Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

Embed Size (px)

Citation preview

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    1/33

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    2/33

    Thalassemia

    Thalassemiaalso called Mediterranean anemiais an inherited blood disorder

    characterized by less hemoglobin and fewer red blood cells in your body than normal.

    Defects in the genes that make hemoglobin cause thalassemia. Hemoglobin is the

    substance in red blood cells that allows the cells to carry oxygen from your lungs tothe other parts of your body. Because of low hemoglobin and a low amount of red

    blood cells, thalassemia results in anemia.

    If you have a mild form of thalassemia, you may not require any treatment. But, ifyou

    have a more severe form, you may need blood transfusions on a regular basis.Although in some

    cases severe thalassemia can be life-threatening, milder forms ofthalassemia usually can be

    effectively treated.

    Although thalassemia causes anemia, don't confuse thalassemia with iron deficiency

    anemia. People with thalassemia often have more iron in their bodies than they need.For this reason, if you have thalassemia, don't take iron supplements unless your

    doctor recommends it.

    Symptoms

    Signs and symptoms of thalassemia include:

    Fatigue

    Weakness

    Shortness of breath

    Yellow discoloration of the skin (jaundice)

    Bone deformities in the face

    Slow growth

    Protruding abdomen

    The signs and symptoms you experience depend on your type and severity of

    thalassemia. Some babies show signs and symptoms of thalassemia at birth, whileothers may not develop signs or symptoms until they're about 6 to 12 months old.

    Some people who have only one hemoglobin gene affected don't experience any

    thalassemia symptoms.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    3/33

    Causes;

    Blood consists of liquid, called plasma, and three types of cells that float within the

    plasma:

    White blood cells. These blood cells fight infection.

    Platelets. These blood cells help your blood clot after a cut.

    Red blood cells (erythrocytes). These blood cells carry oxygen from your

    lungs, through you

    r bloodstream, to your brain and your body's other organs

    and tissues. Your body needs a supply of oxygenated blood to function.

    Oxygenated blood helps give your body its energy and your skin a healthy

    glow.

    Red blood cells contain hemoglobina red, iron-rich protein that gives blood its red

    color. Hemoglobin enables red blood cells to carry oxygen from your lungs to allparts of your body and to carry carbon dioxide from other parts of your body to your

    lungs so that it can be exhaled. Most blood cells, including red blood cells, are

    produced regularly in your bone marrowa red, spongy material found within the

    cavities of many of your large bones.

    Thalassemia disrupts the normal production of hemoglobin and leads to a low level of

    hemoglobin and a high rate of red blood cell destruction, causing anemia. When

    you're anemic, your blood doesn't have enough red blood cells to carry oxygen to your

    tissuesleaving you fatigued.

    Thalassemia is caused by defects in the genes that make hemoglobin. The only way to

    get thalassemia is to inherit one or more defective hemoglobin genes from your

    parents.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    4/33

    There are two types of thalassemia: alpha and beta, named for the two protein chains

    that make up normal hemoglobin. The type of thalassemia you have depends on the

    type of defective gene you inherit.

    Alpha-thalassemia

    Four genes are involved in making the alpha hemoglobin chain. You get two from

    each of your parents. If one or more of the alpha hemoglobin genes are defective, you

    develop alpha-thalassemia.

    The more defective genes you have, the more severe your alpha-thalassemia:

    One gene. If only one of your alpha hemoglobin genes is defective, you'll

    have no signs or symptoms of thalassemia. But, you're a carrier of the disease

    and can pass it on to your children.

    Two genes. If you have two defective alpha hemoglobin genes, thalassemia

    signs and symptoms are mild. This condition is called alpha-thalassemia

    minor.

    Three genes. If three of your alpha hemoglobin genes are defective, your

    signs and symptoms will be moderate to severe. This condition is also called

    hemoglobin H disease.

    Four genes. When all four alpha hemoglobin genes are defective, the

    condition is called alpha-thalassemia major or hydrops fetalis. It usually

    causes a fetus to die before delivery or shortly after birth.

    Beta-thalassemia

    Two genes are involved in making the beta hemoglobin chain. You get one from each

    of your parents. If one or both of the beta hemoglobin genes are defective, you

    develop beta-thalassemia.

    One gene. If one of your beta hemoglobin genes is defective, you have mild

    signs and symptoms. This condition is called beta-thalassemia minor.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    5/33

    Two genes. If both of your beta hemoglobin genes are defective, your signs

    and symptoms will be moderate to severe. This condition is called beta-

    thalassemia major or Cooley's anemia. Babies born with two defective beta

    hemoglobin genes usually are healthy at birth, but develop signs and

    symptoms within the first year of life.

