Sammanfattning

The aim of this study was to investigate the extent of sympathetic nervous system activation during parturition in four unrestrained goats. Chronically implanted radiotelemetry devices registered heart rate and arterial blood pressure around the clock and blood was sampled for determination of plasma adrenaline and noradrenaline concentrations before, during and after labour. Two goats delivered two kids after moderately intensive abdominal contractions. A third goat had dystocia, and was treated with prostaglandin F-2 alpha One normal kid and one mummified foetus were delivered manually. After milking, a third kid was born spontaneously. The fourth goal experienced severe abdominal contractions and delivered one kid. Mean blood pressure was 69 +/- 2 mmHg the day before parturition, increased gradually during the labour pains, and reached a maximal value of 120 +/- 7 mmHg when the head of the first kid was visible (P less than or equal to 0.05). Hear? rate was 134 +/- 4 beats min(-1) the day before parturition and peaked when the first kid was born (159 +/- 6 beats min(-1), P less than or equal to 0.05), as did plasma adrenaline concentration (from 0.4 +/- 0.2 nmol L-1 to 2.7 +/- 1.2 nmol L-1, P less than or equal to 0.05). The concentration of noradrenaline increased from 4.8 +/- 2.3 nmol L-1 to 12.2 +/- 8.4 nmol L-1 (P less than or equal to 0.05), when the head of the first kid was visible. Expulsion of the second and third kids caused relatively smaller increases ir blood pressure, heart rats and catecholamines than those seen with the first born kid, it is concluded that changes in pressure, heart rate and catecholamines during parturition are related to the different phases of labour and not to its duration or severity.

Nyckelord

adrenaline; blood pressure; goat; heart rate; noradrenaline; parturition; radiotelemetry

Publicerad i

Acta Physiologica Scandinavica
1997, Volym: 161, nummer: 3, sidor: 295-302
Utgivare: BLACKWELL SCIENCE LTD

SLU författare

• Sandberg, Eva

  • Institutionen för djurfysiologi, Sveriges lantbruksuniversitet
    

• Olsson, Kerstin

  • Institutionen för djurfysiologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Medicinsk biovetenskap


Publikationens identifierare

DOI: https://doi.org/10.1046/j.1365-201X.1997.00223.x

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/95603