title: A phantom with pulsating artificial vessels for non-invasive fetal pulse oximetry.
abstract: Arterial oxygen saturation of the fetus is an important parameter for monitoring its physical condition. During labor and delivery the transabdominal non-invasive fetal pulse oximetry could minimize the risk for mother and fetus, compared to other existing invasive examination methods. In this contribution, we developed a physical-like phantom to investigate new sensor circuits and algorithms of a non-invasive diagnostic method for fetal pulse oximetry. Hence, the developed artificial vascular system consists of two independent tube systems representing the maternal and fetal vessel system. The arterial blood pressure is reproduced with a pre-pressure and an artificial vascular system. Each pulse wave can be reproduced, by digital control of a proportional valve, adjustable viscoelastic elements, and resistances. The measurements are performed by pressure transducers, optical sensor units, and a coplanar capacitive sensor. Transmission and reflection measurements have shown that the fetal and maternal pulse waves can be reproduced qualitatively. The measured light represents the transabdominal modulated signal on an abdomen of a pregnant woman.
authors.forename: Daniel
authors.initials: D
authors.lastname: Laqua
authors.forename: Stefan
authors.initials: S
authors.lastname: Pollnow
authors.forename: Jan
authors.initials: J
authors.lastname: Fischer
authors.forename: Sebastian
authors.initials: S
authors.lastname: Ley
authors.forename: Peter
authors.initials: P
authors.lastname: Husar
mesh_terms: D000005:Abdomen; D001187:Artificial Organs; D036861:Delivery, Obstetric; D004867:Equipment Design; D005260:Female; D005312:Fetal Blood; D005323:Fetal Monitoring / Q000379:methods*; D006339:Heart Rate; D006340:Heart Rate, Fetal; D006801:Humans; D007743:Labor, Obstetric; D010092:Oximetry / Q000295:instrumentation / Q000379:methods*; D010100:Oxygen / Q000097:blood; D019047:Phantoms, Imaging; D010991:Plethysmography / Q000379:methods; D011247:Pregnancy; D012815:Signal Processing, Computer-Assisted
chemical_list: D010100:Oxygen