    Risk factors

    Factors that increase your risk of thalassemia include:

    Family history. Thalassemia is an inherited disorder, passed from parents to

    children through defective hemoglobin genes.

    Ancestry. Thalassemia occurs most often in people of Italian, Greek, Middle

    Eastern, southern Asian and African ancestry. Alpha-thalassemia affects

    mainly people of Southeast Asian, Chinese and Filipino descent.

    When to seek medical advice

    Make an appointment with your child's health care provider for an evaluation if he or

    she has any of the following signs or symptoms of thalassemia:

    Fatigue

    Weakness

    Shortness of breath

    Yellow discoloration of the skin (jaundice)

    Bone deformities in the face

    Slow growth

    Protruding abdomen

    Dark urine

    Tests and diagnosis

    Most children who have moderate to severe cases of thalassemia show signs and

    symptoms within their first two years of life. If your doctor suspects your child has

    thalassemia, he or she may confirm a diagnosis using blood tests. If your child has

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    6/33

    thalassemia, blood tests may reveal a low level of red blood cells. The red blood cells

    may be smaller than normal, pale (a sign of low hemoglobin), varied in size and

    shape, and have uneven hemoglobin distributiongiving the cells a bull's-eye

    appearance under the microscope.

    Blood tests may also be used to measure the amount of iron in your child's blood andto evaluatehis or her hemoglobin. In some cases, a blood test may be used for DNAanalysis to diagnose

    thalassemia or to determine if a person is carrying defective

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    7/33

    Dengue hemorrhagic fever

    Dengue, the most common arboviral illness transmitted worldwide, is caused by infection

    with 1 of the 4 serotypes of dengue virus, family Flaviviridae, genus Flavivirus (single-stranded

    no segmented RNA viruses). Dengue is transmitted by mosquitoes of the genusAedes, which are

    widely distributed in subtropical and tropical areas of the world, and is classified as a major

    global health threat by the World Health Organization (WHO)

    Dengue is a mosquito-borne infection that in recent decades

    has become a major international public health concern. Dengue is found in tropical and sub-

    tropical regions around the world, predominantly in urban and semi-urban areas. Dengue

    hemorrhagic fever (DHF), a potentially lethal complication, was first recognized in the 1950s

    during dengue epidemics in the Philippines and Thailand. Today DHF affects most Asian

    countries and has become a leading cause of hospitalization and death among children in the

    region. There are four distinct, but closely related, viruses that cause dengue. Recovery from

    infection by one provides lifelong immunity against that virus but confers only partial and

    transient protection against subsequent infection by the other three viruses. There is good

    evidence that sequential infection increases the risk of developing DHF.

    Global burden of dengue

    The incidence of dengue has grown dramatically around the world in recent decades.

    Some 2.5 billion peopletwo fifths of the world's populationare now at risk from dengue.

    WHO currently estimates there may be 50 million dengue infections worldwide every year. In2007 alone, there were more than 890 000 reported cases of dengue in the Americas, of which 26

    000 cases were DHF. The disease is now endemic in more than 100 countries in Africa, the

    Americas, the Eastern Mediterranean, South-east Asia and the Western Pacific. South-east Asia

    and the. Western Pacific is the most seriously affected. Before 1970 only nine countries had

    experienced DHF epidemics, a number that had increased more than four-fold by 1995.Not only

    is the number of cases increasing as the disease is spreading to new areas,

    butexplosive outbreaks are occurring. In 2007, Venezuela reported over 80 000 cases, including

    more than 6 000 cases of DHF. Some other statistics:

    During epidemics of dengue, infection rates among those who have not been previouslyexposed to the virus are often 40% to 50%, but can reach 80% to 90%.An estimated 500 000

    people with DHF require hospitalization each year, a very large proportion of whom are children.

    About 2.5% of those affected die. Without proper treatment, DHF fatality rates can exceed 20%.

    Wider access to medical care from health providers with knowledge about DHF - physicians and

    nurses who recognize its symptoms and know how to treat its effects - can reduce death rates to

    less than 1%.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    8/33

    The spread of dengue is attributed to expanding geographic distribution of the

    four dengue viruses and their mosquito vectors, the most important of which is the

    predominantly urban species. A rapid rise in urban mosquito populations is bringing ever greater

    numbers of people into contact with this vector, especially in areas that are favorable for

    mosquito breeding, e.g. where household water storage is common and where solid waste

    disposal services are inadequate. Dengue viruses are transmitted to humans through the bites of

    infective female mosquitoes. Mosquitoes generally acquire the virus while feeding on the blood

    of an infected person. After virus incubation for eight to 10 days, an infected mosquito is

    capable, during probing and blood feeding, of transmitting the virus for the rest of its life.

