Table 1.

Ultrasonography assessment of the diaphragm

Number of patients	Diaphragm assessment 20 min after cervical 5 and 6 ventral rami block			Diaphragm assessment half an hour after extubation
	Quiet breathing	Deep breathing	Sniff test	Quiet breathing	Deep breathing	Sniff test
6	No	No	Negative	No	No	Negative
1	No	No	Negative	No	<50%	Negative
4	No	<50%	Negative	No	<50%	Negative
1	No	< 50%	Negative	Yes	>50%	Positive
1	No	<50%	Negative	No	>50%	Positive