The use of Invos™ somatic oximetry to measure variations in placental tissue oxygenation in laboring healthy term parturients with epidural analgesia: an observational study

Figures & data

Table 1 Subjects characteristics

Age (years)a	27.6 (4.6)
BMI (kg/m^2)a	28.9 (2.6)
Gestational age (weeks)b	40 (39–40)
Primiparityc	10 (50)
Skin colorc
White	17 (85)
Black	3 (15)
S-P distance (cm)a
S-P distance >1.7 cmc	7 (35)
Oxytocin perfusionc	5 (25)

Notes:

a Mean (standard deviation),

b Median (interquartile range),

c N (%).

Abbreviation: S-P, skin-to-placenta.

Table 2 AUC measurements, for probe PLA, MYO and ARM, while patients were breathing room air and 100% oxygen

Probe	Room air	Oxygen	P-value
PLA (mm%)	60.40 (31.38)	54.55 (23.44)	0.4311
MYO (mm%)	56.80 (44.00)	44.50 (30.99)	0.2270
ARM (mm%)	127.70 (63.15)	132.70 (64.19)	0.6568

Notes: AUCs were presented as mean (SD). An analysis of variance for repeated measures test with Bonferroni’s multiple comparison test was applied.

Abbreviations: AUC, area under the curve; PLA, placental surface; MYO, the abdomen; ARM, the forearm; LEG, the leg.