    Infected female mosquitoes may also transmit the virus to their offspring by trans ovarial (via the

    eggs) transmission, but the role of this in sustaining transmission of the virus to humans has not

    yet been defined .Infected humans are the main carriers and multipliers of the virus, serving as a

    source of the virus for uninfected mosquitoes. The virus circulates in the blood of infected

    humans for two to seven days, at approximately the same time that they have a fever mosquitoes

    may acquire the virus when they feed on an individual during this period. Some studies haveshown that monkeys in some parts of the world play a similar role in transmission.

    Dengue fever is a severe, flu-like illness that affects infants, young children and adults,

    but seldom causes death. The clinical features of dengue fever vary according to the age of the

    patient. Infants and young children may have a fever with rash. Older children and adults

    may have either a mild fever or the classical incapacitating disease with abrupt onset and high

    fever, severe headache, pain behind the eyes, muscle and joint pains, and rash.

    Dengue hemorrhagic fever (DHF) is a potentially deadly complication that is characterized

    by high fever, often with enlargement of the liver, and in severe cases circulatory failure. The

    illness often begins with a sudden rise in temperature accompanied by facial flush and other flu-like symptoms. The fever usually continues for two to seven days and can be as high as 41C,

    possibly with convulsions and other complications in moderate DHF cases, all signs and

    symptoms abate after the fever subsides. In severe cases, the patient's condition may suddenly

    deteriorate after a few days of fever; the temperature drops, followed by signs

    of circulatory failure, and the patient may rapidly go into a critical state of shock and die within

    12 to 24 hours, or quickly recover following appropriate medical treatment (see below).

    There is no specific treatment for dengue fever.

    For DHF, medical care by physicians and nurses experienced with the effects and progression of

    the complicating hemorrhagic fever can frequently save livesdecreasing mortality ratesfrom more than 20% to less than 1%. With four closely related viruses that can cause the disease,

    the vaccine must immunize against all four types to be effective.

    There is limited understanding of how the disease typically behaves and how the virus interacts

    with the immune system. There is a lack of laboratory animal models available to test immune

    responses to potential vaccines. Despite these challenges, two vaccine candidates

    have advanced to evaluation in human subjects in countries with endemic disease, and several

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    9/33

    potential vaccines are in earlier stages of development. WHO provides technical advice and

    guidance to countries and private partners to support vaccine research and evaluation.

    At present, the only method of controlling or preventing dengue virus transmission is to

    combat the vector mosquitos .In Asia and the Americas, breeds primarily in man-

    made containers like earthenware jars, metal drums and concrete cisterns used for domesticwater storage, as well as discarded plastic food containers, used automobile tires and other items

    that collect rainwater. In Africa the mosquito also breeds extensively in natural habitats such as

    tree holes, and leaves that gather to form "cups" and catch water

    .In recent years,, a secondary dengue vector in Asia, has becomeestablished in the United

    States, several Latin American and Caribbean countries, parts of Europe and Africa. The rapid

    geographic spread of this species is largely attributed to the international trade in used tires, a

    breeding habitat. Vector control is implemented using environmental management and chemical

    methods. Proper solid waste disposal and improved water storage practices, including covering

    containers to prevent access by egg-laying female mosquitoes are among methods that areencouraged through community-based programs. The application of appropriate insecticides to

    larval habitats, particularly those that are useful in households, e.g. water storage vessels,

    prevents mosquito breeding for several weeks but must be re-applied periodically. Small,

    mosquito-eating fish and copepods (tiny crustaceans) have also been used with some success.

    During outbreaks, emergency vector control measures can also include broad application of

    insecticides as space sprays using portable or truck-mounted machines or even aircraft. However,

    the mosquito-killing effect is transient, variable in its effectiveness because the aerosol droplets

    may not penetrate indoors to microhabitats where adult mosquitoes are sequestered, and the

    procedure is costly and operationally difficult. Regular

    monitoringof the vectors' susceptibility to widely used insecticides is necessary to ensure theappr

    opriate choice of chemicals. Active monitoring and surveillance of the natural mosquito

    population should accompany control efforts to determine program effectiveness.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    10/33

    PHYSICAL ASSESSMENT

    Date assessed: September 6 2011

    General assessment: conscious and coherent

    Initial vital signs: T=36.2C, RR=23, BP=90/60, PR=70

    Area Assessed Technique Normal Findings Actual Findings Evaluation

    Skin

    Color Inspection Light brown,tanned skin (vary

    according to race)

