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FARMAKOLOGI : DARAH & PERDARAHAN ( 3 ) HEMODYNAMIC & SHOCK
SULANTO SALEH-DANU R.,dr.,SpFK. DEPT. FARMAKOLOGI & TERAPI FAKULTAS KEDOKTERAN UGM FARMAKOLOGI : DARAH & PERDARAHAN ( 3 ) HEMODYNAMIC & SHOCK
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HAEMODYNAMIC and SHOCK
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HEMODYNAMICS. Hemodynamic, pertaining to the movements
Is the study of the relationship between PRESSURE, RESISTANCE and the FLOW of BLOOD in the cardiovasluar system. ( Aaronson, PI. & Ward J P T., 2000) Is the study of the movement of the blood and the forces concerned there in. ( Doorland’s Illustrated Medical Dictionary, 27th ed., 1988). Hemodynamic, pertaining to the movements involved in the circulation of the blood. ( Doorland’s Illustrated Medical Dictionary, 27th ed.,1988)
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CO = (MABP-CVP)/ TPR CO = cardiac output, MABP = mean arterial
blood pressure, TPR = total peripheral resistance, CVP = central venous pressure (copy from : Aaronson,PI., Ward,J.P.T., 1999)
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AO = aorta Lg. arteries = large arteries Sm.arteries = small arteries ART = arterioles CAP = capillaries VEN = venule SV = venous Sm veins = small veins Lg veins = large veins
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HEMODYNAMIC EMERGENCY
PRESSURE : - hypertension - hypotension RESISTANCY : - obtruction of vessel - peripheral vasoconstriction - massive bleeding FLOW OF THE BLOOD : - blood viscocity - angina/O2 supply
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BLOOD PRESSURE HAEMODYNAMICS PRESSURE RESISTANCE FLOW OF BLOOD
- Stroke / CVA - Vital organ damages. PRESSURE Hypertension Hypotension - Shock RESISTANCE Vasoconstriction. Obstruction Thrombus Emboli FLOW OF BLOOD Scleroting of areteries Increase of velocity Hematokrit BLOOD PRESSURE
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HYPOTENSION SHOCK
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EMERGENCY ACTION BLOOD PRESSURE HYPOTENSION SHOCK organs perfusion
ORGANS / TISSUES DAMAGES
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DEATH BLOOD FLOW ORGANS PERFUSION CRITICAL PERIODE REVERSEIBLE
IRREVERSIBLE CELLULAR / TISSUE / ORGAN INJURY DEATH
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Classification of shock by mechanism and common causes.
Hypovolemic shock Cardiogenic shock Obstructive shock Distributive shock ( Messina, L.M., et al., 2003 )
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Tissue & organ blood flow
Distributive shock Hypovolemic shock Cardiogenic shock Obstructive shock Severe Decrease in Systemic Vascular resistance Reduced Ability to Fill ventricle In diastole Severe Myocardial depression Reduced Systolic performance Reduced preload Decrease in Stroke volume Maldistribution Of blood flow In microcircul. Decrease in CO Hypotension Severe decrease in Tissue & organ blood flow Multiple organ system failure ( Parrillo, JE., 1991 )
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Hypovolemic shock Loss of blood (hemorrhagic shock)
- External hemorrhagic : trauma, gastrointestinal bleeding, etc. - Internal hemorrhagic : hematoma, hemothorax, hemoperitoneum. Loss of plasma : burns, exfoliative dermatitis. 3. Loss of fluid and electrolytes - External : vomiting, diarrhea, excessive sweating, hyperosmolar states (diabetic ketoacidosis, nonketotic coma) - Internal ( “third spacing”) : Pancreatitis, Ascites, Bowel obstruction.
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Cardiogenic shock - Dysrhythmia : - Tachyarrhythmia - Bradyarrhythmia
- “Pump failure” : secondary to myocardial infarction or other cardiomyopathy. - Acute valvular dysfunction (especially regurgitant lesions ) - Rupture of ventricular septum or free ventricular wall
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Obstructive shock Tension pneumothorax
Pericardial diseases ( tamponade, constriction) Diseases of pulmonary vasculature (massive pulmonary emboli, pulmonary hypertension) Cardiac tumor ( atrial myxoma ) Left atrial mural thrombus - Obstructive valvular diseases (aortic or mitral stenosis)
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- Acute adrenal insufficiency
Distributive shock - Septic shock - Anaphylactic shock - Neurogenic shock - Vasodilator drugs - Acute adrenal insufficiency
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TREATMENT and MANAGEMENT SHOCK
GENERAL MEASURE : “ ABC “ VENTILATION Oxygen supply Advanced Cardiogenic Life Support (ACLS) Folley Catheter urinary output Laboratory : blood count electrolyt glucose blood gas analyse coagulation parameter blood group bacterial cultur CENTRAL VENOUS PRESSURE ( CVP ) or PULMONARY CAPILLARY WEDGE PRESSURE (PCWP)
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I.V. LINE ( better use TRANFUSION SET )
3. VOLUME REPLACEMENT. I.V. LINE ( better use TRANFUSION SET ) HEMORRHAGIC SHOCK : BLOOD SUBSTITUTES / WHOLE BLOOD / PBRC (Packed Blood Red Cells) + isotonic solution preventing increase of Hmt. HYPOVOLEMIC SHOCK : Rapid bolus ISOTONIC CRISTALLOID 1 L CARDIOGENIC SHOCK : ISOTONIC CRISTALLOID ( smaller volume ) SEPTIC SHOCK : Large volume ISOTONIC CRISTALLOID. SHOCK in TRAUMA CAPITIS HYPERTONIC SALINE (7.5%) plus DEXTRAN.
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MEDICATIONS 4.1. VASOACTIVE THERAPY : INOTROPIC agents
VASOPRESSOR agents - AFTER ADEQUATE FLUID RESUSCITATION - DEPENDS ON CARDIAC OUTPUT Agents : - Dobutamine - Nor-adrenaline/Nor-epinephrine - Adrenaline/Epinephrine - Dopamine - Vasopressin ( antidiuretic hormon /ADH ) DISTRIBUTIVE/VASODILATOR SHOCK 4.2. CORTICOSTEROID SEPTIC SHOCK 4.3. Activated Protein C as antithrombotic, profibrinolytic and Anti-inflamatory ( SEPTIC SHOCK) 4.4. ANTIBIOTIC DEFINITIVE THERAPY in SEPTIC SHOCK 4.5. SODIUM BICARBONATE SEPTIC SHOCK with LACTIC ACIDOSIS
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PRINCIPLES SHOCK MANAGEMENT :
ALLEVIATING THE PRECIPITATING CAUSE OF SHOCK; TREATING THE HAEMODYNAMIC AND METABOLIC CONSEQUENCES; 3. MANAGING THE SECONDARY MEDICAL COMPLICATIONS ( renal failure; pulmonary oedema etc.) (Benowitz, N.L., et al., 1997)
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WASSALAMU'ALAIKUM W W
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