Shock
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Shock. Important formulas. Stroke Volume = End dyastolic volume – End systolic volume Cardiac output = Stroke volume x Heart rate Blood pressure = Cardiac output x Systemic Vascular Resitance. Define Shock.

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Shock

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Shock

Shock


Important formulas

Important formulas

Stroke Volume = End dyastolic volume – End systolic volume

Cardiac output = Stroke volume x Heart rate

Blood pressure = Cardiac output x Systemic Vascular Resitance


Define shock

Define Shock

Acute circulatory failure resulting in inadequate or disordered tissue perfusion and insufficient oxygen supply to cells


Name the 5 types of shock

Name the 5 types of shock

  • He - Hypovolaemic

  • Called - Cardiogenic

  • Me - Mechanical(obstructive)

  • A - Anaphylactic

  • Sadist - Septic


Hypovolemic shock

Hypovolemic Shock

What is hypovolemic shock?

Shock caused by an insufficient volume of blood

What are the causes of hypovolemic shock?

Major trauma (blood loss), Diarrhoea/Vomiting, massive blood loss during surgery, burns


Hypovolemic shock1

Hypovolemic Shock

What are the signs of hypovolemic shock?

Tachycardia, hypotension, thready pulse, oliguria, cold clammy peripheries, Altered GCS


Cardiogenic shock

Cardiogenic Shock

What is cardiogenic shock?

Failure of the heart to pump effectively

What causes cardiogenic shock?

Myocardial infarction, valvular disease, myocarditis, endocarditis


Cardiogenic shock1

Cardiogenic Shock

What are the signs of cardiogenic shock?

Pulmonary oedema, increased central venous pressure, murmurs, S3/S4, hypodynamic circulation, oliguria


Septic shock

Septic Shock

What is septic shock?

Shock caused by impaired utilisation of oxygen by cells

What are the causes of septic shock?

Hospital admission, diabetes, hospital admission, immunocompromised.


Septic shock1

Septic Shock

What are the signs of septic shock?

Toxic look – warm and flush, tachycardia and hypotension


Anaphylactic shock

Anaphylactic Shock

What are the causes of Anaphylactic Shock?

Anapylaxis, Anaphylactoid

What are the signs of anaphylactic shock?

Angiooedema, Stridor/Bronchospasm


Mechanical obstructive

Mechanical/Obstructive

What is mechanical shock?

Obstruction of blood flow outside the heart

What are the causes of obstructive shock?

Tension pneumothorax, Pulmonary embolism, Pericardial tamponade


Mechanical obstructive1

Mechanical/Obstructive

What are the signs of mechanical shock?

Tachynpnoea, increased CVP, reduced air entry, muffled heart sounds


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