    Light brown skin Normal

    Soles and palms Inspection Lighter colored

    palms, soles

    Lighter colored

    palms, soles

    Normal

    Moisture Inspection/

    Palpation

    Skin normally dry Skin normally dry Normal

    Temperature Palpation Normally warm Normally warm Normal

    Texture Palpation Smooth and soft Smooth and soft NormalTurgor Palpation Skin snaps back

    immediately

    Skin snaps back

    immediately

    Normal

    Skin

    appendagesa. Nails Inspection Transparent,

    smooth and convex

    Transparent,

    smooth and convex

    Normal

    Nail beds Inspection Pinkish Pale Due to

    decreased

    blood flow

    Nail base Inspection Firm Firm Normal

    Capillary refill Inspection/

    Palpation

    White color of nailbed under pressureshould return to

    pink within 2-3

    seconds

    Returns within 2-3seconds

    Normal

    b. Hair

    Distribution Inspection Evenly distributed Evenly distributed Normal

    Color Inspection Black Black Normal

    Texture Inspection/

    Palpation

    Smooth Smooth Normal

    Eyes

    Eyes Inspection Parallel to eachother

    Parallel to eachother

    Normal

    Visual Acuity Inspection

    (penlight)

    PERRLA- Pupils

    equally round reactto light and

    accommodation

    PERRLA- Pupils

    equally round reactto light and

    accommodation

    Normal

    Eyebrows Inspection Symmetrical in

    size, extension, hair

    Symmetrical in

    size, extension, hair

    Normal

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    11/33

    texture and

    movement

    texture and

    movement

    Eyelashes Inspection Distributed evenly

    and curved outward

    Distributed evenly

    and curved outward

    Normal

    Eyelids Inspection Same color as the

    skin

    Blinks involuntarily

    and bilaterally up to

    20 times per minute

    Do not cover the

    pupil and the

    sclera, lids

    normally closesymmetrically

    Same color as the

    skin

    Blinks involuntarily

    and bilaterally up to

    18 times per minute

    Do not cover the

    pupil and the sclera,

    lids normally close

    symmetrically

    Normal

    Normal

    Normal

    Conjunctiva Inspection Transparent withlight pink color

    Transparent withlight pink color

    Normal

    Sclera Inspection Color is white Color is white Normal

    Cornea Inspection Transparent, shiny Transparent, shiny Normal

    Pupils Inspection Black, constrictbriskly

    Black, constrictbriskly

    Normal

    Iris Inspection Clearly visible Clearly visible Normal

    Ears

    Ear canalopening

    Inspection Free of lesions,discharge of

    inflammation

    Canal walls pink

    Free of lesions,discharge of

    inflammation

    Canal walls pink

    Normal

    Normal

    Hearing Acuity Inspection Client normallyhears words when

    whispered

    Client normallyhears words when

    whispered

    Normal

    NoseShape, size and

    skin color

    Inspection Smooth, symmetric

    with same color asthe face

    Smooth, symmetric

    with same color asthe face

    Normal

    Nares Inspection Oval, symmetric

    and withoutdischarge

    Oval, symmetric

    and withoutdischarge

    Normal

    Mouth and

    PharynxLips Inspection Pink, moist

    symmetric

    Light pink, dry,

    symmetric

    Lack of fluid

    intake

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    12/33

    Buccal mucosa Inspection Glistening pink soft

    moist

    Glistening pink soft

    moist

    Normal

    Gums Inspection Slightly pink color,

    moist and tightly fit

    against each tooth

    Slightly pink color,

    moist and tightly fit

    against each tooth

    Normal

    Tongue Inspection Moist, slightlyrough on dorsalsurface medium or

    dull red

    Moist, slightlyrough on dorsalsurface medium or

    dull red

    Normal

    Teeth Inspection Firmly set, shiny Firmly set, shiny

    With tooth decay

    Normal

    Hard and soft

    palate

    Inspection Hard palate- dome-

    shaped

    Soft Palate- lightpink

    Hard palate- dome-

    shaped

    Soft Palate- lightpink

    Normal

    Neck

    Symmetry ofneck muscles,

    alignment of

    trachea

    InspectionNeck is slightlyhyper extended,

    without masses or

    asymmetry

    Neck is slightlyhyper extended,

    without masses or

    asymmetry

    Normal

    Neck ROM Inspection Neck moves freely,without discomfort

    Neck moves freely,without discomfort

    Normal

    Thyroid gland Palpation Rises freely withswallowing

    Rises freely withswallowing

    Normal

    Thorax andLungs

    Auscultation Clear breath sounds Clear breath sounds Normal

    Abdomen

    Bowel sounds

    Inspection

    Auscultation

    Skin same color

    with the rest of thebody

    Clicks or gurgling

    sounds occur

    irregularly andrange from 5-35 per

    minute

    Skin same color

    with the rest of thebody

    Clicks or gurgling

    sounds occur

    irregularly andrange from 20 per

    minute

    Normal

    Normal

    Extremities

    Symmetry

    Skin color

