The sensitivity, specificity and predictive value of measuring calcium carbonate in mares' prepartum mammary secretions

Ley, William B.; Bowen, John M.; Purswell, B.J.; Irby, M. H.; Greive-Crandell, K.

doi:10.1016/0093-691x(93)90352-6

Cited by 31 publications

(34 citation statements)

References 8 publications

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“…Parturitions were induced on account of either customer's request or severe lactation only if mammary secretion calcium concentration (measured with flame spectrophotometer) was >10 mmol/L indicating fetal maturity (Ousey at al. 1984, Le Blanc 1988, Ley at al. 1993).…”

Section: Methodsmentioning

confidence: 99%

Clinical observations on the course of oxytocinor prostaglandin E2/oxytocin-induced parturition in mares

Witkowski¹,

Pawłowski²

2014

Polish Journal of Veterinary Sciences

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The objective of this study was to compare the course of parturitions induced with sole oxytocin with those induced with the combination of intracervical prostaglandin E2 jelly and oxytocin. For this purpose 13 mares in advanced pregnancy were allocated to the groups pretreated with either intracervical PGE2 (experimental group) or saline (control group) two hours before intravenous oxytocin (5 IU) administration. The mares were compared with respect to cervical dilation diameter (CDD) 20 min. after oxytocin injection. Time intervals from the first oxytocin dose to: the first external signs of parturition, the chorioallantois rupture, the delivery of a foal and time interval from the delivery of a foal to the placenta separation were measured.Cervical dilatation diameter as well as proportion of mares with cervical dilatation > 20 cm were significantly higher in the group of PGE2 treated mares comparing with control group (p = 0.0115 and p = 0.0490, respectively). All time intervals measured were statistically insignificant for both groups of mares, however time intervals from the first oxytocin dose to the first external signs of parturition, to the allantochorion rupture and to the delivery of a foal, were very close to the significance level (α = 0.05).To conclude, PGE/oxytocin combination has positive influence on the preparation of the uterine cervix to parturition. Moreover, it seems that PGE2 pretreatment reduced total oxytocin dose for successful parturition induction and shortened time elapsing between the first oxytocin dose and the delivery of a foal what is crucial for foal's safety.

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Section: Methodsmentioning

confidence: 99%

Clinical observations on the course of oxytocinor prostaglandin E2/oxytocin-induced parturition in mares

Witkowski¹,

Pawłowski²

2014

Polish Journal of Veterinary Sciences

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“…Pferdeheilkunde 27 288 that measure only [Ca 2+ ] (Ousey et al 1989) or whether kits that also measure [Mg 2+ ] are just as reliable (Ley et al 1993). Because [Mg 2+ ] rises gradually during the last 7-10 days of pregnancy, Ca-Mg combined test kits have been reported to yield more 'false positive' diagnoses of imminent foaling (Ousey et al 1989).…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the most reliable current method for predicting parturition in the mare is analysis of mammary secretion electrolyte concentrations, although even this is far from perfect (Brown Douglas et al, 2002 (Rossdale et al 1991, Paccamonti 2001, fairly good indicators of 'fetal readiness for birth' and whether a mare is or isn't likely to foal within the following 24-72 h (Peaker et al 1979, Leadon et al 1984, Ousey et al 1984, Ley et al 1993 Ousey et al 1984). Even more suggestive of imminent parturition is a steep rise in [Ca 2+ ], or a single measurement in excess of 10 mmol l-1 or 400 p.p.m.…”

Section: Introductionmentioning

confidence: 99%

“…Even more suggestive of imminent parturition is a steep rise in [Ca 2+ ], or a single measurement in excess of 10 mmol l-1 or 400 p.p.m. (Peaker et al 1979, Leadon et al 1984, Ousey et al 1984, Ley et al 1993, Paccamonti 2001. While mammary secretion electrolyte concentrations can be measured with standard clinical biochemical analyzers, it is common to use mare-side test kits developed or modified to detect the increase in [Ca 2+ ].…”

Section: Introductionmentioning

confidence: 99%

“…While mammary secretion electrolyte concentrations can be measured with standard clinical biochemical analyzers, it is common to use mare-side test kits developed or modified to detect the increase in [Ca 2+ ]. Among these, commercial 'water hardness' test kits have been reported to be useful, primarily for indicating when a mare does not need to be observed overnight for possible foaling (Ousey et al 1989, Ley et al 1993). There is some discussion as to whether there should be a preference for kits BRIX refractometric analysis of mammary secretions is a moderate predictor of impending parturition in multiparous but not primiparous mares…”

Section: Introductionmentioning

confidence: 99%

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