management of shock
DESCRIPTION
Management of shock Types of shockTRANSCRIPT
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Assess and identify the type and phase of shock in a presenting patient
Manage the emergency nursing care of the patient with shock
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Assessment Analysis Planning and implementation/intervention Evaluation and ongoing monitoring Documentation of interventions and patient response Age-related considerations (pediatric/geriatric)
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Inadequate tissue perfusion Multiple causes, but the pathophysiology is usually
the same Life threatening Imbalance between the supply of and demand of
oxygen and nutrients
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Monitor vital signs closely Monitor mental status Monitor lab values
◦ ABG with lactate◦ CBC – RBC remain normal, HCT- decreased and HGB-
increased◦ Coagulation panel- PT and PTT are prolonged, INR and d
dimer are also prolonged (watch for DIC)◦ Troponin, TCK, BUN, Creatinine are elevated◦ Glucose initially elevated, then decreases after glycogen is
depleted
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Tachypnea -> bradypnea Decreased urine output Pallor, cool, clammy skin Anxiety, confusion, agitation Absent bowel sounds
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Based on history and physical assessment Elevated lactic and a base deficit 12 lead EKG Chest x-ray Continuous pulse oxymetry
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Fluid resuscitation Administration of blood products Monitor bleeding
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Vital signs Lab values Mental status
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Document any and all patient interventions and patient response
document all vital signs, watching for subtle changes. Mental status Strict inputs and outputs
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Pediatric◦ Increases cardiac output by increasing heart rate◦ Sustains arterial pressure despite significant volume loss◦ Loses 25% of circulating volume before signs of shock
occur Geriatric
◦ Shock progression is rapid◦ Reduced compensatory mechanisms◦ Preexisting disease states contribute to co-morbidities
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1. Compensated ( nonprogressive) shock 2. Uncompensated (progressive) shock 3. Irreversible (refractory) shock
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“Reversible stage during which compensatory mechanisms are effective and homeostasis is maintained”
Clinical presentation begins to reflect the body’s response to the imbalance of oxygen supply and demand
Metabolism changes at the cellular level from aerobic to anaerobic, causing the lactic acid build up which is removed by the liver, but needs oxygen
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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At first, blood pressure will decrease, which happens because of the decrease in cardiac output (CO) and a narrowing of the pulse pressure. The baroreceptors in the carotid and aortic bodies immediately respond by activating the sympathetic nervous system (SNS). The SNS stimulates vasoconstriction and release of epinephrine and norepinephrine (potent vasconstrictors)
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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Blood flow to the vital organs, such as the heart and brain, are maintained, while blood flow to non-vital organs, the kidneys, liver, skin, GI tract and the lungs, is shunted.
Decreased blood flow to the kidneys activates the renin-angiotensin system.
Renin is released, which activates angiotensinogen to produce angiotensin I, which is then converted to antiotesnsin II.
Angiotensin II causes vasoconstriction in both the arteries and venous system
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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At this stage, the body is able to compensate for the changes in tissue perfusion. If the underlying cause is corrected, the patient will recover with little to no residual effects.
If the body is unable to compensate the body will enter the progressive stage of shock
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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Neurologic◦ Alert and oriented to person, place and time◦ Restless, apprehensive, confused◦ Change in level of consciousness
Cardiovascular◦ Release of epinephrine/norepinephrine which
promotes vasoconstriction◦ ↑contractility◦ ↑heart rate◦ Coronary artery dilation◦ Narrow pulse pressure◦ BP remains adequate to perfuse vital organs
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Respiratory◦ ↓blood flow to the lungs◦ hyperventilation
Gastrointestinal◦ ↓blood supply◦ Hypoactive bowel sounds
Renal◦ ↓renal blood flow◦ ↑renin resulting in release of angiotensin
(vasoconstrictor)◦ ↑aldosterone resulting in sodium and water re-
absorption◦ ↑ antidiuretic hormone resulting in water re-
absorption
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Hepatic◦ No changes at this stage
Hematologic◦ No changes at this stage
Temperature◦ Normal to abnormal
Skin◦ Pale and cool◦ Warm and flushed (early septic shock)
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Key laboratory findings◦↑blood glucose◦↑pH◦↓PaO2◦↓PaCO2
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This stage of shock begins when the body’s compensatory mechanisms fail
Aggressive interventions are need to prevent the development of multiple organ dysfunction syndrome (MODS)
Continued decreased cellular perfusion and resulting alerted capillary permeability are the distinguishing features of this stage
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Altered capillary permiability allows leakage of fluid and protein out of the vascular space into the surrounding interstitial space causing a decrease in circulating volume and an increase in systemic interstitial edema.
