The invention relates to a sensor device as part of a measurement appliance with
a measurement device for the measurement of vital parameters of a foetus during
labor and delivery, in particular the oxygen content of the blood of the foetus.
Such sensor devices should be applied to the tissue of the foetus in a secure and
light-tight manner, and furthermore at least the carrier or sensor should be able
to be fitted to the foetus gently and easily. According to the invention, the sensor
device comprises a shell-type carrier, which is subdivided into an approximately
centrally arranged attachment zone and a surrounding zone, which can be brought
into contact with the tissue of the foetus, and the attachment zone is provided
with a spiral-type attachment element for attaching the carrier to the leading
part of the foetus, and the rotational axis of the attachment element is arranged
approximately perpendicular to the surface of the carrier to be fitted to the leading
part of the foetus. The surrounding zone comprises at least one light emitter and
at least one receiver, whereby the attachment element is supported for rotation
with respect to the surrounding zone.