STEP 1 — MCQs (NO answers here)

MCQ 1 — General Morphology of Shock

The tissue effects seen in shock mainly represent:

a. Hyperplastic proliferation

b. Autoimmune cell injury

c. Hypoxic injury due to hypoperfusion and microvascular thrombosis

d. Viral cytopathic change

e. Purely mechanical trauma

MCQ 2 — Organs Commonly Affected

Which organs are MOST commonly involved in shock-related injury?

a. Brain, heart, kidneys, adrenals, GI tract

b. Skin, spleen, pancreas only

c. Liver exclusively

d. Skeletal muscle only

e. Thyroid, pancreas, and bone marrow

MCQ 3 — Fibrin Thrombi Visibility

Fibrin thrombi can appear in any tissue, but are most readily visualized in:

a. Brain cortex

b. Adrenal medulla

c. Glomeruli of kidneys

d. Myocardium

e. Alveolar capillaries

MCQ 4 — Adrenal Morphology

Adrenal cortical lipid depletion in shock reflects:

a. Autoimmune destruction

b. Increased use of stored lipids for steroid synthesis during stress

c. Diminished ACTH

d. Loss of cortical cells only in sepsis

e. Fat embolism

MCQ 5 — Lung Vulnerability

Which statement about lung involvement in shock is TRUE?

a. Lungs are equally damaged in all forms of shock

b. Hypovolemic shock commonly causes diffuse alveolar damage

c. Sepsis or trauma can precipitate diffuse alveolar damage (“shock lung”)

d. Lungs undergo coagulative necrosis first

e. Lungs are the earliest organ to fail in all shock types

MCQ 6 — Recovery Potential

Which tissue injuries in shock are least reversible?

a. Hepatocyte swelling

b. Loss of neuronal and cardiomyocyte cells

c. Renal tubular vacuolization

d. Adrenal cortical lipid depletion

e. GI mucosal erosions

MCQ 7 — Clinical Features: Hypovolemic/Cardiogenic Shock

Typical early clinical findings in hypovolemic or cardiogenic shock include:

a. Warm, flushed skin

b. Hypotension, weak rapid pulse, cool clammy cyanotic skin

c. Bradycardia and hypertension

d. Fever and rash

e. Severe polyuria

MCQ 8 — Clinical Features: Septic Shock Skin

Which skin finding is characteristic of early septic shock?

a. Cold, clammy skin

b. Livedo reticularis

c. Warm, flushed skin due to vasodilation

d. No cutaneous change

e. Petechiae only

MCQ 9 — Life Threat in Shock

The primary threat to life during shock is:

a. Electrolyte imbalance

b. The initiating event (e.g., MI, hemorrhage, infection)

c. Tachypnea

d. Skin changes

e. Adrenal lipid depletion

MCQ 10 — Renal Consequences in Survivors

If a patient survives the initial phase of shock, the next dominant pattern often includes:

a. Massive diuresis

b. Progressive oliguria, acidosis, electrolyte disturbances

c. Complete recovery within hours

d. Resolution of all symptoms

e. Persistent hypertension

MCQ 11 — Prognosis

Which shock type has the BEST prognosis with proper management?

a. Cardiogenic shock

b. Septic shock

c. Neurogenic shock

d. Hypovolemic shock in young healthy patients

e. Shock due to pancreatitis

MCQ 12 — Survival Percentages

What is the approximate survival rate for young, otherwise healthy patients with hypovolemic shock when treated appropriately?

a. 10%

b. 30%

c. 50%

d. 70%

e. >90%

STEP 2 — ANSWERS WITH SHORT EXPLANATIONS

MCQ 1 — c

Shock = hypoxic injury from hypoperfusion + microvascular thrombosis.

MCQ 2 — a

Most commonly involved: brain, heart, kidneys, adrenals, GI tract.

MCQ 3 — c

Fibrin thrombi are most easily seen in glomeruli.

MCQ 4 — b

Adrenal lipid depletion reflects increased steroid synthesis during stress.

MCQ 5 — c

In sepsis or trauma, lungs → diffuse alveolar damage (“shock lung”).

MCQ 6 — b

Neurons + cardiomyocytes do not regenerate, so their loss is irreversible.

MCQ 7 — b

Hypovolemic/cardiogenic shock → hypotension, weak rapid pulse, cool/clammy/cyanotic skin.

MCQ 8 — c

Septic shock → early warm, flushed skin due to vasodilation.

MCQ 9 — b

Main threat is the initiating pathology (MI, hemorrhage, infection).

MCQ 10 — b

Later phase dominated by oliguria, acidosis, electrolyte imbalance.

MCQ 11 — d

Hypovolemic shock in young healthy patients → >90% survival with treatment.

MCQ 12 — e

Correct survival rate = more than 90%.

STEP 3 — HIGH-YIELD NOTES (MORPHOLOGY & CLINICAL FEATURES OF SHOCK)

1. General Morphology

• Shock = hypoxic injury due to:
• Hypoperfusion
• Microvascular thrombosis
• Most commonly affected organs:
• Brain
• Heart
• Kidneys
• Adrenals
• GI tract
• Fibrin thrombi: can occur anywhere but best seen in renal glomeruli.
• Adrenal cortex:
• Lipid depletion = steroid synthesis during stress, same as in any severe stress response.
• Lung response:
• Resistant to hypoxia in pure hypovolemia (e.g., hemorrhage).
• BUT sepsis or trauma → diffuse alveolar damage = “shock lung” or ARDS.

2. Reversibility

• If patient survives, most tissues recover completely.
• Exceptions (permanent loss):
• Neurons
• Cardiomyocytes

3. Clinical Features

Hypovolemic & Cardiogenic Shock

• Hypotension
• Weak, rapid pulse
• Tachypnea
• Cool, clammy, cyanotic skin (due to vasoconstriction)

Septic Shock

• Warm, flushed skin at onset (due to peripheral vasodilation)

Primary Threat

• Always the underlying initiating event:
• Myocardial infarction
• Severe hemorrhage
• Bacterial infection

These rapidly trigger cardiac, cerebral, and pulmonary deterioration.

4. Renal Phase After Initial Survival

• Progressive:
• Oliguria
• Acidosis
• Electrolyte imbalances

5. Prognosis

• Depends on:
• Cause of shock
• Duration
• Patient condition
• Young healthy hypovolemic shock patients:
• >90% survival with good management
• Septic and cardiogenic shock:
• Much worse prognosis despite aggressive care