This fluid leak from the vascular space also affects the solid organs, liver, spleen, GI tract, lungs, and peripheral tissues by further decreasing oxygen perfusion
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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Neurologic◦↓cerebral perfusion pressure◦↓ cerebral blood flow◦Listless or agitated◦↓responsiveness to stimuli
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Cardiovascular◦ ↑capillary permeability → systemic interstitial edema◦ ↓ cardiac output = ↓BP and ↑HR◦ MAP <60mmHG◦ ↓Peripheral perfusion◦ Ischemia of distal extremities◦ Diminished pulses◦ ↓capillary refill ↓Coronary perfusion resulting in◦ Dysrhythmias ◦ Myocardial ischemia◦ Myocardial infarction◦ Myocardial dysfunction → impaired cardiac output
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Respiratory ◦ Acute respiratory distress syndrome (ARDS)
↑capillary permeability Pulmonary vasoconstriction Pulmonary interstitial edema Alveolar edema Diffuse infiltrates ↑ respiratory rate ↓ compliance
◦Moist crackles
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Gastrointestinal◦Vasoconstriction and decreased perfusion lead to
ischemic gut (stomach, small and large intestines, gallbladder and pancreas)
◦Erosive ulcers◦GI bleeding◦Translocation of GI bacteria◦Impaired absorption of nutrients
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Renal◦ Renal tubules become ischemic causing acute tubular
necrosis◦ ↓urine output◦ ↑BUN/creatinine ratio◦ ↑urine sodium◦ ↓Urine osmolarity and specific gravity◦ ↓urine potassium◦ Metabolic acidosis
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Hepatic◦Failure to metabolize drugs and waste products◦Jaundice◦Increase in lactate and ammonia
Hematologic◦DIC◦Thrombin clots in microcirculation◦Consumption of clots in microcirculation
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Temperature◦Hypothermia◦Sepsis: hyper or hypothermia
Skin◦Cold and clammy
Key laboratory findings◦↑ liver enzymes: ALT, AST, GGT◦↑ bleeding times◦thrombocytopenia
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Final stage of shock Decreased perfusion from peripheral vasoconstriction
and decreased cardiac output exacerbate anaerobic metabolism
Lactic acid accumulates and contributes to an increased capillary permeability and dilation of the capillaries
Increased capillary permeability allows for fluid and plasma to leave the vascular space and move to the interstitial space
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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Blood pools in the capillary beds secondary to constricted veins and dilated arteries
Loss of intravascular volume leads to worsening of hypotension and tachycardia resulting in a decrease in coronary blood flow
Decreased coronary blood flow results in decreased cardiac output
Cerebral blood flow cannot be maintained and cerebral ischemia results
Lewis, Heitkemper, Dirksen, O'Brien, Bucher(2007). Medical Surgical Nursing. St. Louis, MO: Mosby Elsevier
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Neurologic◦ Unresponsive◦ Arreflexia ◦ Pupils nonreactive and dilated
Cardiovascular◦ Profound hypotension◦ ↓ cardiac output◦ Bradycardia, irregular rhythm◦ Unable to perfuse vital organs
Respiratory◦ Severe hypoxemia◦ Respiratory failure
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Gastrointestinal◦ Ischemic gut
Renal◦ anuria
Hepatic◦ Metabolic changes from accumulation of waste products
(ammonia, lactate, carbon dioxide) Hematologic
◦ DIC
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Temperature◦hypothermic
Skin◦Mottled, cyanotic
Key laboratory findings◦↓ blood glucose◦↑ ammonia, lactate and potassium◦Metabolic acidosis
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Crystalloids: increase intravascular volume through actual volume administered
Colloids: pull fluid into the vascular space through osmosis
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Isotonic: similar in composition to body fluid. Provides greater intravascular volume d/t more fluid staying in the vascular space
Hypotonic fluid: shift fluid into intracellular spaces. Useful in preventing cellular dehydration. They deplete circulatory volume
Hypertonic: move fluid from cells to extravascular space, may be used to replace electrolytes and promote diuresis
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0.9% Normal saline: Isotonic fluid
0.45% Normal Saline: hypotonic
5% Dextrose: hypotonic
Lactated Ringer: Isotonic
Hypertonic Saline (7.5%): hypertonic, pulls fluid from interstitial and intracelluar spaces into the vascular space
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Dextran → Hetastarch → Fresh frozen plasma Albumin Whole blood Packed red blood cells
Rarely used. Used to expand vascular space.
