Swine Hematology from Birth to Maturity. III. Blood Volume of the Nursing Pig

Ramirez, Christian; Miller, E. R.; Ullrey, D. E.; Hoefer, J. A.

doi:10.2527/jas1963.2241068x

Cited by 49 publications

(35 citation statements)

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“…Although the venous hematocrit of the puppies did not change significantly during the first 48 hr after birth, there was a significant increase in plasma volume similar to that observed in the pig. The increased plasma volume in the pup on day 1 was maintained through the next 5 days, a finding similar to that of Ramirez et al [17] in the pig.…”

Section: Discussionsupporting

confidence: 76%

“…The finding that the hematocrit was maintained or increased during the first 48 hr after birth in the dog was contrary to observations reported by McCance and Widdowson [15] and Ramirez et al [17] on the pig that the venous hematocrit fell significantly during the 24 hr after birth. The decrease was a consequence of an increased plasma volume caused by an increased concentration of plasma proteins in the circulation, the added protein coming from colostrum in the gut [15].…”

Section: Discussioncontrasting

confidence: 57%

“…One of the complicating factors which might account for some of the differences between these data was the time elapsing between delivery and clamping of the cord [9,23]. For many species of animals, including the rat [2,5,10], rabbit [3,16], lamb [12], pig [17], and guinea pig [5], the plasma volume, when expressed in milliliters per kilogram body weight, decreased during growth. The same phenomenon was observed in the beagle, the mean plasma volume being 62 for week 1 after birth, decreasing to 43.5 at 1 year of age.…”

Section: Discussionmentioning

confidence: 99%

“…The blood volume of the newborn of a number of species o£ animals, expressed in milliliters per kilogram body weight (blood volume ratio), is significantly larger than that of the adult [5,11,12,16], although at least one animal, the pig, appears to be an exception to this generalization [17]. It is impossible to decide, because of the contradictory data in the literature, whether or not there is a similar decrease in blood volume with growth in the human [4,19,21].…”

Section: Introductionmentioning

confidence: 99%

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Growth in Beagles: Changes in Body Weight, Plasma Volume, and Venous Hematocrit

1971

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ExtractBody weight, plasma volume, and venous hematocrit of 12-to 18-hr-old beagles were 0.239 ± 0.009 kg, 52.5 ± 1.14 ml/kg, and 48.7 ± 1.72%, respectively. Overthenext 24 hr total plasma volume increased by 31 % and body weight by only 8%. During the 1-year period after birth the plasma volume (milliliters per kilogram) changed abruptly four times, and each change was followed by stable periods of varying length. The plasma volume decreased significantly between weeks 1 and 2, weeks 6 and 7, and months 3 and 4; and, finally, it increased significantly between months 5 and 6. The venous hematocrit declined during the first 6 weeks of life, then gradually increased up to month 6. Body weight, plasma volume, and venous hematocrit did not change significantly from months 6-12. Plasma volume (milliliters per kilogram) for 6-to 12-month-old beagles was 44.3, significantly less than that of the newborn. SpeculationThese data suggest the need to explore mechanisms concerned with the several abrupt changes in the plasma volume that occurred during growth of the beagle and in the mechanisms involved in the marked increase in plasma volume with no reduction in venous hematocrit on day 1.

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Section: Discussionsupporting

confidence: 76%

Section: Discussioncontrasting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Growth in Beagles: Changes in Body Weight, Plasma Volume, and Venous Hematocrit

1971

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“…Nevertheless, it ii possible that the maturity of the animals is also a factor; inde-ed, the fact that growth was not completed in gilts and continued during the first gestation might have conffibuted to a further increase in blood and serum volume over the net effect ofthe gestation. In the case ofthe results reported by Jezkova et al (1977) (Ramirez et al' 1963).-ft reaches 100 mL kg-l eW after colostrum intake and decreases thereafter to 75 mL kg-r eW at 5 wk of age and to approximately 65 mL kg-l gW in mature animals (Anderson et al 1970). In the present experiment' serum volume was correlated with BW at mating (r = +0'47, P = 0.006) and at 14 wk of gestation (r = +0,34t P = 0'060 for the gioup of 36 sows; r = +0.42, P = 0.066 for the group of 20 sows).…”

mentioning

confidence: 84%

Changes of serum and blood volumes during gestation and lactation in multiparous sows

Matte¹,

Girard²

1996

Can. J. Anim. Sci.

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Can. J. Anim. .Changes of ,.-. and plasma volumes were determined in 36 gestating sows and 20 lactating sows at their second parity. There was no change (P > 0.05) in btood and serum-volumes between 4 wk pre-mating and I wk post-matlng' During gestation, blood and serum volumes increasei by approximat ely 2.5%, with most of this increase occurring between 1 1 and l4 wk ofpregnancy (p < 0.006 pr"gnurr"!.^During lactation, a furthir increase of plasma P. Plasma volume was determined for each animal at f,tve volume was observed in gilti; a peak was reached bilween different times before and during gestation, using Evans days 14 and 2l and was followed by a return, at 42 d of lac-blue dye as an indicator. A blood sample was withdrawn by tation, to the level observed at the end of pregnancy jugularvenipuncture afterafastingperiodof atleast 8 h' A (Anderson et al. 1970

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Analysis of blood composition by porcine breeding cycle

Lee,

Jeon

2024

Veterinary Medicine & Sci

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BackgroundPigs for biomedical research are administered commercial fluids made for human consumption when they receive intravenous (IV) fluid therapy. Although pigs and humans have slightly different bodily fluid compositions, the composition shift happens at the same rate as their rapid growth.ObjectiveThe study aimed to analyse the composition of porcine blood according to breeding cycle using a portable blood analyser and provides data for developing customized IV fluids for pigs.MethodsPigs were sorted 25, 50, 100 and 120 days after birth, and sows were classified into candidate, pregnant and farrowing groups. A blood sample was collected from the external jugular vein and analysed using the EPOC blood analysis system using haematological, biochemical and gas parameters.ResultsThere was no difference among pig groups by age, but hematocrit and haemoglobin amounts decreased in sows after farrowing, but their concentrations were higher as compared to pigs. Glucose gradually reduced as age increased in pigs and during pregnancy in sows.ConclusionThis study provided a comprehensive analysis of porcine blood composition by breeding cycle and highlighted the importance of glucose supplementation for IV fluid therapy in pigs.

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Swine Hematology from Birth to Maturity. III. Blood Volume of the Nursing Pig

Cited by 49 publications

References 0 publications

Growth in Beagles: Changes in Body Weight, Plasma Volume, and Venous Hematocrit

Growth in Beagles: Changes in Body Weight, Plasma Volume, and Venous Hematocrit

Changes of serum and blood volumes during gestation and lactation in multiparous sows

Analysis of blood composition by porcine breeding cycle

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