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Published byWalter Bendon
Modified over 4 years ago
A messy on call
Mr James Age 48 Works as head lad in racing Vomited Seen at home and is drowsy but also noted that he has some coffee grounds in his vomit
Questions What does the story suggest? What might have caused this? Can you think of possible causes?
Admitted to hospital Seen in Accident department Examination Slightly yellow Dupytren’s contracture Spider naevi Abdomen – looks bloated Tip of spleen is felt
Questions What are the causes of the clinical signs? Why is his spleen enlarged?
Questions What is portal hypertension and what are the effects? How can you tell clinically
Sudden deterioration Collapses Low blood pressure Very drowsy Passes very smelly and black stools
Questions What is this called? Why has he collapsed?
Then Massive vomit 2 litres of bright red fresh blood BP now just palpable Carotid pulse 120 Cannot feel radial pulse Sweating
Questions What might have happened now? What would you need to do to help him? What investigations would you arrange in the emergency department? What test might he need now?
Oliguria What does this mean? Why does this occur? What is the risk if this is not treated?
Shock What do we mean by shock? What are the main types of shock?
WHAT IS SHOCK? Inadequate Tissue Perfusion
Symptoms of Shock Anxiety /Nervousness Dizziness Weakness Faintness Nausea & Vomiting Thirst Confusion Decreased UO Hx of Trauma / other illness Vomiting & Diarrhoea Chest Pain Fevers / Rigors SOB General SymptomsSpecific Symptoms
Signs of Shock Pale Cold & Clammy Sweating Cyanosis Tachycardia Tachypnoea Confused / Agitated Unconscious Hypotensive Stridor / SOB
Circulatory Homeostasis BP = CO X PVR CO – Cardiac Output PVR – Peripheral Vascular resistance Tissue perfusion is driven by blood pressure
What makes up blood volume Plasma RBCs WBCs Platelets
What Alters Blood Volume? Haemorrhage Plasma Loss Redistribution of Extracellular Volume
Heart Rate Heart rate increases as a compensatory response to Shock Rarely you get High Output failure Heart rate too fast to allow adequate refilling of heart between beats
Peripheral Vascular Resistance PVR regulated by ARTERIOLAR tone. Dilatation opens Arteriovenous beds & increases volume of circulatory system
What Alters PVR? Circulation cytokines & Inflammatory mediators (e.g. Histamine) Endotoxins Drugs (e.g. Nitrates)
Types of Shock Hypovolaemic Cardiogenic Redistributive
Hypovolaemic Volume Loss Blood loss -Haemorrhage Plasma Loss-Burns / Pancreatitis ECF Loss- V&D
Cardiogenic Pump Failure May be due to inability of heart to Contact Inability of heart to pump blood
Redistributive Decreased Peripheral Vascular Resistance Septic Shock Spinal / Neurogenic Shock ANAPHYLACTIC shock
The Physiology of Shock
Shock. Important formulas Stroke Volume = End dyastolic volume – End systolic volume Cardiac output = Stroke volume x Heart rate Blood pressure = Cardiac.
Hemodynamic Disorders. Fluid Distribution ~60% of lean body weight is water ~2/3 is intracellular ~1/3 is extracellular (mostly interstitial) ~5% of total.
1 Bleeding and Shock Pipes, pump, and fluid…really, it’s that simple!
1 Shock Pakistan ICITAP. Learning Objectives Learn how shock occurs Know different types of shock Identify signs and symptoms of shock Demonstrate.
SHOCK. Objectives Understand what shock is Understand what shock is Define types of shock Define types of shock Understand Pathophysiology of shock Understand.
MAP = CO * TPR CO = SV * HR SV = EDV - ESV
National Ski Patrol, Outdoor Emergency Care, 5th ©2012 by Pearson Education, Inc., Upper Saddle River, NJ BRADY Shock Chapter 10.
CLARA AND SARAH Shock. Learning Outcomes Define shock List the categories of shock Explain the physiological consequences of shock Compare physiological.
Shock WCS Teaching Evening. What is shock? Acute failure of circulation resulting in impaired or absent perfusion to tissues and subsequent insufficient.
SHOCK Dr.Mohammed Sharique Ahmed Quadri Assistant Prof.Physiology Almaarefa College.
LESSON 9 SHOCK 9-1.
SHOCK Dr.Mohammed Sharique Ahmed Quadri Assistant Prof.Physiology
Pages LEQ: When caring for a shock victim, how does the type of shock determine the treatment?
1 Shock Terry White, RN. 2 SHOCK Inadequate perfusion (blood flow) leading to inadequate oxygen delivery to tissues.
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