    Hair distribution

    Inspection

    Inspection

    Inspection

    Symmetrical

    Same with the color

    of other parts of thebody

    Evenly distributed

    Symmetrical

    Same with the color

    of other parts of thebody

    Evenly distributed

    Normal

    Normal

    Normal

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    13/33

    Skin

    Temperature

    Presence of

    lesionROM

    Palpation

    Inspection

    Inspection

    Warm to touch

    No lesions

    Moves freelywithout discomfort

    Warm to touch

    No lesions

    Able to move butwith assistance

    Normal

    Normal

    Due to bodyweakness

    Neurology

    system

    Level ofconsciousness

    Inspection Fully conscious,respond to

    questions quickly,

    perceptive of

    events

    Fully conscious,respond to

    questions quickly

    perceptive of events

    Normal

    Behavior andappearance

    Inspection Makes eye contactwith examiner,

    hyperactive

    expresses feelingswith response to the

    situation

    Makes eye contactwith examiner,

    hyperactive

    expresses feelingswith response to the

    situation

    Normal

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    14/33

    ANATOMY AND PHYSIOLOGY OF THE BLOOD

    BLOOD

    Blood is considered the essence of life because the uncontrolled loss of it can result to

    death. Blood is a type of connective tissue, consisting of cells and cell fragments surrounded by aliquid matrix which circulates through the heart and blood vessels. The cells and cell fragments

    are formed elements and the liquid is plasma. Blood makes about 8% of total weight of the body.

    Functions of Blood:

    >transports gases, nutrients, waste products, and hormones

    >involve in regulation of homeostasis and the maintenance of PH, body temperature, fluidbalance, and electrolyte levels

    >protects against diseases and blood loss

    PLASMA

    Plasma is a pale yellow fluid that accounts for over half of the total blood volume. It

    consists of 92% water and 8% suspended or dissolved substances such as proteins, ions,nutrients, gases, waste products, and regulatory substances.

    Plasma volume remains relatively constant. Normally, water intake through the GITclosely matches water loss through the kidneys, lungs, GIT and skin. The suspended and

    dissolved substances come from the liver, kidneys, intestines, endocrine glands, and immune

    tissues as spleen.

    FORMED ELEMENTS

    Cell Type Description Function

    Erythrocytes (RBC) Biconcave disk, no nucleus, 7-8 micrometers in diameter

    Transport oxygen and carbondioxide

    Leukocytes (WBC):

    Neutrophil

    Basophil

    Spherical cell, nucleus with

    two or more lobes connectedby thin filaments, cytoplasmic

    granules stain a light pink or

    reddish purple, 12-15

    micrometers in diameter

    Spherical cell, nucleus, with

    two indistinct lobes,cytoplasmic granules stain

    blue-purple, 10-12

    micrometers in diameter

    Phagocytizes microorganism

    Releases histamine, which

    promotes inflammation, andheparin which prevents clot

    formation

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    15/33

    Eosinophil

    Lymphocyte

    Monocyte

    Spherical cell, nucleus often

    bilobed, cytoplasmic granules

    satin orange-red or bright red,

    10-12 micrometers in diameter

    Spherical cell with roundnucleus, cytoplasm forms athin ring around the nucleus,

    6-8 micrometers in diameter

    Spherical or irregular cell,nucleus round or kidney or

    horse-shoe shaped, contain

    more cytoplasm thanlymphocyte, 10-15micrometers in diameter

    Releases chemical that reduce

    inflammation, attacks certain

    worm parasites

    Produces antibodies and otherchemicals responsible fordestroying microorganisms,

    responsible for allergic

    reactions, graft rejection,tumor control, and regulation

    of the immune system

    Phagocytic cell in the bloodleaves the circulatory system

    and becomes a macrophage

    which phagocytises bacteria,dead cells, cell fragments, anddebris within tissues

    Platelet Cell fragments surrounded by

    a cell membrane and

    containing granules, 2-5

    micrometers in diameter

    Forms platelet plugs, release

    chemicals necessary for blood

    clotting

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    16/33

    PREVENTING BLOOD LOSS

    When a blood vessel is damaged, blood can leak into other tissues and interfere with the

    normal tissue function or blood can be lost from the body. Small amounts of blood from the body

    can be tolerated but new blood must be produced to replace the loss blood. If large amounts of

    blood are lost, death can occur.

    BLOOD CLOTTING

    Platelet plugs alone are not sufficient to close large tears or cults in blood vessels. When

    a blood vessel is severely damaged, blood clotting or coagulation results in the formation of a

    clot. A clot is a network of threadlike protein fibers called fibrin, which traps blood cells,platelets and fluids.

