both indirect & direct Coombs’ test is NEGATIVE & infant is Rh(+): - NEGATIVE: No formation of Anti-Rh (+) Ab - Rhogam (Rho[D] human immune globulin is given to the Rh(-) mother to prevent development of anti-Rh(+) Ab as the result of sensitization from present or just terminated pregnancy. • In each pregnancy, an Rh(-) mother who carries an Rh (+) fetus receives Rhogam if both the mother and infant is (-) to both direct & indirect Coombs’ test. If mother is has been sensitized: anti-Rh(+) Ab are present - Rhogam is not indicated •

• Rhogam must be injected into unsensitized mother’s system within 72 hours of delivery of Rh(+) infant CLINICAL FINDINGS • Anemia • Jaundice that develops rapidly after birth and before 24 hours or that occurs within 24 - 36 hours • Enlarged placenta • Edema • Ascites NURSING INTERVENTIONS • Determine blood type and Rh early in pregnancy. • Determine results of direct Coomb’s test early in pregnancy & again at 28 week’s. • Determine results of direct Coomb’s test on cord blood. - type & Rh, Hgb, Hct • Implement phototherapy or exchange transfusion. • Administer Rh0 (D) immune globulin to the mother during the first 72 hrs. after delivery if the Rh(-) mother delivers an Rh (+) fetus but remains unsensitized • Assist with exchange transfusion as prescribed. • The baby undergoes transfusion of blood to stop the destruction of the baby’s RBC - the transfused blood is replaced with the baby’s own blood gradually • Reassure the mother that the newborn will suffer no untoward effects from the condition MYELOPROLIFERATIVE DISORDER POLYCYTHEMIA VERA Chronic myeloproliferative d.o. involves bone marrow elements increase RBC mass & hgb • Underlying cause is unknown • Hyperplasia of all bone marrow elements > increase RBC mass > increase blood volume viscosity > decrease marrow iron reserve > Splenomegaly ASSESSMENT • Reddish purple hue of skin & mucosa, pruritus • Splenomegaly, hepatomegaly • Epigastric discomfort, abdominal discomfort • Painful fingers & toes from paresthesias • Altered mentation • Weakness, fatigue, night sweats, bleeding tendency • Hyperuricemia – from increased RBD formation and destruction DX TESTS • CBC • BONE MARROW ASPIRATION & Biopsy MANAGEMENT • HYPERVISCOSITY = phlebotomy @ intervals determined by CBC results to decrease RBC mass =generally 250-500ml removal @ a time • HYPERPLASIA = myelosuppressive therapy, = generally using hydroxyurea or IV radioactive phosphorus (32P), biologic response modifier, ie alpha interferon • HYPERURICEMIA= allupurinol (Zyloprim) • PRURITUS = antihistamines (cimitidine), low dose acetyl salicylic acid; certain anti-depressants (paroxetin), phototherapy, cholestyramine INTERVENTION

• Encourage/assist ambulation • Assess for early S/Sx of thromboembolic complications : swelling of limbs, increased warmth, pain • Monitor CBC & assist with phlebotomy as ordered Patient Education • Educate about risk of thrombosis; encourage patient to maintain normal activity pattern & avoid long periods of rest • Avoid hot showers • Report @ regular intervals for follow up blood DISORDERS OF PLATELETS AND CLOTTING MECHANISM HEMOPHILIA • Hereditary coagulation defect, usually transmitted to affected male by female carrier through sex – linked recessive gene, resulting in prolonged clotting time. • Most common type is Hemophilia A or Classic Hemophilia - factor VIII deficiency (called Antihemophilic Factor / AHF) • Hemophilia B or Christmas Disease – factor IX deficiency (called the Christmas Factor) • Male inherits hemophilia from their mothers, and females inherit the carrier status from their fathers. – Found predominantly, but not exclusive, in male offsprings • Bleeding occurs due to impaired ability to form fibrin clot

ASSESSMENT • Abnormal bleeding in response to trauma or surgery. (muscles/joints) • Joint bleeding causing pain, tenderness, swelling, and limited range of motion. • Tendency to bruise easily. • Epistaxis • Hemarthrosis (bleeding in joints causing pain, swelling and limited movement) IMPLEMENTATION • Administer factor VIII concentrate. • Monitor for bleeding and maintain bleeding precautions. • Monitor for joint pain; IMMOBILIZE the affected extremity if joint pains occur. • Monitor urine for hematuria. • Instruct the parents regarding activities for the child, emphasizing the avoidance of contact sports. • Instruct the parents on how to control bleeding (direct/indirect pressure) • DDVAP (Desmopressin) – promotes the release of Factor VIII in hemophilia A • Use soft toothbrush and point out need for regular dental checkups • Refer to National Hemophilia Association • Emphasize avoidance of Aspirin • Provide diet information as excess weight places further stress on joints R - Rest I - Immobilize C - Cold Compress E - Elevate

DISSIMINATED INTRAVASCULAR COAGULATION • DIC is a disorder of diffuse activation of the clotting cascade that results in depletion of clotting factors in the blood. • occurs when the blood clotting mechanisms are activated all over the body instead of being localized to an area of injury. • grave coagulopathy resulting from overstimulation of clotting & anticlotting processess in response to disease & injury generalized intravascular clotting which in turn overstimulates fibrinolytic mechanisms hypercoagulability

hypocoagulability hemorrhage •

Small blood clots form throughout the body, and eventually the blood clotting factors are used up and not available to form clots at sites of tissue injury.

