Table 1.

The mean values of pulse rate and systolic or diastolic blood pressure.

Clinical parameters	Group	N	Mean	Std. deviation	Sig.
Systolic blood pressure, before injection	Bubble blower	35	103.54	13.753	0.312
	Control	35	107.03	11.808
Systolic blood pressure, after injection	Bubble blower	35	111.74	11.150	0.266
	Control	35	116.29	13.932
Differences of preinjection and postinjection systolic blood pressures	Bubble blower	35	7.91	7.83	0.537
	Control	35	9.26	9.93
Diastolic blood pressure, before injection	Bubble blower	35	69.89	9.492	0.970
	Control	35	71.43	9.787
Diastolic blood pressure, after injection	Bubble blower	35	74.60	7.732	0.281
	Control	35	76.11	9.815
Differences of preinjection and postinjection diastolic blood pressures	Bubble blower	35	4.71	8.34	0.925
	Control	35	4.69	8.43
Pulse rate, before injection	Bubble blower	35	98.49	14.506	0.426
	Control	35	96.34	12.480
Pulse rate, after injection	Bubble blower	35	108.60	13.567	0.574
	Control	35	109.51	13.804
Differences of preinjection and postinjection pulse rate	Bubble blower	35	9.83	9.86	0.051
	Control	35	13.91	11.76