    The formation of a blood clot depends on a number of proteins found within plasma

    called clotting factors. Normally the clotting factors are inactive and do not cause clotting.

    Following injury however, the clotting factors are activated to produce a clot. This is a complexprocess involving chemical reactions, but it can be summarized in 3 main stages; the chemical

    reactions can be stated in two ways: just as with platelets, the contact of inactive clotting factorswith exposed connective tissue can result in their activation. Chemicals released from injured

    tissues can also cause activation of clotting factors. After the initial clotting factors are activated,

    they in turn activate other clotting factors. A series of reactions results in which each clottingfactor activates the next clotting factor in the series until the clotting factor prothrombin activator

    is formed. Prothrombin activator acts on an inactive clotting factor called prothrombin.

    Prothrombin is converted to its active form called thrombin. Thrombin converts the inactive

    clotting factor fibrinogen into its active form, fibrin. The fibrin threads form a network whichtraps blood cells and platelets and forms the clots.

    CONTROL OF CLOT FORMATION

    Without control, clotting would spread from the point of its initiation throughout the

    entire circulatory system. To prevent unwanted clotting, the blood contains several

    anticoagulants which prevent clotting factors from forming clots. Normally there are enoughanticoagulants in the blood to prevent clot formation. At the injury site, however, the stimulation

    for activating clotting factors is very strong. So many clotting factors are activated that the

    anticoagulants no longer can prevent a clot from forming.

    CLOT RETRACTION AND DISSOLUTION

    After a clot has formed, it begins to condense into a denser compact structure by aprocess known as clot retraction. Serum, which is plasma without its clotting factors, is squeezed

    out of the clot during clot retraction. Consolidation of the clot pulls the edges of the damaged

    vessels together, helping the stop of the flow of blood, reducing the probability of infection andenhancing healing. The damaged vessel is repaired by the movement of fibroblasts into damaged

    area and the formation of the new connective tissue. In addition, epithelial cells around the

    wound divide and fill in the torn area.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    17/33

    The clot is dissolved by a process called fibrinolysis. An inactive plasma protein calledplasminogen is converted to its active form, which is called plasmin. Thrombin and other clotting

    factors activated during clot formation, or tissue plasminogen activator released from

    surrounding tissues, stimulate the conversion of plasminogen to plasmin. Over a period of a few

    days the plasmin slowly breaks down the fibrin.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    18/33