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Fresh frozen plasma: contains all clotting factors. Used as a blood volume expander
Albumin: preferred as volume expander when risk from producing interstitial edema is great (pulmonary and heart disease)
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Packed Red blood cell’s: Administer with normal saline◦ Increases oxygen affinity for hgb, and decrease oxygen
delivery to the tissues◦ May cause: hypothermia, hyperkalemia, or hypocalcemia
Whole blood: can be administered without normal saline, reduces donor exposure◦ May require greater amt than packed RBC’s to increase
oxygen-carrying capacity of blood◦ Not cost effective. Rarely used
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Pediatric fluid guidelines◦ Up to 10 kg = 4ml/kg/hr◦ 11-20kg = 2ml/kg/hr plus 4ml/kg for first 10kg◦ >20kg = 1ml/kg/hr plus 2ml/kg for each kg 11 through 20
plus 4ml/kg for first 10 kg Volume replacement with crystalloids
◦ Administer 2 ml for each ml lost◦ Pediatric: IV bolus of 20ml/kg of NS or LR◦ IV bolus of 200-300 ml NS in adults
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Monitor for fluid overload: continuous pulse ox, and other vital signs (HR, BP, RR)
Monitor for electrolyte imbalances
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Hypovolemic Shock Cardiogenic Shock Distributive Shock Obstructive Shock
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Loss or redistribution of blood, plasma, or other body fluids, which results in a decreased circulatory volume
Inadequate fluid returning to the heart results in decreased cardiac output
Third spacing occurs due to capillary permeability Example: hemorrhagic shock from trauma,
intraabdominal bleeding, significant vaginal bleeding, GI bleeding or vomiting and diarrhea
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Increased heart rate Decreased pulse pressure Decreased blood pressure
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Cardiovascular◦ ↓ preload, stroke volume ◦ ↓ capillary refill
Pulmonary◦ Tachypnea → bradypnea (late sign)
Renal◦ ↓ urine output
Skin◦ Pallor◦ Cool, clammy
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Neurologic◦ Anxiety◦ Confusion◦ agitation
Gastrointestinal◦ Absent bowel sounds
Diagnostic findings◦ ↓ hematocrit◦ ↓ hemaglobin◦ ↑ lactate◦ ↑ urine specific gravity◦ Changes in electrolytes
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Treatment:◦Correcting the underlying cause◦Warm fluids◦May need supportive therapy with vasopressors
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Nursing Management◦Ensure a patent airway (always #1)◦Make sure client has patent IV access If they need something in an emergency you
want them to have a patent line. ◦Administer oxygen◦Place client in Modified Trendelenburg◦If overt bleeding, apply pressure to the site◦Monitor vital signs every 5 minutes Those vitals can change very quickly.
