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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)