. 2014 Jun 19;18(3):R126. doi: 10.1186/cc13932

Table 3.

Peripheral perfusion parameters recorded in the three different time points during execution of the study protocol (n = 15)

	T_BL1	T_MX	T_BL2
Capillary refill time, seconds	9.4 (0.6)	4.8 (0.3)^a	7.1 (0.8)^a
Tskin-diff, degrees Celsius	3.3 (0.7)	0.7 (0.6)^a	1.8 (0.6)^a
PI.log, percentage	-0.5 (0.2)	0.7 (0.1)^a	0.2 (0.1)^a
StO₂, percentage	75 (3.4)	84 (2.7)^a	79 (2.8)
Tissue hemoglobine index, arbitrary units	11.1 (1.3)	13.2 (1.4)^a	11.6 (1.2)^a
RincStO₂, n = 13, percentage per second	1.9 (0.08)	2.8 (0.05)^a	2.4 (0.09)^a
RdecStO₂, n = 13, percentage per minute	8.6 (0.5)	9.2 (0.6)	9.14 (0.7)

Data are presented as mean (standard error). ^aP <0.05: previous time point (linear model for repeated measurements). Time points are defined as before nitroglycerin infusion (T_BL1), at the maximum dose of nitroglycerin (T_MX), and 30 minutes after cessation of nitroglycerin (T_BL2). Rate of tissue oxygen saturation increase after arterial occlusion (RincStO₂) and rate of tissue oxygen saturation deoxygenation during arterial occlusion (RdecStO₂) were collected from 13 patients. PI, perfusion index; Tskin-diff, forearm-to-fingertip skin-temperature gradient.