Gastric Dilatation-Volvulus (Canine) — NAVLE Prep

Quick anchor

Trigger

Deep-chested dog + unproductive retching

First step

Shock stabilization + decompression

Confirm

Right lateral radiograph

Trap

Do not wait for perfect diagnostics

Exam core — read this first

Classic pattern → unproductive retching, distended tympanic abdomen, shock

Immediate priorities → IV fluids + gastric decompression

Best confirmatory view → right lateral abdominal radiograph

Definitive management → surgery with gastropexy

Pattern recognition

Core pattern

Unproductive retchingAbdominal distensionRapid shock

Supporting clues

RestlessnessHypersalivationDeep-chested breedWeak pulsesTympany

NAVLE trigger: Retching without producing vomit in a distended, crashing deep-chested dog is GDV until proven otherwise.

Decision core — what NAVLE actually asks

Shocky patient

→ Large-bore IV access, fluids, and decompression first

Need confirmation after initial stabilization

→ Right lateral abdominal radiograph to identify compartmentalized stomach

After stabilization and diagnosis

→ Surgery with derotation, stomach assessment, and gastropexy

Key interpretation

Radiograph

Compartmentalized stomach

Classic right lateral finding

Lactate

May be high

Higher values suggest worse perfusion

ECG

Arrhythmias possible

Monitor during and after surgery

Perfusion

Shocky

Treat the patient, not the image first

Abdomen

Tympanic distension

Physical exam matters

Spleen

May be displaced

Often involved but not the main clue

⚠ Right lateral abdominal radiographs are the common board answer for confirming GDV after the patient is being stabilized.

Treatment

Step 1

Aggressive IV shock therapy

Restore perfusion while preparing decompression.

Step 2

Gastric decompression

Orogastric tube if possible, trocarization if needed.

Step 3

Surgery with gastropexy

Definitive therapy; medical stabilization alone is not enough.

NAVLE traps — where students lose marks

Do not wait for full lab work before acting

The shock and pressure problem is immediate.

Simple bloat is not the same as volvulus

The radiograph question is often testing that difference.

Trocarization is acceptable when tube passage fails

Boards want decompression, not paralysis by perfectionism.

Medical stabilization alone is not definitive

The dog still needs surgery and gastropexy.

Differentials — how to separate these on NAVLE

Fast separator: GDV is the crashing deep-chested dog with unproductive retching and abdominal tympany. The board contrasts it with simple dilation and other acute abdomen causes.

Disease	Retching	Radiograph	Key separator
GDV	Common	Compartmentalized stomach	Shock + distension + surgical disease
Simple gastric dilation	Possible	No compartmentalization	Stomach dilated but not twisted
Acute pancreatitis	Vomiting more than retching	Nonspecific	No classic tympanic abdominal distension
Splenic torsion	Absent	Different mass effect	Can look shocky but lacks classic retching
Hemoabdomen	Absent	Loss of detail	Weak pulses without gas-distended abdomen

30-second revision

Classic patternDeep-chested dog + retching + distension

First moveFluids + decompression

ConfirmRight lateral radiograph

Definitive therapySurgery + gastropexy

MonitorPerfusion and arrhythmias

Critical distinctionGDV vs simple dilation

Critical trapDo not delay treatment for perfect diagnostics

Practice questions

Pre-built NAVLE-style · Gastric dilatation-volvulus

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Q1Recognition

Which patient presentation is most classic for canine GDV?

Q2First step

What is the most appropriate immediate action in the unstable GDV patient?

Q3Imaging

Which radiographic study is most classically used to confirm GDV after initial stabilization?

Q4Definitive care

After initial stabilization and diagnosis of GDV, what is the definitive treatment?

Q5Trap question

Which statement about canine GDV management is most accurate?