Ultrasonographic Imaging of Normal and Impacted Omasum in Indian Crossbred Cows

Table 1

The size and extent of omasal margins as measured ultrasonographically in the 7th to 11th intercostal spaces of clinically healthy cows and cows with omasal impaction.

Group	Measurement (cm) in each intercostal space indicated as mean ± SD, (minimum-maximum)
Healthy cows (𝑛=10)	Dorsal margin	11th	10th	9th	8th	7th
		30.3±2.31	31.3±2.75	37.5±3.14	43.9±2.95	50.3±3.49
		(25.3−35.3)	(26.2−35.4)	(29.69−41.32)	(37.5−48.8)	(42.4−56.7)
	Ventral margin	55.3±3.44	61.8±3.13	68.6±3.53	59.4±3.2	61±3.73
		(45.5−58.2)	(56.4−72.6)	(60.3−79.5)	(54.4−64.8)	(56.6−63.3)
	Mean dorso-ventral extent^§	25.0	30.5	31.1	15.5	10.7
Cows with omasal impaction (𝑛=5)	Dorsal margin	32.14±2.84	32.22±2.63	38.32±2.89	42.46±2.62	52.21±2.49
		(26.2−36.3)	(26.1−36.4)	(28.8−42.7)	(34.4−46.2)	(45.4−55.3)
	Ventral margin	54.18±2.97	62.43±2.51	70.43±2.66	60.31±2.83	62.26±2.73
		(46.7−56.3)	(56.8−73.9)	(59.8−77.4)	(52.1−66.3)	(57.3−64.5)
	Mean dorso-ventral extent^§	22.0	30.2	32.1	17.8	10.1

^§Significant differences were not observed in the results from cows with omasal impaction compared with healthy cows (𝑃>.05, unpaired t-test).