    LABORATORY EXAMINATIONS

    Hematology Report

    Date: September 6 2011

    PARAMETER NORMAL

    FINDINGS

    ACTUAL FINDINGS ANALYSIS

    White Blood Cells 5-10 x 10^g/L 3.9 x 10^g/L Decreased due to

    inadequate

    inflammatory

    defenses to suppress

    infection and humoral

    immunity takes place

    Hemoglobin 120-160g/L 152g/L N0RMAL

    Hematocrit 39-54 % 31 % Decreased due to poor

    oxygen supply

    Segmenters 0.60-0.70 0.73 Increased; indicate

    high glucose level in

    the blood

    Lymphocytes 28-40 42.2

    Platelet Count 150-450 x 10^g/L 22x10^g/L Deceased due to

    hemolysis

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    19/33

    Hematology Report

    Date: September 4 2011

    PARAMETER NORMAL

    FINDINGS

    ACTUAL FINDINGS ANALYSIS

    White Blood Cells 5-10 x 10^g/L 2.9 x 10^g/L Decreased due to

    inadequate

    inflammatory

    defenses to suppress

    infection and humoral

    immunity takes place

    Hemoglobin 120-160g/L 152g/L

    Hematocrit 39-54 % 29 % Decreased due to poor

    oxygen supply

    Segmenters 0.60-0.70 0.65 Normal

    Lymphocytes 28-40 28.6 NORMAL

    Platelet Count 150-450 x 10^g/L 45X10^g/L Hemolysis

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    20/33

    Urinalysis Report

    Date: September 4 2011

    PARAMETER NORMAL

    FINDINGS

    ACTUAL FINDINGS ANALYSIS

    Color Yellow Amber Yellow normal

    Transparency Clear clear normal

    Reaction 4.5-8 6.5 normal

    Specific Gravity 1.005-1.030 1.005 normal

    Sugar Negative Negative normal

    Protein Negative Negative normal

    Squamous Epithelial

    Cells

    Few Occasional normal

    HEMATOLOGY REPORT

    Date: September 5 2011

    PARAMETER NORMALFINDINGS

    ACTUAL FINDINGS ANALYSIS

    White Blood Cells 5-10 x 10^g/L 2.7 x 10^g/L Decreased due toinadequate

    inflammatory

    defenses to suppressinfection and humoral

    immunity takes place

    Hemoglobin 120-160g/L 162g/L Decreased due to poor

    oxygen supply

    Hematocrit 39-54 % 29 % Decreased due to pooroxygen supply

    Segmenters 0.60-0.70 0.68 normal

    Lymphocytes 28-40 44 Increased due to the

    bodys increasedimmune system

    Platelet Count 150-450 x 10^g/L 29x 10^g/L hemolysis

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    21/33

    Date: September 5 2011

    PARAMETER NORMAL

    FINDINGS

    ACTUAL FINDINGS ANALYSIS

    White Blood Cells 5-10 x 10^g/L 4.8 x 10^g/L Decreased due to

    inadequate

    inflammatorydefenses to suppress

    infection and humoral

    immunity takes place

    Hemoglobin M: 13.0-18.0 g/dL 10.3 g/dL Decreased due to poor

    oxygen supply

    Hematocrit 39-54 % 31 % Decreased due to pooroxygen supply

    Segmenters 0.60-0.70 0.57 Decreased; indicatelow glucose level in

    the blood

    Lymphocytes 0.20-0.30 0.43 Increased due to thebodys increased

    immune system

    Platelet Count 150-450 x 10^g/L 95 x 10^g/dL hemolysis

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    22/33

    OBJECTIVES

    General objectives:

    To be knowledgeable about the nature of Dengue Fever Syndrome,

    management and treatment to be able to render effective nursing care to

    the client.

    Specific Objectives:

    To be familiar with the etiology of the disease

    To know the pathophysiology of the disease

    To be aware of the signs and symptoms

    To know its complications

    To be knowledgeable on how to prevent the diseaseTo know the treatment and how to apply it

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    23/33

    PATIENTS PROFILE

    Name: VF

    Age: 15 years old

    Gender: Female

    Address: Mallig Isabela

    Date of Birth: January 3 1996

    Nationality: Filipino

    Religion: Roman Catholic

    Civil Status: Single

    Date of Admission: Sept. 4 2011

    Time of admission: 3:00 pm

    Physician: Dr. Rema Parallag

    Place of Admission: CVMC

    Admitting Diagnosis: Dengue hemorrhagic fever 3

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    24/33

    Discharge Planning

    Patient's Name:

    > VF 15 year-old male patient, who was diagnosed with Dengue

    Hemorrhagic Fever.

    Diet:

    > Encourage nutritious foods like vegetables, meat and fruits.

    Medications:

    > Give acetaminophen in case the temperatures increases.

    > Treatment:

    > Increased oral fluid intake.

    Health Teaching:

    > D- discusses the possible source of infection of the disease.

    > E- educate the family/patient on how to eliminate those vectors.

    > N- Never stocked water in a container without cover.

    > G- Gallon, container and tires must have proper way of disposal.

    > U- Use insecticides at home to kill or reduce mosquito.

    > E- Encourage the family of the patient to clean the surroundings to destroy the

    breeding area.

    >Give aerosol to replace fluid in the body.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    25/33

    PATHOPHYSIOLOGY

    Non- predisposing Factor: Predisposing Factor

    - Age15y/o immunocompromised

    environment

    Bite of aedes aegypti mosquito carrying a virus

    Virus goes into the circulation

    Infects cells & generate cellular response

    Initiates destruction of the platelet

    Potential for haemorrhage

    Stimulates intense inflammatory response

    Release of exogenous pyrogens the body releases anti-

    Inflammatory

    mediators

    WBC (Neutrophils & Macrophages) (Histatin, Kinins)

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    26/33

    Release of endogenous pyrogens vascular response

    Reset of hypothalamic thermostat Redness & Heat

    Fever Headache, Vomiting

    Epistaxis, Abdominal

    pain

    Muscle contract Blood vessels Circulatory CollapseShock

    To produce construct to

    Additional heat prevent loss of body heat DEATH

    SHIVERING CHILLS

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    27/33

    NURSING CARE PLAN

    Assessment NursingDiagnosis

    Planning NursingIntervention

    Rationale Evaluation

    Subjective:Mainit po ang katawan koasverbalized by the patient.

    v/S takenBP 110/70mmHgTemp. 38.4CRR 26bpmPR 90bpm

    - Flushing of skin- Skin warm to touch

    Elevated bodytemperaturerelated toincreasepyrogenscirculating inthe body

    Within 8 hoursof effectivenursinginterventionpatient bodytemperaturewill bedecrease from38.4- 37.5C

    IndependentNursingAction:-Monitoredvital sign

    - Monitoredintake andoutput

    - Performed

    TSB

    -Increasedoral fluidintake

    - Providedsafe & quiteenvironment

    -Informed thepatient aboutpropermanagementof fever

    Dependentnursingintervention:- Administeredmedicationsas order byphysicianssuch asParacetamolor any antipyretic drugs.