◦Administer meds as ordered◦Increase the rate of fluid delivered
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Occurs when the heart fails as a pump resulting in significant reduction in ventricular effectiveness
When pump failure occurs, the myocardium cannot forcibly eject blood
Stroke volume decreases d/t decreased contractility, which decreases cardiac output and blood pressure, resulting in decreased tissue perfusion
Decreased oxygenation to heart further complicates patient condition
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Causes of Cardiogenic Shock include:◦Myocardial infarction◦Cardiomyopathy◦Pericardial tamponade◦Dysrhythmias◦Trauma◦Structural abnormalities Valvular abnormality Ventricular septal rupture Tension pneumothorax
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Increased heart rate Decreased pulse pressure Decreased blood pressure
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Cardiovascular◦ Decreased capillary refill◦ May have chest pain
Pulmonary◦ Tachypnea◦ Cyanosis◦ Crackles◦ rhonchi
Skin◦ Pallor◦ Cool, clammy
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Renal◦ ↑ sodium and water retention◦ ↓ renal blood flow◦ ↓ urine output
Neurologic◦ ↓ cerebral perfusion◦ Anxiety◦ Confusion◦ agitation
Gastrointestinal◦ ↓ bowel sounds◦ Nausea/vomiting
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Diagnostic findings◦ ↑ cardiac markers◦ ↑ blood glucose◦ ↑ BUN◦ Dysrhythmias◦ Pulmonary infiltrates on chest x-ray◦ Left ventricular dysfunction on echocardiogram
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Treatment: ◦Correct dysrhythmias◦Drug Therapy:◦ Nitrates◦ Inotropes◦ Diuretics◦ Beta blockers
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Neurogenic Shock Anaphylactic Shock Septic Shock
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Results from spinal cord trauma (usually T5 or above) or spinal anesthesia
Injury results in major vasodilation without compensation due to loss of sympathetic nervous system vasoconstrictor tone
Major vasodilation leads to pooling of blood in the blood vessels, tissue hypoperfusion and ultimately impaired cellular metabolism
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Spinal anesthesia can block transmission of impulses from the SNS resulting in neurogenic shock
Signs/symptoms◦ Hypotension◦ Bradycardia◦ Inability to regulate temperature
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Cardiovascular◦ ↑/↓ Temperature◦ Bradycardia
Pulmonary◦ Dysfunction r/t level of injury
Renal◦ Bladder dysfunction
Skin◦ ↓ skin perfusion◦ Cool or warm◦ dry
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Neurologic◦Flaccid paralysis below the level of the lesion/injury◦Loss of reflex activity
Gastrointestinal◦Bowel dysfunction
Diagnostic findings◦history
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Treatment: ◦High dose steroids: to help decrease inflammation
surrounding spinal cord◦Treat the symptoms
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Nursing management◦Elevate and maintain HOB 30 degrees Most everyone on a neuro floor has the HOB
up 30◦Support cardiovascular and neurologic function◦Prevent blood pooling in lower extremities
Apply TED hose Prevent DVTs
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Acute and life-threatening allergic reaction to a sensitizing substance
Immediate response causing massive vasodilation, release of vasoactive mediators, and an increase in capillary permeablity
Can lead to respiratory distress d/t laryngeal edema or severe bronchospasm, and circulatory failure d/t vasodilation
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Sudden onset of symptoms◦Chest pain◦Dizziness◦Incontinence◦Swelling of lips and tongue◦Wheezing and stridor◦Flushing, pruritis, urticaria◦Angioedema◦Anxious and confused
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Cardiovascular◦Chest pain◦Third spacing of fluid
Pulmonary◦Swelling to tongue and lips◦Shortness of breath◦Edema of larynx and epiglottis◦Wheezing◦Rhinitis◦stridor
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Renal◦Decreased urine output
Skin◦Flushing◦Pruritus◦Urticaria◦angioedema
Neurologic◦Anxiety◦Decreased LOC
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Gastrointestinal◦Cramping◦Abdominal pain◦Nausea◦Vomiting◦Diarrhea
Diagnostic findings◦Sudden onset◦History of allergens◦Exposure to contrast media
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Treatment: ◦Airway management◦Epi 0.3mg SQ or IM to vastus lateralis◦BLS/ACLS
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Nursing Implications◦Assess for allergies◦Communication◦Knowledgeable about s/s (and how to deal with
them should they arise)◦Teach about future exposures (and inform the
families also so they can help)
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Sepsis: systemic inflammatory response to a documented or suspected infection
Septic Shock: presence of sepsis with hypotension despite fluid resuscitation along with the presence of tissue perfusion abnormalities.
