Abstract
Tethering with maternal and fetal catheterization is a preparation that gives researchers direct access to the physiological status of both mother and fetus without the need for anesthesia or restraint. The technique involves the use of a flexible hollow metal cable that attaches at one end to a nylon jacket worn by the female and at the other end to a freely rotating turntable at the center-top of the cage. The tether could also exit the cage through the back wall, but the top-of-cage configuration allows the instrumented mother to move about the cage as freely as a noninstrumented animal (Morton et al., 1987). Catheters protected by the cable can be implanted in both mother and fetus as well as in the amniotic cavity. Using this preparation, a researcher can manipulate the fetus, deliver drugs, draw blood or amniotic fluid, and monitor intrauterine pressure along with maternal and fetal blood pressure and heart rate. With the use of electrodes implanted to measure muscle function, fetal behavior can even be assessed. In addition, it may soon be possible to visualize the fetus in utero using a specialized catheter adapted for use with ultrasound technology.
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Xavier Novak, M.F.S. (2006). Tethering with Maternal and Fetal Catheterization as a Model for Studying Pre- to Postnatal Continuities. In: Sackett, G.P., Ruppentahal, G.C., Elias, K. (eds) Nursery Rearing of Nonhuman Primates in the 21st Century. Developments in Primatology: Progress and Prospects. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-25640-5_24
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