    - Serves atbaseline data.-To know thefluid balanceof the body

    - To reducebodytemperature

    through theprocess ofconduction- To preventdehydrationand supportcirculatingvolume.- To provideconduciveplace to rest.Inform thepatient about

    propermanagementof fever- To be ablefor the patientto know thepropermanagement.

    -To elevatethe patientsbodytemperature.

    After 8 hours ofrendering effectivnursing interventthe goal wascompletely met aevidenced bypatients bodytemperaturedecreases from38.4-37.5C.Patients skin not

    warm to touch.Normal complexiof the skin.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    28/33

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    29/33

    Assessment Nursing Diagnosis Planning NursingIntervention

    Rationale Evaluatio

    bjective:asakit ang tiyanas verbalized bypatient.

    uarding ofmachacial grimaceain scale of 8/10

    Acute pain relatedto clinicalmanifestations ofdenguehemorrhagic fever

    Within 8 hours ofeffective nursingintervention patientwill be able to feelless pain on hisabdomen.

    .

    IndependentNursing Action:-Performed acomprehensiveassessment of pain

    - Providednonpharmacologicmanagement likechange of position

    & applying warmcompress

    - Encourageddivers ionalactivities- rest period

    -encouraged pt. todo deep breathingexercises

    - To improvequality, frequency &location of pain.

    -To alleviate pain.

    -To divert hisattentions to thepain- To prevent fatigue

    After 8 hours rendering effenursing intervthe goal waspartially met aevidenced byguarding ofstomach andpatients verbapartial relieve

    pain.

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    30/33

    Assessment NursingDiagnosis

    Planning NursingIntervention

    Rationale Evaluation

    Subjective:Nangangati akoas verbalized bythe patient

    - Redness of theskin- Skin rashes

    Risk for impairedskin integrityrelated toitchiness

    Within 2hours ofnursingintervention,

    patient willdemonstratebehavior inpreventing skinimpairment.

    .

    IndependentNursing Action:-Monitored vitalsigns

    - Provided skinhygiene throughsponge bathing &changing regularly

    - Kept bedlinensdry, use non-irritating materials,& keep bedwrinkled free

    - Palpated skinlesions for size,shape,consistency,texture & hydration

    - Encouragedrepositionschedule for client

    -Providedinformation to theclient about the

    importance ofregularobservation &effective skin care

    - Serves asbaseline data to

    determine anydiscrepancies-To maintain skinintegrity at optimallevel.

    -To avoid lesions,scratching of skin& harboring ofmicroorganism.

    - To assess extentof involvement ofskin impairment.

    -To preventfriction that maycause irritation ofthe skin

    - To promotewellness bygaining

    knowledge ontreatment/ therapy

    After 8 hours ofrendering effectivenursing interventiothe goal was

    completely met asevidenced bypatientsdemonstration ofbehavior inpreventing skinimpairment.-patient verbalizescomfortability,decrease feeling oitchiness andgradualdisappearance of

    rashes.-patients skincolor(pigmentatiobecomes normal(absence ofredness)

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    31/33

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    32/33

    DRUG ACTION INDICATION CONTRAINDICATION ADVERSE

    REACTION

    NURSING

    RESPONSIBILTIES

    PATIENT

    TEACHING

    Dobutamine

    Hydrochloride

    Stimulateshearts beta1receptors to

    increase

    myocardial

    contractility and

    stroke volume.At therapeutic

    dosages, drug

    increases

    cardiac output

    by decreasing

    peripheral

    vascular

    resistance,

    reducing

    ventricular

    filling pressure,

    and facilitating

    AV node

    conduction

    Increase cardiacoutput in short-tern

    treatment of cardiac

    decompensation

    cause by depressed

    contractility, such

    as during refractoryheart failure;

    adjunctive therapy

    in cardiac surgery

    Contraindicatedin patients

    hypersensitive to

    drug or its

    components and

    in those w/

    idiopathichypertrophic

    subaortic stenosis

    CNS:headache

    CV:hypertension,

    increasedheart rate

    Before startingtherapy, give a

    plasma volume

    to correct

    hypovolemia an

    a cardiac

    glycoside Continuously

    monitor ECG,

    blood pressure,

    pulmonary

    artery wedge

    pressure,

    cardiac output

    and urine

    output

    Tell patiento report

    adverse

    reactions

    promptly,

    especially

    laboredbreathing a

    drug-induc

    headache

    Instructpati8ent to

    report

    discomfort

    I.V. inserti

    site

  • 8/4/2019 Pa Tho Physiology of DENGUE Bite of a Virus Carrying Aedes Mosquito

    33/33