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Table 3 The number of cats, the number of lungs, average attenuation number and characteristics of atelectatic lung (HU) in anesthetized healthy cats (Gr. 1) and non-anesthetized healthy cats (Gr. 2)

From: The evaluation of non-anesthetic computed tomography for detection of pulmonary parenchyma in feline mammary gland carcinoma: a preliminary study

Parameters

 

Gr. 1*

Gr.2*

Number of atelectatic cats

 

10/12

(83.3 %)

3/12

(25.0 %)

Normal lung

   
 

Number of lung lobes

60/84

(71.4 %)

80/84

(95.2 %)

 

Attenuation number (HU)

-698.4 ± 71.9

(-678.1 to -721.2)

-666.3 ± 56.0

(-554.6 to -731.1)

Atelectatic lung

   
 

Total number of lung lobes

24/84α

(28.5 %)

4/84α

(4.7 %)

 

Total attenuation number (HU)

-126.0 ± 70.2

(-39.7 to -364.3)

-381.5 ± 135.8

(-215.4 to -426.9)

 

-Poorly aerated lung tissue

22/84

(26.2 %)

4/84

(4.7 %)

 

Attenuation number (HU)

-174.0 ± 27.8

(-120.7 to -364.3)

-381.5 ± 135.8

(-215.4 to -426.9)

 

-Non-aerated lung

2/84

(2.3 %)

0/84

(0 %)

 

Attenuation number (HU)

-49.5 ± 13.8

(-39.7 to -59.3)

0

 

Characteristics

-Peripheral

Number of lung lobes

-Diffused

Number of lung lobes

-Peribronchial

Number of lung lobes

7/24

(29.2 %)

1/24

(4.2 %)

16/24

(66.6 %)

1/4

(25.0 %)

3/4

(75.0 %)

0/4

(0 %)

 

Locations

  
 

-Dorsal

6/24

(25.0 %)

1/4

(25.0 %)

 

-Ventral

17/24

(70.8 %)

0/4

(0.0 %)

 

-Diffused

1/24

(4.2 %)

3/4

(75.0 %)

  1. *The total number of cats and total number of lung lobe in each group were 12 and 84, respectively
  2. αThe association between anesthetic procedure and the presence of lung atelectasis was evaluated using the odds ratio: (OR = 15; CI 2.02–111.18; P = 0.0081)