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
Mini cases — apply the decision framework
Recognition
Great Dane with unproductive retching, weak pulses, and a distended tympanic abdomen arrives collapsed. What is your top diagnosis?
→ Gastric dilatation-volvulus
This is the classic board pattern.
First move
Before the abdominal radiograph is taken, what immediate treatment is expected in the unstable GDV patient?
→ IV fluids and gastric decompression
You stabilize while confirming, not the other way around.
Definitive plan
A dog improves after decompression and fluids. Is that the endpoint?
→ No — surgery with gastropexy is still needed
Medical stabilization alone is not definitive for GDV.
Clinical application tools
These support shock stabilization and perioperative thinking in a GDV case.