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The body responds through both hyper-inflammatory and anti-inflammatory means. Endotoxins released by the invading organisms prompt release of hydrolytic enzymes from weakened cell lysosomes, which causes cellular destruction of bacteria and normal cells
When the body is unable to control the proinflammatory mediators, it produces a systemic inflammatory response
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As a result, there is widespread cellular dysfunction to the endothelium, resulting in vasodilation, increased capillary permeability, and platelet aggregation and adhesions to the endothelium
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Cardiovascular◦ ↑/↓ Temperature◦ Biventricular dilation
↓ ejection fraction
Pulmonary◦ Hyperventilation◦ Respiratory alkalosis then respiratory acidosis◦ Hypoxemia◦ Respiratory failure◦ ARDS◦ Pulmonary hypertension◦ crackles
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Renal◦ Decreased urine output
Skin◦ Warm and flushed then cool and mottled
Neurologic◦ Alteration in mental status◦ Confusion◦ Agitation◦ coma
Gastrointestinal◦ GI bleeding
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Diagnostic findings◦↑/↓ WBC◦↓ Platelets◦↑ Lactate◦↑ Glucose◦↑ Urine specific gravity◦↓ Urine sodium◦*positive blood cultures*
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Treatment◦Fluid administration◦Monitor VS◦Antibiotics: broad spectrum until source is
identified◦Vasopressors
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Nursing Management◦Asepsis and hygiene◦Culture & Sensitivity◦Parenteral therapy and medication
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◦CABs: circulation Airway, breathing, and Focused assessment of tissue perfusion
◦Vital signs◦Peripheral pulses◦Level of consciousness◦Capillary refill◦Skin (e.g., temperature, color, moisture)◦Urine output
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Brief history◦Events leading to shock◦Onset and duration of symptoms
Details of care received before hospitalization Allergies
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Ineffective tissue perfusion: Renal, cerebral, cardiopulmonary, gastrointestinal, hepatic, and peripheral
Fear Potential complication: Organ ischemia/dysfunction
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Goals for patient◦Adequate tissue perfusion◦Restoration of normal or baseline BP◦Return/recovery of organ function◦Avoidance of complications from prolonged states
of hypoperfusion
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Health Promotion ◦Identify patients at risk (e.g., elderly patients, those
with debilitating illnesses or who are immunocompromised, surgical or accidental trauma patients)
◦Planning to prevent shock (e.g., monitoring fluid balance to prevent hypovolemic shock, maintenance of handwashing to prevent spread of infection)
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Acute Interventions◦Monitor the patient’s ongoing physical and
emotional status to detect subtle changes in the patient’s condition
◦Plan and implement nursing interventions and therapy
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Acute Interventions◦Evaluate the patient’s response to therapy◦Provide emotional support to the patient and family◦Collaborate with other members of the health team
when warranted
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◦Neurologic status: Orientation and level of consciousness
◦Cardiac status ◦Continuous ECG ◦VS, capillary refill◦Hemodynamic parameters: central venous pressure,
PA pressures, CO, PAWP◦Ongoing assessment of CO
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Respiratory status ◦Respiratory rate and rhythm◦Breath sounds◦Continuous pulse oximetry ◦Arterial blood gases ◦Many patients will be intubated and mechanically
ventilated
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Urine output Tympanic or pulmonary arterial
temperature Skin: Temperature, pallor, flushing,
cyanosis, diaphoresis, piloerection Bowel sounds
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Nasogastric drainage/stools for occult blood I&O, fluid and electrolyte balance Oral care/hygiene based on O2
requirements Passive/active range of motion
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Assess level of anxiety and fear◦ Medication PRN◦ Talk to patient◦ Visit from clergy◦ Family involvement◦ Comfort measures◦ Privacy
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Normal or baseline, ECG, BP, CVP, and PAWP Normal temperature Warm, dry skin Urinary output >0.5 ml/kg/hr Normal RR and SaO2 ≥90% Verbalization of fears, anxiety