A preliminary evaluation of ultrasonographic evidence of post-anesthetic atelectasis in dogs

Area of Study: 

Purpose of Study: 

Atelectasis, or temporary collapse of portions of the lung tissue, is a common occurrence in dogs undergoing anesthesia.

This does not present a problem in most healthy dogs, but in some, it can lead to complications during or after anesthesia.

The usual way that atelectasis has been identified in dogs has been via advanced imaging, such as CT scans.

In humans, ultrasound has been explored as an alternative technique to detect atelectasis.

The purpose of this study is to determine whether lung ultrasound, a minimally invasive and more accessible imaging technique, can be used

to identify atelectasis by assessing whether some of the same ultrasound findings described in humans with atelectasis can also be identified

in dogs undergoing anesthesia. A better understanding the use of ultrasound for this purpose may facilitate targeted treatments and improve

the care we are able to provide to patients in the future.


Dogs at age: 6 months – 7 years old

Health Status: ASA I-II (no severe systemic disease)

Procedure: Elective surgical procedure (soft tissue or orthopedic surgery service)

Positioning in dorsal recumbency for surgical procedure


Dog with a history or demonstration of aggression behavior
Dog with health concerns of pulmonary or cardiovascular disease
Dogs undergoing laparoscopic procedures

Client Responsibilities: 

If you agree to have your dog participate in this study, the participation will last for the duration of their scheduled anesthesia and surgery.

we will perform two times lung ultrasound and one time arterial blood gas sample from your pet for the syudy.

Client Benefits: 

You will not have costs from your animal’s participation in this study.

You will be responsible for any costs associated with the normal course of treatment, the treatment of any complications that may arise, and unrelated medical conditions.

You will not be compensated for your animal’s participation in this study.

However, as part of the study, we will gain additional diagnostic information about your dog from the lung ultrasound images and arterial blood gas sampling that will be performed.


You are encouraged to ask questions at any time during this study.

For further information about the study, contact Emily Wheeler at 515-294-4900