How is lung lobe torsion diagnosed?

Your vet will typically start with a physical examination and chest radiographs. If needed, thoracic ultrasound or a CT scan may be added to confirm the affected lung lobe's position and identify any complications. The final diagnosis is based on the integration of imaging findings and clinical assessment.

What can I do at home to help the vet?

Record short clips of coughing and breathing difficulties, note when symptoms started and how they have changed, and bring a list of recent medications. This information helps your vet assess the situation quickly and plan appropriate tests.

What is the prognosis for lung lobe torsion?

Prognosis depends on the severity of the condition and how promptly it is treated. When detected early and managed appropriately, the chance of recovery is higher. Follow your vet's recommendations and keep all follow-up appointments.

Does a chest CT scan always require general anaesthesia?

In most cases, a CT scan requires short-term sedation or general anaesthesia to minimise movement and obtain clear images. Whether this is necessary is assessed by the veterinary team, who will explain the risks and rationale to the owner.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Lung Lobe Torsion in Dogs & Cats: Symptoms, Imaging & Care Guide [2025]

Lung lobe torsion is a life-threatening emergency in which a lung lobe rotates on its axis, cutting off blood supply, and requires urgent surgical removal of the affected lobe.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: AAHA, WSAVA, National Taiwan University Veterinary Teaching Hospital

When to See a Vet

Seek Emergency Care Immediately

•Rapid breathing with open-mouth gasping and inability to calm down
•Purple or bluish gums or tongue suggesting possible oxygen deprivation
•Sudden collapse or abrupt loss of ability to move

Schedule a Clinic Visit Soon (within 24–72 hours)

•Persistent decline in energy and noticeably reduced appetite
•Ongoing or frequent coughing with increased discharge
•Faster breathing or wheezing even at rest

01What symptoms indicate a problem?

Lung lobe torsion commonly causes changes in breathing and overall condition. Early signs can be subtle, but as the condition worsens, obvious respiratory distress and changes in alertness and appetite will appear.

Noticeably reduced energy or activity levels, with less interest in playing
Significantly decreased appetite or refusal to eat, with rapid weight loss
Elevated body temperature or signs of fever, with general malaise
Persistent or frequent coughing, possibly with increased mucus or secretions
Rapid or laboured breathing even at rest or when quiet
Increased heart rate or irregular heartbeat, more pronounced during activity
If symptoms persist or worsen, arrange a veterinary consultation as soon as possible

Seek emergency care immediately if you notice the following symptoms:

⚠️ Severe breathing difficulty or open-mouth panting requires immediate emergency care
⚠️ Blue or purple gums or tongue, suggesting oxygen deprivation
⚠️ Sudden collapse or extreme weakness with loss of responsiveness

02How to assess the situation at home? Key observations and when to go to the emergency clinic

Observing and recording key changes at home helps your vet assess the condition — take photos, record short videos, and note the timing and frequency of symptoms.

Monitor changes in alertness and exercise tolerance, and note when the deterioration began
Track daily appetite, number of meals eaten, and any episodes of food refusal
Measure and record body temperature daily, noting the time of each reading
Record short video clips of coughing and breathing difficulties to show the vet
Note the frequency of urination and defecation and check for any abnormal appearance or blood
Bring all records and videos to your vet appointment as reference material

03How does the vet diagnose this condition? Common diagnostic tests

The veterinary team will combine physical examination and imaging studies to evaluate for lung lobe torsion and any complications, with referral to a specialist centre if advanced imaging is needed.

Physical examination

including auscultation and palpation to assess breath sounds and chest abnormalities

Blood and biochemistry panel

to evaluate for infection, inflammation, and organ function

Urinalysis

to rule out other medical conditions or systemic disease

Thoracic ultrasound

to assess pleural effusion and changes in lung lobe position

Chest radiographs (X-ray)

to evaluate lung patterns, lung collapse, or pleural effusion

CT scan

for more precise lung lobe localisation and pre-surgical assessment

If further management is required, referral to a hospital with advanced imaging and thoracic surgery capability is recommended

04What treatment and care is needed after diagnosis? Medications, diet adjustments, and home care guide

Treatment depends on disease severity. In the acute phase, hospitalisation with supportive care and imaging-guided assessment may be required. Close monitoring of breathing and activity levels is essential after discharge.

In the acute phase, hospitalisation for monitoring and provision of oxygen therapy or supportive care may be necessary
Your vet will determine whether antibiotics or other symptomatic treatments are needed based on the clinical picture
If indicated, surgical intervention (lung lobectomy) or further imaging assessment may be arranged
Restrict activity after discharge and continue monitoring breathing, appetite, and elimination
Schedule follow-up imaging (X-ray or ultrasound) and blood tests as directed by your vet
If symptoms change or worsen, return to your vet or seek specialist follow-up immediately

05What should you prepare before the vet visit? Key information to help your vet diagnose quickly

Record several short video clips of coughing and breathing — both at rest and during activity

Note when symptoms first appeared and how they have progressed or changed in frequency

Describe any change in exercise tolerance compared with your pet's normal activity level

List recent changes in appetite, water intake, and frequency of urination and defecation

Bring a list of current medications, supplements, or recent veterinary records

Use a secure carrier and call ahead to book an appointment, informing the clinic of the urgency

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.