Limitations of the Use of Pressure Waves to Verify Correct Epidural Needle Position in Dogs

Table 1

2×1 table used to calculate the sensitivity of the epidural pressure waves recording in comparison with the standard technique. The epidural pressure waves’ test sensitivity was determined by the number of positive subjects divided by the total number of subjects in which, according to the standard technique, the epidural needle was successfully placed.

	Correct needle position; (number of subjects)
Positive	38
Negative	16
Total	54