Clot - dissolving mechanisms are also increased stimulated by many factors including infection in the blood & severe tissue injury – burns and head injury, reactions to blood transfusions, carcinomas and obstetrical complications such as retained placenta after delivery. ASSESSMENT • purpura on lower extremities & abdomen • hemorrhagic bullae, acral cyanosis, focal gangrene in skin Dx Tests: • marked decrease of blood platelets • low levels of fibrinogen & other clotting factors • prolonged prothrombin & partial thromboplastin times & abnormal erythrocyte morphologic characteristics •

Nursing Interventions / Treatment 1. To determine the underlying cause of DIC and provide treatment for it. 2. Replacement therapy of the coagulation factors is achieved by transfusion of fresh frozen plasma. Cryoprecipitates may also be used if fibrinogen is significantly decreased. Platelet transfusions if platelets are diminished 3. Heparin, a medication used to prevent thrombosis, is sometimes used in combination with replacement therapy. ( still controversial ) 4. Prevent further injury a. avoid IM injections b. apply pressure to bleeding sites c. turn patient frequently and gently d. provide mouth care – soft bristled toothbrush 5. Teach patient the importance of avoiding aspirin. IDIOPATHIC THROMBOCYTOPENIA PURPURA • Increased destruction of platelets with resultant platelet count of less that 100,000/mm3 characterized by petechiae and ecchymoses of the skin. • Exact cause unknown; may be autoimmune. • Spleen is the site for destruction of platelets • often triggered by URTI or Childhood communicable disease – Measles & chickenpox ASSESSMENT: • Petechiae • Ecchymosis • Blood in any body secretions, bleeding form mucous membranes, nosebleeds. • Decreased platelet count • Anemia • easy bruising • blood in stool or urine • CBC reveals platelet count below 20,000/mm3 • Bone marrow aspiration done to rule out leukemia MEDICAL MANAGEMENT: • Drug therapy: • Prednisone – decreases anti-platelet antibodies (monitor for infection) • IVIG (Intravenous Immune Globulin) – helps to effectively increase platelet count • Anti-D Antibody – one dose treatment • Given to pt’s 1 year but less than 19 years old • Normal WBC and hemoglobin • no active bleeding present • no concurrent infection • Diphenhydramine and hydrocortisine are made ready for possible allergic reactions to the medication • Platelet transfusion • Splenectomy INTERVENTION • Prevent, control and minimize bleeding. • Prevent bruising • Provide support to client and be sensitive to change in body image. • Protect from infection. • Administer analgesics (acetaminophen) as ordered; avoid aspirin. • administer meds orally, rectally, or I.V. rather than I.M. BLOOD AND BLOOD PRODUCTS Whole Blood • Contents – RBC’s – WBC’s – Platelets – Plasma – Clotting factors • Indications – Acute loss of whole blood Packed Cells • Contents – RBC’s – 20% Plasma • Indications – Replace O2 carrying capacity with less volume – Severe anemia, slow blood loss, CHF

Granulocytes • Contents – WBC’s – 20% Plasma • Indications – Life-threatening decreases in WBC count Plasma • Contents – Clotting factors – Fibrinogen – Prothrombin – Albumin – Globulins • Indications – Clotting factor deficiency – Volume expansion Plasma Protein Fraction • Contents – 5% Albumin/Globin in saline • Indications – Expand volume in burns – Hemorrhage – Hypoproteinemia Albumin • Contents – 5% or 25% albumin • Indications – Replace volume in shock – Burns – Hypoproteinemia Cryoprecipitate • Contents – Factors VIII and XIII, Fibrinogen • Indications – Hemophilia A – Fibrinogen deficiency – Factor XIII deficiency Prothrombin • Contents – Factors II, VII, IX, and X • Indications – Hemophilia B – Liver disease Blood Transfusion • ABO Antigens – A Antigen – B Antigens – A and B Antigens – No Antigens TRANSFUSION COMPLICATIONS Allergic Reactions • Signs/Symptoms – Itching – Uticaria – Chills – Fever – Facial edema – Wheezing – Anaphylactic shock • Management – Oxygen – IV fluids

Type A Type B Type AB Type O

– –

Epinephrine Antihistamines

Hemolytic Reaction • Signs/Symptoms – Chills, fever – Low back pain – Headache – Chest pain – Dyspnea – Cyanosis – Restlessness, anxiety – Hypotension – Red urine • Management – Stop transfusion – Treat shock – Volume replacement – Mannitol Volume Overload • Signs/Symptoms – Cough – Chest pain – Dyspnea – Distended neck veins – Rales – Frothy sputum • Management – Slow infusion – Diuretics – Vasodilators Transfusion Complications • Coagulation Disturbances – Platelet/Clotting factor deterioration • Citrate Intoxication – Hypocalcemia – Metabolic Alkalosis • Hyperkalemia – RBC’s Lyse/Release K+ • Hypothermia – Inadequate warming during transfusion • Viral Hepatitis – Risk rises with each unit Blood Transfusion • IV catheter 18g or larger • No fluid other than saline – D5W lyses RBC’s – LR contains calcium/triggers clotting • Two persons confirm ABO/Rh • Blood filter in administration set • Infusion pumps – Excessive pressure can cause hemolysis • Rewarming above 380C can cause hemolysis • Never add medications directly Plasma Clotting Factors I II III IV V VII VIII IX X XI XII

Fibrinogen Prothrombin Tissue Thromboplastin Calcium Proacelerin Proconvertin Antihemophilic Factor Christmas Factor Stuart – Prower Factor Plasma Thromboplastin Antecedent Hageman Factor

XIII

Fibrin Stabilizing Factor