The physiologic responses to a fluid bolus administration in old and young healthy adults

Table 2 Hemodynamics before, during and after 0.9% NaCl 10 mL/kg fluid bolus

	Time	Baseline	Pre-Bolus	Post-Bolus	Study End
		M ± SEM	M ± SEM	M ± SEM	M ± SEM
Mean Arterial Pressure (mmHg)	Younger	82 ± 3	83 ± 2	83 ± 3	80 ± 2
Mean Arterial Pressure (mmHg)	Older	90 ± 2	90 ± 2	87 ± 3	92 ± 4
Heart Rate (bpm)	Younger	66 ± 3	63 ± 2	65 ± 1	64 ± 3
Heart Rate (bpm)	Older	66 ± 4	61 ± 4	67 ± 3	62 ± 3
Cardiac Output (L/min)	Younger	5.3 ± 0.2	5.2 ± 0.1	6.3 ± 0.3	5.4 ± 0.2
Cardiac Output (L/min)	Older	5.5 ± 0.3	5.1 ± 0.3	6.5 ± 0.3	5.3 ± 0.3
*Systemic Vascular Resistance (dynesec/cm**.⁵)	Younger	1246 ± 57	1265 ± 34	1062 ± 48	1195 ± 28
*Systemic Vascular Resistance (dynesec/cm**.⁵)	Older	1348 ± 73	1445 ± 77	1079 ± 51	1404 ± 83

M Mean, SEM Standard error of the mean, bpm – beats per minute, sec second, min minute, L liter, cm centimeter, dyn dyne
Baseline – 30 min before fluid bolus, pre-bolus – immediately before fluid bolus, post-bolus – immediately after fluid bolus, study end – 120 min after start of fluid bolus

ISSN: 2047-0525